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

:root {
    /* Colors */
    --color-primary: #00f0ff;
    --color-secondary: #7000ff;
    --color-accent: #ff006e;

    --color-bg: #0a0a0a;
    --color-bg-alt: #111111;
    --color-bg-card: #161616;
    --color-bg-card-hover: #1a1a1a;

    --color-text: #ffffff;
    --color-text-muted: #8a8a8a;
    --color-text-dim: #4a4a4a;

    --color-border: #2a2a2a;
    --color-border-hover: #3a3a3a;

    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'Space Grotesk', sans-serif;

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

    /* Layout */
    --container-max-width: 1200px;
    --nav-height: 70px;

    /* Effects */
    --transition-fast: 150ms ease;
    --transition-base: 300ms ease;
    --transition-slow: 500ms ease;

    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 20px rgba(0, 240, 255, 0.3);

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

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

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.2;
    color: var(--color-text);
}

h1 { font-size: clamp(2.5rem, 5vw, 4rem); }
h2 { font-size: clamp(2rem, 4vw, 3rem); }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }

p {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

a {
    color: inherit;
    text-decoration: none;
    transition: var(--transition-base);
}

ul {
    list-style: none;
}

/* ===== Container ===== */
.container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: rgba(10, 10, 10, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 var(--space-lg);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.5rem;
    color: var(--color-text);
}

.logo-icon {
    color: var(--color-primary);
    font-size: 1.25rem;
}

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

.nav-links li a {
    font-size: 0.9375rem;
    font-weight: 500;
    color: var(--color-text-muted);
    transition: var(--transition-base);
}

.nav-links li a:hover,
.nav-links li a.active {
    color: var(--color-primary);
}

.cta-button {
    padding: 0.625rem 1.25rem;
    background: var(--color-primary);
    color: var(--color-bg);
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.9375rem;
    transition: var(--transition-base);
}

.cta-button:hover {
    background: #00c4d1;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ===== Hero Section ===== */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding-top: var(--nav-height);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.grid-overlay {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(0, 240, 255, 0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 240, 255, 0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse at center, black 20%, transparent 70%);
}

.glow-orb {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(100px);
    opacity: 0.3;
    animation: float 20s ease-in-out infinite;
}

.orb-1 {
    background: var(--color-primary);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.orb-2 {
    background: var(--color-secondary);
    bottom: -200px;
    left: -200px;
    animation-delay: 10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(-30px, 30px) scale(1.1); }
}

.hero-content {
    position: relative;
    z-index: 1;
    text-align: center;
    max-width: 800px;
    padding: var(--space-lg);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-xs) var(--space-md);
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 100px;
    margin-bottom: var(--space-lg);
    animation: fadeInUp 600ms ease-out;
}

.badge-text {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--color-primary);
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.hero-title {
    margin-bottom: var(--space-lg);
    font-weight: 800;
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
    animation: fadeInUp 600ms ease-out backwards;
}

.title-line:nth-child(2) {
    animation-delay: 150ms;
}

.title-accent {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    margin-bottom: var(--space-xl);
    font-size: 1.25rem;
    line-height: 1.8;
    animation: fadeInUp 600ms ease-out 300ms backwards;
}

.hero-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 600ms ease-out 450ms backwards;
}

/* ===== Buttons ===== */
.button {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: 0.875rem 1.75rem;
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    transition: var(--transition-base);
    cursor: pointer;
    border: none;
}

.button-primary {
    background: var(--color-primary);
    color: var(--color-bg);
}

.button-primary:hover {
    background: #00c4d1;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.button-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.button-secondary:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
}

.button svg {
    transition: var(--transition-base);
}

.button:hover svg {
    transform: translateX(4px);
}

/* ===== Features Section ===== */
.features {
    padding: var(--space-3xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.section-title {
    margin-bottom: var(--space-sm);
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-muted);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--space-lg);
}

.feature-card {
    padding: var(--space-xl);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition-base);
    animation: fadeIn 600ms ease-out backwards;
}

.feature-card:nth-child(1) { animation-delay: 150ms; }
.feature-card:nth-child(2) { animation-delay: 300ms; }
.feature-card:nth-child(3) { animation-delay: 450ms; }

.feature-card:hover {
    border-color: var(--color-primary);
    background: var(--color-bg-card-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-md);
    color: var(--color-primary);
    background: rgba(0, 240, 255, 0.1);
    border-radius: var(--radius-md);
}

