:root {
  --form: #f6f1e8;
  --form-2: #fffdf8;
  --ink: #1c2430;
  --mute: #5b6570;
  --guide: #e6c84a;
  --chair: #2a5f8a;
  --chair-dark: #1b3d5c;
  --ward: #3a8f6a;
  --break: #c45a3a;
  --line: rgba(28, 36, 48, 0.12);
  --sans: "Noto Sans SC", "PingFang SC", "Hiragino Sans GB", sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, Menlo, monospace;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

section[id] {
  scroll-margin-top: 84px;
}

body {
  margin: 0;
  color: var(--ink);
  background: var(--form);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.7;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

.app-link {
  color: var(--chair);
  text-decoration: underline;
  text-underline-offset: 3px;
}

button {
  font-family: inherit;
  cursor: pointer;
}

.skip {
  position: absolute;
  left: -999px;
}

.skip:focus {
  left: 12px;
  top: 12px;
  z-index: 40;
  background: var(--guide);
  padding: 8px 12px;
}

.grain {
  pointer-events: none;
  position: fixed;
  inset: 0;
  z-index: 30;
  opacity: 0.12;
  background-image: url("images/texture.webp");
  background-size: 480px auto;
  mix-blend-mode: multiply;
}

.nav {
  position: sticky;
  top: 0;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 28px;
  background: rgba(246, 241, 232, 0.94);
  border-bottom: 10px solid var(--guide);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  font-weight: 700;
}

.brand small {
  display: block;
  font-family: var(--mono);
  font-size: 10px;
  letter-spacing: 0.14em;
  color: var(--chair);
}

.tape {
  width: 28px;
  height: 10px;
  background: linear-gradient(90deg, var(--guide), var(--chair), var(--ward));
}

.nav-toggle {
  display: none;
  border: 2px solid var(--chair);
  background: var(--form-2);
  color: var(--chair);
  padding: 6px 12px;
  font-weight: 700;
}

.nav-links {
  display: flex;
  flex-wrap: wrap;
  gap: 8px 16px;
  font-size: 14px;
}

.nav-links a {
  color: var(--mute);
}

.nav-links a.is-active,
.nav-links a:hover {
  color: var(--ink);
}

.nav-links .live {
  background: var(--chair);
  color: #fff;
  padding: 6px 12px;
  font-weight: 700;
}

.wrap {
  width: min(1040px, calc(100% - 48px));
  margin: 0 auto;
}

.hero {
  position: relative;
  min-height: 78vh;
}

.hero > img {
  width: 100%;
  height: 78vh;
  object-fit: cover;
}

.hero-card {
  position: absolute;
  left: 40px;
  bottom: 40px;
  max-width: 560px;
  background: var(--form-2);
  padding: 28px 28px 24px;
  border-top: 10px solid var(--guide);
  box-shadow: 0 18px 40px rgba(28, 36, 48, 0.18);
}

.kicker {
  margin: 0 0 8px;
  color: var(--chair);
  font-size: 13px;
  letter-spacing: 0.08em;
}

.hero h1 {
  margin: 0;
  font-size: clamp(36px, 5vw, 56px);
  line-height: 1.05;
  font-weight: 900;
}

.lead,
.lede {
  color: var(--mute);
}

.chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
}

.chips li {
  background: var(--guide);
  color: var(--ink);
  padding: 4px 10px;
  font-size: 12px;
  font-weight: 700;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}

.btn {
  display: inline-block;
  padding: 10px 14px;
  font-weight: 700;
  border: 2px solid var(--chair);
}

.btn-fill {
  background: var(--chair);
  color: #fff;
}

.btn-ghost {
  background: var(--form-2);
  color: var(--chair);
}

.vlabel {
  font-family: var(--mono);
  font-size: 12px;
  letter-spacing: 0.16em;
  color: var(--chair);
  margin: 0 0 8px;
}

h2 {
  margin: 0 0 12px;
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 900;
}

