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

:root {
  --bg: #0a0a0f; --bg-alt: #111118; --bg-card: #16161f; --bg-input: #1a1a24;
  --border: #2a2a3a; --text: #e8e8f0; --text-muted: #9898b0;
  --accent: #00e5a0; --accent-glow: rgba(0, 229, 160, 0.25);
  --gradient: linear-gradient(135deg, #00e5a0 0%, #00b4d8 100%);
  --radius: 12px; --radius-sm: 8px;
  --font: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --mono: ui-monospace, 'Cascadia Code', 'Source Code Pro', Menlo, Consolas, monospace;
  --header-h: 72px; --topbar-h: 48px;
}

html { scroll-behavior: smooth; }
body { font-family: var(--font); background: var(--bg); color: var(--text); line-height: 1.6; min-height: 100vh; overflow-x: hidden; }

.bg-grid {
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(rgba(0, 229, 160, 0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0, 229, 160, 0.03) 1px, transparent 1px);
  background-size: 60px 60px;
}

.container { width: 100%; max-width: 1120px; margin: 0 auto; padding: 0 24px; position: relative; z-index: 1; }
a { color: inherit; text-decoration: none; }

/* Top bar */
.top-bar { background: #0d0d14; border-bottom: 1px solid var(--border); height: var(--topbar-h); position: relative; z-index: 101; }
.top-bar-inner { display: flex; align-items: center; justify-content: center; gap: 16px; height: 100%; flex-wrap: wrap; }
.top-bar-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 500; }
.top-bar-btns { display: flex; gap: 10px; }
.top-btn { display: inline-flex; align-items: center; padding: 6px 14px; border-radius: 6px; font-size: 0.85rem; font-weight: 600; transition: transform 0.15s, box-shadow 0.2s; }
.top-btn:hover { transform: translateY(-1px); }
.top-btn-yandex { background: #fc3f1d; color: #fff; }
.top-btn-yandex:hover { box-shadow: 0 4px 16px rgba(252, 63, 29, 0.4); }
.top-btn-ru { background: #2563eb; color: #fff; }
.top-btn-ru:hover { box-shadow: 0 4px 16px rgba(37, 99, 235, 0.4); }

/* Header */
.header { position: sticky; top: 0; z-index: 100; background: rgba(10, 10, 15, 0.85); backdrop-filter: blur(16px); border-bottom: 1px solid var(--border); height: var(--header-h); }
.header-inner { display: flex; align-items: center; justify-content: space-between; height: 100%; }
.logo { display: flex; align-items: center; gap: 10px; font-weight: 700; font-size: 1.2rem; letter-spacing: -0.02em; }
.logo-icon { font-family: var(--mono); color: var(--accent); font-size: 1.1rem; background: rgba(0, 229, 160, 0.12); padding: 4px 8px; border-radius: 6px; }
.nav { display: flex; gap: 8px; }
.nav-link { padding: 8px 16px; border-radius: 8px; font-size: 0.95rem; font-weight: 500; color: var(--text-muted); transition: color 0.2s, background 0.2s; }
.nav-link:hover, .nav-link.active { color: var(--text); background: rgba(255, 255, 255, 0.05); }
.nav-link.active { color: var(--accent); }
.burger { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 8px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* Buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; padding: 12px 24px; border-radius: 10px; font-family: var(--font); font-size: 0.95rem; font-weight: 600; cursor: pointer; border: none; transition: transform 0.15s, box-shadow 0.2s; }
.btn:hover { transform: translateY(-1px); }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none; }
.btn-primary { background: var(--gradient); color: #0a0a0f; box-shadow: 0 0 24px var(--accent-glow); }
.btn-primary:hover:not(:disabled) { box-shadow: 0 0 36px var(--accent-glow); }
.btn-ghost { background: transparent; color: var(--text); border: 1px solid var(--border); }
.btn-ghost:hover { border-color: var(--accent); color: var(--accent); }
.btn-lg { padding: 16px 32px; font-size: 1.05rem; }
.btn-full { width: 100%; }

/* Hero */
.hero { padding: 80px 0 100px; text-align: center; }
.hero-badge { display: inline-block; padding: 6px 14px; background: rgba(0, 229, 160, 0.1); border: 1px solid rgba(0, 229, 160, 0.25); border-radius: 100px; font-size: 0.85rem; font-weight: 500; color: var(--accent); margin-bottom: 28px; }
.hero-title { font-size: clamp(2.4rem, 5vw, 3.6rem); font-weight: 700; line-height: 1.15; letter-spacing: -0.03em; margin-bottom: 20px; }
.gradient-text { background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; background-clip: text; }
.hero-desc { max-width: 560px; margin: 0 auto 36px; color: var(--text-muted); font-size: 1.1rem; }
.hero-actions { display: flex; gap: 16px; justify-content: center; flex-wrap: wrap; margin-bottom: 64px; }
.hero-stats { display: flex; justify-content: center; gap: 48px; flex-wrap: wrap; }
.stat { text-align: center; }
.stat-num { display: block; font-size: 1.8rem; font-weight: 700; color: var(--accent); font-family: var(--mono); }
.stat-label { font-size: 0.9rem; color: var(--text-muted); }

