/* ============================================
   COASTLINE PERCH — 株式会社コーストラインパーチ
   Shared Stylesheet v1.0 | 2026
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Shippori+Mincho:wght@400;500;600;700;800&family=Cormorant+Garamond:ital,wght@0,300;0,400;0,500;0,600;1,300;1,400;1,500&family=Josefin+Sans:wght@100;200;300;400&family=Noto+Serif+JP:wght@300;400;500;700&display=swap');

/* ─── CSS Variables ─────────────────────────── */
:root {
  --white:        #FAFAF8;
  --fog:          #D4D6D3;
  --fog-light:    #ECEEED;
  --navy:         #1A2535;
  --navy-deep:    #0E1720;
  --stone:        #8B8880;
  --stone-light:  #B8B5B0;
  --copper:       #B07840;
  --copper-light: #D4A070;
  --sand:         #E8E2D8;
  --ink:          #1E1C1A;
  --mist:         #F2F3F1;
  --transition:   0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --font-ja:      'Shippori Mincho', 'Noto Serif JP', serif;
  --font-en:      'Cormorant Garamond', Georgia, serif;
  --font-ui:      'Josefin Sans', sans-serif;
}

/* ─── Reset & Base ──────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  background-color: var(--white);
  color: var(--ink);
  font-family: var(--font-ja);
  font-weight: 400;
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul, ol { list-style: none; }

/* ─── Navigation ────────────────────────────── */
.site-nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 0 3rem;
  height: 70px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transition: background var(--transition), backdrop-filter var(--transition);
}

.site-nav.scrolled {
  background: rgba(250, 250, 248, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(139, 136, 128, 0.15);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.nav-logo svg { width: 38px; height: 38px; }

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.nav-logo-text .en {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.15em;
  color: var(--navy);
}

.nav-logo-text .ja {
  font-family: var(--font-ja);
  font-size: 0.6rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--stone);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-family: var(--font-ui);
  font-size: 0.7rem;
  font-weight: 300;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--ink);
  opacity: 0.7;
  transition: opacity 0.3s, color 0.3s;
  position: relative;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0; right: 100%;
  height: 1px;
  background: var(--copper);
  transition: right 0.3s;
}

.nav-links a:hover { opacity: 1; color: var(--navy); }
.nav-links a:hover::after { right: 0; }
.nav-links a.active { opacity: 1; color: var(--navy); }
.nav-links a.active::after { right: 0; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 5px;
  background: none;
  border: none;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1px;
  background: var(--ink);
  transition: var(--transition);
}

/* Mobile Nav */
.mobile-menu {
  display: none;
  position: fixed;
  top: 0; left: 0; right: 0; bottom: 0;
  background: var(--navy-deep);
  z-index: 999;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 2rem;
  opacity: 0;
  transition: opacity var(--transition);
}

.mobile-menu.open {
  display: flex;
  opacity: 1;
}

.mobile-menu a {
  font-family: var(--font-ja);
  font-size: 1.4rem;
  color: var(--white);
  letter-spacing: 0.15em;
  opacity: 0.8;
  transition: opacity 0.3s, color 0.3s;
}

.mobile-menu a:hover { opacity: 1; color: var(--copper-light); }

.mobile-close {
  position: absolute;
  top: 1.5rem; right: 2rem;
  background: none;
  border: none;
  color: var(--white);
  font-size: 1.5rem;
  cursor: pointer;
  opacity: 0.7;
}

/* ─── Hero Sections ─────────────────────────── */
.hero {
  position: relative;
  width: 100%;
  height: 100vh;
  min-height: 600px;
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.hero-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}

.hero-img.loaded { transform: scale(1); }

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 16, 26, 0.1) 0%,
    rgba(10, 16, 26, 0.0) 40%,
    rgba(10, 16, 26, 0.5) 75%,
    rgba(10, 16, 26, 0.75) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: 4rem 5vw;
  width: 100%;
  max-width: 1400px;
  margin: 0 auto;
}

.hero-chapter {
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 200;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--copper-light);
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.hero-chapter::before {
  content: '';
  width: 40px;
  height: 1px;
  background: var(--copper-light);
}

.hero-title {
  font-family: var(--font-en);
  font-size: clamp(2.5rem, 6vw, 5.5rem);
  font-weight: 300;
  color: var(--white);
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 0.5rem;
}

