/* =============================================================
   HSTT Student Dashboard
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Rubik:wght@400;500;600;700;800&family=Poppins:wght@300;400;500;600;700&display=swap');

#hstt-student-dashboard {
  --hstu-blue-deep:  #1a57a0;
  --hstu-blue-mid:   #2671BC;
  --hstu-orange:     #E97700;
  --hstu-bg:         #F4F7FB;
  --hstu-white:      #FFFFFF;
  --hstu-cream:      #F0F4FA;
  --hstu-border:     #C8D5E8;
  --hstu-charcoal:   #1C2B3A;
  --hstu-grey:       #6278A0;
  --hstu-grey-light: #DDE6F2;
  --hstu-font-head:  'Rubik', sans-serif;
  --hstu-font-body:  'Poppins', sans-serif;
  --hstu-shadow:     0 2px 16px rgba(38,113,188,0.09);
  --hstu-shadow-lg:  0 4px 28px rgba(38,113,188,0.13);

  font-family: var(--hstu-font-body);
  background: var(--hstu-bg);
  min-height: 100vh;
  color: var(--hstu-charcoal);
}

/* =============================================================
   HEADER
   ============================================================= */
.hstu-header {
  background: linear-gradient(135deg, #0d3b7a 0%, #1a57a0 40%, #2671BC 100%);
  padding: 32px 48px 28px;
}

.hstu-header-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 900px;
  margin: 0 auto 24px;
}

.hstu-header-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--hstu-font-head);
  font-size: 22px;
  font-weight: 800;
  color: #ffffff;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.hstu-header-title svg { color: rgba(255,255,255,0.8); flex-shrink: 0; }

.hstu-header-links {
  display: flex;
  align-items: center;
  gap: 10px;
}

.hstu-back-btn,
.hstu-logout-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: rgba(255,255,255,0.12);
  color: rgba(255,255,255,0.85);
  border: 1px solid rgba(255,255,255,0.22);
  border-radius: 8px;
  padding: 8px 16px;
  font-family: var(--hstu-font-body);
  font-size: 13px;
  font-weight: 500;
  text-decoration: none;
  transition: background 0.18s;
  cursor: pointer;
}

.hstu-back-btn:hover,
.hstu-logout-btn:hover {
  background: rgba(255,255,255,0.22);
  color: #ffffff;
}

.hstu-header-user {
  display: flex;
  align-items: center;
  gap: 16px;
  max-width: 900px;
  margin: 0 auto;
}

.hstu-avatar {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  border: 3px solid rgba(255,255,255,0.3);
  object-fit: cover;
  flex-shrink: 0;
}

.hstu-welcome {
  font-size: 11px;
  color: rgba(255,255,255,0.6);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 3px;
}

.hstu-name {
  font-family: var(--hstu-font-head);
  font-size: 18px;
  font-weight: 700;
  color: #ffffff;
}

/* =============================================================
   MAIN
   ============================================================= */
.hstu-main {
  max-width: 900px;
  margin: 0 auto;
  padding: 44px 32px 80px;
}

.hstu-empty {
  text-align: center;
  padding: 80px 24px;
  color: var(--hstu-grey);
  font-size: 15px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

/* =============================================================
   GRADE SECTION
   ============================================================= */
.hstu-grade-section { margin-bottom: 40px; }

.hstu-grade-header {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--hstu-font-head);
  font-size: 17px;
  font-weight: 700;
  color: var(--hstu-blue-deep);
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 2px solid var(--hstu-grey-light);
}

.hstu-grade-header svg { color: var(--hstu-blue-mid); flex-shrink: 0; }

.hstu-no-quiz {
  font-size: 14px;
  color: var(--hstu-grey);
  font-style: italic;
  padding: 12px 0;
}

/* =============================================================
   QUIZ BLOCKS
   ============================================================= */
.hstu-quiz-grid {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.hstu-quiz-block {
  background: var(--hstu-white);
  border: 1px solid var(--hstu-border);
  border-radius: 12px;
  box-shadow: var(--hstu-shadow);
  overflow: hidden;
  transition: box-shadow 0.18s;
}

