/* ===== CSS VARIABLES & DESIGN TOKENS ===== */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);
    --bg-glass: rgba(255, 255, 255, 0.05);
    --bg-glass-hover: rgba(255, 255, 255, 0.08);
    
    --text-primary: #f0f0f5;
    --text-secondary: #8b8b9e;
    --text-muted: #55556a;
    
    --accent-1: #6c5ce7;
    --accent-2: #a29bfe;
    --accent-3: #fd79a8;
    --accent-4: #00b894;
    --accent-5: #fdcb6e;
    
    --gradient-primary: linear-gradient(135deg, #6c5ce7, #a29bfe, #fd79a8);
    --gradient-card: linear-gradient(135deg, rgba(108, 92, 231, 0.1), rgba(253, 121, 168, 0.05));
    --gradient-glow: radial-gradient(circle, rgba(108, 92, 231, 0.15), transparent 70%);
    
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-accent: rgba(108, 92, 231, 0.3);
    
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 16px 64px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 30px rgba(108, 92, 231, 0.2);
    
    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    /* Spacing */
    --section-padding: 6rem 2rem;
    --container-max: 1200px;
    
    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --radius-full: 9999px;
}

/* ===== RESET & BASE ===== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-primary);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
}

ul, ol {
    list-style: none;
}

img {
    max-width: 100%;
    display: block;
}

code {
    font-family: var(--font-mono);
    background: rgba(108, 92, 231, 0.15);
    padding: 0.15em 0.4em;
    border-radius: 4px;
    font-size: 0.85em;
    color: var(--accent-2);
}

/* ===== AMBIENT BACKGROUND ===== */
.ambient-bg {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(108, 92, 231, 0.3), transparent);
    top: -10%;
    left: -10%;
    animation-delay: 0s;
}

.orb-2 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(253, 121, 168, 0.2), transparent);
    bottom: -10%;
    right: -10%;
    animation-delay: -7s;
}

.orb-3 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(0, 184, 148, 0.15), transparent);
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    animation-delay: -14s;
}

@keyframes orbFloat {
    0%, 100% { transform: translate(0, 0) scale(1); }
    25% { transform: translate(50px, -30px) scale(1.1); }
    50% { transform: translate(-30px, 50px) scale(0.9); }
    75% { transform: translate(30px, 30px) scale(1.05); }
}

/* ===== NAVBAR ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.8rem 0;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-subtle);
    box-shadow: var(--shadow-sm);
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 800;
    font-size: 1.3rem;
    letter-spacing: -0.02em;
}

.logo-icon {
    font-size: 1.5rem;
}

.logo-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    padding: 0.5rem 1rem;
    border-radius: var(--radius-full);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
    position: relative;
}

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

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: var(--accent-1);
}

.mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.mobile-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-fast);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 60px;
    left: 0;
    right: 0;
    background: rgba(10, 10, 15, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 2rem 2rem;
    z-index: 999;
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    gap: 0.5rem;
    transform: translateY(-20px);
    opacity: 0;
    transition: var(--transition-smooth);
}

.mobile-menu.open {
    display: flex;
    transform: translateY(0);
    opacity: 1;
}

.mobile-link {
    padding: 0.8rem 1rem;
    border-radius: var(--radius-md);
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

/* ===== HERO ===== */
.hero {
    position: relative;
    z-index: 1;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8rem 2rem 4rem;
    gap: 4rem;
    max-width: var(--container-max);
    margin: 0 auto;
}

.hero-content {
    flex: 1;
    max-width: 600px;
}

.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
}

.hero-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out 0.1s both;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    line-height: 1.7;
    margin-bottom: 2rem;
    max-width: 500px;
    animation: fadeInUp 0.8s ease-out 0.2s both;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    margin-bottom: 3rem;
    animation: fadeInUp 0.8s ease-out 0.3s both;
}

.hero-stats {
    display: flex;
    align-items: center;
    gap: 2rem;
    animation: fadeInUp 0.8s ease-out 0.4s both;
}

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

.stat-number {
    font-size: 1.8rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

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

/* Hero Visual */
.hero-visual {
    flex: 1;
    position: relative;
    height: 400px;
    max-width: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.floating-card {
    position: absolute;
    padding: 1rem 1.5rem;
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 0.8rem;
    box-shadow: var(--shadow-md);
    animation: float 6s ease-in-out infinite;
    white-space: nowrap;
}

.floating-card .card-emoji {
    font-size: 1.4rem;
}

.floating-card .card-text {
    font-weight: 600;
    font-size: 0.9rem;
}

.card-1 {
    top: 10%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 35%;
    right: 5%;
    animation-delay: -1.5s;
}

.card-3 {
    bottom: 25%;
    left: 5%;
    animation-delay: -3s;
}

.card-4 {
    bottom: 5%;
    right: 15%;
    animation-delay: -4.5s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-15px); }
}

