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

:root {
    --bg:       #030810;
    --bg2:      #07111f;
    --surface:  #0b1829;
    --card:     #0f1f35;
    --border:   rgba(0, 212, 255, 0.12);
    --accent:   #00d4ff;
    --accent2:  #7c3aed;
    --text:     #dce8f5;
    --muted:    #6a8aaa;
    --white:    #ffffff;
}

html { scroll-behavior: smooth; }

body {
    font-family: 'DM Sans', sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}

/* Animated particles canvas */
#bg-canvas {
    position: fixed; inset: 0;
    z-index: 0; pointer-events: none;
    opacity: 0.55;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 24px;
    position: relative; z-index: 1;
}

/* ─── HEADER ─── */
header {
    position: fixed; top: 0; left: 0; right: 0; z-index: 200;
    padding: 18px 0;
    transition: background .3s, box-shadow .3s, padding .3s;
}
header.scrolled {
    background: rgba(3, 8, 16, 0.88);
    backdrop-filter: blur(20px);
    box-shadow: 0 1px 0 var(--border);
    padding: 14px 0;
}
header .container {
    display: flex; align-items: center; justify-content: space-between;
}

.logo {
    display: flex; align-items: center; gap: 10px;
    font-family: 'Bebas Neue', sans-serif;
    font-size: 1.5rem; letter-spacing: .06em;
    color: var(--white); text-decoration: none;
}
.logo span { color: var(--accent); }
.logo-icon { width: 28px; height: 28px; flex-shrink: 0; }
.footer-logo { font-size: 1.3rem; }

nav ul { display: flex; list-style: none; gap: 36px; }
nav ul li a {
    color: var(--muted);
    text-decoration: none; font-size: .8rem;
    font-weight: 500; letter-spacing: .1em; text-transform: uppercase;
    transition: color .2s;
}
nav ul li a:hover { color: var(--accent); }

.header-cta {
    background: var(--accent); color: var(--bg);
    font-size: .75rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
    padding: .5rem 1.4rem; text-decoration: none;
    clip-path: polygon(7px 0%,100% 0%,calc(100% - 7px) 100%,0% 100%);
    transition: background .2s, transform .15s;
}
.header-cta:hover { background: #7dd3fc; transform: translateY(-1px); }

/* ─── HERO ─── */
.hero {
    min-height: 100vh;
    display: flex; flex-direction: column; justify-content: center;
    padding: 120px 0 60px;
    position: relative; overflow: hidden;
}

.hero-glow {
    position: absolute; border-radius: 50%;
    filter: blur(90px); pointer-events: none;
}
.hero-glow--1 {
    width: 600px; height: 500px;
    background: rgba(0,212,255,.08);
    right: 5%; top: 10%;
}
.hero-glow--2 {
    width: 400px; height: 400px;
    background: rgba(124,58,237,.07);
    left: 10%; bottom: 20%;
}

.hero-container {
    display: grid; grid-template-columns: 1fr 1fr;
    align-items: center; gap: 4rem;
    margin-bottom: 4rem;
}

.hero-badge {
    display: inline-flex; align-items: center; gap: .5rem;
    background: rgba(0,212,255,.08); border: 1px solid rgba(0,212,255,.25);
    color: var(--accent); font-family: 'DM Mono', monospace;
    font-size: .68rem; letter-spacing: .12em; text-transform: uppercase;
    padding: .35rem .9rem; margin-bottom: 1.5rem;
}
.badge-dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--accent);
    animation: pulse 1.8s ease-in-out infinite;
}
@keyframes pulse {
    0%,100% { opacity: 1; transform: scale(1); }
    50%      { opacity: .5; transform: scale(.7); }
}

.hero-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(3.5rem, 6.5vw, 6rem);
    line-height: .95; letter-spacing: .01em;
    color: var(--white); margin-bottom: 1.4rem;
}
.title-accent {
    background: linear-gradient(100deg, var(--accent), var(--accent2));
    -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}

.tagline {
    color: var(--muted); font-size: 1rem; font-weight: 300;
    max-width: 400px; margin-bottom: 2.5rem; line-height: 1.7;
}

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

.btn {
    display: inline-flex; align-items: center; gap: .5rem;
    font-size: .8rem; font-weight: 700; letter-spacing: .08em; text-transform: uppercase;
    padding: .75rem 1.8rem; text-decoration: none; transition: all .2s;
}
.btn--primary {
    background: var(--accent); color: var(--bg);
    clip-path: polygon(8px 0%,100% 0%,calc(100% - 8px) 100%,0% 100%);
}
.btn--primary:hover { background: #7dd3fc; transform: translateY(-2px); }
.btn--ghost {
    border: 1px solid rgba(0,212,255,.25); color: var(--text);
}
.btn--ghost:hover { border-color: var(--accent); color: var(--accent); }

