/* ===========================
   PurePDF - Modern Professional Design
   Color Palette: Navy/Slate + Teal Accents
   =========================== */

/* CSS Reset & Custom Properties */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Primary Colors - Teal */
    --primary-50: #F0FDFA;
    --primary-100: #CCFBF1;
    --primary-200: #99F6E4;
    --primary-300: #5EEAD4;
    --primary-400: #2DD4BF;
    --primary-500: #14B8A6;
    --primary-600: #0D9488;
    --primary-700: #0F766E;
    --primary-800: #115E59;
    --primary-900: #134E4A;
    
    /* Neutral Colors - Slate */
    --slate-50: #F8FAFC;
    --slate-100: #F1F5F9;
    --slate-200: #E2E8F0;
    --slate-300: #CBD5E1;
    --slate-400: #94A3B8;
    --slate-500: #64748B;
    --slate-600: #475569;
    --slate-700: #334155;
    --slate-800: #1E293B;
    --slate-900: #0F172A;
    --slate-950: #020617;
    
    /* Semantic Colors */
    --success: #10B981;
    --success-light: #D1FAE5;
    --warning: #F59E0B;
    --warning-light: #FEF3C7;
    --danger: #EF4444;
    --danger-light: #FEE2E2;
    
    /* Background & Surface */
    --bg-primary: #FFFFFF;
    --bg-secondary: var(--slate-50);
    --bg-tertiary: var(--slate-100);
    --surface: #FFFFFF;
    
    /* Text */
    --text-primary: var(--slate-900);
    --text-secondary: var(--slate-600);
    --text-tertiary: var(--slate-400);
    --text-inverse: #FFFFFF;
    
    /* Borders */
    --border-light: var(--slate-200);
    --border-medium: var(--slate-300);
    
    /* Shadows */
    --shadow-xs: 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-sm: 0 1px 3px rgba(15, 23, 42, 0.06), 0 1px 2px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.08), 0 2px 4px -2px rgba(15, 23, 42, 0.04);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --shadow-xl: 0 20px 25px -5px rgba(15, 23, 42, 0.1), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
    --shadow-2xl: 0 25px 50px -12px rgba(15, 23, 42, 0.2);
    --shadow-primary: 0 4px 14px rgba(13, 148, 136, 0.25);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 200ms ease;
    --transition-slow: 300ms ease;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Spacing */
    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-8: 32px;
    --space-10: 40px;
    --space-12: 48px;
    --space-16: 64px;
    --space-20: 80px;
}

/* Base Styles */
html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-secondary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-6);
    width: 100%;
}

/* ===========================
   Header
   =========================== */
.header {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    padding: var(--space-4) 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(12px);
    background: rgba(255, 255, 255, 0.95);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-text {
    font-size: 1.375rem;
    font-weight: 700;
    letter-spacing: -0.02em;
}

.nav {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.9375rem;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.nav-link:hover:not(.disabled) {
    color: var(--primary-700);
    background: var(--primary-50);
}

.nav-link.active {
    color: var(--text-inverse);
    background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
    box-shadow: var(--shadow-primary);
}

.nav-link.disabled {
    opacity: 0.4;
    cursor: not-allowed;
    pointer-events: none;
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    position: relative;
    padding: var(--space-16) 0 var(--space-12);
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, var(--primary-50) 0%, var(--bg-secondary) 100%);
    z-index: -1;
}

.hero-bg::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -20%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--primary-100) 0%, transparent 70%);
    opacity: 0.6;
}

.hero-bg::after {
    content: '';
    position: absolute;
    bottom: -30%;
    left: -10%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--primary-100) 0%, transparent 70%);
    opacity: 0.4;
}

.hero-content {
    text-align: center;
    max-width: 800px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    background: var(--success-light);
    color: #065F46;
    padding: var(--space-2) var(--space-4);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-6);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.hero-badge svg {
    color: var(--success);
}

