:root {
  --bg0: #1a2420;
  --bg1: #24322c;
  --ink: #f2efe6;
  --muted: #a8b5ad;
  --accent: #e2b15a;
  --accent-ink: #1a2420;
  --line: rgba(242, 239, 230, 0.14);
  --danger: #e07a6a;
  --ok: #7ec8a3;
  --font-display: "Fraunces", "Iowan Old Style", "Palatino Linotype", Palatino, serif;
  --font-body: "Source Sans 3", "Segoe UI", sans-serif;
  --font-hanzi: "Noto Serif TC", "Songti TC", "PingFang HK", serif;
}

@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,600;9..144,700&family=Source+Sans+3:wght@400;600&family=Noto+Serif+TC:wght@600&display=swap");

* { box-sizing: border-box; }
html, body { margin: 0; min-height: 100%; }
body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(1200px 700px at 10% -10%, #355246 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 0%, #4a3b22 0%, transparent 45%),
    linear-gradient(160deg, var(--bg0), var(--bg1));
  background-attachment: fixed;
}

.top {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
}
.brand {
  font-family: var(--font-display);
  font-size: 1.6rem;
  margin: 0;
  letter-spacing: 0.02em;
}
.top-meta { color: var(--muted); display: flex; gap: 1rem; align-items: center; }
.top-meta a { color: var(--accent); }

main { max-width: 40rem; margin: 0 auto; padding: 1.5rem 1.25rem 3rem; }
.panel h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(1.8rem, 4vw, 2.4rem);
  margin: 0 0 0.4rem;
}
.lede { color: var(--muted); margin: 0 0 1.5rem; line-height: 1.45; }

.mode-grid {
  display: grid;
  gap: 0.75rem;
}
.mode-grid button {
  text-align: left;
  padding: 1rem 1.1rem;
  border: 1px solid var(--line);
  border-radius: 0.75rem;
  background: rgba(255,255,255,0.04);
  color: var(--ink);
  cursor: pointer;
  font: inherit;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}
.mode-grid button:hover {
  border-color: var(--accent);
  background: rgba(226, 177, 90, 0.08);
  transform: translateY(-1px);
}
.mode-grid strong { display: block; font-family: var(--font-display); font-size: 1.2rem; }
.mode-grid span { color: var(--muted); font-size: 0.95rem; }

.resume {
  margin-top: 1.25rem;
  padding: 1rem;
  border: 1px dashed var(--accent);
  border-radius: 0.75rem;
}
.resume.hidden, .hidden { display: none !important; }
.resume p { margin: 0 0 0.75rem; }
.resume .row { display: flex; gap: 0.5rem; flex-wrap: wrap; }

.stats {
  margin-top: 2rem;
  padding-top: 1rem;
  border-top: 1px solid var(--line);
}
.stats h2 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  margin: 0 0 0.75rem;
}
.stat-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(9rem, 1fr));
  gap: 0.75rem;
}
.stat {
  padding: 0.75rem;
  border-radius: 0.6rem;
  background: rgba(0,0,0,0.18);
}
.stat .label { color: var(--muted); font-size: 0.8rem; text-transform: uppercase; letter-spacing: 0.04em; }
.stat .value { font-size: 1.35rem; font-weight: 600; margin-top: 0.2rem; }

.play-bar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 0.5rem;
  color: var(--muted);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}
.hanzi {
  font-family: var(--font-hanzi);
  font-size: clamp(3.5rem, 14vw, 5.5rem);
  line-height: 1.15;
  text-align: center;
  margin: 0.5rem 0 0.75rem;
  animation: rise 0.35s ease;
}
@keyframes rise {
  from { opacity: 0; transform: translateY(8px); }
  to { opacity: 1; transform: none; }
}
.english-line, .hint-line, .feedback, .tries {
  text-align: center;
  min-height: 1.25rem;
  margin: 0.35rem 0;
}
.english-line { color: var(--accent); }
.hint-line {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.4;
  max-width: 36rem;
  margin-left: auto;
  margin-right: auto;
}
.feedback.ok { color: var(--ok); }
.feedback.bad { color: var(--danger); }

.guess-form {
  display: flex;
  gap: 0.5rem;
  margin: 1.25rem 0 0.75rem;
}
.guess-form input {
  flex: 1;
  font: inherit;
  font-size: 1.1rem;
  padding: 0.85rem 1rem;
  border-radius: 0.65rem;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.25);
  color: var(--ink);
}
.guess-form input:focus {
  outline: 2px solid rgba(226, 177, 90, 0.45);
  border-color: var(--accent);
}
button, .guess-form button {
  font: inherit;
  font-weight: 600;
  border: 0;
  border-radius: 0.65rem;
  padding: 0.85rem 1.1rem;
  background: var(--accent);
  color: var(--accent-ink);
  cursor: pointer;
}
button.ghost {
  background: transparent;
  color: var(--muted);
  border: 1px solid var(--line);
  padding: 0.45rem 0.75rem;
}
.actions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.5rem;
}
.actions button {
  background: rgba(255,255,255,0.06);
  color: var(--ink);
  border: 1px solid var(--line);
  padding: 0.7rem 0.4rem;
  font-size: 0.9rem;
}
.actions button:disabled {
  opacity: 0.45;
  cursor: default;
}

.login-page {
  display: grid;
  place-items: center;
  min-height: 100vh;
  padding: 1.5rem;
}
.login-shell {
  width: min(24rem, 100%);
  animation: rise 0.4s ease;
}
.login-shell .brand { font-size: 2.4rem; margin-bottom: 0.25rem; }
.login-form { display: grid; gap: 0.85rem; }
.login-form label { display: grid; gap: 0.35rem; color: var(--muted); font-size: 0.9rem; }
.login-form input {
  font: inherit;
  padding: 0.8rem 0.9rem;
  border-radius: 0.6rem;
  border: 1px solid var(--line);
  background: rgba(0,0,0,0.25);
  color: var(--ink);
}
.error { color: var(--danger); }

@media (max-width: 520px) {
  .actions { grid-template-columns: repeat(2, 1fr); }
}