/* WordTools - Professional Design System */

:root {
    /* Brand Colors */
    --brand-primary: #6366f1;
    --brand-secondary: #8b5cf6;
    --brand-accent: #a855f7;
    --brand-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 50%, #a855f7 100%);
    
    /* Dark Theme - Default */
    --bg-body: #09090b;
    --bg-primary: #0f0f12;
    --bg-secondary: #18181b;
    --bg-tertiary: #27272a;
    --bg-elevated: #1f1f23;
    --bg-card: rgba(24, 24, 27, 0.9);
    
    --text-primary: #fafafa;
    --text-secondary: #a1a1aa;
    --text-muted: #71717a;
    --text-inverse: #09090b;
    
    --border-primary: rgba(255, 255, 255, 0.08);
    --border-secondary: rgba(255, 255, 255, 0.04);
    --border-focus: rgba(99, 102, 241, 0.5);
    
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    --success: #22c55e;
    --warning: #eab308;
    --error: #ef4444;
    --info: #3b82f6;
    
    /* Spacing Scale */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.25rem;
    --space-6: 1.5rem;
    --space-8: 2rem;
    --space-10: 2.5rem;
    --space-12: 3rem;
    --space-16: 4rem;
    
    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-2xl: 24px;
    --radius-full: 9999px;
    
    /* Typography */
    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'SF Mono', 'Fira Code', monospace;
    
    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --duration-fast: 150ms;
    --duration-normal: 250ms;
    --duration-slow: 350ms;
}

/* Light Theme */
.light-theme {
    --bg-body: #f4f4f5;
    --bg-primary: #ffffff;
    --bg-secondary: #fafafa;
    --bg-tertiary: #f4f4f5;
    --bg-elevated: #ffffff;
    --bg-card: rgba(255, 255, 255, 0.95);
    
    --text-primary: #18181b;
    --text-secondary: #52525b;
    --text-muted: #a1a1aa;
    --text-inverse: #fafafa;
    
    --border-primary: rgba(0, 0, 0, 0.08);
    --border-secondary: rgba(0, 0, 0, 0.04);
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-body);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* App Layout */
.app-wrapper {
    display: flex;
    justify-content: center;
    gap: var(--space-4);
    padding: 0 var(--space-4);
}

.app-container {
    flex: 1;
    max-width: 1200px;
    min-width: 0;
}

/* Header */
.header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--space-4) 0;
    border-bottom: 1px solid var(--border-primary);
    margin-bottom: var(--space-6);
}

.header-brand {
    display: flex;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

.logo-icon {
    width: 40px;
    height: 40px;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1.2;
}

.logo-tagline {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.header-nav {
    display: flex;
    gap: var(--space-1);
}

.nav-link {
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius-md);
    transition: all var(--duration-fast) var(--ease-out);
}

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

.nav-link.active {
    color: var(--brand-primary);
    background: rgba(99, 102, 241, 0.1);
}

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

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    background: var(--bg-secondary);
    color: var(--text-primary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--border-focus);
}

.btn-primary {
    background: var(--brand-gradient);
    border-color: transparent;
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.4);
}

.btn-ghost {
    background: transparent;
    border-color: transparent;
}

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

.btn-sm {
    padding: var(--space-1) var(--space-3);
    font-size: 0.8125rem;
}

.btn-icon {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: var(--radius-md);
}

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

.icon-sun.hidden,
.light-theme .icon-moon {
    display: none;
}

.light-theme .icon-sun {
    display: block;
}

/* Hero Stats Bar */
.hero-stats {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-6);
    padding: var(--space-6);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-6);
}

.stat-pill {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-1);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    background: var(--brand-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1;
}

.stat-text {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--border-primary);
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 340px;
    gap: var(--space-6);
    margin-bottom: var(--space-6);
}

/* Editor Panel */
.editor-panel {
    display: flex;
    flex-direction: column;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-4);
}

.panel-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.panel-title .icon {
    color: var(--brand-primary);
}

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

.editor-wrapper {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color var(--duration-fast) var(--ease-out);
}

.editor-wrapper:focus-within {
    border-color: var(--brand-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

#textInput {
    flex: 1;
    min-height: 320px;
    padding: var(--space-5);
    font-family: var(--font-sans);
    font-size: 1rem;
    line-height: 1.75;
    color: var(--text-primary);
    background: transparent;
    border: none;
    resize: vertical;
}

#textInput:focus {
    outline: none;
}

#textInput::placeholder {
    color: var(--text-muted);
}

.editor-footer {
    padding: var(--space-3) var(--space-5);
    border-top: 1px solid var(--border-secondary);
    background: var(--bg-tertiary);
}

.editor-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Cards */
.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.card-header {
    padding: var(--space-4) var(--space-5);
    border-bottom: 1px solid var(--border-secondary);
}

.card-title {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-title .icon {
    color: var(--brand-primary);
}

.card-body {
    padding: var(--space-5);
}

.card-accent {
    border-color: var(--brand-primary);
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

/* Details Panel */
.details-panel {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4);
}

