:root {
  --deep: #0b1517;
  --deep-panel: #10231f;
  --ink: #13201e;
  --ink-soft: #394845;
  --paper: #f3f6f4;
  --white: #ffffff;
  --mint: #58d6b1;
  --mint-strong: #35c99a;
  --mint-pale: #ddf5ed;
  --amber: #f4b740;
  --red: #df6555;
  --line: #d8e1de;
  --muted: #66736f;
  --shadow: 0 16px 40px rgba(11, 21, 23, 0.16);
  --radius: 18px;
  font-family: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic", system-ui, sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  min-height: 100vh;
  background: var(--paper);
  color: var(--ink);
  font-size: 16px;
  line-height: 1.7;
  overflow-wrap: break-word;
  line-break: strict;
}

body.menu-open { overflow: hidden; }

a { color: inherit; text-decoration: none; }
button { font: inherit; }
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 3px solid var(--mint-strong);
  outline-offset: 3px;
}

.skip-link {
  position: fixed;
  z-index: 100;
  top: 8px;
  left: 8px;
  padding: 10px 14px;
  background: var(--mint);
  color: var(--ink);
  transform: translateY(-150%);
}
.skip-link:focus { transform: translateY(0); }

.site-header {
  position: sticky;
  z-index: 30;
  top: 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
  padding: 10px max(18px, env(safe-area-inset-left));
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  background: rgba(11, 21, 23, 0.98);
  color: var(--white);
  backdrop-filter: blur(18px);
}

.brand { display: inline-flex; align-items: center; gap: 11px; min-height: 44px; }
.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 9px;
  background: var(--mint);
  color: var(--ink);
  font-size: 15px;
  font-weight: 900;
  letter-spacing: -0.04em;
}
.brand-copy { display: grid; line-height: 1.25; }
.brand-copy strong { font-size: 15px; }
.brand-copy small { color: #91a39e; font-size: 11px; letter-spacing: 0.06em; }

.icon-button {
  display: grid;
  width: 46px;
  height: 46px;
  padding: 12px;
  gap: 5px;
  border: 0;
  border: 1px solid #23433d;
  border-radius: 10px;
  background: var(--deep-panel);
  cursor: pointer;
}
.icon-button span { display: block; height: 2px; border-radius: 2px; background: var(--white); }

.menu {
  position: fixed;
  z-index: 60;
  top: 0;
  right: 0;
  width: min(90vw, 390px);
  height: 100dvh;
  padding: max(20px, env(safe-area-inset-top)) 18px max(24px, env(safe-area-inset-bottom));
  overflow: auto;
  background: var(--white);
  box-shadow: -24px 0 64px rgba(11, 21, 23, 0.24);
  transform: translateX(105%);
  transition: transform 180ms ease;
}
.menu.is-open { transform: translateX(0); }
.menu-backdrop {
  position: fixed;
  z-index: 50;
  inset: 0;
  background: rgba(10, 15, 10, 0.56);
  opacity: 0;
  transition: opacity 180ms ease;
}
.menu-backdrop.is-open { opacity: 1; }
.menu-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 14px; }
.menu-head strong { font-size: 20px; }
.text-button {
  min-height: 44px;
  padding: 0 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--white);
  color: var(--ink);
}
.menu-step {
  display: flex;
  align-items: center;
  gap: 13px;
  min-height: 68px;
  padding: 10px 6px;
  border-bottom: 1px solid var(--line);
}
.menu-step.is-current {
  margin-inline: -6px;
  padding-inline: 12px;
  border-radius: 10px;
  background: var(--mint-pale);
}
.menu-step-number {
  display: grid;
  flex: 0 0 42px;
  height: 42px;
  place-items: center;
  border-radius: 8px;
  background: var(--deep);
  color: var(--mint);
  font-weight: 900;
}
.menu-step-copy { display: grid; line-height: 1.35; }
.menu-step-copy strong { font-size: 15px; }
.menu-step-copy small { color: var(--muted); font-size: 13px; }
.menu-support {
  display: grid;
  gap: 8px;
  margin-top: 20px;
  padding: 18px;
  border-radius: 14px;
  background: var(--deep);
  color: var(--white);
}
.menu-support p { margin: 0; color: var(--mint); font-size: 10px; font-weight: 950; letter-spacing: 0.13em; }
.menu-support strong { font-size: 17px; line-height: 1.45; }
.menu-support small { color: #b7c6c2; font-size: 13px; line-height: 1.6; }
.menu-support a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 48px;
  margin-top: 4px;
  padding: 0 13px;
  border-radius: 8px;
  background: var(--mint);
  color: var(--ink);
  font-size: 14px;
  font-weight: 900;
}

