/* ==========================================================================
   DAILY UTILS HUB - PREMIUM DESIGN SYSTEM (GLASSMORPHISM & TRANSITIONS)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* HSL Color System - Light Mode */
    --hue: 217;
    --primary: hsl(var(--hue), 90%, 56%);
    --primary-hover: hsl(var(--hue), 90%, 48%);
    --primary-light: hsl(var(--hue), 95%, 96%);
    --primary-glow: rgba(37, 99, 235, 0.15);
    
    --success: hsl(142, 70%, 45%);
    --success-light: hsl(142, 70%, 96%);
    --warning: hsl(38, 92%, 50%);
    --warning-light: hsl(38, 92%, 96%);
    --error: hsl(350, 80%, 55%);
    --error-light: hsl(350, 80%, 96%);
    
    --bg-app: linear-gradient(135deg, hsl(210, 50%, 98%) 0%, hsl(215, 30%, 94%) 100%);
    --bg-header: #ffffff;
    --bg-glass: rgba(255, 255, 255, 0.75);
    --bg-glass-active: rgba(255, 255, 255, 0.95);
    --bg-card: rgba(255, 255, 255, 0.85);
    --bg-input: rgba(243, 244, 246, 0.8);
    --card-glow-bg: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(37, 99, 235, 0.06), transparent 40%);
    
    --text-primary: hsl(220, 40%, 15%);
    --text-secondary: hsl(220, 15%, 45%);
    --text-muted: hsl(220, 10%, 65%);
    --text-white: hsl(0, 0%, 100%);
    
    --border-glass: rgba(255, 255, 255, 0.6);
    --border-input: hsl(220, 20%, 88%);
    --border-focus: hsl(var(--hue), 90%, 65%);
    
    --shadow-sm: 0 2px 8px -2px rgba(31, 41, 55, 0.05);
    --shadow-md: 0 10px 25px -5px rgba(31, 41, 55, 0.08), 0 8px 16px -6px rgba(31, 41, 55, 0.08);
    --shadow-lg: 0 20px 40px -10px rgba(31, 41, 55, 0.12), 0 12px 20px -8px rgba(31, 41, 55, 0.12);
    --shadow-glow: 0 0 15px rgba(37, 99, 235, 0.2);

    /* Fonts & Radii */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 18px;
    --radius-xl: 24px;
    --radius-full: 9999px;
    
    /* Animation Speeds */
    --anim-fast: 0.15s;
    --anim-base: 0.3s;
    --anim-slow: 0.5s;
    
    /* Layout Constants */
    --sidebar-width: 280px;
    --header-height: 70px;
}

/* HSL Color System - Dark Mode */
[data-theme="dark"] {
    --bg-app: linear-gradient(135deg, hsl(222, 47%, 10%) 0%, hsl(224, 35%, 6%) 100%);
    --bg-header: #0f172a;
    --bg-glass: rgba(17, 24, 39, 0.65);
    --bg-glass-active: rgba(24, 31, 48, 0.85);
    --bg-card: rgba(24, 31, 48, 0.55);
    --bg-input: rgba(17, 24, 39, 0.5);
    --card-glow-bg: radial-gradient(800px circle at var(--mouse-x, 0) var(--mouse-y, 0), rgba(99, 102, 241, 0.15), transparent 40%);
    
    --text-primary: hsl(210, 40%, 98%);
    --text-secondary: hsl(215, 20%, 75%);
    --text-muted: hsl(218, 11%, 50%);
    
    --border-glass: rgba(255, 255, 255, 0.07);
    --border-input: hsl(220, 20%, 20%);
    --border-focus: hsl(var(--hue), 80%, 55%);
    
    --shadow-sm: 0 4px 12px -3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 12px 30px -8px rgba(0, 0, 0, 0.45);
    --shadow-lg: 0 24px 50px -12px rgba(0, 0, 0, 0.6);
    --primary-light: hsl(var(--hue), 30%, 15%);
    --primary-glow: rgba(96, 165, 250, 0.2);
    
    --success-light: hsl(142, 50%, 12%);
    --warning-light: hsl(38, 50%, 12%);
    --error-light: hsl(350, 50%, 14%);
}

/* ==========================================================================
   GLOBAL RESET & BASE STYLES
   ========================================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    scrollbar-width: thin;
    scrollbar-color: var(--text-muted) transparent;
}

body {
    font-family: var(--font-sans);
    background: var(--bg-app);
    color: var(--text-primary);
    height: 100vh;
    overflow: hidden;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    transition: background var(--anim-base) ease, color var(--anim-base) ease;
}

/* Custom Scrollbars */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background-color: var(--text-muted);
    border-radius: var(--radius-full);
}
::-webkit-scrollbar-thumb:hover {
    background-color: var(--text-secondary);
}

/* ==========================================================================
   APP CONTAINER & GLASS LAYOUT
   ========================================================================== */

.app-container {
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow: hidden;
    position: relative;
}

.app-container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--global-mouse-x, 0) var(--global-mouse-y, 0), rgba(37, 99, 235, 0.035), transparent 70%);
    pointer-events: none;
    z-index: 0;
    transition: background 0.1s ease;
}

[data-theme="dark"] .app-container::before {
    background: radial-gradient(900px circle at var(--global-mouse-x, 0) var(--global-mouse-y, 0), rgba(99, 102, 241, 0.06), transparent 70%);
}

