/* ECOP Learn · Brand styles */
:root {
  --navy: #0a2030;
  --navy-2: #112a3f;
  --navy-3: #1b3a55;
  --gold: #f5c832;
  --gold-deep: #b88c00;
  --ink: #1a1a1a;
  --paper: #f7f5ef;
  --muted: #6b7280;
  --good: #1f9d55;
  --bad: #c0392b;
  --line: rgba(255,255,255,.10);
  --radius: 10px;
  --shadow: 0 8px 24px rgba(10,32,48,.10);
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Sarabun", "Noto Sans Thai", sans-serif;
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 16px;
}

a { color: var(--gold-deep); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* ===== Layout ===== */
.topbar {
  background: var(--navy);
  color: #fff;
  padding: 14px 22px;
  display: flex; align-items: center; justify-content: space-between;
  border-bottom: 2px solid var(--gold);
  box-shadow: var(--shadow);
}
.topbar .brand {
  font-weight: 800; letter-spacing: 1px;
  display: flex; align-items: center; gap: 12px;
}
.topbar .brand .logo {
  width: 32px; height: 32px; border-radius: 6px;
  background: var(--gold); color: var(--navy);
  display: flex; align-items: center; justify-content: center;
  font-weight: 900;
}
.topbar .user {
  font-size: 14px; opacity: .9;
  display: flex; align-items: center; gap: 14px;
}
.topbar .user button {
  background: transparent; color: #fff; border: 1px solid rgba(255,255,255,.3);
  padding: 6px 12px; border-radius: 6px; cursor: pointer; font-size: 13px;
}
.topbar .user button:hover { background: rgba(255,255,255,.1); }

.container { max-width: 1080px; margin: 0 auto; padding: 28px 22px; }
.container.narrow { max-width: 720px; }

h1, h2, h3 { color: var(--navy); margin-top: 0; }
h1 { font-size: 28px; letter-spacing: -.3px; }
h2 { font-size: 22px; }
h3 { font-size: 17px; }

.muted { color: var(--muted); }
.tag {
  display: inline-block; padding: 3px 10px; border-radius: 999px;
  background: rgba(245,200,50,.15); color: var(--gold-deep);
  font-size: 12px; font-weight: 600; letter-spacing: .3px;
}
.tag.dark { background: var(--navy); color: var(--gold); }
.tag.good { background: rgba(31,157,85,.15); color: var(--good); }
.tag.bad { background: rgba(192,57,43,.12); color: var(--bad); }

/* ===== Cards ===== */
.card {
  background: #fff; border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
  border: 1px solid #ebe7dc;
}
.card + .card { margin-top: 16px; }
.card-dark {
  background: var(--navy); color: #fff; border: none;
}
.card-dark h1, .card-dark h2 { color: var(--gold); }

/* ===== Forms ===== */
label { display: block; font-size: 14px; font-weight: 600; margin: 14px 0 6px; color: var(--navy); }
input, select, textarea {
  width: 100%; padding: 11px 13px;
  border: 1px solid #d8d4c8; border-radius: 8px;
  font-size: 15px; font-family: inherit; background: #fff;
}
input:focus, select:focus, textarea:focus {
  outline: 2px solid var(--gold); outline-offset: 1px; border-color: var(--gold);
}

.btn {
  display: inline-block; padding: 11px 20px;
  background: var(--navy); color: #fff;
  border: none; border-radius: 8px; cursor: pointer;
  font-size: 15px; font-weight: 600; letter-spacing: .3px;
  transition: transform .1s, opacity .2s;
}
.btn:hover { opacity: .9; }
.btn:active { transform: translateY(1px); }
.btn.primary { background: var(--gold); color: var(--navy); }
.btn.ghost { background: transparent; color: var(--navy); border: 1px solid var(--navy); }
.btn.danger { background: var(--bad); }
.btn:disabled { opacity: .5; cursor: not-allowed; }
.btn.lg { padding: 14px 26px; font-size: 16px; }

