/* ============================================================
   Inspector Prep — glass / gradient-mesh theme
   Dark glass by default, light glass via [data-theme="light"]
   ============================================================ */

:root {
  --bg: #0A0C14;
  --glass-bg: rgba(255,255,255,0.055);
  --glass-bg-strong: rgba(255,255,255,0.09);
  --glass-border: rgba(255,255,255,0.14);
  --glass-shadow: 0 8px 40px rgba(0,0,0,0.45);
  --text: #ECEFF6;
  --text-mute: #99A2B8;
  --text-dim: #6A7288;

  --blue:   #4F8CFF;
  --purple: #9B6BFF;
  --pink:   #FF6FA5;
  --green:  #34D399;
  --gold:   #FFC169;
  --red:    #FB6B6B;

  --grad-primary: linear-gradient(135deg, var(--blue), var(--purple) 55%, var(--pink));
  --grad-good: linear-gradient(135deg, var(--green), #22B8CF);

  --radius-lg: 22px;
  --radius-md: 16px;
  --radius-sm: 10px;

  --serif: Georgia, "Iowan Old Style", "Palatino Linotype", serif;
  --sans: -apple-system, "SF Pro Text", "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --mono: "SF Mono", "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

[data-theme="light"] {
  --bg: #EEF1F9;
  --glass-bg: rgba(255,255,255,0.55);
  --glass-bg-strong: rgba(255,255,255,0.72);
  --glass-border: rgba(255,255,255,0.85);
  --glass-shadow: 0 8px 32px rgba(70,80,120,0.15);
  --text: #1B2233;
  --text-mute: #5C6478;
  --text-dim: #838BA0;
}

* { box-sizing: border-box; }
html, body {
  margin: 0; padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 15px;
  min-height: 100vh;
  transition: background 0.4s ease, color 0.4s ease;
}
button, input, select, textarea { font-family: inherit; font-size: inherit; }

/* ---------------- gradient mesh orbs ---------------- */
.orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(90px);
  opacity: 0.55;
  z-index: 0;
  pointer-events: none;
  animation: drift 24s ease-in-out infinite alternate;
}
[data-theme="light"] .orb { opacity: 0.35; }
.orb-1 { width: 520px; height: 520px; top: -120px; left: -100px; background: radial-gradient(circle, var(--blue), transparent 70%); animation-duration: 26s; }
.orb-2 { width: 460px; height: 460px; top: 20%; right: -140px; background: radial-gradient(circle, var(--purple), transparent 70%); animation-duration: 30s; }
.orb-3 { width: 420px; height: 420px; bottom: -140px; left: 18%; background: radial-gradient(circle, var(--pink), transparent 70%); animation-duration: 22s; }
.orb-4 { width: 380px; height: 380px; bottom: 10%; right: 12%; background: radial-gradient(circle, var(--green), transparent 70%); animation-duration: 34s; }

@keyframes drift {
  0%   { transform: translate(0, 0) scale(1); }
  100% { transform: translate(40px, 30px) scale(1.12); }
}

/* ---------------- glass utility ---------------- */
.glass {
  background: var(--glass-bg);
  backdrop-filter: blur(28px) saturate(180%);
  -webkit-backdrop-filter: blur(28px) saturate(180%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--glass-shadow);
}
.glass-thin {
  background: var(--glass-bg);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-md);
}

/* ================= LAYOUT ================= */
.app {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: 250px 1fr;
  min-height: 100vh;
  gap: 20px;
  padding: 20px;
}

/* ================= SIDEBAR ================= */
.sidebar {
  display: flex;
  flex-direction: column;
  padding: 22px 16px;
  position: sticky;
  top: 20px;
  height: calc(100vh - 40px);
}

.crest { display: flex; align-items: center; gap: 12px; margin-bottom: 28px; padding: 0 6px; }
.crest-badge {
  width: 42px; height: 42px;
  border-radius: 13px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: white; letter-spacing: 0.5px;
  flex-shrink: 0;
  box-shadow: 0 6px 18px rgba(155,107,255,0.35);
}
.crest-title { font-size: 16px; font-weight: 600; line-height: 1.2; color: var(--text); }
.crest-sub { font-size: 10.5px; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.06em; margin-top: 2px; }

