/* ============================================================
   MODULE: Thi HSK — chỉ dùng biến từ tokens.css
   ============================================================ */
.hsk-level-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
}
@media (min-width: 600px) { .hsk-level-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 1000px) { .hsk-level-grid { grid-template-columns: 1fr 1fr 1fr; } }

.hsk-level-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-left: 4px solid var(--curr-hsk);
  border-radius: var(--radius-md);
  padding: var(--space-4);
}
.hsk-level-card__title { font-size: var(--font-size-lg); font-weight: 700; }
.hsk-level-card__subtitle { color: var(--color-text-muted); font-size: var(--font-size-sm); margin-bottom: var(--space-2); }
.hsk-level-card__desc { color: var(--color-text-muted); font-size: var(--font-size-sm); margin-bottom: var(--space-3); }
.hsk-level-card__meta { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-3); }

/* --- Trang thi --- */
.hsk-exam-shell { max-width: 700px; margin: 0 auto; }
.hsk-progress-bar { height: 6px; background: var(--color-surface-alt); border-radius: 999px; overflow: hidden; margin-bottom: var(--space-4); }
.hsk-progress-bar__fill { height: 100%; background: var(--curr-hsk); transition: width .2s; }

.hsk-question-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: var(--space-4); }
.hsk-question-skill { font-size: 0.7rem; font-weight: 700; color: var(--curr-hsk); background: var(--curr-hsk-bg); padding: 2px var(--space-2); border-radius: 999px; }
.hsk-question-text { font-size: var(--font-size-lg); margin: var(--space-2) 0 var(--space-3); }
.hsk-option-list { display: flex; flex-direction: column; gap: var(--space-2); }
.hsk-option {
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  border-radius: var(--radius-sm);
  padding: var(--space-3);
  text-align: left;
  cursor: pointer;
  font-size: var(--font-size-base);
}
.hsk-option:hover { border-color: var(--curr-hsk); }
.hsk-option.is-selected { background: var(--curr-hsk-bg); border-color: var(--curr-hsk); }

.hsk-result-summary { text-align: center; padding: var(--space-5) 0; }
.hsk-result-summary__score { font-size: 3rem; font-weight: 700; color: var(--curr-hsk); }
.hsk-result-summary__pass { font-size: var(--font-size-lg); font-weight: 600; margin: var(--space-2) 0; }
.hsk-review-item { border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-3); margin-bottom: var(--space-2); }
.hsk-review-item.is-correct { border-left: 4px solid var(--color-success); }
.hsk-review-item.is-wrong { border-left: 4px solid var(--color-error); }

/* ============================================================
   NÂNG CẤP: Dashboard / Mode / Timer / Navigator / Result / Câu
   sai / Lịch sử / Tiến bộ — mobile-first, không tràn ngang từ
   320px trở lên (kiểm tra XXV/LII).
   ============================================================ */
.hsk-dashboard, .container { width: 100%; max-width: 1100px; margin: 0 auto; padding-left: var(--space-3); padding-right: var(--space-3); box-sizing: border-box; }

.hsk-hero { text-align: center; margin-bottom: var(--space-4); }
.hsk-hero__title { font-size: clamp(1.6rem, 5vw, 2.2rem); font-weight: 800; letter-spacing: 0.02em; margin: 0 0 4px; color: var(--curr-hsk); }
.hsk-hero__subtitle { color: var(--color-text-muted); margin: 0; }

.hsk-quick-menu {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2);
  margin-bottom: var(--space-4);
}
@media (min-width: 640px) { .hsk-quick-menu { grid-template-columns: repeat(4, 1fr); } }
.hsk-quick-menu__item {
  display: flex; flex-direction: column; align-items: center; gap: 4px;
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-2); text-decoration: none; color: var(--color-text); font-size: var(--text-body-sm); font-weight: 600;
  min-width: 0; text-align: center;
}
.hsk-quick-menu__item span { font-size: 1.3rem; }
.hsk-quick-menu__item:hover { border-color: var(--curr-hsk); }

.hsk-level-card__actions { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.hsk-level-card__actions a { flex: 1 1 120px; text-align: center; min-width: 0; }

.hsk-page-head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-2); }

/* ---------------- Màn hình thiết lập (chọn chế độ) ---------------- */
.hsk-setup-card { text-align: left; }
.hsk-mode-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-2); margin: var(--space-3) 0; }
@media (min-width: 560px) { .hsk-mode-grid { grid-template-columns: repeat(3, 1fr); } }
.hsk-mode-card {
  display: flex; flex-direction: column; gap: 4px; text-align: left;
  border: 2px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-md);
  padding: var(--space-3); cursor: pointer; min-width: 0;
}
.hsk-mode-card.is-active { border-color: var(--curr-hsk); background: var(--curr-hsk-bg); }
.hsk-mode-card__icon { font-size: 1.4rem; }
.hsk-mode-card__label { font-weight: 700; }
.hsk-mode-card__desc { font-size: var(--text-caption); color: var(--color-text-muted); }

