:root {
  --color-base: #f7fbf4;
  --color-ink: #16313b;
  --color-brand: #2d9cdb;
  --color-brand-deep: #1e7aae;
  --color-accent: #ffb547;
  --color-accent-line: #d27d00;
  --color-support: #76b66b;
  --color-support-text: #49803f;
  --color-surface: #ffffff;
  --color-muted: #557078;
  --color-line: #c9d9d6;
  --font-body: -apple-system, BlinkMacSystemFont, "Segoe UI", "Hiragino Kaku Gothic ProN", "Yu Gothic", Meiryo, sans-serif;
  --measure: 42rem;
  --space-page: clamp(1.25rem, 5vw, 3rem);
}

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

html {
  color: var(--color-ink);
  background: var(--color-base);
  font-family: var(--font-body);
  scroll-behavior: auto;
}

body {
  min-width: 20rem;
  margin: 0;
  font-size: 1rem;
  line-height: 1.8;
}

h1,
h2,
h3,
p {
  margin-block-start: 0;
}

h1,
h2,
h3 {
  line-height: 1.5;
  text-wrap: balance;
}

h1 {
  max-width: 14em;
  margin-block-end: 1.25rem;
  font-size: clamp(1.75rem, 7vw, 2.5rem);
}

h2 {
  margin-block-end: 0;
  font-size: 1.375rem;
}

h3 {
  margin-block-end: 0.5rem;
  font-size: 1.125rem;
}

a:focus-visible {
  outline: 3px solid var(--color-brand-deep);
  outline-offset: 3px;
}

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

.skip-link {
  position: fixed;
  z-index: 10;
  inset-block-start: 0.75rem;
  inset-inline-start: 0.75rem;
  padding: 0.65rem 1rem;
  color: var(--color-base);
  background: var(--color-ink);
  font-weight: 700;
  transform: translateY(-180%);
}

.skip-link:focus {
  transform: translateY(0);
}

.site-header {
  border-block-end: 1px solid var(--color-line);
  background: color-mix(in srgb, var(--color-base) 94%, transparent);
}

.site-header__inner,
.site-footer__inner,
main > section {
  width: min(100%, 48rem);
  margin-inline: auto;
  padding-inline: var(--space-page);
}

.site-header__inner {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1.5rem;
  align-items: center;
  justify-content: space-between;
  padding-block: 1rem;
}

.site-name,
.dev-label {
  margin: 0;
  font-size: 0.875rem;
  line-height: 1.5;
}

.site-name {
  font-weight: 700;
}

.dev-label,
.eyebrow {
  color: var(--color-support-text);
  font-weight: 700;
  letter-spacing: 0.08em;
}

.intro {
  padding-block: clamp(4.5rem, 18vw, 8rem);
}

.eyebrow {
  margin-block-end: 0.65rem;
  font-size: 0.875rem;
  line-height: 1.5;
}

.intro__lead {
  max-width: var(--measure);
  margin-block-end: 0;
}

.proposal-index,
.page-structure {
  padding-block: 3.5rem 6rem;
}

.section-heading {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 1rem;
  align-items: start;
  margin-block-end: 2rem;
}

.section-number {
  min-width: 2.75rem;
  margin: 0;
  color: var(--color-brand-deep);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 2rem;
  border-block-start: 3px solid currentColor;
}

.proposal-list {
  display: grid;
  gap: 1rem;
}

.proposal-slot {
  position: relative;
  min-height: 11rem;
  padding: 1.5rem;
  overflow: hidden;
  background: var(--color-surface);
  border: 1px dashed var(--color-brand-deep);
}

.proposal-slot--ready {
  border-style: solid;
  border-color: var(--color-support-text);
}

.proposal-slot__status {
  display: inline-block;
  margin-block-end: 1rem;
  padding: 0.2rem 0.65rem;
  color: var(--color-ink) !important;
  background: color-mix(in srgb, var(--color-support) 35%, var(--color-base));
  border-radius: 999px;
  font-weight: 700;
}