/* Header */
.header {
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-input);
    height: var(--header-height);
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
    transition: background var(--anim-base) ease, border var(--anim-base) ease;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    max-width: 1600px;
    margin: 0 auto;
    padding: 0 2rem;
    width: 100%;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-weight: 700;
    font-size: 1.4rem;
    color: var(--primary);
    cursor: pointer;
    letter-spacing: -0.5px;
    white-space: nowrap;
    flex-shrink: 0;
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    background: var(--primary);
    color: var(--text-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-glow);
}

.logo-icon svg {
    width: 20px;
    height: 20px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2.5;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.25rem;
}

.search-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    transition: all var(--anim-base) ease;
}

.search-wrapper input.search-bar {
    width: 200px;
    height: 40px;
    padding: 0 1rem 0 2.5rem;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-full);
    background: var(--bg-input);
    color: var(--text-primary);
    font-size: 0.9rem;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.05);
}

[data-theme="dark"] .search-wrapper input.search-bar {
    background: rgba(0, 0, 0, 0.2);
    border-color: #334155;
}

.search-wrapper input.search-bar::placeholder {
    color: var(--text-muted);
    opacity: 0.7;
    transition: opacity var(--anim-base) ease;
}

.search-wrapper input.search-bar:hover {
    border-color: var(--border-focus);
    background: var(--bg-glass-active);
}

[data-theme="dark"] .search-wrapper input.search-bar:hover {
    background: rgba(0, 0, 0, 0.25);
}

.search-wrapper input.search-bar:focus {
    width: 260px;
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15), var(--shadow-glow-sm);
    background: var(--bg-glass-active);
}

.search-wrapper input.search-bar:focus::placeholder {
    opacity: 0.4;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
}

.search-icon svg {
    width: 16px;
    height: 16px;
    stroke-width: 2.25;
}

.search-wrapper:focus-within .search-icon {
    color: var(--primary);
    transform: translateY(-50%) scale(1.08);
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--anim-base) ease;
}

.theme-toggle:hover {
    background: var(--primary-light);
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm), var(--shadow-glow);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
}

/* ==========================================================================
   MAIN STRUCTURE & SIDEBAR
   ========================================================================== */

.main-container {
    display: flex;
    flex: 1;
    max-width: 1600px;
    margin: 0 auto;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--bg-glass);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-right: 1px solid var(--border-glass);
    padding: 1.5rem 1rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    transition: all var(--anim-base) ease;
    z-index: 100;
    flex-shrink: 0;
}

.tool-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    overflow-y: auto;
    flex: 1;
    margin-bottom: 1rem;
    padding-right: 0.25rem;
    -ms-overflow-style: none;  /* IE and Edge */
    scrollbar-width: none;  /* Firefox */
}

.tool-list::-webkit-scrollbar {
    display: none;
}

.tool-btn {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    width: 100%;
    padding: 0.8rem 1rem;
    border: 1px solid transparent;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 500;
    text-align: left;
    cursor: pointer;
    border-radius: var(--radius-md);
    transition: all var(--anim-fast) ease;
}

.tool-btn svg {
    width: 18px;
    height: 18px;
    transition: transform var(--anim-fast) ease;
}

.tool-btn:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.tool-btn:hover svg {
    transform: scale(1.1);
}

.tool-btn.active {
    background: var(--primary-light);
    color: var(--primary);
    border-color: rgba(37, 99, 235, 0.1);
    font-weight: 600;
    box-shadow: var(--shadow-sm);
}

.sidebar-footer {
    padding-top: 1rem;
    border-top: 1px solid var(--border-glass);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.sidebar-footer a {
    color: var(--text-secondary);
    font-size: 0.8rem;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transition: color var(--anim-fast) ease;
}

.sidebar-footer a:hover {
    color: var(--primary);
}

/* ==========================================================================
   CONTENT PANEL & CARDS
   ========================================================================== */

.content {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    height: 100%;
    position: relative;
}

.tool-section {
    display: none;
    animation: slideUpFade 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.tool-section.active {
    display: block;
}

.tool-section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.tool-title {
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tool-title svg {
    width: 28px;
    height: 28px;
    color: var(--primary);
}

.tool-content {
    background: var(--bg-card);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
    transition: background var(--anim-base) ease, border var(--anim-base) ease;
}

/* ==========================================================================
   INPUTS, FORMS & COMPONENT ACTIONS
   ========================================================================== */

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.input-row {
    display: flex;
    gap: 1rem;
}

input[type="text"],
input[type="number"],
input[type="date"],
textarea,
select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-md);
    background: var(--bg-input);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 0.95rem;
    transition: all var(--anim-base) ease;
}

input[type="text"]:focus,
input[type="number"]:focus,
input[type="date"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--border-focus);
    background: var(--bg-glass-active);
    box-shadow: var(--shadow-glow);
}

textarea {
    resize: vertical;
    min-height: 120px;
}

/* Code Display elements */
.code-area {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
    background: hsl(220, 20%, 97%);
    border: 1px solid var(--border-input);
    border-radius: var(--radius-md);
    padding: 1rem;
    overflow-x: auto;
    color: hsl(220, 40%, 15%);
}

[data-theme="dark"] .code-area {
    background: hsl(220, 20%, 8%);
    color: hsl(210, 40%, 95%);
}

/* Color Picker Styling */
.color-picker-group {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

input[type="color"] {
    appearance: none;
    -webkit-appearance: none;
    border: none;
    width: 42px;
    height: 42px;
    border-radius: var(--radius-md);
    cursor: pointer;
    background: none;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: 1px solid var(--border-input);
    border-radius: var(--radius-md);
}

/* Button UI */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    font-family: var(--font-sans);
    transition: all var(--anim-fast) ease;
}

