@import url("https://fonts.googleapis.com/css2?family=Press+Start+2P&family=VT323&display=swap");

:root {
  --bg: #0a0618;
  --bg-elevated: #140c2e;
  --bg-card: #1a1040;
  --border: #4a2f8f;
  --text: #f1eefc;
  --text-dim: #a996d6;
  --accent: #00f6ff;
  --accent-strong: #00c6d6;
  --accent-contrast: #001018;
  --danger: #ff3864;
  --warn: #ffd23f;
  --good: #39ff6a;
  --magenta: #ff2fb0;
  --purple: #b14bff;
  --orange: #ff8a2b;
  --radius: 4px;
  --shadow: 5px 5px 0 rgba(0,0,0,0.55);
  --font-display: "Press Start 2P", "Courier New", monospace;
  --font-body: "VT323", "Courier New", monospace;
  color-scheme: dark;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size: 20px;
  -webkit-tap-highlight-color: transparent;
}

body {
  background-image:
    radial-gradient(ellipse at top, rgba(177, 75, 255, 0.18), transparent 60%),
    repeating-linear-gradient(0deg, rgba(74,47,143,0.35) 0px, rgba(74,47,143,0.35) 1px, transparent 1px, transparent 32px),
    repeating-linear-gradient(90deg, rgba(74,47,143,0.35) 0px, rgba(74,47,143,0.35) 1px, transparent 1px, transparent 32px);
  background-attachment: fixed;
  position: relative;
}

/* CRT scanline overlay */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  z-index: 999;
  pointer-events: none;
  background: repeating-linear-gradient(
    to bottom,
    rgba(0,0,0,0) 0px,
    rgba(0,0,0,0) 2px,
    rgba(0,0,0,0.12) 3px
  );
  mix-blend-mode: multiply;
}

#app {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  position: relative;
  z-index: 1;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  border-bottom: 3px solid var(--purple);
  background: var(--bg-elevated);
  position: sticky;
  top: 0;
  z-index: 10;
  box-shadow: 0 2px 0 rgba(0,0,0,0.5);
  flex-wrap: wrap;
  gap: 10px;
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-display);
  font-size: 0.95rem;
  color: var(--accent);
  text-shadow: 2px 2px 0 var(--magenta), 4px 4px 0 rgba(0,0,0,0.6);
  letter-spacing: 0.02em;
}
.brand-icon { font-size: 1.4rem; filter: drop-shadow(0 0 6px var(--accent)); }

.ghost-btn {
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text-dim);
  padding: 8px 12px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-size: 0.6rem;
  letter-spacing: 0.02em;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.5);
  transition: transform 0.08s ease;
}
.ghost-btn:hover { border-color: var(--accent); color: var(--accent); }
.ghost-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 rgba(0,0,0,0.5); }

.profile-badge {
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--good);
  text-shadow: 0 0 6px var(--good);
  white-space: nowrap;
}

.profile-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 20px;
}
.profile-row {
  display: flex;
  gap: 8px;
  align-items: stretch;
}
.profile-select-btn {
  flex: 1;
  text-align: left;
  background: var(--bg-card);
  color: var(--text);
}
.profile-select-btn:hover { background: var(--bg-elevated); border-color: var(--accent); color: var(--accent); }
.profile-delete-btn {
  flex: none;
  font-size: 0.9rem;
}
.profile-delete-btn:hover { border-color: var(--danger); color: var(--danger); }

.view-root {
  flex: 1;
  width: 100%;
  max-width: 980px;
  margin: 0 auto;
  padding: 20px 16px 60px;
}

.footer {
  text-align: center;
  padding: 16px;
  color: var(--text-dim);
  font-family: var(--font-display);
  font-size: 0.55rem;
  letter-spacing: 0.04em;
  border-top: 3px solid var(--purple);
  background: var(--bg-elevated);
}

/* ---------- Hub ---------- */
.hub-intro {
  margin-bottom: 20px;
}
.hub-intro h1 {
  font-family: var(--font-display);
  font-size: 1.5rem;
  margin: 0 0 14px;
  color: var(--accent);
  text-shadow: 3px 3px 0 var(--magenta), 6px 6px 0 rgba(0,0,0,0.6);
  letter-spacing: 0.02em;
  line-height: 1.5;
}
.hub-intro p {
  color: var(--text-dim);
  margin: 0;
  font-size: 1.15rem;
}