.proposal-slot__link {
  position: relative;
  z-index: 1;
  display: inline-block;
  margin-block-start: 1rem;
  color: var(--color-brand-deep);
  font-weight: 700;
  text-underline-offset: 0.25em;
}

.proposal-slot p:last-child,
.placeholder p:last-child {
  margin-block-end: 0;
  color: var(--color-muted);
  font-size: 0.875rem;
}

.proposal-slot__mark {
  position: absolute;
  inset-block-end: -0.4em;
  inset-inline-end: 0.1em;
  margin: 0;
  color: color-mix(in srgb, var(--color-brand) 14%, transparent);
  font-size: 7rem;
  font-weight: 700;
  line-height: 1;
}

.structure-list {
  display: grid;
  gap: 1rem;
  margin: 0;
  padding: 0;
  list-style: none;
}

.placeholder {
  display: grid;
  grid-template-columns: 2.75rem minmax(0, 1fr);
  gap: 1rem;
  min-height: 9rem;
  padding: 1.5rem;
  background: repeating-linear-gradient(
    -45deg,
    color-mix(in srgb, var(--color-brand) 5%, var(--color-surface)) 0,
    color-mix(in srgb, var(--color-brand) 5%, var(--color-surface)) 0.6rem,
    var(--color-surface) 0.6rem,
    var(--color-surface) 1.2rem
  );
  border: 1px solid var(--color-line);
}

.placeholder--hero {
  min-height: 20rem;
}

.placeholder__number {
  margin: 0;
  color: var(--color-brand-deep);
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.7;
}

.site-footer {
  padding-block: 3rem;
  color: var(--color-base);
  background: var(--color-ink);
}

.site-footer p {
  margin-block-end: 0.5rem;
  font-size: 0.875rem;
}

.site-footer span {
  display: inline-block;
  min-width: 3rem;
  font-weight: 700;
}

.site-footer .dev-note {
  margin-block-start: 2rem;
  margin-block-end: 0;
  color: #c9d9d6;
}

/* Design proposal A: quiet editorial HERO */
.proposal-page {
  background: var(--color-base);
}

.proposal-header {
  color: var(--color-base);
  background: var(--color-ink);
}

.proposal-header__inner {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  width: min(100%, 48rem);
  margin-inline: auto;
  padding: 0.85rem var(--space-page);
}

.proposal-header__name {
  margin: 0;
  font-size: 1rem;
  font-weight: 700;
}

.back-link {
  color: var(--color-base);
  font-size: 0.875rem;
  font-weight: 700;
  text-underline-offset: 0.25em;
}

.proposal-header a:focus-visible,
.hero-a a:focus-visible {
  outline-color: var(--color-base);
}

.hero-a {
  display: grid;
  min-height: min(52rem, calc(100svh - 3.5rem));
  overflow: hidden;
  color: var(--color-base);
  background: var(--color-ink);
}

.hero-a__media,
.hero-a__content {
  grid-area: 1 / 1;
}

.hero-a__media {
  position: relative;
  min-height: 100%;
}

.hero-a__media::after {
  position: absolute;
  inset: 0;
  content: "";
  background:
    linear-gradient(180deg, rgba(22, 49, 59, 0.08) 20%, rgba(22, 49, 59, 0.22) 45%, rgba(22, 49, 59, 0.94) 100%),
    linear-gradient(90deg, rgba(22, 49, 59, 0.34), transparent 70%);
}

.hero-a__media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: 52% 50%;
}

.asset-note {
  position: absolute;
  z-index: 2;
  inset-block-start: 1rem;
  inset-inline-end: var(--space-page);
  max-width: 15rem;
  margin: 0;
  padding: 0.25rem 0.6rem;
  color: var(--color-ink);
  background: color-mix(in srgb, var(--color-base) 90%, transparent);
  font-size: 0.8125rem;
  font-weight: 700;
  line-height: 1.5;
}

