/* ===== CSS Variables & Reset ===== */
:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #0f1117;
    --bg-card: #141620;
    --bg-card-hover: #1a1d2e;
    --border: #1e2235;
    --border-hover: #2a2f4a;
    --text-primary: #e8eaed;
    --text-secondary: #8b8fa3;
    --text-muted: #5a5f73;
    --accent: #00e5a0;
    --accent-dim: #00c78a;
    --accent-glow: rgba(0, 229, 160, 0.15);
    --accent-glow-strong: rgba(0, 229, 160, 0.3);
    --accent-secondary: #00b8d4;
    --gradient: linear-gradient(135deg, #00e5a0, #00b8d4);
    --gradient-text: linear-gradient(135deg, #00e5a0, #00d4aa, #00b8d4);
    --radius: 12px;
    --radius-lg: 20px;
    --radius-sm: 8px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'SF Mono', monospace;
    --max-width: 1200px;
}

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

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

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

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

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

/* ===== Typography ===== */
h1, h2, h3, h4 {
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.5rem, 6vw, 4rem); }
h2 { font-size: clamp(1.8rem, 4vw, 2.8rem); }
h3 { font-size: 1.25rem; }

code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    background: rgba(0, 229, 160, 0.08);
    color: var(--accent);
    padding: 0.2em 0.5em;
    border-radius: 4px;
    border: 1px solid rgba(0, 229, 160, 0.15);
}

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

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
}

/* ===== Navigation ===== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), background var(--transition);
}

.nav.scrolled {
    border-bottom-color: var(--border);
    background: rgba(10, 10, 15, 0.95);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 24px;
    height: 72px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--text-primary);
}

.nav-logo:hover {
    color: var(--text-primary);
}

.nav-logo-img {
    width: 36px;
    height: 36px;
    border-radius: 8px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

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

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

.nav-github {
    display: flex;
    align-items: center;
    gap: 6px;
    background: var(--bg-card);
    padding: 8px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    transition: all var(--transition);
}

.nav-github:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    color: var(--text-primary) !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all var(--transition);
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 120px 24px 60px;
    position: relative;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: -200px;
    left: 50%;
    transform: translateX(-50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.hero-content {
    max-width: var(--max-width);
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent);
    background: var(--accent-glow);
    border: 1px solid rgba(0, 229, 160, 0.2);
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-top: 20px;
    max-width: 540px;
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 36px;
}

.hero-stats {
    display: flex;
    gap: 40px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid var(--border);
}

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

.stat-number {
    font-size: 2rem;
    font-weight: 800;
    background: var(--gradient-text);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.hero-image {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.hero-image-glow {
    position: absolute;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-glow-strong) 0%, transparent 70%);
    border-radius: 50%;
    pointer-events: none;
}

.hero-img {
    width: 100%;
    max-width: 460px;
    border-radius: var(--radius-lg);
    position: relative;
    z-index: 1;
    animation: float 6s ease-in-out infinite;
    filter: drop-shadow(0 20px 60px rgba(0, 229, 160, 0.15));
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

.hero-scroll {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.scroll-indicator {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
    0%, 100% { opacity: 0.3; transform: scaleY(0.5); }
    50% { opacity: 1; transform: scaleY(1); }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    font-size: 0.95rem;
    padding: 12px 28px;
    border-radius: var(--radius);
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    text-decoration: none;
}

.btn-primary {
    background: var(--gradient);
    color: #0a0a0f;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--accent-glow-strong);
    color: #0a0a0f;
}

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

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

.btn-lg {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* ===== Sections ===== */
.section {
    padding: 120px 0;
}

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

.section-header {
    text-align: center;
    max-width: 640px;
    margin: 0 auto 64px;
}

.section-tag {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 16px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 16px;
}

/* ===== Features Grid ===== */
.features-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    transition: all var(--transition);
}

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

.feature-icon {
    width: 56px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border: 1px solid rgba(0, 229, 160, 0.15);
    border-radius: var(--radius);
    color: var(--accent);
    margin-bottom: 20px;
}

.feature-card h3 {
    margin-bottom: 8px;
}

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

/* ===== Tools Grid ===== */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.tool-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    transition: all var(--transition);
}

.tool-category:hover {
    border-color: var(--border-hover);
}

.tool-category-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.tool-category-icon {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--accent-glow);
    border-radius: var(--radius-sm);
    color: var(--accent);
    flex-shrink: 0;
}

.tool-category h3 {
    font-size: 1rem;
}

.tool-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.tool-list li {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

/* ===== Interactions Grid ===== */
.interactions-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.interaction-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px;
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.interaction-card:hover {
    border-color: var(--accent);
    transform: translateY(-4px);
}

