/* ═══════════════════════════════════════════════════════════
   pages.css  —  Shared styles for index, math, reading,
                 and game pages. Matches quiz/lesson palette.
   ═══════════════════════════════════════════════════════════ */

/* ─── Tokens ────────────────────────────────────────────── */
:root {
  --pg-primary:    #42a642;
  --pg-primary-lt: #eaf6ea;
  --pg-primary-dk: #2d7a2d;
  --pg-border:     #d8edd8;
  --pg-shadow:     0 4px 24px rgba(60,120,60,0.09);
  --pg-shadow-lg:  0 8px 40px rgba(60,120,60,0.13);
  --pg-text:       #1a2e1a;
  --pg-muted:      #6a826a;
  --pg-card:       #ffffff;
  --pg-radius:     18px;
  --pg-radius-sm:  12px;

  /* Math category colours */
  --pg-add:  #42a642;   /* green  */
  --pg-sub:  #5b7cf6;   /* blue   */
  --pg-mul:  #d97706;   /* amber  */
  --pg-div:  #f43f5e;   /* red    */

  --pg-font-head: 'Lexend', sans-serif;
  --pg-font-body: 'Lexend', sans-serif;
  --pg-ease-spring: cubic-bezier(0.34,1.56,0.64,1);
  --pg-ease-out:    cubic-bezier(0.22,1,0.36,1);
}

/* ─── Page wrapper (hero + content) ────────────────────── */
.pg-page {
  font-family: var(--pg-font-body);
  color: var(--pg-text);
  margin-left:  calc(-1 * var(--bs-gutter-x, 12px));
  margin-right: calc(-1 * var(--bs-gutter-x, 12px));
  padding: 0 0 64px;
}

/* ─── Hero band ─────────────────────────────────────────── */
.pg-hero {
  background: var(--pg-primary-lt);
  border-bottom: 2px solid var(--pg-border);
  padding: 36px 24px 32px;
}

.pg-hero-inner { max-width: 860px; margin: 0 auto; }

.pg-eyebrow {
  font-family: var(--pg-font-head);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--pg-primary);
  margin: 0 0 8px;
}

.pg-title {
  font-family: var(--pg-font-head);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 600;
  letter-spacing: -0.03em;
  color: var(--pg-text);
  margin: 0 0 6px;
  line-height: 1.12;
}

.pg-subtitle {
  font-size: 0.95rem;
  color: var(--pg-muted);
  margin: 0;
  line-height: 1.6;
}

/* ─── Content area ──────────────────────────────────────── */
.pg-content {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 24px 0;
}

/* ─── Grid ──────────────────────────────────────────────── */
.pg-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 18px;
}

/* ─── Generic card ──────────────────────────────────────── */
.pg-card {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: box-shadow 0.2s, transform 0.2s var(--pg-ease-spring);
  animation: pgCardIn 0.4s var(--pg-ease-out) both;
}

.pg-card:hover { box-shadow: var(--pg-shadow-lg); transform: translateY(-2px); }

.pg-card:nth-child(1) { animation-delay: 0.04s; }
.pg-card:nth-child(2) { animation-delay: 0.08s; }
.pg-card:nth-child(3) { animation-delay: 0.12s; }
.pg-card:nth-child(4) { animation-delay: 0.16s; }

@keyframes pgCardIn {
  from { opacity: 0; transform: translateY(12px); }
  to   { opacity: 1; transform: translateY(0); }
}

.pg-card-strip {
  height: 5px;
  background: var(--pg-primary);
}

.pg-card-body {
  padding: 22px 22px 18px;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.pg-card-title {
  font-family: var(--pg-font-head);
  font-size: 1.1rem;
  font-weight: 600;
  letter-spacing: -0.01em;
  color: var(--pg-text);
  margin: 0;
}

.pg-card-desc {
  font-size: 0.88rem;
  color: var(--pg-muted);
  line-height: 1.6;
  margin: 0;
  flex: 1;
}

.pg-card-footer {
  padding: 14px 22px 18px;
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  border-top: 1.5px solid var(--pg-border);
}

/* ─── Colour-coded strips for math categories ───────────── */
.pg-card--add  .pg-card-strip { background: var(--pg-add); }
.pg-card--sub  .pg-card-strip { background: var(--pg-sub); }
.pg-card--mul  .pg-card-strip { background: var(--pg-mul); }
.pg-card--div  .pg-card-strip { background: var(--pg-div); }
.pg-card--read .pg-card-strip { background: var(--pg-primary); }

/* ─── Action buttons ────────────────────────────────────── */
.pg-btn {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  border-radius: 99px;
  padding: 8px 18px;
  font-family: var(--pg-font-head);
  font-size: 0.82rem;
  font-weight: 600;
  text-decoration: none !important;
  cursor: pointer;
  border: none;
  transition: transform 0.2s var(--pg-ease-spring), box-shadow 0.18s, background 0.18s, opacity 0.18s;
  white-space: nowrap;
}