.hero-title {
    font-size: clamp(2.25rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    color: var(--text-primary);
    margin-bottom: var(--space-5);
    letter-spacing: -0.03em;
}

.text-gradient {
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-8);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Trust Badges */
.trust-badges {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    flex-wrap: wrap;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
}

.trust-item svg {
    color: var(--primary-600);
}

.trust-divider {
    width: 1px;
    height: 20px;
    background: var(--border-medium);
}

/* ===========================
   Main Content
   =========================== */
.main {
    flex: 1;
    padding-bottom: var(--space-20);
}

/* ===========================
   Upload Section
   =========================== */
.upload-section {
    max-width: 720px;
    margin: calc(-1 * var(--space-8)) auto var(--space-16);
    position: relative;
    z-index: 10;
}

.upload-card {
    background: var(--bg-primary);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

/* Drop Zone */
.drop-zone {
    padding: var(--space-12) var(--space-8);
    border: 2px dashed var(--border-medium);
    border-radius: var(--radius-xl);
    margin: var(--space-6);
    cursor: pointer;
    transition: all var(--transition-base);
    background: var(--bg-secondary);
}

.drop-zone:hover {
    border-color: var(--primary-400);
    background: var(--primary-50);
}

.drop-zone.drag-over {
    border-color: var(--primary-500);
    background: var(--primary-50);
    transform: scale(1.01);
    box-shadow: 0 0 0 4px var(--primary-100);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.drop-icon {
    width: 80px;
    height: 80px;
    background: linear-gradient(135deg, var(--primary-100), var(--primary-50));
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-5);
    color: var(--primary-600);
}

.drop-title {
    font-size: 1.375rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.drop-subtitle {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    font-weight: 500;
    margin: var(--space-4) 0;
}

.drop-hint {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-tertiary);
    font-size: 0.8125rem;
    margin-top: var(--space-4);
}

/* ===========================
   Buttons
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-5);
    font-family: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
    line-height: 1.4;
    white-space: nowrap;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
    color: var(--text-inverse);
    box-shadow: var(--shadow-primary);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--primary-800), var(--primary-700));
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(13, 148, 136, 0.35);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

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

.btn-danger-text {
    color: var(--danger);
}

.btn-danger-text:hover {
    background: var(--danger-light);
    color: var(--danger);
}

.btn-sm {
    padding: var(--space-2) var(--space-3);
    font-size: 0.8125rem;
    border-radius: var(--radius-sm);
}

.btn-lg {
    padding: var(--space-4) var(--space-6);
    font-size: 1rem;
    border-radius: var(--radius-lg);
}

.btn-xl {
    padding: var(--space-5) var(--space-8);
    font-size: 1.0625rem;
    border-radius: var(--radius-lg);
    width: 100%;
}

/* ===========================
   File List
   =========================== */
.file-list-container {
    padding: var(--space-6);
}

.file-list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-4);
    border-bottom: 1px solid var(--border-light);
}

.file-count {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.9375rem;
}

.file-count svg {
    color: var(--primary-600);
}

.file-list-actions {
    display: flex;
    gap: var(--space-2);
}

.file-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    max-height: 320px;
    overflow-y: auto;
    padding-right: var(--space-2);
}

.file-list::-webkit-scrollbar {
    width: 6px;
}

.file-list::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

.file-list::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: var(--radius-full);
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-lg);
    cursor: grab;
    transition: all var(--transition-fast);
}

.file-item:hover {
    background: var(--bg-primary);
    border-color: var(--primary-200);
    box-shadow: var(--shadow-sm);
}

.file-item.dragging {
    opacity: 0.5;
    cursor: grabbing;
}

.file-info {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    flex: 1;
    min-width: 0;
}

.file-icon {
    width: 44px;
    height: 44px;
    background: linear-gradient(135deg, var(--primary-600), var(--primary-500));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-inverse);
    font-weight: 700;
    font-size: 0.6875rem;
    letter-spacing: 0.02em;
    flex-shrink: 0;
}

