/* ============================================
   COMMA — Marketing Website Styles
   ============================================ */

:root {
    /* Brand Colors */
    --green-500: #4CAF50;
    --green-600: #43A047;
    --green-700: #2E7D32;
    --green-400: #66BB6A;
    --green-300: #81C784;
    --green-100: #E8F5E9;
    --green-50: #F1F8E9;

    /* Neutrals */
    --slate-900: #0f172a;
    --slate-800: #1e293b;
    --slate-700: #334155;
    --slate-600: #475569;
    --slate-500: #64748b;
    --slate-400: #94a3b8;
    --slate-300: #cbd5e1;
    --slate-200: #e2e8f0;
    --slate-100: #f1f5f9;
    --slate-50: #f8fafc;
    --white: #ffffff;

    /* Typography */
    --font-display: 'Instrument Serif', Georgia, serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    --space-4xl: 6rem;
    --space-5xl: 8rem;

    /* Layout */
    --max-width: 1200px;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 20px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
}

/* ============================================
   RESET & BASE
   ============================================ */

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    color: var(--slate-700);
    background: var(--white);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

img {
    max-width: 100%;
    height: auto;
}

/* ============================================
   GRID BACKGROUND
   ============================================ */

.grid-bg {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: -1;
    background-image:
        linear-gradient(to right, var(--slate-200) 1px, transparent 1px),
        linear-gradient(to bottom, var(--slate-200) 1px, transparent 1px);
    background-size: 60px 60px;
    opacity: 0.4;
    mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
}

/* ============================================
   NAVIGATION
   ============================================ */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    padding: var(--space-md) var(--space-xl);
    background: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--slate-200);
    transition: all var(--transition-base);
}

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

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--slate-900);
    transition: color var(--transition-fast);
}

.logo:hover {
    color: var(--green-600);
}

.logo-mark {
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--green-500);
    line-height: 0.6;
    transform: translateY(2px);
}

.logo-text {
    font-weight: 400;
}

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

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--slate-600);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--slate-900);
}

.nav-cta {
    padding: var(--space-sm) var(--space-lg) !important;
    background: var(--slate-900);
    color: var(--white) !important;
    border-radius: 100px;
    transition: all var(--transition-fast) !important;
}

.nav-cta:hover {
    background: var(--green-600) !important;
    color: var(--white) !important;
    transform: translateY(-1px);
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    min-height: 100vh;
    padding: calc(80px + var(--space-4xl)) var(--space-xl) var(--space-4xl);
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
    max-width: var(--max-width);
    margin: 0 auto;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-xs) var(--space-md);
    background: var(--green-50);
    border: 1px solid var(--green-200, #C8E6C9);
    border-radius: 100px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--green-700);
    margin-bottom: var(--space-xl);
}

.badge-dot {
    width: 6px;
    height: 6px;
    background: var(--green-500);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 400;
    line-height: 1.1;
    color: var(--slate-900);
    margin-bottom: var(--space-lg);
}

.title-line {
    display: block;
}

.title-accent {
    font-style: italic;
}

.comma-accent {
    color: var(--green-500);
    font-style: normal;
}

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--slate-600);
    max-width: 480px;
    margin-bottom: var(--space-2xl);
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--green-500);
    color: var(--white);
    box-shadow: 0 4px 14px rgba(76, 175, 80, 0.35);
}

.btn-primary:hover {
    background: var(--green-600);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: var(--slate-100);
    color: var(--slate-700);
}

.btn-secondary:hover {
    background: var(--slate-200);
}

/* Hero Visual - App Preview */
.hero-visual {
    animation: fadeInUp 0.8s ease-out 0.2s backwards;
}

.app-preview {
    background: var(--white);
    border-radius: var(--border-radius-lg);
    box-shadow:
        0 4px 6px rgba(0, 0, 0, 0.02),
        0 12px 24px rgba(0, 0, 0, 0.06),
        0 24px 48px rgba(0, 0, 0, 0.06);
    border: 1px solid var(--slate-200);
    overflow: hidden;
    transform: perspective(1000px) rotateY(-5deg) rotateX(2deg);
    transition: transform var(--transition-slow);
}

.app-preview:hover {
    transform: perspective(1000px) rotateY(-2deg) rotateX(1deg);
}

.preview-titlebar {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) var(--space-md);
    background: var(--slate-100);
    border-bottom: 1px solid var(--slate-200);
}

.titlebar-dots {
    display: flex;
    gap: 6px;
}

.titlebar-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--slate-300);
}

.titlebar-dots span:first-child { background: #FF5F56; }
.titlebar-dots span:nth-child(2) { background: #FFBD2E; }
.titlebar-dots span:last-child { background: #27CA40; }

