:root {
  --bg-1: #f7f5ef;
  --bg-2: #fffefb;
  --text: #1f2328;
  --brand: #0f5e4b;
  --brand-dark: #0a4335;
  --accent: #c96b2c;
  --muted: #5b6470;
  --card: #ffffff;
  --line: #d9d3c7;
  --ok: #0e9f6e;
  --bad: #b33939;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Space Grotesk', sans-serif;
  color: var(--text);
  background: radial-gradient(1200px 700px at 85% -10%, #f3dfc5 0%, var(--bg-1) 40%, var(--bg-2) 100%);
  line-height: 1.5;
}

h1, h2, h3 {
  font-family: 'Source Serif 4', serif;
  margin: 0 0 0.6rem;
}

.hero {
  display: grid;
  grid-template-columns: 1.7fr 1fr;
  gap: 1rem;
  padding: 2rem 1.2rem 1rem;
  max-width: 1100px;
  margin: 0 auto;
}

.hero__content {
  background: linear-gradient(160deg, #123b2f 0%, #1c5a47 100%);
  color: #fff;
  padding: 1.6rem;
  border-radius: 16px;
  box-shadow: 0 10px 24px rgba(19, 54, 43, 0.28);
}

.eyebrow {
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-size: 0.78rem;
  opacity: 0.85;
}

.lead { max-width: 65ch; }

.hero__actions,
.card-actions,
.quiz-actions {
  display: flex;
  gap: 0.6rem;
  flex-wrap: wrap;
}

.progress-card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
}

main {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 1.2rem 2rem;
  display: grid;
  gap: 1rem;
}

.panel {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 16px;
  padding: 1rem;
}

.grid.two-col {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 0.7rem;
}

.outline-item {
  border: 1px solid var(--line);
  background: #fffdf8;
  border-radius: 12px;
  padding: 0.8rem;
}

.note {
  color: var(--muted);
  font-size: 0.95rem;
}

.next-steps {
  margin: 0;
  padding-left: 1.2rem;
}

.next-steps li {
  margin: 0.35rem 0;
}

.coach-message {
  border: 1px solid var(--line);
  background: #f8fbff;
  border-radius: 10px;
  padding: 0.8rem;
}

#lessonText {
  background: #f7fbf8;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.8rem;
}

.flashcard-wrap { perspective: 1000px; }

.flashcard {
  border: 1px solid var(--line);
  border-radius: 14px;
  min-height: 180px;
  padding: 1rem;
  cursor: pointer;
  background: linear-gradient(170deg, #fffcf6 0%, #fff 100%);
}

.flashcard:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
}

.flashcard__hint {
  color: var(--muted);
  font-size: 0.85rem;
}

.hidden { display: none; }

.auth-panel {
  max-width: 1100px;
  margin: 0 auto 1rem;
}

.auth-card {
  max-width: 520px;
  margin: 0 auto;
}

.auth-tabs {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0.4rem;
  margin: 0.8rem 0 1rem;
}

.auth-tab {
  border: 1px solid var(--line);
  background: #fff;
  border-radius: 10px;
  padding: 0.55rem 0.4rem;
  font: inherit;
  cursor: pointer;
}

.auth-tab.active {
  background: var(--brand);
  color: #fff;
  border-color: var(--brand);
}

.auth-view {
  border: 1px solid var(--line);
  background: #fffdf8;
  border-radius: 12px;
  padding: 0.9rem;
}

.auth-action {
  width: 100%;
  margin-top: 0.4rem;
}

.link-btn {
  margin-top: 0.55rem;
  background: none;
  border: 0;
  color: var(--brand);
  padding: 0;
  font: inherit;
  cursor: pointer;
  text-align: left;
}

.auth-session {
  margin-top: 0.8rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.label {
  display: block;
  font-size: 0.9rem;
  color: var(--muted);
  margin: 0.2rem 0;
}

.input {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.6rem 0.7rem;
  margin-bottom: 0.55rem;
  font: inherit;
}

.answers {
  display: grid;
  gap: 0.6rem;
  margin: 0.8rem 0;
}

.answer-btn {
  text-align: left;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.7rem;
  cursor: pointer;
  font: inherit;
}

.answer-btn[aria-pressed="true"] {
  border-color: var(--accent);
  background: #fff3e8;
}

.answer-btn.correct {
  border-color: var(--ok);
  background: #ebfff7;
}

.answer-btn.wrong {
  border-color: var(--bad);
  background: #fff0f0;
}

.feedback { min-height: 1.2rem; font-weight: 500; }

.feedback.ok { color: var(--ok); }
.feedback.bad { color: var(--bad); }

.timer {
  font-weight: 700;
  color: var(--brand-dark);
}

.btn {
  border: 1px solid var(--line);
  background: #fff;
  color: var(--text);
  border-radius: 10px;
  padding: 0.6rem 0.9rem;
  cursor: pointer;
  font: inherit;
}

.btn--primary {
  background: var(--brand);
  border-color: var(--brand);
  color: #fff;
}

.btn--ghost {
  background: transparent;
  border-color: rgba(255, 255, 255, 0.45);
  color: #fff;
}

.btn--small {
  font-size: 0.9rem;
  padding: 0.45rem 0.7rem;
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

footer {
  text-align: center;
  padding: 1rem;
  color: var(--muted);
}

@media (max-width: 820px) {
  .hero {
    grid-template-columns: 1fr;
  }
}