/* =========================================================
   Three Mountains - Global Stylesheet
   Brand: Deep Navy × Earth Gold, Mountain-inspired
   ========================================================= */

:root {
  --color-primary: #0f2942;       /* deep mountain navy */
  --color-primary-light: #1c3d5a;
  --color-accent: #c9a14a;        /* earth gold */
  --color-accent-light: #e0c074;
  --color-text: #1a1a1a;
  --color-text-muted: #5a6a78;
  --color-bg: #ffffff;
  --color-bg-alt: #f6f4ef;        /* warm off-white */
  --color-bg-dark: #0a1c2e;
  --color-border: #e3dccd;

  --font-jp: "Noto Serif JP", "Yu Mincho", "游明朝", "YuMincho", serif;
  --font-sans: "Noto Sans JP", -apple-system, BlinkMacSystemFont, "Helvetica Neue", Arial, sans-serif;

  --max-width: 1180px;
  --section-pad-y: 110px;
  --radius: 4px;
  --shadow-md: 0 10px 40px rgba(15, 41, 66, 0.08);
  --shadow-lg: 0 20px 60px rgba(15, 41, 66, 0.14);

  --transition: 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: var(--font-sans);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

img { max-width: 100%; height: auto; display: block; }
a { color: var(--color-primary); text-decoration: none; transition: color var(--transition); }
a:hover { color: var(--color-accent); }

h1, h2, h3, h4 {
  font-family: var(--font-jp);
  color: var(--color-primary);
  font-weight: 600;
  letter-spacing: 0.04em;
  line-height: 1.4;
}

p { margin: 0 0 1em; }

/* ---------- Layout ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}
.section { padding: var(--section-pad-y) 0; }
.section-alt { background: var(--color-bg-alt); }
.section-dark {
  background: var(--color-bg-dark);
  color: #e5ecf2;
}
.section-dark h1,
.section-dark h2,
.section-dark h3 { color: #fff; }

/* ---------- Header / Nav ---------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 22px 0;
  background: rgba(255, 255, 255, 0.0);
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}
.site-header.scrolled {
  background: rgba(255, 255, 255, 0.96);
  padding: 14px 0;
  box-shadow: 0 2px 20px rgba(0,0,0,0.06);
  backdrop-filter: blur(6px);
}
.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}
.brand {
  font-family: var(--font-jp);
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  letter-spacing: 0.12em;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand-mark {
  display: inline-block;
  width: 26px; height: 26px;
}
.brand-logo {
  height: 60px;
  width: auto;
}
.site-header.scrolled .brand { color: var(--color-primary); }
.site-header.scrolled .brand-mark path { stroke: var(--color-primary); }

.nav-menu {
  display: flex;
  gap: 36px;
  list-style: none;
  margin: 0; padding: 0;
}
.nav-menu a {
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.1em;
  font-weight: 500;
  position: relative;
}
.nav-menu a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -6px;
  width: 0; height: 1px;
  background: var(--color-accent);
  transition: width var(--transition);
}
.nav-menu a:hover::after { width: 100%; }
.site-header.scrolled .nav-menu a { color: var(--color-primary); }

.nav-cta {
  background: var(--color-accent);
  color: #fff !important;
  padding: 10px 22px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.1em;
}
.nav-cta:hover { background: var(--color-accent-light); color: #fff !important; }
.nav-cta::after { display: none; }

.nav-toggle {
  display: none;
  width: 32px; height: 32px;
  background: none; border: 0;
  cursor: pointer;
  padding: 0;
}
.nav-toggle span {
  display: block;
  width: 100%; height: 2px;
  background: #fff;
  margin: 6px 0;
  transition: var(--transition);
}
.site-header.scrolled .nav-toggle span { background: var(--color-primary); }

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  color: #fff;
  overflow: hidden;
}
.hero-bg {
  position: absolute; inset: 0;
  background-size: cover;
  background-position: center;
  z-index: 0;
}
.hero-bg::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,28,46,0.75) 0%, rgba(15,41,66,0.45) 100%);
}
.hero-content {
  position: relative; z-index: 2;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  width: 100%;
}
.hero-eyebrow {
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--color-accent-light);
  font-weight: 500;
  text-transform: uppercase;
  margin-bottom: 24px;
  display: inline-block;
  padding-left: 60px;
  position: relative;
}
.hero-eyebrow::before {
  content: "";
  position: absolute;
  left: 0; top: 50%;
  width: 44px; height: 1px;
  background: var(--color-accent);
}
.hero h1 {
  font-size: clamp(34px, 5.4vw, 64px);
  color: #fff;
  margin: 0 0 28px;
  font-weight: 600;
  line-height: 1.35;
  letter-spacing: 0.05em;
}
.hero h1 .accent { color: var(--color-accent-light); }
.hero-lead {
  font-size: clamp(15px, 1.6vw, 19px);
  max-width: 640px;
  margin-bottom: 44px;
  color: rgba(255,255,255,0.9);
  line-height: 1.9;
}
.hero-actions { display: flex; gap: 18px; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-block;
  padding: 16px 34px;
  font-size: 14px;
  letter-spacing: 0.14em;
  font-weight: 600;
  border-radius: var(--radius);
  transition: all var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  text-align: center;
}
.btn-primary {
  background: var(--color-accent);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent-light);
  color: #fff;
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}
.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255,255,255,0.5);
}
.btn-outline:hover {
  background: #fff;
  color: var(--color-primary);
}
.btn-dark {
  background: var(--color-primary);
  color: #fff;
}
.btn-dark:hover {
  background: var(--color-primary-light);
  color: #fff;
}

