: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; }

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

/* スライダー行(共通) */
.vrow { display: flex; align-items: center; gap: 12px; }
.vlabel { flex-shrink: 0; min-width: 88px; font-size: 12.5px; font-weight: 800; color: var(--navy); }
.vrow input[type="range"] { flex: 1; accent-color: var(--blue); }
.vval { width: 48px; text-align: right; font-family: 'Inter',sans-serif; font-weight: 600; font-size: 13px; color: var(--navy); }
.dpi-box { background: var(--bg); border: 1px solid var(--line); border-radius: 10px; padding: 10px 14px; align-self: flex-start; }
.dpi-label { display: block; font-size: 11px; color: var(--gray); font-weight: 700; }
.dpi-verdict { font-weight: 900; font-size: 16px; color: var(--navy); }
.dpi-verdict.good { color: var(--green); }
.dpi-verdict.mid { color: #d98a1f; }
.dpi-verdict.bad { color: var(--red); }

/* ---------- STEP1 3属性 ---------- */
.attr-area { display: flex; gap: 20px; align-items: center; flex-wrap: wrap; }
.attr-swatch { flex: 0 0 150px; height: 150px; border-radius: 14px; border: 1px solid var(--line); background: hsl(205,80%,50%); }
.attr-ctrls { flex: 1; min-width: 260px; display: flex; flex-direction: column; gap: 12px; }
#a-h { background: linear-gradient(90deg,#f00,#ff0,#0f0,#0ff,#00f,#f0f,#f00); height: 8px; border-radius: 999px; }
.wheel-wrap { flex: 0 0 auto; text-align: center; }
.hue-wheel {
  width: 130px; height: 130px; border-radius: 50%;
  background: conic-gradient(red, magenta, blue, cyan, lime, yellow, red);
  -webkit-mask: radial-gradient(circle, transparent 38%, #000 39%);
  mask: radial-gradient(circle, transparent 38%, #000 39%);
}
.wheel-cap { display: block; font-size: 11.5px; color: var(--gray); font-weight: 700; margin-top: 6px; }

/* ---------- STEP2 配色パターン ---------- */
.scheme-area { display: flex; flex-direction: column; gap: 16px; }
.scheme-base #s-hue { background: linear-gradient(90deg,#f00,#ff0,#0f0,#0ff,#00f,#f0f,#f00); height: 8px; border-radius: 999px; }
.scheme-types { display: flex; gap: 8px; flex-wrap: wrap; }
.st-btn { font-family: inherit; font-size: 12.5px; font-weight: 700; cursor: pointer; border: 1.5px solid var(--line); background: #fff; color: var(--gray); border-radius: 999px; padding: 7px 16px; transition: .12s; }
.st-btn.on { border-color: var(--navy); background: var(--navy); color: #fff; }
.scheme-palette { display: flex; gap: 0; border-radius: 12px; overflow: hidden; border: 1px solid var(--line); height: 96px; }
.scheme-palette .sw { flex: 1; display: flex; align-items: flex-end; justify-content: center; padding-bottom: 8px; font-size: 10.5px; font-weight: 700; font-family: 'Inter',sans-serif; }
.scheme-desc { font-size: 13.5px; color: var(--gray); margin: 0; line-height: 1.7; }
.scheme-desc strong { color: var(--navy); }

/* ---------- STEP3 配色を当てはめる ---------- */
.apply-area { display: flex; gap: 20px; align-items: flex-start; flex-wrap: wrap; }
.apply-mock-wrap { flex: 0 0 280px; max-width: 100%; text-align: center; }
.mock-poster {
  width: 280px; max-width: 100%; border-radius: 12px; overflow: hidden; border: 1px solid var(--line);
  background: var(--c-base, #eef4fb); box-shadow: 0 8px 20px rgba(0,30,60,.12); transition: background .25s;
}
.mp-band { background: var(--c-main, #1f4e8c); color: #fff; font-family: 'Inter',sans-serif; font-weight: 800; font-size: 22px; letter-spacing: .04em; padding: 22px 18px; transition: background .25s; }
.mp-body { padding: 22px 20px 26px; }
.mp-lead { font-size: 22px; font-weight: 900; color: var(--c-main, #1f4e8c); margin: 0 0 8px; transition: color .25s; }
.mp-text { font-size: 13.5px; color: var(--c-text, #44525c); margin: 0 0 16px; line-height: 1.8; }
.mp-badge { display: inline-block; background: var(--c-accent, #ff8a3d); color: var(--c-on-accent, #fff); font-weight: 800; font-size: 13px; border-radius: 999px; padding: 6px 18px; transition: background .25s; }
.apply-mood { display: block; font-size: 12.5px; color: var(--gray); font-weight: 700; margin-top: 10px; }
.apply-palettes { flex: 1; min-width: 240px; display: flex; flex-direction: column; gap: 10px; }
.pal-btn { display: flex; align-items: center; gap: 12px; cursor: pointer; border: 2px solid var(--line); background: #fff; border-radius: 10px; padding: 10px 14px; transition: .12s; font-family: inherit; text-align: left; }
.pal-btn:hover { border-color: var(--blue); }
.pal-btn.on { border-color: var(--navy); background: var(--blue-soft); }
.pal-chips { display: flex; flex-shrink: 0; border-radius: 6px; overflow: hidden; border: 1px solid rgba(0,0,0,.1); }
.pal-chips span { width: 22px; height: 26px; }
.pal-name { font-size: 13.5px; font-weight: 700; color: var(--ink); }
.pal-name small { display: block; font-size: 11.5px; font-weight: 500; color: var(--gray); }

/* ---------- STEP4 コントラスト ---------- */
.contrast-area { display: flex; gap: 20px; align-items: stretch; flex-wrap: wrap; }
.contrast-preview { flex: 1; min-width: 280px; border-radius: 12px; border: 1px solid var(--line); padding: 26px 24px; display: flex; flex-direction: column; gap: 12px; justify-content: center; background: #fff; transition: background .15s; }
.cp-big { font-size: 26px; font-weight: 900; transition: color .15s; }
.cp-small { font-size: 13.5px; line-height: 1.8; transition: color .15s; }
.contrast-ctrls { flex: 0 0 250px; display: flex; flex-direction: column; gap: 12px; justify-content: center; }
.cc-row { display: flex; align-items: center; gap: 12px; }
.cc-row input[type="color"] { width: 54px; height: 36px; border: 1px solid var(--line); border-radius: 8px; background: none; cursor: pointer; padding: 2px; }
.contrast-judge { font-size: 13px; font-weight: 700; line-height: 1.8; }
.cj-line { display: flex; align-items: center; gap: 8px; }
.cj-line .cj-mark { font-weight: 800; }
.cj-line.pass { color: #1d7a4d; }
.cj-line.fail { color: var(--red); }

/* ---------- toast / table / note ---------- */
.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; }
  .apply-mock-wrap, .mock-poster, .contrast-ctrls { flex-basis: 100%; width: 100%; }
}