.file-details {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9375rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.8125rem;
    color: var(--text-tertiary);
    margin-top: 2px;
}

.file-actions {
    display: flex;
    gap: var(--space-2);
    align-items: center;
}

.drag-handle {
    color: var(--text-tertiary);
    cursor: grab;
    padding: var(--space-1);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.drag-handle:hover {
    color: var(--text-secondary);
    background: var(--bg-tertiary);
}

.btn-icon {
    width: 32px;
    height: 32px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-tertiary);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.btn-icon:hover {
    background: var(--danger-light);
    color: var(--danger);
}

/* Merge Actions */
.merge-actions {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.merge-hint {
    margin-top: var(--space-3);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

/* ===========================
   Progress
   =========================== */
.progress-container {
    padding: var(--space-10);
    text-align: center;
}

.progress-icon {
    margin-bottom: var(--space-5);
}

.spinner {
    width: 56px;
    height: 56px;
    border: 4px solid var(--primary-100);
    border-top-color: var(--primary-600);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.progress-info h3 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.progress-info p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
}

.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin: var(--space-6) auto 0;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-600), var(--primary-400));
    border-radius: var(--radius-full);
    transition: width var(--transition-slow);
    width: 0%;
}

/* ===========================
   Success State
   =========================== */
.success-container {
    padding: var(--space-12);
    text-align: center;
}

.success-icon {
    color: var(--success);
    margin-bottom: var(--space-5);
    animation: successPop 0.5s ease;
}

@keyframes successPop {
    0% { transform: scale(0); opacity: 0; }
    50% { transform: scale(1.2); }
    100% { transform: scale(1); opacity: 1; }
}

.success-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.success-subtitle {
    color: var(--text-secondary);
    margin-bottom: var(--space-6);
}

/* ===========================
   How It Works Section
   =========================== */
.how-it-works {
    padding: var(--space-16) 0;
}

.section-title {
    text-align: center;
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
    letter-spacing: -0.02em;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 1.0625rem;
    margin-bottom: var(--space-12);
}

.steps-grid {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.step-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-8);
    text-align: center;
    max-width: 280px;
    flex: 1;
    min-width: 240px;
    position: relative;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

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

.step-number {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    width: 28px;
    height: 28px;
    background: linear-gradient(135deg, var(--primary-700), var(--primary-600));
    color: var(--text-inverse);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-primary);
}

.step-icon {
    width: 72px;
    height: 72px;
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto var(--space-5);
    color: var(--primary-600);
}

.step-card h3 {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

.step-connector {
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--border-medium);
    flex-shrink: 0;
    padding-top: var(--space-10);
}

/* ===========================
   Features Section
   =========================== */
.features {
    padding: var(--space-12) 0 var(--space-16);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: var(--space-6);
}

.feature-card {
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    border: 1px solid var(--border-light);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--primary-200);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--primary-50), var(--primary-100));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-4);
    color: var(--primary-600);
}

.feature-card h3 {
    font-size: 1.0625rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.feature-card p {
    color: var(--text-secondary);
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ===========================
   FAQ Section
   =========================== */
.faq {
    padding: var(--space-12) 0 var(--space-16);
    max-width: 800px;
    margin: 0 auto;
}

.faq-grid {
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
}

.faq-item {
    background: var(--bg-primary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-light);
    overflow: hidden;
    transition: all var(--transition-fast);
}

.faq-item:hover {
    border-color: var(--primary-200);
}

.faq-item.active {
    border-color: var(--primary-300);
    box-shadow: var(--shadow-md);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-5) var(--space-6);
    background: none;
    border: none;
    cursor: pointer;
    text-align: left;
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.faq-question:hover {
    color: var(--primary-700);
}

.faq-question svg {
    color: var(--text-tertiary);
    transition: transform var(--transition-base);
    flex-shrink: 0;
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
    color: var(--primary-600);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: all var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 200px;
}

