:root {
  --bg: #0a0e14;
  --panel: #111722;
  --panel-2: #171f2e;
  --border: rgba(255, 255, 255, 0.07);
  --border-strong: rgba(255, 255, 255, 0.14);
  --text: #eef1f6;
  --text-muted: #8a94a8;
  --text-dim: #59637a;
  --up: #ff4d5e;
  --up-soft: rgba(255, 77, 94, 0.12);
  --down: #3d8bff;
  --gold: #ffd166;
  --green: #34d399;
  --radius-sm: 10px;
  --radius-md: 16px;
  --radius-lg: 22px;
  --font: "Noto Sans KR", system-ui, sans-serif;
  --mono: "IBM Plex Mono", monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  height: 100%;
  scroll-behavior: smooth;
}

body {
  min-height: 100%;
  font-family: var(--font);
  background:
    radial-gradient(ellipse 60% 40% at 80% -10%, rgba(61, 139, 255, 0.1), transparent),
    radial-gradient(ellipse 50% 40% at 10% 110%, rgba(255, 77, 94, 0.07), transparent),
    var(--bg);
  color: var(--text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

.app {
  width: min(920px, calc(100% - 32px));
  margin: 0 auto;
  min-height: 100vh;
  padding: 18px 0 56px;
}

.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 6px 4px 24px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark {
  width: 34px;
  height: 34px;
  display: grid;
  place-items: center;
  border-radius: 10px;
  background: linear-gradient(135deg, var(--up), #ff7a3d);
  color: #fff;
}

.logo-text {
  font-weight: 900;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.topbar-tag {
  font-family: var(--mono);
  font-size: 0.62rem;
  letter-spacing: 0.14em;
  color: var(--text-dim);
}

.hero {
  margin-bottom: 28px;
}

.eyebrow {
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.16em;
  color: var(--gold);
  margin-bottom: 10px;
}

.hero h1 {
  font-size: clamp(1.75rem, 4vw, 2.35rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1.25;
  margin-bottom: 12px;
}

.hero h1 em {
  font-style: normal;
  color: var(--down);
}

.hero-desc {
  color: var(--text-muted);
  max-width: 62ch;
  font-size: 0.98rem;
}

.stats-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin: 24px 0 32px;
}

.stat-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 16px 18px;
}

.stat-label {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin-bottom: 4px;
}

.stat-value {
  font-family: var(--mono);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
}

.stat-value span {
  font-size: 0.82rem;
  color: var(--text-muted);
  font-weight: 500;
}

.section-title {
  font-size: 0.78rem;
  font-family: var(--mono);
  letter-spacing: 0.12em;
  color: var(--text-dim);
  margin-bottom: 14px;
}

.module-list {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.module-card {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.module-header {
  width: 100%;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 22px;
  background: transparent;
  border: none;
  color: inherit;
  text-align: left;
  cursor: pointer;
  font: inherit;
}

.module-header:hover {
  background: rgba(255, 255, 255, 0.02);
}

.module-header-left {
  flex: 1;
  min-width: 0;
}

.module-badge {
  display: inline-block;
  font-family: var(--mono);
  font-size: 0.65rem;
  letter-spacing: 0.1em;
  padding: 4px 8px;
  border-radius: 6px;
  margin-bottom: 8px;
}

.module-badge--0 { background: rgba(138, 148, 168, 0.15); color: #b8c0d0; }
.module-badge--1 { background: rgba(52, 211, 153, 0.12); color: var(--green); }
.module-badge--2 { background: rgba(61, 139, 255, 0.12); color: var(--down); }
.module-badge--3 { background: rgba(255, 77, 94, 0.12); color: var(--up); }
.module-badge--4 { background: rgba(255, 209, 102, 0.12); color: var(--gold); }
.module-badge--5 { background: rgba(167, 139, 250, 0.12); color: #a78bfa; }
.module-badge--6 { background: rgba(52, 211, 153, 0.12); color: #6ee7b7; }
.module-badge--7 { background: rgba(251, 146, 60, 0.12); color: #fb923c; }
.module-badge--8 { background: rgba(244, 114, 182, 0.12); color: #f472b6; }

