/* DPP (Daily Practice Problems) Stylesheet — NCERT-style typography */

:root {
  /* Match main site palette (css/style.css): teal primary + amber accent */
  --dpp-navy: #0d7a6b;        /* --primary */
  --dpp-navy-dark: #0a5c50;   /* --primary-dark */
  --dpp-gold: #f59e0b;        /* --accent */
  --dpp-gold-soft: #fff7e6;   /* soft amber tint */
}

body { background: #f0faf7; }  /* --primary-bg */

.dpp-hero {
  background: linear-gradient(135deg, var(--dpp-navy) 0%, var(--dpp-navy-dark) 100%);
  color: #fff;
  padding: 2.2rem 0 1.8rem;
}
.dpp-hero h1 { letter-spacing: 0.5px; }
.dpp-hero h2 { letter-spacing: 0.3px; font-weight: 500; }

.dpp-badge-a {
  display: inline-flex; align-items: center; justify-content: center;
  width: 44px; height: 44px; border-radius: 12px;
  background: var(--dpp-gold); color: var(--dpp-navy);
  font-weight: 800; font-size: 1.4rem;
}

.dpp-meta-chip {
  display: inline-block; background: rgba(255,255,255,0.12);
  border: 1px solid rgba(255,255,255,0.25);
  border-radius: 999px; padding: 0.25rem 0.85rem;
  font-size: 0.85rem; margin: 0.15rem 0.2rem 0.15rem 0;
}

.dpp-streak {
  display: none; /* JS shows it when count >= 1 */
  background: var(--dpp-gold); color: var(--dpp-navy);
  border-radius: 999px; padding: 0.35rem 1rem;
  font-weight: 700; font-size: 0.9rem;
}

/* Question card */
.dpp-q {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 14px;
  padding: 1.3rem 1.2rem; margin-bottom: 1.5rem;
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.dpp-q-num {
  display: inline-block; background: var(--dpp-navy); color: #fff;
  border-radius: 8px; padding: 0.15rem 0.65rem;
  font-weight: 700; font-size: 0.8rem; margin-bottom: 0.7rem;
}

.dpp-q-text {
  font-size: 1.05rem; font-weight: 500; color: #111827;
  line-height: 1.6; letter-spacing: 0.3px;
  font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

.dpp-opt {
  display: flex; align-items: center; gap: 0.8rem;
  border: 1.5px solid #d1d5db; border-radius: 10px;
  padding: 0.8rem 1rem; margin-top: 0.7rem;
  min-height: 44px; cursor: pointer; width: 100%;
  background: #fff; transition: border-color 0.15s, background 0.15s, box-shadow 0.15s;
  font-size: 0.95rem; line-height: 1.5; color: #374151;
}

.dpp-opt input {
  width: 1.1rem; height: 1.1rem; flex-shrink: 0;
  accent-color: var(--dpp-navy);
}

.dpp-opt:hover { border-color: #9ca3af; }
.dpp-opt.selected { border-color: var(--dpp-navy); background: #f0f6ff; box-shadow: 0 1px 3px rgba(26,58,82,0.08); }
.dpp-opt.correct { border-color: #10b981; background: #ecfdf5; }
.dpp-opt.wrong { border-color: #ef4444; background: #fef2f2; }

.dpp-q.locked .dpp-opt { cursor: default; }
.dpp-q.locked .dpp-opt:hover { border-color: #d1d5db; }
.dpp-q.locked .dpp-opt.correct:hover { border-color: #10b981; }
.dpp-q.locked .dpp-opt.wrong:hover { border-color: #ef4444; }

.dpp-check-btn {
  margin-top: 1rem; background: var(--dpp-navy); color: #fff;
  border: none; border-radius: 10px; padding: 0.7rem 1.6rem;
  font-weight: 600; min-height: 44px; font-size: 0.95rem;
  cursor: pointer; transition: background 0.15s;
}

.dpp-check-btn:hover:not(:disabled) { background: var(--dpp-navy-dark); }
.dpp-check-btn:disabled { opacity: 0.5; cursor: not-allowed; }

.dpp-result {
  margin-top: 0.75rem; font-weight: 700; display: none;
}

.dpp-result.ok { color: #198754; }
.dpp-result.no { color: #dc3545; }

.dpp-solution {
  display: none; margin-top: 1rem;
  background: var(--dpp-gold-soft); border-left: 4px solid var(--dpp-gold);
  border-radius: 0 10px 10px 0; padding: 1rem 1.2rem;
  font-size: 0.95rem; color: #374151;
  line-height: 1.7; letter-spacing: 0.2px;
}

.dpp-solution .sol-label {
  font-weight: 700; color: var(--dpp-navy); display: block;
  margin-bottom: 0.6rem; font-size: 0.98rem;
}

/* Score card */
.dpp-score {
  display: none; background: var(--dpp-navy); color: #fff;
  border-radius: 16px; padding: 1.5rem 1.25rem; text-align: center;
  margin: 1.5rem 0;
}

.dpp-score .score-big {
  font-size: 2.2rem; font-weight: 800; color: var(--dpp-gold);
}