main:focus { outline: none; }
.home-hero,
.journey,
.curriculum-section,
.support-section {
  width: min(1120px, calc(100% - 36px));
  margin-inline: auto;
}

.home-hero {
  display: grid;
  gap: 28px;
  padding: 58px 0 48px;
  background: var(--deep);
  color: var(--white);
  box-shadow: 0 0 0 100vmax var(--deep);
  clip-path: inset(0 -100vmax);
}
.eyebrow {
  margin: 0 0 8px;
  color: var(--mint-strong);
  font-size: 12px;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: 0.14em;
}
.hero-copy h1 {
  margin: 0;
  font-size: clamp(38px, 10vw, 74px);
  line-height: 1.08;
  letter-spacing: -0.055em;
}
.hero-copy h1 span { color: var(--mint); }
.hero-lead {
  max-width: 680px;
  margin: 22px 0 0;
  color: #d8e1de;
  font-size: clamp(17px, 2vw, 20px);
}

.progress-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 22px;
  border: 1px solid #23433d;
  border-radius: var(--radius);
  background: var(--deep-panel);
  color: var(--white);
}
.progress-ring {
  display: grid;
  flex: 0 0 96px;
  width: 96px;
  height: 96px;
  place-items: center;
  border-radius: 50%;
  background: conic-gradient(var(--mint) var(--progress), #23433d 0);
  position: relative;
}
.progress-ring::after {
  content: "";
  position: absolute;
  inset: 8px;
  border-radius: 50%;
  background: var(--deep-panel);
}
.progress-ring span { position: relative; z-index: 1; font-size: 13px; }
.progress-ring strong { font-size: 28px; line-height: 1; }
.progress-copy { display: grid; flex: 1; gap: 4px; }
.progress-copy small { color: #91a39e; font-size: 13px; }
.progress-copy > strong { font-size: 18px; }
.primary-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 52px;
  margin-top: 10px;
  padding: 0 17px;
  border-radius: 9px;
  background: var(--mint);
  color: var(--ink);
  font-weight: 900;
  white-space: nowrap;
}

.journey {
  padding: 64px 0 50px;
}
.section-heading h2 { margin: 0; font-size: clamp(28px, 5vw, 42px); line-height: 1.25; letter-spacing: -0.035em; }
.section-heading > p:last-child { margin: 10px 0 0; color: var(--muted); }
.journey-list {
  display: grid;
  gap: 10px;
  margin: 24px 0 0;
  padding: 0;
  list-style: none;
}
.journey-list li {
  display: flex;
  align-items: center;
  gap: 16px;
  min-height: 82px;
  padding: 16px 18px;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--white);
}
.journey-list b { color: var(--mint-strong); font-size: 13px; }
.journey-list span { display: grid; line-height: 1.4; }
.journey-list strong { font-size: 17px; }
.journey-list small { color: var(--muted); font-size: 14px; }