.nav { display: flex; flex-direction: column; gap: 3px; flex: 1; }
.nav-item {
  display: flex; align-items: center; gap: 10px;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-mute);
  padding: 11px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 13.5px;
  transition: background 0.18s, color 0.18s;
}
.nav-item .dot { width: 6px; height: 6px; border-radius: 50%; background: var(--text-dim); transition: background 0.2s, box-shadow 0.2s; flex-shrink: 0; }
.nav-item:hover { background: var(--glass-bg-strong); color: var(--text); }
.nav-item.active {
  background: var(--glass-bg-strong);
  color: var(--text);
  font-weight: 600;
}
.nav-item.active .dot { background: var(--pink); box-shadow: 0 0 8px var(--pink); }

.sidebar-footer { border-top: 1px solid var(--glass-border); padding-top: 16px; }
.theme-toggle { margin-bottom: 14px; }
.theme-btn {
  width: 100%; padding: 8px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong);
  color: var(--text); cursor: pointer; font-size: 15px;
}
.exam-date-label { display: block; font-size: 10.5px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-dim); margin-bottom: 6px; }
#examDateInput {
  width: 100%; padding: 7px 8px; border-radius: var(--radius-sm);
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong); color: var(--text);
  margin-bottom: 8px; color-scheme: dark;
}
[data-theme="light"] #examDateInput { color-scheme: light; }
.countdown { font-size: 13px; font-weight: 600; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* ================= MAIN ================= */
.main { max-width: 1040px; padding-bottom: 60px; }

.view { display: none; animation: fadeIn 0.35s ease; }
.view.active { display: block; }
@keyframes fadeIn { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }

.view-header h1 { font-size: 26px; margin: 4px 0 4px; color: var(--text); font-weight: 700; letter-spacing: -0.01em; }
.view-sub { color: var(--text-mute); margin: 0 0 26px; font-size: 13.5px; max-width: 640px; }

.section-title { font-size: 16px; margin: 32px 0 14px; color: var(--text); font-weight: 600; }

/* ---- stamp row ---- */
.stamp-row { display: flex; gap: 6px; margin-bottom: 16px; padding: 14px; flex-wrap: wrap; }
.stamp {
  width: 30px; height: 34px;
  border-radius: 8px;
  background: var(--glass-bg-strong);
  border: 1px solid var(--glass-border);
  display: flex; align-items: center; justify-content: center;
  font-family: var(--mono);
  font-size: 10px;
  color: var(--text-dim);
  position: relative;
}
.stamp.done { background: var(--grad-good); color: white; font-weight: 700; border-color: transparent; }
.stamp.today { box-shadow: 0 0 0 2px var(--pink); }

.daily-banner {
  padding: 12px 16px;
  font-size: 13px;
  margin-bottom: 24px;
  display: none;
  border-left: 3px solid var(--gold);
}
.daily-banner.show { display: block; }

.stat-cards { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; margin-bottom: 8px; }
.stat-card { padding: 18px; background: var(--glass-bg); backdrop-filter: blur(20px); border: 1px solid var(--glass-border); border-radius: var(--radius-md); }
.stat-card .num { font-size: 26px; font-weight: 700; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.stat-card .lbl { font-size: 11px; color: var(--text-mute); text-transform: uppercase; letter-spacing: 0.05em; margin-top: 4px; }

.progress-list { display: flex; flex-direction: column; gap: 10px; }
.progress-item { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 14px 18px; backdrop-filter: blur(20px); }
.progress-item-top { display: flex; justify-content: space-between; font-size: 13px; margin-bottom: 8px; color: var(--text-mute); }
.progress-item-top strong { color: var(--text); }
.progress-bar-track { height: 7px; background: var(--glass-bg-strong); border-radius: 4px; overflow: hidden; }
.progress-bar-fill { height: 100%; background: var(--grad-primary); border-radius: 4px; transition: width 0.5s ease; }