.btn-primary {
    background: var(--primary);
    color: var(--text-white);
    box-shadow: var(--shadow-glow);
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow), var(--shadow-md);
}

.btn-secondary {
    background: var(--bg-glass);
    border-color: var(--border-input);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: var(--bg-input);
    transform: translateY(-1px);
}

.btn:active {
    transform: scale(0.97);
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

/* Checkboxes & Switches */
.switch-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    background: var(--bg-input);
    border: 1px solid transparent;
    transition: background var(--anim-fast) ease;
}

.switch-container:hover {
    background: rgba(37, 99, 235, 0.05);
}

.switch-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
}

.switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--text-muted);
    transition: .3s;
    border-radius: 34px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(22px);
}

/* Range Input styling */
.range-container {
    margin-bottom: 1.5rem;
}

.range-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.5rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.range-value {
    color: var(--primary);
    font-family: var(--font-mono);
}

input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    background: var(--border-input);
    border-radius: var(--radius-full);
    outline: none;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    transition: transform 0.1s ease;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Tabs */
.tab-container {
    display: flex;
    gap: 0.5rem;
    border-bottom: 2px solid var(--border-input);
    margin-bottom: 1.5rem;
}

.tab-btn {
    padding: 0.75rem 1.25rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: all var(--anim-fast) ease;
}

.tab-btn:hover {
    color: var(--primary);
}

.tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

/* ==========================================================================
   TOOL-SPECIFIC COMPONENT STYLING
   ========================================================================== */

/* 1. Password Generator */
.password-output-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
}

.password-output-wrapper input {
    padding-right: 3.5rem;
    font-family: var(--font-mono);
    font-size: 1.25rem;
    font-weight: 500;
    height: 56px;
    letter-spacing: 0.5px;
    border-width: 2px;
}

.password-copy-btn {
    position: absolute;
    right: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: all var(--anim-fast) ease;
}

.password-copy-btn:hover {
    color: var(--primary);
    background: var(--primary-light);
}

.password-copy-btn svg {
    width: 20px;
    height: 20px;
}

.strength-indicator {
    margin-bottom: 1.5rem;
}

.strength-bar-container {
    height: 6px;
    background: var(--border-input);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 0.5rem;
    display: flex;
    gap: 3px;
}

.strength-segment {
    flex: 1;
    height: 100%;
    background: transparent;
    border-radius: var(--radius-full);
    transition: background-color var(--anim-base) ease;
}

.strength-label-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.85rem;
    font-weight: 600;
}

.strength-requirements {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 0.5rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border-glass);
}

.requirement-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--anim-fast) ease;
}

.requirement-item.valid {
    color: var(--success);
}

.requirement-item svg {
    width: 14px;
    height: 14px;
}

/* 2. QR Code Generator */
.qr-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.qr-preview-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-sm);
}

.qr-canvas-container {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.qr-canvas-container canvas {
    max-width: 100%;
    height: auto;
}

.qr-options {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

/* 3. Color Palette Generator */
.palette-swatches {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.swatch-card {
    background: var(--bg-glass-active);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: transform var(--anim-fast) ease, box-shadow var(--anim-fast) ease;
    cursor: pointer;
}

.swatch-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.swatch-color-box {
    height: 120px;
    width: 100%;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.swatch-color-box svg {
    width: 24px;
    height: 24px;
    color: white;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--anim-fast) ease;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

.swatch-card:hover .swatch-color-box svg {
    opacity: 0.8;
    transform: scale(1.1);
}

.swatch-details {
    padding: 0.75rem;
    text-align: center;
}

.swatch-hex {
    font-family: var(--font-mono);
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.swatch-hsl {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

.contrast-checker {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    padding: 1.25rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    margin-top: 1.5rem;
}

.contrast-preview {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid rgba(0,0,0,0.1);
}

.contrast-score {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.contrast-ratio {
    font-size: 1.5rem;
    font-weight: 700;
}

.contrast-rating {
    display: flex;
    gap: 0.5rem;
}

.badge {
    padding: 0.15rem 0.5rem;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
}

.badge-pass {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid var(--success);
}

.badge-fail {
    background: var(--error-light);
    color: var(--error);
    border: 1px solid var(--error);
}

/* 4. Meme Generator */
.meme-layout {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
}

.meme-preview-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.meme-canvas-container {
    width: 100%;
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    background: #e5e7eb;
    display: flex;
    align-items: center;
    justify-content: center;
}

.meme-canvas-container canvas {
    max-width: 100%;
    height: auto;
    display: block;
}

.meme-fields-container {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.meme-field-item {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: relative;
}

.meme-field-delete {
    position: absolute;
    right: 0.75rem;
    top: 0.75rem;
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
}

.meme-field-delete:hover {
    color: var(--error);
}

.meme-field-delete svg {
    width: 16px;
    height: 16px;
}

/* 5. Fake Data Generator */
.fake-data-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
}

.fake-data-panel {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.fake-data-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: 0.75rem;
}

.fake-data-display {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.fake-data-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid var(--border-glass);
}

.fake-data-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.fake-data-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.fake-data-val {
    font-family: var(--font-mono);
    color: var(--text-primary);
    font-weight: 500;
    text-align: right;
    word-break: break-all;
    max-width: 70%;
}

.bulk-table-container {
    width: 100%;
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-input);
    margin-top: 1rem;
}

.bulk-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    text-align: left;
}

.bulk-table th {
    background: var(--bg-glass-active);
    color: var(--text-secondary);
    font-weight: 600;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-input);
}

.bulk-table td {
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-input);
    color: var(--text-primary);
}