.curriculum-section { padding: 28px 0 80px; }
.step-grid { display: grid; gap: 14px; margin-top: 24px; }
.step-card {
  display: grid;
  min-height: 220px;
  padding: 22px;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  background: var(--white);
  box-shadow: none;
  transition: transform 150ms ease, box-shadow 150ms ease;
}
.step-card:active { transform: scale(0.985); }
.step-card.is-optional { border-color: rgba(244, 183, 64, 0.72); }
.step-card-top { display: flex; align-items: center; justify-content: space-between; }
.step-number {
  color: var(--ink);
  font-size: 42px;
  font-weight: 950;
  line-height: 1;
  letter-spacing: -0.06em;
}
.phase-chip {
  padding: 5px 10px;
  border-radius: 4px;
  background: var(--mint-pale);
  color: var(--ink);
  font-size: 12px;
  font-weight: 800;
}
.is-optional .phase-chip { background: #fff0c7; color: #694a00; }
.step-card h3 { margin: 20px 0 4px; font-size: 22px; line-height: 1.3; letter-spacing: -0.025em; }
.step-card p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.55; }
.step-progress { align-self: end; display: grid; grid-template-columns: 1fr auto; align-items: center; gap: 10px; margin-top: 24px; }
.step-progress > span, .page-progress { height: 6px; overflow: hidden; border-radius: 3px; background: #e7ecea; }
.step-progress i, .page-progress i { display: block; height: 100%; border-radius: inherit; background: var(--mint-strong); }
.step-progress small { color: var(--muted); font-size: 12px; }

.support-section { padding: 12px 0 82px; }
.support-panel {
  display: grid;
  gap: 22px;
  padding: clamp(26px, 6vw, 44px);
  border: 1px solid #23433d;
  border-radius: var(--radius);
  background: var(--deep);
  color: var(--white);
}
.support-panel h2 {
  max-width: 760px;
  margin: 0;
  font-size: clamp(26px, 5vw, 40px);
  line-height: 1.3;
  letter-spacing: -0.035em;
}
.support-panel div > p:last-child { max-width: 700px; margin: 12px 0 0; color: #b7c6c2; }
.support-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 56px;
  padding: 0 18px;
  border-radius: 9px;
  background: var(--mint);
  color: var(--ink);
  font-weight: 900;
}
.support-panel.is-compact {
  margin-top: 18px;
  padding: 20px;
  gap: 16px;
  background: var(--deep-panel);
}
.support-panel.is-compact h2 { font-size: 22px; }
.support-panel.is-compact div > p:last-child { margin-top: 7px; font-size: 14px; line-height: 1.65; }
.support-panel.is-compact .support-button { min-height: 52px; font-size: 14px; }

.lesson-shell {
  width: min(760px, calc(100% - 28px));
  margin: 0 auto;
  padding: 22px 0 calc(112px + env(safe-area-inset-bottom));
}
.lesson-header { margin-bottom: 18px; }
.back-link {
  display: inline-flex;
  align-items: center;
  min-height: 44px;
  color: var(--muted);
  font-size: 14px;
  font-weight: 700;
}
.lesson-step-row { display: flex; justify-content: space-between; align-items: baseline; }
.lesson-step-row span { font-size: 18px; font-weight: 950; letter-spacing: 0.05em; }
.lesson-step-row small { color: var(--muted); font-weight: 700; }
.page-progress { width: 100%; margin-top: 8px; }
.lesson-step-title { margin: 9px 0 0; color: var(--muted); font-size: 14px; }

