/* ==========================================================================
   Churakaji Co., Ltd. — style.css
   ========================================================================== */

:root {
  --color-ocean-deep: #0a3d52;
  --color-ocean: #0f5c78;
  --color-turquoise: #1ba9a0;
  --color-turquoise-light: #4fd1c5;
  --color-coral: #e8654a;
  --color-coral-light: #f2896f;
  --color-sand: #faf6ee;
  --color-sand-deep: #f1e9d8;
  --color-ink: #16262c;
  --color-ink-soft: #4a5a60;
  --color-white: #ffffff;

  --font-serif: "Noto Serif JP", serif;
  --font-sans: "Noto Sans JP", sans-serif;

  --max-width: 1140px;
  --header-h: 76px;

  --ease: cubic-bezier(0.19, 1, 0.22, 1);
}

* { box-sizing: border-box; }

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
}

body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-ink);
  background: var(--color-sand);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }

.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.sp-only { display: none; }

@media (max-width: 720px) {
  .pc-only { display: none; }
  .sp-only { display: inline; }
}

/* ---- Progress bar ---- */
.progress-bar {
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--color-turquoise), var(--color-coral));
  z-index: 1000;
  transition: width 0.1s ease-out;
}

/* ---- Header ---- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: var(--header-h);
  z-index: 900;
  display: flex;
  align-items: center;
  background: transparent;
  transition: background 0.4s var(--ease), box-shadow 0.4s var(--ease), height 0.3s var(--ease);
}

.site-header.scrolled {
  background: rgba(250, 246, 238, 0.9);
  backdrop-filter: blur(10px);
  box-shadow: 0 2px 20px rgba(10, 61, 82, 0.08);
  height: 64px;
}

.header-inner {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  color: var(--color-white);
  transition: color 0.4s var(--ease);
}

.site-header.scrolled .logo { color: var(--color-ocean-deep); }

.logo-ja {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: 0.06em;
}

.logo-en {
  font-size: 0.6rem;
  letter-spacing: 0.14em;
  opacity: 0.75;
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 36px;
}

.main-nav a {
  font-size: 0.9rem;
  letter-spacing: 0.04em;
  color: var(--color-white);
  position: relative;
  padding: 4px 0;
  transition: color 0.4s var(--ease);
}

.site-header.scrolled .main-nav a { color: var(--color-ink); }

.main-nav a:not(.nav-cta)::after {
  content: "";
  position: absolute;
  left: 0; bottom: -2px;
  width: 0%;
  height: 1px;
  background: currentColor;
  transition: width 0.3s var(--ease);
}
.main-nav a:not(.nav-cta):hover::after { width: 100%; }

.nav-cta {
  padding: 9px 20px;
  border: 1px solid currentColor;
  border-radius: 999px;
  font-size: 0.82rem;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 32px;
  height: 32px;
  background: none;
  border: none;
  cursor: pointer;
  z-index: 950;
}

.nav-toggle span {
  display: block;
  height: 2px;
  width: 100%;
  background: var(--color-white);
  transition: transform 0.3s var(--ease), opacity 0.3s var(--ease), background 0.3s var(--ease);
}

.site-header.scrolled .nav-toggle span { background: var(--color-ink); }

.nav-toggle.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
.nav-toggle.open span { background: var(--color-ink) !important; }

/* ---- Hero ---- */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  background: radial-gradient(120% 100% at 50% 0%, #14748f 0%, var(--color-ocean) 45%, var(--color-ocean-deep) 100%);
}

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

.wave {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  height: 40%;
}

.wave path { fill: currentColor; }

.wave-1 { color: rgba(27, 169, 160, 0.35); animation: waveMove 18s ease-in-out infinite; }
.wave-2 { color: rgba(79, 209, 197, 0.25); height: 34%; animation: waveMove 14s ease-in-out infinite reverse; }
.wave-3 { color: rgba(232, 101, 74, 0.18); height: 26%; animation: waveMove 22s ease-in-out infinite; }

@keyframes waveMove {
  0%, 100% { transform: translateX(0) scaleY(1); }
  50% { transform: translateX(-3%) scaleY(1.08); }
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  color: var(--color-white);
  padding: 140px 24px 100px;
  max-width: 820px;
}

.hero-eyebrow {
  font-size: 0.78rem;
  letter-spacing: 0.32em;
  color: var(--color-turquoise-light);
  margin: 0 0 22px;
}

.hero-title {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(1.6rem, 6.5vw, 3.4rem);
  line-height: 1.55;
  margin: 0 0 28px;
  letter-spacing: 0.02em;
}