.btn-row { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 18px; }

/* ===== Library (book grid) ===== */
.library {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 18px;
  margin-top: 20px;
}
.book-card {
  background: #fff; border-radius: var(--radius);
  border: 1px solid #ebe7dc;
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: transform .15s, box-shadow .15s;
  cursor: pointer;
}
.book-card:hover { transform: translateY(-3px); box-shadow: 0 12px 28px rgba(10,32,48,.15); }
.book-card .cover {
  background: linear-gradient(135deg, var(--navy) 0%, var(--navy-3) 100%);
  color: var(--gold);
  padding: 22px 18px;
  height: 140px;
  display: flex; flex-direction: column; justify-content: space-between;
  border-bottom: 3px solid var(--gold);
}
.book-card .cover .code {
  font-size: 11px; letter-spacing: 2px; font-weight: 700; opacity: .9;
}
.book-card .cover .title {
  font-size: 19px; font-weight: 800; line-height: 1.25;
}
.book-card .body { padding: 14px 18px; flex: 1; }
.book-card .body .sub { color: var(--muted); font-size: 13px; min-height: 32px; }
.book-card .footer {
  padding: 12px 18px; border-top: 1px solid #ebe7dc;
  display: flex; justify-content: space-between; align-items: center;
  background: #fafaf6;
}

/* Progress bar */
.bar { background: #ebe7dc; border-radius: 999px; overflow: hidden; height: 6px; width: 100%; }
.bar .fill { background: var(--gold); height: 100%; transition: width .3s; }

.stage-pills { display: flex; gap: 4px; align-items: center; font-size: 11px; }
.pill { display: inline-flex; align-items: center; gap: 4px; padding: 2px 8px; border-radius: 999px; background: #e8e3d4; color: var(--muted); font-weight: 600; }
.pill.active { background: var(--gold); color: var(--navy); }
.pill.done { background: var(--good); color: #fff; }

/* ===== Stages page (book overview) ===== */
.stage-track {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 10px; margin: 18px 0 24px;
}
.stage-step {
  background: #fff; border-radius: 10px;
  border: 2px solid #ebe7dc; padding: 14px;
  text-align: center;
}
.stage-step.active { border-color: var(--gold); background: #fffbe8; }
.stage-step.done { border-color: var(--good); background: #f0fbf5; }
.stage-step .n {
  width: 28px; height: 28px; border-radius: 50%;
  background: var(--navy); color: var(--gold);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 800; margin-bottom: 6px;
}
.stage-step.done .n { background: var(--good); color: #fff; }
.stage-step .lbl { font-weight: 700; font-size: 14px; color: var(--navy); }
.stage-step .desc { font-size: 12px; color: var(--muted); margin-top: 4px; }

/* ===== Reader (book iframe) ===== */
.reader-wrap {
  background: #2a2a2a; padding: 8px; border-radius: 10px;
  height: calc(100vh - 220px); min-height: 480px;
}
.reader-wrap iframe { width: 100%; height: 100%; border: none; border-radius: 6px; background: #fff; }

/* ===== Lesson / quiz ===== */
.q-card {
  background: #fff; border-radius: 10px; padding: 22px;
  border: 1px solid #ebe7dc; box-shadow: var(--shadow);
  margin-bottom: 18px;
}
.q-card .q-num { font-size: 12px; font-weight: 700; color: var(--gold-deep); letter-spacing: 1px; }
.q-card .q-text { font-size: 17px; font-weight: 600; margin: 6px 0 16px; color: var(--navy); }