/* ---- Practice ---- */
.practice-picker { display: flex; align-items: center; gap: 8px; margin-bottom: 26px; flex-wrap: wrap; padding: 12px 14px; }
.pill-btn {
  border: 1px solid var(--glass-border); background: var(--glass-bg-strong); color: var(--text-mute);
  padding: 7px 14px; border-radius: 999px; cursor: pointer; font-size: 12.5px; transition: all 0.15s;
}
.pill-btn.active { background: var(--grad-primary); border-color: transparent; color: white; font-weight: 600; }
.include-mastered { font-size: 12.5px; color: var(--text-mute); display: flex; align-items: center; gap: 5px; margin-left: 6px; }
.start-btn {
  background: var(--grad-primary); border: none; color: white;
  padding: 9px 18px; border-radius: 999px; cursor: pointer;
  font-weight: 600; font-size: 13px; margin-left: auto;
  box-shadow: 0 6px 18px rgba(155,107,255,0.3);
  transition: transform 0.15s;
}
.start-btn:hover { transform: translateY(-1px); }

.practice-area { min-height: 200px; }
.empty-state {
  border: 1px dashed var(--glass-border); border-radius: var(--radius-md);
  padding: 40px; text-align: center; color: var(--text-mute); font-size: 14px;
}

.q-card {
  background: var(--glass-bg); backdrop-filter: blur(24px);
  border: 1px solid var(--glass-border); border-radius: var(--radius-lg);
  padding: 26px 30px; max-width: 640px;
  animation: fadeIn 0.3s ease;
}
.q-meta { font-size: 11px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--gold); margin-bottom: 12px; font-weight: 600; }
.q-text { font-size: 19px; color: var(--text); margin-bottom: 20px; line-height: 1.45; font-weight: 600; }
.q-opts { display: flex; flex-direction: column; gap: 8px; margin-bottom: 18px; }
.q-opt {
  text-align: left; padding: 12px 16px; border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  background: var(--glass-bg-strong); cursor: pointer; font-size: 14px; color: var(--text);
  transition: transform 0.12s, border-color 0.12s;
}
.q-opt:hover:not(.disabled) { border-color: var(--purple); transform: translateX(2px); }
.q-opt.correct { background: rgba(52,211,153,0.18); border-color: var(--green); color: var(--green); font-weight: 700; animation: pulseGood 0.5s ease; }
.q-opt.wrong { background: rgba(251,107,107,0.16); border-color: var(--red); color: var(--red); font-weight: 700; }
.q-opt.disabled { pointer-events: none; }
@keyframes pulseGood { 0% { box-shadow: 0 0 0 0 rgba(52,211,153,0.5);} 100% { box-shadow: 0 0 0 10px rgba(52,211,153,0);} }

.q-footer { display: flex; align-items: center; gap: 10px; font-size: 12.5px; color: var(--text-mute); flex-wrap: wrap; }
.q-footer .spacer { flex: 1; }
.ghost-btn { background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 999px; padding: 8px 16px; cursor: pointer; font-size: 12.5px; color: var(--text); }
.ghost-btn:hover { border-color: var(--purple); }
.ghost-btn.primary { background: var(--grad-primary); border-color: transparent; color: white; font-weight: 600; }
.ghost-btn.danger { background: rgba(248, 113, 113, 0.12); border-color: rgba(248, 113, 113, 0.4); color: #f87171; }
.ghost-btn.danger:hover { background: rgba(248, 113, 113, 0.22); border-color: rgba(248, 113, 113, 0.6); }
.kbd-hint { font-size: 11px; color: var(--text-dim); margin-top: 14px; }
.kbd-hint kbd { background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 4px; padding: 1px 6px; font-family: var(--mono); }

/* ---- Sections ---- */
.sections-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 16px; }
.section-card { background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-md); padding: 18px; backdrop-filter: blur(20px); }
.section-card h3 { font-size: 15px; margin: 0 0 12px; color: var(--text); font-weight: 700; }
.unit-row { display: flex; justify-content: space-between; align-items: center; font-size: 13px; padding: 7px 0; border-top: 1px solid var(--glass-border); color: var(--text-mute); }
.unit-row:first-of-type { border-top: none; }
.unit-count { color: var(--text-dim); font-family: var(--mono); font-size: 11.5px; }
.unit-practice-btn { background: none; border: none; color: var(--pink); cursor: pointer; font-size: 12px; font-weight: 700; }

