@import url('https://fonts.googleapis.com/css2?family=Literata:opsz,wght@7..72,400;7..72,600;7..72,700&family=Golos+Text:wght@400;500;600;700&family=JetBrains+Mono:wght@400;500;700&display=swap');

:root {
  --bg: #17120f;
  --card: #221b16;
  --card-alt: #2a2119;
  --card-border: #382b21;
  --accent: #d97757;
  --accent-soft: #3a261b;
  --accent-text: #1a0e07;
  --text: #f4ece3;
  --text-dim: #ab9887;
  --text-faint: #7a6555;
  --green: #86b06f;
  --green-soft: #1e2a1b;
  --red: #d9705a;
  --radius: 18px;

  --font-serif: "Literata", Georgia, serif;
  --font-sans: "Golos Text", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

#app {
  min-height: 100vh;
  padding: 18px 16px 40px;
}

.loading {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 60vh;
  color: var(--text-dim);
  font-size: 15px;
}

.ic {
  width: 1em;
  height: 1em;
  display: inline-block;
  vertical-align: -0.125em;
  flex: none;
}

/* ---------- shared bits ---------- */

.mono-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  font-weight: 500;
}

.eyebrow {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 10px;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 22px 2px 10px;
}

.pill {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  padding: 3px 9px;
  border-radius: 999px;
  border: 1px solid var(--green);
  color: var(--green);
  background: var(--green-soft);
}

.chip {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  padding: 5px 9px;
  border-radius: 8px;
  background: var(--card-alt);
  color: var(--text-dim);
  margin: 0 5px 5px 0;
}

/* dashed segmented progress */
.dash-bar {
  display: flex;
  gap: 4px;
  margin: 12px 0 8px;
}

.dash {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--accent-soft);
}

.dash.on {
  background: var(--accent);
}

/* ---------- home ---------- */

.home-icon {
  color: var(--accent);
  font-size: 26px;
  line-height: 1;
  margin-bottom: 14px;
}

.home-title {
  font-family: var(--font-serif);
  font-size: 26px;
  font-weight: 700;
  line-height: 1.22;
  letter-spacing: -0.01em;
  margin: 0 0 10px;
}

.home-subtitle {
  font-size: 14.5px;
  color: var(--text-dim);
  line-height: 1.55;
  margin-bottom: 20px;
}

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

.profile-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 14px;
}

.profile-avatar {
  flex: none;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  font-size: 22px;
}

.profile-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 16px;
}

.profile-level {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--accent);
  margin-top: 2px;
}

.profile-xp {
  margin-left: auto;
  text-align: right;
}

.profile-xp-num {
  font-family: var(--font-serif);
  font-size: 22px;
  font-weight: 700;
  line-height: 1;
}

.profile-xp-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.1em;
  color: var(--text-faint);
  margin-top: 3px;
}

.xp-bar-track {
  height: 7px;
  border-radius: 4px;
  background: var(--accent-soft);
  overflow: hidden;
  margin-bottom: 8px;
}

.xp-bar-fill {
  height: 100%;
  border-radius: 4px;
  background: var(--accent);
  transition: width 0.5s ease;
}

.xp-next-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.04em;
  color: var(--text-dim);
  margin-bottom: 16px;
}

.stat-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.stat-tile {
  background: var(--card-alt);
  border-radius: 12px;
  padding: 11px 6px;
  text-align: center;
}

.stat-num {
  font-family: var(--font-serif);
  font-size: 17px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 5px;
}

.stat-num .ic {
  color: var(--accent);
  font-size: 14px;
}

.stat-label {
  font-family: var(--font-mono);
  font-size: 9px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-top: 4px;
}

/* ---------- achievements ---------- */

.ach-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 8px;
}

.ach-tile {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 12px 6px 10px;
  text-align: center;
}

.ach-tile.earned {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.ach-icon {
  font-size: 24px;
  color: var(--text-faint);
  margin-bottom: 7px;
  display: flex;
  justify-content: center;
}

.ach-tile.earned .ach-icon {
  color: var(--accent);
}

.ach-title {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.03em;
  line-height: 1.3;
  color: var(--text-faint);
}

.ach-tile.earned .ach-title {
  color: var(--text);
}

/* ---------- info card ---------- */

.info-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px;
  font-size: 14px;
  line-height: 1.6;
  color: var(--text-dim);
}

.info-card b {
  color: var(--text);
  font-weight: 600;
}

.info-step {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--accent);
  margin-right: 7px;
}

.info-row {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
}

/* ---------- course cards ---------- */

.course-card {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 12px;
}

.course-card.locked {
  opacity: 0.45;
}

.course-head {
  display: flex;
  align-items: center;
  gap: 9px;
  margin-bottom: 8px;
}

.course-head .ic {
  color: var(--accent);
  font-size: 20px;
}

.course-title {
  font-family: var(--font-serif);
  font-size: 20px;
  font-weight: 700;
  letter-spacing: -0.01em;
}

