/* ── Google Font loaded via <link> in HTML for faster parallel download ── */

/* =============================================
   APPLE-STYLE DESIGN SYSTEM
   ============================================= */
:root {
  --bg:        #0a0e1a;
  --surface:   rgba(16,22,40,0.55);
  --surface2:  rgba(20,28,50,0.45);
  --border:    rgba(255,255,255,0.06);
  --border-h:  rgba(255,255,255,0.12);
  --accent:    #0ad0ff;
  --accent2:   #a78bfa;
  --accent3:   #34d399;
  --text:      #f1f5f9;
  --muted:     rgba(148,163,184,0.75);
  --radius:    16px;
  --transition: 0.4s cubic-bezier(0.25,0.46,0.45,0.94);
  --spring:    0.5s cubic-bezier(0.34,1.56,0.64,1);
  --glow:  0 0 24px rgba(10,208,255,0.2);
  --glow2: 0 0 24px rgba(167,139,250,0.2);
  --glass: saturate(1.8) blur(24px);
  --shadow: 0 8px 32px rgba(0,0,0,0.3);
  --shadow-sm: 0 2px 12px rgba(0,0,0,0.2);

  /* grid accent for themed grid dots */
  --grid-accent: rgba(255,255,255,0.02);
}

/* ── THEMES ───────────────────────────────────────── */
[data-theme="purple"] {
  --accent:  #bf5af2;
  --accent2: #0ad0ff;
  --glow:  0 0 24px rgba(191,90,242,0.2);
  --glow2: 0 0 24px rgba(10,208,255,0.2);
  --grid-accent: rgba(191,90,242,0.02);
}
[data-theme="green"] {
  --accent:  #34d399;
  --accent2: #0ad0ff;
  --glow:  0 0 24px rgba(52,211,153,0.2);
  --glow2: 0 0 24px rgba(10,208,255,0.2);
  --grid-accent: rgba(52,211,153,0.02);
}
[data-theme="orange"] {
  --accent:  #f97316;
  --accent2: #a78bfa;
  --glow:  0 0 24px rgba(249,115,22,0.2);
  --glow2: 0 0 24px rgba(167,139,250,0.2);
  --grid-accent: rgba(249,115,22,0.02);
}

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

html {
  scroll-behavior: smooth;
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  min-height: 100vh;
  cursor: none;
  transition: background .5s var(--transition), color .5s var(--transition);
}

/* Subtle dot grid background */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: radial-gradient(circle, var(--grid-accent) 1px, transparent 1px);
  background-size: 32px 32px;
  pointer-events: none;
}

/* Ambient gradient blobs */
body::after {
  content: '';
  position: fixed;
  inset: 0;
  z-index: -1;
  background:
    radial-gradient(ellipse at 25% 15%, rgba(10,208,255,0.04) 0%, transparent 55%),
    radial-gradient(ellipse at 75% 85%, rgba(167,139,250,0.03) 0%, transparent 55%);
  pointer-events: none;
}

/* Override grid for themes */
[data-theme="purple"] body::before { background-image: radial-gradient(circle, var(--grid-accent) 1px, transparent 1px); }
[data-theme="green"] body::before { background-image: radial-gradient(circle, var(--grid-accent) 1px, transparent 1px); }
[data-theme="orange"] body::before { background-image: radial-gradient(circle, var(--grid-accent) 1px, transparent 1px); }

/* =====================
   CUSTOM CURSOR
   ===================== */
.cursor-dot {
  position: fixed;
  width: 6px; height: 6px;
  background: var(--accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%,-50%);
  box-shadow: 0 0 10px var(--accent), 0 0 20px var(--accent);
  transition: width .2s, height .2s, background .2s;
}
.cursor-ring {
  position: fixed;
  width: 32px; height: 32px;
  border: 1px solid rgba(10,208,255,0.35);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%,-50%);
  transition: all .2s;
}
body.cursor-hover .cursor-dot { width: 10px; height: 10px; background: var(--accent2); }
body.cursor-hover .cursor-ring { border-color: rgba(167,139,250,0.5); width: 44px; height: 44px; }

/* =====================
   SCROLL PROGRESS
   ===================== */
#scroll-progress {
  position: fixed;
  top: 0; left: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  z-index: 200;
  width: 0%;
  transition: width .08s;
}

/* =====================
   PAGE TRANSITION
   ===================== */
#page-overlay {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 9000;
  pointer-events: none;
  opacity: 1;
  transition: opacity 0.5s ease;
  animation: overlay-fade 0.6s ease 0.8s forwards;
}
@keyframes overlay-fade { to { opacity: 0; } }
#page-overlay.hidden { opacity: 0; animation: none; }
#page-overlay.leaving { opacity: 1; animation: none; }