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

.detail-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.detail-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Reading Level */
.reading-level-display {
    text-align: center;
    margin-bottom: var(--space-4);
}

.reading-grade {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--brand-primary);
    margin-bottom: var(--space-1);
}

.reading-desc {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.reading-meter {
    margin-top: var(--space-3);
}

.meter-track {
    height: 8px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.meter-fill {
    height: 100%;
    background: var(--brand-gradient);
    border-radius: var(--radius-full);
    transition: width var(--duration-normal) var(--ease-out);
}

.meter-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--space-2);
    font-size: 0.6875rem;
    color: var(--text-muted);
}

/* Tools Section */
.tools-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-4);
    margin-bottom: var(--space-5);
}

.section-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1.125rem;
    font-weight: 600;
}

.section-title .icon {
    color: var(--brand-primary);
}

.tools-tabs-wrapper {
    overflow-x: auto;
    margin: 0 calc(-1 * var(--space-6));
    padding: 0 var(--space-6);
    margin-bottom: var(--space-5);
}

.tools-tabs {
    display: flex;
    gap: var(--space-2);
    padding-bottom: var(--space-2);
}

.tool-tab {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-4);
    font-size: 0.875rem;
    font-weight: 500;
    font-family: inherit;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
    white-space: nowrap;
}

.tool-tab .icon {
    width: 16px;
    height: 16px;
}

.tool-tab:hover {
    color: var(--text-primary);
    background: var(--bg-elevated);
    border-color: var(--border-focus);
}

.tool-tab.active {
    background: var(--brand-gradient);
    border-color: transparent;
    color: white;
}

.tool-tab.active .icon {
    color: white;
}

.tools-content {
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-lg);
    padding: var(--space-5);
}

.tool-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: var(--space-3);
}

.tool-buttons.hidden {
    display: none;
}

.tool-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-4);
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.tool-btn:hover {
    background: var(--bg-tertiary);
    border-color: var(--brand-primary);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.15);
}

.tool-btn .tool-icon {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--brand-primary);
}

.tool-btn .tool-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-align: center;
}

.tool-btn:hover .tool-name {
    color: var(--text-primary);
}

.tool-btn-accent {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(139, 92, 246, 0.1) 100%);
    border-color: rgba(99, 102, 241, 0.3);
}

/* Keyword Section */
.keyword-section {
    background: var(--bg-secondary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    margin-bottom: var(--space-6);
}

.keyword-tabs {
    display: flex;
    gap: var(--space-2);
}

.kw-tab {
    padding: var(--space-2) var(--space-4);
    font-size: 0.8125rem;
    font-weight: 500;
    font-family: inherit;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--duration-fast) var(--ease-out);
}

.kw-tab:hover,
.kw-tab.active {
    background: var(--brand-primary);
    border-color: transparent;
    color: white;
}

.keyword-content {
    min-height: 100px;
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-top: var(--space-5);
}

.keyword-item {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-3) var(--space-4);
    background: var(--bg-primary);
    border: 1px solid var(--border-secondary);
    border-radius: var(--radius-md);
}

.keyword-item .keyword {
    font-weight: 600;
    color: var(--text-primary);
}

.keyword-item .count {
    font-size: 0.75rem;
    font-weight: 600;
    padding: var(--space-1) var(--space-2);
    background: var(--brand-gradient);
    border-radius: var(--radius-sm);
    color: white;
}

.keyword-item .density {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.empty-state {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-3);
    padding: var(--space-8);
    color: var(--text-muted);
    text-align: center;
}

.empty-icon {
    width: 48px;
    height: 48px;
    opacity: 0.5;
}

/* Advertisement Containers */
.ad-container {
    display: flex;
    justify-content: center;
    padding: var(--space-4) 0;
}

.ad-top {
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-secondary);
}

.ad-bottom {
    margin-top: var(--space-4);
}

.ad-inline {
    padding: 0;
}

.ad-sidebar {
    position: sticky;
    top: var(--space-4);
    height: fit-content;
    display: none;
}

.ad-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    background: var(--bg-secondary);
    border: 2px dashed var(--border-primary);
    border-radius: var(--radius-md);
    color: var(--text-muted);
}

.ad-label {
    font-size: 0.625rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    opacity: 0.6;
}

.ad-size {
    font-size: 0.75rem;
    font-weight: 500;
}

.ad-leaderboard {
    width: 728px;
    max-width: 100%;
    height: 90px;
}

.ad-rectangle {
    width: 300px;
    height: 250px;
}

.ad-skyscraper {
    width: 160px;
    height: 600px;
}

@media (min-width: 1600px) {
    .ad-sidebar {
        display: block;
    }
}

/* Footer */
.footer {
    border-top: 1px solid var(--border-primary);
    padding-top: var(--space-12);
    margin-top: var(--space-8);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    gap: var(--space-8);
    margin-bottom: var(--space-8);
}

.footer-brand {
    max-width: 280px;
}

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

.footer-desc {
    margin-top: var(--space-3);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
}