.hero-title-ja {
  font-family: var(--font-ja);
  font-size: clamp(1rem, 2.5vw, 1.8rem);
  font-weight: 400;
  color: rgba(250, 250, 248, 0.7);
  letter-spacing: 0.2em;
  margin-bottom: 1.5rem;
}

.hero-subtitle {
  font-family: var(--font-ja);
  font-size: 0.95rem;
  color: rgba(250, 250, 248, 0.65);
  max-width: 480px;
  line-height: 2;
  letter-spacing: 0.05em;
}

/* ─── Page Header (inner pages) ─────────────── */
.page-header {
  position: relative;
  width: 100%;
  height: 60vh;
  min-height: 400px;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

.page-header-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.page-header-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(14, 23, 32, 0.3) 0%,
    rgba(14, 23, 32, 0.55) 100%
  );
}

.page-header-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 2rem;
}

.page-header-content .chapter-label {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 200;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--copper-light);
  margin-bottom: 1.2rem;
}

.page-header-content h1 {
  font-family: var(--font-en);
  font-size: clamp(2rem, 5vw, 4.5rem);
  font-weight: 300;
  color: var(--white);
  letter-spacing: 0.02em;
  line-height: 1.15;
  margin-bottom: 0.5rem;
}

.page-header-content .h1-ja {
  font-family: var(--font-ja);
  font-size: clamp(0.9rem, 2vw, 1.4rem);
  color: rgba(250, 250, 248, 0.65);
  letter-spacing: 0.25em;
  font-weight: 400;
}

/* ─── Section Layouts ───────────────────────── */
.section {
  padding: 7rem 5vw;
}

.section-sm { padding: 4rem 5vw; }
.section-lg { padding: 10rem 5vw; }

.section-navy {
  background: var(--navy-deep);
  color: var(--white);
}

.section-sand { background: var(--sand); }
.section-mist { background: var(--mist); }

.container {
  max-width: 1200px;
  margin: 0 auto;
}

.container-wide {
  max-width: 1400px;
  margin: 0 auto;
}

/* ─── Chapter Labels ────────────────────────── */
.chapter-label {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 200;
  letter-spacing: 0.45em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
}

.chapter-label::before {
  content: '';
  width: 30px;
  height: 1px;
  background: var(--copper);
}

/* ─── Typography ────────────────────────────── */
.heading-en {
  font-family: var(--font-en);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 300;
  letter-spacing: -0.02em;
  line-height: 1.15;
  color: var(--navy);
}

.heading-ja {
  font-family: var(--font-ja);
  font-size: clamp(1.4rem, 3vw, 2.4rem);
  font-weight: 500;
  letter-spacing: 0.1em;
  line-height: 1.5;
  color: var(--navy);
}

.body-text {
  font-family: var(--font-ja);
  font-size: 0.92rem;
  line-height: 2.1;
  color: var(--stone);
  letter-spacing: 0.04em;
}

.body-text-large {
  font-family: var(--font-ja);
  font-size: 1.05rem;
  line-height: 2.2;
  color: var(--stone);
  letter-spacing: 0.05em;
}

.quote {
  font-family: var(--font-en);
  font-size: clamp(1.2rem, 2.5vw, 1.8rem);
  font-weight: 300;
  font-style: italic;
  color: var(--navy);
  line-height: 1.6;
  border-left: 2px solid var(--copper);
  padding-left: 2rem;
  margin: 2rem 0;
}

/* ─── Grid Layouts ──────────────────────────── */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: center;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.grid-asymmetric {
  display: grid;
  grid-template-columns: 3fr 2fr;
  gap: 5rem;
  align-items: center;
}

.grid-asymmetric-rev {
  display: grid;
  grid-template-columns: 2fr 3fr;
  gap: 5rem;
  align-items: center;
}

/* ─── Image Blocks ──────────────────────────── */
.img-panoramic {
  width: 100%;
  height: 70vh;
  object-fit: cover;
  object-position: center;
}

.img-portrait {
  width: 100%;
  height: 500px;
  object-fit: cover;
}

.img-landscape {
  width: 100%;
  height: 380px;
  object-fit: cover;
}

.img-square {
  width: 100%;
  aspect-ratio: 1;
  object-fit: cover;
}

.img-caption {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 200;
  letter-spacing: 0.2em;
  color: var(--stone-light);
  margin-top: 0.75rem;
  text-transform: uppercase;
}

/* ─── Cards ─────────────────────────────────── */
.card {
  background: var(--white);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 60px rgba(26, 37, 53, 0.12);
}

.card-img {
  width: 100%;
  height: 280px;
  object-fit: cover;
  transition: transform 0.8s ease;
}

