/* ============================================================
   maths-y7-theme.css — Junior Mathematics Year 7 (all units)
   Palette: Warm indigo / blue — foundational, friendly
   ============================================================ */

:root {
  --primary:       #2563eb;
  --primary-mid:   #1d4ed8;
  --primary-light: #dbeafe;
  --accent:        #4f46e5;
  --accent-dark:   #4338ca;
  --accent-light:  #e0e7ff;
  --mint:          #ecfdf5;
  --mint-border:   #6ee7b7;
  --sky:           #e0f2fe;
  --sky-border:    #7dd3fc;
  --peach:         #fffbeb;
  --peach-border:  #fcd34d;
  --coral:         #e11d48;
  --coral-light:   #ffe4e6;
  --warning:       #d97706;
  --warning-light: #fffbeb;
  --bg:            #f5f7fb;
  --surface:       #ffffff;
  --text:          #16212f;
  --text-muted:    #475569;
  --text-light:    #64748b;
  --border:        #dde3ee;
  --radius:        16px;
  --radius-sm:     12px;
}

/* ── Page wrapper ───────────────────────────── */
.page { max-width: 900px; margin: 0 auto; padding: 0 24px 60px; }

/* ── Progress bar ───────────────────────────── */
.progress-bar-wrap { position: fixed; top: 0; left: 0; right: 0; height: 3px; background: rgba(0,0,0,0.08); z-index: 1000; }
.progress-bar-fill { height: 100%; background: linear-gradient(90deg, var(--primary), var(--accent)); width: 0; transition: width .2s; }

/* ── Section nav dots ───────────────────────── */
.section-nav { position: fixed; right: 14px; top: 50%; transform: translateY(-50%); display: flex; flex-direction: column; gap: 8px; z-index: 999; }
.section-nav a { width: 9px; height: 9px; border-radius: 50%; background: var(--border); transition: all .2s; display: block; }
.section-nav a.active { background: var(--primary); transform: scale(1.4); }
@media (max-width: 900px) { .section-nav { display: none; } }

/* ── Phase strip (override for consistency) ──── */
.phase-strip { display: flex; align-items: center; justify-content: center; gap: 10px; margin: 4px 0 22px; flex-wrap: wrap; }
.phase-btn { padding: 8px 20px; border-radius: 999px; border: 1px solid var(--border); background: #fff; font-size: 13px; font-weight: 600; color: var(--text-light); cursor: pointer; transition: all .2s ease; }
.phase-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }
.phase-btn:hover:not(.active) { border-color: var(--primary); color: var(--primary); }
.phase-arrow { color: #94a3b8; font-size: 12px; }

/* ── Mode banner ────────────────────────────── */
.mode-banner { background: linear-gradient(135deg, var(--primary-light) 0%, var(--accent-light) 100%); border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: 16px 24px; margin: 0 0 20px; display: flex; align-items: center; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.mode-banner p { margin: 0; font-size: 14px; color: var(--text-muted); }
.mode-toggle { display: flex; gap: 8px; }
.mode-btn { padding: 8px 16px; border-radius: 8px; border: 1.5px solid var(--border); background: #fff; font-size: 13px; font-weight: 600; color: var(--text-muted); cursor: pointer; transition: all .2s; }
.mode-btn.active { background: var(--primary); color: #fff; border-color: var(--primary); }

/* ── Phase footer ───────────────────────────── */
.phase-footer { display: flex; gap: 12px; align-items: center; justify-content: flex-end; margin-top: 36px; padding-top: 24px; border-top: 1px solid var(--border); }
.btn-finish { padding: 10px 24px; border-radius: 10px; background: var(--primary); color: #fff; font-size: 14px; font-weight: 600; border: none; cursor: pointer; transition: all .2s; }
.btn-finish:hover { background: var(--primary-mid); transform: translateY(-1px); }

/* ── Learning intentions ────────────────────── */
.intentions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 16px; margin: 0 0 24px; }
.intention-card { background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius-sm); padding: 20px; }
.intention-card.mint { border-top: 3px solid var(--mint-border); background: var(--mint); }
.intention-card.sky { border-top: 3px solid var(--sky-border); background: var(--sky); }
.intention-card.peach { border-top: 3px solid var(--peach-border); background: var(--peach); }
.intention-card h3 { margin: 0 0 10px; font-size: 15px; color: var(--text); }
.intention-card ul { margin: 0; padding-left: 18px; font-size: 13px; color: var(--text-muted); line-height: 1.6; }
@media (max-width: 640px) { .intentions-grid { grid-template-columns: 1fr; } }

/* ── Key terms panel ────────────────────────── */
.key-terms-panel { background: var(--surface); border: 1.5px solid var(--border); border-radius: var(--radius); padding: 24px; margin: 0 0 24px; }
.key-terms-panel h3 { margin: 0 0 14px; font-size: 18px; color: var(--text); }
.kt-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; }
.kt-item { display: flex; flex-direction: column; gap: 4px; padding: 12px; background: #f8fafc; border-radius: 8px; }
.kt-term { font-weight: 700; font-size: 14px; color: var(--primary); }
.kt-def { font-size: 13px; color: var(--text-muted); line-height: 1.5; }
@media (max-width: 640px) { .kt-grid { grid-template-columns: 1fr; } }

/* ── Two-column worked-example pair ─────────── */
.adv-we-pair { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin-bottom: 8px; }
@media (max-width: 640px) { .adv-we-pair { grid-template-columns: 1fr; } }
.adv-we-col-a { background: #f9f5ff; border: 1.5px solid #c47b8a; border-radius: 12px; padding: 16px; }
.adv-we-col-b { background: #f5f0ff; border: 1.5px solid #6d5b8a; border-radius: 12px; padding: 16px; }
.adv-we-col-eyebrow { font-family: Outfit, sans-serif; font-size: 11px; font-weight: 800; text-transform: uppercase; letter-spacing: .06em; margin-bottom: 6px; }
.adv-we-col-a .adv-we-col-eyebrow { color: #9c5c6e; }
.adv-we-col-b .adv-we-col-eyebrow { color: #4e4068; }

/* ── Reveal button (for replacing alert) ────── */
.reveal-btn { padding: 8px 16px; border-radius: 8px; background: var(--primary-light); color: var(--primary-mid); font-size: 13px; font-weight: 600; border: 1.5px solid var(--primary-light); cursor: pointer; transition: all .2s; margin-top: 12px; }
.reveal-btn:hover { background: var(--primary); color: #fff; }
.reveal-content { display: none; margin-top: 12px; padding: 16px; background: #f8fafc; border-radius: 8px; font-size: 14px; color: var(--text-muted); border: 1px solid var(--border); }
.reveal-content.visible { display: block; }