/* ─── Liquid Glass ──────────────────────────────────────────────
   Extracted from hermes-mail's liquid-glass.css (dark theme, unmodified
   values) plus a NEW light-theme variant built for this kit — nothing
   like a light liquid-glass treatment existed anywhere in this ecosystem
   before. Needs a colorful, moving backdrop behind it (see .ambient-blob
   below) — blurring a flat single-tone background reads as plain frosted
   plastic, not glass, in EITHER theme.

   Why light glass isn't just "the same rules, lighter colors": on a dark
   backdrop, a faint white fill (~10% opacity) already reads as a distinct
   raised layer, and a near-invisible dark rim on the shadowed corner is
   enough — the darkness of the backdrop itself does most of the contrast
   work. On a light/ivory backdrop that trick disagrees with itself: a
   faint white fill nearly disappears (low contrast against near-white),
   and an invisible dark rim gives the surface no edge at all. So the
   light variant needs (a) a visibly higher-opacity white fill to read as
   "extra" material on top of an already-pale background, and (b) an
   actual visible warm-ink rim on the shadowed corner instead of a barely-
   there one, to give the panel a real boundary. Same layering structure
   (fill + inset rim-light/rim-dark + outer shadow + specular sheen) in
   both themes — only the token values differ. */

:root {
  --glass-fill:       linear-gradient(165deg, rgba(255, 255, 255, 0.55), rgba(255, 255, 255, 0.28) 40%, rgba(37, 122, 111, 0.10) 100%);
  --glass-fill-hover: linear-gradient(165deg, rgba(255, 255, 255, 0.68), rgba(255, 255, 255, 0.35) 40%, rgba(37, 122, 111, 0.14) 100%);
  --glass-rim-light:  rgba(255, 255, 255, 0.9);
  --glass-rim-dark:   rgba(43, 39, 34, 0.12);
  --glass-border:     rgba(37, 122, 111, 0.14);
  --glass-sheen:      rgba(255, 255, 255, 0.4);
  --glass-shadow-1:   0 12px 40px rgba(43, 39, 34, 0.16);
  --glass-shadow-2:   0 2px 8px rgba(43, 39, 34, 0.10);
  --glass-shadow-hover-1: 0 18px 48px rgba(43, 39, 34, 0.2);

  /* theme-invariant sizing, declared once */
  --glass-blur:       28px;
  --glass-radius:     26px;
  --glass-radius-sm:  18px;
}

:root[data-theme='dark'] {
  /* unmodified extraction from hermes-mail's liquid-glass.css */
  --glass-fill:       linear-gradient(165deg, rgba(255, 255, 255, 0.10), rgba(255, 255, 255, 0.02) 40%, rgba(99, 102, 241, 0.06) 100%);
  --glass-fill-hover: linear-gradient(165deg, rgba(255, 255, 255, 0.14), rgba(255, 255, 255, 0.03) 40%, rgba(99, 102, 241, 0.09) 100%);
  --glass-rim-light:  rgba(255, 255, 255, 0.55);
  --glass-rim-dark:   rgba(255, 255, 255, 0.06);
  --glass-border:     rgba(255, 255, 255, 0.08);
  --glass-sheen:      rgba(255, 255, 255, 0.16);
  --glass-shadow-1:   0 12px 40px rgba(0, 0, 0, 0.45);
  --glass-shadow-2:   0 2px 8px rgba(0, 0, 0, 0.25);
  --glass-shadow-hover-1: 0 18px 48px rgba(0, 0, 0, 0.5);
}

/* ─── Ambient backdrop ──────────────────────────────────────────
   Fixed, blurred, slowly-drifting color blobs behind the glass UI. Pure
   CSS, no canvas. Colors come from the accent tokens, so this repaints
   correctly per theme with no changes needed here. */
.ambient-layer {
  position: fixed;
  inset: 0;
  z-index: -1;
  overflow: hidden;
  pointer-events: none;
}

.ambient-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  animation: ambientDrift 22s ease-in-out infinite alternate;
}