.module-title {
  font-size: 1.08rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.module-meta {
  font-size: 0.84rem;
  color: var(--text-muted);
}

.module-toggle {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  border: 1px solid var(--border);
  color: var(--text-dim);
  transition: transform 0.2s ease;
}

.module-card.is-open .module-toggle {
  transform: rotate(180deg);
}

.module-body {
  display: none;
  border-top: 1px solid var(--border);
  padding: 8px 12px 14px;
}

.module-card.is-open .module-body {
  display: block;
}

.lesson-list {
  list-style: none;
}

.lesson-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 10px;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
}

.lesson-item + .lesson-item {
  border-top: 1px solid var(--border);
  border-radius: 0;
}

.lesson-item:first-child {
  margin-top: 4px;
}

.lesson-num {
  flex-shrink: 0;
  width: 32px;
  height: 32px;
  display: grid;
  place-items: center;
  font-family: var(--mono);
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--panel-2);
  border-radius: 8px;
}

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

.lesson-title {
  font-size: 0.94rem;
  font-weight: 600;
  margin-bottom: 2px;
}

.lesson-desc {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.lesson-tag {
  flex-shrink: 0;
  font-size: 0.68rem;
  font-family: var(--mono);
  letter-spacing: 0.06em;
  padding: 4px 8px;
  border-radius: 6px;
  background: rgba(255, 209, 102, 0.1);
  color: var(--gold);
}

.lesson-status {
  flex-shrink: 0;
  font-size: 0.72rem;
  color: var(--text-dim);
  padding: 4px 10px;
  border-radius: 999px;
  border: 1px solid var(--border);
}

.appendix {
  margin-top: 36px;
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 22px;
}

.appendix h2 {
  font-size: 1rem;
  margin-bottom: 14px;
}

.quiz-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 10px;
}

.quiz-chip {
  padding: 12px 14px;
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: 0.84rem;
}

.quiz-chip strong {
  display: block;
  font-size: 0.78rem;
  color: var(--gold);
  margin-bottom: 4px;
}

.footer-note {
  margin-top: 28px;
  padding: 16px 18px;
  border-radius: var(--radius-md);
  border: 1px dashed var(--border-strong);
  color: var(--text-muted);
  font-size: 0.84rem;
}

/* —— 차례: 강의 링크 —— */
.lesson-item--link {
  cursor: pointer;
  transition: background 0.15s ease;
}

.lesson-item--link:hover {
  background: rgba(255, 255, 255, 0.03);
}

.lesson-item--link .lesson-title {
  color: var(--text);
}

.lesson-status--ready {
  color: var(--green);
  border-color: rgba(52, 211, 153, 0.25);
  background: rgba(52, 211, 153, 0.08);
}

/* —— 강의 페이지 —— */
.lesson-app {
  width: min(760px, calc(100% - 32px));
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.86rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  transition: color 0.15s ease;
}

.back-link:hover {
  color: var(--text);
}

.lesson-article {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 28px 30px 24px;
}

.lesson-header {
  margin-bottom: 32px;
  padding-bottom: 24px;
  border-bottom: 1px solid var(--border);
}

.lesson-eyebrow {
  font-size: 0.84rem;
  color: var(--text-muted);
  margin: 10px 0 8px;
}

.lesson-header h1 {
  font-size: clamp(1.5rem, 3.5vw, 2rem);
  font-weight: 900;
  letter-spacing: -0.03em;
  margin-bottom: 14px;
}

.lesson-lead {
  color: var(--text-muted);
  font-size: 0.98rem;
  max-width: 58ch;
}

.lesson-lead strong {
  color: var(--text);
}

.content-section {
  margin-bottom: 32px;
}

.content-section h2 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
  letter-spacing: -0.02em;
}

.content-section p {
  color: var(--text-muted);
  margin-bottom: 12px;
  font-size: 0.95rem;
}

