/* ==========================================================================
   LEGACRAFT — Web制作ポートフォリオ｜デザインシステム
   ブランド基準：legacraft/brand/brand-guidelines.md Version 1.0 準拠
   ダークモード固定（Deep Green #22372E / Gold #B08D3F / Ivory #EDE4CE）。
   セリフ体のみ・左右対称・余白重視・角丸なし・控えめなfade/slideアニメーション。
   ========================================================================== */

@view-transition {
  navigation: auto;
}

:root {
  /* --- LEGACRAFT ブランドカラー（ダークモード固定） --- */
  --color-ink: #EDE4CE;              /* Ivory：主文字 */
  --color-ink-soft: #CFCBB5;         /* 補足文（ブランド指定の控えめ明色） */
  --color-paper: #22372E;            /* Deep Green：メイン背景 */
  --color-paper-alt: #1D2F27;        /* Deep Green（やや暗）：section互い違い背景 */
  --color-line: rgba(237, 228, 206, 0.16);   /* 罫線（Ivory低透過） */
  --color-line-strong: rgba(176, 141, 63, 0.5);
  --color-accent: #B08D3F;           /* Gold：ブランド規定値（ボタン・枠線・アイコン用） */
  --color-accent-text: #C9A55C;      /* Gold（本文サイズでのAAコントラスト確保用の明るめ調整） */
  /* Goldの地色（--color-accent-soft）の上に置く場合は背景が金側に寄るため、
     #C9A55C だと AA をわずかに割る（4.09 / 要件 4.5、実測 2026-09-05）。
     accent-soft 背景の上だけこちらを使う。 */
  --color-accent-text-on-soft: #D8B876;
  --color-accent-soft: rgba(176, 141, 63, 0.14);
  --color-accent-ink: #14211A;       /* Gold地の上に置く文字色（コントラスト確保） */
  --color-surface: #263F33;          /* カード等の浮いた面 */

  --font-en: "Trajan Pro", Georgia, "Times New Roman", serif;
  --font-jp: "Noto Serif JP", "Noto Serif CJK JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-display: "Trajan Pro", Georgia, "Noto Serif JP", "Noto Serif CJK JP", "Hiragino Mincho ProN", "Yu Mincho", "Times New Roman", serif;
  --font-body: "Georgia", "Noto Serif JP", "Noto Serif CJK JP", "Hiragino Mincho ProN", "Yu Mincho", "Times New Roman", serif;

  --container-width: 1120px;
  --space-section: clamp(4.5rem, 9vw, 9rem);
  --radius-md: 0;
  --radius-lg: 0;
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --dur-base: 0.6s;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

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

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

ul {
  margin: 0;
  padding: 0;
  list-style: none;
}

h1, h2, h3, h4 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.4;
  margin: 0 0 0.6em;
  letter-spacing: 0.01em;
}

p {
  margin: 0 0 1em;
}

/* --- Skip link / Accessibility --- */

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -100%;
  left: 1rem;
  z-index: 1000;
  background: var(--color-accent);
  color: var(--color-accent-ink);
  padding: 0.8rem 1.4rem;
  font-weight: 700;
  font-size: 0.9rem;
  transition: top 0.2s var(--ease-out);
}

.skip-link:focus {
  top: 1rem;
}

:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

@media (min-width: 768px) {
  .container {
    padding: 0 2.5rem;
  }
}

section {
  padding: var(--space-section) 0;
}

section + section {
  border-top: 1px solid var(--color-line);
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-en);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--color-accent-text);
  margin-bottom: 1rem;
}

.section-head {
  max-width: 640px;
  margin: 0 auto 3rem;
  text-align: center;
}

.section-head h1,
.section-head h2 {
  font-size: clamp(1.6rem, 3.2vw, 2.4rem);
}

.section-head p {
  color: var(--color-ink-soft);
}

/* ---------------------------------- Header ---------------------------------- */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: color-mix(in srgb, var(--color-paper) 92%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-line);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.7rem;
}