/* =====================
   NAVIGATION — Glass
   ===================== */
nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 48px;
  background: rgba(10,14,26,0.6);
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
  border-bottom: 1px solid var(--border);
  transition: all var(--transition);
}

nav::after { display: none; }

.nav-logo {
  font-size: 1.05rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  color: var(--text);
  text-decoration: none;
  text-transform: uppercase;
}
.nav-logo span { color: var(--accent); }

.nav-links { display: flex; gap: 28px; list-style: none; }

.nav-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px; left: 0;
  width: 0; height: 2px;
  background: var(--accent);
  border-radius: 1px;
  transition: width var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--text); }
.nav-links a:hover::after, .nav-links a.active::after { width: 100%; }

.burger { display:none; flex-direction:column; gap:5px; cursor:pointer; background:none; border:none; padding:4px; z-index:200; }
.burger span { display:block; width:22px; height:1.5px; background:var(--text); transition:var(--transition); border-radius:2px; }

/* ── Controls (lang + theme) ── */
.nav-controls {
  display: flex; align-items: center; gap: 14px; margin-left: 20px;
}
.lang-btns { display: flex; gap: 3px; }
.lang-btn {
  background: transparent; border: 1px solid var(--border);
  color: var(--muted); font-size: .68rem; font-weight: 600;
  letter-spacing: .06em; padding: 5px 10px; border-radius: 10px;
  cursor: pointer; text-transform: uppercase;
  transition: all var(--transition);
  font-family: inherit;
}
.lang-btn:hover, .lang-btn.active {
  color: var(--accent); border-color: var(--accent);
  background: rgba(10,208,255,0.06);
}
.nav-sep { width: 1px; height: 16px; background: var(--border); }
.theme-dots { display: flex; gap: 6px; align-items: center; }
.theme-dot {
  width: 14px; height: 14px; border-radius: 50%;
  border: 2px solid transparent; cursor: pointer;
  padding: 0; transition: all var(--transition);
}
.theme-dot:hover { transform: scale(1.25); }
.theme-dot.active { border-color: rgba(255,255,255,0.5); transform: scale(1.15); }
.theme-dot.t-cyan   { background: #0ad0ff; }
.theme-dot.t-purple { background: #bf5af2; }
.theme-dot.t-green  { background: #34d399; }
.theme-dot.t-orange { background: #f97316; }
.theme-dot.t-custom { border:1px solid rgba(255,255,255,0.25); }

/* =====================
   COMMON COMPONENTS
   ===================== */
.container { max-width: 1080px; margin: 0 auto; padding: 0 48px; }

.section-label {
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 800;
  line-height: 1.12;
  margin-bottom: 18px;
  letter-spacing: -0.025em;
}

.section-desc {
  color: var(--muted);
  max-width: 600px;
  font-size: 1rem;
  margin-bottom: 56px;
  line-height: 1.8;
}

.divider {
  width: 100%;
  height: 1px;
  background: var(--border);
}

/* Buttons — Apple-style */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 30px;
  border-radius: 14px;
  font-size: 0.86rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all var(--transition);
  position: relative;
}

.btn:hover { transform: translateY(-2px) scale(1.02); }
.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent);
  color: #000;
  box-shadow: 0 4px 20px rgba(10,208,255,0.3);
}
.btn-primary:hover {
  box-shadow: 0 8px 32px rgba(10,208,255,0.4);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.btn-ghost:hover {
  border-color: var(--border-h);
  box-shadow: var(--shadow-sm);
}

/* Cards — glass */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  -webkit-backdrop-filter: blur(16px);
  backdrop-filter: blur(16px);
  transition: all var(--transition);
}
.card:hover {
  border-color: var(--border-h);
  box-shadow: var(--shadow-sm);
  transform: translateY(-2px);
}

/* Fade-in animation */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s cubic-bezier(0.25,0.46,0.45,0.94), transform 0.6s cubic-bezier(0.25,0.46,0.45,0.94);
}
.fade-in.visible { opacity: 1; transform: translateY(0); }

/* Skip-to-content (a11y) */
.skip-link {
  position: fixed; top: -100px; left: 16px; z-index: 99999;
  background: var(--accent); color: #000; padding: 10px 20px;
  border-radius: 0 0 12px 12px; font-weight: 700; font-size: .85rem;
  text-decoration: none; letter-spacing: .06em;
  transition: top .2s;
}
.skip-link:focus { top: 0; outline: 2px solid #fff; outline-offset: 2px; }

/* Page wrapper */
.page-wrapper { padding-top: 80px; min-height: 100vh; }

/* Inner page hero */
.page-hero {
  padding: 72px 0 56px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 72px;
}
.page-hero .back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  text-decoration: none;
  font-size: 0.82rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 28px;
  transition: color var(--transition);
}
.page-hero .back-link:hover { color: var(--accent); }