.footer-col a {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    text-decoration: none;
    padding: var(--space-1) 0;
    transition: color var(--duration-fast) var(--ease-out);
}

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

.footer-bottom {
    padding: var(--space-6) 0;
    border-top: 1px solid var(--border-secondary);
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Toast Notifications */
.toast {
    position: fixed;
    bottom: var(--space-6);
    right: var(--space-6);
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-4) var(--space-5);
    background: var(--bg-elevated);
    border: 1px solid var(--border-primary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-xl);
    font-size: 0.875rem;
    color: var(--text-primary);
    transform: translateY(100px);
    opacity: 0;
    transition: all var(--duration-normal) var(--ease-out);
    z-index: 1000;
}

.toast.show {
    transform: translateY(0);
    opacity: 1;
}

.toast.success {
    border-left: 3px solid var(--success);
}

.toast.error {
    border-left: 3px solid var(--error);
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* Selection */
::selection {
    background: var(--brand-primary);
    color: white;
}

/* Responsive */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .header-nav {
        display: none;
    }
    
    .hero-stats {
        flex-wrap: wrap;
        gap: var(--space-4);
    }
    
    .stat-divider {
        display: none;
    }
    
    .footer-content {
        flex-direction: column;
    }
    
    .footer-links {
        flex-wrap: wrap;
        gap: var(--space-8);
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 0 var(--space-4);
    }
    
    .hero-stats {
        padding: var(--space-4);
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .tools-section,
    .keyword-section {
        padding: var(--space-4);
    }
    
    .section-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .tool-buttons {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .ad-leaderboard {
        width: 320px;
        height: 100px;
    }
    
    .keyword-tabs {
        flex-wrap: wrap;
    }
}

@media (max-width: 480px) {
    .hero-stats {
        justify-content: space-around;
    }
    
    .stat-pill {
        min-width: 70px;
    }
    
    .tool-buttons {
        grid-template-columns: 1fr 1fr;
    }
    
    .tool-btn {
        padding: var(--space-3);
    }
    
    .footer-links {
        gap: var(--space-6);
    }
}

/* Page Hero Section */
.page-hero {
    text-align: center;
    padding: var(--space-8) 0;
    margin-bottom: var(--space-6);
}

.page-title {
    display: inline-flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: var(--space-3);
}

.page-title .icon {
    width: 32px;
    height: 32px;
    color: var(--brand-primary);
}

.page-desc {
    font-size: 1.125rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* Character Limits */
.limits-container {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.limit-item {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

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

.limit-name {
    font-size: 0.8125rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.limit-count {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-primary);
}

.limit-count.over-limit {
    color: var(--error);
}

.limit-bar {
    height: 6px;
    background: var(--bg-tertiary);
    border-radius: var(--radius-full);
    overflow: hidden;
}

.limit-fill {
    height: 100%;
    background: var(--brand-gradient);
    border-radius: var(--radius-full);
    transition: width var(--duration-normal) var(--ease-out), background var(--duration-fast);
}

/* Full Width Editor for Text Tools */
.main-content-full {
    display: block;
    margin-bottom: var(--space-6);
}

.editor-panel-full {
    width: 100%;
}

.editor-panel-full #textInput {
    min-height: 250px;
}

/* Tool Categories for Text Tools Page */
.tool-category {
    margin-bottom: var(--space-8);
}

.tool-category:last-child {
    margin-bottom: 0;
}

.category-title {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--space-4);
    padding-bottom: var(--space-3);
    border-bottom: 1px solid var(--border-secondary);
}

.category-title .icon {
    width: 20px;
    height: 20px;
    color: var(--brand-primary);
}

/* Large stat highlight */
.stat-large .stat-number {
    font-size: 2.5rem;
}

/* Links */
a {
    text-decoration: none;
    color: inherit;
}

/* PDF Tool Styles */
.pdf-workspace {
    max-width: 800px;
    margin: 0 auto;
    background: var(--surface-color);
    border-radius: 20px;
    padding: 2rem;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
}

.upload-zone {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 3rem;
    text-align: center;
    background: rgba(255, 255, 255, 0.02);
    transition: all 0.3s ease;
    cursor: pointer;
}

.upload-zone:hover, .upload-zone.drag-over {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.05);
}

.upload-icon {
    color: var(--primary-color);
    margin-bottom: 1.5rem;
}

.upload-text h3 {
    margin-bottom: 0.5rem;
    font-size: 1.25rem;
}

.upload-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.file-list {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.file-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: var(--bg-color);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    animation: slideDown 0.3s ease;
}

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

.file-icon {
    color: #ef4444; /* PDF Red */
}

.file-name {
    font-weight: 500;
    max-width: 300px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.file-size {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 0.5rem;
    transition: color 0.2s;
}

.btn-remove:hover {
    color: #ef4444;
}

.action-area {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
}

.privacy-notice {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.05);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    margin-top: 1rem;
}

.nav-separator {
    margin: 0 0.5rem;
    color: var(--text-secondary);
}

.nav-current {
    font-weight: 600;
    color: var(--text-primary);
}

@keyframes slideDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}