:root {
  --bg: #fdf7eb;
  --panel: rgba(255, 255, 255, 0.82);
  --panel-strong: #fffdf8;
  --ink: #183153;
  --muted: #54708a;
  --accent: #ff8f3d;
  --accent-deep: #f26b1d;
  --mint: #9bd4b7;
  --sky: #d7ecff;
  --rose: #ffe0d2;
  --line: rgba(24, 49, 83, 0.12);
  --shadow: 0 18px 50px rgba(24, 49, 83, 0.12);
  --radius: 24px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: ui-rounded, "Trebuchet MS", "Avenir Next", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(255, 143, 61, 0.2), transparent 30%),
    radial-gradient(circle at bottom right, rgba(155, 212, 183, 0.28), transparent 34%),
    linear-gradient(180deg, #fff8ea 0%, #fdf7eb 42%, #f8f2e3 100%);
}

.page-shell {
  width: min(1180px, calc(100% - 32px));
  margin: 0 auto;
  padding: 28px 0 44px;
}

/* ---- Auth Bar ---- */
.auth-bar {
  margin-bottom: 18px;
  padding: 14px 20px;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: 16px;
  box-shadow: 0 4px 16px rgba(24, 49, 83, 0.06);
}

.auth-view {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-wrap: wrap;
}

.auth-input {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 12px;
  font-size: 0.9rem;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
}

.auth-btn {
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent) 0%, #ffb15c 100%);
  color: white;
  padding: 8px 18px;
  font-size: 0.9rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.auth-btn.secondary {
  background: var(--sky);
  color: var(--ink);
}

.auth-btn:hover { opacity: 0.9; }

.auth-status {
  margin: 6px 0 0;
  font-size: 0.85rem;
  color: var(--muted);
}

.auth-status.warning { color: #b75620; }

.user-info {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-wrap: wrap;
}

.user-greeting { font-size: 1rem; }

.user-coins {
  padding: 4px 12px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffd700 0%, #ffb347 100%);
  color: #5a3e00;
  font-weight: 700;
  font-size: 0.85rem;
}

.user-streak {
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--mint);
  color: #1a4a2e;
  font-weight: 700;
  font-size: 0.85rem;
}

.user-actions {
  display: flex;
  gap: 8px;
  margin-top: 8px;
}

/* ---- Hero ---- */
.hero {
  display: grid;
  grid-template-columns: 1.4fr 0.9fr;
  gap: 24px;
  align-items: stretch;
  margin-bottom: 24px;
}

.hero-copy,
.hero-card,
.card {
  position: relative;
  background: var(--panel);
  border: 1px solid rgba(255, 255, 255, 0.7);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
}

.hero-copy {
  padding: 34px;
}

.hero-copy h1 {
  margin: 8px 0 12px;
  font-size: clamp(2.4rem, 4vw, 4.3rem);
  line-height: 0.94;
  letter-spacing: -0.04em;
  font-family: "Georgia", "Palatino Linotype", serif;
}

.lead,
.hero-card li,
.card p,
.card label,
.card textarea,
.card li {
  font-size: 1rem;
  line-height: 1.6;
}

.eyebrow {
  margin: 0;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--accent-deep);
  font-size: 0.8rem;
  font-weight: 700;
}

.hero-card {
  overflow: hidden;
  padding: 30px;
  background: linear-gradient(180deg, #fff5d6 0%, #fffdf6 100%);
}

.hero-card ul {
  padding-left: 18px;
  margin: 12px 0 0;
}

.spark {
  position: absolute;
  border-radius: 999px;
  opacity: 0.8;
  animation: bob 5.5s ease-in-out infinite;
}

.spark-a {
  width: 90px;
  height: 90px;
  top: -10px;
  right: 18px;
  background: rgba(255, 143, 61, 0.22);
}

.spark-b {
  width: 140px;
  height: 140px;
  bottom: -28px;
  left: -18px;
  background: rgba(155, 212, 183, 0.26);
  animation-delay: 0.8s;
}