/* ===== BUTTONS ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.8rem 1.8rem;
    border-radius: var(--radius-full);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    border: none;
    transition: var(--transition-fast);
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #fff;
    box-shadow: 0 4px 20px rgba(108, 92, 231, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(108, 92, 231, 0.4);
}

.btn-secondary {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
    backdrop-filter: blur(10px);
}

.btn-secondary:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-accent);
    transform: translateY(-2px);
}

.btn-icon {
    font-size: 1.1rem;
}

.btn-small {
    padding: 0.5rem 1.2rem;
    font-size: 0.85rem;
}

/* ===== SECTIONS ===== */
.section {
    position: relative;
    z-index: 1;
    padding: var(--section-padding);
}

.section-dark {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    border-bottom: 1px solid var(--border-subtle);
}

.section-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-badge {
    display: inline-block;
    padding: 0.4rem 1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.section-title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 800;
    letter-spacing: -0.02em;
    margin-bottom: 0.8rem;
}

.section-subtitle {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 550px;
    margin: 0 auto;
    line-height: 1.6;
}

/* ===== SEARCH & FILTER ===== */
.search-bar {
    margin-bottom: 1.5rem;
}

.search-input-wrapper {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-icon {
    position: absolute;
    left: 1.2rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.1rem;
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 1rem 3rem 1rem 3.2rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-primary);
    font-family: var(--font-primary);
    font-size: 0.95rem;
    outline: none;
    transition: var(--transition-fast);
}

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

.search-input:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(108, 92, 231, 0.15);
}

.search-clear {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1rem;
    padding: 0.3rem;
    opacity: 0;
    transition: var(--transition-fast);
}

.search-clear.visible {
    opacity: 1;
}

.search-clear:hover {
    color: var(--text-primary);
}

.filter-bar {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-bottom: 2.5rem;
}

.filter-chip {
    padding: 0.45rem 1.1rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-full);
    color: var(--text-secondary);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.filter-chip:hover {
    background: var(--bg-glass-hover);
    color: var(--text-primary);
}

.filter-chip.active {
    background: rgba(108, 92, 231, 0.2);
    border-color: var(--accent-1);
    color: var(--accent-2);
}

/* ===== NOTES GRID ===== */
.notes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: 1.5rem;
}

.note-card {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition-smooth);
    cursor: default;
    position: relative;
    overflow: hidden;
    animation: fadeInUp 0.5s ease-out both;
}

.note-card::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--gradient-card);
    opacity: 0;
    transition: var(--transition-smooth);
}

.note-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.note-card:hover::before {
    opacity: 1;
}

.note-card-content {
    position: relative;
    z-index: 1;
}

.note-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.note-subject-badge {
    padding: 0.3rem 0.8rem;
    background: rgba(108, 92, 231, 0.15);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-2);
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.note-file-type {
    padding: 0.25rem 0.6rem;
    background: rgba(0, 184, 148, 0.15);
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-4);
    font-family: var(--font-mono);
    text-transform: uppercase;
}

.note-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
}

.note-description {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.5;
    margin-bottom: 1rem;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.note-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

.note-meta-item {
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

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

.note-btn {
    flex: 1;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-md);
    font-family: var(--font-primary);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition-fast);
    text-decoration: none;
}

.note-btn-download {
    background: var(--gradient-primary);
    color: #fff;
}

.note-btn-download:hover {
    box-shadow: 0 4px 15px rgba(108, 92, 231, 0.3);
    transform: translateY(-1px);
}

.note-btn-preview {
    background: var(--bg-glass);
    color: var(--text-primary);
    border: 1px solid var(--border-subtle);
}

.note-btn-preview:hover {
    background: var(--bg-glass-hover);
    border-color: var(--border-accent);
}

/* ===== LOADING STATE ===== */
.loading-state {
    text-align: center;
    padding: 4rem 2rem;
    color: var(--text-secondary);
}

.loader {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-subtle);
    border-top-color: var(--accent-1);
    border-radius: 50%;
    margin: 0 auto 1rem;
    animation: spin 0.8s linear infinite;
}

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

/* ===== EMPTY STATE ===== */
.empty-state, .setup-notice {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-icon, .setup-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state h3, .setup-notice h3 {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.empty-state p, .setup-notice p {
    color: var(--text-secondary);
    max-width: 400px;
    margin: 0 auto;
    line-height: 1.6;
}

.hidden {
    display: none !important;
}

/* ===== UPLOAD SECTION ===== */
.upload-container {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 2rem;
    align-items: start;
}

.upload-info {
    display: flex;
    flex-direction: column;
    gap: 1.2rem;
}

.info-card {
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition-fast);
}

.info-card:hover {
    border-color: var(--border-accent);
}

.info-icon {
    font-size: 1.8rem;
    margin-bottom: 0.8rem;
}

.info-card h3 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.6rem;
}

.info-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.info-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.info-list li {
    color: var(--text-secondary);
    font-size: 0.9rem;
    padding-left: 1.5rem;
    position: relative;
}

