:root {
    --primary: #6366f1;
    --primary-hover: #4f46e5;
    --primary-glow: rgba(99, 102, 241, 0.4);
    --bg-dark: #0a0e1a;
    --bg-card: #111827;
    --bg-section-alt: #0d1117;
    --text-main: #f1f5f9;
    --text-muted: #94a3b8;
    --text-dim: #64748b;
    --border-subtle: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);
    --accent-auth: #a78bfa;
    --accent-chat: #34d399;
    --accent-llm: #60a5fa;
    --accent-windmill: #fbbf24;
    --font-body: 'Outfit', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius: 16px;
    --radius-sm: 10px;
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

html,
body {
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

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

a:hover {
    color: var(--primary-hover);
}

/* ==================== NAVBAR ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: rgba(10, 14, 26, 0.6);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-subtle);
    padding: 0.85rem 0;
    transition: all var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.92);
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-main) !important;
    text-decoration: none;
    background: linear-gradient(135deg, #fff 0%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-links {
    display: flex;
    gap: 2rem;
}

.nav-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition);
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width var(--transition);
}

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

.nav-links a:hover::after {
    width: 100%;
}

/* Buttons */
.cta-button {
    display: inline-block;
    background: linear-gradient(135deg, var(--primary) 0%, #818cf8 100%);
    color: white !important;
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    transition: all var(--transition);
    box-shadow: 0 4px 20px var(--primary-glow);
    border: none;
    cursor: pointer;
}

.cta-button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--primary-glow);
    filter: brightness(1.1);
}

.cta-button.small {
    padding: 0.5rem 1.4rem;
    font-size: 0.85rem;
}

.secondary-button {
    display: inline-block;
    color: var(--text-main);
    padding: 0.75rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--border-hover);
    background: rgba(255, 255, 255, 0.03);
    transition: all var(--transition);
}

.secondary-button:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.08);
    color: var(--text-main);
    transform: translateY(-2px);
}

/* Mobile menu */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.mobile-menu-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-main);
    transition: all var(--transition);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translateY(7px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translateY(-7px);
}

/* ==================== HERO ==================== */
.hero {
    padding: 11rem 0 7rem;
    position: relative;
    text-align: center;
    overflow: hidden;
    min-height: 90vh;
    display: flex;
    align-items: center;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 820px;
    margin: 0 auto;
}

.hero-badge {
    display: inline-block;
    background: rgba(99, 102, 241, 0.12);
    color: var(--primary);
    padding: 0.4rem 1.2rem;
    border-radius: 50px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 2rem;
    border: 1px solid rgba(99, 102, 241, 0.2);
    letter-spacing: 0.02em;
}

.hero h1 {
    font-size: 4rem;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    font-weight: 700;
    background: linear-gradient(to bottom right, #fff 30%, #94a3b8 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtext {
    font-size: 1.2rem;
    color: var(--text-muted);
    margin-bottom: 2.5rem;
    line-height: 1.8;
    max-width: 650px;
    margin-left: auto;
    margin-right: auto;
}

.hero-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.hero-glow {
    position: absolute;
    top: 30%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 800px;
    height: 800px;
    background: radial-gradient(circle, rgba(99, 102, 241, 0.12) 0%, transparent 70%);
    z-index: 1;
    pointer-events: none;
    animation: pulse-glow 6s ease-in-out infinite;
    max-width: 100vw;
}

.hero-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    z-index: 0;
    mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

@keyframes pulse-glow {

    0%,
    100% {
        opacity: 0.6;
        transform: translate(-50%, -50%) scale(1);
    }

    50% {
        opacity: 1;
        transform: translate(-50%, -50%) scale(1.1);
    }
}

/* ==================== SECTIONS ==================== */
.section {
    padding: 7rem 0;
}

.section-title {
    font-size: 2.5rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 700;
}

.section-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 4rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

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

/* ==================== SERVICES GRID ==================== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.service-card {
    background: var(--bg-card);
    padding: 2.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition);
    position: relative;
    overflow: hidden;
}

.service-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    transition: height var(--transition);
}

.service-card[data-accent="auth"]::before {
    background: linear-gradient(90deg, var(--accent-auth), transparent);
}

.service-card[data-accent="chat"]::before {
    background: linear-gradient(90deg, var(--accent-chat), transparent);
}

.service-card[data-accent="llm"]::before {
    background: linear-gradient(90deg, var(--accent-llm), transparent);
}

.service-card[data-accent="windmill"]::before {
    background: linear-gradient(90deg, var(--accent-windmill), transparent);
}

.service-card:hover {
    transform: translateY(-4px);
    border-color: var(--border-hover);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.service-card:hover::before {
    height: 4px;
}

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

.service-badge {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.04);
    padding: 0.25rem 0.75rem;
    border-radius: 6px;
    margin-bottom: 1rem;
    border: 1px solid var(--border-subtle);
}

.service-card h3 {
    font-size: 1.4rem;
    margin-bottom: 0.3rem;
}

.service-tagline {
    color: var(--text-dim);
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 1rem !important;
}

.service-card p {
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-size: 0.95rem;
}

.service-features {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.service-features li {
    font-size: 0.8rem;
    color: var(--text-dim);
    background: rgba(255, 255, 255, 0.04);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    border: 1px solid var(--border-subtle);
}

/* ==================== ARCHITECTURE ==================== */
.architecture-diagram {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    padding: 3rem 0;
}

.arch-node {
    background: var(--bg-card);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 1.5rem 2.5rem;
    text-align: center;
    transition: all var(--transition);
}