/* ---- Workspace ---- */
.workspace {
  display: grid;
  gap: 24px;
}

.card {
  padding: 24px;
}

.ask-panel textarea,
.answer-form textarea {
  width: 100%;
  min-height: 112px;
  margin-top: 10px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 20px;
  resize: vertical;
  background: rgba(255, 255, 255, 0.94);
  color: var(--ink);
}

/* ---- Age selector ---- */
.age-selector {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-top: 14px;
}

.age-selector label {
  font-weight: 600;
  color: var(--muted);
  font-size: 0.92rem;
}

.age-selector select {
  padding: 8px 14px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  color: var(--ink);
  font-size: 0.92rem;
}

.action-row {
  display: flex;
  gap: 16px;
  align-items: center;
  margin-top: 16px;
}

button {
  border: none;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--accent) 0%, #ffb15c 100%);
  color: white;
  padding: 14px 22px;
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  box-shadow: 0 12px 24px rgba(242, 107, 29, 0.22);
  transition: transform 140ms ease, box-shadow 140ms ease, opacity 140ms ease;
}

button:hover:not(:disabled) {
  transform: translateY(-1px) scale(1.01);
  box-shadow: 0 16px 28px rgba(242, 107, 29, 0.26);
}

button:disabled {
  opacity: 0.55;
  cursor: progress;
}

.status-text {
  margin: 0;
  color: var(--muted);
}

.status-text.warning {
  color: #b75620;
}

.lesson-grid {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 24px;
}

.session-meta {
  display: flex;
  gap: 14px;
  align-items: center;
  margin-bottom: 18px;
  color: var(--muted);
}

.meta-pill,
.step-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 90px;
  padding: 8px 14px;
  border-radius: 999px;
  background: var(--sky);
  color: var(--ink);
  font-weight: 700;
}

.age-pill {
  background: var(--rose);
}

.step-badge.complete {
  background: var(--mint);
}

.current-step h2,
.feedback-panel h2,
.summary-panel h2,
.summary-panel h3 {
  font-family: "Georgia", "Palatino Linotype", serif;
}

.step-goal {
  color: var(--muted);
  margin: 12px 0 8px;
}

.step-prompt {
  font-size: 1.08rem;
}

.bubble {
  margin-top: 14px;
  padding: 14px 16px;
  border-radius: 18px;
}

.bubble.info {
  background: #fff2d7;
}

.bubble.explain {
  background: #eef7ff;
}

.bubble.hint {
  background: #ffe6dc;
}

.answer-form {
  margin-top: 20px;
}

/* ---- Reward Banner ---- */
.reward-banner {
  margin-top: 14px;
  padding: 14px 18px;
  border-radius: 18px;
  font-weight: 600;
  animation: reward-pop 400ms ease;
}

.reward-banner.correct {
  background: linear-gradient(135deg, #e8f5e9 0%, #c8e6c9 100%);
  border: 2px solid #66bb6a;
  color: #2e7d32;
}

.reward-banner.encouragement {
  background: #fff3e0;
  border: 2px solid #ffb74d;
  color: #e65100;
}

.reward-msg { font-size: 1.1rem; }

.reward-coins {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, #ffd700, #ffb347);
  color: #5a3e00;
  font-size: 0.85rem;
  margin-left: 8px;
}

.reward-streak {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  background: var(--mint);
  color: #1a4a2e;
  font-size: 0.85rem;
  margin-left: 4px;
}

.reward-streak-msg {
  font-size: 0.95rem;
  color: #1565c0;
}

.reward-complete {
  font-size: 1rem;
  color: #2e7d32;
}

.reward-encourage {
  font-size: 1rem;
}

@keyframes reward-pop {
  0% { transform: scale(0.9); opacity: 0; }
  50% { transform: scale(1.03); }
  100% { transform: scale(1); opacity: 1; }
}

/* ---- Timeline ---- */
.timeline {
  display: grid;
  gap: 14px;
}

.timeline-item {
  padding: 16px;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--panel-strong);
  animation: lift-in 220ms ease;
}

