:root {
  --academy-ink: #10261f;
  --academy-green: #1f6b4f;
  --academy-green-dark: #174d3b;
  --academy-mint: #e8f3ed;
  --academy-warm: #fbf8f1;
  --academy-line: #dbe5df;
  --academy-muted: #5f6f68;
}

html { scroll-behavior: smooth; }
body { color: var(--academy-ink); }
body .promo-rail { display: none !important; }
.academy-nav-current { color: var(--green); font-weight: 800; }
.academy-subnav .subnav-scroll { gap: 8px; }
.academy-subnav a { white-space: nowrap; }
.academy-kicker, .section-kicker, .card-label {
  display: block;
  color: var(--academy-green);
  font: 800 12px/1.3 Sora, sans-serif;
  letter-spacing: .12em;
  text-transform: uppercase;
}

.academy-hero {
  background:
    radial-gradient(circle at 88% 18%, rgba(143,211,182,.28), transparent 28rem),
    linear-gradient(135deg, #f9f6ed 0%, #eef7f2 100%);
  border-bottom: 1px solid var(--academy-line);
  padding: 70px 0;
}
.academy-hero-grid, .phase-hero-grid {
  display: grid;
  grid-template-columns: minmax(0, 1.55fr) minmax(280px, .75fr);
  gap: 48px;
  align-items: center;
}
.academy-hero h1, .phase-hero h1 {
  max-width: 780px;
  margin: 12px 0 18px;
  color: var(--academy-ink);
  font-size: clamp(36px, 5vw, 64px);
  line-height: 1.05;
  letter-spacing: -.04em;
}
.academy-hero p, .phase-hero p {
  max-width: 720px;
  color: var(--academy-muted);
  font-size: 18px;
  line-height: 1.75;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 28px; }
.hero-roadmap, .outcome-card {
  padding: 28px;
  border: 1px solid rgba(31,107,79,.16);
  border-radius: 22px;
  background: rgba(255,255,255,.86);
  box-shadow: 0 18px 50px rgba(16,38,31,.08);
}
.hero-roadmap strong { font: 800 18px Sora, sans-serif; }
.hero-roadmap ol { margin: 18px 0 0; padding-left: 24px; color: var(--academy-muted); }
.hero-roadmap li { padding: 8px 0 8px 6px; }

.continue-section {
  display: grid;
  grid-template-columns: 1.3fr .7fr;
  gap: 20px;
  margin-top: -30px;
  position: relative;
  z-index: 2;
}
.continue-card, .overall-card, .preference-card, .phase-summary {
  border: 1px solid var(--academy-line);
  border-radius: 20px;
  background: #fff;
  box-shadow: 0 14px 34px rgba(16,38,31,.07);
}
.continue-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  padding: 26px;
}
.continue-card h2 { margin: 7px 0 4px; font-size: 22px; }
.continue-card p { margin: 0; color: var(--academy-muted); }
.overall-card { display: grid; grid-template-columns: 1fr auto; gap: 12px 18px; padding: 26px; }
.overall-card strong { display: block; margin-top: 7px; }
.overall-meter { height: 10px; overflow: hidden; border-radius: 999px; background: #edf1ef; align-self: center; }
.overall-meter span, .phase-progress span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, var(--academy-green), #52a77f); }

.preference-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 34px; }
.preference-card { padding: 24px; }
.preference-card label { display: block; margin-bottom: 10px; font: 800 17px Sora, sans-serif; }
.preference-card select { width: 100%; min-height: 48px; border: 1px solid var(--academy-line); border-radius: 12px; background: #fff; padding: 0 14px; color: var(--academy-ink); font: 600 15px Inter, sans-serif; }
.preference-card p { margin: 9px 0 0; color: var(--academy-muted); font-size: 13px; }

