/* ================================================================
   НЕЙРОМЕДИА — Общий CSS
   Подключать: <link rel="stylesheet" href="css/main.css">
   ================================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;800;900&display=swap');

/* ==================== DESIGN TOKENS ==================== */
:root {
    --primary:    #00D9FF;
    --secondary:  #6B3FD6;
    --accent:     #00D97F;
    --dark:       #0F1117;
    --dark2:      #1a1a2e;
    --text:       #E8E8F0;
    --text-muted: #888;
    --border:     rgba(255,255,255,0.08);
    --glass-bg:   rgba(255,255,255,0.05);
    --nav-height: 64px;
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--dark);
    color: var(--text);
    overflow-x: hidden;
    width: 100%;
    min-height: 100vh;
}

/* ==================== UTILITIES ==================== */
.glass {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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

/* ==================== SITE NAVIGATION ==================== */
.site-nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(15, 17, 23, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 0 24px;
}

.site-nav .nav-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: var(--nav-height);
}

/* Logo */
.site-nav .logo {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    flex-shrink: 0;
    transition: transform 0.2s;
}
.site-nav .logo:hover { transform: scale(1.03); }

.site-nav .logo-icon {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.site-nav .logo-text {
    font-size: 18px;
    font-weight: 900;
    letter-spacing: -0.5px;
    color: var(--text);
    white-space: nowrap;
}

/* Desktop links */
.site-nav .nav-links {
    display: flex;
    align-items: center;
    gap: 28px;
}

.site-nav .nav-links a {
    color: rgba(232, 232, 240, 0.65);
    text-decoration: none;
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
}

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

/* Action buttons */
.site-nav .nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.btn-audit {
    background: rgba(255,255,255,0.08);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--text);
    padding: 8px 18px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-audit:hover {
    background: white;
    color: black;
    border-color: white;
}

.btn-vk {
    background: var(--primary);
    color: black;
    padding: 8px 20px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 800;
    text-transform: uppercase;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}
.btn-vk:hover {
    transform: scale(1.05);
    background: #00c4e8;
}

/* Burger */
.nav-burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
    flex-shrink: 0;
    background: none;
    border: none;
}
.nav-burger span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: all 0.3s;
}
.nav-burger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.nav-burger.open span:nth-child(2) { opacity: 0; }
.nav-burger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* Mobile menu */
.nav-mobile {
    display: none;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 20px 0 18px;
    border-top: 1px solid var(--border);
}
.nav-mobile.open { display: flex; }

.nav-mobile a {
    color: rgba(232, 232, 240, 0.7);
    text-decoration: none;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: color 0.2s;
}
.nav-mobile a:hover,
.nav-mobile a.active { color: var(--primary); }

.nav-mobile .btn-audit,
.nav-mobile .btn-vk {
    width: 80%;
    text-align: center;
    display: block;
}

@media (max-width: 1024px) {
    .site-nav .nav-links { display: none; }
    .site-nav .nav-actions .btn-vk { display: none; }
    .nav-burger { display: flex; }
}

/* Offset for fixed nav */
body { padding-top: var(--nav-height); }

/* ==================== SITE FOOTER ==================== */
.site-footer {
    padding: 60px 24px 30px;
    border-top: 1px solid var(--border);
    margin-top: 60px;
}

.site-footer .footer-inner {
    max-width: 1200px;
    margin: 0 auto;
}

.site-footer .footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 48px;
    margin-bottom: 40px;
}

.site-footer .footer-col h4 {
    font-size: 11px;
    font-weight: 900;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: rgba(232, 232, 240, 0.4);
    margin-bottom: 16px;
}

.site-footer .footer-brand {
    font-size: 22px;
    font-weight: 900;
    letter-spacing: -0.5px;
    color: var(--text);
    margin-bottom: 10px;
    display: block;
}

.site-footer .footer-col p,
.site-footer .footer-col a {
    font-size: 13px;
    color: rgba(232, 232, 240, 0.55);
    margin-bottom: 6px;
    text-decoration: none;
    display: block;
    line-height: 1.6;
}
.site-footer .footer-col a:hover { color: var(--primary); }

.site-footer .footer-phone {
    color: var(--primary) !important;
    font-weight: 700;
    font-size: 16px !important;
}

.site-footer .footer-bottom {
    border-top: 1px solid var(--border);
    padding-top: 24px;
    text-align: center;
    font-size: 12px;
    color: rgba(232, 232, 240, 0.25);
}

@media (max-width: 768px) {
    .site-footer .footer-grid {
        grid-template-columns: 1fr;
        gap: 28px;
        text-align: center;
    }
}

/* ==================== BRIEF MODAL ==================== */
#briefModal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: rgba(0,0,0,0.8);
    backdrop-filter: blur(8px);
    align-items: center;
    justify-content: center;
    padding: 16px;
}
#briefModal.open { display: flex; }

#briefModal .modal-content {
    background: #111;
    border: 1px solid #222;
    border-radius: 16px;
    width: 100%;
    max-width: 540px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
}

.step-indicator {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 16px 20px 0;
}

.step-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #333;
    transition: all 0.3s;
}
.step-dot.active    { background: var(--primary); transform: scale(1.3); }
.step-dot.completed { background: var(--accent); }

.brief-footer {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-top: 1px solid #222;
    gap: 12px;
}

.brief-btn {
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 13px;
    font-weight: 700;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
}
.brief-btn.primary { background: var(--primary); color: black; }
.brief-btn.primary:hover { background: #00c4e8; }
.brief-btn.secondary { background: #222; color: var(--text); border: 1px solid #333; }
.brief-btn.secondary:hover { background: #333; }

/* ==================== SCROLL ANIMATIONS ==================== */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-on-scroll.visible {
    opacity: 1;
    transform: none;
}

/* ==================== ANIMATED BACKGROUNDS ==================== */
.animated-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    z-index: -1;
    background: radial-gradient(circle at 50% 50%, #1a1a2e 0%, var(--dark) 100%);
    overflow: hidden;
}

.glow-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    animation: orbFloat 20s infinite alternate;
}
.orb-1 { width: 400px; height: 400px; background: var(--secondary); top: -10%; left: -10%; }
.orb-2 { width: 500px; height: 500px; background: var(--primary); bottom: -10%; right: -10%; animation-delay: -5s; }

.ai-network-bg {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background:
        radial-gradient(circle at 20% 20%, rgba(0,217,255,0.12), transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(107,63,214,0.12), transparent 40%),
        var(--dark);
    z-index: -2;
}
.ai-network-bg::before {
    content: "";
    position: absolute;
    width: 200%; height: 200%;
    background-image:
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 60px 60px;
    animation: networkMove 40s linear infinite;
}

/* ==================== KEYFRAMES ==================== */
@keyframes orbFloat {
    0%   { transform: translate(0, 0) scale(1); }
    100% { transform: translate(50px, 100px) scale(1.1); }
}

@keyframes networkMove {
    0%   { transform: translate(0, 0); }
    100% { transform: translate(-60px, -60px); }
}

@keyframes particleRise {
    0%   { transform: translateY(100vh) scale(0); opacity: 0; }
    50%  { opacity: 0.5; }
    100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

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

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 217, 255, 0.4); }
    50%       { box-shadow: 0 0 0 12px rgba(0, 217, 255, 0); }
}