.timeline-item.correct {
  border-left: 6px solid #6abb89;
}

.timeline-item.retry {
  border-left: 6px solid #ff9a62;
}

.timeline-step {
  margin: 0 0 6px;
  color: var(--muted);
  font-size: 0.92rem;
}

.timeline-answer,
.timeline-feedback,
.timeline-hint {
  margin: 6px 0 0;
}

/* ---- Summary ---- */
.summary-panel {
  background: linear-gradient(180deg, #fffdf8 0%, #fff6e9 100%);
}

.summary-header p,
.summary-answer p {
  margin-top: 8px;
}

.summary-columns {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 18px;
  margin-top: 18px;
}

.summary-columns section,
.summary-answer,
.recap-item {
  padding: 18px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.82);
  border: 1px solid rgba(24, 49, 83, 0.08);
}

.summary-recap {
  margin-top: 18px;
  display: grid;
  gap: 14px;
}

/* ---- Dashboard ---- */
.dash-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.dash-header h1 {
  margin: 6px 0 0;
  font-family: "Georgia", "Palatino Linotype", serif;
  font-size: 2rem;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 16px;
  margin-bottom: 24px;
}

.stat-card {
  text-align: center;
  padding: 20px;
}

.stat-label {
  margin: 0;
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.stat-value {
  margin: 8px 0 0;
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent-deep);
  font-family: "Georgia", "Palatino Linotype", serif;
}

.generate-btn {
  margin-top: 12px;
}

.domain-insights {
  display: grid;
  gap: 12px;
  margin-top: 14px;
}

.insight-card {
  padding: 14px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.insight-card h4 {
  margin: 0 0 6px;
  color: var(--accent-deep);
}

.insight-suggestion {
  color: var(--muted);
  font-style: italic;
}

/* ---- Leaderboard table ---- */
.lb-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 12px;
}

.lb-table th {
  text-align: left;
  padding: 10px 12px;
  border-bottom: 2px solid var(--line);
  color: var(--muted);
  font-size: 0.85rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.lb-table td {
  padding: 10px 12px;
  border-bottom: 1px solid rgba(24, 49, 83, 0.06);
}

.lb-table tr:hover { background: rgba(215, 236, 255, 0.3); }

.lb-self {
  background: rgba(255, 215, 0, 0.12) !important;
  font-weight: 600;
}

.lb-rank {
  font-weight: 700;
  color: var(--accent-deep);
}

/* ---- Session history ---- */
.session-history {
  display: grid;
  gap: 10px;
  margin-top: 12px;
}

.history-item {
  padding: 14px 18px;
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.7);
  border: 1px solid var(--line);
}

.history-item.complete { border-left: 5px solid #6abb89; }
.history-item.incomplete { border-left: 5px solid var(--line); }

.history-question {
  margin: 0 0 6px;
  font-weight: 600;
}

.history-meta {
  display: flex;
  gap: 14px;
  color: var(--muted);
  font-size: 0.85rem;
}

.muted { color: var(--muted); }

/* ---- Helpers ---- */
.empty-state {
  color: var(--muted);
}

.hidden {
  display: none;
}

/* ---- Animations ---- */
@keyframes bob {
  0%,
  100% {
    transform: translateY(0px);
  }
  50% {
    transform: translateY(-10px);
  }
}

@keyframes lift-in {
  from {
    opacity: 0;
    transform: translateY(8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---- Responsive ---- */
@media (max-width: 920px) {
  .hero,
  .lesson-grid,
  .summary-columns {
    grid-template-columns: 1fr;
  }

  .stats-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .page-shell {
    width: min(100% - 20px, 1180px);
  }

  .hero-copy,
  .hero-card,
  .card {
    padding: 20px;
  }

  .action-row {
    flex-direction: column;
    align-items: stretch;
  }

  .auth-view {
    flex-direction: column;
    align-items: stretch;
  }

  button {
    width: 100%;
  }
}