.academy-section-head { display: flex; align-items: end; justify-content: space-between; gap: 28px; margin: 70px 0 24px; }
.academy-section-head h2 { margin: 7px 0 0; font-size: clamp(28px, 4vw, 40px); letter-spacing: -.025em; }
.academy-section-head > p { max-width: 540px; margin: 0; color: var(--academy-muted); line-height: 1.65; }
.phase-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 22px; }
.phase-card {
  display: flex;
  min-width: 0;
  flex-direction: column;
  padding: 28px;
  border: 1px solid var(--academy-line);
  border-radius: 22px;
  background: #fff;
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.phase-card:hover { transform: translateY(-3px); border-color: #b9d5c7; box-shadow: 0 18px 38px rgba(16,38,31,.08); }
.phase-card-top, .phase-card-foot, .phase-meta { display: flex; align-items: center; justify-content: space-between; gap: 12px; }
.phase-number { display: inline-flex; align-items: center; min-height: 30px; padding: 0 12px; border-radius: 999px; background: var(--academy-mint); color: var(--academy-green-dark); font: 800 12px Sora, sans-serif; }
.phase-status, .phase-percent { color: var(--academy-muted); font-size: 12px; font-weight: 700; }
.phase-card h3 { margin: 20px 0 10px; font-size: 25px; }
.phase-card > p { flex: 1; margin: 0; color: var(--academy-muted); line-height: 1.65; }
.phase-meta { justify-content: flex-start; margin-top: 22px; color: var(--academy-muted); font-size: 13px; font-weight: 700; }
.phase-meta span + span::before { content: "•"; margin-right: 12px; color: #a6b4ae; }
.phase-progress { height: 8px; margin: 18px 0 14px; overflow: hidden; border-radius: 999px; background: #edf1ef; }
.phase-card-foot .btn { min-height: 44px; }

.quick-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 18px; }
.quick-card { min-width: 0; padding: 24px; border: 1px solid var(--academy-line); border-radius: 18px; background: var(--academy-warm); }
.quick-card > span { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; background: var(--academy-mint); color: var(--academy-green); font-size: 22px; }
.quick-card h3 { margin: 18px 0 8px; font-size: 18px; }
.quick-card p { min-height: 68px; margin: 0 0 14px; color: var(--academy-muted); font-size: 14px; line-height: 1.6; }
.quick-card small { color: var(--academy-green); font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.faq-preview, .related-guides { padding-bottom: 8px; }
.academy-promo { margin-top: 70px; }

.academy-breadcrumb { display: flex; flex-wrap: wrap; gap: 9px; padding: 24px 0; color: var(--academy-muted); font-size: 13px; }
.academy-breadcrumb a { color: var(--academy-green); font-weight: 700; }
.phase-hero { padding: 50px 0 60px; background: linear-gradient(135deg, #f9f6ed, #edf7f1); border-block: 1px solid var(--academy-line); }
.phase-number.large { min-height: 34px; padding: 0 14px; }
.phase-facts { display: flex; flex-wrap: wrap; gap: 12px; margin-top: 25px; }
.phase-facts span { padding: 11px 14px; border: 1px solid var(--academy-line); border-radius: 12px; background: rgba(255,255,255,.75); color: var(--academy-muted); font-size: 13px; }
.phase-facts b { color: var(--academy-ink); }
.outcome-card h2 { margin: 0 0 14px; font-size: 20px; }
.outcome-card ul { margin: 0; padding-left: 20px; color: var(--academy-muted); }
.outcome-card li { padding: 7px 0; line-height: 1.5; }
.phase-summary { display: grid; grid-template-columns: 1fr 1fr auto; align-items: center; gap: 28px; margin-top: 28px; padding: 24px 28px; }
.phase-summary p { margin: 7px 0 0; color: var(--academy-muted); line-height: 1.55; }
.phase-progress.large { margin: 9px 0 0; }
.lesson-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.lesson-card { display: grid; grid-template-columns: auto minmax(0, 1fr) auto; align-items: center; gap: 16px; padding: 19px; border: 1px solid var(--academy-line); border-radius: 16px; background: #fff; }
.lesson-index { display: grid; width: 42px; height: 42px; place-items: center; border-radius: 12px; background: var(--academy-mint); color: var(--academy-green); font: 800 13px Sora, sans-serif; }
.lesson-card h3 { margin: 0; font-size: 16px; line-height: 1.35; }
.lesson-card p { margin: 5px 0 0; color: var(--academy-muted); font-size: 12px; }
.lesson-state { padding: 6px 9px; border-radius: 999px; background: #f0f2f1; color: var(--academy-muted); font-size: 11px; font-weight: 800; }
.phase-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 48px; }
.phase-nav-link { display: flex; min-height: 92px; flex-direction: column; justify-content: center; padding: 20px 24px; border: 1px solid var(--academy-line); border-radius: 18px; color: var(--academy-ink); background: #fff; }
.phase-nav-link span { color: var(--academy-muted); font-size: 12px; text-transform: uppercase; letter-spacing: .08em; }
.phase-nav-link strong { margin-top: 7px; font: 800 15px/1.4 Sora, sans-serif; }
.phase-nav-link.next { text-align: right; }
.phase-nav-link:hover { border-color: #9fc9b5; background: var(--academy-mint); }
.wa-float span { font-size: 25px; line-height: 1; }

