/* ============================================================
   gate.css — Feature gating UI: locks, badges, upgrade modal
   ============================================================ */

/* ── Sidebar nav lock/usage badges ─────────────────────── */
.feature-lock-badge {
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: auto;
  font-size: .75rem;
  background: rgba(245, 158, 11, .15);
  color: #F59E0B;
  padding: 2px 6px;
  border-radius: 100px;
  flex-shrink: 0;
}
.feature-usage-badge {
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: auto;
  font-size: .7rem;
  background: rgba(59, 130, 246, .15);
  color: #3B82F6;
  padding: 2px 8px;
  border-radius: 100px;
  font-weight: 700;
  flex-shrink: 0;
}
.feature-trial-badge {
  display: inline-flex; align-items: center; justify-content: center;
  margin-left: auto;
  font-size: .68rem;
  background: linear-gradient(135deg, rgba(16,185,129,.18), rgba(34,197,94,.18));
  color: #059669;
  padding: 2px 8px;
  border-radius: 100px;
  font-weight: 800;
  flex-shrink: 0;
  letter-spacing: .02em;
}
[data-theme="dark"] .feature-trial-badge { color: #34D399; }

/* ── Course card locked state ──────────────────────────── */
.course-card.locked {
  position: relative;
  overflow: hidden;
}
.course-card.locked .course-card-banner { filter: grayscale(.5) brightness(.85); }
.course-card.locked .course-card-cta {
  background: linear-gradient(135deg, #F59E0B, #EF4444);
  color: #fff;
}

.course-lock-overlay {
  position: absolute;
  top: 12px; right: 12px;
  background: rgba(15, 23, 42, .85);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 700;
  display: flex; align-items: center; gap: 6px;
  z-index: 2;
}
.course-lock-overlay::before {
  content: '🔒';
  font-size: .9rem;
}

.course-required-plan {
  display: inline-flex; align-items: center; gap: 6px;
  background: rgba(245, 158, 11, .15);
  color: #D97706;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 700;
  margin-bottom: 8px;
}
[data-theme="dark"] .course-required-plan { color: #FCD34D; }

/* ── Trial state for course cards ──────────────────────── */
.course-trial-overlay {
  position: absolute;
  top: 12px; right: 12px;
  background: linear-gradient(135deg, #10B981, #22C55E);
  color: #fff;
  padding: 6px 12px;
  border-radius: 100px;
  font-size: .8rem;
  font-weight: 800;
  display: flex; align-items: center; gap: 6px;
  z-index: 2;
  box-shadow: 0 4px 14px rgba(16, 185, 129, .4);
  animation: trialPulse 2.4s ease-in-out infinite;
}
@keyframes trialPulse {
  0%, 100% { box-shadow: 0 4px 14px rgba(16, 185, 129, .4); }
  50%      { box-shadow: 0 4px 22px rgba(16, 185, 129, .65); }
}

.course-trial-pill {
  display: inline-flex; align-items: center; gap: 6px;
  background: linear-gradient(135deg, rgba(16,185,129,.15), rgba(34,197,94,.15));
  color: #059669;
  padding: 4px 10px;
  border-radius: 100px;
  font-size: .78rem;
  font-weight: 800;
  margin-bottom: 8px;
  border: 1px solid rgba(16, 185, 129, .25);
}
[data-theme="dark"] .course-trial-pill { color: #34D399; border-color: rgba(52, 211, 153, .35); }

.course-card.on-trial {
  outline: 2px solid rgba(16, 185, 129, .35);
  outline-offset: -2px;
}

/* ── Upgrade modal ─────────────────────────────────────── */
.upgrade-modal-overlay {
  position: fixed; inset: 0;
  background: rgba(15, 23, 42, .8);
  backdrop-filter: blur(8px);
  display: grid; place-items: center;
  z-index: 9999;
  padding: 16px;
  animation: fadeIn .2s ease-out;
}

.upgrade-modal-card {
  background: var(--surface, #fff);
  color: var(--text, #0F172A);
  border-radius: 24px;
  padding: 32px 28px 24px;
  width: 100%; max-width: 480px;
  position: relative;
  box-shadow: 0 30px 80px rgba(0,0,0,.5);
  animation: slideUp .3s cubic-bezier(.34, 1.56, .64, 1);
  max-height: 92vh;
  overflow-y: auto;
}
[data-theme="dark"] .upgrade-modal-card { background: #1E293B; color: #F8FAFC; }

.upgrade-modal-close {
  position: absolute; top: 14px; right: 14px;
  width: 36px; height: 36px;
  border: 0; background: transparent;
  font-size: 1.6rem; cursor: pointer;
  border-radius: 8px;
  color: inherit;
  transition: background .15s;
}
.upgrade-modal-close:hover { background: rgba(0,0,0,.08); }
[data-theme="dark"] .upgrade-modal-close:hover { background: rgba(255,255,255,.1); }

.upgrade-modal-head {
  text-align: center;
  margin-bottom: 20px;
}
.upgrade-modal-icon {
  width: 64px; height: 64px;
  margin: 0 auto 14px;
  background: linear-gradient(135deg, #F59E0B, #EF4444);
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 2rem;
  box-shadow: 0 8px 24px rgba(245, 158, 11, .35);
}
.upgrade-modal-head h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 8px;
}
.upgrade-modal-head p {
  color: var(--text2, #64748B);
  font-size: .95rem;
  line-height: 1.5;
}