.lesson-card {
  padding: clamp(24px, 6vw, 44px);
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--white);
  box-shadow: none;
}
.lesson-tag {
  display: inline-flex;
  align-self: flex-start;
  margin: 0 0 14px;
  padding: 5px 10px;
  border-radius: 4px;
  background: var(--mint);
  color: var(--deep);
  font-size: 12px;
  font-weight: 900;
  line-height: 1.4;
  letter-spacing: 0.08em;
}
.lesson-card h1 {
  margin: 0;
  font-size: clamp(30px, 8vw, 48px);
  line-height: 1.22;
  letter-spacing: -0.045em;
}
.lesson-card.is-cover {
  position: relative;
  min-height: min(58vh, 510px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  overflow: hidden;
  border-color: #23433d;
  background: var(--deep);
  color: var(--white);
}
.lesson-card.is-cover::before {
  content: "";
  position: absolute;
  inset: 0 auto 0 0;
  width: 6px;
  background: var(--mint);
}
.lesson-card.is-cover .lesson-content { margin-top: 34px; }
.lesson-card.is-cover .lesson-summary {
  border-color: #23433d;
  background: transparent;
}
.lesson-card.is-cover .lesson-summary p { color: #e6e8e8; }
.lesson-card.is-cover .visual-card {
  border-color: #23433d;
  background: var(--deep-panel);
}
.lesson-card.is-cover .visual-card p,
.lesson-card.is-cover .visual-card blockquote { color: #e6e8e8; }
.lesson-card.is-cover .visual-card blockquote,
.lesson-card.is-cover .visual-context blockquote {
  border-left-color: var(--mint);
  background: #17302a;
  color: var(--white);
}
.cover-content { margin-top: 30px; }
.cover-message {
  display: grid;
  gap: 18px;
  padding: 24px;
  border: 1px solid #23433d;
  border-radius: 16px;
  background: var(--deep-panel);
}
.cover-kicker {
  margin: 0;
  color: var(--mint);
  font-size: 12px;
  font-weight: 950;
  line-height: 1.4;
  letter-spacing: 0.12em;
}
.cover-statement { margin: 0; font-size: clamp(26px, 7vw, 38px); font-weight: 900; line-height: 1.32; letter-spacing: -0.035em; }
.cover-statement span { display: block; }
.cover-statement .is-accent { color: var(--mint); }
.cover-support { margin: 0; color: #d4dfdc; font-size: 16px; line-height: 1.75; }
.cover-path { display: flex; flex-wrap: wrap; align-items: center; gap: 8px; }
.cover-path span {
  padding: 7px 10px;
  border: 1px solid #2b5149;
  border-radius: 7px;
  background: #142925;
  color: var(--white);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.4;
}
.cover-path i { color: var(--mint); font-size: 15px; font-style: normal; font-weight: 950; }
.cover-bridge {
  margin: 0;
  padding: 12px 14px;
  border-left: 4px solid var(--mint);
  border-radius: 0 9px 9px 0;
  background: #17302a;
  color: var(--white);
  font-size: 15px;
  font-weight: 850;
}
.lesson-content { display: grid; gap: 20px; margin-top: 28px; }
.lesson-summary {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 12px;
  padding: 0 0 20px;
  border-bottom: 1px solid var(--line);
}
.lesson-summary > span,
.visual-note > span {
  display: inline-flex;
  padding: 4px 7px;
  border-radius: 4px;
  background: var(--mint-pale);
  color: var(--ink);
  font-size: 11px;
  font-weight: 950;
  line-height: 1.4;
  letter-spacing: 0.08em;
}
.lesson-summary p { margin: 0; color: var(--ink-soft); font-size: 18px; line-height: 1.65; }
.lesson-summary p + p { margin-top: 5px; }
.visual-context {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 12px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 12px;
  background: #f8faf9;
}
.visual-context > span {
  padding: 4px 7px;
  border-radius: 4px;
  background: var(--deep);
  color: var(--mint);
  font-size: 12px;
  font-weight: 950;
  line-height: 1.4;
  letter-spacing: 0.08em;
}
.visual-context > div { display: grid; gap: 8px; min-width: 0; }
.visual-context p { margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }
.visual-context blockquote {
  margin: 0;
  padding: 10px 12px;
  border-left: 4px solid var(--mint-strong);
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
}
.visual-context.is-flow > div { gap: 24px; }
.visual-context.is-flow p { position: relative; font-weight: 800; color: var(--ink); }
.visual-context.is-flow p:not(:last-child)::after {
  content: "↓";
  position: absolute;
  left: 50%;
  bottom: -22px;
  color: var(--mint-strong);
  transform: translateX(-50%);
}
.visual-context.is-chips > div { display: flex; flex-wrap: wrap; gap: 8px; }
.visual-context.is-chips p {
  padding: 5px 9px;
  border-radius: 999px;
  background: var(--mint-pale);
  color: var(--ink);
  font-weight: 800;
}
.visual-layout { display: grid; gap: 12px; }
.visual-card {
  position: relative;
  min-width: 0;
  padding: 17px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: #f8faf9;
}
.visual-index {
  display: inline-grid;
  min-width: 30px;
  min-height: 26px;
  margin-bottom: 10px;
  padding: 4px 8px;
  place-items: center;
  border-radius: 6px;
  background: var(--deep);
  color: var(--mint);
  font-size: 12px;
  font-weight: 950;
  line-height: 1.25;
  letter-spacing: 0.05em;
}
.visual-card h3 { margin: 0; font-size: 18px; line-height: 1.45; letter-spacing: -0.02em; }
.visual-card-body { display: grid; gap: 8px; margin-top: 9px; }
.visual-card p { margin: 0; color: var(--ink-soft); font-size: 16px; line-height: 1.65; }
.visual-card blockquote {
  margin: 0;
  padding: 12px 13px;
  border-left: 4px solid var(--mint-strong);
  border-radius: 0 8px 8px 0;
  background: var(--white);
  color: var(--ink);
  font-size: 16px;
  font-weight: 700;
  line-height: 1.7;
}
.visual-pair { display: grid; grid-template-columns: minmax(72px, 0.65fr) 1.35fr; gap: 10px; }
.visual-pair b { color: var(--ink); }
.visual-flow { gap: 28px; }
.visual-flow .visual-card:not(:last-child)::after {
  content: "↓";
  position: absolute;
  right: 50%;
  bottom: -25px;
  color: var(--mint-strong);
  font-size: 18px;
  font-weight: 900;
  transform: translateX(50%);
}
.visual-relation { gap: 28px; }
.visual-relation .visual-card:nth-child(-n+2)::after {
  content: "↓";
  position: absolute;
  right: 50%;
  bottom: -25px;
  color: var(--mint-strong);
  font-size: 18px;
  font-weight: 900;
  transform: translateX(50%);
}
.visual-relation .visual-card:nth-child(3) { border-color: var(--mint-strong); background: var(--mint-pale); }
.visual-relation .visual-card:nth-child(4) { margin-top: 4px; border-left: 5px solid var(--red); background: #fff3f1; }
.visual-relation .visual-card:nth-child(4) .visual-index { background: var(--red); color: var(--white); }
.visual-flow .visual-card:last-child,
.visual-takeaway .visual-card:last-child { border-color: var(--mint-strong); background: var(--mint-pale); }
.visual-compare { gap: 14px; }
.visual-compare .visual-card { border-top: 4px solid var(--deep); }
.visual-compare .visual-card:nth-child(even) { border-top-color: var(--mint-strong); background: #eefaf6; }
.visual-grid { grid-template-columns: 1fr; }
.visual-grid .visual-card { padding: 15px; }
.visual-checklist .visual-card {
  display: grid;
  grid-template-columns: auto 1fr;
  column-gap: 12px;
  align-items: start;
  padding: 13px 15px;
  background: var(--white);
}
.visual-checklist .visual-index { grid-row: 1 / span 2; margin: 0; }
.visual-checklist .visual-card h3 { font-size: 16px; }
.visual-checklist .visual-card-body { grid-column: 2; margin-top: 3px; }
.choice-card { display: grid; grid-template-columns: auto 1fr; gap: 12px; align-items: start; background: var(--white); }
.choice-card .visual-index { margin: 0; border-radius: 50%; }
.choice-card > p { color: var(--ink); font-size: 16px; }
.visual-answer .visual-card:first-child { border: 2px solid var(--mint-strong); background: var(--mint-pale); }
.visual-takeaway .visual-card { border-left: 5px solid var(--mint-strong); background: var(--white); }
.visual-scale {
  display: grid;
  gap: 8px;
  padding: 15px 17px;
  border-radius: 12px;
  background: var(--deep);
  color: var(--white);
}
.visual-scale > small { color: #b7cec7; font-weight: 800; }
.visual-scale > div { display: grid; grid-template-columns: auto 1fr auto; align-items: center; gap: 10px; }
.visual-scale span { height: 7px; border-radius: 4px; background: linear-gradient(90deg, #66736f, var(--mint)); }
.visual-scale b { font-size: 12px; letter-spacing: 0.06em; }
.visual-note {
  display: grid;
  grid-template-columns: auto 1fr;
  align-items: start;
  gap: 10px;
  margin: 0;
  padding: 14px 16px;
  border-left: 5px solid var(--mint-strong);
  border-radius: 8px;
  background: var(--mint-pale);
  color: var(--ink);
  font-size: 16px;
  font-weight: 800;
  line-height: 1.6;
}