.overall-progress {
  margin: 16px 0 24px;
  background: var(--bg-card);
  border: 3px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 16px;
  box-shadow: var(--shadow);
}
.overall-progress .label {
  display: flex;
  justify-content: space-between;
  font-family: var(--font-display);
  font-size: 0.6rem;
  color: var(--text-dim);
  margin-bottom: 10px;
}

.progress-bar {
  height: 16px;
  border-radius: 0;
  background: #0d0620;
  border: 2px solid var(--border);
  overflow: hidden;
  padding: 2px;
}
.progress-bar-fill {
  height: 100%;
  background: repeating-linear-gradient(
    90deg,
    var(--good) 0px, var(--good) 10px,
    #1fcc52 10px, #1fcc52 12px
  );
  transition: width 0.3s steps(10);
  box-shadow: 0 0 8px var(--good);
}

.topic-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 16px;
}

.topic-card {
  background: var(--bg-card);
  border: 3px solid var(--card-color, var(--border));
  border-radius: var(--radius);
  padding: 16px;
  cursor: pointer;
  box-shadow: 5px 5px 0 rgba(0,0,0,0.55), 0 0 14px -4px var(--card-color, transparent);
  transition: transform 0.1s ease, box-shadow 0.1s ease;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.topic-card:hover, .topic-card:focus-visible {
  transform: translate(-2px, -2px);
  box-shadow: 7px 7px 0 rgba(0,0,0,0.55), 0 0 20px -2px var(--card-color, var(--accent));
  outline: none;
}
.topic-card:nth-of-type(6n+1) { --card-color: var(--accent); }
.topic-card:nth-of-type(6n+2) { --card-color: var(--magenta); }
.topic-card:nth-of-type(6n+3) { --card-color: var(--warn); }
.topic-card:nth-of-type(6n+4) { --card-color: var(--good); }
.topic-card:nth-of-type(6n+5) { --card-color: var(--purple); }
.topic-card:nth-of-type(6n+6) { --card-color: var(--orange); }

.topic-card .topic-head {
  display: flex;
  align-items: center;
  gap: 10px;
}
.topic-card .topic-icon { font-size: 1.7rem; filter: drop-shadow(0 0 6px var(--card-color, var(--accent))); }
.topic-card h3 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 0.72rem;
  color: var(--card-color, var(--accent));
  line-height: 1.5;
}
.topic-card p {
  margin: 0;
  color: var(--text-dim);
  font-size: 1.05rem;
  line-height: 1.3;
  flex: 1;
}
.topic-card .topic-meta {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-family: var(--font-display);
  font-size: 0.55rem;
  color: var(--text-dim);
}

/* ---------- Topic module view ---------- */
.module-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  flex-wrap: wrap;
}
.back-btn {
  background: var(--bg-card);
  border: 2px solid var(--border);
  color: var(--text);
  padding: 8px 12px;
  border-radius: var(--radius);
  cursor: pointer;
  font-family: var(--font-display);
  font-size: 0.55rem;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.5);
  transition: transform 0.08s ease;
}
.back-btn:hover { border-color: var(--accent); color: var(--accent); }
.back-btn:active { transform: translate(2px, 2px); box-shadow: 1px 1px 0 rgba(0,0,0,0.5); }
.module-header h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1rem;
  color: var(--accent);
  text-shadow: 2px 2px 0 rgba(0,0,0,0.6);
  line-height: 1.5;
}

.block-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
}
.block-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--bg-card);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 12px 14px;
  cursor: pointer;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.45);
  transition: transform 0.08s ease;
}
.block-row:hover { border-color: var(--accent); transform: translate(-1px, -1px); }
.block-row .block-title { font-weight: 600; font-size: 1.05rem; }
.block-row .block-type {
  font-family: var(--font-display);
  font-size: 0.55rem;
  color: var(--magenta);
  letter-spacing: 0.02em;
}
.block-row .block-status {
  font-size: 0.95rem;
  color: var(--text-dim);
}
.block-row .block-status.done { color: var(--good); text-shadow: 0 0 6px var(--good); }
.block-row .block-status.streak { color: var(--warn); }
.block-row .block-status.retry { color: var(--text-dim); }

/* ---------- Game mode shared ---------- */
.mode-shell {
  background: var(--bg-card);
  border: 3px solid var(--border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: var(--shadow);
}
.mode-shell h3 {
  margin-top: 0;
  font-family: var(--font-display);
  font-size: 0.85rem;
  color: var(--accent);
  line-height: 1.6;
}