.card:hover .card-img { transform: scale(1.03); }

.card-body { padding: 1.5rem 0; }

.card-label {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 200;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--copper);
  margin-bottom: 0.5rem;
}

.card-title-en {
  font-family: var(--font-en);
  font-size: 1.3rem;
  font-weight: 400;
  color: var(--navy);
  margin-bottom: 0.2rem;
}

.card-title-ja {
  font-family: var(--font-ja);
  font-size: 0.85rem;
  color: var(--stone);
  letter-spacing: 0.1em;
  margin-bottom: 0.75rem;
}

.card-excerpt {
  font-family: var(--font-ja);
  font-size: 0.82rem;
  line-height: 1.9;
  color: var(--stone);
}

/* ─── Divider ───────────────────────────────── */
.divider {
  width: 100%;
  height: 1px;
  background: linear-gradient(to right, transparent, var(--fog), transparent);
  margin: 0;
}

.divider-copper {
  width: 60px;
  height: 1px;
  background: var(--copper);
  margin: 2rem 0;
}

/* ─── Number Display ────────────────────────── */
.chapter-number {
  font-family: var(--font-en);
  font-size: clamp(5rem, 12vw, 10rem);
  font-weight: 300;
  color: transparent;
  -webkit-text-stroke: 1px rgba(139, 136, 128, 0.2);
  line-height: 0.9;
  letter-spacing: -0.04em;
  pointer-events: none;
  user-select: none;
}

/* ─── Horizontal scroll hint ────────────────── */
.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  right: 3rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  z-index: 3;
}

.scroll-indicator span {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 200;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: rgba(250, 250, 248, 0.6);
}

.scroll-line {
  width: 40px;
  height: 1px;
  background: rgba(250, 250, 248, 0.4);
  position: relative;
  overflow: hidden;
}

.scroll-line::after {
  content: '';
  position: absolute;
  top: 0; left: -40px;
  width: 40px;
  height: 100%;
  background: var(--copper-light);
  animation: scrollLine 2s ease infinite;
}

@keyframes scrollLine {
  to { left: 100%; }
}

/* ─── Buttons ───────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 1rem;
  font-family: var(--font-ui);
  font-size: 0.65rem;
  font-weight: 300;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--navy);
  border: 1px solid var(--navy);
  padding: 0.85rem 2rem;
  transition: background var(--transition), color var(--transition);
  cursor: pointer;
  background: none;
}

.btn:hover {
  background: var(--navy);
  color: var(--white);
}

.btn-copper {
  color: var(--copper);
  border-color: var(--copper);
}

.btn-copper:hover {
  background: var(--copper);
  color: var(--white);
}

.btn-white {
  color: var(--white);
  border-color: rgba(250, 250, 248, 0.5);
}

.btn-white:hover {
  background: var(--white);
  color: var(--navy);
}

.btn-arrow::after {
  content: '→';
  font-family: inherit;
  font-size: 0.8rem;
}

/* ─── Footer ────────────────────────────────── */
footer {
  background: var(--navy-deep);
  color: var(--white);
  padding: 5rem 5vw 2rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 4rem;
  max-width: 1200px;
  margin: 0 auto;
  padding-bottom: 4rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}

.footer-brand svg { width: 42px; height: 42px; margin-bottom: 1rem; }

.footer-brand-name {
  font-family: var(--font-en);
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--white);
  margin-bottom: 0.25rem;
}

.footer-brand-ja {
  font-family: var(--font-ja);
  font-size: 0.7rem;
  color: var(--stone-light);
  letter-spacing: 0.1em;
  margin-bottom: 1.5rem;
}

.footer-tagline {
  font-family: var(--font-ja);
  font-size: 0.8rem;
  line-height: 2;
  color: rgba(255,255,255,0.45);
  max-width: 280px;
}

.footer-col h4 {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 300;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--copper-light);
  margin-bottom: 1.5rem;
}

.footer-col ul { display: flex; flex-direction: column; gap: 0.75rem; }

.footer-col ul li a {
  font-family: var(--font-ja);
  font-size: 0.8rem;
  color: rgba(255,255,255,0.5);
  transition: color 0.3s;
  letter-spacing: 0.05em;
}

.footer-col ul li a:hover { color: var(--white); }

.footer-col p {
  font-family: var(--font-ja);
  font-size: 0.78rem;
  color: rgba(255,255,255,0.45);
  line-height: 2;
  letter-spacing: 0.03em;
}

