/* =========================================================
   Tales Arc コーポレートサイト スタイルシート
   ========================================================= */

:root {
  --color-bg: #ffffff;
  --color-bg-soft: #f7f5f3;
  --color-text: #1a1816;
  --color-text-soft: #5c5854;
  --color-border: #e7e3df;
  --color-accent: #a8613c;
  --color-accent-soft: #f1e3da;
  --color-accent-contrast: #ffffff;

  --font-serif: "Iowan Old Style", "Georgia", "Hiragino Mincho ProN", "YuMincho",
    "Yu Mincho", serif;
  --font-sans: -apple-system, BlinkMacSystemFont, "Hiragino Kaku Gothic ProN",
    "Hiragino Sans", "Yu Gothic", "Meiryo", sans-serif;

  --container-width: 1120px;
  --space-section: clamp(72px, 12vw, 168px);
  --transition: 0.5s cubic-bezier(0.22, 1, 0.36, 1);
}

:root[data-theme="dark"] {
  --color-bg: #121110;
  --color-bg-soft: #1a1816;
  --color-text: #f3efea;
  --color-text-soft: #b3aba3;
  --color-border: #322e2a;
  --color-accent: #d98b5f;
  --color-accent-soft: #33261e;
  --color-accent-contrast: #1a1110;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --color-bg: #121110;
    --color-bg-soft: #1a1816;
    --color-text: #f3efea;
    --color-text-soft: #b3aba3;
    --color-border: #322e2a;
    --color-accent: #d98b5f;
    --color-accent-soft: #33261e;
    --color-accent-contrast: #1a1110;
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  * {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

body {
  margin: 0;
  background: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  transition: background-color var(--transition), color var(--transition);
}

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

[hidden] {
  display: none !important;
}

a {
  color: inherit;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

.skip-link {
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  padding: 12px 20px;
  z-index: 1000;
}

.skip-link:focus {
  left: 24px;
  top: 24px;
}

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

.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 32px;
  background: color-mix(in srgb, var(--color-bg) 82%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color var(--transition), background-color var(--transition);
}

.site-header.is-scrolled {
  border-bottom-color: var(--color-border);
}

.brand {
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  color: var(--color-text);
}

.brand-logo {
  height: 22px;
  width: auto;
  display: block;
}

.brand-wordmark {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  white-space: nowrap;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 20px;
}

.nav-links {
  display: flex;
  gap: 28px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.85rem;
  letter-spacing: 0.04em;
  color: var(--color-text-soft);
  transition: color var(--transition);
}

.nav-links a:hover,
.nav-links a:focus-visible {
  color: var(--color-accent);
}

.theme-toggle {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), transform 0.3s ease;
}

.theme-toggle:hover {
  border-color: var(--color-accent);
}

.theme-toggle svg {
  width: 18px;
  height: 18px;
}

.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }

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

.hero {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 140px 0 96px;
  position: relative;
  overflow: hidden;
  isolation: isolate;
}

.hero-media {
  position: absolute;
  inset: 0;
  z-index: -1;
}

.hero-photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero-scrim {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(0deg, rgba(10, 8, 6, 0.62) 0%, rgba(10, 8, 6, 0.18) 55%, rgba(10, 8, 6, 0.1) 100%),
    linear-gradient(100deg, rgba(10, 8, 6, 0.34) 0%, rgba(10, 8, 6, 0) 55%);
}

.hero-content {
  position: relative;
}

.hero-eyebrow {
  font-size: 0.8rem;
  letter-spacing: 0.18em;
  color: #f0cba9;
  margin: 0 0 24px;
  text-transform: uppercase;
}

.hero-catch {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(2.1rem, 5.4vw, 4.2rem);
  line-height: 1.35;
  margin: 0 0 32px;
  max-width: 22ch;
  letter-spacing: 0.02em;
  color: #fff;
}

.hero-lead {
  font-size: clamp(1rem, 1.6vw, 1.15rem);
  color: rgba(255, 255, 255, 0.86);
  max-width: 42ch;
  margin: 0;
}

/* ---------- Section shared ---------- */

.section {
  padding: var(--space-section) 0;
  border-top: 1px solid var(--color-border);
}

.section-inner {
  display: grid;
  grid-template-columns: minmax(0, 0.8fr) minmax(0, 1.6fr);
  gap: 64px;
}

.section-head {
  position: sticky;
  top: 120px;
  align-self: start;
}

.eyebrow {
  display: inline-block;
  font-size: 0.78rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin: 0 0 18px;
}

.section-heading {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(1.6rem, 3vw, 2.3rem);
  line-height: 1.5;
  margin: 0;
  letter-spacing: 0.02em;
}

.section-lead {
  margin: 20px 0 0;
  color: var(--color-text-soft);
  font-size: 0.98rem;
  max-width: 40ch;
}

/* ---------- Philosophy ---------- */

.philosophy-body p {
  font-size: clamp(1rem, 1.5vw, 1.12rem);
  line-height: 2.1;
  color: var(--color-text);
  margin: 0 0 28px;
  max-width: 46ch;
}

.philosophy-body p:last-child {
  margin-bottom: 0;
}

.brand-words {
  display: flex;
  gap: 40px;
  margin: 0 0 40px;
  flex-wrap: wrap;
}

.brand-word {
  border-left: 2px solid var(--color-accent);
  padding-left: 16px;
}

.brand-word dt {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  margin: 0 0 4px;
}

.brand-word dd {
  margin: 0;
  font-size: 0.85rem;
  color: var(--color-text-soft);
}

/* ---------- Business ---------- */

.business-list {
  display: flex;
  flex-direction: column;
  gap: 96px;
}

.business-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 48px;
  align-items: center;
}