/* ---- Add / forms ---- */
.add-tabs { display: flex; gap: 6px; margin-bottom: 20px; }
.add-tab { background: var(--glass-bg-strong); border: 1px solid var(--glass-border); padding: 8px 16px; border-radius: 999px; cursor: pointer; font-size: 13px; color: var(--text-mute); }
.add-tab.active { background: var(--grad-primary); color: white; border-color: transparent; font-weight: 600; }
.add-panel { display: none; max-width: 560px; padding: 22px; }
.add-panel.active { display: block; }

label { display: block; font-size: 11.5px; text-transform: uppercase; letter-spacing: 0.04em; color: var(--text-dim); margin: 14px 0 5px; }
select, textarea, input[type=text] {
  width: 100%; padding: 10px 12px; border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  background: var(--glass-bg-strong); color: var(--text);
}
select option { background: #1b1e2b; color: var(--text); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.option-row { display: flex; align-items: center; gap: 10px; margin-bottom: 8px; }
.option-row input[type=text] { flex: 1; }
.form-msg { margin-top: 12px; font-size: 13px; color: var(--green); }
.form-msg.error { color: var(--red); }

.hint { font-size: 12.5px; color: var(--text-mute); background: var(--glass-bg-strong); padding: 12px 14px; border-radius: var(--radius-sm); margin-bottom: 14px; }
.hint code { font-family: var(--mono); font-size: 11px; background: rgba(0,0,0,0.25); padding: 1px 4px; border-radius: 3px; }
#jsonInput { font-family: var(--mono); font-size: 12px; }
.form-row-inline { display: flex; gap: 10px; margin-top: 12px; align-items: center; }
.file-btn { border: 1px solid var(--glass-border); background: var(--glass-bg-strong); padding: 9px 14px; border-radius: 999px; cursor: pointer; font-size: 12.5px; position: relative; color: var(--text); }
.file-btn.small { padding: 7px 12px; font-size: 12px; }
.file-btn input[type=file] { position: absolute; inset: 0; opacity: 0; cursor: pointer; }

/* ---- Manage ---- */
.manage-toolbar { display: flex; justify-content: space-between; align-items: center; margin-bottom: 16px; flex-wrap: wrap; gap: 10px; }
.manage-filters { display: flex; gap: 8px; }
.backup-buttons { display: flex; gap: 8px; }
.manage-list { display: flex; flex-direction: column; gap: 8px; }
.manage-row {
  background: var(--glass-bg); border: 1px solid var(--glass-border); border-radius: var(--radius-sm);
  padding: 11px 16px; display: grid; grid-template-columns: 46px 1fr 90px 80px 90px 64px; align-items: center; gap: 10px; font-size: 12.5px;
  backdrop-filter: blur(16px);
}
.manage-row .tag { font-family: var(--mono); font-size: 10.5px; color: var(--gold); }
.manage-row .qtext { color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.badge { font-size: 10px; padding: 3px 8px; border-radius: 999px; text-align: center; text-transform: uppercase; letter-spacing: 0.03em; font-weight: 600; }
.badge.learning { background: rgba(79,140,255,0.18); color: var(--blue); }
.badge.review { background: rgba(255,193,105,0.18); color: var(--gold); }
.badge.mastered { background: rgba(52,211,153,0.18); color: var(--green); }
.reset-btn { background: var(--glass-bg-strong); border: 1px solid var(--glass-border); border-radius: 999px; padding: 4px 10px; font-size: 11px; cursor: pointer; color: var(--text); }
.delete-btn { background: rgba(248, 113, 113, 0.12); border: 1px solid rgba(248, 113, 113, 0.4); border-radius: 999px; padding: 4px 10px; font-size: 11px; cursor: pointer; color: #f87171; margin-left: 6px; }
.delete-btn:hover { background: rgba(248, 113, 113, 0.22); }
.edit-btn { background: rgba(79, 140, 255, 0.12); border: 1px solid rgba(79, 140, 255, 0.4); border-radius: 999px; padding: 4px 10px; font-size: 11px; cursor: pointer; color: #4F8CFF; margin-left: 6px; }
.edit-btn:hover { background: rgba(79, 140, 255, 0.22); }

