:root {
  --ink: #172832;
  --muted: #60717a;
  --paper: #f7f2e8;
  --paper-2: #fffdf8;
  --navy: #173e4a;
  --teal: #267384;
  --coral: #cf684d;
  --gold: #dba84b;
  --mint: #dceee8;
  --line: rgba(23, 40, 50, .17);
  --shadow: 0 20px 55px rgba(23, 40, 50, .12);
  --radius: 24px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--paper); font-family: Inter, Pretendard, "Noto Sans KR", system-ui, sans-serif; line-height: 1.55; }
button, select, a { font: inherit; }
a { color: inherit; }
button, select { min-height: 46px; }
button:focus-visible, a:focus-visible, summary:focus-visible, select:focus-visible { outline: 3px solid var(--gold); outline-offset: 3px; }
.skip-link { position: fixed; left: 18px; top: -90px; z-index: 100; padding: 12px 18px; color: white; background: var(--navy); border-radius: 10px; }
.skip-link:focus { top: 18px; }

.topbar { position: sticky; top: 0; z-index: 30; min-height: 68px; padding: 10px clamp(16px, 4vw, 60px); display: flex; align-items: center; justify-content: space-between; gap: 18px; color: white; background: rgba(23, 62, 74, .97); border-bottom: 1px solid rgba(255,255,255,.18); }
.brand { display: grid; grid-template-columns: 40px auto; column-gap: 10px; text-decoration: none; align-items: center; }
.brand > span { grid-row: 1 / 3; display: grid; place-items: center; width: 40px; height: 40px; border: 1px solid rgba(255,255,255,.6); border-radius: 50%; font-weight: 900; }
.brand strong { font-size: .78rem; letter-spacing: .18em; }
.brand small { color: rgba(255,255,255,.7); font-size: .62rem; letter-spacing: .1em; }
.topbar nav { display: flex; flex-wrap: wrap; justify-content: center; gap: 6px; }
.topbar nav a, .language-switch button { padding: 9px 11px; color: inherit; background: transparent; border: 1px solid transparent; border-radius: 999px; text-decoration: none; font-size: .72rem; font-weight: 800; letter-spacing: .06em; }
.topbar nav a[aria-current="page"], .topbar nav a:hover, .language-switch button[aria-pressed="true"] { background: rgba(255,255,255,.14); border-color: rgba(255,255,255,.22); }
.language-switch { display: flex; gap: 4px; }
.language-switch button { min-height: 42px; cursor: pointer; }
.language-switch button:disabled, [data-js-control]:disabled { opacity: .48; cursor: not-allowed; }

main { width: min(1440px, calc(100% - 32px)); margin: 0 auto; }
.hero { position: relative; display: grid; grid-template-columns: 110px 1fr 190px; gap: clamp(24px, 4vw, 64px); align-items: center; min-height: 520px; padding: 72px clamp(24px, 4vw, 72px); overflow: hidden; color: white; background: var(--navy); border-radius: 0 0 38px 38px; }
.hero::before { content: ""; position: absolute; inset: auto -12% -55% 35%; height: 130%; background: radial-gradient(circle, rgba(219,168,75,.34), transparent 62%); pointer-events: none; }
.stage-mark { align-self: start; display: grid; color: rgba(255,255,255,.75); }
.stage-mark span, .stage-mark small { font-size: .72rem; font-weight: 900; letter-spacing: .18em; }
.stage-mark strong { color: var(--gold); font-family: Georgia, serif; font-size: clamp(4.8rem, 9vw, 8rem); line-height: .9; }
.hero-copy { position: relative; z-index: 1; }
.hero-copy > p:first-child { margin: 0 0 18px; color: #9bd0d3; font-size: .78rem; font-weight: 900; letter-spacing: .18em; }
.hero h1 { margin: 0; font-family: Georgia, "Noto Serif KR", serif; font-size: clamp(2.4rem, 5vw, 5.2rem); line-height: 1.04; font-weight: 500; }
.hero h1 span, .hero h1 em { display: block; }
.hero h1 em { color: #f5cf80; font-style: normal; }
.hero-copy > p:not(:first-child) { max-width: 770px; margin: 24px 0; color: rgba(255,255,255,.82); font-size: clamp(1rem, 1.4vw, 1.15rem); }
.hero-chips { display: flex; flex-wrap: wrap; gap: 8px; }
.hero-chips span { padding: 8px 12px; background: rgba(255,255,255,.08); border: 1px solid rgba(255,255,255,.16); border-radius: 999px; font-size: .7rem; font-weight: 900; letter-spacing: .07em; }
.boundary-stamp { position: relative; z-index: 1; padding: 22px 16px; text-align: center; color: var(--navy); background: #f7d58f; border: 2px solid rgba(23,62,74,.35); transform: rotate(2deg); box-shadow: 8px 8px 0 rgba(0,0,0,.18); }
.boundary-stamp span, .boundary-stamp small { display: block; font-size: .65rem; font-weight: 900; letter-spacing: .12em; }
.boundary-stamp strong { display: block; margin: 10px 0; font-family: Georgia, serif; font-size: 3rem; line-height: .9; }