.prompt-panel {
  margin-top: 18px;
  padding: 22px;
  border: 1px solid #23433d;
  border-radius: 18px;
  background: var(--deep);
  color: var(--white);
  box-shadow: var(--shadow);
}
.prompt-heading { display: flex; align-items: flex-start; justify-content: space-between; gap: 12px; }
.prompt-heading .eyebrow { color: var(--mint); }
.prompt-heading h2 { margin: 0; font-size: 22px; line-height: 1.35; }
.prompt-guide { margin: 14px 0 0; color: #d8dfd6; font-size: 13px; font-weight: 700; }
.copy-all,
.prompt-block-head button {
  min-height: 44px;
  padding: 0 13px;
  border: 1px solid rgba(255,255,255,0.24);
  border-radius: 8px;
  background: var(--deep-panel);
  color: var(--white);
  cursor: pointer;
  font-size: 14px;
  font-weight: 800;
}
.copy-all.is-copied,
.prompt-block-head button.is-copied { border-color: var(--mint); color: var(--mint); }
.prompt-intro { margin: 16px 0 0; color: #c6cec5; font-size: 14px; }
.prompt-blocks { display: grid; gap: 12px; margin-top: 18px; }
.prompt-block {
  overflow: hidden;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 12px;
  background: var(--deep-panel);
}
.prompt-block-head { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 11px 11px 8px 15px; }
.prompt-block-head strong { font-size: 14px; }
.prompt-block pre {
  margin: 0;
  padding: 15px;
  border-top: 1px solid rgba(255,255,255,0.1);
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  color: #f3f6f2;
  font: inherit;
  font-size: 15px;
  line-height: 1.7;
}
.chatgpt-button {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 54px;
  margin-top: 14px;
  padding: 0 16px;
  border-radius: 9px;
  background: var(--mint);
  color: var(--ink);
  font-weight: 900;
}

