:root {
  --bg-1: #f6f1e8;
  --bg-2: #f1dfc5;
  --paper: #fffdf7;
  --ink: #1f2630;
  --muted: #5c6674;
  --line: #d8cdbf;
  --brand: #c2472f;
  --brand-soft: #ffe4dc;
  --ok: #1f7a4f;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "Noto Sans TC", sans-serif;
  color: var(--ink);
  background:
    radial-gradient(circle at 0% 0%, rgba(194, 71, 47, 0.18), transparent 40%),
    radial-gradient(circle at 100% 20%, rgba(31, 122, 79, 0.14), transparent 45%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
  min-height: 100vh;
}

.page {
  width: min(960px, 92vw);
  margin: 36px auto;
  display: grid;
  gap: 18px;
  animation: fade-in 420ms ease-out;
}

.hero {
  padding: 20px 24px;
}

.eyebrow {
  margin: 0;
  color: var(--brand);
  letter-spacing: 0.08em;
  font-size: 0.9rem;
  font-weight: 700;
}

h1 {
  margin: 8px 0;
  font-size: clamp(1.7rem, 4vw, 2.6rem);
  line-height: 1.15;
}

.subtitle {
  margin: 0;
  color: var(--muted);
}

.panel {
  background: color-mix(in srgb, var(--paper) 92%, white 8%);
  border: 1px solid var(--line);
  border-radius: 18px;
  padding: 16px;
  box-shadow: 0 7px 25px rgba(0, 0, 0, 0.06);
}

label {
  display: block;
  font-weight: 700;
  margin-bottom: 10px;
}

.input-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 10px;
}

textarea {
  resize: vertical;
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 12px;
  font: inherit;
  color: var(--ink);
  background: #fff;
}

button {
  border: 0;
  border-radius: 12px;
  padding: 0 18px;
  font: inherit;
  font-weight: 700;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  transition: transform 120ms ease, box-shadow 120ms ease;
}

button:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 12px rgba(194, 71, 47, 0.3);
}

.result-header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 10px;
}

.result-header h2,
.panel h2 {
  margin: 0 0 10px;
  font-size: 1.2rem;
}

#resultMeta {
  color: var(--muted);
  font-size: 0.95rem;
}

.tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.token {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  border-radius: 999px;
  padding: 8px 14px;
  font-size: 1rem;
}

.token.match {
  cursor: pointer;
  border-color: color-mix(in srgb, var(--brand) 70%, #000 30%);
  background: var(--brand-soft);
}

.token.match:hover {
  filter: brightness(0.98);
}

.token.missing {
  opacity: 0.7;
}

.selected-word {
  margin-top: 0;
  color: var(--ok);
  font-weight: 700;
}

.video-list {
  display: grid;
  gap: 12px;
}

.video-card {
  border: 1px solid var(--line);
  border-radius: 14px;
  padding: 12px;
  background: #fff;
}

.video-card p {
  margin: 0 0 8px;
  color: var(--muted);
}

.video-title {
  font-weight: 700;
  color: var(--ink);
}

video {
  width: 100%;
  border-radius: 10px;
  background: #000;
}

@keyframes fade-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@media (max-width: 760px) {
  .input-row {
    grid-template-columns: 1fr;
  }

  button {
    min-height: 44px;
  }
}