/* src/v072.css — V1.0 redesign incremental styles
   Design language: indigo→violet gradient, card hover lift, micro-interactions,
   new-user onboarding, streak, paywall, bottom-fixed finish bar, skeleton screens.
   Does NOT edit any old CSS. */

/* ===== Design language ===== */
.btn.primary, .heroPrimary, .taskFinishBtn {
  background: linear-gradient(135deg, #4F46E5, #7C3AED) !important;
  border-color: transparent !important;
  transition: transform .15s ease, box-shadow .15s ease;
}
.btn.primary:hover, .heroPrimary:hover { transform: translateY(-1px); box-shadow: 0 4px 14px rgba(79,70,229,.35); }
.btn.primary:active { transform: scale(.97); }

.metric, .quick, .card, .class-card {
  transition: transform .15s ease, box-shadow .15s ease, border-color .15s ease;
}
.metric:hover, .quick:hover, .card:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0,0,0,.08);
}

/* Fade-in animation for panel switches */
.panel { animation: v072fadeIn .25s ease; }
@keyframes v072fadeIn { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* Skeleton loading */
.v072-skeleton {
  background: linear-gradient(90deg, #f0f0f0 25%, #e0e0e0 50%, #f0f0f0 75%);
  background-size: 200% 100%;
  animation: v072shimmer 1.5s infinite;
  border-radius: 8px;
}
@keyframes v072shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ===== New user onboarding ===== */
.v072-onboarding {
  display: none;
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  color: #fff;
  border-radius: 16px;
  padding: 32px 28px;
  margin-bottom: 20px;
  text-align: center;
}
.v072-onboarding.show { display: block; animation: v072fadeIn .4s ease; }
.v072-onboarding h2 { margin: 0 0 8px; font-size: 22px; }
.v072-onboarding p { margin: 0 0 20px; opacity: .9; font-size: 13px; }
.v072-onboarding .v072-start-btn {
  background: #fff;
  color: #4F46E5;
  border: 0;
  border-radius: 10px;
  padding: 14px 36px;
  font-size: 15px;
  font-weight: 800;
  cursor: pointer;
  transition: transform .15s;
}
.v072-onboarding .v072-start-btn:hover { transform: scale(1.03); }
.v072-onboarding small { display: block; margin-top: 12px; opacity: .7; font-size: 11px; }

/* ===== Streak badge ===== */
.v072-streak {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: linear-gradient(135deg, #fef3c7, #fde68a);
  color: #92400e;
  border-radius: 20px;
  padding: 4px 12px;
  font-size: 12px;
  font-weight: 800;
}

/* ===== Recent mistakes ===== */
.v072-mistakes { margin-top: 16px; }
.v072-mistake-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 14px;
  border: 1px solid #fee2e2;
  background: #fef2f2;
  border-radius: 10px;
  margin-bottom: 6px;
  font-size: 12px;
  cursor: pointer;
  transition: background .15s;
}
.v072-mistake-item:hover { background: #fee2e2; }

/* ===== Upgrade button in nav ===== */
.v072-upgrade-btn {
  background: linear-gradient(135deg, #4F46E5, #7C3AED) !important;
  color: #fff !important;
  border: 0 !important;
  border-radius: 8px;
  padding: 6px 14px !important;
  font-size: 11px !important;
  font-weight: 800 !important;
  cursor: pointer;
}

/* ===== Paywall modal ===== */
.v072-paywall-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,.5);
  display: none;
  place-items: center;
  z-index: 9999;
}
.v072-paywall-overlay.show { display: grid; }
.v072-paywall-card {
  background: #fff;
  border-radius: 18px;
  padding: 28px;
  width: min(420px, 90vw);
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,.25);
}
.v072-paywall-card h3 { margin: 0 0 8px; font-size: 18px; }
.v072-paywall-card p { font-size: 12px; color: #64748b; margin: 6px 0; }
.v072-paywall-plans { display: flex; gap: 8px; margin: 16px 0; }
.v072-paywall-plan {
  flex: 1;
  border: 2px solid #e2e8f0;
  border-radius: 12px;
  padding: 12px 8px;
  cursor: pointer;
  transition: border-color .15s;
}
.v072-paywall-plan.selected { border-color: #4F46E5; background: #f5f3ff; }
.v072-paywall-plan b { display: block; font-size: 18px; }
.v072-paywall-plan span { font-size: 10px; color: #64748b; }
.v072-paywall-plan .v072-badge {
  display: inline-block; background: #4F46E5; color: #fff;
  font-size: 9px; padding: 2px 6px; border-radius: 4px; margin-bottom: 4px;
}

/* ===== Bottom fixed finish bar ===== */
.v072-bottom-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  background: #fff;
  border-top: 1px solid #e2e8f0;
  padding: 10px 20px;
  display: none;
  justify-content: space-between;
  align-items: center;
  z-index: 100;
  box-shadow: 0 -4px 12px rgba(0,0,0,.06);
}
body.workspace-mode .v072-bottom-bar { display: flex; }
.v072-bottom-bar .v072-hint-btn {
  border: 1px solid #e2e8f0; background: #fff;
  border-radius: 8px; padding: 8px 14px; font-size: 11px; cursor: pointer;
}
.v072-bottom-bar .v072-finish-btn {
  background: linear-gradient(135deg, #4F46E5, #7C3AED);
  color: #fff; border: 0; border-radius: 8px;
  padding: 10px 28px; font-size: 13px; font-weight: 800; cursor: pointer;
}

/* ===== Progress level bar ===== */
.v072-level-bar {
  background: #f1f5f9; border-radius: 10px; height: 24px;
  position: relative; overflow: hidden; margin: 8px 0;
}
.v072-level-fill {
  background: linear-gradient(90deg, #4F46E5, #7C3AED);
  height: 100%; border-radius: 10px;
  display: flex; align-items: center; justify-content: flex-end;
  padding-right: 8px; color: #fff; font-size: 10px; font-weight: 800;
  transition: width .6s ease;
}
.v072-level-target {
  position: absolute; top: 0; bottom: 0; width: 2px; background: #dc2626;
}
.v072-level-labels {
  display: flex; justify-content: space-between; font-size: 10px; color: #64748b;
}

/* ===== Practice filter chips ===== */
.v072-chip-bar {
  display: flex; flex-wrap: wrap; gap: 6px; margin: 8px 0;
}
.v072-chip {
  display: inline-flex; align-items: center; gap: 4px;
  background: #eef2ff; color: #4338ca;
  border-radius: 16px; padding: 4px 10px;
  font-size: 11px; font-weight: 600;
}
.v072-chip button {
  background: none; border: 0; color: #4338ca; cursor: pointer;
  font-size: 12px; padding: 0; line-height: 1;
}

/* ===== Question card status ===== */
.v072-q-status {
  display: inline-flex; align-items: center; gap: 3px;
  font-size: 10px; font-weight: 700;
}
.v072-q-status.correct { color: #16a34a; }
.v072-q-status.wrong { color: #dc2626; }
.v072-q-status.partial { color: #d97706; }
.v072-q-status.unsure { color: #64748b; }

/* ===== Free mode indicator ===== */
.v072-free-indicator {
  display: inline-flex; align-items: center; gap: 4px;
  background: #fef3c7; color: #92400e;
  border-radius: 6px; padding: 3px 8px;
  font-size: 10px; font-weight: 700;
}