.interaction-card:hover .interaction-number {
    color: var(--accent);
}

.interaction-number {
    font-size: 3rem;
    font-weight: 900;
    color: var(--border);
    line-height: 1;
    margin-bottom: 16px;
    transition: color var(--transition);
}

.interaction-card h3 {
    margin-bottom: 8px;
}

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

/* ===== Providers Grid ===== */
.providers-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.provider-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 32px 24px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
}

.provider-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.provider-name {
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.provider-models {
    font-size: 0.85rem;
    color: var(--text-secondary);
    line-height: 1.6;
}

.provider-badge {
    display: inline-block;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--accent);
    background: var(--accent-glow);
    border: 1px solid rgba(0, 229, 160, 0.2);
    padding: 4px 12px;
    border-radius: 100px;
    margin-top: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== Security Grid ===== */
.security-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.security-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 40px 32px;
    text-align: center;
    transition: all var(--transition);
    position: relative;
}

.security-card.featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(0, 229, 160, 0.05), var(--bg-card));
}

.security-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.7rem;
    font-weight: 700;
    color: #0a0a0f;
    background: var(--gradient);
    padding: 4px 16px;
    border-radius: 100px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.security-card:hover {
    transform: translateY(-4px);
}

.security-icon {
    color: var(--accent);
    margin-bottom: 20px;
}

.security-card h3 {
    font-size: 1.3rem;
    margin-bottom: 12px;
}

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

.security-extras {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.security-extra {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 16px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.security-extra svg {
    color: var(--accent);
    flex-shrink: 0;
}

/* ===== Architecture Flow ===== */
.architecture-flow {
    max-width: 600px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.flow-step {
    display: flex;
    align-items: center;
    gap: 24px;
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px 32px;
    transition: all var(--transition);
}

.flow-step:hover {
    border-color: var(--accent);
}

.flow-number {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient);
    color: #0a0a0f;
    font-weight: 800;
    font-size: 1.2rem;
    border-radius: 50%;
    flex-shrink: 0;
}

.flow-content h3 {
    font-size: 1.1rem;
    margin-bottom: 4px;
}

.flow-content p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.flow-arrow {
    color: var(--accent);
    padding: 8px 0;
    opacity: 0.5;
}

/* ===== CTA Section ===== */
.cta-section {
    text-align: center;
}

.cta-content {
    position: relative;
    padding: 80px 40px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

.cta-glow {
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    pointer-events: none;
}

.cta-content h2 {
    position: relative;
    z-index: 1;
}

.cta-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: 16px;
    position: relative;
    z-index: 1;
}

.cta-actions {
    display: flex;
    gap: 16px;
    justify-content: center;
    margin-top: 36px;
    position: relative;
    z-index: 1;
}

.cta-cellbreak {
    margin-top: 28px;
    position: relative;
    z-index: 1;
    padding: 16px 24px;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    display: inline-block;
}

.cta-cellbreak p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 0;
}

.cellbreak-link {
    color: var(--accent);
    font-weight: 600;
}

.cellbreak-link:hover {
    color: var(--accent-secondary);
}

.cta-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    justify-content: center;
    margin-top: 40px;
    position: relative;
    z-index: 1;
}

.cta-tech span {
    font-size: 0.8rem;
    color: var(--text-muted);
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border);
    padding: 6px 14px;
    border-radius: 100px;
}

/* ===== Footer ===== */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

.footer-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
}

.footer-logo {
    width: 28px;
    height: 28px;
    border-radius: 6px;
}

.footer-links {
    display: flex;
    gap: 24px;
}

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

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

.footer-copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* ===== Animations ===== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .features-grid,
    .tools-grid,
    .providers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 72px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: rgba(10, 10, 15, 0.98);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--border);
    }

    .nav-links.open {
        display: flex;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

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

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

    .hero-stats {
        justify-content: center;
        flex-wrap: wrap;
        gap: 24px;
    }

    .hero-image {
        order: -1;
    }

    .hero-img {
        max-width: 320px;
    }

    .features-grid,
    .tools-grid,
    .interactions-grid,
    .security-grid,
    .providers-grid {
        grid-template-columns: 1fr;
    }

    .security-extras {
        grid-template-columns: 1fr;
    }

    .footer-inner {
        flex-direction: column;
        gap: 16px;
        text-align: center;
    }

    .cta-content {
        padding: 48px 24px;
    }

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

    .hero-scroll {
        display: none;
    }
}

@media (max-width: 480px) {
    .section {
        padding: 80px 0;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.6rem; }
}