.info-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-1);
    font-weight: bold;
}

.format-grid {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-top: 0.3rem;
}

.format-tag {
    padding: 0.3rem 0.8rem;
    background: rgba(108, 92, 231, 0.12);
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent-2);
    font-family: var(--font-mono);
}

.upload-cta {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.upload-cta:hover {
    border-color: var(--border-accent);
    box-shadow: var(--shadow-glow);
}

.upload-cta-glow {
    position: absolute;
    inset: 0;
    background: radial-gradient(ellipse at center, rgba(108, 92, 231, 0.08), transparent 70%);
    pointer-events: none;
}

.upload-cta-content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 3.5rem 2.5rem;
}

.upload-cta-icon {
    position: relative;
    margin-bottom: 2rem;
}

.cta-icon-inner {
    font-size: 3.5rem;
    display: block;
    position: relative;
    z-index: 2;
}

.cta-icon-ring {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 100px;
    height: 100px;
    border-radius: 50%;
    border: 2px solid rgba(108, 92, 231, 0.2);
    animation: pulseRing 3s ease-in-out infinite;
}

.cta-icon-ring-2 {
    width: 140px;
    height: 140px;
    border-color: rgba(253, 121, 168, 0.12);
    animation-delay: -1.5s;
}

@keyframes pulseRing {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.6;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.15);
        opacity: 0.2;
    }
}

.upload-cta-title {
    font-size: 1.5rem;
    font-weight: 800;
    margin-bottom: 0.8rem;
    letter-spacing: -0.02em;
}

.upload-cta-text {
    color: var(--text-secondary);
    font-size: 1rem;
    line-height: 1.6;
    max-width: 420px;
    margin-bottom: 2rem;
}

.btn-large {
    padding: 1rem 2.5rem;
    font-size: 1.1rem;
}

.btn-arrow {
    font-size: 1.2rem;
    transition: var(--transition-fast);
}

.btn-large:hover .btn-arrow {
    transform: translate(3px, -3px);
}

.upload-cta-hint {
    margin-top: 1.2rem;
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== HOW IT WORKS ===== */
.steps-grid {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
}

.step-card {
    flex: 1;
    min-width: 250px;
    max-width: 320px;
    background: var(--bg-glass);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    padding: 2rem;
    text-align: center;
    transition: var(--transition-smooth);
    position: relative;
}

.step-card:hover {
    border-color: var(--border-accent);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.step-number {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 2.5rem;
    font-weight: 900;
    color: rgba(108, 92, 231, 0.08);
    line-height: 1;
}

.step-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.step-card h3 {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.step-card p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
}

.step-connector {
    font-size: 1.5rem;
    color: var(--text-muted);
    font-weight: bold;
}

/* ===== FOOTER ===== */
.footer {
    position: relative;
    z-index: 1;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-subtle);
    padding: 3rem 2rem 1.5rem;
}

.footer-container {
    max-width: var(--container-max);
    margin: 0 auto;
}

.footer-top {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.footer-brand .logo-icon {
    display: inline;
}

.footer-brand .logo-text {
    display: inline;
    font-size: 1.2rem;
    font-weight: 800;
}

.footer-tagline {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.2rem;
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
    color: var(--text-muted);
    font-size: 0.85rem;
}

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

.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for cards */
.note-card:nth-child(1) { animation-delay: 0s; }
.note-card:nth-child(2) { animation-delay: 0.05s; }
.note-card:nth-child(3) { animation-delay: 0.1s; }
.note-card:nth-child(4) { animation-delay: 0.15s; }
.note-card:nth-child(5) { animation-delay: 0.2s; }
.note-card:nth-child(6) { animation-delay: 0.25s; }
.note-card:nth-child(7) { animation-delay: 0.3s; }
.note-card:nth-child(8) { animation-delay: 0.35s; }
.note-card:nth-child(9) { animation-delay: 0.4s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding-top: 7rem;
        gap: 3rem;
    }

    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-visual {
        height: 280px;
        width: 100%;
        max-width: 500px;
    }

    .upload-container {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 1.5rem;
    }

    .nav-links {
        display: none;
    }

    .mobile-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.2rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 1rem;
    }

    .stat-divider {
        display: none;
    }

    .notes-grid {
        grid-template-columns: 1fr;
    }

    .steps-grid {
        flex-direction: column;
    }

    .step-connector {
        transform: rotate(90deg);
    }

    .floating-card {
        transform: scale(0.85);
    }

    .hero-visual {
        height: 220px;
    }

    .footer-top {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

    .btn {
        justify-content: center;
        width: 100%;
    }

    .filter-bar {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 0.5rem;
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    .filter-bar::-webkit-scrollbar {
        display: none;
    }

    .filter-chip {
        flex-shrink: 0;
    }
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-subtle);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.15);
}