/* Bảng màu và bộ chữ lấy đúng theo trang bán hàng daothinhvuong.vn để học viên
   thấy liền mạch với nơi họ đã đăng ký. Mobile trước: đa số vào từ link Zalo. */
:root {
  --bg: #161616;
  --card: #1E1E1E;
  --card-2: #262626;
  --line: #2A2A2A;
  --text: #feedba;
  --muted: #C4C4C4;
  --dim: #8a8a8a;
  --accent: #FFCC16;
  --accent-2: #F49425;
  --warn: #E8896B;
  --ok: #7FBF7F;
  --radius: 14px;
  --tap: 48px;
}

* { box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  font-size: 16px; line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

h1, h2, h3, .font-display { font-family: 'Sora', 'Inter', sans-serif; font-weight: 700; line-height: 1.25; }

.wrap { max-width: 560px; margin: 0 auto; padding: 20px 18px 64px; }

.eyebrow {
  font-size: 12px; letter-spacing: .16em; text-transform: uppercase;
  color: var(--accent-2); margin: 0 0 6px;
}
.muted { color: var(--muted); }
.dim { color: var(--dim); font-size: 13px; }
.center { text-align: center; }

.card {
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin: 0 0 14px;
}
.card.flat { background: transparent; border-color: var(--line); }

/* ── Nút ─────────────────────────────────────────────────────────────── */
.btn {
  display: flex; align-items: center; justify-content: center; gap: 8px;
  width: 100%; min-height: var(--tap); padding: 12px 18px;
  border-radius: 12px; border: 1px solid var(--line);
  background: var(--card-2); color: var(--text);
  font-family: 'Sora', sans-serif; font-size: 15px; font-weight: 600;
  text-decoration: none; cursor: pointer; transition: opacity .15s;
}
.btn:active { opacity: .75; }
.btn[disabled], .btn.is-locked { opacity: .4; cursor: not-allowed; }
/* Chữ trên nền vàng phải là màu tối, không dùng chữ kem: nền vàng rất sáng. */
.btn-primary { background: var(--accent); border-color: var(--accent); color: #161616; }
.btn-ghost { background: transparent; }
.btn-row { display: flex; gap: 10px; }
.btn-row .btn { flex: 1; }

/* ── Nhãn trạng thái ─────────────────────────────────────────────────── */
.tag {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  font-size: 11px; font-weight: 600; letter-spacing: .1em; text-transform: uppercase;
  border: 1px solid var(--line); color: var(--muted);
}
.tag-live { background: rgba(255,204,22,.14); border-color: var(--accent); color: var(--accent); }
.tag-done { background: rgba(127,191,127,.12); border-color: rgba(127,191,127,.4); color: var(--ok); }
.tag-soon { border-color: var(--accent-2); color: var(--accent-2); }

/* ── Thẻ buổi học ────────────────────────────────────────────────────── */
.lesson-card {
  display: block; text-decoration: none; color: inherit;
  background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 18px; margin: 0 0 12px;
}
.lesson-card.locked { opacity: .5; }
.lesson-card .no { font-size: 12px; letter-spacing: .16em; color: var(--accent-2); }
.lesson-card h3 { margin: 6px 0 10px; font-size: 18px; }
.lesson-card .meta { display: flex; align-items: center; justify-content: space-between; gap: 10px; }

/* ── Thanh tiến độ ───────────────────────────────────────────────────── */
.bar { height: 8px; border-radius: 999px; background: var(--card-2); overflow: hidden; }
.bar > i { display: block; height: 100%; background: var(--accent); border-radius: 999px; transition: width .3s; }

/* ── Biểu mẫu ────────────────────────────────────────────────────────── */
label.q { display: block; margin: 0 0 10px; font-size: 15px; font-weight: 600; }
.hint { font-size: 13px; color: var(--dim); margin: -4px 0 10px; }

input[type=text], input[type=tel], textarea, select {
  width: 100%; min-height: var(--tap); padding: 12px 14px;
  background: var(--card-2); border: 1px solid var(--line); border-radius: 10px;
  color: var(--text); font-family: inherit; font-size: 16px; /* 16px để iOS không tự phóng to */
}
textarea { min-height: 108px; resize: vertical; line-height: 1.6; }
input:focus, textarea:focus, select:focus { outline: 2px solid var(--accent-2); outline-offset: 1px; }

.opts { display: flex; flex-direction: column; gap: 8px; margin: 0 0 6px; }
.opt {
  display: flex; align-items: center; gap: 12px; min-height: var(--tap);
  padding: 10px 14px; border: 1px solid var(--line); border-radius: 10px;
  background: var(--card-2); cursor: pointer; font-size: 15px;
}
.opt input { width: 20px; height: 20px; flex: 0 0 auto; accent-color: var(--accent); }
.opt.sel { border-color: var(--accent); background: rgba(255,204,22,.1); }
.opt.dis { opacity: .4; }

