:root {
  --navy: #003a73;
  --navy-dark: #002a54;
  --blue: #009fe6;
  --blue-soft: #e3f4fd;
  --ink: #1c2b36;
  --gray: #5b6b78;
  --line: #dde5ec;
  --bg: #f5f8fa;
  --white: #ffffff;
  --accent: #ff7a45;
  --green: #2bb673;
  --red: #e0443a;
  --radius: 14px;
  --shadow: 0 2px 12px rgba(0, 42, 84, 0.08);
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: 'Noto Sans JP', 'Inter', sans-serif;
  color: var(--ink);
  background: var(--bg);
  line-height: 1.8;
}

.container { max-width: 980px; margin: 0 auto; padding: 0 20px; }

/* ---------- header / hero(シリーズ共通) ---------- */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--navy);
  box-shadow: 0 2px 8px rgba(0,0,0,.15);
}
.header-inner {
  max-width: 980px; margin: 0 auto; padding: 0 20px;
  display: flex; align-items: center; justify-content: space-between;
  height: 58px;
}
.logo { color: #fff; font-weight: 900; font-size: 18px; display: flex; align-items: center; gap: 10px; }
.logo-mark {
  display: inline-flex; align-items: center; justify-content: center;
  width: 30px; height: 30px; border-radius: 8px;
  background: var(--blue); color: #fff; font-weight: 800; font-size: 15px;
}
.nav { display: flex; gap: 4px; flex-wrap: wrap; align-items: center; }
.nav a {
  color: #cfe3f5; text-decoration: none; font-size: 13px; font-weight: 500;
  padding: 6px 12px; border-radius: 999px; transition: .15s;
}
.nav a:hover { background: rgba(255,255,255,.14); color: #fff; }
.nav .nav-home {
  background: rgba(255,255,255,.14); color: #fff; font-weight: 700;
  border: 1px solid rgba(255,255,255,.25);
}
.nav .nav-home:hover { background: var(--blue); border-color: var(--blue); }

.hero {
  background: linear-gradient(135deg, var(--navy) 0%, #00518f 70%, #0070b8 100%);
  color: #fff; padding: 64px 0 56px;
}
.hero-eyebrow {
  font-family: 'Inter', sans-serif; font-weight: 600; font-size: 12px;
  letter-spacing: .22em; color: #7fd0f5; margin: 0 0 10px;
}
.hero h1 { font-size: 40px; font-weight: 900; margin: 0 0 16px; letter-spacing: .02em; }
.hero-lead { font-size: 15px; color: #d7e7f5; margin: 0 0 28px; }
.hero-lead strong { color: #fff; }
.hero-steps { display: flex; gap: 10px; flex-wrap: wrap; }
.step-chip {
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.3);
  color: #fff; text-decoration: none; font-size: 13px; font-weight: 700;
  padding: 8px 16px; border-radius: 999px; transition: .15s;
}
.step-chip:hover { background: var(--blue); border-color: var(--blue); }

/* ---------- lesson(共通) ---------- */
.lesson {
  background: var(--white); border-radius: var(--radius);
  box-shadow: var(--shadow); padding: 36px 36px 32px; margin: 36px 0;
}
.lesson-head { display: flex; align-items: center; gap: 14px; margin-bottom: 8px; }
.step-badge {
  background: var(--blue); color: #fff;
  font-family: 'Inter', sans-serif; font-weight: 800; font-size: 12px;
  letter-spacing: .08em; padding: 4px 12px; border-radius: 999px;
}
.lesson h2 { font-size: 24px; font-weight: 900; color: var(--navy); margin: 0; }
.lesson-desc { color: var(--gray); font-size: 14.5px; margin: 10px 0 20px; }
.lesson-desc strong { color: var(--navy); }
.sub-head { color: var(--navy); font-size: 17px; margin: 32px 0 12px; }