.bulk-table tr:last-child td {
    border-bottom: none;
}

/* 6. Case Converter */
.stats-container {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 0.75rem;
    margin-top: 0.75rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    text-align: center;
    box-shadow: var(--shadow-sm);
}

.stat-value {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary);
    font-family: var(--font-mono);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 0.15rem;
}

/* 7. Base64 Encoder/Decoder */
.drop-zone {
    border: 2px dashed var(--border-input);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
    text-align: center;
    background: var(--bg-glass);
    cursor: pointer;
    transition: all var(--anim-base) ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.drop-zone:hover,
.drop-zone.dragover {
    border-color: var(--primary);
    background: var(--primary-light);
    box-shadow: var(--shadow-glow);
}

.drop-zone svg {
    width: 42px;
    height: 42px;
    color: var(--primary);
}

.drop-zone-text {
    font-weight: 500;
    color: var(--text-secondary);
}

.preview-box {
    margin-top: 1.5rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.preview-box img {
    max-width: 100%;
    max-height: 300px;
    object-fit: contain;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-md);
}

/* 8. JSON Formatter */
.json-layout {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 1.5rem;
}

.json-error-banner {
    padding: 0.75rem 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
    font-size: 0.85rem;
    font-family: var(--font-mono);
    display: none;
}

.json-error-banner.show {
    display: block;
}

/* Syntax Highlighting CSS */
.json-highlighted {
    font-family: var(--font-mono);
    white-space: pre-wrap;
    word-break: break-all;
    overflow-y: auto;
    max-height: 480px;
}

.json-key { color: #881391; }       /* purple */
.json-string { color: #1a1aa6; }    /* blue */
.json-number { color: #1c00cf; }    /* dark blue */
.json-boolean { color: #aa0d91; }   /* magenta */
.json-null { color: #808080; }      /* gray */

[data-theme="dark"] .json-key { color: #d19a66; }      /* peach */
[data-theme="dark"] .json-string { color: #98c379; }   /* green */
[data-theme="dark"] .json-number { color: #d19a66; }   /* orange */
[data-theme="dark"] .json-boolean { color: #56b6c2; }  /* cyan */
[data-theme="dark"] .json-null { color: #abb2bf; }     /* light gray */

/* 9. Todo List Manager */
.todo-card {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.todo-creator {
    display: grid;
    grid-template-columns: 1fr auto auto auto;
    gap: 0.75rem;
    align-items: center;
}

.todo-creator select,
.todo-creator input[type="date"] {
    width: auto;
    min-width: 120px;
}

/* Todo Filters */
.todo-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    padding-top: 0.25rem;
}

.filter-btn {
    padding: 0.45rem 1.15rem;
    font-size: 0.825rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    border: 1px solid var(--border-input);
    background: var(--bg-input);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--anim-base) ease;
}

.filter-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
    border-color: var(--border-focus);
}

.filter-btn.active {
    background: var(--primary);
    color: var(--text-white);
    border-color: var(--primary);
    box-shadow: var(--shadow-sm), var(--shadow-glow);
}

/* Dynamic Due Status Badges */
.todo-due-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.25rem;
}

.due-status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    padding: 0.2rem 0.55rem;
    font-size: 0.7rem;
    font-weight: 700;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

.due-status-badge.status-completed {
    background: var(--success-light);
    color: var(--success);
    border: 1px solid rgba(16, 185, 129, 0.15);
}

.due-status-badge.status-overdue {
    background: var(--error-light);
    color: var(--error);
    border: 1px solid rgba(239, 68, 68, 0.15);
    animation: pulseGlow 2s infinite ease-in-out;
}

.due-status-badge.status-today {
    background: var(--warning-light);
    color: var(--warning);
    border: 1px solid rgba(245, 158, 11, 0.15);
}

.due-status-badge.status-tomorrow {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
    border: 1px solid rgba(37, 99, 235, 0.15);
}

.due-status-badge.status-upcoming {
    background: var(--bg-input);
    color: var(--text-secondary);
    border: 1px solid var(--border-glass);
}

@keyframes pulseGlow {
    0%, 100% {
        box-shadow: 0 0 0 0 rgba(239, 68, 68, 0.2);
    }
    50% {
        box-shadow: 0 0 8px 2px rgba(239, 68, 68, 0.1);
    }
}

.todo-list-container {
    max-height: 450px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.todo-item-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    margin-bottom: 0.75rem;
    box-shadow: var(--shadow-sm);
    transition: all var(--anim-fast) ease;
}

.todo-item-card:hover {
    transform: translateX(3px);
    box-shadow: var(--shadow-md);
}

.todo-item-card.completed {
    opacity: 0.65;
    background: var(--bg-input);
}

.todo-item-card.completed .todo-item-text {
    text-decoration: line-through;
    color: var(--text-muted);
}

.todo-item-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.todo-item-top {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.todo-item-text {
    font-weight: 500;
    font-size: 0.95rem;
}

.todo-tag {
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.15rem 0.4rem;
    border-radius: var(--radius-full);
    text-transform: uppercase;
}

.tag-high { background: var(--error-light); color: var(--error); }
.tag-medium { background: var(--warning-light); color: var(--warning); }
.tag-low { background: hsl(220, 20%, 92%); color: var(--text-secondary); }

[data-theme="dark"] .tag-low {
    background: hsl(220, 20%, 20%);
}

.todo-item-details {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.todo-due-date {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.todo-due-date.overdue {
    color: var(--error);
    font-weight: 600;
}

.todo-actions-btns {
    display: flex;
    gap: 0.5rem;
}

.todo-action-icon-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 0.35rem;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    transition: all var(--anim-fast) ease;
}