.hstu-quiz-block:hover { box-shadow: var(--hstu-shadow-lg); }

.hstu-quiz-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 28px;
  gap: 24px;
}

.hstu-quiz-left {
  display: flex;
  align-items: center;
  gap: 18px;
  flex: 1;
  min-width: 0;
}

.hstu-quiz-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background: var(--hstu-cream);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--hstu-blue-mid);
}

.hstu-quiz-info { min-width: 0; }

.hstu-quiz-title {
  font-family: var(--hstu-font-head);
  font-size: 16px;
  font-weight: 600;
  color: var(--hstu-charcoal);
  margin-bottom: 4px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.hstu-quiz-sub {
  font-size: 12px;
  color: var(--hstu-grey);
  font-weight: 400;
}

.hstu-quiz-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
}

/* Score badge */
.hstu-score-display {
  display: flex;
  align-items: center;
  gap: 8px;
  background: var(--hstu-cream);
  border: 1px solid var(--hstu-border);
  border-radius: 8px;
  padding: 8px 14px;
}

.hstu-grade-letter {
  font-family: var(--hstu-font-head);
  font-size: 18px;
  font-weight: 800;
  color: var(--hstu-blue-deep);
  line-height: 1;
}

.hstu-score-pct {
  font-size: 14px;
  font-weight: 600;
  color: var(--hstu-grey);
}

/* My Results button */
.hstu-results-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--hstu-cream);
  color: var(--hstu-blue-mid);
  border: 1px solid var(--hstu-border);
  border-radius: 8px;
  padding: 10px 16px;
  font-family: var(--hstu-font-body);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.18s, border-color 0.18s, color 0.18s;
}

.hstu-results-btn:hover {
  background: var(--hstu-grey-light);
  border-color: var(--hstu-blue-mid);
  color: var(--hstu-blue-mid);
}

.hstu-chevron {
  transition: transform 0.22s ease;
  flex-shrink: 0;
}

/* Retake / Start button */
.hstu-take-btn {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  background: var(--hstu-orange);
  color: #ffffff;
  font-family: var(--hstu-font-body);
  font-size: 13px;
  font-weight: 700;
  padding: 10px 22px;
  border-radius: 8px;
  text-decoration: none;
  white-space: nowrap;
  transition: background 0.18s;
}

.hstu-take-btn:hover { background: #c46500; color: #ffffff; }

/* =============================================================
   RESULTS DRAWER
   ============================================================= */
.hstu-results-drawer {
  border-top: 1px solid var(--hstu-grey-light);
  background: var(--hstu-cream);
}

.hstu-drawer-inner { padding: 24px 28px; }

.hstu-drawer-label {
  font-size: 11px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.09em;
  color: var(--hstu-grey);
  margin-bottom: 16px;
}

/* =============================================================
   CATEGORY CHIPS
   ============================================================= */
.hstu-cat-chips {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hstu-cat-chip {
  display: grid;
  grid-template-columns: 200px 1fr 44px;
  align-items: center;
  gap: 16px;
  padding: 10px 14px;
  background: var(--hstu-white);
  border-radius: 7px;
  border: 1px solid var(--hstu-border);
}

.hstu-cat-name {
  font-size: 13px;
  font-weight: 500;
  color: var(--hstu-charcoal);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: default;
}

/* Bar track — single definition, no duplicates */
.hstu-cat-bar-wrap {
  position: relative;
  height: 10px;
  background: var(--hstu-grey-light);
  border-radius: 4px;
  overflow: hidden;
}

/* Fill bar — single definition */
.hstu-cat-bar {
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  border-radius: 4px;
  background: var(--hstu-orange);
  min-width: 2px;
  transition: width 0.5s ease;
}