.faq-answer p {
    padding: 0 var(--space-6) var(--space-5);
    color: var(--text-secondary);
    line-height: 1.7;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background: var(--slate-900);
    color: var(--slate-300);
    padding: var(--space-16) 0 var(--space-8);
    margin-top: auto;
}

.footer-content {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-12);
    padding-bottom: var(--space-10);
    border-bottom: 1px solid var(--slate-800);
}

.footer-brand .logo {
    margin-bottom: var(--space-4);
}

.footer-brand .logo-text {
    color: var(--text-inverse);
}

.footer-tagline {
    color: var(--slate-400);
    font-size: 0.9375rem;
    max-width: 280px;
}

.footer-links {
    display: flex;
    gap: var(--space-12);
}

.footer-column h4 {
    color: var(--text-inverse);
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-4);
}

.footer-column a {
    display: block;
    color: var(--slate-400);
    text-decoration: none;
    font-size: 0.9375rem;
    padding: var(--space-2) 0;
    transition: color var(--transition-fast);
}

.footer-column a:hover:not(.disabled) {
    color: var(--primary-400);
}

.footer-column a.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-8);
    font-size: 0.875rem;
    color: var(--slate-500);
}

.footer-note {
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

/* ===========================
   Animations
   =========================== */
.animate-fade-in {
    animation: fadeIn 0.6s ease forwards;
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease forwards;
}

.delay-1 {
    animation-delay: 0.1s;
    opacity: 0;
}

.delay-2 {
    animation-delay: 0.2s;
    opacity: 0;
}

.delay-3 {
    animation-delay: 0.3s;
    opacity: 0;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .step-connector {
        display: none;
    }
    
    .steps-grid {
        gap: var(--space-8);
    }
}

@media (max-width: 768px) {
    :root {
        --space-16: 48px;
        --space-20: 64px;
    }
    
    .hero {
        padding: var(--space-12) 0 var(--space-10);
    }
    
    .hero-title {
        font-size: 2rem;
    }
    
    .trust-badges {
        gap: var(--space-4);
    }
    
    .trust-divider {
        display: none;
    }
    
    .trust-item {
        width: 100%;
        justify-content: center;
    }
    
    .nav {
        gap: var(--space-1);
    }
    
    .nav-link {
        padding: var(--space-2) var(--space-3);
        font-size: 0.875rem;
    }
    
    .upload-section {
        margin-top: calc(-1 * var(--space-6));
    }
    
    .drop-zone {
        padding: var(--space-8) var(--space-4);
        margin: var(--space-4);
    }
    
    .steps-grid {
        flex-direction: column;
    }
    
    .step-card {
        max-width: 100%;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--space-8);
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--space-8);
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-3);
        text-align: center;
    }
    
    .file-list-header {
        flex-direction: column;
        gap: var(--space-3);
        align-items: flex-start;
    }
    
    .file-list-actions {
        width: 100%;
        justify-content: space-between;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--space-4);
    }
    
    .logo-text {
        font-size: 1.125rem;
    }
    
    .hero-title {
        font-size: 1.75rem;
    }
    
    .hero-subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .drop-icon {
        width: 64px;
        height: 64px;
    }
    
    .drop-icon svg {
        width: 36px;
        height: 36px;
    }
    
    .file-item {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-3);
    }
    
    .file-actions {
        align-self: flex-end;
    }
}

/* ===========================
   Utility Classes
   =========================== */
.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===========================
   Split PDF Specific Styles
   =========================== */
.split-options {
    padding: var(--space-6);
}

.file-info-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--space-5);
    border-bottom: 1px solid var(--border-light);
    margin-bottom: var(--space-6);
}

.file-info-details {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

.split-mode-selector h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.mode-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--space-4);
}

.mode-option {
    cursor: pointer;
}

.mode-option input {
    display: none;
}

.mode-card {
    display: flex;
    align-items: center;
    gap: var(--space-4);
    padding: var(--space-5);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.mode-option input:checked + .mode-card {
    border-color: var(--primary-500);
    background: var(--primary-50);
}