.todo-action-icon-btn:hover {
    background: var(--primary-light);
    color: var(--primary);
}

.todo-action-icon-btn.delete:hover {
    background: var(--error-light);
    color: var(--error);
}

.todo-action-icon-btn svg {
    width: 16px;
    height: 16px;
}

/* Subtask checklist UI */
.subtasks-wrapper {
    margin-top: 0.5rem;
    padding-left: 2rem;
    border-left: 1px dashed var(--border-input);
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.subtask-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
}

.subtask-checkbox {
    width: 14px;
    height: 14px;
}

.progress-bar-container {
    width: 100px;
    height: 4px;
    background: var(--border-input);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: var(--success);
    transition: width var(--anim-fast) ease;
}

/* 10. Note Taker Pad */
.note-pad-layout {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 1.5rem;
    min-height: 500px;
}

.note-sidebar {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.note-sidebar-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    overflow-y: auto;
    max-height: 400px;
}

.note-sidebar-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 0.75rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: all var(--anim-fast) ease;
}

.note-sidebar-item:hover {
    background: var(--bg-input);
    color: var(--text-primary);
}

.note-sidebar-item.active {
    background: var(--primary-light);
    color: var(--primary);
    font-weight: 600;
}

.note-delete-icon {
    opacity: 0;
    transition: opacity var(--anim-fast) ease;
    color: var(--text-muted);
}

.note-sidebar-item:hover .note-delete-icon {
    opacity: 1;
}

.note-delete-icon:hover {
    color: var(--error);
}

.note-editor-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.note-editor-panel {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.note-editor-panel textarea {
    flex: 1;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    min-height: 400px;
}

.note-preview-panel {
    border: 1px solid var(--border-input);
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    padding: 1.25rem;
    overflow-y: auto;
    max-height: 470px;
    min-height: 400px;
}

.note-preview-panel h1, 
.note-preview-panel h2, 
.note-preview-panel h3 {
    margin-bottom: 0.75rem;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 0.25rem;
}

.note-preview-panel ul, 
.note-preview-panel ol {
    padding-left: 1.5rem;
    margin-bottom: 1rem;
}

.note-preview-panel li {
    margin-bottom: 0.25rem;
}

.note-preview-panel p {
    margin-bottom: 1rem;
}

.note-preview-panel blockquote {
    border-left: 4px solid var(--primary);
    padding-left: 1rem;
    margin: 1rem 0;
    color: var(--text-secondary);
}

.note-preview-panel code {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    background: var(--bg-input);
    padding: 0.15rem 0.3rem;
    border-radius: var(--radius-sm);
}

.note-preview-panel pre {
    background: hsl(220, 20%, 97%);
    padding: 1rem;
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-bottom: 1rem;
}

[data-theme="dark"] .note-preview-panel pre {
    background: hsl(220, 20%, 8%);
}

.note-preview-panel pre code {
    padding: 0;
    background: transparent;
    font-size: 0.85rem;
}

/* ==========================================================================
   TOASTS & ALERTS
   ========================================================================== */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 9999;
}

.toast {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-glass-active);
    color: var(--text-primary);
    padding: 0.85rem 1.5rem;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 500;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-glass);
    animation: toastSlideIn 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.toast svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.toast.toast-success svg { color: var(--success); }
.toast.toast-error svg { color: var(--error); }
.toast.toast-info svg { color: var(--primary); }

.toast.hide {
    animation: toastSlideOut 0.3s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

/* ==========================================================================
   MOBILE & TABLET RESPONSIVENESS
   ========================================================================== */

.bottom-nav {
    display: none;
}

@media (max-width: 1024px) {
    :root {
        --sidebar-width: 80px;
    }
    
    .tool-btn span,
    .sidebar-footer span {
        display: none;
    }
    
    .tool-btn {
        justify-content: center;
        padding: 0.9rem;
    }
    
    .sidebar-footer {
        justify-content: center;
    }
    
    .qr-layout,
    .meme-layout,
    .note-editor-wrapper {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    .sidebar {
        display: none;
    }
    
    .bottom-nav {
        display: flex;
        position: fixed;
        bottom: 0;
        left: 0;
        right: 0;
        height: 60px;
        background: var(--bg-glass);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border-top: 1px solid var(--border-glass);
        box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.08);
        z-index: 1000;
        overflow-x: auto;
        padding: 0.25rem 0.5rem;
        align-items: center;
        gap: 0.5rem;
    }
    
    .bottom-nav-btn {
        flex: 1;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        border: none;
        background: transparent;
        color: var(--text-secondary);
        font-size: 0.7rem;
        font-weight: 600;
        cursor: pointer;
        padding: 0.35rem 0;
        border-radius: var(--radius-sm);
        min-width: 54px;
        gap: 0.2rem;
        transition: all var(--anim-fast) ease;
    }
    
    .bottom-nav-btn svg {
        width: 20px;
        height: 20px;
    }
    
    .bottom-nav-btn.active {
        color: var(--primary);
        background: var(--primary-light);
    }
    
    .content {
        padding: 1.25rem;
        padding-bottom: 80px; /* space for bottom nav */
        height: 100%;
    }
    
    .tool-content {
        padding: 1.25rem;
    }
    
    .header-content {
        padding: 0 1rem;
    }
    
    .search-wrapper input.search-bar {
        width: 160px;
    }
    
    .search-wrapper input.search-bar:focus {
        width: 200px;
    }
    
    .stats-container {
        grid-template-columns: repeat(3, 1fr);
    }
    
    .palette-swatches {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .fake-data-grid,
    .json-layout,
    .note-pad-layout {
        grid-template-columns: 1fr;
    }
    