.metric-strip { margin: 24px 0 0; display: grid; grid-template-columns: repeat(5, 1fr); border: 1px solid var(--line); border-radius: 18px; background: var(--paper-2); overflow: hidden; }
.metric-strip article { min-height: 110px; padding: 20px; display: grid; align-content: center; border-right: 1px solid var(--line); }
.metric-strip article:last-child { border: 0; }
.metric-strip strong { color: var(--coral); font-family: Georgia, serif; font-size: 2.5rem; line-height: 1; }
.metric-strip span { margin-top: 8px; color: var(--muted); font-size: .78rem; font-weight: 800; }
.validation-bar { margin: 14px 0 56px; padding: 12px 16px; color: white; background: var(--teal); border-radius: 12px; font-size: .78rem; font-weight: 800; letter-spacing: .06em; text-align: center; }
.noscript-note { margin: 18px 0; padding: 16px; background: #fff4cf; border: 1px solid #c18a2f; border-radius: 12px; }

.section-heading { display: grid; grid-template-columns: 180px 1fr; gap: 32px; margin-bottom: 24px; }
.section-heading > p { margin: 8px 0 0; color: var(--coral); font-size: .76rem; font-weight: 900; letter-spacing: .14em; }
.section-heading h2 { margin: 0; font-family: Georgia, "Noto Serif KR", serif; font-size: clamp(2rem, 4vw, 4rem); line-height: 1.08; font-weight: 500; }
.section-heading div > p { max-width: 780px; color: var(--muted); }
.package-directory, .material-master, .rubric-section, .checklist-section, .handoff { margin: 72px 0; }
.directory-grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: 10px; }
.directory-grid a { min-height: 122px; padding: 18px; display: grid; align-content: space-between; background: var(--paper-2); border: 1px solid var(--line); border-radius: 16px; text-decoration: none; }
.directory-grid a:hover { border-color: var(--teal); transform: translateY(-2px); }
.directory-grid span { color: var(--coral); font-weight: 900; }
.directory-grid strong { font-size: .94rem; }
.directory-grid small { color: var(--muted); font-weight: 800; }
.pack-actions, .guide-toolbar, .handoff-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 20px; }
.pack-actions button, .guide-toolbar button, .projector-exit, .handoff-actions a { padding: 11px 16px; color: white; background: var(--navy); border: 0; border-radius: 10px; text-decoration: none; font-weight: 800; cursor: pointer; }
.guide-toolbar button:last-child { color: var(--navy); background: #e7d7b7; }