.notes-shell h3 {
  color: var(--magenta);
  font-family: var(--font-display);
  font-size: 0.75rem;
  margin: 26px 0 10px;
  line-height: 1.6;
}
.notes-shell h3:first-child { margin-top: 0; }
.notes-shell p {
  line-height: 1.5;
  color: var(--text);
  font-size: 1.15rem;
  margin: 0 0 4px;
}
.mode-progress {
  font-family: var(--font-display);
  font-size: 0.55rem;
  color: var(--text-dim);
  margin-bottom: 16px;
  line-height: 1.6;
}

.btn {
  background: var(--accent);
  color: var(--accent-contrast);
  border: 2px solid rgba(0,0,0,0.4);
  padding: 12px 18px;
  border-radius: var(--radius);
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 0.65rem;
  cursor: pointer;
  box-shadow: 4px 4px 0 rgba(0,0,0,0.5);
  transition: transform 0.08s ease, box-shadow 0.08s ease;
}
.btn:hover { filter: brightness(1.1); }
.btn:active { transform: translate(3px, 3px); box-shadow: 1px 1px 0 rgba(0,0,0,0.5); }
.btn:disabled { opacity: 0.35; cursor: not-allowed; transform: none; }
.btn.secondary {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  color: var(--text);
}

/* Quiz */
.quiz-question { font-size: 1.3rem; margin-bottom: 16px; line-height: 1.3; }
.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 16px;
}
.quiz-option {
  text-align: left;
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  color: var(--text);
  padding: 12px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  font-size: 1.1rem;
  box-shadow: 3px 3px 0 rgba(0,0,0,0.4);
  transition: transform 0.08s ease;
}
.quiz-option:hover { border-color: var(--accent); transform: translate(-1px, -1px); }
.quiz-option.correct { border-color: var(--good); background: rgba(57,255,106,0.12); box-shadow: 0 0 10px -2px var(--good); }
.quiz-option.incorrect { border-color: var(--danger); background: rgba(255,56,100,0.14); }
.quiz-option.disabled { pointer-events: none; }
.quiz-explain {
  background: var(--bg-elevated);
  border-left: 4px solid var(--warn);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: 1.05rem;
  color: var(--text-dim);
  margin-bottom: 16px;
}

/* Ordering */
.order-list { display: flex; flex-direction: column; gap: 8px; margin-bottom: 16px; }
.order-item {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  gap: 10px;
  cursor: grab;
  user-select: none;
}
.order-item.dragging { opacity: 0.5; }
.order-item .handle { color: var(--text-dim); font-size: 1rem; }
.order-item.correct-pos { border-color: var(--good); box-shadow: 0 0 8px -2px var(--good); }
.order-item.wrong-pos { border-color: var(--danger); }
.order-item .idx {
  min-width: 24px;
  height: 24px;
  border-radius: 0;
  background: var(--magenta);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.6rem;
}

/* Matching */
.match-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-bottom: 16px;
}
.match-col { display: flex; flex-direction: column; gap: 8px; }
.match-chip {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 12px;
  cursor: pointer;
  font-size: 1.05rem;
  text-align: left;
  box-shadow: 2px 2px 0 rgba(0,0,0,0.4);
}
.match-chip.selected { border-color: var(--accent); background: rgba(0,246,255,0.1); }
.match-chip.matched { border-color: var(--good); opacity: 0.55; pointer-events: none; }
.match-chip.wrong { border-color: var(--danger); animation: shake 0.3s; }
@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-4px); }
  75% { transform: translateX(4px); }
}

/* Scheduler sim */
.sched-jobs-table {
  width: 100%;
  border-collapse: collapse;
  margin-bottom: 16px;
  font-size: 1.05rem;
}
.sched-jobs-table th, .sched-jobs-table td {
  border: 2px solid var(--border);
  padding: 6px 10px;
  text-align: center;
}
.sched-jobs-table th { background: var(--bg-elevated); font-family: var(--font-display); font-size: 0.55rem; color: var(--accent); }
.gantt-row { display: flex; margin-bottom: 4px; border-radius: 0; overflow: hidden; border: 2px solid var(--border); }
.gantt-block {
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.6rem;
  border-right: 2px solid var(--bg);
  color: #000814;
}
.gantt-idle { background: var(--border) !important; color: var(--text-dim) !important; }
.gantt-axis { display: flex; font-size: 0.85rem; color: var(--text-dim); margin-bottom: 14px; }
.gantt-axis span { flex: none; text-align: left; }

.sched-controls { display: flex; flex-wrap: wrap; gap: 10px; margin-bottom: 16px; }
.sched-controls select, .sched-controls input {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  color: var(--text);
  padding: 8px 10px;
  border-radius: var(--radius);
  font-size: 1rem;
}