/* Sections */
.section { padding: 80px 0; }
.section-alt { background: var(--bg-alt); border-top: 1px solid var(--border); border-bottom: 1px solid var(--border); }
.section-title { font-size: clamp(1.8rem, 3.5vw, 2.4rem); font-weight: 700; letter-spacing: -0.02em; text-align: center; margin-bottom: 12px; }
.section-subtitle { text-align: center; color: var(--text-muted); margin-bottom: 48px; font-size: 1.05rem; }

.cards { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 20px; }
.card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 28px; transition: border-color 0.25s, transform 0.25s, box-shadow 0.25s; }
.card:hover { border-color: rgba(0, 229, 160, 0.4); transform: translateY(-4px); box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3); }
.card-icon { font-size: 2rem; margin-bottom: 16px; }
.card h3 { font-size: 1.15rem; font-weight: 600; margin-bottom: 8px; }
.card p { color: var(--text-muted); font-size: 0.95rem; }

.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 24px; }
.step { padding: 24px; background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); }
.step-num { font-family: var(--mono); font-size: 1.4rem; font-weight: 500; color: var(--accent); opacity: 0.7; margin-bottom: 12px; }
.step h3 { font-size: 1.1rem; margin-bottom: 8px; }
.step p { color: var(--text-muted); font-size: 0.95rem; }

.benefits { display: grid; grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); gap: 24px; max-width: 900px; margin: 0 auto; }
.benefit { display: flex; gap: 16px; align-items: flex-start; }
.benefit-check { flex-shrink: 0; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center; background: rgba(0, 229, 160, 0.15); color: var(--accent); border-radius: 50%; font-weight: 700; font-size: 0.9rem; }
.benefit h3 { font-size: 1.05rem; margin-bottom: 4px; }
.benefit p { color: var(--text-muted); font-size: 0.95rem; }

.cta-section { padding: 60px 0 100px; }
.cta-box { background: var(--bg-card); border: 1px solid var(--border); border-radius: 20px; padding: 56px 40px; text-align: center; position: relative; overflow: hidden; }
.cta-box::before { content: ''; position: absolute; top: -50%; left: -50%; width: 200%; height: 200%; background: radial-gradient(circle at center, rgba(0, 229, 160, 0.08) 0%, transparent 50%); pointer-events: none; }
.cta-box h2 { font-size: 1.8rem; margin-bottom: 10px; position: relative; }
.cta-box p { color: var(--text-muted); margin-bottom: 28px; position: relative; }
.cta-box .btn { position: relative; }

/* Order */
.order-section { padding-top: 48px; padding-bottom: 80px; }
.order-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: start; }
.order-benefits { list-style: none; margin-bottom: 32px; }
.order-benefits li { display: flex; align-items: center; gap: 12px; padding: 10px 0; color: var(--text-muted); }
.order-benefits span { color: var(--accent); font-weight: 700; }
.order-note { background: rgba(0, 229, 160, 0.06); border: 1px solid rgba(0, 229, 160, 0.2); border-radius: var(--radius-sm); padding: 16px 20px; font-size: 0.9rem; color: var(--text-muted); }
.order-note strong { color: var(--accent); }
.order-form { background: var(--bg-card); border: 1px solid var(--border); border-radius: 16px; padding: 32px; }
.form-group { margin-bottom: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group label { display: block; font-size: 0.9rem; font-weight: 500; margin-bottom: 8px; color: var(--text-muted); }
.form-group input, .form-group select, .form-group textarea {
  width: 100%; padding: 12px 16px; background: var(--bg-input); border: 1px solid var(--border);
  border-radius: var(--radius-sm); color: var(--text); font-family: var(--font); font-size: 0.95rem;
  transition: border-color 0.2s, box-shadow 0.2s; outline: none;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-glow); }
.form-group input::placeholder, .form-group textarea::placeholder { color: #555570; }
.form-group select { cursor: pointer; appearance: none; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%239898b0' d='M6 8L1 3h10z'/%3E%3C/svg%3E"); background-repeat: no-repeat; background-position: right 16px center; padding-right: 40px; }
.form-group select option { background: var(--bg-card); color: var(--text); }
.form-group textarea { resize: vertical; min-height: 80px; }
.form-privacy { text-align: center; font-size: 0.8rem; color: var(--text-muted); margin-top: 16px; }
.form-success { text-align: center; padding: 40px 20px; }
.form-success .success-icon { font-size: 3rem; margin-bottom: 16px; color: var(--accent); }
.form-success h3 { font-size: 1.4rem; margin-bottom: 8px; }
.form-success p { color: var(--text-muted); }

