:root {
  --bg-page: #f5f5f8;
  --bg-surface: #ffffff;
  --bg-subtle: #ededf4;
  --bg-muted: #f9f9fb;
  --border: #e3e3ec;
  --primary: #5e2bff;
  --primary-hover: #4a1ee0;
  --primary-soft: #f0ebff;
  --teal: #0d9488;
  --teal-soft: #e6f6f4;
  --text-main: #111118;
  --text-sub: #454554;
  --text-muted: #767688;
  --header-bg: rgba(245, 245, 248, 0.9);
  --dropdown-shadow: 0 12px 32px -4px rgba(17, 17, 24, 0.08);
}

body.dark {
  --bg-page: #0c0c12;
  --bg-surface: #14141e;
  --bg-subtle: #1d1d2b;
  --bg-muted: #181824;
  --border: #262638;
  --primary: #7348ff;
  --primary-hover: #8662ff;
  --primary-soft: rgba(115, 72, 255, 0.14);
  --teal: #14b8a6;
  --teal-soft: rgba(20, 184, 166, 0.12);
  --text-main: #f3f3f8;
  --text-sub: #b4b4c6;
  --text-muted: #78788e;
  --header-bg: rgba(12, 12, 18, 0.9);
  --dropdown-shadow: 0 12px 32px -4px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Plus Jakarta Sans', sans-serif; }
body { background: var(--bg-page); color: var(--text-main); line-height: 1.6; transition: background-color 0.2s, color 0.2s; -webkit-font-smoothing: antialiased; min-height: 100vh; display: flex; flex-direction: column; }
a { text-decoration: none; color: inherit; }
.mono { font-family: 'JetBrains Mono', monospace; font-variant-numeric: tabular-nums; }
.container { max-width: 1200px; margin: 0 auto; padding: 0 24px; }

header { position: sticky; top: 0; z-index: 1000; background: var(--header-bg); backdrop-filter: blur(12px); border-bottom: 1px solid var(--border); }
nav { display: flex; justify-content: space-between; align-items: center; height: 68px; position: relative; }
.logo { display: inline-flex; align-items: baseline; font-size: 24px; font-weight: 800; letter-spacing: -0.03em; line-height: 1; user-select: none; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; text-rendering: geometricPrecision; }
.logo-f-icon { width: 14px; height: 18px; display: inline-block; color: var(--text-main); margin-right: 0.5px; transform: translateY(0.5px); flex-shrink: 0; transition: color 0.2s; }
.logo-fow { color: var(--text-main); transition: color 0.2s; }
.logo-mail { color: var(--primary); margin-left: 4px; transition: color 0.2s; }
.nav-center { display: flex; align-items: center; gap: 32px; list-style: none; }
.nav-item { position: relative; }
.nav-link { font-size: 14px; font-weight: 600; color: var(--text-sub); display: inline-flex; align-items: center; gap: 5px; padding: 22px 0; cursor: pointer; transition: color 0.15s; }
.nav-link:hover, .nav-link.active { color: var(--primary); }

.dropdown-panel { position: absolute; top: 100%; left: -16px; width: 380px; background: var(--bg-surface); border: 1px solid var(--border); border-radius: 18px; padding: 10px; box-shadow: var(--dropdown-shadow); display: none; flex-direction: column; gap: 6px; z-index: 1100; }
.nav-item:hover .dropdown-panel { display: flex; }
.dropdown-card { display: flex; align-items: flex-start; gap: 14px; padding: 12px 14px; border-radius: 12px; transition: background-color 0.15s; }
.dropdown-card:hover { background: var(--bg-muted); }
.dropdown-icon { width: 38px; height: 38px; border-radius: 10px; background: var(--primary-soft); color: var(--primary); display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; margin-top: 2px; }
.dropdown-title { font-size: 14px; font-weight: 700; color: var(--text-main); margin-bottom: 3px; }
.dropdown-desc { font-size: 12.5px; color: var(--text-muted); line-height: 1.45; }

.nav-right { display: flex; align-items: center; gap: 10px; }
.desktop-nav-actions { display: flex; align-items: center; gap: 10px; }
.icon-btn { height: 36px; padding: 0 12px; border-radius: 999px; border: 1px solid var(--border); background: var(--bg-surface); color: var(--text-sub); font-size: 12.5px; font-weight: 700; cursor: pointer; display: inline-flex; align-items: center; gap: 6px; transition: border-color 0.15s, color 0.15s; }
.icon-btn:hover { border-color: var(--primary); color: var(--primary); }
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 8px; height: 36px; padding: 0 16px; border-radius: 999px; font-size: 13px; font-weight: 700; cursor: pointer; border: 1px solid transparent; background: var(--primary); color: #fff; transition: background-color 0.15s; }
.btn:hover { background: var(--primary-hover); }