.pg-btn--primary {
  background: var(--pg-primary);
  color: #fff !important;
  box-shadow: 0 4px 12px rgba(66,166,66,0.28);
}
.pg-btn--primary:hover {
  background: var(--pg-primary-dk);
  transform: scale(1.05);
  box-shadow: 0 6px 18px rgba(66,166,66,0.38);
}

.pg-btn--blue { background: #5b7cf6; color:#fff !important; box-shadow:0 4px 12px rgba(91,124,246,0.28); }
.pg-btn--blue:hover { background:#3d5bd9; transform:scale(1.05); }

.pg-btn--amber { background: #d97706; color:#fff !important; box-shadow:0 4px 12px rgba(217,119,6,0.28); }
.pg-btn--amber:hover { background:#b45309; transform:scale(1.05); }

.pg-btn--red { background: #f43f5e; color:#fff !important; box-shadow:0 4px 12px rgba(244,63,94,0.28); }
.pg-btn--red:hover { background:#e11d48; transform:scale(1.05); }

.pg-btn--ghost {
  background: #fff;
  color: var(--pg-primary-dk) !important;
  border: 2px solid var(--pg-border);
}
.pg-btn--ghost:hover {
  border-color: var(--pg-primary);
  background: var(--pg-primary-lt);
  transform: scale(1.05);
}

.pg-btn--lg {
  padding: 13px 30px;
  font-size: 1rem;
}

.pg-btn:disabled, .pg-btn.disabled {
  opacity: 0.5;
  pointer-events: none;
}

/* ─── Star display ──────────────────────────────────────── */
.pg-stars {
  display: flex;
  justify-content: center;
  gap: 4px;
  font-size: 1.8rem;
  margin-bottom: 8px;
}

/* ─── Game chrome (start, timer, end, questions) ─────────── */
.pg-game-wrap {
  max-width: 860px;
  margin: 0 auto;
  padding: 32px 24px 0;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* Instructions / start card */
.pg-instructions {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow);
  padding: 28px 32px 28px;
}

.pg-instructions h4 {
  font-family: var(--pg-font-head);
  font-size: 1rem;
  font-weight: 600;
  color: var(--pg-text);
  margin: 0 0 12px;
  letter-spacing: -0.01em;
}

.pg-instructions ul {
  padding-left: 18px;
  margin: 0 0 20px;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.pg-instructions li {
  font-size: 0.9rem;
  color: var(--pg-muted);
  line-height: 1.5;
}

.pg-instructions li ul { margin: 6px 0 0; }

/* Timer pill */
.pg-timer {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: #fef3c7;
  border: 2px solid #fde68a;
  border-radius: 99px;
  padding: 10px 24px;
  font-family: var(--pg-font-head);
  font-size: 1.3rem;
  font-weight: 600;
  color: #92400e;
  align-self: flex-start;
}

/* Results card */
.pg-results {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow-lg);
  padding: 32px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
  animation: pgCardIn 0.4s var(--pg-ease-spring) both;
}

.pg-results-stats {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  justify-content: center;
}

.pg-stat {
  background: #f8faff;
  border: 2px solid var(--pg-border);
  border-radius: var(--pg-radius-sm);
  padding: 14px 22px;
  min-width: 100px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 3px;
}

.pg-stat-val {
  font-family: var(--pg-font-head);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--pg-text);
  letter-spacing: -0.02em;
}

.pg-stat-lbl {
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--pg-muted);
  text-transform: uppercase;
  letter-spacing: 0.07em;
}

/* Question grid (all-at-once mode) */
.pg-q-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
  gap: 12px;
}

/* Individual question card */
.pg-q-card {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius-sm);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--pg-font-head);
  font-size: 1rem;
  font-weight: 600;
}

.pg-q-card input[type="number"] {
  border: 2px solid var(--pg-border);
  border-radius: 8px;
  padding: 6px 10px;
  font-family: var(--pg-font-head);
  font-size: 1rem;
  font-weight: 600;
  width: 80px;
  text-align: center;
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
  -moz-appearance: textfield;
}

.pg-q-card input[type="number"]::-webkit-outer-spin-button,
.pg-q-card input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

.pg-q-card input[type="number"]:focus {
  border-color: var(--pg-primary);
  box-shadow: 0 0 0 3px rgba(66,166,66,0.15);
}

.pg-q-card input[type="number"]:disabled {
  background: #f0f0f0;
  color: var(--pg-muted);
}

.pg-q-answer { font-size: 1.2rem; min-width: 28px; }

/* One-by-one question card */
.pg-q-single {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow);
  padding: 28px 32px;
  display: flex;
  align-items: center;
  gap: 16px;
  font-family: var(--pg-font-head);
  font-size: 1.4rem;
  font-weight: 600;
  animation: pgCardIn 0.3s var(--pg-ease-spring) both;
}

.pg-q-num {
  background: var(--pg-primary-lt);
  border: 1.5px solid var(--pg-border);
  border-radius: 8px;
  padding: 4px 12px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--pg-muted);
  white-space: nowrap;
}