/* Footer */
.footer { border-top: 1px solid var(--border); padding-top: 48px; background: var(--bg-alt); }
.footer-inner { display: grid; grid-template-columns: 2fr 1fr 1.5fr; gap: 40px; padding-bottom: 40px; }
.footer-brand p { color: var(--text-muted); font-size: 0.9rem; margin-top: 12px; }
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-muted); font-size: 0.95rem; transition: color 0.2s; }
.footer-links a:hover { color: var(--accent); }
.footer-contacts p { color: var(--text-muted); font-size: 0.95rem; margin-bottom: 6px; }
.footer-bottom { border-top: 1px solid var(--border); padding: 20px 0; font-size: 0.85rem; color: var(--text-muted); text-align: center; }

@media (max-width: 768px) {
  .top-bar { height: auto; padding: 10px 0; }
  .top-bar-inner { flex-direction: column; gap: 8px; }
  .nav { display: none; position: absolute; top: var(--header-h); left: 0; right: 0; background: var(--bg-alt); border-bottom: 1px solid var(--border); flex-direction: column; padding: 16px; gap: 4px; }
  .nav.open { display: flex; }
  .burger { display: flex; }
  .hero { padding: 48px 0 64px; }
  .hero-stats { gap: 28px; }
  .section { padding: 56px 0; }
  .order-grid { grid-template-columns: 1fr; gap: 32px; }
  .form-row { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 28px; }
  .cta-box { padding: 40px 24px; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { width: 100%; }
  .top-btn { padding: 6px 12px; font-size: 0.8rem; }
}

/* Form validation & errors */
.is-invalid {
  border-color: #ff4d6a !important;
  box-shadow: 0 0 0 3px rgba(255, 77, 106, 0.2) !important;
}

.field-error {
  color: #ff6b81;
  font-size: 0.8rem;
  margin-top: 6px;
}

.form-error-banner {
  background: rgba(255, 77, 106, 0.12);
  border: 1px solid rgba(255, 77, 106, 0.4);
  color: #ff8a9b;
  border-radius: 8px;
  padding: 12px 16px;
  margin-bottom: 20px;
  font-size: 0.9rem;
  line-height: 1.4;
}

/* Products page */
.product-cats {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
  margin-bottom: 36px;
}

.cat-btn {
  padding: 8px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: var(--bg-card);
  color: var(--text-muted);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s, background 0.2s;
}

.cat-btn:hover {
  color: var(--text);
  border-color: rgba(0, 229, 160, 0.4);
}

.cat-btn.active {
  color: #0a0a0f;
  background: var(--gradient);
  border-color: transparent;
  font-weight: 600;
}

.product-grid {
  margin-top: 8px;
}

.product-card {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  color: inherit;
}

.product-badge {
  display: inline-block;
  align-self: flex-start;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--accent);
  background: rgba(0, 229, 160, 0.12);
  margin-bottom: 12px;
}

.product-specs {
  list-style: none;
  margin: 8px 0 16px;
  padding: 0;
  flex-grow: 1;
}

.product-specs li {
  color: var(--text-muted);
  font-size: 0.9rem;
  padding: 3px 0;
  padding-left: 14px;
  position: relative;
}

.product-specs li::before {
  content: '·';
  position: absolute;
  left: 0;
  color: var(--accent);
  font-weight: 700;
}

.product-link {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  margin-top: auto;
}

/* Advanced product filters */
.filter-panel {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 20px 24px;
  margin-bottom: 32px;
}

.filter-search {
  margin-bottom: 16px;
}

.filter-search input {
  width: 100%;
  padding: 12px 16px;
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 0.95rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.filter-search input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow);
}

.filter-search input::placeholder {
  color: #555570;
}

.filter-row {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.filter-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
}

.filter-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  min-width: 48px;
}

.filter-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 16px;
  padding-top: 14px;
  border-top: 1px solid var(--border);
  font-size: 0.9rem;
  color: var(--text-muted);
}

.filter-reset {
  background: none;
  border: none;
  color: var(--accent);
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  padding: 4px 0;
}

.filter-reset:hover {
  text-decoration: underline;
}

.filter-empty {
  text-align: center;
  color: var(--text-muted);
  padding: 40px 20px;
  font-size: 1.05rem;
}

@media (max-width: 768px) {
  .filter-label {
    width: 100%;
    min-width: 0;
  }
}

.product-img-wrap {
  width: 100%;
  height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: #0d0d14;
  border-radius: 8px;
  margin-bottom: 12px;
  overflow: hidden;
}

.product-img {
  max-width: 100%;
  max-height: 110px;
  width: auto;
  height: auto;
  object-fit: contain;
}