/* Tier card */
.upgrade-tier {
  background: var(--surface2, #F8FAFC);
  border: 2px solid;
  border-radius: 16px;
  padding: 18px 20px;
  margin-bottom: 20px;
}
.upgrade-tier-starter   { border-color: #22C55E; background: linear-gradient(135deg, rgba(34,197,94,.08), rgba(34,197,94,.02)); }
.upgrade-tier-standard  { border-color: #2563EB; background: linear-gradient(135deg, rgba(37,99,235,.08), rgba(37,99,235,.02)); }
.upgrade-tier-pro       { border-color: #7C3AED; background: linear-gradient(135deg, rgba(124,58,237,.08), rgba(124,58,237,.02)); }
.upgrade-tier-business  { border-color: #0EA5E9; background: linear-gradient(135deg, rgba(14,165,233,.08), rgba(14,165,233,.02)); }

[data-theme="dark"] .upgrade-tier { background: rgba(255,255,255,.04); }

.upgrade-tier-head {
  display: flex; justify-content: space-between; align-items: baseline;
  margin-bottom: 14px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--border, #E2E8F0);
}
.upgrade-tier-name { font-size: 1.1rem; font-weight: 700; }
.upgrade-tier-price { font-size: 1.4rem; font-weight: 800; color: var(--accent, #2563EB); }
.upgrade-tier-price small { font-size: .75rem; color: var(--text2, #64748B); font-weight: 400; }

.upgrade-tier-features {
  list-style: none;
  padding: 0;
  display: flex; flex-direction: column; gap: 6px;
}
.upgrade-tier-features li {
  font-size: .9rem;
  color: var(--text, #1E293B);
}
[data-theme="dark"] .upgrade-tier-features li { color: #E2E8F0; }

/* Actions */
.upgrade-modal-actions {
  display: flex; flex-direction: column; gap: 8px;
  margin-bottom: 14px;
}
.upgrade-modal-actions .btn { width: 100%; justify-content: center; }
.upgrade-modal-actions .btn-primary {
  background: linear-gradient(135deg, #F59E0B, #EF4444);
  box-shadow: 0 4px 16px rgba(245, 158, 11, .35);
  font-size: 1rem;
  padding: 14px;
}
.upgrade-modal-actions .btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 24px rgba(245, 158, 11, .5);
}

.upgrade-modal-foot {
  text-align: center;
  font-size: .8rem;
  color: var(--text2, #64748B);
  padding-top: 12px;
  border-top: 1px solid var(--border, #E2E8F0);
}

/* ── User plan badge in sidebar ─────────────────────────── */
.plan-badge {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 2px 10px;
  border-radius: 100px;
  font-size: .7rem;
  font-weight: 700;
}
.plan-badge-free     { background: rgba(100, 116, 139, .15); color: #64748B; }
.plan-badge-starter  { background: rgba(34, 197, 94, .15);   color: #16A34A; }
.plan-badge-standard { background: rgba(37, 99, 235, .15);   color: #2563EB; }
.plan-badge-pro      { background: rgba(124, 58, 237, .15);  color: #7C3AED; }
.plan-badge-business { background: rgba(14, 165, 233, .15);  color: #0284C7; }

/* ── Daily usage indicator (e.g. flashcards) ───────────── */
.usage-indicator {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(59, 130, 246, .08);
  color: #3B82F6;
  padding: 8px 14px;
  border-radius: 12px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 12px;
}
.usage-indicator strong { color: var(--text); }
.usage-indicator .usage-bar {
  width: 80px; height: 6px;
  background: rgba(59, 130, 246, .2);
  border-radius: 3px;
  overflow: hidden;
}
.usage-indicator .usage-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, #3B82F6, #1D4ED8);
  border-radius: 3px;
  transition: width .3s;
}

/* ── Locked content placeholder (in-page) ──────────────── */
.locked-content {
  text-align: center;
  padding: 60px 24px;
  background: var(--surface2, #F8FAFC);
  border-radius: 20px;
  border: 2px dashed var(--border, #E2E8F0);
  margin: 20px auto;
  max-width: 560px;
}
[data-theme="dark"] .locked-content { background: rgba(255,255,255,.04); border-color: #334155; }

.locked-content-icon {
  width: 80px; height: 80px;
  margin: 0 auto 18px;
  background: linear-gradient(135deg, #F59E0B, #EF4444);
  border-radius: 50%;
  display: grid; place-items: center;
  font-size: 2.4rem;
  box-shadow: 0 12px 32px rgba(245, 158, 11, .3);
}
.locked-content h3 {
  font-size: 1.4rem;
  font-weight: 800;
  margin-bottom: 10px;
}
.locked-content p {
  color: var(--text2, #64748B);
  margin-bottom: 20px;
  line-height: 1.6;
}
.locked-content .btn { padding: 14px 28px; }

/* ── Mobile tweaks ─────────────────────────────────────── */
@media (max-width: 480px) {
  .upgrade-modal-card { padding: 28px 20px 20px; border-radius: 18px; }
  .upgrade-modal-head h2 { font-size: 1.3rem; }
  .upgrade-tier-price { font-size: 1.2rem; }
  .upgrade-modal-actions .btn-primary { font-size: .9rem; padding: 12px; }
}