    .todo-creator {
        grid-template-columns: 1fr;
    }
}

/* ==========================================================================
   KEYFRAME ANIMATIONS
   ========================================================================== */

@keyframes slideUpFade {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

@keyframes toastSlideOut {
    from {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
    to {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
}

/* ==========================================================================
   WELCOME DASHBOARD & 3D ART
   ========================================================================== */

.dashboard-hero {
    position: relative;
    width: 100%;
    min-height: 280px;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-glass);
    overflow: hidden;
    padding: 2.5rem;
    display: flex;
    align-items: center;
    margin-bottom: 2.5rem;
    box-shadow: var(--shadow-md);
    transition: transform var(--anim-base) ease, box-shadow var(--anim-base) ease;
}

.dashboard-hero:hover {
    box-shadow: var(--shadow-lg);
}

.hero-3d-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: auto;
    z-index: 1;
}

.hero-art-overlay {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 45%;
    background-size: cover;
    background-position: center;
    opacity: 0.85;
    mix-blend-mode: screen;
    pointer-events: none;
    z-index: 2;
    mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
    -webkit-mask-image: linear-gradient(to left, rgba(0,0,0,1) 30%, rgba(0,0,0,0) 100%);
}

[data-theme="light"] .hero-art-overlay {
    mix-blend-mode: multiply;
    opacity: 0.7;
}

.hero-text-content {
    position: relative;
    max-width: 55%;
    z-index: 3;
    pointer-events: none;
}

.hero-badge {
    display: inline-block;
    padding: 0.35rem 0.85rem;
    background: var(--primary-glow);
    border: 1px solid var(--border-focus);
    color: var(--primary);
    font-size: 0.8rem;
    font-weight: 600;
    border-radius: var(--radius-full);
    margin-bottom: 1rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-title {
    font-size: 2.75rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.75rem;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.6;
    margin-bottom: 1.75rem;
}

.hero-stats-row {
    display: flex;
    gap: 2rem;
}

.hero-stat-item {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-lbl {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.dashboard-section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.25rem;
    color: var(--text-primary);
}

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    perspective: 1000px;
    margin-bottom: 2rem;
}

.dashboard-card {
    position: relative;
    border-radius: var(--radius-md);
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    overflow: hidden;
    cursor: pointer;
    box-shadow: var(--shadow-sm);
    transition: transform 0.1s ease, box-shadow var(--anim-base) ease, border-color var(--anim-base) ease;
    transform-style: preserve-3d;
    height: 100%;
}

.dashboard-card:hover {
    border-color: var(--border-focus);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.card-glow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--card-glow-bg);
    z-index: 1;
    pointer-events: none;
}

.card-content-inner {
    padding: 1.75rem;
    z-index: 2;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
    transform: translateZ(30px);
}

.card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    background: var(--primary-glow);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.25rem;
    transform: translateZ(50px);
    transition: transform var(--anim-base) ease;
}

.dashboard-card:hover .card-icon {
    transform: translateZ(65px) scale(1.05);
}

.card-icon svg {
    width: 22px;
    height: 22px;
}

.card-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    transform: translateZ(40px);
}

.card-desc {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.5rem;
    flex-grow: 1;
    transform: translateZ(30px);
}

.card-action {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: flex;
    align-items: center;
    gap: 0.25rem;
    transform: translateZ(45px);
    transition: gap var(--anim-fast) ease;
}

.dashboard-card:hover .card-action {
    gap: 0.5rem;
}

/* Responsiveness overrides */
@media (max-width: 768px) {
    .dashboard-hero {
        padding: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        min-height: auto;
    }
    
    .hero-art-overlay {
        position: relative;
        width: 100%;
        height: 180px;
        margin-top: 1rem;
        background-size: contain;
        background-repeat: no-repeat;
        opacity: 0.9;
        mask-image: none;
        -webkit-mask-image: none;
    }
    
    .hero-text-content {
        max-width: 100%;
    }
    
    .hero-title {
        font-size: 2rem;
    }
}

/* ==========================================================================
   11. PDF & DOCUMENT UTILITIES
   ========================================================================== */

.pdf-tab-content {
    display: none;
}

.pdf-tab-content.active {
    display: block;
    animation: fadeIn var(--anim-base) ease;
}

.pdf-file-list-wrapper {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 1.25rem;
}

.pdf-file-queue {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-height: 320px;
    overflow-y: auto;
    padding-right: 0.25rem;
}

.pdf-file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-glass-active);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 0.75rem 1rem;
    gap: 1rem;
    transition: all var(--anim-fast) ease;
}

.pdf-file-item:hover {
    border-color: var(--border-focus);
    transform: translateY(-1px);
    box-shadow: var(--shadow-sm);
}

.pdf-file-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    overflow: hidden;
    flex: 1;
}

.pdf-file-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.pdf-file-icon svg {
    width: 18px;
    height: 18px;
}

.pdf-file-text-details {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.pdf-file-name {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdf-file-size {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
}

.pdf-file-actions {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.pdf-action-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 30px;
    height: 30px;
    border: 1px solid var(--border-glass);
    background: var(--bg-glass);
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--anim-fast) ease;
}

.pdf-action-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.pdf-action-btn.delete-btn:hover {
    background: #ef4444;
    color: white;
    border-color: #ef4444;
}

.pdf-action-btn svg {
    width: 14px;
    height: 14px;
}

.pdf-selected-file-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: rgba(37, 99, 235, 0.05);
    border: 1px dashed var(--primary);
    border-radius: var(--radius-md);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 500;
}