.brand-mark {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.brand-word {
  font-family: var(--font-en);
  font-weight: 700;
  font-size: 1.05rem;
  letter-spacing: 0.14em;
  color: var(--color-ink);
}

.nav-list {
  display: none;
  gap: 2.2rem;
  align-items: center;
}

@media (min-width: 900px) {
  .nav-list {
    display: flex;
  }
}

.nav-list a {
  position: relative;
  font-size: 0.9rem;
  font-weight: 500;
  letter-spacing: 0.04em;
  padding: 0.3rem 0;
}

.nav-list a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease-out);
}

.nav-list a:hover::after,
.nav-list a[aria-current="page"]::after {
  width: 100%;
}

.btn.nav-cta {
  display: none;
}

@media (min-width: 900px) {
  .btn.nav-cta {
    display: inline-flex;
  }
}

.nav-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  background: none;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-md);
  cursor: pointer;
}

@media (min-width: 900px) {
  .nav-toggle {
    display: none;
  }
}

.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  content: "";
  display: block;
  width: 18px;
  height: 1.5px;
  background: var(--color-ink);
  position: relative;
  transition: transform 0.25s var(--ease-out), opacity 0.25s var(--ease-out);
}

.nav-toggle span::before {
  position: absolute;
  top: -6px;
}

.nav-toggle span::after {
  position: absolute;
  top: 6px;
}

.nav-toggle[aria-expanded="true"] span {
  background: transparent;
}

.nav-toggle[aria-expanded="true"] span::before {
  top: 0;
  transform: rotate(45deg);
  background: var(--color-accent);
}

.nav-toggle[aria-expanded="true"] span::after {
  top: 0;
  transform: rotate(-45deg);
  background: var(--color-accent);
}

.mobile-nav {
  display: none;
  flex-direction: column;
  gap: 0;
  border-bottom: 1px solid var(--color-line);
  background: var(--color-paper);
}

.mobile-nav.is-open {
  display: flex;
}

.mobile-nav a {
  padding: 1rem 1.5rem;
  border-top: 1px solid var(--color-line);
  font-weight: 500;
  min-height: 44px;
  display: flex;
  align-items: center;
}

@media (min-width: 900px) {
  .mobile-nav {
    display: none !important;
  }
}

/* ---------------------------------- Buttons ---------------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.9rem;
  border-radius: 0;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  border: 1px solid transparent;
  transition: transform 0.35s var(--ease-out), background 0.3s var(--ease-out), color 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
  cursor: pointer;
  white-space: nowrap;
  min-height: 44px;
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-ink);
}

.btn-primary:hover {
  transform: translateY(-2px);
  background: #c39f52;
}

.btn-ghost {
  background: transparent;
  color: var(--color-ink);
  border-color: var(--color-line-strong);
}

.btn-ghost:hover {
  transform: translateY(-2px);
  border-color: var(--color-accent);
  background: var(--color-accent-soft);
}

.btn-arrow {
  transition: transform 0.3s var(--ease-out);
}

.btn:hover .btn-arrow {
  transform: translateX(4px);
}

/* ---------------------------------- Hero ---------------------------------- */

.hero {
  padding-top: clamp(4rem, 10vw, 7rem);
  padding-bottom: clamp(3rem, 8vw, 5rem);
}

.hero-copy {
  max-width: 760px;
  margin: 0 auto;
  text-align: center;
}

.hero h1 {
  font-size: clamp(2rem, 5.4vw, 3.6rem);
  line-height: 1.35;
}

.hero .sub {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: var(--color-ink-soft);
  max-width: 560px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 1rem;
  margin-top: 2.2rem;
}

/* ---------------------------------- Works grid ---------------------------------- */

.works-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .works-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

.work-card {
  display: block;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: var(--color-surface);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}

/* focus-within, not just focus-visible: the card is a <div> now, so the focus
   lands on one of the two links inside it and the card itself never receives
   it. Without this, tabbing through WORKS would move focus with no visible
   change to the card it is in. */
.work-card:hover,
.work-card:focus-visible,
.work-card:focus-within {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px -24px rgba(8, 16, 12, 0.45);
  border-color: var(--color-line-strong);
}

