/* 
  DATACORE SYSTEM v1.0
  Designed for ДатаВолт
  Theme: Deep Indigo / Cyber Security / Enterprise
*/

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
    /* Palette */
    --bg-core: #0B1120;
    --bg-surface: #151E32;
    --bg-elevated: #1E293B;
    
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --text-muted: #64748B;
    
    --accent-cyan: #06B6D4;
    --accent-cyan-glow: rgba(6, 182, 212, 0.4);
    --accent-cyan-dim: rgba(6, 182, 212, 0.1);
    
    --border-light: rgba(255, 255, 255, 0.08);
    --border-hover: rgba(255, 255, 255, 0.15);

    /* Spacing & Layout */
    --container-max: 1240px;
    --container-pad: clamp(1.5rem, 4vw, 3rem);
    
    /* Typography */
    --font-sans: 'Inter', sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    
    --h1-size: clamp(2.5rem, 5vw + 1rem, 4.5rem);
    --h2-size: clamp(2rem, 3vw + 1rem, 3rem);
    --h3-size: clamp(1.25rem, 2vw + 0.5rem, 1.5rem);
    --body-size: clamp(1rem, 1vw + 0.25rem, 1.125rem);
    
    /* Radius & Shadows */
    --radius-sm: 4px;
    --radius-md: 12px;
    --radius-lg: 24px;
    --shadow-card: 0 10px 40px -10px rgba(0,0,0,0.5);
}

/* RESET & BASE */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
    background-color: var(--bg-core);
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: var(--body-size);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

img, svg { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; transition: 0.3s ease; }
ul { list-style: none; }

/* UTILITIES */
.container {
    width: 100%;
    max-width: var(--container-max);
    margin: 0 auto;
    padding-left: var(--container-pad);
    padding-right: var(--container-pad);
}

.text-accent { color: var(--accent-cyan); }
.text-mono { font-family: var(--font-mono); font-size: 0.9em; letter-spacing: 0.05em; }
.bg-surface { background-color: var(--bg-surface); }

/* BUTTONS */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.85em 1.8em;
    font-weight: 600;
    border-radius: var(--radius-sm);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    cursor: pointer;
    font-size: 0.95rem;
}

.btn-primary {
    background: var(--accent-cyan);
    color: #000;
    border: 1px solid var(--accent-cyan);
}
.btn-primary:hover {
    background: transparent;
    color: var(--accent-cyan);
    box-shadow: 0 0 15px var(--accent-cyan-glow);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-light);
}
.btn-outline:hover {
    border-color: var(--text-primary);
    background: rgba(255,255,255,0.05);
}

/* HEADER & NAV */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 17, 32, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 0;
}

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

.logo {
    font-weight: 700;
    font-size: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: var(--text-primary);
}
.logo__icon {
    width: 32px;
    height: 32px;
    fill: var(--accent-cyan);
}

.nav { display: flex; align-items: center; gap: 2rem; }
.nav__list { display: flex; gap: 1.5rem; }
.nav__link {
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}
.nav__link:hover, .nav__link.active { color: var(--text-primary); }
.nav__link.active { color: var(--accent-cyan); }

.nav__cta { margin-left: 1rem; }

/* Mobile Nav Toggle (Simplified for CSS-only demo) */
@media (max-width: 900px) {
    .nav__list { display: none; } /* Hide for simplicity in this CSS-only snippet */
    .nav__cta { display: none; }
}

/* SECTIONS */
.section {
    padding: clamp(4rem, 10vh, 8rem) 0;
    position: relative;
    overflow: hidden;
}
.section--dark { background-color: var(--bg-core); }
.section--elevated { background-color: var(--bg-surface); }

.heading-xl {
    font-size: var(--h1-size);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    letter-spacing: -0.02em;
}
.heading-lg {
    font-size: var(--h2-size);
    font-weight: 600;
    margin-bottom: 1rem;
    letter-spacing: -0.01em;
}
.heading-md {
    font-size: var(--h3-size);
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.lead {
    font-size: clamp(1.125rem, 2vw, 1.35rem);
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 2.5rem;
    line-height: 1.5;
}
.body-text { color: var(--text-secondary); margin-bottom: 1.5rem; }
.body-text:last-child { margin-bottom: 0; }

/* HERO SPECIFIC */
.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    min-height: 80vh;
}
.hero-badge {
    display: inline-block;
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
    padding: 0.4rem 1rem;
    border-radius: 100px;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    border: 1px solid rgba(6, 182, 212, 0.2);
}
.hero-img-wrap {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    border: 1px solid var(--border-light);
    background: radial-gradient(circle at center, #1e293b 0%, #0f172a 100%);
    aspect-ratio: 4/3;
}
.hero-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.9;
}

/* CARDS */
.card-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}
.card {
    background: var(--bg-elevated);
    padding: 2.5rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-light);
    transition: transform 0.3s ease, border-color 0.3s ease;
}
.card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-cyan);
}
.card__icon {
    width: 48px;
    height: 48px;
    background: var(--accent-cyan-dim);
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    margin-bottom: 1.5rem;
}
.card__icon svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 2; }

/* STATS */
.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 3rem;
    text-align: center;
    padding: 3rem 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}
.stat-number {
    display: block;
    font-size: clamp(2.5rem, 4vw, 3.5rem);
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-bottom: 0.5rem;
    font-family: var(--font-mono);
}
.stat-label {
    color: var(--text-muted);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* CTA BAND */
.cta-band {
    background: linear-gradient(135deg, var(--bg-surface) 0%, #0f2335 100%);
    border-radius: var(--radius-lg);
    padding: 4rem 2rem;
    text-align: center;
    border: 1px solid var(--border-light);
}
.cta-actions {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 2rem;
}

/* FAQ */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
}
.faq-item {
    border-bottom: 1px solid var(--border-light);
    padding: 1.5rem 0;
}
.faq-question {
    font-weight: 600;
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}
.faq-answer {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* FOOTER */
.footer {
    background-color: #05080f;
    padding: 5rem 0 2rem;
    border-top: 1px solid var(--border-light);
    font-size: 0.9rem;
}
.footer__grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1fr;
    gap: 4rem;
    margin-bottom: 4rem;
}
.footer__brand-desc {
    color: var(--text-muted);
    margin-top: 1rem;
    max-width: 300px;
}
.footer__col-title {
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: block;
}
.footer__link {
    display: block;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}
.footer__link:hover { color: var(--accent-cyan); }
.footer__bottom {
    border-top: 1px solid var(--border-light);
    padding-top: 2rem;
    display: flex;
    justify-content: space-between;
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* Responsive Overrides */
@media (max-width: 992px) {
    .hero-grid { grid-template-columns: 1fr; text-align: center; }
    .lead { margin-left: auto; margin-right: auto; }
    .hero-actions { justify-content: center; }
    .hero-img-wrap { margin-top: 2rem; }
    .footer__grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}
@media (max-width: 600px) {
    .footer__grid { grid-template-columns: 1fr; }
    .footer__bottom { flex-direction: column; gap: 1rem; }
    .cta-actions { flex-direction: column; }
}body{margin:0}img,svg,video{max-width:100%;height:auto}*{box-sizing:border-box}