.nowrap-jp {
  white-space: nowrap;
}

.hero-lead {
  font-size: clamp(0.92rem, 1.6vw, 1.05rem);
  color: rgba(255, 255, 255, 0.85);
  margin: 0 0 44px;
  line-height: 2;
}

.hero-actions {
  display: flex;
  gap: 18px;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  display: inline-block;
  padding: 15px 36px;
  border-radius: 999px;
  font-size: 0.9rem;
  letter-spacing: 0.06em;
  transition: transform 0.35s var(--ease), background 0.35s var(--ease), color 0.35s var(--ease), box-shadow 0.35s var(--ease);
}

.btn-primary {
  background: linear-gradient(120deg, var(--color-coral), var(--color-coral-light));
  color: var(--color-white);
  box-shadow: 0 12px 30px rgba(232, 101, 74, 0.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 16px 36px rgba(232, 101, 74, 0.45); }

.btn-ghost {
  border: 1px solid rgba(255, 255, 255, 0.6);
  color: var(--color-white);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.12); transform: translateY(-3px); }

.scroll-cue {
  position: absolute;
  bottom: 34px;
  left: 50%;
  transform: translateX(-50%);
  width: 26px;
  height: 42px;
  border: 1.5px solid rgba(255, 255, 255, 0.55);
  border-radius: 20px;
  z-index: 2;
}
.scroll-cue span {
  position: absolute;
  top: 8px; left: 50%;
  width: 4px; height: 4px;
  margin-left: -2px;
  background: var(--color-white);
  border-radius: 50%;
  animation: scrollCue 1.8s ease-in-out infinite;
}
@keyframes scrollCue {
  0% { opacity: 1; top: 8px; }
  70% { opacity: 0.2; top: 22px; }
  100% { opacity: 0; top: 22px; }
}

/* ---- Section generic ---- */
.section { padding: 120px 0; position: relative; }

.section-head { margin-bottom: 64px; text-align: center; }
.section-head.light .section-eyebrow { color: var(--color-turquoise-light); }
.section-head.light .section-title { color: var(--color-white); }

.section-eyebrow {
  font-size: 0.75rem;
  letter-spacing: 0.32em;
  color: var(--color-turquoise);
  font-weight: 500;
  margin: 0 0 14px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 3vw, 2.1rem);
  font-weight: 700;
  color: var(--color-ocean-deep);
  margin: 0;
  letter-spacing: 0.04em;
}

/* ---- About ---- */
.about-grid {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 70px;
  align-items: center;
}

.about-text p {
  color: var(--color-ink-soft);
  font-size: 1rem;
  margin: 0 0 26px;
}
.about-text strong { color: var(--color-coral); font-weight: 500; }

.about-visual {
  display: flex;
  justify-content: center;
}

.kanji-mark {
  display: flex;
  gap: 14px;
  padding: 46px 40px;
  border-radius: 24px;
  background: linear-gradient(160deg, var(--color-sand-deep), var(--color-sand));
  box-shadow: inset 0 0 0 1px rgba(10, 61, 82, 0.06);
}

.kanji-mark span {
  font-family: var(--font-serif);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-ocean);
  opacity: 0.85;
}
.kanji-mark span:nth-child(2) { color: var(--color-turquoise); transform: translateY(14px); }
.kanji-mark span:nth-child(3) { color: var(--color-coral); }

/* ---- Services ---- */
.services { background: var(--color-white); }

.service-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 28px;
}

.service-card {
  padding: 44px 38px;
  border-radius: 20px;
  background: var(--color-sand);
  transition: transform 0.4s var(--ease), box-shadow 0.4s var(--ease), background 0.4s var(--ease);
}

.service-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 18px 40px rgba(10, 61, 82, 0.1);
  background: var(--color-white);
}

.service-num {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  color: var(--color-coral);
  letter-spacing: 0.1em;
  margin-bottom: 18px;
}

.service-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  color: var(--color-ocean-deep);
  margin: 0 0 14px;
  letter-spacing: 0.02em;
}

.service-card p {
  color: var(--color-ink-soft);
  font-size: 0.92rem;
  margin: 0;
}

/* ---- Message ---- */
.message {
  background: linear-gradient(165deg, var(--color-ocean-deep) 0%, #0d4a63 55%, var(--color-ocean) 100%);
  color: var(--color-white);
}

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

.message-quote {
  font-size: 1.02rem;
  color: rgba(255, 255, 255, 0.9);
  margin: 0 0 30px;
}