.lesson-shell { display: grid; grid-template-columns: 270px minmax(0, 1fr); gap: 36px; align-items: start; }
.lesson-sidebar {
  position: sticky;
  top: 18px;
  max-height: calc(100vh - 36px);
  overflow: auto;
  border: 1px solid var(--academy-line);
  border-radius: 18px;
  background: #fff;
}
.lesson-sidebar-title { padding: 17px 18px; border-bottom: 1px solid var(--academy-line); font: 800 13px Sora, sans-serif; }
.lesson-sidebar a, .mobile-course-contents nav a {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 9px;
  padding: 11px 15px;
  border-bottom: 1px solid #edf1ef;
  color: var(--academy-muted);
  font-size: 12px;
  line-height: 1.35;
}
.lesson-sidebar a[aria-current="page"], .mobile-course-contents a[aria-current="page"] { color: var(--academy-green-dark); background: var(--academy-mint); font-weight: 800; }
.lesson-sidebar a span, .mobile-course-contents a span { color: var(--academy-green); font-weight: 800; }
.lesson-main { min-width: 0; max-width: 820px; }
.mobile-course-contents { display: none; margin-bottom: 20px; border: 1px solid var(--academy-line); border-radius: 14px; background: #fff; }
.mobile-course-contents summary { padding: 15px; color: var(--academy-green-dark); font-weight: 800; cursor: pointer; }
.lesson-header { padding: 38px; border-radius: 22px; background: linear-gradient(135deg, #f9f6ed, #eaf5ef); }
.lesson-header h1 { margin: 18px 0 16px; font-size: clamp(34px, 5vw, 52px); line-height: 1.08; letter-spacing: -.035em; }
.lesson-objective { color: var(--academy-muted); font-size: 17px; line-height: 1.65; }
.lesson-time { display: inline-block; margin-top: 14px; padding: 9px 12px; border: 1px solid var(--academy-line); border-radius: 10px; background: rgba(255,255,255,.7); font-size: 13px; }
.lesson-section { margin-top: 24px; padding: 30px; border: 1px solid var(--academy-line); border-radius: 18px; background: #fff; }
.lesson-section h2 { margin: 0 0 18px; font-size: 24px; }
.lesson-section p, .lesson-section li { color: var(--academy-muted); line-height: 1.75; }
.lesson-section p:last-child { margin-bottom: 0; }
.concept-flow { display: grid; grid-template-columns: repeat(4, 1fr); gap: 12px; }
.concept-flow > div { padding: 16px; border-radius: 14px; background: var(--academy-mint); }
.concept-flow span { display: grid; width: 28px; height: 28px; place-items: center; margin-bottom: 12px; border-radius: 50%; color: #fff; background: var(--academy-green); font-weight: 800; }
.concept-flow b, .concept-flow small { display: block; }
.concept-flow small { margin-top: 7px; color: var(--academy-muted); line-height: 1.45; }
.chart-note { margin-top: 16px !important; padding: 12px 14px; border-left: 3px solid var(--academy-green); background: #f8faf9; font-size: 13px; }
.worked-list { margin: 0; padding-left: 24px; }
.worked-list li { padding: 7px 0 7px 5px; }
.lesson-split { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.rule-box { border-color: #b9dbc9; background: #f7fbf9; }
.mistake-box { border-color: #ead1c8; background: #fff9f6; }
.practice-block { background: var(--academy-warm); }
.practice-check { display: flex; gap: 10px; align-items: flex-start; margin-top: 18px; padding: 14px; border-radius: 12px; background: #fff; color: var(--academy-ink); font-weight: 700; line-height: 1.5; }
.practice-check input { width: 20px; height: 20px; margin-top: 1px; accent-color: var(--academy-green); }
.mini-quiz fieldset { border: 0; margin: 0; padding: 0; }
.mini-quiz legend { margin-bottom: 14px; font-weight: 800; }
.mini-quiz label { display: flex; gap: 10px; margin: 9px 0; padding: 12px; border: 1px solid var(--academy-line); border-radius: 10px; color: var(--academy-muted); }
.mini-quiz input { margin-top: 3px; accent-color: var(--academy-green); }
.quiz-check { margin-top: 12px; }
.quiz-feedback { min-height: 24px; font-weight: 700; }
.quiz-feedback.correct { color: var(--academy-green); }
.quiz-feedback.incorrect { color: #9d3d2c; }
.lesson-complete { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-top: 24px; padding: 24px; border-radius: 18px; color: #fff; background: var(--academy-ink); }
.lesson-complete strong { display: block; margin-top: 6px; }
.lesson-complete .card-label { color: #8fd3b6; }
.mark-complete.is-complete { background: #75c897; }
.lesson-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; margin-top: 22px; }
.lesson-navigation a { display: flex; min-height: 60px; align-items: center; padding: 14px 18px; border: 1px solid var(--academy-line); border-radius: 14px; color: var(--academy-green-dark); background: #fff; font-weight: 800; }
.lesson-next { justify-content: flex-end; text-align: right; }