/* ---------- Section Heading ---------- */
.section-head { text-align: center; margin-bottom: 70px; }
.section-eyebrow {
  font-size: 13px;
  letter-spacing: 0.32em;
  color: var(--color-accent);
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 18px;
  display: inline-block;
}
.section-title {
  font-size: clamp(28px, 3.5vw, 42px);
  margin: 0 0 20px;
}
.section-lead {
  max-width: 720px;
  margin: 0 auto;
  color: var(--color-text-muted);
  font-size: 16px;
}
.section-dark .section-eyebrow { color: var(--color-accent-light); }
.section-dark .section-lead { color: rgba(255,255,255,0.75); }

/* ---------- Service Cards ---------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.service-card {
  background: #fff;
  padding: 48px 38px;
  border-radius: var(--radius);
  border: 1px solid var(--color-border);
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}
.service-card::before {
  content: "";
  position: absolute;
  left: 0; top: 0;
  width: 100%; height: 3px;
  background: var(--color-accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.service-card:hover::before { transform: scaleX(1); }
.service-num {
  font-family: var(--font-jp);
  font-size: 14px;
  color: var(--color-accent);
  letter-spacing: 0.2em;
  margin-bottom: 18px;
  display: block;
}
.service-card h3 {
  font-size: 22px;
  margin: 0 0 18px;
}
.service-card p {
  color: var(--color-text-muted);
  font-size: 15px;
  margin: 0;
}

/* ---------- Feature with image ---------- */
.feature-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
  margin-bottom: 120px;
}
.feature-row:last-child { margin-bottom: 0; }
.feature-row.reverse { direction: rtl; }
.feature-row.reverse > * { direction: ltr; }
.feature-img {
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  aspect-ratio: 4/3;
  background-size: cover;
  background-position: center;
}
.feature-text .section-eyebrow { margin-bottom: 14px; }
.feature-text h3 {
  font-size: clamp(24px, 2.6vw, 32px);
  margin: 0 0 24px;
}
.feature-text p {
  color: var(--color-text-muted);
  font-size: 16px;
  line-height: 1.95;
}
.feature-list {
  list-style: none; padding: 0; margin: 28px 0 0;
}
.feature-list li {
  padding: 12px 0 12px 32px;
  position: relative;
  border-bottom: 1px solid var(--color-border);
  font-size: 15px;
}
.feature-list li::before {
  content: "▲";
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  color: var(--color-accent);
  font-size: 10px;
}

/* ---------- Stats ---------- */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 40px;
  text-align: center;
}
.stat-num {
  font-family: var(--font-jp);
  font-size: clamp(38px, 5vw, 60px);
  color: var(--color-accent-light);
  font-weight: 600;
  line-height: 1;
  display: block;
  margin-bottom: 14px;
}
.stat-label {
  font-size: 13px;
  letter-spacing: 0.16em;
  color: rgba(255,255,255,0.8);
}

/* ---------- Works / Cases ---------- */
.works-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 36px;
}
.work-card {
  background: #fff;
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}
.work-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}
.work-thumb {
  aspect-ratio: 16/9;
  background-size: cover;
  background-position: center;
}
.work-body { padding: 32px 32px 36px; }
.work-tag {
  display: inline-block;
  font-size: 11px;
  letter-spacing: 0.18em;
  background: var(--color-bg-alt);
  color: var(--color-primary);
  padding: 4px 12px;
  border-radius: 2px;
  margin-bottom: 16px;
  font-weight: 600;
}
.work-card h3 { font-size: 20px; margin: 0 0 14px; }
.work-card p { color: var(--color-text-muted); font-size: 14px; margin: 0; }

/* ---------- Profile ---------- */
.profile-grid {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
  align-items: start;
}
.profile-img {
  border-radius: var(--radius);
  overflow: hidden;
  aspect-ratio: 3/4;
  background-size: cover;
  background-position: center;
  box-shadow: var(--shadow-lg);
}
.profile-text h2 { margin-top: 0; }
.profile-name {
  font-family: var(--font-jp);
  font-size: 28px;
  color: var(--color-primary);
  margin: 0 0 6px;
}
.profile-title {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-bottom: 30px;
}
.career-list {
  list-style: none;
  padding: 0;
  margin: 30px 0 0;
}
.career-list li {
  display: flex;
  gap: 24px;
  padding: 18px 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 14px;
  line-height: 1.7;
}
.career-year {
  flex: 0 0 110px;
  color: var(--color-accent);
  font-weight: 600;
  font-family: var(--font-jp);
}