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

.content-note {
  margin-top: 14px !important;
  padding: 12px 14px;
  background: var(--panel-2);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--gold);
  font-size: 0.88rem !important;
}

.info-table-wrap {
  overflow-x: auto;
  margin: 16px 0;
}

.info-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.9rem;
}

.info-table th,
.info-table td {
  padding: 12px 14px;
  text-align: left;
  border-bottom: 1px solid var(--border);
}

.info-table th {
  font-family: var(--mono);
  font-size: 0.72rem;
  letter-spacing: 0.08em;
  color: var(--text-dim);
  background: var(--panel-2);
}

.info-table td code {
  font-family: var(--mono);
  font-size: 0.85rem;
  color: var(--gold);
}

.bullet-list {
  margin-top: 16px;
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.bullet-list li {
  margin-bottom: 8px;
}

.bullet-list strong {
  color: var(--text);
}

.candle-demo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin: 20px 0;
}

.candle-demo-card {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 16px 16px;
  text-align: center;
}

.candle-svg {
  width: 100%;
  max-width: 140px;
  height: auto;
  margin: 0 auto 12px;
  display: block;
}

.candle-demo-card figcaption {
  font-size: 0.82rem;
  color: var(--text-muted);
  line-height: 1.6;
}

.candle-demo-card figcaption strong {
  color: var(--text);
  display: block;
  margin-bottom: 4px;
}

.compare-row {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  margin: 16px 0;
}

.compare-card {
  padding: 18px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
}

.compare-card--up {
  background: var(--up-soft);
  border-color: rgba(255, 77, 94, 0.2);
}

.compare-card--down {
  background: rgba(61, 139, 255, 0.1);
  border-color: rgba(61, 139, 255, 0.2);
}

.compare-label {
  display: block;
  font-family: var(--mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  color: var(--text-dim);
  margin-bottom: 8px;
}

.compare-card p {
  font-size: 0.9rem !important;
  color: var(--text-muted) !important;
  margin-bottom: 4px !important;
}

.color-up { color: var(--up); }
.color-down { color: var(--down); }

.pattern-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-top: 16px;
}

.pattern-item {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
}

.pattern-item strong {
  display: block;
  font-size: 0.88rem;
  margin: 10px 0 6px;
}

.pattern-item p {
  font-size: 0.8rem !important;
  margin: 0 !important;
}

.mini-candles {
  height: 64px;
  width: 24px;
  margin: 0 auto;
  position: relative;
}

.mini-candle {
  display: block;
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 18px;
  border-radius: 2px;
  top: var(--top);
  height: var(--body);
}

.mini-candle::before,
.mini-candle::after {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 2px;
  background: #8a94a8;
}

.mini-candle::before {
  bottom: 100%;
  height: var(--top-wick, 12px);
}

.mini-candle::after {
  top: 100%;
  height: var(--bottom-wick, 12px);
}

.mini-candle--up {
  background: var(--up);
}

.mini-candle--doji {
  background: var(--gold);
}

.highlight-box {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 20px 22px;
}

.summary-list {
  padding-left: 20px;
  color: var(--text-muted);
  font-size: 0.93rem;
}

.summary-list li {
  margin-bottom: 8px;
}

.lesson-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 8px;
  padding-top: 24px;
  border-top: 1px solid var(--border);
}

.lesson-nav-btn {
  font-size: 0.82rem;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  color: var(--text-muted);
  white-space: nowrap;
}

a.lesson-nav-btn:hover {
  background: rgba(255, 255, 255, 0.04);
  color: var(--text);
}

.lesson-nav-btn--disabled {
  opacity: 0.45;
  cursor: default;
}

/* —— 학습점검 퀴즈 —— */
.quiz-section {
  background: var(--panel-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 22px 22px 20px;
}

.quiz-section > h2 {
  margin-bottom: 6px;
}

.quiz-intro {
  font-size: 0.88rem !important;
  color: var(--text-muted) !important;
  margin-bottom: 18px !important;
}