.tool-hero { padding: 52px 0; border-block: 1px solid var(--academy-line); background: linear-gradient(135deg, #f9f6ed, #edf7f1); }
.tool-hero.compact { padding: 40px 0; }
.tool-hero h1 { margin: 9px 0 12px; font-size: clamp(36px, 5vw, 56px); letter-spacing: -.035em; }
.tool-hero p { max-width: 740px; color: var(--academy-muted); font-size: 17px; line-height: 1.7; }
.practice-grid { margin-top: 34px; }
a.quick-card { display: block; color: var(--academy-ink); transition: transform .2s ease, border-color .2s ease; }
a.quick-card:hover { transform: translateY(-3px); border-color: #a9cdbc; }
.activity-shell { display: grid; grid-template-columns: minmax(0, 1fr) 310px; gap: 24px; margin-top: 34px; }
.activity-panel, .activity-note, .dictation-filter-card, .player-shell, .simulator-shell, .progress-detail {
  padding: 30px;
  border: 1px solid var(--academy-line);
  border-radius: 20px;
  background: #fff;
}
.activity-panel h2, .activity-note h2 { margin-top: 0; }
.activity-panel li, .activity-note li { padding: 7px 0; color: var(--academy-muted); line-height: 1.6; }
.activity-timer { display: flex; flex-wrap: wrap; align-items: center; gap: 10px; margin: 24px 0; padding: 18px; border-radius: 14px; background: var(--academy-mint); }
.timer-display { margin-right: auto; font: 800 28px "JetBrains Mono", monospace; }
.activity-feedback { color: var(--academy-green); font-weight: 800; }
.filter-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 14px; }
.filter-grid label, .sim-config label { color: var(--academy-ink); font-weight: 800; }
.filter-grid select, .sim-config select { display: block; width: 100%; min-height: 46px; margin-top: 8px; padding: 0 12px; border: 1px solid var(--academy-line); border-radius: 10px; background: #fff; }
.audio-empty { padding: 54px 20px; text-align: center; }
.audio-empty > span { display: block; font-size: 50px; }
.audio-empty h2 { margin: 16px 0 10px; }
.audio-empty p { max-width: 680px; margin: 0 auto 22px; color: var(--academy-muted); line-height: 1.65; }
.player-controls { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin: 24px 0; }
.player-controls button, .player-controls select { min-height: 42px; }
.simulator-shell { margin-top: 34px; }
.sim-steps { display: grid; grid-template-columns: repeat(6, 1fr); overflow: hidden; border: 1px solid var(--academy-line); border-radius: 12px; }
.sim-steps span { padding: 12px 8px; color: var(--academy-muted); background: #f6f8f7; text-align: center; font-size: 12px; font-weight: 800; }
.sim-steps .active { color: #fff; background: var(--academy-green); }
.sim-config { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; max-width: 760px; margin: 30px auto 0; }
.sim-notice { grid-column: 1 / -1; padding: 18px; border: 1px solid #efd6a9; border-radius: 12px; background: #fff8e9; }
.sim-notice p { margin-bottom: 0; color: var(--academy-muted); line-height: 1.6; }
.progress-dashboard { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; margin-top: 34px; }
.progress-dashboard article { padding: 24px; border: 1px solid var(--academy-line); border-radius: 18px; background: #fff; }
.progress-dashboard strong { display: block; margin-top: 10px; font: 800 24px Sora, sans-serif; }
.progress-dashboard p, .progress-dashboard a { color: var(--academy-muted); font-size: 13px; line-height: 1.5; }
.progress-dashboard a { color: var(--academy-green); font-weight: 800; }
.progress-detail { margin-top: 24px; }
.progress-row { display: grid; grid-template-columns: 260px minmax(0, 1fr) 48px; align-items: center; gap: 18px; padding: 16px 0; border-bottom: 1px solid var(--academy-line); }
.progress-row b, .progress-row span { display: block; }
.progress-row span { margin-top: 4px; color: var(--academy-muted); font-size: 12px; }
.progress-note { margin-top: 24px; padding: 18px; border-radius: 12px; background: var(--academy-mint); }
.progress-note p { margin-bottom: 0; color: var(--academy-muted); }