.guide-stack { display: grid; gap: 18px; }
.teacher-guide { background: var(--paper-2); border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow); overflow: clip; scroll-margin-top: 90px; }
.teacher-guide > summary { min-height: 118px; padding: 24px clamp(18px, 3vw, 34px); display: grid; grid-template-columns: 62px 1fr auto; gap: 20px; align-items: center; cursor: pointer; list-style: none; }
.teacher-guide > summary::-webkit-details-marker { display: none; }
.teacher-guide > summary::after { content: "+"; grid-column: 3; grid-row: 1; font-size: 1.8rem; }
.teacher-guide[open] > summary::after { content: "−"; }
.guide-number { display: grid; place-items: center; width: 58px; height: 58px; color: white; background: var(--coral); border-radius: 50%; font-family: Georgia, serif; font-size: 1.7rem; }
.teacher-guide h2 { margin: 0; font-family: Georgia, "Noto Serif KR", serif; font-size: clamp(1.45rem, 3vw, 2.5rem); font-weight: 500; }
.teacher-guide summary p { margin: 6px 0 0; color: var(--muted); }
.guide-meta { display: flex; flex-direction: column; align-items: end; gap: 5px; padding-right: 30px; font-size: .7rem; font-weight: 900; color: var(--teal); }
.guide-body { padding: 0 clamp(18px, 4vw, 52px) 46px; border-top: 1px solid var(--line); }
.guide-kicker { display: grid; grid-template-columns: 1.15fr 1fr 1fr; gap: 12px; margin: 26px 0; }
.guide-kicker > div { padding: 18px; background: #eef4f1; border-radius: 14px; }
.guide-kicker small, .panel-title, .question-source { display: block; color: var(--coral); font-size: .68rem; font-weight: 900; letter-spacing: .1em; }
.guide-kicker strong, .guide-kicker p { display: block; margin: 7px 0 0; }
.lesson-panel { margin-top: 18px; padding: 24px; border: 1px solid var(--line); border-radius: 18px; }
.lesson-panel > header { display: flex; justify-content: space-between; gap: 18px; margin-bottom: 18px; }
.lesson-panel h3 { margin: 0; font-family: Georgia, "Noto Serif KR", serif; font-size: 1.55rem; font-weight: 500; }
.two-col { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.material-list, .timeline, .question-bank, .look-for-list, .check-list, .safety-list { margin: 0; padding: 0; list-style: none; }
.material-list li, .look-for-list li, .check-list li, .safety-list li { padding: 10px 0; display: grid; grid-template-columns: 88px 1fr; gap: 10px; border-bottom: 1px solid var(--line); }
.material-list li > span, .safety-list li > span { color: var(--teal); font-size: .68rem; font-weight: 900; }
.timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 10px; }
.timeline li { min-height: 180px; padding: 16px; background: #f0e9dc; border-radius: 14px; }
.timeline li > span { color: var(--coral); font-size: .72rem; font-weight: 900; }
.timeline strong, .timeline p { display: block; margin: 7px 0; }
.timeline small { color: var(--muted); }
.level-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; }
.level-grid article { padding: 18px; border-radius: 14px; background: var(--mint); }
.level-grid article:nth-child(2) { background: #f5e5c4; }
.level-grid article:nth-child(3) { background: #eed9d5; }
.level-grid span { font-size: .68rem; font-weight: 900; letter-spacing: .1em; }
.question-bank { display: grid; grid-template-columns: 1fr 1fr; gap: 8px; counter-reset: prompts; }
.question-bank li { position: relative; padding: 14px 14px 14px 46px; background: #f7f3eb; border-radius: 12px; }
.question-bank li::before { counter-increment: prompts; content: counter(prompts, decimal-leading-zero); position: absolute; left: 14px; top: 14px; color: var(--coral); font-weight: 900; }
.question-bank p { margin: 5px 0 0; }
.result-bridge { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.result-bridge article { min-height: 150px; padding: 18px; border-radius: 14px; border: 1px solid var(--line); }
.result-bridge article:first-child { background: #eef4f1; }
.result-bridge article:last-child { background: #f4e5dd; }
.result-bridge b { display: block; color: var(--coral); font-size: 1.2rem; }
.disclosure { margin-top: 12px; padding: 13px; color: #6f431f; background: #fff0cd; border-left: 4px solid var(--gold); }
.support-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.misconception, .teacher-response, .pacing { padding: 18px; border-radius: 14px; }
.misconception { background: #f3dfda; }
.teacher-response { background: #dfece9; }
.pacing { grid-column: 1 / -1; background: #eee7d8; }

.material-table { width: 100%; border-collapse: collapse; background: var(--paper-2); border-radius: 16px; overflow: hidden; }
.material-table th, .material-table td { padding: 13px 14px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: top; }
.material-table th { color: white; background: var(--navy); font-size: .72rem; letter-spacing: .06em; }
.material-table td:first-child { color: var(--coral); font-weight: 900; }
.rubric-intro, .stop-gate { padding: 18px; border-radius: 14px; }
.rubric-intro { background: var(--mint); }
.stop-gate { margin-top: 14px; color: #6e2f25; background: #f5dcd5; border: 2px solid #cf684d; font-weight: 700; }
.rubric-table { width: 100%; margin-top: 18px; border-collapse: collapse; background: var(--paper-2); }
.rubric-table th, .rubric-table td { width: 20%; padding: 13px; border: 1px solid var(--line); vertical-align: top; }
.rubric-table th { color: white; background: var(--navy); }
.rubric-table td:first-child { font-weight: 900; background: #e9efe9; }
.checklist-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.checklist-grid article { padding: 20px; background: var(--paper-2); border: 1px solid var(--line); border-radius: 16px; }
.checklist-grid h3 { margin: 0 0 14px; font-family: Georgia, serif; font-size: 1.7rem; }
.checklist-grid ol { margin: 0; padding-left: 22px; }
.checklist-grid li { padding: 8px 0; }

