/* Base Styles */
:root {
  --bg: #0e1116;
  --surface: #151a22;
  --muted: #96a0b5;
  --text: #eef2f8;
  --primary: #2ea7ff;
  --primary-600: #1b82c7;
  --accent: #19c37d;
  --danger: #ef476f;
  --ring: 0 0 0 3px rgba(46, 167, 255, 0.25);
}

/* Light theme variables */
:root.light {
  --bg: #f7f9fc;
  --surface: #ffffff;
  --muted: #5a6b85;
  --text: #0b1420;
  --primary: #1565c0;
  --primary-600: #0d47a1;
  --accent: #11895e;
  --danger: #c62828;
  --ring: 0 0 0 3px rgba(21, 101, 192, 0.25);
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 600px at 10% -10%, #1a2230 0, transparent 60%),
              radial-gradient(800px 500px at 110% 10%, #132235 0, transparent 50%),
              var(--bg);
  line-height: 1.6;
}

/* Align browser widgets (scrollbars, form controls) with theme */
@media (prefers-color-scheme: dark) { :root { color-scheme: dark; } }
@media (prefers-color-scheme: light) { :root.light { color-scheme: light; } }

.container { width: min(1100px, 92%); margin: 0 auto; }
.sr-only { position: absolute; left: -9999px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: rgba(21, 26, 34, 0.7);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid rgba(255,255,255,0.06);
}
.header-inner {
  display: grid; grid-template-columns: 1fr auto auto; gap: 1rem;
  align-items: center; padding: 0.75rem 0;
}
.brand { display: flex; align-items: center; gap: 0.6rem; }
.logo { font-size: 1.5rem; }
.brand-name { font-size: 1.1rem; margin: 0; }
.main-nav a { color: var(--text); text-decoration: none; margin-right: 1rem; }
.main-nav a:hover { color: var(--primary); }
.lang-switcher select {
  background: var(--surface); color: var(--text); border: 1px solid rgba(255,255,255,0.08);
  padding: 0.4rem 0.6rem; border-radius: 8px;
}
.lang-switcher { display: inline-flex; align-items: center; gap: 0.5rem; }
#theme-toggle { font-size: 1.1rem; line-height: 1; padding: 0.35rem 0.5rem; border-radius: 8px; border: 1px solid rgba(255,255,255,0.08); }
#theme-toggle:hover { background: rgba(255,255,255,0.06); }

/* Hero */
.hero {
  padding: 4rem 0 3rem; text-align: center;
}
.hero-inner h2 { font-size: clamp(1.6rem, 2.4vw, 2.4rem); margin-bottom: 0.6rem; }
.hero .subtitle { color: var(--muted); margin-bottom: 1.2rem; }
.cta-row { display: flex; justify-content: center; gap: 0.75rem; flex-wrap: wrap; }

.btn { border: 1px solid rgba(255,255,255,0.08); border-radius: 10px; padding: 0.6rem 1rem; cursor: pointer; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; }
.btn-primary { background: var(--primary); color: #04121d; font-weight: 600; }
.btn-primary:hover { background: var(--primary-600); }
.btn-outline { background: transparent; color: var(--text); }
.btn-outline:hover { border-color: rgba(255,255,255,0.18); }
.icon-btn { background: transparent; color: var(--text); border: none; cursor: pointer; }
.icon-btn:focus-visible, .btn:focus-visible { outline: none; box-shadow: var(--ring); }

/* Sections */
.section { padding: 2.5rem 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,0.03), transparent); }
.section-title { margin-top: 0; }
.cols { display: grid; grid-template-columns: 1.1fr 1fr; gap: 1.5rem; align-items: start; }
@media (max-width: 800px) { .cols { grid-template-columns: 1fr; } }

.services-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
@media (max-width: 900px) { .services-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } }
.card { background: var(--surface); border: 1px solid rgba(255,255,255,0.06); padding: 1rem; border-radius: 12px; }

.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem; }
.stat { background: var(--surface); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 1rem; text-align: center; }
.stat .number { font-weight: 700; font-size: 1.1rem; }
.stat .label { color: var(--muted); font-size: 0.9rem; }