/* ---------- Contact / Form ---------- */
.contact-wrap {
  display: grid;
  grid-template-columns: 1fr 1.4fr;
  gap: 80px;
}
.contact-info h2 { margin-top: 0; }
.contact-info p { color: var(--color-text-muted); }
.contact-meta { margin-top: 36px; list-style: none; padding: 0; }
.contact-meta li { padding: 14px 0; border-bottom: 1px solid var(--color-border); font-size: 14px; }
.contact-meta strong { display: block; font-size: 11px; letter-spacing: 0.2em; color: var(--color-accent); margin-bottom: 6px; }

.form-group { margin-bottom: 24px; }
.form-group label {
  display: block;
  font-size: 13px;
  letter-spacing: 0.1em;
  font-weight: 600;
  color: var(--color-primary);
  margin-bottom: 10px;
}
.form-group label .req { color: #c8543b; font-size: 11px; margin-left: 6px; }
.form-control {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 15px;
  font-family: inherit;
  background: #fff;
  transition: border-color var(--transition);
}
.form-control:focus {
  outline: none;
  border-color: var(--color-accent);
}
textarea.form-control { min-height: 160px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; }

/* ---------- CTA strip ---------- */
.cta-strip {
  position: relative;
  background-size: cover;
  background-position: center;
  color: #fff;
  text-align: center;
  padding: 100px 0;
}
.cta-strip::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(180deg, rgba(10,28,46,0.85), rgba(15,41,66,0.7));
}
.cta-strip > .container { position: relative; z-index: 2; }
.cta-strip h2 { color: #fff; font-size: clamp(26px, 3.2vw, 38px); margin: 0 0 18px; }
.cta-strip p { color: rgba(255,255,255,0.85); margin-bottom: 36px; max-width: 620px; margin-left: auto; margin-right: auto; }

/* ---------- Footer ---------- */
.site-footer {
  background: var(--color-bg-dark);
  color: rgba(255,255,255,0.7);
  padding: 80px 0 30px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr;
  gap: 50px;
  margin-bottom: 60px;
}
.footer-grid h4 {
  color: #fff;
  font-size: 14px;
  letter-spacing: 0.18em;
  margin: 0 0 22px;
  font-family: var(--font-sans);
  font-weight: 600;
}
.footer-grid ul { list-style: none; padding: 0; margin: 0; }
.footer-grid li { margin-bottom: 12px; font-size: 14px; }
.footer-grid a { color: rgba(255,255,255,0.7); }
.footer-grid a:hover { color: var(--color-accent-light); }
.footer-brand .brand { color: #fff; margin-bottom: 16px; }
.footer-brand p { font-size: 13px; line-height: 1.9; color: rgba(255,255,255,0.6); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.1);
  padding-top: 28px;
  font-size: 12px;
  text-align: center;
  color: rgba(255,255,255,0.5);
  letter-spacing: 0.08em;
}

/* ---------- Page Header (sub pages) ---------- */
.page-header {
  position: relative;
  min-height: 56vh;
  display: flex;
  align-items: center;
  color: #fff;
  background-size: cover;
  background-position: center;
  padding-top: 90px;
}
.page-header::after {
  content: "";
  position: absolute; inset: 0;
  background: linear-gradient(135deg, rgba(10,28,46,0.78), rgba(15,41,66,0.5));
}
.page-header .container { position: relative; z-index: 2; }
.page-header h1 {
  color: #fff;
  font-size: clamp(32px, 4.6vw, 54px);
  margin: 0 0 14px;
}
.page-header p {
  font-size: 14px;
  letter-spacing: 0.24em;
  color: var(--color-accent-light);
  text-transform: uppercase;
  margin: 0;
}

/* ---------- Reveal animations ---------- */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s ease, transform 0.9s cubic-bezier(0.2, 0.8, 0.2, 1);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  :root { --section-pad-y: 80px; }
  .services-grid { grid-template-columns: 1fr; }
  .feature-row, .profile-grid, .contact-wrap {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .feature-row.reverse { direction: ltr; }
  .works-grid { grid-template-columns: 1fr; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 28px; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 36px; }
  .form-row { grid-template-columns: 1fr; }

  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 0; right: -100%;
    width: 80%; max-width: 320px;
    height: 100vh;
    background: #fff;
    flex-direction: column;
    padding: 100px 36px 40px;
    gap: 8px;
    box-shadow: -10px 0 40px rgba(0,0,0,0.1);
    transition: right var(--transition);
  }
  .nav-menu.is-open { right: 0; }
  .nav-menu a { color: var(--color-primary); padding: 14px 0; display: block; }
  .nav-cta { margin-top: 16px; text-align: center; }
}
@media (max-width: 560px) {
  .container { padding: 0 22px; }
  .nav-inner { padding: 0 22px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { padding: 14px 24px; }
  .footer-grid { grid-template-columns: 1fr; }
}