.handoff { padding: clamp(24px, 5vw, 58px); display: grid; grid-template-columns: 1.3fr 1fr; gap: 30px; color: white; background: var(--navy); border-radius: 28px; }
.handoff h2 { margin: 6px 0 18px; font-family: Georgia, "Noto Serif KR", serif; font-size: clamp(2rem, 4vw, 3.5rem); font-weight: 500; }
.handoff > div > p:first-child { color: #9bd0d3; font-size: .72rem; font-weight: 900; letter-spacing: .12em; }
.handoff ul { margin: 0; padding: 0; list-style: none; }
.handoff li { padding: 12px 0; display: grid; grid-template-columns: 70px 1fr auto; gap: 10px; border-bottom: 1px solid rgba(255,255,255,.18); }
.handoff li span { color: #f5cf80; font-weight: 900; }
.handoff li b { font-size: .7rem; color: #9bd0d3; }
.handoff-actions { grid-column: 1 / -1; }
.handoff-actions a { background: var(--coral); }
.site-footer { margin: 42px 0 20px; padding: 22px; display: flex; justify-content: space-between; gap: 18px; color: var(--muted); border-top: 1px solid var(--line); font-size: .78rem; }
.site-footer div { display: grid; }
.site-footer b { color: var(--coral); }

.projector-exit { display: none; position: fixed; right: 22px; top: 18px; z-index: 70; background: var(--coral); }
body[data-projector="true"] { background: #102730; }
body[data-projector="true"] .topbar, body[data-projector="true"] main > :not(.guide-stack), body[data-projector="true"] .site-footer { display: none; }
body[data-projector="true"] main { width: min(1500px, calc(100% - 40px)); padding-top: 80px; }
body[data-projector="true"] .projector-exit { display: block; }
body[data-projector="true"] .teacher-guide { display: none; }
body[data-projector-guide="01"] [data-guide="01"], body[data-projector-guide="02"] [data-guide="02"], body[data-projector-guide="03"] [data-guide="03"], body[data-projector-guide="04"] [data-guide="04"], body[data-projector-guide="05"] [data-guide="05"], body[data-projector-guide="06"] [data-guide="06"], body[data-projector-guide="07"] [data-guide="07"], body[data-projector-guide="08"] [data-guide="08"], body[data-projector-guide="09"] [data-guide="09"], body[data-projector-guide="10"] [data-guide="10"] { display: block; }

.print-pack { display: none; }
.print-sheet { color: #111; background: white; font-family: Arial, "Noto Sans KR", sans-serif; }
.print-sheet header { display: flex; justify-content: space-between; gap: 10mm; padding-bottom: 4mm; border-bottom: 2px solid #173e4a; }
.print-sheet header h1, .print-sheet header h2 { margin: 0; font-size: 18pt; }
.print-sheet section { break-inside: avoid; }
.print-sheet h3 { margin: 2.5mm 0 1.5mm; font-size: 10pt; color: #173e4a; }
.print-sheet p, .print-sheet li, .print-sheet td, .print-sheet th { font-size: 7.8pt; line-height: 1.35; }
.print-sheet .answer-line { display: block; min-height: 13mm; margin-top: 1mm; border-bottom: 1px dotted #687; }
.print-footer { margin-top: auto; padding-top: 3mm; display: grid; gap: 1mm; border-top: 1px solid #999; color: #444; font-size: 6.3pt; }
.print-teacher-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 3mm; }
.print-teacher-grid > section { padding: 2mm; border: 1px solid #bbb; border-radius: 2mm; }
.print-timeline { display: grid; grid-template-columns: repeat(4, 1fr); gap: 2mm; }
.print-timeline div { padding: 2mm; background: #f2eee6; }
.print-questions, .print-prompts { margin: 0; padding-left: 5mm; display: grid; grid-template-columns: 1fr 1fr; gap: 1mm 4mm; }
.print-worksheet .print-prompts { grid-template-columns: 1fr; }
.print-worksheet .print-prompts li { margin-bottom: 2mm; }
.print-rubric table, .print-materials table { width: 100%; border-collapse: collapse; }
.print-rubric th, .print-rubric td, .print-materials th, .print-materials td { padding: 1.8mm; border: 1px solid #999; vertical-align: top; }
.print-checklists .print-check-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 4mm; }
.print-checklists ol { padding-left: 5mm; }