.hstu-cat-val {
  font-size: 12px;
  font-weight: 700;
  color: var(--hstu-blue-deep);
  text-align: right;
  white-space: nowrap;
}

/* =============================================================
   CROSS-BROWSER COMPATIBILITY
   ============================================================= */

#hstt-student-dashboard *,
#hstt-student-dashboard *::before,
#hstt-student-dashboard *::after {
  -webkit-box-sizing: border-box;
  box-sizing: border-box;
}

#hstt-student-dashboard button,
#hstt-student-dashboard a {
  font-family: var(--hstu-font-body);
  -moz-appearance: none;
  -webkit-appearance: none;
  appearance: none;
  -webkit-tap-highlight-color: transparent;
}

#hstt-student-dashboard svg {
  overflow: visible;
  -webkit-flex-shrink: 0;
  flex-shrink: 0;
}

/* Fix iOS input zoom */
#hstt-student-dashboard input {
  font-size: 16px;
}

/* Smooth font rendering */
#hstt-student-dashboard {
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Fix Safari flex */
.hstu-quiz-row,
.hstu-quiz-left,
.hstu-quiz-right,
.hstu-header-top,
.hstu-header-links,
.hstu-header-user {
  display: -webkit-flex;
  display: flex;
}

/* =============================================================
   RESPONSIVE — 700px
   ============================================================= */
@media (max-width: 700px) {
  .hstu-header { padding: 20px 16px; }
  .hstu-header-top { margin-bottom: 16px; }
  .hstu-header-title { font-size: 16px; }
  .hstu-main { padding: 28px 16px 60px; }

  .hstu-quiz-row {
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: flex-start;
    align-items: flex-start;
    padding: 18px 20px;
    gap: 14px;
  }

  .hstu-quiz-right {
    width: 100%;
    -webkit-justify-content: flex-start;
    justify-content: flex-start;
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 8px;
  }

  .hstu-take-btn {
    -webkit-flex: 1;
    flex: 1;
    -webkit-justify-content: center;
    justify-content: center;
    text-align: center;
  }

  .hstu-results-btn {
    -webkit-flex: 1;
    flex: 1;
    -webkit-justify-content: center;
    justify-content: center;
  }

  .hstu-cat-chip {
    grid-template-columns: 110px 1fr 36px;
    gap: 8px;
  }

  .hstu-drawer-inner { padding: 16px; }

  .hstu-quiz-title { font-size: 15px; }
}

/* =============================================================
   RESPONSIVE — 420px (small phones)
   ============================================================= */
@media (max-width: 500px) {
  .hstu-header-top {
    -webkit-flex-wrap: wrap;
    flex-wrap: wrap;
    gap: 10px;
  }

  .hstu-header-links {
    -webkit-flex-direction: column;
    flex-direction: column;
    -webkit-align-items: flex-end;
    align-items: flex-end;
    gap: 6px;
  }

  .hstu-back-btn,
  .hstu-logout-btn {
    font-size: 12px;
    padding: 6px 12px;
    white-space: nowrap;
  }
}

@media (max-width: 420px) {
  .hstu-header { padding: 16px 12px; }
  .hstu-header-title { font-size: 14px; gap: 6px; }

  .hstu-back-btn,
  .hstu-logout-btn {
    padding: 6px 10px;
    font-size: 12px;
  }

  .hstu-main { padding: 20px 12px 48px; }

  .hstu-quiz-row { padding: 14px 16px; }

  .hstu-quiz-icon { width: 38px; height: 38px; }

  .hstu-quiz-title { font-size: 14px; }

  .hstu-score-display { padding: 6px 10px; }
  .hstu-grade-letter { font-size: 15px; }
  .hstu-score-pct { font-size: 12px; }

  .hstu-cat-chip {
    grid-template-columns: 90px 1fr 32px;
    gap: 6px;
    padding: 8px 10px;
  }

  .hstu-cat-name { font-size: 11px; }
  .hstu-cat-val { font-size: 11px; }
}