.opt {
  display: flex; gap: 12px; padding: 14px;
  border: 2px solid #ebe7dc; border-radius: 8px;
  margin: 10px 0; cursor: pointer;
  transition: border-color .15s, background .15s;
}
.opt:hover { border-color: var(--gold); background: #fffbe8; }
.opt.selected { border-color: var(--navy); background: #f0f4f8; }
.opt.correct { border-color: var(--good); background: #f0fbf5; }
.opt.wrong { border-color: var(--bad); background: #fdf0ee; }
.opt input { display: none; }
.opt .letter {
  width: 28px; height: 28px; border-radius: 50%;
  background: #ebe7dc; color: var(--navy);
  display: inline-flex; align-items: center; justify-content: center;
  font-weight: 700; flex-shrink: 0;
}
.opt.correct .letter { background: var(--good); color: #fff; }
.opt.wrong .letter { background: var(--bad); color: #fff; }
.opt.selected .letter { background: var(--navy); color: var(--gold); }

.feedback {
  margin-top: 14px; padding: 12px 14px; border-radius: 6px;
  background: #fffbe8; border-left: 4px solid var(--gold);
  font-size: 14px;
}
.feedback.good { background: #f0fbf5; border-left-color: var(--good); }
.feedback.bad { background: #fdf0ee; border-left-color: var(--bad); }

.lesson-section {
  background: #fff; border-radius: 10px;
  padding: 22px; border: 1px solid #ebe7dc;
  box-shadow: var(--shadow); margin-bottom: 18px;
}
.lesson-section h2 { color: var(--navy); border-bottom: 2px solid var(--gold); padding-bottom: 6px; }

/* ===== Admin table ===== */
.tbl { width: 100%; border-collapse: collapse; background: #fff; border-radius: 10px; overflow: hidden; box-shadow: var(--shadow); }
.tbl th, .tbl td { padding: 12px 14px; text-align: left; border-bottom: 1px solid #ebe7dc; }
.tbl th { background: var(--navy); color: #fff; font-size: 13px; letter-spacing: .5px; }
.tbl tr:hover { background: #fafaf6; }
.tbl tr:last-child td { border-bottom: none; }
.tbl .num { text-align: right; font-variant-numeric: tabular-nums; }

.summary-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 12px; margin-bottom: 22px;
}
.metric {
  background: #fff; border-radius: 10px; padding: 16px;
  border: 1px solid #ebe7dc;
}
.metric .v { font-size: 28px; font-weight: 800; color: var(--navy); }
.metric .l { font-size: 12px; color: var(--muted); letter-spacing: .8px; text-transform: uppercase; }

/* ===== Toast / banner ===== */
.banner {
  padding: 12px 16px; border-radius: 8px; margin-bottom: 16px;
  background: #fffbe8; border-left: 4px solid var(--gold);
  font-size: 14px;
}
.banner.error { background: #fdf0ee; border-left-color: var(--bad); color: var(--bad); }
.banner.ok { background: #f0fbf5; border-left-color: var(--good); color: var(--good); }

/* ===== Cert preview ===== */
.cert-preview {
  background: linear-gradient(135deg, #fff 0%, #fef6dc 100%);
  border: 8px double var(--gold-deep);
  padding: 50px 40px; border-radius: 12px;
  text-align: center; box-shadow: var(--shadow);
  font-family: "Georgia", serif;
}
.cert-preview .seal { font-size: 60px; color: var(--gold-deep); }
.cert-preview .ttl { font-size: 32px; font-weight: 900; color: var(--navy); letter-spacing: 2px; margin: 10px 0; }
.cert-preview .sub { color: var(--muted); font-size: 14px; margin-bottom: 24px; }
.cert-preview .name { font-size: 36px; font-family: "Georgia", serif; color: var(--navy); margin: 14px 0; border-bottom: 1px solid var(--gold-deep); padding-bottom: 6px; display: inline-block; }
.cert-preview .book { font-size: 20px; color: var(--navy); margin: 14px 0; }
.cert-preview .meta { color: var(--muted); font-size: 13px; margin-top: 24px; }

@media (max-width: 640px) {
  .container { padding: 18px 14px; }
  .library { grid-template-columns: 1fr; }
  .stage-track { grid-template-columns: 1fr 1fr; }
  h1 { font-size: 22px; }
}