@media (max-width: 980px) {
  .topbar { position: relative; flex-wrap: wrap; }
  .topbar nav { order: 3; width: 100%; justify-content: flex-start; overflow-x: auto; flex-wrap: nowrap; }
  .hero { grid-template-columns: 82px 1fr; }
  .boundary-stamp { display: none; }
  .metric-strip { grid-template-columns: repeat(3, 1fr); }
  .metric-strip article:nth-child(3) { border-right: 0; }
  .directory-grid { grid-template-columns: repeat(2, 1fr); }
  .section-heading { grid-template-columns: 1fr; gap: 6px; }
  .guide-kicker, .timeline, .level-grid, .checklist-grid { grid-template-columns: 1fr; }
  .two-col, .support-grid, .handoff { grid-template-columns: 1fr; }
  .rubric-table { display: block; overflow-x: auto; }
}

@media (max-width: 620px) {
  main { width: min(100%, calc(100% - 18px)); }
  .hero { grid-template-columns: 1fr; min-height: 0; padding: 44px 22px; }
  .stage-mark { grid-template-columns: auto auto auto; align-items: baseline; gap: 8px; }
  .stage-mark strong { font-size: 4rem; }
  .metric-strip { grid-template-columns: 1fr 1fr; }
  .metric-strip article { border-bottom: 1px solid var(--line); }
  .directory-grid, .question-bank, .result-bridge { grid-template-columns: 1fr; }
  .teacher-guide > summary { grid-template-columns: 50px 1fr; gap: 12px; }
  .guide-meta { grid-column: 2; align-items: start; padding: 0; }
  .teacher-guide > summary::after { display: none; }
  .lesson-panel { padding: 17px; }
  .site-footer { display: grid; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; animation: none !important; }
}

@media (forced-colors: active) {
  * { box-shadow: none !important; }
  .hero, .topbar, .handoff, .validation-bar { border: 2px solid CanvasText; }
  button, a, summary { forced-color-adjust: auto; }
}

@media print {
  @page { size: A4 portrait; margin: 8mm; }
  html, body { margin: 0 !important; padding: 0 !important; background: white !important; }
  body > .screen-only, body > main, .screen-only { display: none !important; }
  .print-pack { display: block !important; }
  .print-sheet { width: 194mm; min-height: 281mm; padding: 0; display: flex !important; flex-direction: column; break-after: page; page-break-after: always; overflow: hidden; }
  .print-sheet:last-child { break-after: auto; page-break-after: auto; }
  body[data-print-target]:not([data-print-target="all"]) .print-sheet { display: none !important; }
  body[data-print-target="teacher-01"] [data-print-target="teacher-01"], body[data-print-target="teacher-02"] [data-print-target="teacher-02"], body[data-print-target="teacher-03"] [data-print-target="teacher-03"], body[data-print-target="teacher-04"] [data-print-target="teacher-04"], body[data-print-target="teacher-05"] [data-print-target="teacher-05"], body[data-print-target="teacher-06"] [data-print-target="teacher-06"], body[data-print-target="teacher-07"] [data-print-target="teacher-07"], body[data-print-target="teacher-08"] [data-print-target="teacher-08"], body[data-print-target="teacher-09"] [data-print-target="teacher-09"], body[data-print-target="teacher-10"] [data-print-target="teacher-10"], body[data-print-target="student-01"] [data-print-target="student-01"], body[data-print-target="student-02"] [data-print-target="student-02"], body[data-print-target="student-03"] [data-print-target="student-03"], body[data-print-target="student-04"] [data-print-target="student-04"], body[data-print-target="student-05"] [data-print-target="student-05"], body[data-print-target="student-06"] [data-print-target="student-06"], body[data-print-target="student-07"] [data-print-target="student-07"], body[data-print-target="student-08"] [data-print-target="student-08"], body[data-print-target="student-09"] [data-print-target="student-09"], body[data-print-target="student-10"] [data-print-target="student-10"], body[data-print-target="materials"] [data-print-target="materials"], body[data-print-target="rubric"] [data-print-target="rubric"], body[data-print-target="checklists"] [data-print-target="checklists"] { display: flex !important; }
}