.feature-title {
    margin-bottom: var(--space-sm);
    font-size: 1.5rem;
}

.feature-description {
    margin-bottom: var(--space-md);
    color: var(--color-text-muted);
}

.feature-tags {
    display: flex;
    gap: var(--space-xs);
    flex-wrap: wrap;
}

.tag {
    padding: 0.25rem 0.75rem;
    background: rgba(0, 240, 255, 0.1);
    border: 1px solid rgba(0, 240, 255, 0.2);
    border-radius: 100px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Quick Start Section ===== */
.quick-start {
    padding: var(--space-3xl) 0;
    background: var(--color-bg-alt);
}

.quick-start-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-3xl);
    align-items: center;
}

@media (max-width: 768px) {
    .quick-start-grid {
        grid-template-columns: 1fr;
    }
}

.steps {
    display: flex;
    flex-direction: column;
    gap: var(--space-xl);
    margin-bottom: var(--space-xl);
}

.step {
    display: flex;
    gap: var(--space-md);
    align-items: flex-start;
}

.step-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    flex-shrink: 0;
    opacity: 0.5;
}

.step-content h3 {
    margin-bottom: var(--space-xs);
    font-size: 1.25rem;
}

.step-content p {
    color: var(--color-text-muted);
}

.quick-start-visual {
    display: flex;
    justify-content: center;
}

.visual-card {
    width: 100%;
    max-width: 400px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.visual-header {
    padding: var(--space-md);
    background: var(--color-bg-alt);
    border-bottom: 1px solid var(--color-border);
}

.visual-dots {
    display: flex;
    gap: var(--space-xs);
}

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

.visual-dots span:first-child {
    background: var(--color-accent);
}

.visual-content {
    padding: var(--space-lg);
}

.annotation-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) 0;
    border-bottom: 1px solid var(--color-border);
}

.annotation-item:last-child {
    border-bottom: none;
}

.annotation-time {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 700;
    color: var(--color-primary);
    font-variant-numeric: tabular-nums;
}

.annotation-text {
    color: var(--color-text);
}

/* ===== Support CTA ===== */
.support-cta {
    padding: var(--space-3xl) 0;
}

.cta-card {
    background: linear-gradient(135deg, var(--color-bg-card) 0%, var(--color-bg-alt) 100%);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-2xl);
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--space-2xl);
    align-items: center;
}

@media (max-width: 768px) {
    .cta-card {
        grid-template-columns: 1fr;
    }
}

.cta-title {
    margin-bottom: var(--space-md);
    font-size: 2rem;
}

.cta-description {
    margin-bottom: var(--space-lg);
    color: var(--color-text-muted);
}

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

.cta-stats {
    display: flex;
    gap: var(--space-xl);
    padding-left: var(--space-xl);
    border-left: 1px solid var(--color-border);
}

@media (max-width: 768px) {
    .cta-stats {
        padding-left: 0;
        border-left: none;
        border-top: 1px solid var(--color-border);
        padding-top: var(--space-lg);
        justify-content: center;
    }
}

.stat {
    text-align: center;
}

.stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: var(--space-xs);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Footer ===== */
.footer {
    padding: var(--space-2xl) 0 var(--space-lg);
    background: var(--color-bg-alt);
    border-top: 1px solid var(--color-border);
}

.footer-content {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: var(--space-2xl);
    margin-bottom: var(--space-xl);
}

@media (max-width: 768px) {
    .footer-content {
        grid-template-columns: 1fr;
    }
}

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

.footer-tagline {
    color: var(--color-text-muted);
    font-size: 0.9375rem;
}

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

.footer-section h4 {
    margin-bottom: var(--space-md);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
}

.footer-section ul {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
}

.footer-section ul li a {
    color: var(--color-text);
    font-size: 0.9375rem;
}

.footer-section ul li a:hover {
    color: var(--color-primary);
}

.footer-bottom {
    padding-top: var(--space-lg);
    border-top: 1px solid var(--color-border);
    text-align: center;
    color: var(--color-text-dim);
    font-size: 0.875rem;
}

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

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

/* ===== Responsive ===== */
@media (max-width: 768px) {
    .nav-links {
        gap: var(--space-md);
    }

    .nav-links li:not(:last-child) {
        display: none;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .button {
        justify-content: center;
    }

    .cta-actions {
        flex-direction: column;
    }

    .cta-actions .button {
        width: 100%;
    }
}