/* Shared light/dark tokens for caduceus.vivaanshahani.com */

html[data-theme="dark"],
html:not([data-theme]) {
  --base: #0a0b10;
  --surface: #12131b;
  --raised: #1a1c26;
  --line: #2c2f3e;
  --ink: #edeef6;
  --ink-soft: #bec1d1;
  --ink-mute: #8a8ea2;
  --ink-faint: #606478;
  --accent: #7c7cff;
  --gold: #e8c468;
  --teal: #4fe3d0;
  --chrome-bg: rgb(18 19 27 / 0.92);
  --chrome-shadow: 0 8px 24px rgb(0 0 0 / 0.35);
  --hero-glow: rgb(124 124 255 / 0.18);
  color-scheme: dark;
}

html[data-theme="light"] {
  --base: #f4f5fa;
  --surface: #ffffff;
  --raised: #eef0f7;
  --line: #d4d8e8;
  --ink: #12131b;
  --ink-soft: #3d4050;
  --ink-mute: #5c6072;
  --ink-faint: #888ca0;
  --accent: #5a5ae6;
  --gold: #b8860b;
  --teal: #0d9488;
  --chrome-bg: rgb(255 255 255 / 0.92);
  --chrome-shadow: 0 8px 24px rgb(18 19 27 / 0.08);
  --hero-glow: rgb(90 90 230 / 0.12);
  color-scheme: light;
}

.theme-toggle,
.portfolio-back {
  position: fixed;
  top: 16px;
  z-index: 20;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: var(--chrome-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: var(--chrome-shadow);
  transition: border-color 0.15s, color 0.15s, background 0.15s;
}

.theme-toggle {
  left: 16px;
  gap: 2px;
  padding: 3px;
  height: 40px;
  font-size: 0.95rem;
  line-height: 1;
  color: var(--ink-soft);
  cursor: pointer;
}

.theme-toggle:hover {
  border-color: var(--accent);
}

.theme-seg {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 34px;
  height: 32px;
  padding: 0 8px;
  border-radius: 999px;
  opacity: 0.42;
  transition: opacity 0.15s, background 0.15s, color 0.15s;
  pointer-events: none;
}

html[data-theme="light"] .theme-seg-sun {
  opacity: 1;
  color: var(--ink);
  background: var(--raised);
}

html[data-theme="dark"] .theme-seg-moon,
html:not([data-theme]) .theme-seg-moon {
  opacity: 1;
  color: var(--ink);
  background: var(--raised);
}

.portfolio-back {
  right: 16px;
  gap: 7px;
  padding: 8px 14px 8px 12px;
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
}

.portfolio-back:hover {
  color: var(--ink);
  border-color: var(--accent);
}

.portfolio-back .arrow {
  font-size: 1rem;
  line-height: 1;
  opacity: 0.85;
}

@media (max-width: 480px) {
  .theme-toggle {
    left: 12px;
    height: 36px;
  }

  .theme-seg {
    min-width: 30px;
    height: 28px;
    font-size: 0.88rem;
  }

  .portfolio-back {
    top: 12px;
    right: 12px;
    padding: 7px 11px 7px 10px;
    font-size: 0.78rem;
  }
}