/* ---- Mock Exam ---- */
.mock-intro { padding: 26px; max-width: 640px; }
.mock-intro h3 { margin-top: 0; font-size: 17px; }
.mock-intro p { color: var(--text-mute); font-size: 13.5px; line-height: 1.6; }
.mock-intro ul { color: var(--text-mute); font-size: 13px; padding-left: 18px; line-height: 1.8; }

.exam-header { display: flex; align-items: center; gap: 16px; padding: 14px 20px; margin-bottom: 16px; position: sticky; top: 20px; z-index: 5; }
.exam-timer { font-family: var(--mono); font-size: 20px; font-weight: 700; }
.exam-timer.low { color: var(--red); }
.exam-progress-text { color: var(--text-mute); font-size: 13px; }
.exam-header .spacer { flex: 1; }

.bubble-grid { display: flex; flex-wrap: wrap; gap: 5px; padding: 14px; margin-bottom: 16px; }
.bubble { width: 26px; height: 26px; border-radius: 7px; border: 1px solid var(--glass-border); background: var(--glass-bg-strong); display: flex; align-items: center; justify-content: center; font-size: 10px; color: var(--text-dim); cursor: pointer; font-family: var(--mono); }
.bubble.answered { background: var(--grad-primary); color: white; border-color: transparent; }
.bubble.current { box-shadow: 0 0 0 2px var(--pink); }

.result-card { padding: 30px; max-width: 640px; }
.result-score { font-size: 42px; font-weight: 800; background: var(--grad-primary); -webkit-background-clip: text; background-clip: text; color: transparent; }
.result-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; margin: 18px 0; }
.result-grid div { text-align: center; padding: 12px; background: var(--glass-bg-strong); border-radius: var(--radius-sm); }
.result-grid .n { font-size: 20px; font-weight: 700; }
.result-grid .l { font-size: 10.5px; color: var(--text-mute); text-transform: uppercase; }

/* ---- Analytics / charts ---- */
.analytics-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.chart-card { padding: 18px 20px; backdrop-filter: blur(20px); }
.chart-card.full { grid-column: 1 / -1; }
.chart-card h3 { font-size: 14px; margin: 0 0 12px; color: var(--text); font-weight: 700; }
.chart-empty { color: var(--text-dim); font-size: 12.5px; padding: 20px 0; text-align: center; }
.weak-list { display: flex; flex-direction: column; gap: 8px; }
.weak-row { display: flex; justify-content: space-between; align-items: center; font-size: 12.5px; padding: 8px 10px; background: var(--glass-bg-strong); border-radius: var(--radius-sm); }
.weak-row .acc { font-family: var(--mono); font-weight: 700; }
.weak-row .acc.low { color: var(--red); }
.weak-row .acc.mid { color: var(--gold); }

/* ---- toast ---- */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%) translateY(20px);
  background: var(--glass-bg-strong); backdrop-filter: blur(20px); border: 1px solid var(--glass-border);
  padding: 12px 20px; border-radius: 999px; font-size: 13px; color: var(--text);
  opacity: 0; pointer-events: none; transition: opacity 0.25s, transform 0.25s; z-index: 50;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }

/* confetti burst (correct answer) */
.confetti-piece {
  position: fixed; top: 40%; left: 50%; width: 8px; height: 8px; border-radius: 2px;
  pointer-events: none; z-index: 60; opacity: 0.9;
  animation: confettiFall 0.9s ease-out forwards;
}
@keyframes confettiFall {
  0% { transform: translate(0,0) rotate(0deg); opacity: 1; }
  100% { transform: translate(var(--dx), var(--dy)) rotate(var(--rot)); opacity: 0; }
}

/* ================= MOBILE / iPHONE ================= */
@media (max-width: 860px) {
  .stat-cards, .sections-grid, .analytics-grid, .result-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 720px) {
  html, body { font-size: 15px; }