/* The case-study link wraps thumb + body so the whole card stays clickable.
   Only display is set here — the global `a` rule above already gives it
   color: inherit and text-decoration: none. */
.work-card-main {
  display: block;
}

/* Demo link row. Sits outside .work-card-main because an <a> cannot contain
   another <a>. Shares .work-body's horizontal padding so the two line up. */
.work-card-actions {
  padding: 0 1.5rem 1.4rem;
}

.work-card-actions a {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  min-height: 44px;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-accent-text);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.work-card-actions a:hover .btn-arrow,
.work-card-actions a:focus-visible .btn-arrow {
  transform: translateX(3px);
}

.work-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, var(--color-surface), var(--color-accent-soft));
  position: relative;
  overflow: hidden;
}

.work-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.work-thumb .work-number {
  position: absolute;
  right: 12px;
  bottom: 8px;
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-ink);
  opacity: 0.35;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.5);
}

.work-status {
  position: absolute;
  top: 12px;
  left: 12px;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 0.35rem 0.8rem;
  border-radius: 0;
  background: var(--color-paper);
  border: 1px solid var(--color-line-strong);
  color: var(--color-accent-text);
}

.work-body {
  padding: 1.4rem 1.5rem 1.6rem;
}

.work-industry {
  font-size: 0.75rem;
  color: var(--color-accent-text);
  font-weight: 700;
  letter-spacing: 0.04em;
  margin-bottom: 0.4rem;
}

.work-body h3 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.work-body p {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ---------------------------------- Value props ---------------------------------- */

.value-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  text-align: center;
}

@media (min-width: 700px) {
  .value-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1000px) {
  .value-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.value-item .num {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.6rem;
  color: var(--color-accent-text);
  margin-bottom: 0.8rem;
}

.value-item h3 {
  font-size: 1.02rem;
  margin-bottom: 0.5rem;
}

.value-item p {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
}

/* ---------------------------------- Flow ---------------------------------- */

.flow-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  border-top: 1px solid var(--color-line);
}

@media (min-width: 700px) {
  .flow-list {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    border-top: none;
    counter-reset: flow;
    text-align: center;
  }
}

.flow-item {
  padding: 1.4rem 0.5rem 1.4rem 0;
  border-bottom: 1px solid var(--color-line);
  position: relative;
}

@media (min-width: 700px) {
  .flow-item {
    border-bottom: none;
    border-right: 1px solid var(--color-line);
    padding: 0 1.2rem;
  }

  .flow-item:last-child {
    border-right: none;
  }
}

.flow-item .flow-index {
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--color-accent-text);
  font-size: 0.85rem;
  margin-bottom: 0.5rem;
  display: block;
}

.flow-item h3 {
  font-size: 0.95rem;
  margin-bottom: 0.3rem;
}

.flow-item p {
  font-size: 0.82rem;
  color: var(--color-ink-soft);
  margin-bottom: 0;
}

/* ---------------------------------- Service cards ---------------------------------- */

.service-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 900px) {
  .service-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.service-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 2rem 1.8rem;
  background: var(--color-surface);
  display: flex;
  flex-direction: column;
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out), border-color 0.4s var(--ease-out);
}

.service-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 24px 48px -28px rgba(8, 16, 12, 0.45);
}

.service-card.is-featured {
  border-color: var(--color-accent);
}

.service-tag {
  font-family: var(--font-en);
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  color: var(--color-accent-text);
  margin-bottom: 0.8rem;
}

.service-card h3 {
  font-size: 1.3rem;
}

.service-price {
  font-family: var(--font-display);
  font-size: 1.8rem;
  font-weight: 700;
  margin: 0.4rem 0 1.2rem;
  color: var(--color-ink);
}

.service-price span {
  font-size: 0.9rem;
  font-weight: 400;
  color: var(--color-ink-soft);
  font-family: var(--font-body);
}