.map-placeholder { background: #101722; border: 1px dashed rgba(255,255,255,0.12); border-radius: 12px; padding: 2rem; text-align: center; color: var(--muted); }

/* Footer */
.site-footer { border-top: 1px solid rgba(255,255,255,0.06); padding: 1rem 0; color: var(--muted); }
.footer-inner { display: flex; justify-content: center; }

/* Assistant Floating Button */
.assistant-button {
  position: fixed; right: 20px; bottom: 20px; z-index: 100; border-radius: 999px;
  background: linear-gradient(135deg, var(--primary), #63d8ff); color: #062033;
  padding: 0.75rem 1rem; border: none; box-shadow: 0 10px 30px rgba(0,0,0,0.3);
  display: inline-flex; align-items: center; gap: 0.5rem; font-weight: 700;
}
.assistant-button:hover { transform: translateY(-1px); }

/* Assistant Modal */
.assistant-modal { position: fixed; inset: 0; display: grid; place-items: end; padding: 20px; background: rgba(0,0,0,0.4); }
.assistant-modal[hidden] { display: none; }
.assistant-dialog { width: min(420px, 92vw); background: var(--surface); border: 1px solid rgba(255,255,255,0.08); border-radius: 16px; overflow: hidden; box-shadow: 0 10px 40px rgba(0,0,0,0.4); }
.assistant-header { display: flex; justify-content: space-between; align-items: center; padding: 0.75rem 0.9rem; background: linear-gradient(0deg, rgba(255,255,255,0.03), rgba(255,255,255,0.03)); border-bottom: 1px solid rgba(255,255,255,0.06); }
.assistant-tabs { display: grid; grid-template-columns: repeat(4, 1fr); border-bottom: 1px solid rgba(255,255,255,0.06); }
.tab { background: transparent; color: var(--muted); border: none; padding: 0.6rem; cursor: pointer; font-weight: 600; }
.tab.active, .tab[aria-selected="true"] { color: var(--text); border-bottom: 2px solid var(--primary); }
.assistant-content { padding: 0.9rem; }
.panel { min-height: 260px; }
.panel[hidden] { display: none; }

/* Chat */
.chat-window { height: 220px; overflow: auto; background: color-mix(in oklab, var(--surface), black 6%); border: 1px solid rgba(255,255,255,0.06); border-radius: 10px; padding: 0.5rem; display: grid; gap: 0.5rem; align-content: start; }
.message { display: grid; gap: 0.2rem; }
.message .from { font-size: 0.75rem; color: var(--muted); }
.bubble { background: color-mix(in oklab, var(--surface), black 8%); border: 1px solid rgba(255,255,255,0.06); border-radius: 12px; padding: 0.6rem 0.7rem; max-width: 92%; }
.user .bubble { background: color-mix(in oklab, var(--primary), white 75%); color: #062033; border-color: rgba(46,167,255,0.35); justify-self: end; }
.bot .bubble { background: color-mix(in oklab, var(--accent), white 80%); color: #072014; border-color: rgba(25,195,125,0.35); }

.chat-form { display: grid; grid-template-columns: 1fr auto; gap: 0.5rem; margin-top: 0.6rem; }
.chat-input { width: 100%; border-radius: 10px; border: 1px solid rgba(255,255,255,0.12); background: color-mix(in oklab, var(--surface), black 4%); padding: 0.6rem 0.7rem; color: var(--text); }

/* Lists */
.contact-list, .social-list { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.5rem; }
.contact-list a, .social-list a { color: var(--text); text-decoration: none; }
.contact-list a:hover, .social-list a:hover { color: var(--primary); }

/* Animations */
@media (prefers-reduced-motion: no-preference) {
  .assistant-modal { animation: fadeIn 120ms ease-out; }
  .assistant-dialog { animation: slideUp 180ms ease-out; }
}
@keyframes fadeIn { from { opacity: 0 } to { opacity: 1 } }
@keyframes slideUp { from { transform: translateY(8px) } to { transform: translateY(0) } }