  .app {
    display: block;
    padding: 0;
    gap: 0;
    min-height: 100vh;
  }

  /* .sidebar itself stops rendering as a box — its children (crest, nav,
     sidebar-footer) lay out directly as children of .app instead, so we can
     pin the nav to the bottom and the crest/controls to the top independently. */
  .sidebar {
    display: contents;
  }

  /* ---- top bar: crest + theme toggle + exam date, all in one compact row ---- */
  .crest {
    position: sticky;
    top: 0;
    z-index: 30;
    margin: 0;
    padding: calc(env(safe-area-inset-top) + 10px) 16px 10px;
    background: var(--bg);
    border-bottom: 1px solid var(--glass-border);
  }
  .crest-badge { width: 34px; height: 34px; border-radius: 10px; }

  .sidebar-footer {
    position: sticky;
    top: calc(env(safe-area-inset-top) + 54px);
    z-index: 29;
    display: flex;
    align-items: center;
    gap: 10px;
    border-top: none;
    padding: 8px 16px 10px;
    background: var(--bg);
    border-bottom: 1px solid var(--glass-border);
  }
  .theme-toggle { margin-bottom: 0; }
  .theme-btn { width: 38px; padding: 8px 0; }
  .exam-date-label { display: none; } /* implied by the date field itself on a narrow row */
  #examDateInput { width: auto; flex: 1; margin-bottom: 0; min-width: 0; }
  .countdown { white-space: nowrap; flex-shrink: 0; }

  /* ---- bottom tab bar ---- */
  .nav {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 40;
    flex-direction: row;
    gap: 0;
    background: var(--glass-bg-strong);
    backdrop-filter: blur(24px) saturate(160%);
    -webkit-backdrop-filter: blur(24px) saturate(160%);
    border-top: 1px solid var(--glass-border);
    padding: 6px 4px calc(6px + env(safe-area-inset-bottom));
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
  }
  .nav-item {
    flex: 1 0 auto;
    min-width: 58px;
    flex-direction: column;
    gap: 3px;
    align-items: center;
    padding: 7px 4px;
    font-size: 9.5px;
    text-align: center;
    white-space: nowrap;
    border-radius: var(--radius-sm);
  }
  .nav-item .dot { width: 5px; height: 5px; }

  /* ---- main content: room for the sticky top bar + fixed bottom bar ---- */
  .main {
    max-width: 100%;
    padding: 16px 16px calc(78px + env(safe-area-inset-bottom));
  }
  .view-header h1 { font-size: 22px; }

  .stat-cards { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 14px; }
  .stat-card .num { font-size: 22px; }

  .sections-grid, .analytics-grid { grid-template-columns: 1fr; }
  .result-grid { grid-template-columns: repeat(3, 1fr); }

  .practice-picker { padding: 10px 12px; gap: 6px; }
  .start-btn { width: 100%; margin-left: 0; margin-top: 6px; text-align: center; }
  .q-card { padding: 20px; max-width: 100%; }
  .q-text { font-size: 17px; }
  .q-opt { padding: 13px 14px; min-height: 44px; } /* Apple HIG minimum tap target */
  .q-footer { gap: 8px; }
  .q-footer button { flex: 1 1 auto; text-align: center; }

  .form-row { grid-template-columns: 1fr; }
  .add-panel { max-width: 100%; padding: 18px; }

  /* manage rows: stack into readable cards instead of a cramped 6-column grid */
  .manage-row {
    grid-template-columns: none;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    row-gap: 8px;
  }
  .manage-row .qtext {
    flex: 1 1 100%;
    white-space: normal;
    overflow: visible;
    text-overflow: unset;
    order: -1;
    font-size: 13.5px;
  }

  .exam-header { top: 0; flex-wrap: wrap; }
  .bubble { width: 24px; height: 24px; }

  .orb-1, .orb-2, .orb-3, .orb-4 { width: 260px; height: 260px; filter: blur(60px); }
}

@media (max-width: 420px) {
  .stat-cards { grid-template-columns: 1fr 1fr; }
  .result-grid { grid-template-columns: 1fr; }
  .nav-item { font-size: 9px; min-width: 50px; }
}