/* ═══════════════════════════════════════════════════════════
   PEIF Platform — stylesheet
   ═══════════════════════════════════════════════════════════ */
:root {
  --ink: #16302a;
  --green-900: #0a3d2e;
  --green-700: #0b5c43;
  --green-600: #0f6b4f;
  --green-500: #12805e;
  --green-100: #e3efe9;
  --green-50: #eef5f1;
  --gold: #c9a227;
  --gold-soft: #f4d06f;
  --bg: #f5f7f4;
  --card: #ffffff;
  --muted: #5f6f68;
  --line: #dde5df;
  --danger: #b23b3b;
  --radius: 14px;
  --shadow: 0 1px 3px rgba(22, 48, 42, .08), 0 6px 24px rgba(22, 48, 42, .06);
}
* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
[hidden] { display: none !important; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, "PingFang SC", "Microsoft YaHei", sans-serif;
  background: var(--bg);
  color: var(--ink);
  line-height: 1.6;
  font-size: 15.5px;
}
h1, h2, h3, h4 { line-height: 1.3; margin: 0 0 .5em; color: var(--ink); }
h2 { font-size: 1.5rem; }
h3 { font-size: 1.15rem; }
p { margin: 0 0 .8em; }
a { color: var(--green-600); text-decoration: none; }
.small { font-size: .85rem; }
.muted { color: var(--muted); }
.error-text { color: var(--danger); font-size: .9rem; white-space: pre-wrap; }
.linklike {
  background: none; border: none; padding: 0; margin: 0;
  color: var(--green-600); cursor: pointer; font-size: inherit; text-decoration: underline;
}

/* ── top bar ─────────────────────────────────────────── */
.topbar {
  position: sticky; top: 0; z-index: 50;
  background: rgba(245, 247, 244, .92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--line);
}
.topbar-inner {
  max-width: 1180px; margin: 0 auto; padding: 10px 20px;
  display: flex; align-items: center; gap: 18px; flex-wrap: wrap;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand-mark {
  width: 38px; height: 38px; border-radius: 10px;
  background: linear-gradient(135deg, var(--green-600), var(--green-900));
  color: var(--gold-soft); font-family: Georgia, serif; font-size: 1.3rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.brand-text { font-weight: 700; color: var(--ink); display: flex; flex-direction: column; line-height: 1.15; }
.brand-sub { font-weight: 400; font-size: .7rem; color: var(--muted); letter-spacing: .02em; }
.nav { display: flex; gap: 4px; margin-left: 8px; flex-wrap: wrap; }
.nav a {
  padding: 6px 12px; border-radius: 999px; color: var(--ink); font-size: .92rem; font-weight: 500;
}
.nav a:hover { background: var(--green-100); }
.nav a.active { background: var(--green-600); color: #fff; }
.topbar-user { margin-left: auto; }
.chip {
  background: var(--card); border: 1px solid var(--line); border-radius: 999px;
  padding: 6px 14px; font-size: .9rem; cursor: pointer; color: var(--ink);
}
.chip:hover { border-color: var(--green-500); }

/* ── layout ──────────────────────────────────────────── */
.wrap { max-width: 1180px; margin: 0 auto; padding: 28px 20px 60px; }
.view-head { max-width: 860px; margin-bottom: 22px; }
.view-head p { color: var(--muted); }
.card {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow); margin-bottom: 22px;
}
.cards-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px; }
@media (max-width: 900px) { .cards-2, .planner-grid, .feedback-grid { grid-template-columns: 1fr; } }

/* ── buttons ─────────────────────────────────────────── */
.btn {
  display: inline-block; border: 1px solid transparent; border-radius: 10px;
  padding: 10px 18px; font-size: .95rem; font-weight: 600; cursor: pointer;
  transition: background .15s ease, border-color .15s ease; font-family: inherit;
}
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--green-600); color: #fff; }
.btn-primary:hover:not(:disabled) { background: var(--green-500); }
.btn-gold { background: var(--gold); color: #241d05; }
.btn-gold:hover:not(:disabled) { background: #dbb23a; }
.btn-quiet { background: var(--green-50); color: var(--green-700); border-color: var(--line); }
.btn-quiet:hover:not(:disabled) { border-color: var(--green-500); background: var(--green-100); }
.btn-row { display: flex; gap: 10px; align-items: center; flex-wrap: wrap; margin-top: 12px; }