.business-item:nth-child(even) .business-photo {
  order: 2;
}

.business-photo {
  aspect-ratio: 4 / 3;
  border-radius: 4px;
  position: relative;
  overflow: hidden;
  background: var(--color-bg-soft);
}

.business-photo img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.business-index {
  position: absolute;
  bottom: 16px;
  left: 16px;
  font-family: var(--font-serif);
  font-size: 0.8rem;
  color: #fff;
  letter-spacing: 0.08em;
  background: rgba(10, 8, 6, 0.4);
  backdrop-filter: blur(6px);
  padding: 4px 10px;
  border-radius: 999px;
}

.business-title {
  font-family: var(--font-serif);
  font-size: clamp(1.3rem, 2.2vw, 1.6rem);
  margin: 0 0 16px;
  font-weight: 500;
}

.business-desc {
  color: var(--color-text-soft);
  margin: 0;
  max-width: 44ch;
}

.business-instagram-link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 20px;
  color: var(--color-accent);
  font-size: 0.92rem;
  letter-spacing: 0.02em;
  text-decoration: underline;
  text-underline-offset: 3px;
  text-decoration-thickness: 1px;
  transition: opacity var(--transition);
}

.business-instagram-link::after {
  content: "↗";
  font-size: 0.85em;
  transition: transform 0.3s ease;
}

.business-instagram-link:hover,
.business-instagram-link:focus-visible {
  opacity: 0.72;
}

.business-instagram-link:hover::after,
.business-instagram-link:focus-visible::after {
  transform: translate(2px, -2px);
}

.business-thread {
  margin-top: 96px;
  padding-top: 48px;
  border-top: 1px solid var(--color-border);
  font-family: var(--font-serif);
  font-size: clamp(1.1rem, 2vw, 1.4rem);
  line-height: 1.9;
  max-width: 52ch;
  color: var(--color-text);
}

/* ---------- Company ---------- */

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

.company-table tr {
  border-top: 1px solid var(--color-border);
}

.company-table tr:last-child {
  border-bottom: 1px solid var(--color-border);
}

.company-table th,
.company-table td {
  text-align: left;
  padding: 22px 0;
  font-weight: 400;
  vertical-align: top;
}

.company-table th {
  width: 34%;
  color: var(--color-text-soft);
  font-size: 0.9rem;
  letter-spacing: 0.03em;
  padding-right: 24px;
}

.company-table td {
  font-size: 0.98rem;
}

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

.contact-section .section-inner {
  grid-template-columns: 1fr;
  text-align: center;
  justify-items: center;
}

.contact-section .section-head {
  position: static;
}

.contact-body {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 32px;
}

.mail-button {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 18px 36px;
  border-radius: 999px;
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  text-decoration: none;
  font-size: 0.95rem;
  letter-spacing: 0.03em;
  transition: transform 0.35s cubic-bezier(0.22, 1, 0.36, 1), opacity var(--transition);
}

.mail-button:hover,
.mail-button:focus-visible {
  transform: translateY(-2px);
  opacity: 0.92;
}

.mail-address {
  color: var(--color-text-soft);
  font-size: 0.9rem;
}

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

.site-footer {
  padding: 40px 0;
  border-top: 1px solid var(--color-border);
  color: var(--color-text-soft);
  font-size: 0.82rem;
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-copyright {
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 20px;
  list-style: none;
  margin: 0;
  padding: 0;
}

.footer-links a {
  text-decoration: none;
  color: var(--color-text-soft);
}

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

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

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.9s cubic-bezier(0.22, 1, 0.36, 1),
    transform 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}

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

/* ---------- Mobile nav ---------- */

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  cursor: pointer;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 4px;
}

.nav-toggle span {
  display: block;
  width: 16px;
  height: 1px;
  background: var(--color-text);
  transition: transform 0.3s ease, opacity 0.3s ease;
}

.nav-toggle[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(5px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-5px) rotate(-45deg);
}

.mobile-menu {
  position: fixed;
  top: 73px;
  left: 0;
  right: 0;
  z-index: 99;
  background: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  padding: 8px 20px 24px;
}

.mobile-menu ul {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
}

.mobile-menu a {
  display: block;
  padding: 14px 4px;
  text-decoration: none;
  color: var(--color-text);
  font-size: 1rem;
  border-bottom: 1px solid var(--color-border);
}

.mobile-menu li:last-child a {
  border-bottom: none;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
  .section-inner {
    grid-template-columns: 1fr;
  }

  .section-head {
    position: static;
  }

  .business-item,
  .business-item:nth-child(even) .business-photo {
    grid-template-columns: 1fr;
    order: 0;
  }

  .business-item {
    display: flex;
    flex-direction: column;
    align-items: stretch;
    gap: 24px;
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: 16px 20px;
  }

  .nav-links {
    display: none;
  }

  .nav-toggle {
    display: flex;
  }

  .hero {
    padding-top: 120px;
    padding-bottom: 64px;
    min-height: 92vh;
  }

  .hero-catch {
    font-size: 8.6vw;
    letter-spacing: 0;
    max-width: none;
  }

  .brand-words {
    gap: 24px;
  }

  .company-table th {
    width: 40%;
  }
}

@media (max-width: 480px) {
  .company-table tr {
    display: flex;
    flex-direction: column;
    padding: 18px 0;
  }

  .company-table th,
  .company-table td {
    padding: 4px 0;
    width: 100%;
  }
}

/* ---------- 404 page ---------- */

.not-found {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 24px;
}

.not-found h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 2.6rem);
  margin: 0 0 20px;
}

.not-found-text {
  color: var(--color-text-soft);
  margin: 0 0 32px;
  max-width: 40ch;
}