.course-desc {
  font-size: 13.5px;
  line-height: 1.55;
  color: var(--text-dim);
  margin: 10px 0 12px;
}

.course-desc b {
  color: var(--text);
  font-weight: 600;
}

.course-status {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.06em;
  color: var(--accent);
  margin-bottom: 14px;
}

.course-status.done {
  color: var(--green);
}

/* ---------- lesson list ---------- */

.module-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin: 20px 2px 9px;
}

.lesson-card {
  display: flex;
  align-items: center;
  gap: 12px;
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 13px 14px;
  margin-bottom: 8px;
  cursor: pointer;
}

.lesson-card:active {
  background: var(--card-alt);
}

.lesson-check {
  flex: none;
  width: 27px;
  height: 27px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-alt);
  color: var(--text-faint);
  border: 1px solid var(--card-border);
  font-family: var(--font-mono);
  font-size: 11px;
}

.lesson-check.done {
  background: var(--text);
  color: var(--bg);
  border-color: var(--text);
  font-size: 14px;
}

.lesson-body {
  flex: 1;
  min-width: 0;
}

.lesson-title {
  font-size: 14.5px;
  font-weight: 600;
  margin-bottom: 1px;
}

.lesson-summary {
  font-size: 12.5px;
  color: var(--text-dim);
}

.lesson-min {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-faint);
  flex: none;
}

.test-card {
  background: var(--accent-soft);
  border-color: var(--accent);
}

/* ---------- lesson detail ---------- */

.back-link {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 14px;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.lesson-breadcrumb {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  color: var(--accent);
  text-transform: uppercase;
  margin-bottom: 8px;
  line-height: 1.5;
}

.lesson-detail-title {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  letter-spacing: -0.015em;
  line-height: 1.22;
  margin: 0 0 5px;
}

.lesson-detail-subtitle {
  font-size: 14px;
  color: var(--text-dim);
  margin-bottom: 18px;
}

.content-block {
  background: var(--card);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 16px;
  margin-bottom: 12px;
}

.content-heading {
  font-family: var(--font-serif);
  font-size: 15.5px;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.content-heading .ic {
  color: var(--accent);
  font-size: 15px;
}

.content-block p {
  font-size: 14.5px;
  line-height: 1.65;
  margin: 0 0 10px;
}

.content-block p:last-child {
  margin-bottom: 0;
}

.content-block ul {
  margin: 0;
  padding-left: 18px;
}

.content-block li {
  font-size: 14.5px;
  line-height: 1.6;
  margin-bottom: 6px;
}

.content-block b {
  color: var(--accent);
  font-weight: 600;
}

.list-items {
  list-style: none;
  margin: 0;
  padding: 0;
}

.list-items li {
  font-size: 14.5px;
  line-height: 1.6;
  margin-bottom: 9px;
  padding-left: 17px;
  position: relative;
}

.list-items li::before {
  content: "";
  position: absolute;
  left: 2px;
  top: 9px;
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: var(--accent);
}

.list-items li:last-child {
  margin-bottom: 0;
}

.prompt-box {
  border-radius: 12px;
  padding: 11px 13px;
  font-family: var(--font-mono);
  font-size: 12.5px;
  line-height: 1.55;
  margin-bottom: 9px;
}

.prompt-label {
  display: block;
  font-size: 9px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 6px;
}

.prompt-weak {
  background: #2b1c18;
  border: 1px solid #4b2d26;
  color: #d2a498;
}
.prompt-weak .prompt-label { color: #c97b68; }

.prompt-strong {
  background: var(--green-soft);
  border: 1px solid #39603a;
  color: #bcd9bd;
}
.prompt-strong .prompt-label { color: var(--green); }

.prompt-note {
  font-size: 13px;
  color: var(--text-dim);
  margin-top: 10px;
  line-height: 1.55;
}

.code-box,
.prompt-ready {
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.7;
  background: #16110e;
  border: 1px solid var(--card-border);
  border-radius: 12px;
  padding: 13px;
  margin: 0;
  color: var(--text-dim);
  white-space: pre;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
}

.prompt-ready {
  white-space: pre-wrap;
  overflow-x: visible;
  color: #bcd9bd;
  background: var(--green-soft);
  border-color: #39603a;
  margin-bottom: 10px;
}

.code-caption {
  font-size: 12.5px;
  color: var(--text-faint);
  margin-top: 9px;
  line-height: 1.5;
}

.prompt-desc {
  font-size: 13px;
  color: var(--text-dim);
  margin-bottom: 10px;
  line-height: 1.5;
}

.copy-btn {
  padding: 11px;
  font-size: 13.5px;
  margin-bottom: 0;
}


.tip-box {
  display: flex;
  gap: 10px;
  border-radius: 14px;
  padding: 13px 14px;
  font-size: 13.5px;
  line-height: 1.6;
  margin-bottom: 12px;
  border-left: 3px solid;
}

