:root {
  --bg: #3a3a3c;
  --text: #e8e2dc;
  --accent: #3f8f4f;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  overflow: hidden;
  font-family: system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg) url("/background.png") center 65% / cover no-repeat;
}

#scene {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  display: block;
  cursor: pointer;
}

/* ---------- Loader ---------- */

#loader {
  --p: 0;
  position: fixed;
  inset: 0;
  display: grid;
  place-items: center;
  padding: 16px;
  text-align: center;
  z-index: 10;
  overflow: hidden;
  background: #16231a;
  transition: opacity 0.6s ease, visibility 0.6s;
}
/* The painted meadow, blurred and darkened like a forest at dusk. */
#loader::before {
  content: "";
  position: absolute;
  inset: -40px;
  background: url("/background.png") center 65% / cover no-repeat;
  filter: blur(18px) saturate(1.1);
  opacity: 0.55;
}
#loader::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 50% 45%, rgba(22, 35, 26, 0.2), rgba(10, 18, 12, 0.85) 70%);
}
#loader.done { opacity: 0; visibility: hidden; pointer-events: none; }
#loader.done .loader-card { transform: scale(1.06); }

.loader-card {
  position: relative;
  z-index: 1;
  width: min(340px, 100%);
  padding: 32px 24px 24px;
  border-radius: 24px;
  background: rgba(18, 30, 21, 0.55);
  border: 1px solid rgba(255, 255, 255, 0.08);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(10px);
  transition: transform 0.6s ease;
}

.loader-avatar {
  position: relative;
  width: 132px;
  height: 132px;
  margin: 0 auto;
  display: grid;
  place-items: center;
  animation: loader-bob 3s ease-in-out infinite;
}
.loader-avatar img {
  width: 96px;
  height: 96px;
  border-radius: 50%;
  box-shadow: 0 0 0 3px rgba(255, 255, 255, 0.08), 0 8px 24px rgba(0, 0, 0, 0.4);
}
.loader-ring {
  position: absolute;
  inset: 0;
  transform: rotate(-90deg);
}
.loader-ring circle { fill: none; stroke-width: 5; }
.ring-track { stroke: rgba(255, 255, 255, 0.08); }
.ring-fill {
  stroke: url(#ring-grad);
  stroke-linecap: round;
  stroke-dasharray: 339.3;
  stroke-dashoffset: calc(339.3 * (1 - var(--p)));
  transition: stroke-dashoffset 0.3s ease;
  filter: drop-shadow(0 0 6px rgba(127, 211, 138, 0.5));
}

.loader-title {
  margin: 16px 0 2px;
  font-size: 30px;
  font-weight: 800;
  letter-spacing: 0.04em;
  color: #f4ecd8;
}
.loader-sub {
  margin: 0 0 22px;
  font-size: 13px;
  color: rgba(232, 226, 220, 0.6);
}

/* Archery range: the arrow flies along the track toward the target. */
.range {
  position: relative;
  height: 32px;
  margin: 0 4px;
}
.range-track {
  position: absolute;
  left: 0;
  right: 30px;
  top: 50%;
  height: 4px;
  margin-top: -2px;
  border-radius: 2px;
  background: rgba(255, 255, 255, 0.1);
  overflow: hidden;
}
#loader-fill {
  height: 100%;
  width: calc(var(--p) * 100%);
  background: linear-gradient(90deg, rgba(127, 211, 138, 0.2), #7fd38a);
  transition: width 0.3s ease;
}
.arrow {
  position: absolute;
  top: 50%;
  left: calc(var(--p) * (100% - 76px));
  width: 48px;
  height: 12px;
  margin-top: -6px;
  transition: left 0.3s ease;
}
.target {
  position: absolute;
  right: 0;
  top: 0;
  width: 32px;
  height: 32px;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.4));
}
#loader.hit .target { animation: target-hit 0.4s ease; }

.loader-meta {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 12px;
  margin-top: 16px;
  font-size: 14px;
}
#loader-text {
  color: rgba(232, 226, 220, 0.85);
  text-align: left;
  transition: opacity 0.25s;
}
#loader-text.swap { opacity: 0; }
#loader-pct {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  color: #7fd38a;
}
.loader-size {
  margin: 6px 0 0;
  font-size: 12px;
  text-align: left;
  font-variant-numeric: tabular-nums;
  color: rgba(232, 226, 220, 0.45);
}