.mode-card:hover {
    border-color: var(--primary-300);
}

.mode-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    color: var(--primary-600);
    flex-shrink: 0;
}

.mode-info {
    display: flex;
    flex-direction: column;
    gap: var(--space-1);
}

.mode-info strong {
    font-size: 0.9375rem;
    color: var(--text-primary);
}

.mode-info span {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.split-config {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
}

.page-selector label,
.range-input-container label {
    display: block;
    font-size: 0.9375rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-3);
}

.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: inherit;
    font-size: 0.9375rem;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px var(--primary-100);
}

.input::placeholder {
    color: var(--text-tertiary);
}

.textarea {
    min-height: 120px;
    resize: vertical;
    line-height: 1.6;
}

.input-hint {
    margin-top: var(--space-2);
    font-size: 0.8125rem;
    color: var(--text-tertiary);
}

.page-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    gap: var(--space-3);
    margin-top: var(--space-4);
    max-height: 300px;
    overflow-y: auto;
    padding: var(--space-2);
}

.page-item {
    cursor: pointer;
    text-align: center;
    transition: all var(--transition-fast);
}

.page-preview {
    aspect-ratio: 3/4;
    background: var(--bg-tertiary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.page-item:hover .page-preview {
    border-color: var(--primary-300);
    background: var(--primary-50);
}

.page-item.selected .page-preview {
    border-color: var(--primary-500);
    background: var(--primary-100);
}

.page-number {
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--text-secondary);
}

.page-item.selected .page-number {
    color: var(--primary-700);
}

.page-label {
    margin-top: var(--space-1);
    font-size: 0.75rem;
    color: var(--text-tertiary);
}

.split-actions {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

/* ===========================
   Compress PDF Specific Styles
   =========================== */
.compress-options {
    padding: var(--space-6);
}

.quality-selector h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.quality-options {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-3);
}

.quality-option {
    cursor: pointer;
}

.quality-option input {
    display: none;
}

.quality-card {
    padding: var(--space-5);
    background: var(--bg-secondary);
    border: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-fast);
}

.quality-option input:checked + .quality-card {
    border-color: var(--primary-500);
    background: var(--primary-50);
}

.quality-card:hover {
    border-color: var(--primary-300);
}

.quality-icon {
    width: 48px;
    height: 48px;
    margin: 0 auto var(--space-3);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-primary);
    border-radius: var(--radius-md);
    color: var(--primary-600);
}

.quality-card strong {
    display: block;
    font-size: 0.9375rem;
    color: var(--text-primary);
    margin-bottom: var(--space-1);
}

.quality-card span {
    font-size: 0.8125rem;
    color: var(--text-secondary);
}

.compress-info {
    margin-top: var(--space-6);
    padding: var(--space-5);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.compress-stats {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-4);
    align-items: center;
}

.stat-box {
    text-align: center;
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-1);
}

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

.stat-arrow {
    color: var(--primary-500);
}

.stat-value.success {
    color: var(--success);
}

.compress-actions {
    margin-top: var(--space-6);
    padding-top: var(--space-6);
    border-top: 1px solid var(--border-light);
    text-align: center;
}

.result-comparison {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
    flex-wrap: wrap;
}

.result-item {
    text-align: center;
}

.result-item .label {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    margin-bottom: var(--space-1);
}

.result-item .value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
}

.result-item .value.reduced {
    color: var(--success);
}

.result-arrow {
    color: var(--text-tertiary);
}

.savings-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--success-light);
    color: #065F46;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: var(--space-6);
}

@media (max-width: 768px) {
    .mode-options {
        grid-template-columns: 1fr;
    }
    
    .quality-options {
        grid-template-columns: 1fr;
    }
    
    .compress-stats {
        grid-template-columns: 1fr;
        gap: var(--space-3);
    }
    
    .stat-arrow {
        transform: rotate(90deg);
    }
    
    .page-grid {
        grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
    }
}