.term-grid, .tips-grid {
  display: grid; grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 14px; margin-top: 20px;
}
.term-card, .tip-card { background: var(--bg); border-radius: 10px; padding: 18px 18px 14px; border: 1px solid var(--line); }
.term-card h3, .tip-card h3 { font-size: 14.5px; color: var(--navy); margin: 6px 0 6px; }
.term-card p, .tip-card p { font-size: 13px; color: var(--gray); margin: 0; line-height: 1.7; }
.term-card p strong, .tip-card p strong { color: var(--navy); }
.term-icon { font-size: 18px; }

/* ---------- STEP1 図解 ---------- */
.diagram-wrap { display: flex; gap: 22px; align-items: center; flex-wrap: wrap; }
.trim-svg { flex: 0 0 auto; width: 360px; max-width: 100%; height: auto; background: #fafcfe; border: 1px solid var(--line); border-radius: 10px; }
.diagram-legend { flex: 1; min-width: 260px; list-style: none; margin: 0; padding: 0; font-size: 13px; color: var(--gray); }
.diagram-legend li { display: flex; align-items: flex-start; gap: 9px; margin: 9px 0; line-height: 1.6; }
.diagram-legend strong { color: var(--navy); }
.lg-swatch { flex-shrink: 0; width: 18px; height: 18px; border-radius: 4px; margin-top: 2px; }
.lg-swatch.trim { background: #fff; border: 2px solid var(--navy); }
.lg-swatch.bleed { background: var(--blue-soft); border: 1.5px dashed var(--blue); }
.lg-swatch.safe { background: #fff; border: 1.5px dashed var(--accent); }
.lg-swatch.tonbo { background: #fff; border: 1px solid var(--ink); position: relative; }

/* ---------- STEP2 塗り足しシミュ ---------- */
.bleed-area { display: flex; gap: 16px; align-items: center; justify-content: center; flex-wrap: wrap; }
.bleed-col { text-align: center; }
.bleed-cap { display: block; font-size: 11.5px; color: var(--gray); font-weight: 700; margin-top: 8px; }
.bleed-paper { position: relative; width: 220px; height: 150px; border-radius: 6px; overflow: hidden; background: #fff; border: 1px solid var(--line); }
.bleed-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg,#ff7a45,#ec407a 60%,#7e57c2);
  transition: inset .2s;
}
.bleed-bg.no-bleed { inset: 16px; }    /* 塗り足しなし=フチに白が残る */
.bleed-trim { position: absolute; inset: 16px; border: 1.5px dashed rgba(255,255,255,.9); pointer-events: none; }
.bleed-text {
  position: absolute; inset: 0; display: flex; flex-direction: column; align-items: center; justify-content: center;
  color: #fff; font-family: 'Inter',sans-serif; font-weight: 800; font-size: 26px; line-height: 1.1;
  text-shadow: 0 2px 6px rgba(0,0,0,.3); pointer-events: none;
}
.bleed-arrow { font-weight: 800; color: var(--accent); font-size: 15px; }
.bleed-result {
  position: relative; width: 190px; height: 128px; border-radius: 6px; overflow: hidden;
  background: #fff; border: 1px solid var(--line); display: flex; align-items: center; justify-content: center;
  box-shadow: 0 6px 16px rgba(0,30,60,.18);
}
.bleed-result .br-bg {
  position: absolute; inset: 0;
  background: linear-gradient(135deg,#ff7a45,#ec407a 60%,#7e57c2);
}
.bleed-result .br-white { position: absolute; background: #fff; }
.bleed-result .br-text {
  position: relative; color: #fff; font-family: 'Inter',sans-serif; font-weight: 800; font-size: 22px; line-height: 1.1; text-align: center;
  text-shadow: 0 2px 6px rgba(0,0,0,.3);
}
.br-placeholder { color: #b5c2cc; font-size: 12px; font-weight: 700; line-height: 1.6; }

.verdict { margin-top: 16px; border-radius: 12px; padding: 14px 20px; font-size: 14px; font-weight: 700; line-height: 1.7; }
.verdict[hidden] { display: none; }
.verdict.ok { background: #f2fbf6; border: 1.5px solid var(--green); color: #1d7a4d; }
.verdict.ng { background: #fdf0ef; border: 1.5px solid var(--red); color: #b3372f; }