.quiz-form {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.quiz-item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  margin: 0;
  background: var(--panel);
  transition: border-color 0.15s ease;
}

.quiz-item legend {
  font-size: 0.92rem;
  font-weight: 600;
  color: var(--text);
  padding: 0 4px 10px;
  line-height: 1.45;
}

.quiz-options {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.quiz-option {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 8px;
  border: 1px solid transparent;
  font-size: 0.88rem;
  color: var(--text-muted);
  cursor: pointer;
  transition: background 0.12s ease;
}

.quiz-option:hover {
  background: rgba(255, 255, 255, 0.03);
}

.quiz-option input {
  margin-top: 3px;
  accent-color: var(--down);
}

.quiz-item--correct {
  border-color: rgba(52, 211, 153, 0.35);
}

.quiz-item--wrong {
  border-color: rgba(255, 77, 94, 0.35);
}

.quiz-feedback {
  margin-top: 10px;
  font-size: 0.82rem;
  line-height: 1.5;
}

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

.quiz-feedback--no {
  color: var(--up);
}

.quiz-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 18px;
}

.btn-quiz-check,
.btn-quiz-reset {
  font: inherit;
  font-size: 0.86rem;
  font-weight: 600;
  padding: 11px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border);
  cursor: pointer;
  color: var(--text);
}

.btn-quiz-check {
  background: linear-gradient(135deg, rgba(61, 139, 255, 0.25), rgba(61, 139, 255, 0.12));
  border-color: rgba(61, 139, 255, 0.35);
}

.btn-quiz-check:hover {
  background: linear-gradient(135deg, rgba(61, 139, 255, 0.35), rgba(61, 139, 255, 0.18));
}

.btn-quiz-reset {
  background: transparent;
  color: var(--text-muted);
}

.btn-quiz-reset:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.03);
}

.quiz-score {
  margin-top: 14px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  background: rgba(255, 209, 102, 0.1);
  border: 1px solid rgba(255, 209, 102, 0.25);
  color: var(--gold);
}

.quiz-score--perfect {
  background: rgba(52, 211, 153, 0.1);
  border-color: rgba(52, 211, 153, 0.25);
  color: var(--green);
}

.quiz-result-title {
  font-weight: 700;
  font-size: 0.92rem;
  margin-bottom: 6px;
}

.quiz-result-title--ok { color: var(--green); }
.quiz-result-title--no { color: var(--up); }

.quiz-feedback-correct {
  font-size: 0.86rem;
  color: var(--gold);
  margin-bottom: 6px;
}

.quiz-feedback-detail {
  font-size: 0.84rem;
  color: var(--text-muted);
  line-height: 1.55;
}

.quiz-feedback--hint {
  color: var(--text-dim);
  font-size: 0.82rem;
}

.quiz-item--graded .quiz-option input,
.quiz-item--graded .quiz-visual-option input {
  pointer-events: none;
}

label.quiz-option--is-answer {
  border-color: rgba(52, 211, 153, 0.45) !important;
  background: rgba(52, 211, 153, 0.1) !important;
}

label.quiz-option--picked-wrong {
  border-color: rgba(255, 77, 94, 0.45) !important;
  background: rgba(255, 77, 94, 0.08) !important;
}

label.quiz-option--is-answer::after {
  content: "정답";
  margin-left: auto;
  font-size: 0.68rem;
  font-family: var(--mono);
  color: var(--green);
  letter-spacing: 0.06em;
}

@media (max-width: 640px) {
  .stats-row {
    grid-template-columns: 1fr;
  }

  .module-header {
    padding: 16px 16px;
  }

  .lesson-item {
    flex-wrap: wrap;
  }

  .lesson-status {
    margin-left: 44px;
  }

  .lesson-article {
    padding: 20px 18px 18px;
  }

  .candle-demo-grid,
  .compare-row,
  .pattern-grid {
    grid-template-columns: 1fr;
  }

  .lesson-nav {
    flex-direction: column;
    align-items: stretch;
  }

  .lesson-nav-btn {
    text-align: center;
  }
}