/* ===========================
   Convert Preview Styles
   =========================== */
.convert-preview {
    margin-top: var(--space-6);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
}

.convert-flow {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
}

.convert-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
}

.convert-item span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.convert-icon {
    width: 72px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.convert-icon.pdf {
    background: linear-gradient(135deg, #DC2626, #EF4444);
    color: white;
}

.convert-icon.word {
    background: linear-gradient(135deg, #2563EB, #3B82F6);
    color: white;
}

.convert-arrow {
    color: var(--primary-500);
    animation: arrowPulse 1.5s ease-in-out infinite;
}

@keyframes arrowPulse {
    0%, 100% { transform: translateX(0); opacity: 1; }
    50% { transform: translateX(4px); opacity: 0.7; }
}

.file-icon-pdf {
    background: linear-gradient(135deg, #DC2626, #EF4444) !important;
}

.file-icon-word {
    background: linear-gradient(135deg, #2563EB, #3B82F6) !important;
}

@media (max-width: 480px) {
    .convert-flow {
        flex-direction: column;
        gap: var(--space-4);
    }
    
    .convert-arrow {
        transform: rotate(90deg);
    }
    
    .convert-arrow svg {
        transform: rotate(90deg);
    }
}

/* ===========================
   Legal Pages (Privacy, Terms)
   =========================== */
.legal-page {
    padding: var(--space-12) 0;
}

.legal-content {
    max-width: 800px;
    margin: 0 auto;
    background: var(--bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-10);
    box-shadow: var(--shadow-lg);
}

.legal-content h1 {
    font-size: 2rem;
    font-weight: 800;
    color: var(--text-primary);
    margin-bottom: var(--space-2);
}

.legal-updated {
    color: var(--text-tertiary);
    font-size: 0.875rem;
    margin-bottom: var(--space-8);
    padding-bottom: var(--space-6);
    border-bottom: 1px solid var(--border-light);
}

.legal-section {
    margin-bottom: var(--space-8);
}

.legal-section h2 {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--border-light);
}

.legal-section:first-of-type h2 {
    border-top: none;
    padding-top: 0;
}

.legal-section h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-top: var(--space-5);
    margin-bottom: var(--space-3);
}

.legal-section p {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-4);
}

.legal-section ul {
    margin-left: var(--space-6);
    margin-bottom: var(--space-4);
}

.legal-section li {
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: var(--space-2);
}

.legal-section a {
    color: var(--primary-600);
    text-decoration: none;
}

.legal-section a:hover {
    text-decoration: underline;
}

.legal-section strong {
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .legal-content {
        padding: var(--space-6);
        border-radius: var(--radius-lg);
    }
    
    .legal-content h1 {
        font-size: 1.5rem;
    }
}

/* ===========================
   Ad Slots
   =========================== */
.ad-container {
    max-width: 800px;
    margin: var(--space-8) auto;
    padding: 0 var(--space-6);
}

.ad-slot {
    background: var(--bg-tertiary);
    border: 1px dashed var(--border-medium);
    border-radius: var(--radius-lg);
    padding: var(--space-6);
    text-align: center;
    min-height: 100px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.ad-label {
    font-size: 0.6875rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--space-2);
}

.ad-slot-content {
    color: var(--text-tertiary);
    font-size: 0.8125rem;
}

/* When actual ads are loaded, hide the placeholder */
.ad-slot:has(ins.adsbygoogle[data-ad-status="filled"]) .ad-label,
.ad-slot:has(ins.adsbygoogle[data-ad-status="filled"]) .ad-slot-content {
    display: none;
}

.ad-slot ins.adsbygoogle {
    display: block;
    width: 100%;
}

@media (max-width: 768px) {
    .ad-container {
        padding: 0 var(--space-4);
        margin: var(--space-6) auto;
    }
    
    .ad-slot {
        min-height: 80px;
        padding: var(--space-4);
    }
}