@media (max-width: 900px) {
  .academy-hero-grid, .phase-hero-grid { grid-template-columns: 1fr; gap: 28px; }
  .academy-hero { padding: 50px 0 64px; }
  .continue-section { grid-template-columns: 1fr; }
  .phase-summary { grid-template-columns: 1fr 1fr; }
  .phase-summary .btn { grid-column: 1 / -1; justify-content: center; }
  .quick-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .lesson-shell { grid-template-columns: 1fr; }
  .lesson-sidebar { display: none; }
  .mobile-course-contents { display: block; }
  .concept-flow { grid-template-columns: 1fr 1fr; }
  .activity-shell { grid-template-columns: 1fr; }
  .filter-grid { grid-template-columns: 1fr 1fr; }
  .progress-dashboard { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 640px) {
  .academy-hero { padding: 38px 0 58px; }
  .academy-hero h1, .phase-hero h1 { font-size: 36px; }
  .academy-hero p, .phase-hero p { font-size: 16px; line-height: 1.65; }
  .hero-roadmap, .outcome-card { padding: 22px; }
  .continue-section { margin-top: -24px; }
  .continue-card { align-items: stretch; flex-direction: column; padding: 22px; }
  .continue-card .btn { justify-content: center; }
  .preference-grid, .phase-grid, .quick-grid, .lesson-grid, .phase-navigation, .phase-summary { grid-template-columns: 1fr; }
  .academy-section-head { align-items: start; flex-direction: column; margin-top: 52px; }
  .phase-card { padding: 22px; }
  .phase-card-foot { align-items: stretch; flex-direction: column; }
  .phase-card-foot .btn { justify-content: center; }
  .quick-card p { min-height: 0; }
  .phase-hero { padding: 38px 0 48px; }
  .phase-summary { padding: 22px; }
  .phase-summary .btn { grid-column: auto; }
  .lesson-card { grid-template-columns: auto minmax(0, 1fr); }
  .lesson-state { grid-column: 2; justify-self: start; }
  .phase-nav-link.next { text-align: left; }
  .lesson-header, .lesson-section { padding: 22px; }
  .lesson-split, .lesson-navigation, .concept-flow, .filter-grid, .sim-config, .progress-dashboard { grid-template-columns: 1fr; }
  .lesson-complete { align-items: stretch; flex-direction: column; }
  .lesson-complete .btn { justify-content: center; }
  .lesson-next { justify-content: flex-start; text-align: left; }
  .sim-steps { grid-template-columns: repeat(2, 1fr); }
  .sim-notice { grid-column: auto; }
  .progress-row { grid-template-columns: 1fr; gap: 9px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .phase-card { transition: none; }
}