#need,
#bench,
#value,
#rules,
#roles {
  padding: 64px 0;
}

#need {
  border-top: 10px solid var(--guide);
}

#flow {
  border-top: 10px solid var(--chair);
  padding-top: 64px;
}

#bench {
  border-top: 10px solid var(--ward);
  background: var(--form-2);
}

#value {
  border-top: 10px solid var(--guide);
}

#rules {
  border-top: 10px solid var(--break);
}

#roles {
  border-top: 10px solid var(--chair);
}

.need-row,
.value-row {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 24px;
}

.need-row article,
.value-row article {
  background: var(--form-2);
  padding: 18px;
  border-left: 8px solid var(--guide);
}

.value-row article {
  border-left-color: var(--chair);
}

.need-row h3,
.value-row h3 {
  margin: 0 0 8px;
}

.need-row p,
.need-row ul,
.value-row p {
  margin: 0;
  color: var(--mute);
}

.step {
  display: grid;
  grid-template-columns: 160px 1fr;
  border-bottom: 1px solid var(--line);
}

.step-sign {
  background: var(--chair-dark);
  color: #fff;
  display: flex;
  flex-direction: column;
  justify-content: center;
  padding: 24px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.step-sign span {
  display: block;
  font-family: var(--mono);
  font-size: 28px;
  color: var(--guide);
}

.step-body {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 20px;
  padding: 24px 28px;
  background: var(--form-2);
}

.step-body img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.step-body h3 {
  margin: 0 0 8px;
}

.step-body p {
  margin: 0;
  color: var(--mute);
}

.bench {
  margin-top: 20px;
  padding: 24px;
  background: var(--form);
  border: 1px solid var(--line);
}

.scenario-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.scene {
  border: 2px solid var(--chair);
  background: transparent;
  color: var(--chair);
  padding: 8px 12px;
  font-weight: 700;
}

.scene.is-on {
  background: var(--chair);
  color: #fff;
}

.quote {
  font-size: 22px;
  font-weight: 700;
  margin: 18px 0;
}

.strip {
  list-style: none;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 6px;
  padding: 0;
  margin: 0 0 16px;
}

.strip li {
  background: #ddd8ce;
  padding: 12px;
  text-align: center;
  font-weight: 700;
  position: relative;
}

.strip li.now {
  background: var(--guide);
}

.strip li.done {
  background: var(--ward);
  color: #fff;
}

.strip.broken li.now {
  background: var(--break);
  color: #fff;
  text-decoration: line-through;
}

#path-note {
  color: var(--mute);
}

.gate {
  margin-top: 16px;
  padding: 16px;
  background: #f8e6e0;
  border-left: 8px solid var(--break);
}

.gate[hidden] {
  display: none;
}

.rules {
  margin: 0;
  padding: 0;
  list-style: none;
}

.rules li {
  padding: 12px 0 12px 16px;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.rules li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 20px;
  width: 8px;
  height: 8px;
  background: var(--break);
}

.role-table {
  width: 100%;
  border-collapse: collapse;
}

.role-table th,
.role-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--line);
  vertical-align: top;
}

.role-table th {
  color: var(--chair);
  font-size: 13px;
}

.foot-link {
  margin-top: 24px;
  color: var(--mute);
}

footer {
  padding: 24px 0 40px;
  background: var(--chair-dark);
  color: #d7e4ef;
}

footer .wrap {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

footer .app-link {
  color: var(--guide);
}

@media (max-width: 900px) {
  .nav-toggle {
    display: inline-block;
  }

  .nav-links {
    display: none;
    width: 100%;
    flex-direction: column;
  }

  .nav-links.open {
    display: flex;
  }

  .hero-card {
    position: static;
    max-width: none;
    margin: -48px 16px 0;
  }

  .hero > img {
    height: 42vh;
  }

  .need-row,
  .value-row,
  .step,
  .step-body,
  .strip {
    grid-template-columns: 1fr;
  }

  .wrap {
    width: min(1040px, calc(100% - 32px));
  }
}