/* Plane visual */
.hero-visual {
    position: relative; display: flex;
    justify-content: center; align-items: center;
    animation: float 4.5s ease-in-out infinite;
}
@keyframes float {
    0%,100% { transform: translateY(0) rotate(-1.5deg); }
    50%      { transform: translateY(-20px) rotate(1.5deg); }
}
.plane-svg { width: min(500px, 100%); filter: drop-shadow(0 0 50px rgba(0,212,255,.22)); }
.plane-orbit {
    position: absolute; inset: -20px;
    border: 1px dashed rgba(0,212,255,.12);
    border-radius: 50%;
    animation: spin 28s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* Metrics bar */
.hero-metrics {
    display: flex; align-items: center;
    border: 1px solid var(--border);
    background: rgba(11,24,41,.7);
    backdrop-filter: blur(10px);
    overflow: hidden;
}
.metric {
    flex: 1; padding: 1.5rem 1.8rem;
    display: flex; flex-direction: column; gap: .25rem;
}
.metric-val {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2rem; color: var(--accent); letter-spacing: .03em; line-height: 1;
}
.metric-val small { font-size: .9rem; color: var(--muted); letter-spacing: 0; }
.metric-key {
    font-family: 'DM Mono', monospace;
    font-size: .62rem; letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
}
.metric-divider { width: 1px; height: 50px; background: var(--border); flex-shrink: 0; }

/* ─── SPECS ─── */
.specs {
    padding: 100px 0;
    background: var(--bg2);
    position: relative; overflow: hidden; z-index: 1;
}
.specs-bg-label {
    position: absolute; right: -20px; top: 50%; transform: translateY(-50%);
    font-family: 'Bebas Neue', sans-serif; font-size: 11rem;
    color: rgba(0,212,255,.03); line-height: 1; pointer-events: none; user-select: none;
    letter-spacing: .08em;
}

.section-header { margin-bottom: 3.5rem; }
.section-tag {
    font-family: 'DM Mono', monospace; font-size: .68rem;
    letter-spacing: .15em; text-transform: uppercase;
    color: var(--accent); display: block; margin-bottom: .75rem;
}
.section-title {
    font-family: 'Bebas Neue', sans-serif;
    font-size: clamp(2.2rem, 3.5vw, 3.2rem);
    letter-spacing: .03em; line-height: 1; color: var(--white);
    margin-bottom: .75rem;
}
.section-sub { color: var(--muted); font-size: .95rem; max-width: 500px; }

.specs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1.5px;
    background: var(--border);
    border: 1px solid var(--border);
}

.spec-card {
    background: var(--card);
    padding: 2.2rem 2rem;
    position: relative; overflow: hidden;
    transition: background .25s;
    opacity: 0; transform: translateY(24px);
    transition: opacity .6s ease, transform .6s ease, background .25s;
}
.spec-card.revealed { opacity: 1; transform: none; }
.spec-card:nth-child(2) { transition-delay: .1s; }
.spec-card:nth-child(3) { transition-delay: .2s; }
.spec-card:nth-child(4) { transition-delay: .3s; }

.spec-card::after {
    content: '';
    position: absolute; top: 0; left: 0; right: 0; height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent2));
    transform: scaleX(0); transform-origin: left;
    transition: transform .35s ease;
}
.spec-card:hover { background: #121f38; }
.spec-card:hover::after { transform: scaleX(1); }

.spec-card__icon { font-size: 1.5rem; margin-bottom: .7rem; }
.spec-card__label {
    font-family: 'DM Mono', monospace;
    font-size: .63rem; letter-spacing: .12em; text-transform: uppercase;
    color: var(--muted); margin-bottom: .4rem;
}
.spec-card__value {
    font-family: 'Bebas Neue', sans-serif;
    font-size: 2.4rem; color: var(--white); letter-spacing: .03em; line-height: 1;
    margin-bottom: .4rem;
}
.spec-card__value span { font-size: 1rem; color: var(--muted); letter-spacing: 0; }
.spec-card__note { font-size: .78rem; color: var(--muted); line-height: 1.6; }

/* ─── ABOUT ─── */
.about {
    padding: 100px 0;
    background: var(--bg);
    position: relative; z-index: 1;
}

.about-grid {
    display: grid; grid-template-columns: 1fr 1fr;
    gap: 5rem; align-items: start;
}

.about-text[data-reveal],
.about-right[data-reveal] {
    opacity: 0; transform: translateY(24px);
    transition: opacity .7s ease, transform .7s ease;
}
.about-text[data-reveal].revealed,
.about-right[data-reveal].revealed { opacity: 1; transform: none; }
.about-right[data-reveal] { transition-delay: .15s; }