/* =====================
   FOOTER — glass
   ===================== */
footer {
  border-top: 1px solid var(--border);
  padding: 24px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: var(--muted);
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  position: relative;
  background: rgba(10,14,26,0.4);
  -webkit-backdrop-filter: blur(12px);
  backdrop-filter: blur(12px);
}
.admin-link {
  color: var(--muted);
  text-decoration: none;
  font-size: 1rem;
  opacity: 0.25;
  transition: opacity var(--transition);
  margin-left: 8px;
}
.admin-link:hover { opacity: 1; color: var(--accent); }

/* =====================
   MOBILE
   ===================== */
@media (max-width: 768px) {
  body { cursor: auto; }
  .cursor-dot, .cursor-ring { display: none; }
  nav { padding: 14px 20px; }
  .container { padding: 0 20px; }

  /* Mobile fullscreen menu */
  .nav-links {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    width: 100%; height: 100vh; min-height: 100vh;
    background: rgba(10,14,26,0.95);
    -webkit-backdrop-filter: var(--glass);
    backdrop-filter: var(--glass);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 28px;
    font-size: 1.1rem;
    overflow-y: auto;
    padding: 90px 24px 120px;
    z-index: 150;
    box-sizing: border-box;
  }
  .nav-links.open { display: flex; }
  .burger { display: flex; z-index: 200; }

  /* Controls inside burger overlay */
  .nav-controls { display: none; }
  .nav-controls.in-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 20px;
    margin-top: auto;
    padding-top: 24px;
  }
  .nav-controls.in-menu .nav-sep { display: none; }
  .nav-controls.in-menu .lang-btns { gap: 8px; }
  .nav-controls.in-menu .lang-btn { font-size: .85rem; padding: 8px 14px; }
  .nav-controls.in-menu .theme-dots { gap: 10px; }
  .nav-controls.in-menu .theme-dot { width: 26px; height: 26px; }

  footer { flex-direction: column; gap: 8px; text-align: center; padding: 24px 20px; }
}

/* =====================
   KEYBOARD FOCUS
   ===================== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
  border-radius: 8px;
}
a:focus-visible, button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 4px;
}
.nav-card:focus-visible, .interest-card:focus-visible, .contact-card:focus-visible {
  outline-offset: 4px;
  box-shadow: var(--shadow-sm);
}

/* =====================
   BACK TO TOP
   ===================== */
.back-to-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--surface);
  border: 1px solid var(--border);
  color: var(--accent);
  font-size: 1.1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: all var(--transition);
  z-index: 90;
  -webkit-backdrop-filter: var(--glass);
  backdrop-filter: var(--glass);
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  border-color: var(--border-h);
  box-shadow: var(--shadow-sm);
  transform: scale(1.08);
}
@media (max-width: 768px) {
  .back-to-top { bottom: 20px; right: 20px; width: 40px; height: 40px; }
}

/* =====================
   PRINT STYLES
   ===================== */
@media print {
  body { background: #fff !important; color: #000 !important; cursor: auto !important; }
  body::before, body::after { display: none !important; }
  canvas, .cursor-dot, .cursor-ring, #scroll-progress,
  .back-to-top, #page-overlay, .sw-ring,
  .hero-actions, .nav-controls, .burger { display: none !important; }
  nav { position: static !important; background: none !important; border: none !important; backdrop-filter: none !important; }
  nav::after { display: none !important; }
  .nav-links { gap: 16px !important; }
  .nav-links a { color: #000 !important; }
  .nav-logo span { color: #333 !important; text-shadow: none !important; }
  .container { max-width: 100% !important; padding: 0 20px !important; }
  .hero { min-height: auto !important; padding: 20px 0 !important; }
  .nav-card, .interest-card, .stat-card, .value-item, .contact-card, .now-block, .home-quote, .timeline-item {
    background: #f8f8f8 !important;
    border: 1px solid #ddd !important;
    backdrop-filter: none !important;
    box-shadow: none !important;
    color: #000 !important;
  }
  .stat-card .num { color: #333 !important; text-shadow: none !important; }
  .section-label, .timeline-year { color: #555 !important; background: #eee !important; border-color: #ddd !important; text-shadow: none !important; }
  .section-title { color: #000 !important; }
  .section-desc, p, .timeline-desc { color: #333 !important; }
  a { color: #0066cc !important; }
  footer { border-top: 1px solid #ddd !important; color: #666 !important; }
  footer span { color: #666 !important; }
  .tag, .topic-tag { background: #eee !important; border-color: #ccc !important; color: #333 !important; }
  .fade-in { opacity: 1 !important; transform: none !important; }
  * { animation: none !important; transition: none !important; }
}