/* ===========================
   CSS Variables & Reset
   =========================== */

:root {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --primary-light: #60a5fa;
    --secondary: #06b6d4;
    --dark: #0a0e17;
    --dark-secondary: #111827;
    --dark-tertiary: #1f2937;
    --dark-elevated: #374151;
    --text: #f9fafb;
    --text-secondary: #d1d5db;
    --text-tertiary: #9ca3af;
    --text-muted: #6b7280;
    --accent: #10b981;
    --border: #374151;
    --border-subtle: #1f2937;
    --gradient: linear-gradient(135deg, #2563eb 0%, #06b6d4 100%);
    --shadow: 0 20px 50px rgba(0, 0, 0, 0.6);
    --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.4);
    --border-radius: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    line-height: 1.6;
    color: var(--text);
    background: var(--dark);
    overflow-x: hidden;
}

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

/* ===========================
   Navigation
   =========================== */

.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(10, 14, 23, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(10, 14, 23, 0.9);
    border-bottom-color: var(--border);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    text-decoration: none;
    transition: var(--transition);
    letter-spacing: -0.02em;
}

.logo:hover {
    opacity: 0.8;
}

.logo-icon {
    width: 28px;
    height: 28px;
    color: var(--primary-light);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
}

.nav-link:hover {
    color: var(--text);
    background: rgba(255, 255, 255, 0.05);
}

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

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* ===========================
   Hero Section
   =========================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(14, 165, 233, 0.15) 0%, transparent 50%);
    z-index: -1;
}

.hero-content {
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    animation: fadeInUp 0.8s ease-out;
    letter-spacing: -0.03em;
}

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

.hero-subtitle {
    font-size: 1.125rem;
    color: var(--text-tertiary);
    margin-bottom: 2.5rem;
    line-height: 1.7;
    animation: fadeInUp 0.8s ease-out 0.2s both;
    font-weight: 400;
}

.hero-stats {
    margin-top: 4rem;
    display: flex;
    gap: 3rem;
    justify-content: center;
    animation: fadeInUp 0.8s ease-out 0.6s both;
}

.stat {
    text-align: center;
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--primary-light);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.9rem;
    color: var(--text-tertiary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===========================
   Sections
   =========================== */

section {
    padding: 6rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: 2.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

.section-subtitle {
    font-size: 1rem;
    color: var(--text-tertiary);
    max-width: 700px;
    margin: 0 auto;
    font-weight: 400;
    line-height: 1.7;
}

/* ===========================
   Capabilities Section
   =========================== */

.capabilities {
    background: var(--dark-secondary);
}

.capabilities-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.capability-card {
    background: var(--dark-tertiary);
    padding: 2rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
    border: 1px solid var(--border-subtle);
}

.capability-card:hover {
    transform: translateY(-2px);
    border-color: var(--border);
    background: rgba(31, 41, 55, 0.8);
}

.capability-icon {
    width: 40px;
    height: 40px;
    color: var(--primary-light);
    margin-bottom: 1.25rem;
    stroke-width: 1.5;
}

.capability-title {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 0.875rem;
    color: var(--text);
    letter-spacing: -0.01em;
}

.capability-description {
    color: var(--text-tertiary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

/* ===========================
   Technology Section
   =========================== */

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
}

.tech-card {
    background: var(--dark-secondary);
    padding: 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
}

.tech-card:hover {
    border-color: var(--border);
    background: rgba(17, 24, 39, 0.8);
}

.tech-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1.25rem;
}

.tech-icon {
    width: 32px;
    height: 32px;
    color: var(--primary-light);
    flex-shrink: 0;
    stroke-width: 1.5;
}

.tech-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.tech-description {
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
    line-height: 1.7;
    font-size: 0.9375rem;
}

.tech-specs {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

.spec-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.spec-label {
    color: var(--text-muted);
    font-size: 0.875rem;
    font-weight: 500;
}

.spec-value {
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* ===========================
   Architecture Section
   =========================== */

.architecture {
    background: var(--dark-secondary);
}

.architecture-content {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 4rem;
    align-items: start;
}

.architecture-description {
    color: var(--text-tertiary);
    margin-bottom: 1.5rem;
    line-height: 1.8;
    font-size: 1rem;
}

.architecture-highlights {
    display: flex;
    flex-direction: column;
    gap: 2rem;
    margin-top: 2.5rem;
}

.highlight {
    display: flex;
    gap: 1.25rem;
    align-items: start;
}

.highlight-icon {
    width: 24px;
    height: 24px;
    color: var(--primary-light);
    flex-shrink: 0;
    stroke-width: 1.5;
    margin-top: 0.25rem;
}

.highlight h4 {
    color: var(--text);
    font-size: 1rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
    letter-spacing: -0.01em;
}

.highlight p {
    color: var(--text-tertiary);
    line-height: 1.7;
    font-size: 0.9375rem;
}

.architecture-visual {
    display: grid;
    grid-template-columns: 1fr;
    gap: 1rem;
    position: relative;
}

.visual-card {
    background: var(--dark-tertiary);
    padding: 1.75rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.visual-card:hover {
    border-color: var(--border);
}

.card-icon {
    width: 32px;
    height: 32px;
}

.card-icon svg {
    width: 100%;
    height: 100%;
    color: var(--primary-light);
    stroke-width: 1.5;
}

.card-label {
    font-size: 0.8125rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 500;
}

.card-metric {
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text);
    font-family: 'SF Mono', 'Monaco', 'Inconsolata', 'Roboto Mono', monospace;
}

/* ===========================
   Contact Section
   =========================== */

.contact-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    max-width: 800px;
    margin: 0 auto;
}

.contact-card {
    background: var(--dark-secondary);
    padding: 2.5rem 2rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-subtle);
    transition: var(--transition);
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.contact-card:hover {
    transform: translateY(-2px);
    border-color: var(--border);
    background: rgba(17, 24, 39, 0.8);
}

.contact-icon {
    width: 48px;
    height: 48px;
    color: var(--primary-light);
    stroke-width: 1.5;
}

.contact-name {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: -0.01em;
}

.contact-email {
    color: var(--primary-light);
    text-decoration: none;
    font-size: 1rem;
    transition: var(--transition);
    font-weight: 500;
}

.contact-email:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--dark-secondary);
    padding: 3rem 0 1.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 2fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-brand {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-tagline {
    color: var(--text-tertiary);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.footer-column h4 {
    color: var(--text);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.footer-column ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-column a {
    color: var(--text-tertiary);
    text-decoration: none;
    transition: var(--transition);
}

.footer-column a:hover {
    color: var(--primary-light);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-bottom p {
    color: var(--text-tertiary);
    font-size: 0.9rem;
}

/* ===========================
   Animations
   =========================== */

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

.fade-in {
    opacity: 0;
    animation: fadeInUp 0.8s ease-out forwards;
}

/* ===========================
   Responsive Design
   =========================== */

@media (max-width: 968px) {
    .hero-title {
        font-size: 3rem;
    }

    .architecture-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .menu-toggle {
        display: flex;
    }

    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--dark-secondary);
        flex-direction: column;
        padding: 2rem;
        gap: 1rem;
        transform: translateY(-100%);
        opacity: 0;
        pointer-events: none;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        pointer-events: all;
    }

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

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .hero-stats {
        flex-direction: column;
        gap: 2rem;
    }

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

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

    .footer-links {
        grid-template-columns: 1fr;
    }

    .contact-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

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

    .stat-number {
        font-size: 2rem;
    }
}