.ambient-blob.b1 {
  width: 520px; height: 520px;
  top: -120px; left: -80px;
  background: radial-gradient(circle, var(--clr-accent), transparent 70%);
  animation-duration: 26s;
}
.ambient-blob.b2 {
  width: 460px; height: 460px;
  top: 20%; right: -140px;
  background: radial-gradient(circle, var(--clr-accent-2), transparent 70%);
  animation-duration: 30s;
  animation-delay: -6s;
}
.ambient-blob.b3 {
  width: 420px; height: 420px;
  bottom: -160px; left: 30%;
  background: radial-gradient(circle, var(--clr-accent-3), transparent 70%);
  animation-duration: 24s;
  animation-delay: -12s;
}

@keyframes ambientDrift {
  from { transform: translate(0, 0) scale(1); }
  to   { transform: translate(60px, 40px) scale(1.15); }
}

/* ─── Core glass surface ────────────────────────────────────────
   Applied to any panel/card/button that should read as "liquid glass".
   Layers: blurred+saturated backdrop, a soft gradient fill (not flat
   rgba — gives the fake-refraction depth), a bright inset rim top-left
   fading to a rim bottom-right (light source cue — dark and light on the
   opposite corner respectively, see file header), and an outer bloom
   shadow for elevation. */
.glass {
  position: relative;
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border-radius: var(--glass-radius);
  border: 1px solid var(--glass-border);
  box-shadow:
    inset 1px 1px 1px var(--glass-rim-light),
    inset -1px -1px 1px var(--glass-rim-dark),
    var(--glass-shadow-1),
    var(--glass-shadow-2);
  overflow: hidden;
  transition: var(--transition);
}

/* Specular sheen — a soft diagonal light streak, swept in from the
   top-left on hover to sell the "light passing over glass" feel. */
.glass::before {
  content: '';
  position: absolute;
  inset: -60% -60% auto auto;
  width: 140%;
  height: 140%;
  background: linear-gradient(115deg, var(--glass-sheen) 0%, rgba(255, 255, 255, 0) 32%);
  transform: translate(-30%, -30%);
  opacity: 0;
  transition: opacity 0.5s ease, transform 0.9s cubic-bezier(0.16, 1, 0.3, 1);
  pointer-events: none;
}

.glass:hover::before {
  opacity: 1;
  transform: translate(0%, 0%);
}

.glass-interactive {
  cursor: pointer;
}
.glass-interactive:hover {
  background: var(--glass-fill-hover);
  transform: translateY(-2px);
  box-shadow:
    inset 1px 1px 1px var(--glass-rim-light),
    inset -1px -1px 1px var(--glass-rim-dark),
    var(--glass-shadow-hover-1),
    0 0 0 1px var(--glass-border);
}
.glass-interactive:active {
  transform: translateY(0) scale(0.99);
}

.glass-sm {
  border-radius: var(--glass-radius-sm);
}

/* ─── Glass button ──────────────────────────────────────────────
   Same material as .glass but sized/shaped like a pill button. Use in
   place of .btn-ghost where the surface should read as glass rather
   than a flat outline. */
.glass-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 22px;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--clr-text);
  background: var(--glass-fill);
  backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  -webkit-backdrop-filter: blur(var(--glass-blur)) saturate(180%);
  border: 1px solid var(--glass-border);
  box-shadow:
    inset 1px 1px 1px var(--glass-rim-light),
    inset -1px -1px 1px var(--glass-rim-dark),
    0 6px 20px var(--glass-shadow-2);
  cursor: pointer;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}
.glass-btn:hover {
  transform: translateY(-2px);
  background: var(--glass-fill-hover);
  box-shadow:
    inset 1px 1px 1px var(--glass-rim-light),
    inset -1px -1px 1px var(--glass-rim-dark),
    var(--glass-shadow-hover-1);
}
.glass-btn:active { transform: translateY(0) scale(0.98); }

.glass-btn.glass-btn-accent {
  color: #fff;
  background: linear-gradient(165deg, color-mix(in srgb, var(--clr-accent) 55%, transparent), color-mix(in srgb, var(--clr-accent-2) 35%, transparent));
  border-color: color-mix(in srgb, var(--clr-accent-2) 40%, transparent);
}
.glass-btn.glass-btn-accent:hover {
  background: linear-gradient(165deg, color-mix(in srgb, var(--clr-accent) 70%, transparent), color-mix(in srgb, var(--clr-accent-2) 50%, transparent));
}