.source-links { margin-top: 16px; border: 1px solid var(--line); border-radius: 14px; background: rgba(255,255,255,0.72); }
.source-links summary { min-height: 54px; padding: 13px 17px; cursor: pointer; font-weight: 800; }
.source-links > div { display: grid; gap: 8px; padding: 0 12px 12px; }
.source-links a { display: flex; justify-content: space-between; min-height: 48px; padding: 11px 13px; border-radius: 8px; background: var(--white); font-size: 14px; font-weight: 700; }

.completion-card {
  display: grid;
  gap: 14px;
  margin-top: 18px;
  padding: 20px;
  border: 2px solid var(--ink);
  border-radius: 16px;
  background: var(--white);
}
.completion-card.is-complete { border-color: var(--mint-strong); background: var(--mint-pale); }
.completion-card > div { display: grid; }
.completion-card strong { font-size: 18px; }
.completion-card small { color: var(--muted); font-size: 13px; }
.completion-card button {
  min-height: 54px;
  padding: 0 16px;
  border: 0;
  border-radius: 9px;
  background: var(--deep);
  color: var(--white);
  cursor: pointer;
  font-weight: 900;
}
.completion-card button:disabled { opacity: 0.65; cursor: wait; }
.completion-card.is-complete button { background: transparent; color: var(--ink); border: 1px solid var(--line); }