#loader.error #loader-text { color: #ffb4a6; }
#loader.error #loader-pct { color: #ffb4a6; }
.loader-retry {
  margin-top: 16px;
  padding: 10px 20px;
  border: 0;
  border-radius: 999px;
  background: var(--accent);
  color: #fff;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
}
.loader-retry:active { transform: scale(0.96); }

@keyframes loader-bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-6px); }
}
@keyframes target-hit {
  0%, 100% { transform: translateX(0) rotate(0); }
  30% { transform: translateX(3px) rotate(6deg); }
  60% { transform: translateX(-1px) rotate(-3deg); }
}

@media (prefers-reduced-motion: reduce) {
  .loader-avatar, #loader.hit .target { animation: none; }
  .ring-fill, #loader-fill, .arrow, .loader-card { transition: none; }
}

/* ---------- Language picker ---------- */

#lang-picker {
  position: fixed;
  top: max(16px, env(safe-area-inset-top));
  right: max(16px, env(safe-area-inset-right));
  z-index: 20; /* above the loader, so it can be changed while loading */
  direction: ltr;
}
#lang-button {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 999px;
  background: rgba(20, 28, 18, 0.6);
  backdrop-filter: blur(8px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.25);
  color: #fff;
  font: inherit;
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.04em;
  cursor: pointer;
  transition: background 0.2s;
}
#lang-button svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.8;
  stroke-linecap: round;
  stroke-linejoin: round;
}
#lang-button .chevron { width: 14px; height: 14px; opacity: 0.7; transition: transform 0.2s; }
#lang-button[aria-expanded="true"] .chevron { transform: rotate(180deg); }
#lang-button:hover { background: rgba(20, 28, 18, 0.8); }
#lang-button:active { transform: scale(0.96); }
#lang-button:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }

#lang-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 220px;
  max-height: min(420px, calc(100vh - 96px));
  margin: 0;
  padding: 6px;
  overflow-y: auto;
  list-style: none;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 16px;
  background: rgba(20, 28, 18, 0.92);
  backdrop-filter: blur(12px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.4);
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.2) transparent;
}
#lang-menu li {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  padding: 9px 12px;
  border-radius: 10px;
  font-size: 14px;
  color: rgba(232, 226, 220, 0.85);
  cursor: pointer;
  outline: none;
}
#lang-menu li:hover,
#lang-menu li:focus-visible { background: rgba(255, 255, 255, 0.08); color: #fff; }
#lang-menu li[aria-selected="true"] { background: var(--accent); color: #fff; }
.lang-code {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.06em;
  opacity: 0.6;
}

/* ---------- Voice ---------- */

#voice {
  position: fixed;
  left: 50%;
  bottom: max(24px, env(safe-area-inset-bottom));
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
  width: min(560px, calc(100vw - 32px));
  z-index: 5;
}

#caption {
  max-width: 100%;
  max-height: 30vh;
  overflow-y: auto;
  padding: 10px 16px;
  border-radius: 16px;
  background: rgba(20, 28, 18, 0.72);
  backdrop-filter: blur(8px);
  color: #fff;
  font-size: 15px;
  line-height: 1.45;
  text-align: center;
  white-space: pre-wrap;
}
#caption[data-kind="user"] { color: #d9f2d0; font-style: italic; }
#caption[data-kind="error"] { color: #ffd2c8; }
#caption.hidden { display: none; }

#mic {
  width: 72px;
  height: 72px;
  border: 0;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: var(--accent);
  color: #fff;
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3), inset 0 0 0 3px rgba(255, 255, 255, 0.25);
  cursor: pointer;
  transition: transform 0.15s, background 0.2s;
}
#mic svg { width: 32px; height: 32px; fill: currentColor; }
#mic:hover { transform: scale(1.05); }
#mic:active { transform: scale(0.96); }
#mic:focus-visible { outline: 3px solid #fff; outline-offset: 3px; }
#mic:disabled { opacity: 0.5; cursor: not-allowed; }

#mic[data-state="listening"] { background: #d64545; animation: mic-pulse 1.2s infinite; }
#mic[data-state="thinking"] { background: #c9932e; }
#mic[data-state="speaking"] { background: #2f6fb5; }

@keyframes mic-pulse {
  0% { box-shadow: 0 0 0 0 rgba(214, 69, 69, 0.6); }
  100% { box-shadow: 0 0 0 22px rgba(214, 69, 69, 0); }
}

@media (prefers-reduced-motion: reduce) {
  #mic[data-state="listening"] { animation: none; }
}