/* Nav links between DPPs */
.dpp-nav-links a {
  display: inline-block; border: 2px solid var(--dpp-navy); color: var(--dpp-navy);
  border-radius: 10px; padding: 0.55rem 1.1rem; font-weight: 600;
  text-decoration: none; min-height: 44px; margin: 0.25rem;
}

.dpp-nav-links a:hover { background: var(--dpp-navy); color: #fff; }

/* WhatsApp CTA */
.dpp-wa-cta {
  background: #e8f5ee; border: 1px solid #b7e0c8; border-radius: 14px;
  padding: 1.1rem 1rem; text-align: center; margin: 1.5rem 0;
}

.dpp-wa-cta .btn-wa {
  background: #25d366; color: #fff; font-weight: 700;
  border-radius: 10px; padding: 0.65rem 1.3rem; min-height: 44px;
  text-decoration: none; display: inline-block; margin-top: 0.5rem;
}

/* Kit card */
.dpp-kit-card {
  background: #fff; border: 2px solid var(--dpp-gold); border-radius: 14px;
  padding: 1.25rem 1rem; margin: 1.5rem 0;
}

.dpp-kit-card .kit-tag {
  display: inline-block; background: var(--dpp-navy); color: #fff;
  border-radius: 999px; font-size: 0.75rem; font-weight: 700;
  padding: 0.2rem 0.7rem; margin-bottom: 0.5rem;
}

.dpp-kit-card .kit-cta {
  display: inline-block; background: var(--dpp-gold); color: var(--dpp-navy);
  font-weight: 700; border-radius: 10px; padding: 0.6rem 1.2rem;
  min-height: 44px; text-decoration: none; margin-top: 0.6rem;
}

.katex { font-size: 1.05em; }
.katex-display { overflow-x: auto; overflow-y: hidden; }

@media (max-width: 400px) {
  .dpp-q-text { font-size: 1rem; }
}

/* Archive: class tabs with date dropdown */
.dpp-tabs {
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  margin-bottom: 1.25rem;
}

.dpp-tab {
  flex: 1 1 auto; min-width: 88px; min-height: 44px;
  background: #fff; border: 1.5px solid #d1d5db; border-radius: 12px;
  color: var(--dpp-navy); font-weight: 700; font-size: 0.95rem;
  padding: 0.5rem 1rem; cursor: pointer;
  transition: background 0.15s, border-color 0.15s, color 0.15s;
}

.dpp-tab:hover { border-color: var(--dpp-navy); background: #f0f6ff; }

.dpp-tab.active {
  background: var(--dpp-navy); border-color: var(--dpp-navy); color: #fff;
  box-shadow: 0 2px 8px rgba(18,41,59,0.18);
}

.dpp-tab-panel {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 16px;
  padding: 1.2rem 1.1rem 1.35rem; box-shadow: 0 2px 8px rgba(18,41,59,0.06);
}

.dpp-tab-panel[hidden] { display: none; }

.dpp-panel-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1rem;
}

.dpp-panel-title {
  font-weight: 800; font-size: 1.05rem; color: var(--dpp-navy);
  letter-spacing: 0.2px;
}

/* Archive: class-wise cards with date dropdown */
.dpp-class-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.1rem;
}

.dpp-class-card {
  background: #fff; border: 1px solid #e5e7eb; border-radius: 16px;
  padding: 1.1rem 1.1rem 1.25rem; box-shadow: 0 2px 8px rgba(18,41,59,0.06);
  transition: box-shadow 0.15s, transform 0.15s;
}

.dpp-class-card:hover { box-shadow: 0 6px 18px rgba(18,41,59,0.12); transform: translateY(-2px); }

.dpp-class-card-head {
  display: flex; align-items: center; justify-content: space-between;
  gap: 0.6rem; margin-bottom: 0.9rem;
}

.dpp-class-badge {
  display: inline-block; background: var(--dpp-navy); color: #fff;
  border-radius: 999px; font-weight: 800; font-size: 0.95rem;
  padding: 0.35rem 0.9rem; letter-spacing: 0.2px; white-space: nowrap;
}

.dpp-date-select {
  border: 1.5px solid #d1d5db; border-radius: 8px; background: #fff;
  padding: 0.4rem 0.6rem; font-size: 0.85rem; font-weight: 600;
  color: var(--dpp-navy); min-height: 38px; max-width: 100%;
  cursor: pointer;
}

.dpp-date-select:focus { outline: none; border-color: var(--dpp-navy); }

.dpp-card-subjects {
  display: flex; flex-direction: column; gap: 0.5rem;
}

.dpp-card-subject {
  display: block; text-decoration: none; color: #1f2937;
  background: #f8f9fb; border: 1px solid #eef0f3; border-radius: 10px;
  padding: 0.6rem 0.75rem; font-size: 0.9rem; font-weight: 600;
  line-height: 1.4; transition: background 0.15s, border-color 0.15s;
}

.dpp-card-subject:hover { background: var(--dpp-gold-soft); border-color: var(--dpp-gold); color: var(--dpp-navy); }

@media (max-width: 480px) {
  .dpp-class-grid { grid-template-columns: 1fr; }
}