/* Race / interleaving sim */
.race-threads { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 16px; }
.race-thread h4 { margin: 0 0 8px; font-family: var(--font-display); font-size: 0.6rem; color: var(--magenta); line-height: 1.5; }
.race-line {
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.82rem;
  padding: 4px 8px;
  border-radius: var(--radius);
  margin-bottom: 4px;
  background: var(--bg-elevated);
  border: 1px solid transparent;
}
.race-line.active { border-color: var(--accent); background: rgba(0,246,255,0.1); box-shadow: 0 0 8px -3px var(--accent); }
.race-line.done { opacity: 0.4; }
.race-state {
  background: var(--bg-elevated);
  border: 2px solid var(--border);
  border-radius: var(--radius);
  padding: 12px;
  margin-bottom: 16px;
  font-family: "SF Mono", Consolas, monospace;
  font-size: 0.95rem;
  color: var(--good);
}

.result-banner {
  padding: 14px 16px;
  border-radius: var(--radius);
  margin-bottom: 16px;
  font-family: var(--font-display);
  font-size: 0.7rem;
  line-height: 1.6;
  border: 2px solid;
  box-shadow: var(--shadow);
}
.result-banner.success { background: rgba(57,255,106,0.12); color: var(--good); border-color: var(--good); text-shadow: 0 0 8px var(--good); }
.result-banner.fail { background: rgba(255,56,100,0.12); color: var(--danger); border-color: var(--danger); }
.result-banner.streak { background: rgba(255,210,63,0.12); color: var(--warn); border-color: var(--warn); }

.flex-row { display: flex; gap: 10px; flex-wrap: wrap; }

/* ---------- Readings view ---------- */
.readings-card {
  background: var(--bg-card);
  border: 3px solid var(--border);
  border-radius: var(--radius);
  padding: 16px 18px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
}
.readings-card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}
.readings-card-head h3 {
  margin: 0;
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-size: 0.75rem;
  color: var(--accent);
  line-height: 1.6;
}
.mastery-badge {
  font-family: var(--font-display);
  font-size: 0.55rem;
  padding: 6px 10px;
  border-radius: var(--radius);
  white-space: nowrap;
  border: 2px solid;
}
.mastery-badge.neutral { background: var(--bg-elevated); color: var(--text-dim); border-color: var(--border); }
.mastery-badge.bad { background: rgba(255,56,100,0.15); color: var(--danger); border-color: var(--danger); }
.mastery-badge.warn { background: rgba(255,210,63,0.15); color: var(--warn); border-color: var(--warn); }
.mastery-badge.good { background: rgba(57,255,106,0.12); color: var(--good); border-color: var(--good); }

.reading-list {
  list-style: none;
  margin: 10px 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.reading-item {
  display: flex;
  align-items: baseline;
  gap: 8px;
  font-size: 1.05rem;
}
.reading-item input[type="checkbox"] {
  margin-top: 3px;
  accent-color: var(--accent);
  width: 16px;
  height: 16px;
}
.reading-item .reading-file {
  color: var(--text-dim);
  font-size: 0.82rem;
  font-family: "SF Mono", Consolas, monospace;
}
.reading-item.read label { text-decoration: line-through; color: var(--text-dim); }
.reading-item.missing {
  color: var(--text-dim);
  font-style: italic;
  opacity: 0.85;
  display: flex;
  gap: 8px;
}
.reading-kind-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.5rem;
  color: var(--bg);
  background: var(--accent);
  border-radius: 3px;
  padding: 2px 6px;
  margin-right: 2px;
  white-space: nowrap;
}

.suggestions-box {
  background: var(--bg-elevated);
  border-left: 4px solid var(--warn);
  border-radius: var(--radius);
  padding: 10px 12px;
  margin-top: 10px;
}
.suggestions-box.ok { border-left-color: var(--good); }
.suggestions-box h4 {
  margin: 0 0 8px;
  font-family: var(--font-display);
  font-size: 0.55rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
  line-height: 1.6;
}
.suggestion-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: none;
  color: var(--text);
  padding: 5px 0;
  cursor: pointer;
  font-size: 1.05rem;
}
.suggestion-item:hover { color: var(--accent); }

@media (max-width: 560px) {
  html, body { font-size: 18px; }
  .match-grid { grid-template-columns: 1fr; }
  .race-threads { grid-template-columns: 1fr; }
  .topic-grid { grid-template-columns: 1fr; }
  .hub-intro h1 { font-size: 1.1rem; }
  .module-header h2 { font-size: 0.8rem; }
}