.fill { display: flex; flex-direction: column; gap: 6px; margin: 0 0 14px; }
.fill span { font-size: 15px; }
.rank-row { display: flex; align-items: center; gap: 10px; margin: 0 0 8px; }
.rank-row b { flex: 0 0 32px; color: var(--accent-2); font-family: 'Sora', sans-serif; }

.note {
  border-left: 3px solid var(--accent-2); padding: 10px 14px; margin: 12px 0 0;
  background: var(--card-2); border-radius: 0 10px 10px 0;
  font-size: 14px; color: var(--muted); line-height: 1.55;
}
.privacy { font-size: 13px; color: var(--dim); line-height: 1.55; }

.msg { padding: 12px 14px; border-radius: 10px; font-size: 14px; margin: 0 0 12px; }
.msg-err { background: rgba(232,137,107,.12); border: 1px solid rgba(232,137,107,.4); color: var(--warn); }
.msg-ok { background: rgba(127,191,127,.1); border: 1px solid rgba(127,191,127,.35); color: var(--ok); }

.divider { height: 1px; background: var(--line); margin: 24px 0; border: 0; }

.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin: 0 0 20px; }
.back { color: var(--muted); text-decoration: none; font-size: 14px; }

.summary-item { padding: 14px 0; border-bottom: 1px solid var(--line); }
.summary-item:last-child { border-bottom: 0; }
.summary-item .k { font-size: 12px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2); margin: 0 0 6px; }
.summary-item .v { white-space: pre-wrap; }
.summary-item .v.empty { color: var(--dim); font-style: italic; }

.hidden { display: none !important; }
.sticky-foot {
  position: sticky; bottom: 0; padding: 14px 0 0;
  background: linear-gradient(180deg, rgba(22,22,22,0) 0%, var(--bg) 34%);
}

/* ── Bản in PDF ──────────────────────────────────────────────────────── */
@page { size: A4; margin: 16mm 14mm; }
@media print {
  body { background: #fff; color: #1a1a1a; }
  .no-print { display: none !important; }
  .wrap { max-width: none; padding: 0; }
  .card, .summary-item { background: #fff; border-color: #d8d8d8; }
  .summary-item .k { color: #8a5a12; }
  .eyebrow { color: #8a5a12; }
  a { color: #1a1a1a; text-decoration: none; }
}

/* ── Ba bước đăng nhập và khối trợ giúp ──────────────────────────────── */
.steps {
  margin: 0 0 18px; padding: 14px 16px 14px 34px;
  background: var(--card-2); border: 1px solid var(--line); border-radius: 12px;
  font-size: 14px; line-height: 1.6; color: var(--muted);
}
.steps li { margin: 0 0 6px; }
.steps li:last-child { margin: 0; }
.steps b { color: var(--text); }

.help { margin: 14px 0 0; }
.help summary {
  cursor: pointer; font-size: 14px; color: var(--accent-2);
  padding: 10px 0; list-style: none; min-height: 40px; display: flex; align-items: center;
}
.help summary::-webkit-details-marker { display: none; }
.help summary::before { content: '?'; display: inline-flex; align-items: center; justify-content: center;
  width: 20px; height: 20px; margin-right: 10px; border-radius: 50%;
  border: 1px solid var(--accent-2); font-size: 12px; flex: 0 0 auto; }
.help p { margin: 0 0 10px; font-size: 14px; line-height: 1.6; color: var(--muted); }
.help code { background: var(--card-2); padding: 2px 6px; border-radius: 4px; font-size: 13px; }

/* ── Khung thương hiệu ───────────────────────────────────────────────────── */
.site-head {
  display: flex; align-items: center; justify-content: space-between; gap: 14px;
  padding: 4px 0 20px; margin: 0 0 4px;
}
.site-logo { height: 26px; width: auto; max-width: 160px; object-fit: contain; opacity: .92; }
.site-head .back { display: inline-flex; align-items: center; gap: 6px; }
.site-head .back .ic { transform: rotate(180deg); width: 16px; height: 16px; }

.ic { width: 20px; height: 20px; flex: 0 0 auto; vertical-align: middle; }
.btn .ic { width: 18px; height: 18px; }

.site-foot { margin: 40px 0 0; padding: 22px 0 0; border-top: 1px solid var(--line); }
.foot-help, .foot-help-plain {
  display: flex; align-items: center; gap: 12px; margin: 0 0 16px;
  padding: 14px 16px; background: var(--card); border: 1px solid var(--line);
  border-radius: 12px; text-decoration: none; color: var(--text); font-size: 14px; line-height: 1.5;
}
.foot-help .ic, .foot-help-plain .ic { color: var(--accent-2); width: 22px; height: 22px; }
.foot-note, .foot-copy { font-size: 12px; line-height: 1.6; color: var(--dim); margin: 0 0 8px; }
.foot-copy b { color: var(--muted); }