.arch-center {
    background: linear-gradient(135deg, rgba(167, 139, 250, 0.15), var(--bg-card));
    border-color: rgba(167, 139, 250, 0.25);
    padding: 2rem 3rem;
    box-shadow: 0 0 40px rgba(167, 139, 250, 0.1);
}

.arch-icon {
    font-size: 2rem;
    display: block;
    margin-bottom: 0.5rem;
}

.arch-label {
    font-weight: 600;
    font-size: 1.1rem;
    display: block;
}

a.arch-label {
    color: var(--text-main);
    text-decoration: none;
}

a.arch-label:hover {
    color: var(--primary);
}

.service-card h3 a {
    color: var(--text-main);
    text-decoration: none;
}

.service-card h3 a:hover {
    color: var(--primary);
}

.arch-sublabel {
    font-size: 0.8rem;
    color: var(--text-dim);
    display: block;
    margin-top: 0.25rem;
}

.arch-satellites {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

.arch-satellite {
    padding: 1.2rem 2rem;
}

.arch-satellite[data-accent="chat"] {
    border-color: rgba(52, 211, 153, 0.25);
    box-shadow: 0 0 20px rgba(52, 211, 153, 0.05);
}

.arch-satellite[data-accent="llm"] {
    border-color: rgba(96, 165, 250, 0.25);
    box-shadow: 0 0 20px rgba(96, 165, 250, 0.05);
}

.arch-satellite[data-accent="windmill"] {
    border-color: rgba(251, 191, 36, 0.25);
    box-shadow: 0 0 20px rgba(251, 191, 36, 0.05);
}

.arch-connector-label {
    color: var(--text-dim);
    font-size: 0.85rem;
    font-weight: 500;
    background: rgba(255, 255, 255, 0.04);
    padding: 0.4rem 1.2rem;
    border-radius: 20px;
    border: 1px dashed var(--border-hover);
}

/* ==================== STEPS ==================== */
.steps-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.step-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
    position: relative;
    transition: all var(--transition);
    max-width: 100%;
}

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

.step-number {
    font-size: 5rem;
    font-weight: 800;
    color: rgba(99, 102, 241, 0.06);
    position: absolute;
    top: 0.5rem;
    right: 1.5rem;
    line-height: 1;
    pointer-events: none;
}

.step-card h3 {
    margin-bottom: 0.75rem;
    color: var(--primary);
    font-size: 1.15rem;
}

.step-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.code-block {
    background: rgba(0, 0, 0, 0.35);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-sm);
    padding: 0.7rem 1rem;
    margin-bottom: 1rem;
    overflow-x: auto;
}

.code-block code {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-chat);
    white-space: nowrap;
}

/* ==================== BENEFITS ==================== */
.benefits-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.benefit-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius);
    padding: 2rem;
    transition: all var(--transition);
}

.benefit-card:hover {
    border-color: var(--border-hover);
    background: rgba(255, 255, 255, 0.04);
    transform: translateY(-3px);
}

.benefit-icon {
    font-size: 2rem;
    margin-bottom: 1rem;
    display: block;
}

.benefit-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.75rem;
}

.benefit-card p {
    color: var(--text-muted);
    font-size: 0.9rem;
    line-height: 1.7;
}

/* ==================== PREREQUISITES ==================== */
.prereq-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    max-width: 900px;
    margin: 0 auto;
}

.prereq-item {
    display: flex;
    align-items: flex-start;
    gap: 1.2rem;
    background: var(--bg-card);
    padding: 1.5rem 2rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-subtle);
    transition: all var(--transition);
}

.prereq-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-2px);
}

.prereq-icon {
    font-size: 1.8rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.prereq-item h4 {
    font-size: 1rem;
    margin-bottom: 0.3rem;
}

.prereq-item p {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.prereq-item a {
    color: var(--primary);
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ==================== CTA SECTION ==================== */
.cta-section {
    text-align: center;
    padding: 8rem 0;
}

.cta-text {
    color: var(--text-muted);
    font-size: 1.15rem;
    max-width: 600px;
    margin: 0 auto 2.5rem;
    line-height: 1.8;
}

.cta-actions {
    margin-bottom: 2rem;
}

.cta-contact {
    color: var(--text-dim);
    font-size: 0.9rem;
}

.cta-contact strong {
    color: var(--text-muted);
}

/* ==================== FOOTER ==================== */
.footer {
    padding: 4rem 0 3rem;
    border-top: 1px solid var(--border-subtle);
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
}

.footer-brand {
    text-align: center;
}

.footer-brand p {
    color: var(--text-dim);
    font-size: 0.9rem;
    margin-top: 0.5rem;
}

.footer-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    justify-content: center;
}

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

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

.footer-bottom p {
    color: var(--text-dim);
    font-size: 0.85rem;
}

/* ==================== SCROLL REVEAL ==================== */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 1024px) {
    .services-grid {
        grid-template-columns: 1fr;
    }

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

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

@media (max-width: 768px) {
    .hero {
        padding: 8rem 0 5rem;
        min-height: auto;
    }

    .hero h1 {
        font-size: 2.5rem;
    }

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

    .section {
        padding: 4rem 0;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        flex-direction: column;
        background: rgba(10, 14, 26, 0.97);
        backdrop-filter: blur(20px);
        padding: 1.5rem 2rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border-subtle);
    }

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

    .mobile-menu-toggle {
        display: flex;
    }

    .cta-button.small {
        display: none;
    }

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

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

    .arch-satellites {
        flex-direction: column;
        align-items: center;
    }

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