:root {
  color-scheme: dark;
  --bg: #0f172a;
  --fg: #e2e8f0;
  --muted: #94a3b8;
  --border: rgba(148, 163, 184, .15);
  --surface: rgba(15, 23, 42, .88);
  --surface-weak: rgba(255, 255, 255, .06);
  --card: #111827;
  --shadow: 0 10px 30px rgba(0, 0, 0, .28);
  --accent: #0d6efd;
  --transition: .25s ease;
}

@media (prefers-color-scheme: light) {
  :root:not([data-theme="dark"]) {
    color-scheme: light;
    --bg: #f8fafc;
    --fg: #0f172a;
    --muted: #64748b;
    --border: rgba(15, 23, 42, .12);
    --surface: rgba(255, 255, 255, .9);
    --surface-weak: rgba(15, 23, 42, .04);
    --card: #fff;
    --shadow: 0 10px 30px rgba(15, 23, 42, .08);
  }
}

:root[data-theme="light"] {
  color-scheme: light;
  --bg: #f8fafc;
  --fg: #0f172a;
  --muted: #64748b;
  --border: rgba(15, 23, 42, .12);
  --surface: rgba(255, 255, 255, .9);
  --surface-weak: rgba(15, 23, 42, .04);
  --card: #fff;
  --shadow: 0 10px 30px rgba(15, 23, 42, .08);
}

:root[data-theme="dark"] {
  color-scheme: dark;
  --bg: #0f172a;
  --fg: #e2e8f0;
  --muted: #94a3b8;
  --border: rgba(148, 163, 184, .15);
  --surface: rgba(15, 23, 42, .88);
  --surface-weak: rgba(255, 255, 255, .06);
  --card: #111827;
  --shadow: 0 10px 30px rgba(0, 0, 0, .28);
}

html { scroll-behavior: smooth; }

body {
  min-height: 100vh;
  background: radial-gradient(1200px 600px at 20% -10%, var(--surface-weak), transparent), var(--bg);
  color: var(--fg);
  transition: background var(--transition), color var(--transition);
}

.navbar {
  background: var(--surface);
  color: var(--fg);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(8px);
}

.navbar-brand,
.navbar .nav-link { color: var(--fg); }

.navbar-brand:hover,
.navbar .nav-link:hover,
.navbar .nav-link:focus { color: var(--fg); }

.navbar .nav-link.active {
  color: var(--fg);
  font-weight: 600;
}

.navbar-toggler { border-color: var(--border); }
.navbar-toggler-icon { filter: invert(1); }
:root[data-theme="light"] .navbar-toggler-icon { filter: none; }

.btn-outline-soft {
  color: var(--fg);
  border: 1px solid var(--border);
}

.btn-outline-soft:hover,
.btn-outline-soft:focus {
  color: var(--fg);
  background: var(--surface-weak);
  border-color: var(--muted);
}

.hero { padding: 5rem 0 2rem; }
.page-title { color: var(--fg); font-weight: 800; letter-spacing: -.02em; }
.section-title { color: var(--fg); font-weight: 750; }
.muted { color: var(--muted) !important; }

.badge-soft {
  color: var(--fg);
  background: var(--surface-weak);
  border: 1px solid var(--border);
}

.card-soft {
  color: var(--fg);
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 1rem;
  box-shadow: var(--shadow);
  transition: background var(--transition), border-color var(--transition), box-shadow var(--transition);
}

.skill-card { height: 100%; }
.skill-card h2 { color: var(--fg); font-weight: 700; }
.skill-card p { min-height: 3rem; }
.skill-icon { font-size: 2rem; line-height: 1; }
.skill-list { padding-left: 1.2rem; color: var(--muted); }
.skill-list li + li { margin-top: .35rem; }

.timeline {
  position: relative;
  margin-left: .5rem;
}

.timeline::before {
  position: absolute;
  top: 0;
  bottom: 2rem;
  left: 10px;
  width: 2px;
  background: var(--border);
  content: "";
}

.timeline-item {
  position: relative;
  padding: 0 0 1.5rem 2.5rem;
}

.timeline-dot {
  position: absolute;
  top: .35rem;
  left: 3px;
  width: 16px;
  height: 16px;
  border: 3px solid var(--card);
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 1px var(--border);
}

.timeline-item .card-soft h3 { color: var(--fg); }

.site-footer {
  width: 100%;
  margin-top: 3rem;
  padding: 1rem 0;
  color: var(--muted);
  background: var(--surface-weak);
  border-top: 1px solid var(--border);
}

@media (max-width: 767.98px) {
  .hero { padding: 3rem 0 1.5rem; }
  .navbar .nav-item > .btn { width: 100%; margin-top: .35rem; }
  .navbar .dropdown-menu { width: 100%; }
  .skill-card p { min-height: 0; }
}