.hamburger-btn { display: none; width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-surface); color: var(--text-main); align-items: center; justify-content: center; cursor: pointer; }
.mobile-drawer { display: none; border-bottom: 1px solid var(--border); background: var(--bg-surface); padding: 16px 20px 22px; flex-direction: column; gap: 8px; }
.mobile-drawer.open { display: flex; }
.mobile-product-group { display: flex; flex-direction: column; border-radius: 14px; background: var(--bg-muted); border: 1px solid var(--border); overflow: hidden; }
.mobile-product-toggle { width: 100%; display: flex; align-items: center; justify-content: space-between; padding: 12px 14px; background: transparent; border: none; font-size: 14.5px; font-weight: 700; color: var(--text-main); cursor: pointer; text-align: left; }
.mobile-product-toggle svg { transition: transform 0.2s ease; color: var(--primary); }
.mobile-product-group.collapsed .mobile-product-toggle svg { transform: rotate(-90deg); }
.mobile-product-sub { display: flex; flex-direction: column; gap: 6px; padding: 8px; border-top: 1px solid var(--border); }
.mobile-product-group.collapsed .mobile-product-sub { display: none; }
.mobile-sub-card { display: flex; align-items: center; gap: 12px; padding: 10px 12px; border-radius: 10px; background: var(--bg-surface); border: 1px solid var(--border); transition: border-color 0.15s; }
.mobile-sub-card:hover { border-color: var(--primary); }
.mobile-sub-icon { width: 34px; height: 34px; border-radius: 8px; background: var(--primary-soft); color: var(--primary); display: inline-flex; align-items: center; justify-content: center; flex-shrink: 0; }
.mobile-sub-title { font-size: 13.5px; font-weight: 700; color: var(--text-main); line-height: 1.25; }
.mobile-sub-desc { font-size: 11.5px; color: var(--text-muted); line-height: 1.35; margin-top: 2px; }
.mobile-link { display: flex; align-items: center; justify-content: space-between; padding: 11px 14px; border-radius: 10px; font-size: 14.5px; font-weight: 600; color: var(--text-main); transition: background-color 0.15s, color 0.15s; }
.mobile-link:hover { background: var(--bg-muted); color: var(--primary); }
.mobile-drawer-controls { display: flex; flex-direction: column; gap: 10px; margin-top: 8px; padding-top: 14px; border-top: 1px solid var(--border); }
.mobile-control-row { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }
.mobile-control-btn { height: 40px; border-radius: 10px; border: 1px solid var(--border); background: var(--bg-muted); color: var(--text-main); font-size: 13px; font-weight: 700; display: inline-flex; align-items: center; justify-content: center; gap: 6px; cursor: pointer; }

.about-wrap { max-width: 920px; margin: 56px auto 72px; padding: 0 24px; }
.section-tag { display: inline-block; font-size: 12px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.06em; color: var(--primary); background: var(--primary-soft); padding: 5px 12px; border-radius: 999px; margin-bottom: 14px; }
.about-wrap h1 { font-size: 38px; font-weight: 800; line-height: 1.18; letter-spacing: -0.03em; margin-bottom: 16px; }
.about-wrap h1 span { color: var(--primary); }
.lead-text { font-size: 16px; color: var(--text-sub); margin-bottom: 36px; }

.card { background: var(--bg-surface); border: 1px solid var(--border); border-radius: 20px; padding: 30px; margin-bottom: 22px; }
.card h2 { font-size: 20px; font-weight: 800; margin-bottom: 12px; letter-spacing: -0.02em; }
.card p { font-size: 14.5px; color: var(--text-sub); margin-bottom: 12px; }
.card p:last-child { margin-bottom: 0; }

.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; margin-bottom: 22px; }
.pillar { background: var(--bg-surface); border: 1px solid var(--border); border-radius: 18px; padding: 24px; }
.pillar-num { font-size: 13px; font-weight: 800; color: var(--primary); margin-bottom: 8px; }
.pillar h3 { font-size: 16.5px; font-weight: 800; margin-bottom: 6px; }
.pillar p { font-size: 13.5px; color: var(--text-sub); }

footer { border-top: 1px solid var(--border); background: var(--bg-muted); padding: 60px 0 36px; font-size: 13.5px; color: var(--text-muted); margin-top: auto; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 1fr; gap: 36px; padding-bottom: 44px; border-bottom: 1px solid var(--border); margin-bottom: 28px; }
.footer-brand p { margin-top: 14px; font-size: 13.5px; color: var(--text-sub); max-width: 320px; line-height: 1.65; }
.footer-socials { display: grid; grid-template-columns: repeat(8, 28px); gap: 8px; margin-top: 18px; }
.social-tile { width: 28px; height: 28px; border-radius: 6px; background: #c2b3ff; color: #ffffff; display: inline-flex; align-items: center; justify-content: center; transition: background-color 0.15s, transform 0.15s, color 0.15s; }
.social-tile:hover { background: var(--primary); color: #ffffff; transform: translateY(-1px); }
body.dark .social-tile { background: rgba(139, 112, 255, 0.28); color: #e4dcff; }
body.dark .social-tile:hover { background: var(--primary); color: #ffffff; }
.footer-col h4, .footer-col-title { font-size: 13px; font-weight: 800; text-transform: uppercase; letter-spacing: 0.05em; color: var(--text-main); margin-bottom: 16px; }
.footer-links { list-style: none; display: flex; flex-direction: column; gap: 10px; }
.footer-links a { color: var(--text-sub); font-weight: 500; transition: color 0.15s; }
.footer-links a:hover { color: var(--primary); }
.footer-bottom { display: flex; justify-content: space-between; align-items: center; flex-wrap: wrap; gap: 16px; font-size: 13px; }

@media (max-width: 900px) {
  .pillars { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 780px) {
  .container, .about-wrap { padding: 0 16px; }
  .nav-center, .desktop-nav-actions { display: none; }
  .hamburger-btn { display: inline-flex; }
  .about-wrap { margin: 36px auto 52px; }
  .about-wrap h1 { font-size: 28px; }
  .card { padding: 22px 18px; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
  .footer-socials { grid-template-columns: repeat(7, 28px); }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}