.hsk-setup-row { margin: var(--space-3) 0; }
.hsk-setup-row__label { display: block; font-weight: 600; margin-bottom: var(--space-2); font-size: var(--text-body-sm); }
.hsk-chip-group { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.hsk-chip {
  border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-full);
  padding: 6px var(--space-3); font-size: var(--text-body-sm); font-weight: 600; cursor: pointer; min-height: 36px;
}
.hsk-chip.is-active { border-color: var(--curr-hsk); background: var(--curr-hsk-bg); color: var(--curr-hsk); }

/* ---------------- Thanh trên cùng khi làm bài + Timer ---------------- */
.hsk-exam-topbar {
  display: flex; align-items: center; justify-content: space-between; gap: var(--space-2);
  margin-bottom: var(--space-2); flex-wrap: wrap;
}
.hsk-exam-topbar__level { font-weight: 700; }
.hsk-exam-topbar__count { color: var(--color-text-muted); font-size: var(--text-body-sm); }
.hsk-timer {
  font-family: var(--font-family-mono, monospace); font-weight: 700; font-size: var(--font-size-lg);
  padding: 4px var(--space-3); border-radius: var(--radius-full); background: var(--color-surface-alt); color: var(--color-text);
}
.hsk-timer.is-warning { background: var(--color-warning-bg); color: var(--color-warning); }
.hsk-timer.is-critical { background: var(--color-error-bg); color: var(--color-error); animation: hsk-timer-pulse 1s infinite; }
@keyframes hsk-timer-pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.55; } }

/* ---------------- Question card: head + bookmark + feedback ---------------- */
.hsk-question-card__head { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; }
.hsk-bookmark-btn {
  border: 1px solid var(--color-border); background: var(--color-surface); border-radius: var(--radius-full);
  padding: 4px var(--space-3); font-size: var(--text-caption); font-weight: 600; cursor: pointer; color: var(--color-text-muted); min-height: 32px;
}
.hsk-bookmark-btn.is-marked { border-color: #d4a017; background: #fff7e0; color: #8a6100; }
.hsk-option.is-selected.is-correct { background: var(--color-success-bg); border-color: var(--color-success); }
.hsk-option.is-selected.is-wrong { background: var(--color-error-bg); border-color: var(--color-error); }
.hsk-option.is-correct-reveal { border-color: var(--color-success); box-shadow: inset 0 0 0 1px var(--color-success); }
.hsk-option:disabled { cursor: default; }
.hsk-option { min-height: 44px; }
.hsk-feedback { margin-top: var(--space-3); padding: var(--space-3); border-radius: var(--radius-md); }
.hsk-feedback.is-correct { background: var(--color-success-bg); color: var(--color-success); }
.hsk-feedback.is-wrong { background: var(--color-error-bg); color: var(--color-error); }
.hsk-feedback p { color: var(--color-text); }

/* ---------------- Question Navigator ---------------- */
.hsk-navigator {
  display: flex; flex-wrap: nowrap; gap: 6px; overflow-x: auto; -webkit-overflow-scrolling: touch;
  margin: var(--space-3) 0; padding: var(--space-2); background: var(--color-surface-alt); border-radius: var(--radius-md);
}
@media (min-width: 640px) { .hsk-navigator { flex-wrap: wrap; overflow-x: visible; } }
.hsk-nav-cell {
  flex: 0 0 auto; width: 36px; height: 36px; border-radius: var(--radius-sm); border: 1px solid var(--color-border);
  background: var(--color-surface); font-size: var(--text-caption); font-weight: 700; cursor: pointer; color: var(--color-text-muted);
}
.hsk-nav-cell.is-todo { background: var(--color-surface); }
.hsk-nav-cell.is-done { background: var(--color-success-bg); color: var(--color-success); border-color: var(--color-success); }
.hsk-nav-cell.is-marked { background: #fff7e0; color: #8a6100; border-color: #d4a017; }
.hsk-nav-cell.is-current { outline: 2px solid var(--curr-hsk); outline-offset: 1px; }

.hsk-exam-bottombar { display: flex; justify-content: space-between; gap: var(--space-2); margin-top: var(--space-3); flex-wrap: wrap; }
.hsk-exam-bottombar button { min-width: 120px; min-height: 44px; }

/* ---------------- Kết quả ---------------- */
.hsk-result-header { text-align: center; padding: var(--space-4) 0; }
.hsk-result-header__title { font-size: var(--font-size-lg); font-weight: 700; }
.hsk-result-header__level { color: var(--color-text-muted); margin: 4px 0; }
.hsk-result-header__score { font-size: clamp(2rem, 8vw, 3rem); font-weight: 800; color: var(--curr-hsk); margin: var(--space-2) 0; }