.tip-box .ic {
  font-size: 16px;
  margin-top: 1px;
}

.tip-info { background: var(--accent-soft); border-color: var(--accent); }
.tip-info .ic { color: var(--accent); }
.tip-warning { background: #35211a; border-color: var(--red); }
.tip-warning .ic { color: var(--red); }
.tip-success { background: var(--green-soft); border-color: var(--green); }
.tip-success .ic { color: var(--green); }
.tip-note { background: var(--card-alt); border-color: var(--text-faint); color: var(--text-dim); }
.tip-note .ic { color: var(--text-faint); }

.takeaway {
  background: linear-gradient(180deg, var(--accent-soft), var(--card));
  border: 1px solid var(--accent);
  border-radius: 16px;
  padding: 15px;
  margin: 16px 0 18px;
}

.takeaway-label {
  font-family: var(--font-mono);
  font-size: 9.5px;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 7px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.takeaway-text {
  font-family: var(--font-serif);
  font-size: 15.5px;
  line-height: 1.5;
}

.lesson-done-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px;
  margin-bottom: 10px;
  border-radius: 14px;
  background: var(--green-soft);
  border: 1px solid var(--green);
  color: var(--green);
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

/* ---------- buttons ---------- */

.btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  border: none;
  border-radius: 14px;
  padding: 15px;
  font-family: var(--font-sans);
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  margin-bottom: 10px;
}

.btn-primary {
  background: var(--green);
  color: #16240f;
}

.btn-accent {
  background: var(--accent);
  color: var(--accent-text);
}

.btn-secondary {
  background: var(--card-alt);
  color: var(--text);
  border: 1px solid var(--card-border);
}

.btn-ghost {
  background: transparent;
  color: var(--text-dim);
  border: 1px solid var(--card-border);
}

/* ---------- quiz ---------- */

.quiz-progress {
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
  margin-bottom: 12px;
}

.quiz-question {
  font-family: var(--font-serif);
  font-size: 19px;
  font-weight: 700;
  margin-bottom: 18px;
  line-height: 1.35;
}

.quiz-option {
  display: block;
  width: 100%;
  text-align: left;
  background: var(--card);
  color: var(--text);
  border: 1px solid var(--card-border);
  border-radius: 14px;
  padding: 14px;
  font-family: var(--font-sans);
  font-size: 14.5px;
  line-height: 1.45;
  margin-bottom: 9px;
  cursor: pointer;
}

.quiz-option.selected {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.quiz-option.correct {
  border-color: var(--green);
  background: var(--green-soft);
  color: #cfe6c9;
}

.quiz-option.wrong {
  border-color: var(--red);
  background: #35211a;
  color: #eab5a7;
}

.quiz-option:disabled {
  cursor: default;
  opacity: 1;
}

.answer-box {
  border-radius: 14px;
  padding: 14px;
  margin: 14px 0 12px;
  border-left: 3px solid;
}

.answer-box.ok {
  background: var(--green-soft);
  border-color: var(--green);
}

.answer-box.no {
  background: #35211a;
  border-color: var(--red);
}

.answer-verdict {
  display: flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  margin-bottom: 8px;
}

.answer-box.ok .answer-verdict { color: var(--green); }
.answer-box.no .answer-verdict { color: var(--red); }

.answer-explain {
  font-size: 14px;
  line-height: 1.6;
  color: var(--text);
}

.lesson-card.locked {
  opacity: 0.5;
  cursor: default;
}

.lesson-card.locked .lesson-check {
  color: var(--text-faint);
}

.test-result-badge {
  font-family: var(--font-serif);
  font-size: 24px;
  font-weight: 700;
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.test-result-badge.pass { color: var(--green); }
.test-result-badge.fail { color: var(--red); }

.test-result-sub {
  font-size: 14.5px;
  color: var(--text-dim);
  margin-bottom: 24px;
  line-height: 1.6;
}

/* ---------- toast ---------- */

.toast-wrap {
  position: fixed;
  top: 12px;
  left: 16px;
  right: 16px;
  z-index: 50;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.toast {
  display: flex;
  align-items: center;
  gap: 9px;
  background: var(--accent);
  color: var(--accent-text);
  border-radius: 14px;
  padding: 13px 15px;
  font-size: 13.5px;
  font-weight: 600;
  box-shadow: 0 10px 28px rgba(0, 0, 0, 0.4);
  animation: toast-in 0.25s ease, toast-out 0.3s ease 2.7s forwards;
}

.toast .ic { font-size: 18px; }

@keyframes toast-in {
  from { transform: translateY(-14px); opacity: 0; }
  to { transform: translateY(0); opacity: 1; }
}

@keyframes toast-out {
  to { transform: translateY(-14px); opacity: 0; }
}