.pg-q-single input[type="number"] {
  border: 2px solid var(--pg-border);
  border-radius: 10px;
  padding: 10px 14px;
  font-family: var(--pg-font-head);
  font-size: 1.3rem;
  font-weight: 600;
  width: 120px;
  text-align: center;
  outline: none;
  transition: border-color 0.18s, box-shadow 0.18s;
  -moz-appearance: textfield;
}

.pg-q-single input[type="number"]::-webkit-outer-spin-button,
.pg-q-single input[type="number"]::-webkit-inner-spin-button { -webkit-appearance: none; }

.pg-q-single input[type="number"]:focus {
  border-color: var(--pg-primary);
  box-shadow: 0 0 0 3px rgba(66,166,66,0.15);
}

.pg-q-single input[type="number"]:disabled { background: #f0f0f0; }

/* Reading answer buttons (onebyoneread) */
.pg-read-answer-btn {
  width: 100%;
  padding: 14px 18px;
  border-radius: var(--pg-radius-sm);
  font-family: var(--pg-font-head);
  font-size: 1.1rem;
  font-weight: 600;
  border: 2px solid var(--pg-border);
  background: #f8faff;
  color: var(--pg-text);
  cursor: pointer;
  transition: background 0.15s, border-color 0.15s, transform 0.2s var(--pg-ease-spring);
  text-align: left;
  display: flex;
  align-items: center;
  gap: 12px;
}

.pg-read-answer-btn:hover:not(:disabled) {
  border-color: var(--pg-primary);
  background: var(--pg-primary-lt);
  transform: translateX(4px);
}

.pg-read-answer-btn:disabled { cursor: default; }

.ra-text { flex: 1; }

.ra-icon {
  flex-shrink: 0;
  font-size: 1.1rem;
  font-weight: 600;
  min-width: 20px;
  text-align: center;
  opacity: 0;
  transform: scale(0.5);
  transition: opacity 0.2s, transform 0.3s var(--pg-ease-spring);
}

/* Correct answer */
.pg-read-answer-btn.ra-correct {
  border-color: #16a34a;
  background: #dcfce7;
  color: #15803d;
}
.pg-read-answer-btn.ra-correct .ra-icon { opacity: 1; transform: scale(1); color: #15803d; }

/* Wrong answer */
.pg-read-answer-btn.ra-wrong {
  border-color: #f43f5e;
  background: #ffe4e8;
  color: #be123c;
  animation: pgShake 0.35s var(--pg-ease-out);
}
.pg-read-answer-btn.ra-wrong .ra-icon { opacity: 1; transform: scale(1); color: #be123c; }

/* Bootstrap class overrides (kept for backwards compat) */
.pg-read-answer-btn.btn-success { background: #dcfce7 !important; border-color: #22c55e !important; color: #15803d !important; }
.pg-read-answer-btn.btn-danger  { background: #ffe4e8 !important; border-color: #f43f5e !important; color: #be123c !important; }
.pg-read-answer-btn.btn-primary { background: #f8faff; border-color: var(--pg-border); color: var(--pg-text); }

@keyframes pgShake {
  0%,100% { transform: translateX(0); }
  20%     { transform: translateX(-5px); }
  40%     { transform: translateX(5px); }
  60%     { transform: translateX(-4px); }
  80%     { transform: translateX(3px); }
}

/* Action row at bottom of question cards */
.pg-q-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  padding: 16px 32px 20px;
  border-top: 1.5px solid var(--pg-border);
}

/* Star ranking legend */
.pg-star-table {
  background: var(--pg-card);
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius);
  box-shadow: var(--pg-shadow);
  padding: 24px 28px;
  margin-top: 8px;
}

.pg-star-table h4 {
  font-family: var(--pg-font-head);
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--pg-text);
  margin: 0 0 14px;
  letter-spacing: -0.01em;
}

.pg-star-row {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 7px 0;
  border-bottom: 1px solid var(--pg-border);
  font-size: 0.85rem;
  color: var(--pg-muted);
}

.pg-star-row:last-child { border-bottom: none; }
.pg-star-icons { white-space: nowrap; min-width: 110px; font-size: 1rem; }

/* Answer review row (onebyoneread) */
.pg-review-row {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 14px;
  background: #f8faff;
  border: 1.5px solid var(--pg-border);
  border-radius: var(--pg-radius-sm);
  font-family: var(--pg-font-head);
  font-size: 0.9rem;
  font-weight: 600;
  flex-wrap: wrap;
}

/* ─── Responsive ────────────────────────────────────────── */
@media (max-width: 560px) {
  .pg-hero { padding: 24px 18px 20px; }
  .pg-content, .pg-game-wrap { padding: 20px 16px 0; }
  .pg-instructions { padding: 22px 20px; }
  .pg-q-single { padding: 20px 20px; font-size: 1.2rem; }
  .pg-q-grid { grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); }
}