.titlebar-text {
    font-size: 0.75rem;
    color: var(--slate-500);
    flex: 1;
    text-align: center;
}

.preview-toolbar {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--slate-50);
    border-bottom: 1px solid var(--slate-200);
}

.toolbar-btn {
    padding: var(--space-xs) var(--space-md);
    background: var(--green-500);
    color: var(--white);
    font-size: 0.7rem;
    font-weight: 500;
    border-radius: 4px;
}

.toolbar-divider {
    width: 1px;
    height: 20px;
    background: var(--slate-300);
    margin: 0 var(--space-xs);
}

.toolbar-icon {
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.85rem;
    color: var(--slate-500);
    background: var(--white);
    border: 1px solid var(--slate-200);
    border-radius: 4px;
}

.preview-grid {
    font-size: 0.75rem;
}

.grid-header {
    display: grid;
    grid-template-columns: 40px 1fr 1.5fr 80px;
    background: var(--slate-100);
    border-bottom: 1px solid var(--slate-200);
    font-weight: 600;
    color: var(--slate-600);
}

.grid-row {
    display: grid;
    grid-template-columns: 40px 1fr 1.5fr 80px;
    border-bottom: 1px solid var(--slate-100);
    transition: background var(--transition-fast);
}

.grid-row:hover {
    background: var(--slate-50);
}

.row-selected {
    background: var(--green-50) !important;
    border-left: 3px solid var(--green-500);
}

.cell {
    padding: var(--space-sm) var(--space-md);
    border-right: 1px solid var(--slate-100);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cell-num {
    color: var(--slate-400);
    text-align: center;
    background: var(--slate-50);
}

.cell-dim {
    color: var(--slate-500);
}

.cell-editing {
    background: var(--white);
    box-shadow: inset 0 0 0 2px var(--green-500);
    border-radius: 2px;
}

.cursor {
    animation: blink 1s infinite;
    color: var(--green-600);
}

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.status {
    display: inline-block;
    padding: 2px 8px;
    border-radius: 100px;
    font-size: 0.65rem;
    font-weight: 500;
}

.status.active {
    background: var(--green-100);
    color: var(--green-700);
}

.status.pending {
    background: #FFF3E0;
    color: #E65100;
}

/* ============================================
   SECTION COMMON STYLES
   ============================================ */

.section-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.section-tag {
    display: inline-block;
    padding: var(--space-xs) var(--space-md);
    background: var(--green-100);
    color: var(--green-700);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-radius: 100px;
    margin-bottom: var(--space-md);
}

.section-tag-light {
    background: rgba(255, 255, 255, 0.15);
    color: var(--white);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 400;
    line-height: 1.2;
    color: var(--slate-900);
}

.section-title em {
    font-style: italic;
}

.section-title-light {
    color: var(--white);
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--slate-50);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    max-width: var(--max-width);
    margin: 0 auto;
}

.feature-card {
    background: var(--white);
    padding: var(--space-2xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--slate-200);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 32px rgba(0, 0, 0, 0.08);
    border-color: var(--green-300);
}

.feature-icon {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--green-100);
    color: var(--green-600);
    border-radius: var(--border-radius);
    margin-bottom: var(--space-lg);
}

.feature-icon svg {
    width: 24px;
    height: 24px;
}

.feature-card h3 {
    font-family: var(--font-body);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--slate-900);
    margin-bottom: var(--space-sm);
}

.feature-card p {
    font-size: 0.9rem;
    color: var(--slate-600);
    line-height: 1.6;
}

/* ============================================
   LIGHTWEIGHT SECTION
   ============================================ */

.lightweight {
    padding: var(--space-5xl) var(--space-xl);
    background: var(--white);
}

.lightweight-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-4xl);
    align-items: center;
}

.lightweight-content .section-tag {
    margin-bottom: var(--space-md);
}

.lightweight-content .section-title {
    margin-bottom: var(--space-lg);
}

.lightweight-desc {
    font-size: 1.1rem;
    color: var(--slate-600);
    line-height: 1.7;
}

.stats-grid {
    display: grid;
    gap: var(--space-lg);
}

.stat-card {
    background: var(--slate-50);
    padding: var(--space-xl) var(--space-2xl);
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--slate-200);
    position: relative;
    overflow: hidden;
}

.stat-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--green-500);
}

.stat-value {
    font-family: var(--font-display);
    font-size: 3rem;
    font-weight: 400;
    color: var(--slate-900);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-prefix,
.stat-suffix {
    font-size: 1.5rem;
    color: var(--green-500);
}

.stat-label {
    font-size: 1rem;
    font-weight: 600;
    color: var(--slate-700);
    margin-bottom: var(--space-xs);
}