.service-list {
  margin: 1.2rem 0;
  flex-grow: 1;
}

.service-list li {
  font-size: 0.88rem;
  padding: 0.5rem 0;
  border-top: 1px solid var(--color-line);
  color: var(--color-ink-soft);
}

.service-list li:first-child {
  border-top: none;
}

.service-note {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  border-top: 1px solid var(--color-line);
  padding-top: 1rem;
  margin-top: auto;
}

/* ---------------------------------- FAQ ---------------------------------- */

.faq-item {
  border-bottom: 1px solid var(--color-line);
}

.faq-item summary {
  padding: 1.4rem 0;
  font-weight: 700;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  min-height: 44px;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--color-accent);
  transition: transform 0.3s var(--ease-out);
  margin-left: 1rem;
  flex-shrink: 0;
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-item p {
  padding-bottom: 1.4rem;
  color: var(--color-ink-soft);
  max-width: 640px;
}

/* ---------------------------------- About ---------------------------------- */

.about-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
}

@media (min-width: 900px) {
  .about-grid {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

.about-portrait {
  aspect-ratio: 4 / 5;
  background: linear-gradient(150deg, var(--color-surface), var(--color-accent-soft));
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-soft);
  font-size: 0.85rem;
  text-align: center;
  padding: 1.5rem;
  border: 1px solid var(--color-line);
}

.principle-list {
  display: grid;
  gap: 1.6rem;
  margin-top: 2rem;
}

.principle-item h2 {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.4rem;
  color: var(--color-accent-text);
}

.principle-item p {
  color: var(--color-ink-soft);
  font-size: 0.9rem;
  margin-bottom: 0;
}

/* ---------------------------------- Contact ---------------------------------- */

.contact-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.2rem;
}

@media (min-width: 700px) {
  .contact-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.contact-card {
  border: 1px solid var(--color-line);
  border-radius: var(--radius-lg);
  padding: 1.8rem;
  background: var(--color-surface);
  text-align: center;
  transition: transform 0.3s var(--ease-out), border-color 0.3s var(--ease-out);
}

.contact-card.is-active:hover,
.contact-card.is-active:focus-visible {
  transform: translateY(-4px);
  border-color: var(--color-accent);
}

.contact-card h3 {
  font-size: 1rem;
  margin-bottom: 0.6rem;
}

.contact-status {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  padding: 0.35rem 0.8rem;
  border-radius: 0;
  background: transparent;
  border: 1px solid var(--color-line-strong);
  color: var(--color-ink-soft);
  margin-top: 0.8rem;
}

.contact-status.is-live {
  background: var(--color-accent-soft);
  border-color: var(--color-accent);
  color: var(--color-accent-text-on-soft);
}

.contact-mail {
  margin: 0;
  font-size: 0.92rem;
  color: var(--color-ink-soft);
  word-break: break-all;
}

/* 本文中のリンクは a{color:inherit;text-decoration:none} を継承すると
   地の文と区別できないため、本文内リンクだけ視認可能にする。 */
.principle-item p a {
  color: var(--color-accent-text);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  word-break: break-all;
}

/* ---------------------------------- Case study ---------------------------------- */

.cs-hero {
  padding-top: 3rem;
}

.cs-hero .btn {
  white-space: normal;
  text-align: center;
}

.cs-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin: 1.2rem 0 2rem;
}

.cs-meta span {
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.4rem 0.9rem;
  border-radius: 0;
  border: 1px solid var(--color-line-strong);
  color: var(--color-ink-soft);
}

.cs-visual {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--color-surface), var(--color-accent-soft));
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-line);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-ink-soft);
  margin-bottom: var(--space-section);
  overflow: hidden;
}

.cs-visual img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.cs-step {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  padding: 2.2rem 0;
  border-top: 1px solid var(--color-line);
}

@media (min-width: 800px) {
  .cs-step {
    grid-template-columns: 200px 1fr;
    gap: 3rem;
  }
}

.cs-step:last-child {
  border-bottom: 1px solid var(--color-line);
}

.cs-step h2 {
  font-size: 1rem;
  color: var(--color-accent-text);
  margin-bottom: 0.3em;
}

