/* ============================================
   CSS VARIABLES & RESET
   ============================================ */
:root {
    --primary: #0f2847;
    --primary-light: #1a365d;
    --secondary: #0d9488;
    --secondary-glow: #14b8a6;
    --accent: #f97316;
    --accent-warm: #fb923c;
    --bg-deep: #060d1a;
    --bg-card: #0c1a2e;
    --bg-card-hover: #112240;
    --bg-elevated: #0f2035;
    --text-primary: #e2e8f0;
    --text-secondary: #a6b5c8;
    --text-muted: #7f91a8;
    --border: rgba(13, 148, 136, 0.15);
    --border-hover: rgba(13, 148, 136, 0.35);
    --glow-teal: rgba(13, 148, 136, 0.12);
    --glow-orange: rgba(249, 115, 22, 0.08);
    --font-display: 'Syne', sans-serif;
    --font-body: 'DM Sans', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
}

::selection {
    background: var(--secondary);
    color: var(--bg-deep);
}

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

/* ============================================
   UTILITIES
   ============================================ */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.container--narrow {
    max-width: 860px;
    margin: 0 auto;
    padding: 0 clamp(1.25rem, 4vw, 3rem);
}

.section {
    padding: clamp(4rem, 10vw, 8rem) 0;
    position: relative;
    content-visibility: auto;
    contain-intrinsic-size: 1px 900px;
}

.section--sm {
    padding: clamp(2rem, 5vw, 4rem) 0;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--secondary);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.section-label::before {
    content: '';
    width: 2rem;
    height: 1px;
    background: var(--secondary);
}

.section-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

.section-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 600px;
    margin-bottom: 3rem;
}

.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

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

.gradient-text {
    background: linear-gradient(135deg, var(--secondary-glow), var(--accent-warm));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: var(--secondary);
    color: var(--bg-deep);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border: none;
    border-radius: 8px;
    text-decoration: none;
    cursor: pointer;
    transition: background-color 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
}

.btn-primary:hover {
    background: var(--secondary-glow);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(13, 148, 136, 0.25);
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 2rem;
    background: transparent;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 0.95rem;
    border: 1px solid var(--border-hover);
    border-radius: 8px;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.3s ease, background-color 0.3s ease, border-color 0.3s ease, transform 0.3s ease;
}

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

.btn-sm {
    padding: 0.5rem 1.25rem;
    font-size: 0.85rem;
}

/* ============================================
   NAVIGATION
   ============================================ */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 1rem 0;
    transition: background 0.3s ease, backdrop-filter 0.3s ease, padding 0.3s ease;
}

.nav.scrolled {
    background: rgba(6, 13, 26, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0.6rem 0;
}

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

.nav-logo {
    font-family: var(--font-display);
    font-weight: 800;
    font-size: clamp(1.05rem, 1.6vw, 1.4rem);
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
    line-height: 1;
    display: inline-flex;
    align-items: center;
    gap: 0.2rem;
    white-space: nowrap;
}

.nav-logo span { color: var(--secondary); }

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

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--secondary);
    transition: width 0.3s ease;
}

.nav-links a:hover { color: var(--secondary-glow); }
.nav-links a:hover::after { width: 100%; }

.nav-cta {
    background: transparent;
    border: 1px solid var(--secondary);
    color: var(--secondary) !important;
    padding: 0.5rem 1.25rem;
    border-radius: 6px;
    transition: background-color 0.3s ease !important, color 0.3s ease !important, border-color 0.3s ease !important;
}

.nav-cta:hover {
    background: var(--secondary) !important;
    color: var(--bg-deep) !important;
}

.nav-cta::after { display: none !important; }

.nav-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    padding: 0.5rem;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    margin: 5px 0;
    transition: transform 0.3s ease, opacity 0.3s ease, background-color 0.3s ease;
    border-radius: 2px;
}

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

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

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

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    transition: color 0.3s ease;
}

.footer-links a:hover { color: var(--secondary-glow); }

/* ============================================
   RESPONSIVE — SHARED
   ============================================ */
@media (max-width: 768px) {
    .nav-logo { font-size: 1.02rem; }

    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(6, 13, 26, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 1.5rem;
        gap: 1rem;
        border-bottom: 1px solid var(--border);
    }

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

    .nav-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
    .nav-toggle.active span:nth-child(2) { opacity: 0; }
    .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }
}