.footer-bottom {
  max-width: 1200px;
  margin: 0 auto;
  padding-top: 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-copyright {
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 200;
  letter-spacing: 0.2em;
  color: rgba(255,255,255,0.3);
}

/* ─── Toast Notification ────────────────────── */
.toast {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background: var(--navy);
  color: var(--white);
  padding: 1rem 1.5rem;
  font-family: var(--font-ja);
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  z-index: 9999;
  transform: translateY(100px);
  opacity: 0;
  transition: all 0.4s ease;
  border-left: 3px solid var(--copper);
  max-width: 320px;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* ─── Animations ────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

.fade-in-left {
  opacity: 0;
  transform: translateX(-30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in-left.visible {
  opacity: 1;
  transform: translateX(0);
}

.fade-in-right {
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.fade-in-right.visible {
  opacity: 1;
  transform: translateX(0);
}

/* ─── Parallax Image Container ──────────────── */
.parallax-wrap {
  overflow: hidden;
  position: relative;
}

.parallax-img {
  transform: translateY(0);
  will-change: transform;
  height: 120%;
  width: 100%;
  object-fit: cover;
  object-position: center;
}

/* ─── Gallery Grid ──────────────────────────── */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--fog);
}

.gallery-item {
  position: relative;
  overflow: hidden;
  cursor: pointer;
  background: var(--white);
}

.gallery-item img {
  width: 100%;
  height: 300px;
  object-fit: cover;
  transition: transform 0.8s ease, filter 0.5s ease;
  filter: saturate(0.85);
}

.gallery-item:hover img {
  transform: scale(1.04);
  filter: saturate(1);
}

.gallery-item-overlay {
  position: absolute;
  inset: 0;
  background: rgba(14, 23, 32, 0);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
  transition: background 0.5s;
}

.gallery-item:hover .gallery-item-overlay {
  background: rgba(14, 23, 32, 0.45);
}

.gallery-item-label {
  opacity: 0;
  transform: translateY(10px);
  transition: opacity 0.4s, transform 0.4s;
  font-family: var(--font-ui);
  font-size: 0.6rem;
  font-weight: 200;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--white);
}

.gallery-item:hover .gallery-item-label {
  opacity: 1;
  transform: translateY(0);
}

/* ─── Contact Form ──────────────────────────── */
.form-group {
  margin-bottom: 2rem;
}

.form-label {
  font-family: var(--font-ui);
  font-size: 0.62rem;
  font-weight: 200;
  letter-spacing: 0.35em;
  text-transform: uppercase;
  color: var(--stone);
  display: block;
  margin-bottom: 0.5rem;
}

.form-control {
  width: 100%;
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--fog);
  padding: 0.75rem 0;
  font-family: var(--font-ja);
  font-size: 0.92rem;
  color: var(--ink);
  transition: border-color 0.3s;
  outline: none;
}

.form-control:focus { border-color: var(--copper); }

textarea.form-control {
  resize: vertical;
  min-height: 120px;
}

/* ─── Lightbox ──────────────────────────────── */
.lightbox {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(10, 16, 26, 0.95);
  z-index: 9998;
  align-items: center;
  justify-content: center;
  cursor: pointer;
}

.lightbox.open { display: flex; }

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  cursor: default;
}

.lightbox-close {
  position: absolute;
  top: 2rem; right: 2rem;
  color: var(--white);
  font-size: 1.5rem;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.7;
  font-family: var(--font-ui);
  font-weight: 100;
}

/* ─── Responsive ────────────────────────────── */
@media (max-width: 1024px) {
  .grid-asymmetric,
  .grid-asymmetric-rev { grid-template-columns: 1fr; gap: 3rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 3rem; }
}

@media (max-width: 768px) {
  .site-nav { padding: 0 1.5rem; }
  .nav-links { display: none; }
  .nav-toggle { display: flex; }
  .grid-2,
  .grid-3 { grid-template-columns: 1fr; gap: 2rem; }
  .hero-content { padding: 3rem 1.5rem; }
  .section { padding: 5rem 1.5rem; }
  .section-lg { padding: 6rem 1.5rem; }
  .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .footer-bottom { flex-direction: column; gap: 1rem; text-align: center; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .img-panoramic { height: 50vh; }
  .img-portrait { height: 350px; }
}

@media (max-width: 480px) {
  .hero-title { font-size: 2.2rem; }
  .gallery-grid { grid-template-columns: 1fr; }
  .gallery-item img { height: 250px; }
}