.hsk-skill-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr)); gap: var(--space-2); margin-bottom: var(--space-4); }
.hsk-skill-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-3); text-align: center; min-width: 0; }
.hsk-skill-card__label { font-weight: 700; margin-bottom: 4px; }
.hsk-skill-card__pct { font-size: var(--font-size-lg); font-weight: 800; color: var(--curr-hsk); }
.hsk-skill-card__count { font-size: var(--text-caption); color: var(--color-text-muted); margin-top: 4px; }

.hsk-strength-box, .hsk-weakness-box { border-radius: var(--radius-md); padding: var(--space-3); margin-bottom: var(--space-3); }
.hsk-strength-box { background: var(--color-success-bg); }
.hsk-weakness-box { background: var(--color-warning-bg); }
.hsk-strength-box ul, .hsk-weakness-box ol { margin: var(--space-2) 0 0; padding-left: 20px; }

.hsk-cta-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-2); margin-bottom: var(--space-4); }
@media (min-width: 560px) { .hsk-cta-grid { grid-template-columns: repeat(4, 1fr); } }
.hsk-cta-grid > * { text-align: center; min-width: 0; min-height: 44px; }

/* ---------------- Câu sai / Lịch sử / Tiến bộ ---------------- */
.hsk-cau-sai-toolbar { display: flex; gap: var(--space-2); flex-wrap: wrap; margin-bottom: var(--space-4); align-items: center; }
.hsk-select { padding: var(--space-2) var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-sm); background: var(--color-surface); color: var(--color-text); min-height: 40px; }

.hsk-history-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-2); min-width: 0; }
@media (min-width: 560px) { .hsk-history-grid { grid-template-columns: 1fr 1fr; } }
@media (min-width: 900px) { .hsk-history-grid { grid-template-columns: 1fr 1fr 1fr; } }
.hsk-history-card {
  display: flex; flex-direction: column; gap: 6px; text-align: left; cursor: pointer;
  padding: var(--space-3); border: 1px solid var(--color-border); border-radius: var(--radius-md);
  background: var(--color-surface); min-width: 0; width: 100%; font-family: inherit;
}
.hsk-history-card__top { display: flex; align-items: center; justify-content: space-between; gap: var(--space-2); flex-wrap: wrap; }
.hsk-history-card__score { font-size: var(--font-size-lg); font-weight: 800; color: var(--curr-hsk); line-height: 1; }
.hsk-history-card__max { font-size: var(--text-body-sm); font-weight: 600; color: var(--color-text-muted); }
.hsk-history-card__meta { font-size: var(--text-caption); color: var(--color-text-muted); overflow-wrap: anywhere; }
.hsk-history-card__skills { display: flex; gap: 6px; flex-wrap: wrap; margin-top: 2px; }
.hsk-history-card__skill { font-size: var(--text-caption); background: var(--color-surface-alt); border-radius: 999px; padding: 2px 8px; white-space: nowrap; }

.hsk-stat-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--space-2); margin-bottom: var(--space-4); }
@media (min-width: 640px) { .hsk-stat-grid { grid-template-columns: repeat(5, 1fr); } }
.hsk-stat-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: var(--space-3); text-align: center; min-width: 0; }
.hsk-stat-card__value { font-size: var(--font-size-lg); font-weight: 800; color: var(--curr-hsk); }
.hsk-stat-card__label { font-size: var(--text-caption); color: var(--color-text-muted); margin-top: 4px; }

.hsk-timeline { display: flex; flex-direction: column; gap: var(--space-2); }
.hsk-timeline-item { display: flex; align-items: center; gap: var(--space-2); }
.hsk-timeline-item__label { flex: 0 0 60px; font-size: var(--text-caption); color: var(--color-text-muted); }
.hsk-timeline-item .progress-track { flex: 1 1 auto; min-width: 0; }
.hsk-timeline-item__score { flex: 0 0 40px; text-align: right; font-weight: 700; font-size: var(--text-body-sm); }

.hsk-empty-state { text-align: center; padding: var(--space-6) var(--space-3); color: var(--color-text-muted); }
.hsk-empty-state__icon { font-size: 2.4rem; margin-bottom: var(--space-2); }

/* progress-track/fill dùng chung cho Timeline + Skill card + thanh tiến độ câu hỏi */
.progress-track { height: 8px; background: var(--color-surface-alt); border-radius: 999px; overflow: hidden; }
.progress-fill { height: 100%; background: var(--curr-hsk); transition: width .2s; }

@media (max-width: 480px) {
  .hsk-history-card { padding: var(--space-2) var(--space-3); }
}