/* ---------- STEP3 アウトライン化 ---------- */
.outline-area { display: flex; gap: 20px; align-items: stretch; flex-wrap: wrap; }
.outline-stage {
  flex: 1; min-width: 280px; border-radius: 12px; border: 1px solid var(--line);
  background: repeating-conic-gradient(#eef2f5 0% 25%, #fff 0% 50%) 50% / 20px 20px;
  display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 12px;
  padding: 26px 18px; position: relative; min-height: 200px;
}
.os-badge {
  position: absolute; top: 12px; left: 12px; font-size: 11px; font-weight: 800;
  background: var(--navy); color: #fff; border-radius: 999px; padding: 3px 12px;
}
.os-badge.warn { background: var(--red); }
.os-badge.safe { background: var(--green); }
.os-text {
  font-family: 'Noto Serif JP', serif; font-weight: 900; font-size: 44px; color: var(--navy);
  text-align: center; line-height: 1.1; letter-spacing: .04em;
}
.os-text .os-sub { display: block; font-size: 15px; font-weight: 600; margin-top: 6px; letter-spacing: .1em; }
/* フォント置換(崩れた)状態 */
.os-text.substituted { font-family: 'Inter', monospace; font-weight: 400; letter-spacing: -.02em; color: #555; font-style: italic; }
.os-text.substituted .os-sub { font-family: 'Noto Sans JP'; font-weight: 400; }
/* アウトライン化(図形)状態 */
.os-text.outlined { color: transparent; -webkit-text-stroke: 1.5px var(--navy); text-stroke: 1.5px var(--navy); }
.os-status { font-size: 12.5px; color: var(--gray); font-weight: 700; text-align: center; }
.outline-ctrls { flex: 0 0 250px; display: flex; flex-direction: column; gap: 10px; justify-content: center; }
.outline-note { font-size: 13px; color: var(--gray); margin: 4px 0 0; line-height: 1.7; }

/* ---------- STEP4 チェックゲーム ---------- */
.checklist { display: flex; flex-direction: column; gap: 8px; }
.ck-row {
  display: flex; align-items: center; gap: 12px; cursor: pointer; user-select: none;
  border: 2px solid var(--line); border-radius: 10px; padding: 12px 16px; background: #fff; transition: .12s;
}
.ck-row:hover { border-color: var(--blue); }
.ck-row.picked { border-color: var(--accent); background: #fff4ec; }
.ck-box {
  width: 22px; height: 22px; flex-shrink: 0; border-radius: 6px; border: 2px solid var(--line);
  display: flex; align-items: center; justify-content: center; font-size: 13px; font-weight: 800; color: #fff;
}
.ck-row.picked .ck-box { background: var(--accent); border-color: var(--accent); }
.ck-label { flex: 1; font-size: 14px; font-weight: 700; color: var(--ink); }
.ck-label small { display: block; font-size: 12px; font-weight: 500; color: var(--gray); }
.ck-row.show-ng { border-color: var(--red); background: #fdf0ef; }
.ck-row.show-ok { border-color: var(--green); background: #f2fbf6; }
.ck-mark { font-size: 13px; font-weight: 800; }
.ck-row.show-ng .ck-mark { color: var(--red); }
.ck-row.show-ok .ck-mark { color: var(--green); }

.result[hidden] { display: none; }
.result {
  margin-top: 16px; display: flex; align-items: center; gap: 24px;
  background: #f2fbf6; border: 1.5px solid var(--green);
  border-radius: var(--radius); padding: 20px 28px;
}
.result-score { font-size: 40px; flex-shrink: 0; }
.result-body p { margin: 0; font-weight: 900; color: var(--navy); font-size: 17px; }
.result-detail { font-size: 13px !important; color: var(--gray) !important; margin-top: 4px !important; font-weight: 500 !important; }

