/* ============================================== */
/* CSS DESIGN TOKENS (from app design system)    */
/* ============================================== */

:root {
    /* Background Colors */
    --bg-primary: #0D0D0D;
    --bg-secondary: #1A1A1A;
    --bg-card: #1A1A1A;
    --bg-elevated: #252525;

    /* Stroke/Border Colors */
    --stroke-default: #333333;
    --stroke-light: #444444;

    /* Accent Colors */
    --accent-blue: #2196F3;
    --accent-cyan: #4FC3F7;
    --accent-gold: #FFC107;
    --accent-red: #FF5252;

    /* Type Colors (JSON type indicators) */
    --type-object: #9C27B0;
    --type-array: #4CAF50;
    --type-string: #F59E0B;
    --type-number: #03A9F4;
    --type-boolean: #E91E63;
    --type-null: #9E9E9E;

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #888888;
    --text-tertiary: #666666;
    --text-muted: #555555;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 12px;
    --spacing-lg: 16px;
    --spacing-xl: 24px;
    --spacing-xxl: 32px;
    --spacing-xxxl: 48px;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.4s ease;

    /* Container */
    --container-max: 1200px;
}

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

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-weight: 600;
    line-height: 1.3;
}

h1 {
    font-size: 2.5rem;
}

h2 {
    font-size: 2rem;
}

h3 {
    font-size: 1.5rem;
}

h4 {
    font-size: 1.125rem;
}

p {
    color: var(--text-secondary);
}

a {
    color: var(--accent-cyan);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-blue);
}

ul {
    list-style: none;
}

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

/* ============================================== */
/* LAYOUT                                          */
/* ============================================== */

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 var(--spacing-xl);
}

.section {
    padding: var(--spacing-xxxl) 0;
}

.section-title {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xxl);
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ============================================== */
/* BUTTONS                                         */
/* ============================================== */

.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent-blue) 0%, var(--accent-cyan) 100%);
    color: var(--text-primary);
    box-shadow: 0 4px 20px rgba(33, 150, 243, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 25px rgba(33, 150, 243, 0.4);
    color: var(--text-primary);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--stroke-default);
}

.btn-secondary:hover {
    background: var(--bg-secondary);
    border-color: var(--stroke-light);
    color: var(--text-primary);
}

.btn-large {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.125rem;
}

.btn-icon {
    width: 20px;
    height: 20px;
}

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

.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xxxl) var(--spacing-xl);
    position: relative;
    background:
        linear-gradient(to bottom, rgba(13, 13, 13, 0.7) 0%, rgba(13, 13, 13, 0.85) 100%),
        url('hero-bg.png') center center / cover no-repeat,
        var(--bg-primary);
}

.hero-content {
    max-width: 800px;
    background: rgba(13, 13, 13, 0.5);
    padding: var(--spacing-xxl);
    border-radius: var(--radius-xl);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
}

.hero-icon {
    width: 120px;
    height: 120px;
    margin-bottom: var(--spacing-xl);
    border-radius: var(--radius-xl);
    box-shadow: 0 8px 40px rgba(33, 150, 243, 0.3);
    animation: float 3s ease-in-out infinite;
}

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-cyan) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-size: 1.25rem;
    color: var(--accent-cyan);
    margin-bottom: var(--spacing-lg);
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xxl);
    line-height: 1.8;
}

/* Hero Staggered Text Reveal Animation */
.hero-animate {
    opacity: 0;
    transform: translateY(20px);
    animation: heroReveal 0.8s ease forwards;
}

.hero-animate:nth-child(1) {
    animation-delay: 0.1s;
}

.hero-animate:nth-child(2) {
    animation-delay: 0.25s;
}

.hero-animate:nth-child(3) {
    animation-delay: 0.4s;
}

.hero-animate:nth-child(4) {
    animation-delay: 0.55s;
}

.hero-animate:nth-child(5) {
    animation-delay: 0.7s;
}

@keyframes heroReveal {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
    animation: fadeInUp 1s ease 0.5s both;
}

.scroll-text {
    font-size: 0.75rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 24px;
    height: 24px;
    color: var(--accent-cyan);
    animation: bounce 2s ease-in-out infinite;
}

.scroll-arrow svg {
    width: 100%;
    height: 100%;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(8px);
    }