.cs-step p {
  color: var(--color-ink-soft);
  margin-bottom: 0;
}

.cs-nav {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  padding-top: var(--space-section);
  gap: 1rem;
}

/* ---------------------------------- Footer ---------------------------------- */

.site-footer {
  border-top: 1px solid var(--color-line);
  padding: 3rem 0;
}

.site-footer .container {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
}

.footer-brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
}

.footer-brand .brand-mark {
  width: 24px;
  height: 24px;
}

.footer-brand .brand-word {
  font-size: 0.9rem;
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 1.4rem;
}

.footer-nav a {
  font-size: 0.85rem;
  color: var(--color-ink-soft);
  min-height: 44px;
  display: inline-flex;
  align-items: center;
}

.footer-nav a:hover {
  color: var(--color-accent-text);
}

.copyright {
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  width: 100%;
  text-align: center;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-line);
}

/* ---------------------------------- Reveal animation ---------------------------------- */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-stagger.is-visible > * {
  transition-delay: calc(var(--stagger-i, 0) * 0.08s);
}

.hero-copy > * {
  opacity: 0;
  transform: translateY(16px);
  animation: fv-in var(--dur-base) var(--ease-out) forwards;
}

.hero-copy > *:nth-child(1) { animation-delay: 0.05s; }
.hero-copy > *:nth-child(2) { animation-delay: 0.15s; }
.hero-copy > *:nth-child(3) { animation-delay: 0.25s; }
.hero-copy > *:nth-child(4) { animation-delay: 0.35s; }

@keyframes fv-in {
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ---------------------------------- Reduced motion ---------------------------------- */

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }

  .hero-copy > * {
    opacity: 1;
    transform: none;
  }

  ::view-transition-group(*),
  ::view-transition-old(*),
  ::view-transition-new(*) {
    animation: none !important;
  }
}

/* ---------------------------------- View transitions ---------------------------------- */

::view-transition-old(root),
::view-transition-new(root) {
  animation-duration: 0.4s;
  animation-timing-function: cubic-bezier(0.16, 1, 0.3, 1);
}

/* ==========================================================================
   PROSE — 長文の本文ブロック（プライバシーポリシー等）
   既存のセクション見出し（.section-head）配下に置く読み物用スタイル。
   このページ以外に影響しないよう .prose 配下のみに限定する。
   ========================================================================== */

.prose {
  max-width: 46rem;
  margin: 0 auto;
  line-height: 1.9;
}

.prose h2 {
  margin: 3rem 0 1rem;
  font-size: 1.25rem;
  letter-spacing: 0.04em;
  border-bottom: 1px solid var(--color-line-strong);
  padding-bottom: 0.5rem;
}

.prose h3 {
  margin: 2rem 0 0.75rem;
  font-size: 1.05rem;
  letter-spacing: 0.02em;
}

.prose p {
  margin: 0 0 1.25rem;
}

.prose ul {
  margin: 0 0 1.5rem;
  padding-left: 1.5rem;
}

.prose li {
  margin-bottom: 0.5rem;
}

.prose code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.9em;
  word-break: break-all;
}

.prose .policy-updated {
  margin-top: 3rem;
  opacity: 0.7;
  font-size: 0.9rem;
}

/* ------------------------- Contact form（サイト内直接問い合わせ） -------------------------
   contact.html の #contact-form 専用。既存の .contact-card / .contact-grid には影響させない。
   入力欄のフォントサイズは16px（1rem）以上を維持する（iOSでのフォーカス時自動ズーム防止）。 */

.contact-form-panel {
  border: 1px solid var(--color-line-strong);
  border-radius: var(--radius-lg);
  background: var(--color-surface);
  padding: clamp(1.6rem, 4vw, 3rem);
  max-width: 760px;
  margin: 0 auto;
}

.contact-form-title {
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.8rem;
}

.contact-form-lead {
  margin: 0 0 2rem;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
}