.pdf-selected-file-info svg {
    width: 16px;
    height: 16px;
}

.compression-info-box {
    box-shadow: var(--shadow-sm);
}

/* --- PDF Directory & Workspace Extensions --- */
.pdf-directory-view {
    animation: fadeIn var(--anim-base) ease;
}

.directory-subtitle {
    color: var(--text-secondary);
    margin-top: -0.75rem;
    margin-bottom: 2rem;
    font-size: 0.95rem;
    line-height: 1.5;
}

.pdf-category-section {
    margin-bottom: 2.5rem;
}

.pdf-category-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 0.6rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.pdf-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1rem;
}

.pdf-tool-card {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.15rem;
    cursor: pointer;
    transition: transform 0.1s ease, border-color var(--anim-base) ease, box-shadow var(--anim-base) ease, background var(--anim-base) ease;
    height: 100%;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.pdf-tool-card:hover {
    border-color: var(--primary);
    background: var(--bg-glass-active);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.tool-card-icon {
    width: 44px;
    height: 44px;
    background: rgba(37, 99, 235, 0.08);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    transition: background var(--anim-base) ease;
}

.pdf-tool-card:hover .tool-card-icon {
    background: rgba(37, 99, 235, 0.15);
}

.tool-card-icon svg {
    width: 22px;
    height: 22px;
    color: var(--primary);
    stroke-width: 2;
    transition: transform var(--anim-base) ease;
}

.pdf-tool-card:hover .tool-card-icon svg {
    transform: scale(1.15);
}

.category-icon {
    width: 20px;
    height: 20px;
    color: var(--primary);
    flex-shrink: 0;
}

.tool-card-info {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.tool-card-title {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.tool-card-desc {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.35;
    margin: 0;
}

.pdf-workspace-view {
    animation: fadeIn var(--anim-base) ease;
}

.workspace-nav-bar {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-glass);
    padding-bottom: 1rem;
}

.workspace-meta {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.workspace-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.workspace-description {
    font-size: 0.825rem;
    color: var(--text-secondary);
    margin: 0;
}

.workspace-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow-md);
}

.btn-process {
    width: 100%;
    height: 48px;
    font-size: 0.925rem;
    font-weight: 600;
    margin-top: 1.25rem;
}

.btn-back {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 600;
    padding: 0.5rem 0.85rem;
}

.info-note {
    background: rgba(37, 99, 235, 0.05);
    border: 1px solid rgba(37, 99, 235, 0.1);
    border-radius: var(--radius-md);
    padding: 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1.25rem;
}

.queue-heading {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
}

.input-group.check-group {
    flex-direction: row !important;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    margin: 0.35rem 0;
}

.input-group.check-group input[type="checkbox"] {
    width: 17px;
    height: 17px;
    margin: 0;
    cursor: pointer;
}

.input-group.check-group label {
    margin: 0;
    font-weight: 500;
    cursor: pointer;
    font-size: 0.825rem;
}

.color-picker-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.color-picker-group input[type="color"] {
    width: 42px;
    height: 42px;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-md);
    background: none;
    cursor: pointer;
    padding: 2px;
}

.color-picker-group input[type="text"] {
    flex: 1;
}

.input-hint {
    font-size: 0.725rem;
    color: var(--text-muted);
    margin-top: 0.25rem;
    display: block;
}

/* HR Utilities Section Styling */
.hr-directory-view {
    animation: fadeIn var(--anim-base) ease;
}

.hr-tool-card {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.15rem;
    cursor: pointer;
    transition: transform 0.1s ease, border-color var(--anim-base) ease, box-shadow var(--anim-base) ease, background var(--anim-base) ease;
    height: 100%;
    position: relative;
    overflow: hidden;
    transform-style: preserve-3d;
}

.hr-tool-card:hover {
    border-color: var(--primary);
    background: var(--bg-glass-active);
    box-shadow: var(--shadow-md), var(--shadow-glow);
}

.hr-tool-card:hover .tool-card-icon {
    background: rgba(37, 99, 235, 0.15);
}

.hr-tool-card:hover .tool-card-icon svg {
    transform: scale(1.15);
}

.hr-workspace-view {
    animation: fadeIn var(--anim-base) ease;
}

.hr-tool-workspace {
    animation: fadeIn var(--anim-base) ease;
}

/* Global Loader Overlay Styling */
.global-loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease;
}

.global-loader-content {
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-xl);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.25rem;
    box-shadow: var(--shadow-xl), var(--shadow-glow-sm);
    max-width: 320px;
    text-align: center;
}

.global-loader-spinner {
    width: 48px;
    height: 48px;
    border: 4px solid rgba(37, 99, 235, 0.1);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.global-loader-text {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ==========================================================================
   Header Navigation & Dropdown Menus
   ========================================================================== */

.header-nav {
    margin-left: 2.5rem;
    margin-right: auto;
}

@media (max-width: 768px) {
    .header-nav {
        display: none; /* Hide top nav on mobile, use bottom-nav */
    }
}

.nav-list {
    display: flex;
    align-items: center;
    gap: 1.1rem;
    list-style: none;
    margin: 0;
    padding: 0;
}

.nav-item {
    position: relative;
    padding: 0.5rem 0;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    background: transparent;
    border: 1px solid transparent;
    color: var(--text-secondary);
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-full);
    transition: all var(--anim-base) ease;
    white-space: nowrap;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary);
    background: var(--primary-glow);
    border-color: rgba(37, 99, 235, 0.15);
}

/* Fix browser outline on nav links and other buttons */
.nav-link:focus,
.dropdown-item:focus,
.filter-btn:focus,
.btn:focus,
.todo-action-icon-btn:focus {
    outline: none;
}