.about-text p {
    color: var(--muted); font-size: .95rem; line-height: 1.8;
    margin-bottom: 1rem;
}
.about-text strong { color: var(--text); font-weight: 600; }

/* Iron triangle */
.iron-triangle {
    margin-top: 2rem;
    background: var(--card);
    border: 1px solid var(--border);
    padding: 1.8rem;
    text-align: center;
}
.iron-triangle svg { width: 100%; max-width: 200px; display: block; margin: .5rem auto; }
.triangle-label { font-family: 'DM Mono', monospace; font-size: .65rem; letter-spacing: .1em; text-transform: uppercase; color: var(--accent); margin-bottom: .2rem; }
.triangle-bottom { display: flex; justify-content: space-between; padding: 0 1rem; }
.triangle-bottom span { font-family: 'DM Mono', monospace; font-size: .62rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }

/* Stat boxes */
.about-right { display: flex; flex-direction: column; gap: 1.2rem; }
.stat-box {
    background: var(--card);
    border: 1px solid var(--border);
    padding: 2rem;
    border-left: 3px solid var(--accent);
    transition: border-color .2s;
}
.stat-box--alt { border-left-color: var(--accent2); }
.stat-box:hover { border-color: rgba(0,212,255,.4); }
.stat-number {
    display: block;
    font-family: 'Bebas Neue', sans-serif; font-size: 3rem;
    color: var(--accent); letter-spacing: .04em; line-height: 1;
}
.stat-box--alt .stat-number { color: var(--accent2); }
.stat-label {
    font-family: 'DM Mono', monospace; font-size: .68rem;
    letter-spacing: .12em; text-transform: uppercase; color: var(--muted);
    margin-bottom: .4rem; display: block;
}
.stat-note { font-size: .8rem; color: var(--muted); line-height: 1.6; }

/* Process list */
.process-list { display: flex; flex-direction: column; gap: 0; }
.process-item {
    display: flex; gap: 1.2rem; align-items: flex-start;
    padding: 1.1rem 0;
    border-bottom: 1px solid var(--border);
}
.process-item:last-child { border-bottom: none; }
.process-num {
    font-family: 'DM Mono', monospace; font-size: .7rem;
    color: var(--accent); letter-spacing: .05em; min-width: 2rem; padding-top: .1rem;
}
.process-item strong { display: block; font-size: .88rem; color: var(--text); margin-bottom: .15rem; font-weight: 600; }
.process-item p { font-size: .8rem; color: var(--muted); line-height: 1.5; }

/* ─── FOOTER ─── */
footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: 3rem 0;
    position: relative; z-index: 1;
}
.footer-inner {
    display: flex; justify-content: space-between;
    align-items: center; flex-wrap: wrap; gap: 2rem;
}
.footer-brand p {
    color: var(--muted); font-size: .82rem; line-height: 1.7; margin-top: .6rem;
}
.footer-meta { text-align: right; }
.footer-meta p {
    color: var(--muted); font-size: .8rem; line-height: 1.8;
    font-family: 'DM Mono', monospace;
}
.footer-meta strong { color: var(--text); }

/* ─── RESPONSIVE ─── */
@media (max-width: 900px) {
    .hero-container { grid-template-columns: 1fr; }
    .hero-visual { display: none; }
    .about-grid { grid-template-columns: 1fr; }
    .hero-metrics { flex-wrap: wrap; }
    .metric { flex: calc(50% - 1px); border-bottom: 1px solid var(--border); }
    .metric-divider { display: none; }
}
@media (max-width: 640px) {
    nav ul { display: none; }
    .footer-inner { flex-direction: column; text-align: center; }
    .footer-meta { text-align: center; }
    .hero-title { font-size: 3rem; }
}

/* ─── THEME OVERRIDES ─── */
:root.light-mode {
    --bg:       #f0f4f8;
    --bg2:      #e2e8f0;
    --surface:  #ffffff;
    --card:     #ffffff;
    --border:   rgba(15, 23, 42, 0.1);
    --text:     #0f172a;
    --muted:    #475569;
}

/* Стили для новых кнопок управления */
.controls { display: flex; gap: 10px; align-items: center; }
.control-btn {
    background: var(--card);
    border: 1px solid var(--border);
    color: var(--text);
    padding: 6px 10px;
    cursor: pointer;
    font-family: 'DM Mono', monospace;
    font-size: 0.7rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}
.control-btn:hover { border-color: var(--accent); color: var(--accent); }
.theme-icon { width: 14px; height: 14px; }

/* Фикс для canvas в светлой теме */
:root.light-mode #bg-canvas { opacity: 0.25; }