/* ── Thẻ khóa học ────────────────────────────────────────────────────────── */
.course-card {
  display: block; text-decoration: none; color: inherit; position: relative;
  background: linear-gradient(160deg, var(--card) 0%, var(--card-2) 100%);
  border: 1px solid var(--line); border-radius: 16px; padding: 20px; margin: 0 0 14px;
}
.course-card.locked { opacity: .45; }
.course-card .badge {
  display: inline-flex; align-items: center; gap: 6px; margin: 0 0 12px;
  font-size: 11px; letter-spacing: .12em; text-transform: uppercase; color: var(--accent-2);
}
.course-card .badge .ic { width: 15px; height: 15px; }
.course-card h2 { margin: 0 0 4px; font-size: 20px; }
.course-card .sub { margin: 0 0 14px; font-size: 14px; color: var(--muted); line-height: 1.5; }
.course-card .facts { display: flex; flex-wrap: wrap; gap: 6px 18px; margin: 0 0 14px; }
.course-card .fact { display: flex; align-items: center; gap: 7px; font-size: 13px; color: var(--muted); }
.course-card .fact .ic { width: 16px; height: 16px; color: var(--accent-2); }
.course-card .go { display: flex; align-items: center; justify-content: space-between; gap: 10px;
  margin: 14px 0 0; padding: 12px 0 0; border-top: 1px solid var(--line);
  font-family: 'Sora', sans-serif; font-size: 14px; font-weight: 600; color: var(--accent); }
.course-card .go .ic { width: 18px; height: 18px; }

.soon-note {
  display: flex; align-items: center; gap: 12px; padding: 16px;
  border: 1px dashed var(--line); border-radius: 14px; color: var(--dim);
  font-size: 13px; line-height: 1.55; margin: 0 0 14px;
}
.soon-note .ic { color: var(--dim); }

/* Nhãn nhỏ trong thẻ tài nguyên */
.res-head { display: flex; align-items: center; gap: 9px; margin: 0 0 2px; }
.res-head .ic { color: var(--accent-2); width: 18px; height: 18px; }
.res-head p { margin: 0; }

@media print { .site-head, .site-foot { display: none !important; } }

/* ── Ghi chú nhỏ dưới nút ────────────────────────────────────────────────── */
.note-under { margin: 9px 0 0; font-size: 13px; line-height: 1.55; color: var(--dim); }
.note-under b { color: var(--muted); }

.room-info {
  margin: 12px 0 0; padding: 12px 14px; background: var(--card-2);
  border: 1px solid var(--line); border-radius: 10px;
}
.room-info > div { display: flex; align-items: baseline; justify-content: space-between; gap: 12px; padding: 4px 0; }
.room-info span { font-size: 13px; color: var(--dim); }
.room-info b { font-size: 15px; letter-spacing: .06em; }

/* ── Dải nhắc khi mở trong ứng dụng khác ─────────────────────────────────── */
.inapp-bar {
  display: flex; align-items: flex-start; gap: 11px; margin: 0 0 16px;
  padding: 12px 14px; border-radius: 12px;
  background: rgba(244,148,37,.1); border: 1px solid rgba(244,148,37,.35);
  font-size: 13px; line-height: 1.55; color: var(--muted);
}
.inapp-bar .ic { color: var(--accent-2); width: 18px; height: 18px; margin-top: 1px; }
.inapp-bar button {
  margin: 8px 0 0; padding: 8px 14px; min-height: 38px;
  background: transparent; border: 1px solid var(--accent-2); border-radius: 8px;
  color: var(--accent-2); font-family: inherit; font-size: 13px; font-weight: 600; cursor: pointer;
}

/* Lưu ý trong thẻ phòng Zoom */
.rules { margin: 12px 0 0; padding: 0 0 0 18px; }
.rules li { margin: 0 0 7px; font-size: 13px; line-height: 1.55; color: var(--dim); }
.rules li:last-child { margin: 0; }
.rules b { color: var(--muted); }

/* ── Hộp thoại, chỉ hiện đúng lúc cần ────────────────────────────────────── */
.modal-nen {
  position: fixed; inset: 0; z-index: 50; display: flex; align-items: flex-end;
  justify-content: center; padding: 16px; background: rgba(0,0,0,.7);
  animation: hienNen .16s ease-out;
}
@keyframes hienNen { from { opacity: 0 } to { opacity: 1 } }
.modal-hop {
  width: 100%; max-width: 460px; padding: 22px 20px calc(22px + env(safe-area-inset-bottom));
  background: var(--card); border: 1px solid var(--line); border-radius: 18px 18px 14px 14px;
  animation: truotLen .2s ease-out;
}
@keyframes truotLen { from { transform: translateY(24px) } to { transform: translateY(0) } }
.modal-hop h3 { margin: 0 0 10px; font-size: 18px; }
.modal-hop p { margin: 0 0 12px; font-size: 15px; line-height: 1.6; color: var(--muted); }
.modal-nhe { font-size: 13px !important; color: var(--dim) !important; }
.modal-loi { margin: 12px 0 0 !important; font-size: 13px !important; color: var(--warn) !important; }
@media (min-width: 560px) { .modal-nen { align-items: center; } .modal-hop { border-radius: 16px; } }