.chevron-icon {
    width: 14px;
    height: 14px;
    transition: transform var(--anim-base) ease;
}

.nav-item:hover .chevron-icon {
    transform: rotate(180deg);
}

/* Dropdown Menu Container */
.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(12px);
    background: #ffffff;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg), 0 10px 30px rgba(0, 0, 0, 0.05);
    padding: 0.6rem;
    display: flex;
    visibility: hidden;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 290px;
    z-index: 1100;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--anim-base) ease, transform var(--anim-base) ease, visibility var(--anim-base) ease;
}

/* Invisible bridge to maintain hover between trigger and menu */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -16px;
    left: 0;
    right: 0;
    height: 16px;
    background: transparent;
}

.nav-item:hover > .dropdown-menu,
.nav-item.dropdown:hover > .dropdown-menu {
    visibility: visible;
    opacity: 1;
    pointer-events: auto;
    transform: translateX(-50%) translateY(0);
}

.dropdown-menu.open {
    display: flex !important;
    visibility: visible !important;
    opacity: 1 !important;
    pointer-events: auto !important;
    transform: translateX(-50%) translateY(0) !important;
}

/* Dropdown Items styling */
.dropdown-item {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 0.65rem 0.8rem;
    border-radius: var(--radius-md);
    background: transparent;
    border: none;
    text-align: left;
    width: 100%;
    cursor: pointer;
    color: var(--text-primary);
    transition: all var(--anim-base) ease;
}

.dropdown-item svg {
    width: 18px;
    height: 18px;
    margin-top: 0.15rem;
    color: var(--text-secondary);
    flex-shrink: 0;
    transition: color var(--anim-base) ease;
}

.dropdown-item:hover {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary);
}

.dropdown-item:hover svg {
    color: var(--primary);
}

.dropdown-item.active {
    background: rgba(37, 99, 235, 0.12);
    color: var(--primary);
}

.dropdown-item.active svg {
    color: var(--primary);
}

.dropdown-item-info {
    display: flex;
    flex-direction: column;
}

.dropdown-item-title {
    font-size: 0.88rem;
    font-weight: 700;
    line-height: 1.2;
}

.dropdown-item-desc {
    font-size: 0.72rem;
    color: var(--text-muted);
    margin-top: 0.2rem;
    line-height: 1.3;
}

/* GitHub Link in Header Actions */
.github-link-header {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    width: 40px;
    height: 40px;
    border: 1px solid var(--border-input);
    border-radius: var(--radius-full);
    background: var(--bg-glass);
    transition: all var(--anim-base) ease;
}

.github-link-header:hover {
    color: var(--primary);
    border-color: var(--primary);
    background: var(--primary-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm), var(--shadow-glow);
}


/* ==========================================================================
   Tool Workspace: Image Compressor & Converter
   ========================================================================== */

.compressor-workspace {
    max-width: 900px;
    margin: 0 auto;
}

.img-compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-top: 1.5rem;
}

@media (max-width: 768px) {
    .img-compare-grid {
        grid-template-columns: 1fr;
    }
}

.img-compare-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    box-shadow: var(--shadow-sm);
}

.img-compare-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-weight: 700;
    font-size: 0.9rem;
}

.img-compare-preview {
    background: rgba(0, 0, 0, 0.05);
    border-radius: var(--radius-md);
    height: 260px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-glass);
}

.img-compare-preview img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
}


/* Dark theme solid dropdown overrides */
[data-theme="dark"] .dropdown-menu {
    background: #1e293b !important;
    border: 1px solid #334155 !important;
}

/* ==========================================================================
   Tool Workspace: Percentage, Sales Tax, Geometry and Test Grade Suites
   ========================================================================== */

.calculator-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    transition: transform var(--anim-base) ease, border-color var(--anim-base) ease;
}

.calculator-card:hover {
    border-color: var(--primary);
}

.result-box {
    background: rgba(37, 99, 235, 0.04);
    border: 1px dashed rgba(37, 99, 235, 0.25);
    border-radius: var(--radius-sm);
    padding: 1rem;
    font-size: 0.95rem;
    color: var(--text-primary);
    box-sizing: border-box;
}

[data-theme="dark"] .result-box {
    background: rgba(99, 102, 241, 0.05);
    border-color: rgba(99, 102, 241, 0.3);
}

.result-box strong {
    font-weight: 700;
}

.pdf-table th, .pdf-table td {
    border: 1px solid var(--border-input);
    padding: 0.65rem 0.5rem;
    font-size: 0.88rem;
}

.pdf-table tr:nth-child(even) {
    background: rgba(0, 0, 0, 0.02);
}

[data-theme="dark"] .pdf-table tr:nth-child(even) {
    background: rgba(255, 255, 255, 0.02);
}

/* Responsive adjustments for header navigation alignment and spacing */
@media (max-width: 1200px) {
    .header-content {
        padding: 0 1rem;
    }
    .header-nav {
        margin-left: 1.5rem;
    }
    .nav-list {
        gap: 0.6rem;
    }
    .nav-link {
        padding: 0.35rem 0.65rem;
        font-size: 0.82rem;
    }
}

@media (max-width: 992px) {
    .header-nav {
        margin-left: 1rem;
    }
    .nav-list {
        gap: 0.4rem;
    }
    .nav-link {
        padding: 0.3rem 0.5rem;
        font-size: 0.78rem;
    }
    .search-wrapper input.search-bar {
        width: 140px;
    }
    .header-actions {
        gap: 0.85rem;
    }
}