.stat-detail {
    font-size: 0.85rem;
    color: var(--slate-500);
}

/* ============================================
   DOWNLOAD SECTION
   ============================================ */

.download {
    padding: var(--space-5xl) var(--space-xl);
    background: linear-gradient(135deg, var(--slate-900) 0%, var(--slate-800) 100%);
    position: relative;
    overflow: hidden;
}

.download::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, var(--green-500) 0%, transparent 70%);
    opacity: 0.1;
    pointer-events: none;
}

.download-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
    z-index: 1;
}

.download-header {
    text-align: center;
    margin-bottom: var(--space-4xl);
}

.download-subtitle {
    font-size: 1.1rem;
    color: var(--slate-400);
    margin-top: var(--space-md);
}

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

.platform-group {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius-lg);
    padding: var(--space-2xl);
    transition: all var(--transition-base);
}

.platform-group:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--green-500);
}

.platform-label {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1rem;
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--space-lg);
}

.platform-label svg {
    opacity: 0.7;
}

.platform-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.download-btn {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--green-500);
    color: var(--white);
    border-radius: var(--border-radius);
    transition: all var(--transition-fast);
}

.download-btn:hover {
    background: var(--green-400);
    transform: translateY(-2px);
}

.download-btn-alt {
    background: transparent;
    border: 1px solid var(--slate-600);
    color: var(--slate-300);
}

.download-btn-alt:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--slate-500);
    color: var(--white);
}

.download-btn-arch {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    padding: var(--space-xs) var(--space-sm);
    background: rgba(0, 0, 0, 0.2);
    border-radius: 4px;
}

.download-btn-alt .download-btn-arch {
    background: rgba(255, 255, 255, 0.1);
}

.download-btn-label {
    font-size: 0.9rem;
}

.download-footer {
    text-align: center;
    margin-top: var(--space-3xl);
}

.download-footer p {
    font-size: 0.85rem;
    color: var(--slate-500);
}

.download-footer a {
    color: var(--green-400);
    text-decoration: underline;
    text-underline-offset: 2px;
}

.download-footer a:hover {
    color: var(--green-300);
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    padding: var(--space-2xl) var(--space-xl);
    background: var(--slate-900);
    border-top: 1px solid var(--slate-800);
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: var(--space-lg);
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: var(--space-xs);
    font-family: var(--font-display);
    font-size: 1.25rem;
    color: var(--white);
}

.footer-brand .logo-mark {
    font-size: 2rem;
    color: var(--green-500);
}

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

.footer-links a {
    font-size: 0.85rem;
    color: var(--slate-400);
    transition: color var(--transition-fast);
}

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

.footer-copyright {
    font-size: 0.8rem;
    color: var(--slate-500);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    .hero {
        grid-template-columns: 1fr;
        gap: var(--space-3xl);
        text-align: center;
    }

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

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

    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }

    .app-preview {
        transform: none;
    }

    .app-preview:hover {
        transform: none;
    }

    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .lightweight-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .stats-grid {
        grid-template-columns: repeat(3, 1fr);
    }

    .download-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    .nav-links a:not(.nav-cta) {
        display: none;
    }

    .hero {
        padding-top: calc(70px + var(--space-3xl));
        min-height: auto;
    }

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

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

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

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

@media (max-width: 480px) {
    :root {
        --space-xl: 1.5rem;
        --space-2xl: 2rem;
        --space-3xl: 2.5rem;
        --space-4xl: 3.5rem;
        --space-5xl: 5rem;
    }

    .hero-actions {
        flex-direction: column;
        width: 100%;
    }

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

    .stat-value {
        font-size: 2.5rem;
    }

    .platform-buttons {
        gap: var(--space-md);
    }
}

/* ============================================
   ANIMATIONS ON SCROLL
   ============================================ */

.feature-card,
.stat-card,
.platform-group {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.feature-card.visible,
.stat-card.visible,
.platform-group.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation delays */
.feature-card:nth-child(1) { transition-delay: 0s; }
.feature-card:nth-child(2) { transition-delay: 0.1s; }
.feature-card:nth-child(3) { transition-delay: 0.2s; }
.feature-card:nth-child(4) { transition-delay: 0.3s; }
.feature-card:nth-child(5) { transition-delay: 0.4s; }
.feature-card:nth-child(6) { transition-delay: 0.5s; }

.stat-card:nth-child(1) { transition-delay: 0s; }
.stat-card:nth-child(2) { transition-delay: 0.15s; }
.stat-card:nth-child(3) { transition-delay: 0.3s; }

.platform-group:nth-child(1) { transition-delay: 0s; }
.platform-group:nth-child(2) { transition-delay: 0.1s; }
.platform-group:nth-child(3) { transition-delay: 0.2s; }