/* ---------- 最終チェックリスト ---------- */
.final-check { list-style: none; margin: 0; padding: 0; }
.final-check li { margin: 8px 0; }
.final-check label { display: flex; align-items: flex-start; gap: 10px; font-size: 14px; color: var(--ink); cursor: pointer; }
.final-check input { margin-top: 4px; accent-color: var(--green); width: 16px; height: 16px; }
.final-check strong { color: var(--navy); }

/* ---------- btn / chk / toast / table / note ---------- */
.toolbar { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; margin-top: 16px; }
.btn {
  font-family: inherit; font-size: 13.5px; font-weight: 700;
  padding: 9px 18px; border-radius: 999px; cursor: pointer;
  border: 1.5px solid var(--line); background: #fff; color: var(--navy); transition: .15s;
}
.btn:hover { border-color: var(--blue); color: var(--blue); }
.btn-primary { background: var(--navy); border-color: var(--navy); color: #fff; }
.btn-primary:hover { background: var(--navy-dark); color: #fff; }
.btn-accent { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-accent:hover { background: #e8642f; border-color: #e8642f; color: #fff; }
.btn-ghost { border-color: transparent; color: var(--gray); }
.chk { font-size: 13.5px; color: var(--ink); font-weight: 600; display: flex; align-items: center; gap: 7px; cursor: pointer; }
.chk input { accent-color: var(--blue); width: 16px; height: 16px; }
.status { font-size: 13px; color: var(--gray); margin-left: auto; }

.shortcut-table { width: 100%; border-collapse: collapse; font-size: 13.5px; }
.shortcut-table th, .shortcut-table td { text-align: left; padding: 10px 14px; border-bottom: 1px solid var(--line); }
.shortcut-table th { background: var(--bg); color: var(--navy); font-size: 12.5px; }

.note {
  margin-top: 18px; background: #fff8f0; border: 1px solid #ffd9bd;
  border-radius: 10px; padding: 16px 20px; font-size: 13.5px; color: #6b4a2f;
}
.note strong { color: #b34a14; }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translateX(-50%);
  background: var(--navy); color: #fff; font-size: 13.5px; font-weight: 700;
  padding: 10px 22px; border-radius: 999px; box-shadow: 0 6px 20px rgba(0,0,0,.25);
  z-index: 1000; transition: opacity .3s; max-width: 90vw; text-align: center;
}
.toast[hidden] { display: none; }

.site-footer {
  background: var(--navy); color: #9fc0dd; text-align: center;
  padding: 24px 20px; font-size: 12.5px; margin-top: 48px;
}
.site-footer p { margin: 0; }

/* ---------- ページ送りナビ ---------- */
.page-nav { display: flex; gap: 12px; align-items: stretch; margin: 44px auto 0; }
.pgnav { flex: 1; display: flex; flex-direction: column; justify-content: center; gap: 3px;
  text-decoration: none; background: #fff; border: 1.5px solid #dde5ec;
  border-radius: 12px; padding: 14px 18px; transition: .15s; box-shadow: 0 2px 12px rgba(0,42,84,.08); }
.pgnav:hover { border-color: #009fe6; transform: translateY(-2px); }
.pgnav.prev { text-align: left; }
.pgnav.next { text-align: right; }
.pgnav.top { flex: 0 0 130px; text-align: center; background: #003a73; border-color: #003a73; }
.pgnav.top .pgnav-dir, .pgnav.top .pgnav-name { color: #fff; }
.pgnav.top:hover { background: #002a54; border-color: #002a54; }
.pgnav-dir { font-size: 12px; font-weight: 700; color: #ff7a45; }
.pgnav-name { font-size: 14px; font-weight: 900; color: #003a73; }
.pgnav.is-disabled { visibility: hidden; }
@media (max-width: 560px) {
  .page-nav { flex-wrap: wrap; }
  .pgnav.top { order: -1; flex-basis: 100%; }
}

@media (max-width: 700px) {
  .hero h1 { font-size: 27px; }
  .lesson { padding: 24px 18px; }
  .header-inner { flex-direction: column; height: auto; padding: 10px 20px; gap: 4px; }
  .status { margin-left: 0; width: 100%; }
  .outline-ctrls { flex-basis: 100%; }
}