.hero-a__content {
  z-index: 1;
  align-self: end;
  width: min(100%, 48rem);
  margin-inline: auto;
  padding: clamp(8rem, 30svh, 16rem) var(--space-page) clamp(2rem, 7vw, 4rem);
}

.hero-a__kicker {
  margin-block-end: 0.75rem;
  font-size: 0.8125rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  line-height: 1.5;
}

.hero-a__copy {
  max-width: 17em;
  margin-block-end: 1.25rem;
  font-family: "Zen Maru Gothic", var(--font-body);
  font-size: clamp(1.75rem, 7vw, 2.25rem);
  font-weight: 700;
  line-height: 1.4;
  letter-spacing: 0.025em;
  text-wrap: balance;
}

.hero-a h1 {
  margin-block-end: 1.5rem;
  font-size: 1rem;
  line-height: 1.7;
  letter-spacing: 0.04em;
}

.hero-a__action {
  padding-block-start: 1.25rem;
  border-block-start: 1px solid rgba(247, 251, 244, 0.45);
}

.status-block {
  display: flex;
  flex-wrap: wrap;
  gap: 0.65rem 0.85rem;
  align-items: center;
  margin-block-end: 1rem;
}

.status-label {
  display: inline-flex;
  align-items: center;
  min-height: 2rem;
  margin: 0;
  padding: 0.2rem 0.75rem;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.875rem;
  font-weight: 700;
  line-height: 1.5;
}

.status-description {
  margin: 0;
  font-size: 0.875rem;
  font-weight: 700;
}

.status-label--before {
  color: var(--color-brand-deep);
  background: var(--color-surface);
}

.status-label--open {
  color: #315c29;
  background: #e7f4e3;
}

.hero-a .status-label--open {
  color: var(--color-ink);
  background: #dff1da;
}

.status-label--paused {
  color: var(--color-ink);
  background: #ffdfac;
  border-color: var(--color-accent-line);
}

.status-label--closed {
  color: #40585f;
  background: #edf2f1;
}

.status-label--cancelled {
  color: var(--color-base);
  background: var(--color-ink);
}

.cta-placeholder {
  display: flex;
  gap: 1rem;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  min-height: 3.5rem;
  padding: 0.85rem 1.1rem;
  color: var(--color-ink);
  background: var(--color-accent);
  border: 1px solid var(--color-accent-line);
  font-weight: 700;
}

.cta-note {
  margin: 0.45rem 0 0;
  color: #e7eeee;
  font-size: 0.8125rem;
  line-height: 1.6;
}

.design-check,
.prototype-continuation {
  width: min(100%, 48rem);
  margin-inline: auto;
  padding: 6rem var(--space-page);
}

.design-check {
  border-block-end: 1px solid var(--color-line);
}

.design-check__intro {
  max-width: var(--measure);
  margin-block-end: 2rem;
}

.state-samples {
  display: grid;
  gap: 0.85rem;
}

.state-sample {
  padding: 1.25rem;
  background: var(--color-surface);
  border-inline-start: 4px solid var(--color-line);
}

.state-sample h3 {
  margin-block-start: 1rem;
}

.state-sample p:not(.status-label) {
  margin-block-end: 0.5rem;
  font-size: 0.875rem;
}

.state-sample .state-sample__cta {
  margin-block-start: 1rem;
  margin-block-end: 0;
  color: var(--color-brand-deep);
  font-weight: 700;
}

.prototype-continuation > p:not(.eyebrow) {
  max-width: var(--measure);
  margin-block-end: 2rem;
}

.structure-list--compact .placeholder {
  min-height: 7rem;
}

@media (min-width: 48rem) {
  .proposal-list {
    grid-template-columns: repeat(3, 1fr);
  }

  .state-samples {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    transition-duration: 0.01ms !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
  }
}