/* ── forms ───────────────────────────────────────────── */
.field-label { display: block; font-weight: 600; font-size: .88rem; margin: 12px 0 6px; }
input[type="text"], textarea {
  width: 100%; border: 1px solid var(--line); border-radius: 10px;
  padding: 10px 12px; font-size: .95rem; font-family: inherit; color: var(--ink);
  background: #fbfdfb; resize: vertical;
}
input[type="text"]:focus, textarea:focus {
  outline: none; border-color: var(--green-500); box-shadow: 0 0 0 3px rgba(18, 128, 94, .12);
}

/* ── planner / reviews ───────────────────────────────── */
.planner-grid { display: grid; grid-template-columns: 1fr 1.1fr; gap: 18px; align-items: start; }
.review-head-row { display: flex; align-items: center; justify-content: space-between; gap: 10px; flex-wrap: wrap; }
.score-badge {
  background: var(--green-700); color: #fff; border-radius: 999px;
  padding: 7px 16px; font-weight: 700; font-size: 1rem;
}
.chart-box { display: flex; justify-content: center; margin: 6px 0 10px; }
.overall-text { background: var(--green-50); border-left: 4px solid var(--green-600); padding: 12px 14px; border-radius: 0 10px 10px 0; white-space: pre-wrap; }
.criteria-item { border: 1px solid var(--line); border-radius: 10px; margin-bottom: 10px; overflow: hidden; }
.criteria-head {
  display: flex; align-items: center; gap: 10px; padding: 10px 14px; cursor: pointer;
  background: #fbfdfb; font-weight: 600;
}
.criteria-head:hover { background: var(--green-50); }
.criteria-score {
  margin-left: auto; min-width: 34px; text-align: center; border-radius: 999px;
  padding: 2px 9px; font-weight: 700; font-size: .88rem;
}
.cs-5 { background: #d9f0e4; color: #0b5c43; }
.cs-4 { background: #e7f2ec; color: #2e6e54; }
.cs-3 { background: #fbf3d9; color: #8a6d1a; }
.cs-2 { background: #f9e3d5; color: #9a5a1f; }
.cs-1 { background: #f7dcdc; color: #a03434; }
.criteria-body { padding: 4px 16px 14px; border-top: 1px dashed var(--line); }
.criteria-body p { margin: .5em 0 0; font-size: .93rem; }
.criteria-body .suggestion { color: var(--green-700); }

.placeholder {
  text-align: center; color: var(--muted); padding: 34px 20px;
  border: 2px dashed var(--line); border-radius: 12px;
}
.placeholder-icon { font-size: 2rem; margin-bottom: 8px; }
.spinner {
  width: 30px; height: 30px; margin: 0 auto 12px; border-radius: 50%;
  border: 3px solid var(--green-100); border-top-color: var(--green-600);
  animation: spin 1s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ── chat ────────────────────────────────────────────── */
.chat-card { margin-top: 4px; }
.chat {
  display: flex; flex-direction: column; gap: 12px;
  max-height: 440px; overflow-y: auto; padding: 6px 2px; margin-bottom: 12px;
}
.msg { display: flex; gap: 10px; max-width: 86%; }
.msg .avatar {
  flex: 0 0 34px; width: 34px; height: 34px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center; font-size: 1.05rem;
}
.msg .bubble {
  border-radius: 4px 14px 14px 14px; padding: 10px 14px; font-size: .95rem;
  white-space: pre-wrap; word-break: break-word;
}
.msg.bot .avatar { background: var(--green-100); }
.msg.bot .bubble { background: #fff; border: 1px solid var(--line); }
.msg.me { margin-left: auto; flex-direction: row-reverse; }
.msg.me .avatar { background: var(--gold-soft); }
.msg.me .bubble { background: var(--green-600); color: #fff; border-radius: 14px 4px 14px 14px; }
.msg .typing { color: var(--muted); font-style: italic; }
.chat-input-row { display: flex; gap: 10px; align-items: flex-end; }
.chat-input-row textarea { flex: 1; }
.chat-extra-row { display: flex; gap: 12px; align-items: center; margin-top: 10px; flex-wrap: wrap; }