    60% {
        transform: translateY(4px);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Section Dividers */
.section-divider {
    height: 1px;
    background: linear-gradient(90deg,
            transparent 0%,
            var(--accent-cyan) 20%,
            var(--accent-blue) 50%,
            var(--accent-cyan) 80%,
            transparent 100%);
    opacity: 0.3;
    margin: 0;
}

/* ============================================== */
/* WHY SECTION (FEATURES GRID)                    */
/* ============================================== */

.why-section {
    background: var(--bg-secondary);
}

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

.feature-card {
    background: var(--bg-primary);
    border: 1px solid var(--stroke-default);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    text-align: center;
    transition: all var(--transition-normal);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-blue);
    box-shadow: 0 8px 30px rgba(33, 150, 243, 0.15);
}

.feature-icon {
    width: 60px;
    height: 60px;
    margin: 0 auto var(--spacing-lg);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.feature-icon svg {
    width: 32px;
    height: 32px;
}

.feature-icon-blue {
    background: rgba(33, 150, 243, 0.15);
    color: var(--accent-blue);
}

.feature-icon-gold {
    background: rgba(255, 193, 7, 0.15);
    color: var(--accent-gold);
}

.feature-icon-cyan {
    background: rgba(79, 195, 247, 0.15);
    color: var(--accent-cyan);
}

.feature-icon-green {
    background: rgba(76, 175, 80, 0.15);
    color: var(--type-array);
}

.feature-card h3 {
    margin-bottom: var(--spacing-sm);
    font-size: 1.125rem;
}

.feature-card p {
    font-size: 0.9375rem;
    line-height: 1.6;
}

/* ============================================== */
/* VIEWING MODES SECTION                          */
/* ============================================== */

.modes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.mode-card {
    background: var(--bg-secondary);
    border: 1px solid var(--stroke-default);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

.mode-card:hover {
    border-color: var(--stroke-light);
}

.mode-card-featured {
    border-color: var(--accent-blue);
    box-shadow: 0 0 30px rgba(33, 150, 243, 0.1);
}

.mode-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.mode-badge {
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
}

.mode-badge-text {
    background: rgba(245, 158, 11, 0.2);
    color: var(--type-string);
}

.mode-badge-browser {
    background: rgba(33, 150, 243, 0.2);
    color: var(--accent-blue);
}

.mode-badge-structure {
    background: rgba(156, 39, 176, 0.2);
    color: var(--type-object);
}

.mode-subtitle {
    color: var(--text-tertiary);
    font-size: 0.875rem;
}

.mode-screenshot {
    margin: var(--spacing-lg) 0;
    text-align: center;
    perspective: 1000px;
}

.mode-screenshot img {
    max-width: 200px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    transform-style: preserve-3d;
}

.mode-screenshot img:hover {
    transform: rotateY(-5deg) rotateX(3deg) scale(1.03);
    box-shadow: 0 15px 40px rgba(79, 195, 247, 0.2);
}

.mode-description {
    margin-bottom: var(--spacing-lg);
    font-size: 0.9375rem;
}

.mode-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.mode-features li {
    font-size: 0.875rem;
    color: var(--text-secondary);
    padding-left: var(--spacing-lg);
    position: relative;
}

.mode-features li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 8px;
    width: 6px;
    height: 6px;
    background: var(--accent-cyan);
    border-radius: 50%;
}

.mode-features li strong {
    color: var(--text-primary);
}

/* ============================================== */
/* ANALYSIS SECTION                               */
/* ============================================== */

.analysis-section {
    background: var(--bg-secondary);
}

.analysis-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    gap: var(--spacing-xxl);
    align-items: center;
}

.analysis-screenshot {
    flex-shrink: 0;
}

.analysis-screenshot img {
    max-width: 220px;
    height: auto;
    border-radius: var(--radius-lg);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.4);
}

.analysis-main {
    flex: 1;
}

.analysis-main h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-cyan);
}

.analysis-main>p {
    margin-bottom: var(--spacing-xl);
}

.analysis-features {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.analysis-feature {
    display: flex;
    gap: var(--spacing-md);
    align-items: flex-start;
}

.analysis-feature-icon {
    color: var(--accent-gold);
    font-size: 0.75rem;
    margin-top: 6px;
}