.contact-form-field {
  margin-bottom: 1.6rem;
}

.contact-form-field label {
  display: block;
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  margin-bottom: 0.5rem;
}

.contact-form-req {
  display: inline-block;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.15rem 0.5rem;
  margin-left: 0.4rem;
  border: 1px solid var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-text-on-soft);
  vertical-align: 0.1em;
}

.contact-form-field input,
.contact-form-field select,
.contact-form-field textarea {
  display: block;
  width: 100%;
  padding: 0.8rem 0.9rem;
  border: 1px solid var(--color-line);
  border-radius: 0;
  background: var(--color-paper);
  color: var(--color-ink);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  min-height: 48px;
  transition: border-color 0.3s var(--ease-out), background 0.3s var(--ease-out);
}

.contact-form-field textarea {
  resize: vertical;
}

.contact-form-field select {
  appearance: none;
  -webkit-appearance: none;
  background-image: linear-gradient(45deg, transparent 50%, var(--color-accent-text) 50%),
    linear-gradient(135deg, var(--color-accent-text) 50%, transparent 50%);
  background-position: calc(100% - 1.15rem) 55%, calc(100% - 0.75rem) 55%;
  background-size: 0.4rem 0.4rem, 0.4rem 0.4rem;
  background-repeat: no-repeat;
  padding-right: 2.4rem;
}

.contact-form-field input:focus,
.contact-form-field select:focus,
.contact-form-field textarea:focus {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-color: var(--color-accent);
}

.contact-form-field input[aria-invalid="true"],
.contact-form-field select[aria-invalid="true"],
.contact-form-field textarea[aria-invalid="true"] {
  border-color: #E0876B;
}

.contact-form-field input:disabled,
.contact-form-field select:disabled,
.contact-form-field textarea:disabled {
  opacity: 0.55;
}

.contact-form-hint {
  margin: 0.5rem 0 0;
  font-size: 0.82rem;
  color: var(--color-ink-soft);
}

.contact-form-field-error {
  margin: 0.5rem 0 0;
  font-size: 0.85rem;
  color: #E0876B;
}

.contact-form-submit {
  width: 100%;
  justify-content: center;
  margin-top: 0.5rem;
}

.contact-form-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

.contact-form-note {
  margin: 0.9rem 0 0;
  font-size: 0.85rem;
  color: var(--color-accent-text);
  text-align: center;
}

.contact-form-consent {
  margin: 1rem 0 0;
  font-size: 0.8rem;
  color: var(--color-ink-soft);
  text-align: center;
}

.contact-form-consent a {
  color: var(--color-accent-text);
  text-decoration: underline;
  text-underline-offset: 0.2em;
}

.contact-form-error {
  margin-top: 1.5rem;
  padding: 1rem 1.1rem;
  border: 1px solid #E0876B;
  background: rgba(224, 135, 107, 0.1);
  font-size: 0.9rem;
}

.contact-form-error p {
  margin: 0;
}

.contact-form-error .contact-form-error-fallback {
  margin-top: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-ink-soft);
}

.contact-form-error a {
  color: var(--color-accent-text);
  text-decoration: underline;
  text-underline-offset: 0.2em;
  word-break: break-all;
}

.contact-form-success {
  margin: 1.5rem 0 0;
  padding: 1rem 1.1rem;
  border: 1px solid var(--color-accent);
  background: var(--color-accent-soft);
  color: var(--color-accent-text-on-soft);
  font-size: 0.92rem;
}

/* ハニーポット：視覚・支援技術の双方から実質的に隠すが、display:none は
   一部のbotに無視されにくくするため使わない（オフスクリーンに退避する）。 */
.contact-form-honeypot {
  position: absolute;
  left: -9999px;
  width: 1px;
  height: 1px;
  overflow: hidden;
}

.contact-alt-title {
  font-size: 1.15rem;
  letter-spacing: 0.04em;
  margin: 0 0 0.8rem;
}

.contact-alt-lead {
  margin: 0 0 2rem;
  font-size: 0.95rem;
  color: var(--color-ink-soft);
}