/* ── rehearsal ──────────────────────────────────────── */
.rehearsal-head { display: flex; justify-content: space-between; align-items: flex-start; gap: 12px; flex-wrap: wrap; margin-bottom: 12px; }
.rehearsal-chat { max-height: 460px; min-height: 260px; }
.scenario-card { cursor: pointer; transition: transform .15s ease, border-color .15s ease; }
.scenario-card:hover { transform: translateY(-3px); border-color: var(--green-500); }
.student-chip {
  display: inline-block; background: var(--green-100); color: var(--green-700);
  border-radius: 999px; padding: 3px 12px; font-size: .82rem; font-weight: 600;
}
.feedback-grid { display: grid; grid-template-columns: 340px 1fr; gap: 16px; align-items: start; }
.turn-item { border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; margin-bottom: 8px; }
.turn-item .turn-note { color: var(--muted); font-size: .88rem; margin-top: 2px; }
.move-badge {
  display: inline-block; border-radius: 999px; padding: 1px 10px; font-size: .78rem; font-weight: 600; margin-right: 6px;
}
.mb-eliciting    { background: #d9f0e4; color: #0b5c43; }
.mb-interpreting { background: #fbf3d9; color: #8a6d1a; }
.mb-responding   { background: #e0e9f5; color: #28527a; }

/* ── progress ───────────────────────────────────────── */
.stats-row { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 20px; }
@media (max-width: 700px) { .stats-row { grid-template-columns: repeat(2, 1fr); } }
.stat {
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  padding: 16px; text-align: center; box-shadow: var(--shadow);
}
.stat-num { display: block; font-size: 1.7rem; font-weight: 700; color: var(--green-700); }
.stat-label { color: var(--muted); font-size: .82rem; }
.mini-scores { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 6px; }
.mini-score {
  border-radius: 6px; padding: 2px 8px; font-size: .78rem; font-weight: 600;
  background: var(--green-50); color: var(--green-700); border: 1px solid var(--line);
}
.board-item { border-bottom: 1px dashed var(--line); padding: 12px 0; }
.board-item:last-child { border-bottom: none; }
.board-item .board-meta { color: var(--muted); font-size: .82rem; }
.board-empty { color: var(--muted); text-align: center; padding: 22px 0; }
.prompt-item { border: 1px solid var(--line); border-radius: 10px; padding: 12px 14px; margin-bottom: 10px; background: #fbfdfb; }
.prompt-item .why { color: var(--muted); font-size: .86rem; margin-top: 4px; }

/* ── footer & modal ─────────────────────────────────── */
.footer { border-top: 1px solid var(--line); background: #eef2ee; margin-top: 40px; }
.footer-inner { padding-top: 26px; padding-bottom: 30px; }
.footer p { margin: 0 0 4px; }
.modal-backdrop {
  position: fixed; inset: 0; background: rgba(10, 61, 46, .55); z-index: 100;
  display: flex; align-items: center; justify-content: center; padding: 20px;
}
.modal {
  background: #fff; border-radius: var(--radius); padding: 26px; max-width: 420px; width: 100%;
  box-shadow: 0 20px 60px rgba(0, 0, 0, .3);
}
.modal input { margin-bottom: 14px; }

/* ── two simulated students ──────────────────────────── */
.msg.bot-a .avatar { background: #d9f0e4; color: #0b5c43; font-weight: 700; }
.msg.bot-b .avatar { background: #e0e9f5; color: #28527a; font-weight: 700; }
.msg.bot-a .bubble, .msg.bot-b .bubble { background: #fff; border: 1px solid var(--line); }
.muted-chip { background: #eef2ee; color: var(--muted); }