.message-sign {
  margin-top: 50px;
  padding-top: 34px;
  border-top: 1px solid rgba(255, 255, 255, 0.2);
}

.company-name {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  margin: 0 0 8px;
  letter-spacing: 0.04em;
}

.rep-names {
  font-size: 0.88rem;
  color: rgba(255, 255, 255, 0.7);
  margin: 0;
}

.name-origin {
  max-width: 760px;
  margin: 90px auto 0;
  text-align: center;
  padding: 42px 44px;
  border-radius: 20px;
  background: rgba(255, 255, 255, 0.06);
  backdrop-filter: blur(6px);
}

.name-origin h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  margin: 0 0 18px;
  color: var(--color-turquoise-light);
  letter-spacing: 0.06em;
}

.name-origin p {
  margin: 0;
  color: rgba(255, 255, 255, 0.85);
  font-size: 0.94rem;
}

.name-origin .hl { color: var(--color-coral-light); font-weight: 500; }

/* ---- Company ---- */
.company-table {
  max-width: 860px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  background: var(--color-white);
  box-shadow: 0 20px 50px rgba(10, 61, 82, 0.08);
}

.company-table dl { margin: 0; }

.company-table .row {
  display: grid;
  grid-template-columns: 180px 1fr;
  padding: 26px 40px;
  border-bottom: 1px solid var(--color-sand-deep);
}
.company-table .row:last-child { border-bottom: none; }

.company-table dt {
  font-family: var(--font-serif);
  font-weight: 500;
  color: var(--color-ocean);
  font-size: 0.92rem;
  letter-spacing: 0.04em;
}

.company-table dd {
  margin: 0;
  color: var(--color-ink-soft);
  font-size: 0.94rem;
}

.company-table dd a { color: var(--color-coral); }
.company-table dd a:hover { text-decoration: underline; }

/* ---- Contact ---- */
.contact { background: var(--color-white); }

.contact-box {
  max-width: 600px;
  margin: 0 auto;
  text-align: center;
  padding: 60px 40px;
  border-radius: 24px;
  background: linear-gradient(160deg, var(--color-sand-deep), var(--color-sand));
}

.contact-box p {
  color: var(--color-ink-soft);
  margin: 0 0 26px;
}

.contact-mail {
  display: inline-block;
  font-family: var(--font-serif);
  font-size: 1.25rem;
  color: var(--color-ocean-deep);
  padding: 16px 40px;
  border-radius: 999px;
  background: var(--color-white);
  box-shadow: 0 10px 26px rgba(10, 61, 82, 0.12);
  transition: transform 0.35s var(--ease), box-shadow 0.35s var(--ease), color 0.35s var(--ease);
}
.contact-mail:hover {
  transform: translateY(-3px);
  box-shadow: 0 14px 32px rgba(232, 101, 74, 0.25);
  color: var(--color-coral);
}

/* ---- Footer ---- */
.site-footer {
  background: var(--color-ocean-deep);
  color: rgba(255, 255, 255, 0.7);
  padding: 44px 0;
}

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

.footer-logo {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  color: var(--color-white);
  margin: 0;
  letter-spacing: 0.06em;
}

.footer-copy {
  font-size: 0.78rem;
  margin: 0;
  letter-spacing: 0.03em;
}

/* ---- Reveal on scroll ---- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s var(--ease), transform 0.9s var(--ease);
}
.reveal.in-view {
  opacity: 1;
  transform: translateY(0);
}

/* ---- Responsive ---- */
@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; gap: 48px; }
  .about-visual { order: -1; }
  .service-grid { grid-template-columns: 1fr; }
  .section { padding: 92px 0; }
}

@media (max-width: 720px) {
  .header-inner { padding: 0 22px; }
  .container { padding: 0 22px; }

  .main-nav {
    position: fixed;
    inset: 0;
    top: 0;
    background: var(--color-ocean-deep);
    flex-direction: column;
    justify-content: center;
    gap: 32px;
    transform: translateX(100%);
    transition: transform 0.4s var(--ease);
  }
  .main-nav.open { transform: translateX(0); }
  .main-nav a { color: var(--color-white) !important; font-size: 1.2rem; }
  .nav-cta { border-color: var(--color-white); }

  .nav-toggle { display: flex; }

  .company-table .row { grid-template-columns: 1fr; gap: 6px; padding: 22px 26px; }
  .name-origin { padding: 34px 26px; margin-top: 60px; }
  .kanji-mark { padding: 36px 28px; }
  .kanji-mark span { font-size: 2.2rem; }
}

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