.analysis-feature strong {
    display: block;
    margin-bottom: var(--spacing-xs);
}

.analysis-feature p {
    font-size: 0.9375rem;
}

/* ============================================== */
/* TOOLS SECTION                                  */
/* ============================================== */

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-lg);
}

.tool-card {
    background: var(--bg-secondary);
    border: 1px solid var(--stroke-default);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-normal);
}

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

.tool-card h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--accent-gold);
}

.tool-card p {
    font-size: 0.9375rem;
}

/* ============================================== */
/* EXPORT SECTION                                 */
/* ============================================== */

.export-section {
    background: var(--bg-secondary);
}

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

.export-feature {
    background: var(--bg-primary);
    border: 1px solid var(--stroke-default);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
}

.export-feature h4 {
    margin-bottom: var(--spacing-sm);
    color: var(--type-array);
}

.export-feature p {
    font-size: 0.9375rem;
}

/* ============================================== */
/* FORMATS SECTION                                */
/* ============================================== */

.formats-grid {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-lg);
}

.format-badge {
    padding: var(--spacing-md) var(--spacing-xxl);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1.125rem;
}

.format-json {
    background: linear-gradient(135deg, rgba(33, 150, 243, 0.2) 0%, rgba(79, 195, 247, 0.2) 100%);
    border: 1px solid var(--accent-blue);
    color: var(--accent-cyan);
}

.format-ndjson {
    background: rgba(76, 175, 80, 0.15);
    border: 1px solid var(--type-array);
    color: var(--type-array);
}

.format-text {
    background: rgba(158, 158, 158, 0.15);
    border: 1px solid var(--type-null);
    color: var(--type-null);
}

.formats-note {
    text-align: center;
    font-size: 0.9375rem;
}

/* ============================================== */
/* CTA SECTION                                    */
/* ============================================== */

.cta-section {
    background:
        radial-gradient(ellipse at center, rgba(33, 150, 243, 0.1) 0%, transparent 60%),
        var(--bg-primary);
}

.cta-content {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.cta-content h2 {
    margin-bottom: var(--spacing-lg);
    background: linear-gradient(135deg, var(--accent-gold) 0%, var(--type-string) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-content>p {
    margin-bottom: var(--spacing-lg);
    font-size: 1.0625rem;
    line-height: 1.8;
}

.cta-buttons {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
    margin-top: var(--spacing-xxl);
}

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

.footer {
    background: var(--bg-secondary);
    padding: var(--spacing-xl) 0;
    text-align: center;
    border-top: 1px solid var(--stroke-default);
}

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

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

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

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

/* ============================================== */
/* LIGHTBOX                                        */
/* ============================================== */

.lightbox {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.lightbox.active {
    opacity: 1;
    visibility: visible;
}

.lightbox-content {
    position: relative;
    max-width: 90vw;
    max-height: 90vh;
}

.lightbox-image {
    max-width: 90vw;
    max-height: 90vh;
    object-fit: contain;
    border-radius: var(--radius-lg);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.lightbox.active .lightbox-image {
    transform: scale(1);
}

.lightbox-close {
    position: absolute;
    top: -40px;
    right: 0;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 2rem;
    cursor: pointer;
    padding: var(--spacing-sm);
    opacity: 0.7;
    transition: opacity var(--transition-fast);
}

.lightbox-close:hover {
    opacity: 1;
}

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

@media (max-width: 768px) {
    h1 {
        font-size: 2rem;
    }

    h2 {
        font-size: 1.5rem;
    }

    h3 {
        font-size: 1.25rem;
    }

    .hero h1 {
        font-size: 2.25rem;
    }

    .hero-icon {
        width: 100px;
        height: 100px;
    }

    .hero-tagline {
        font-size: 1.125rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section {
        padding: var(--spacing-xxl) 0;
    }

    .container {
        padding: 0 var(--spacing-lg);
    }

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

    .analysis-content {
        flex-direction: column;
        text-align: center;
    }

    .analysis-screenshot img {
        max-width: 180px;
    }

    .scroll-indicator {
        display: none;
    }

    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }

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

@media (max-width: 480px) {
    .hero h1 {
        font-size: 1.75rem;
    }

    .formats-grid {
        flex-direction: column;
        align-items: center;
    }

    .format-badge {
        width: 100%;
        text-align: center;
    }
}