.lesson-nav {
  position: fixed;
  z-index: 25;
  right: max(12px, env(safe-area-inset-right));
  bottom: max(12px, env(safe-area-inset-bottom));
  left: max(12px, env(safe-area-inset-left));
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  max-width: 620px;
  min-height: 68px;
  margin: auto;
  padding: 7px;
  border: 1px solid rgba(255,255,255,0.16);
  border-radius: 14px;
  background: rgba(11,21,23,0.97);
  box-shadow: 0 12px 34px rgba(11,21,23,0.28);
  backdrop-filter: blur(16px);
}
.lesson-nav a,
.lesson-nav button {
  display: grid;
  place-items: center;
  gap: 0;
  min-height: 54px;
  border: 0;
  border-radius: 9px;
  background: transparent;
  color: var(--white);
  cursor: pointer;
}
.lesson-nav a:last-child { background: var(--mint); color: var(--deep); }
.lesson-nav span { font-size: 20px; font-weight: 900; line-height: 1; }
.lesson-nav small { font-size: 12px; line-height: 1.2; }
.lesson-nav .is-muted { color: #c1c8c0; }

.toast {
  position: fixed;
  z-index: 90;
  right: 20px;
  bottom: calc(94px + env(safe-area-inset-bottom));
  left: 20px;
  max-width: 420px;
  margin: auto;
  padding: 13px 16px;
  border-radius: 10px;
  background: var(--mint);
  color: var(--ink);
  box-shadow: var(--shadow);
  opacity: 0;
  transform: translateY(12px);
  pointer-events: none;
  text-align: center;
  font-size: 14px;
  font-weight: 900;
  transition: opacity 160ms ease, transform 160ms ease;
}
.toast.is-visible { opacity: 1; transform: translateY(0); }

@media (min-width: 720px) {
  .site-header { padding-inline: 28px; }
  .home-hero { grid-template-columns: minmax(0, 1.5fr) minmax(310px, 0.7fr); align-items: end; padding-top: 82px; }
  .journey-list { grid-template-columns: repeat(4, 1fr); }
  .journey-list li { min-height: 130px; align-items: flex-start; flex-direction: column; }
  .step-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .visual-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .primary-button { font-size: 14px; }
  .step-card:hover { transform: translateY(-3px); box-shadow: 0 16px 42px rgba(17,24,17,0.09); }
  .completion-card { grid-template-columns: 1fr auto; align-items: center; }
  .completion-card button { min-width: 190px; }
  .support-panel:not(.is-compact) { grid-template-columns: minmax(0, 1fr) minmax(250px, 320px); align-items: end; }
  .support-panel.is-compact { grid-template-columns: minmax(0, 1fr) auto; align-items: center; }
  .support-panel.is-compact .support-button { min-width: 235px; }
}

@media (min-width: 1040px) {
  .step-grid { grid-template-columns: repeat(3, minmax(0, 1fr)); }
}

@media (max-width: 480px) {
  .brand-copy small { display: none; }
  .home-hero { padding-top: 38px; }
  .hero-copy h1 { font-size: 34px; }
  .section-heading h2 { font-size: 26px; }
  .progress-card { align-items: flex-start; }
  .progress-ring { flex-basis: 82px; width: 82px; height: 82px; }
  .progress-ring strong { font-size: 23px; }
  .lesson-card { padding: 22px; }
  .lesson-card h1 { font-size: 29px; }
  .lesson-card.is-cover { min-height: auto; padding-block: 30px; }
  .cover-message { padding: 20px; }
  .cover-statement { font-size: 27px; }
  .cover-path { display: grid; grid-template-columns: 1fr; }
  .cover-path i { justify-self: center; transform: rotate(90deg); }
  .prompt-heading { display: grid; }
  .copy-all { justify-self: start; }
}

@media (max-width: 360px) {
  .hero-copy h1 { font-size: 29px; }
  .progress-card { display: grid; }
  .progress-ring { width: 76px; height: 76px; }
  .progress-copy { min-width: 0; width: 100%; }
  .primary-button { width: 100%; }
}

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