/* =====================================================
   FUSHIMI ARCHITECTS - Stylesheet
   Japanese Modernist Architecture Studio
   ===================================================== */

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

html {
  scroll-behavior: smooth;
}

:root {
  --bg: #F5F2EC;         /* 生成り */
  --bg-soft: #EDE8DE;    /* 淡い生成り */
  --ink: #1A1715;        /* 墨色 */
  --ink-soft: #3D3833;   /* 薄墨 */
  --line: #C9C1B0;       /* 罫線 */
  --accent: #7C2E1F;     /* 弁柄色 (朱に近いが渋い) */
  --serif-en: 'Cormorant Garamond', serif;
  --serif-jp: 'Shippori Mincho B1', serif;
  --sans-jp: 'Noto Sans JP', sans-serif;
}

body {
  font-family: var(--serif-jp);
  color: var(--ink);
  background: var(--bg);
  line-height: 2;
  -webkit-font-smoothing: antialiased;
  font-weight: 300;
  overflow-x: hidden;
}

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

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

ul, ol {
  list-style: none;
}


/* ---------- Utilities ---------- */
.container {
  width: 88%;
  max-width: 1200px;
  margin: 0 auto;
}

.label-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 0.95rem;
  letter-spacing: 0.1em;
  color: var(--ink-soft);
}

.label-jp {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: 1rem;
  letter-spacing: 0.3em;
  color: var(--ink);
}

.section-head {
  margin-bottom: 6rem;
}

.section-head .label-en {
  display: block;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0.25em;
  line-height: 1;
}


/* ---------- Reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition:
    opacity 1.4s cubic-bezier(0.22, 1, 0.36, 1),
    transform 1.4s cubic-bezier(0.22, 1, 0.36, 1);
}

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

.reveal-delay-1 { transition-delay: 0.2s; }


/* ---------- Header / Nav ---------- */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.8rem 0;
  transition: all 0.5s ease;
}

header.scrolled {
  background: rgba(245, 242, 236, 0.94);
  backdrop-filter: blur(14px);
  padding: 1.2rem 0;
  border-bottom: 1px solid var(--line);
}

.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
  color: #fff;
  transition: color 0.5s ease;
}

header.scrolled .logo {
  color: var(--ink);
}

.logo-jp {
  font-family: var(--serif-jp);
  font-weight: 500;
  font-size: 1.05rem;
  letter-spacing: 0.2em;
}

.logo-en {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  margin-top: 0.15rem;
  opacity: 0.8;
}

.nav-links {
  display: flex;
  gap: 2.8rem;
}

.nav-links a {
  font-family: var(--serif-jp);
  font-size: 0.95rem;
  font-weight: 400;
  letter-spacing: 0.25em;
  color: #fff;
  position: relative;
  padding-bottom: 4px;
  transition: color 0.4s ease, opacity 0.3s ease;
}

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

.nav-links a:hover {
  opacity: 0.6;
}

.hamburger {
  display: none;
  width: 28px;
  height: 14px;
  position: relative;
  cursor: pointer;
  background: none;
  border: none;
  z-index: 101;
}

.hamburger span {
  display: block;
  position: absolute;
  left: 0;
  right: 0;
  height: 1px;
  background: #fff;
  transition: all 0.4s ease;
}

header.scrolled .hamburger span {
  background: var(--ink);
}

.hamburger span:nth-child(1) { top: 0; }
.hamburger span:nth-child(2) { bottom: 0; }

.hamburger.open span:nth-child(1) {
  top: 50%;
  transform: translateY(-50%) rotate(45deg);
  background: var(--ink);
}

.hamburger.open span:nth-child(2) {
  bottom: 50%;
  transform: translateY(50%) rotate(-45deg);
  background: var(--ink);
}


/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 680px;
  overflow: hidden;
  display: flex;
  align-items: center;
  color: #fff;
}

.hero-image {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  animation: heroZoom 20s ease-out forwards;
}

.hero::after {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(
    180deg,
    rgba(0, 0, 0, 0.25) 0%,
    rgba(0, 0, 0, 0.1) 40%,
    rgba(0, 0, 0, 0.55) 100%
  );
}

@keyframes heroZoom {
  from { transform: scale(1.1); }
  to { transform: scale(1); }
}

.hero-content {
  position: relative;
  z-index: 2;
  width: 100%;
  padding-top: 5rem;
}

.hero-kanji {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: clamp(4rem, 10vw, 8rem);
  line-height: 1;
  opacity: 0;
  animation: fadeIn 2s ease 0.4s forwards;
  margin-bottom: 2rem;
  color: rgba(255, 255, 255, 0.92);
}

.hero-title {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.hero-title .jp {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: clamp(2rem, 4.5vw, 3.5rem);
  letter-spacing: 0.1em;
  line-height: 1.3;
  opacity: 0;
  animation: fadeUp 1.6s ease 0.8s forwards;
}

.hero-title .en {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: clamp(1rem, 1.5vw, 1.3rem);
  letter-spacing: 0.15em;
  opacity: 0;
  animation: fadeUp 1.6s ease 1.1s forwards;
}

.hero-title .en em {
  font-style: italic;
  opacity: 0.85;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(25px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero-footer {
  position: absolute;
  bottom: 2.5rem;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-between;
  z-index: 2;
  font-family: var(--serif-en);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  color: rgba(255, 255, 255, 0.7);
  opacity: 0;
  animation: fadeIn 1.6s ease 1.5s forwards;
}


/* ---------- About / 思想 ---------- */
.about {
  padding: 12rem 0 10rem;
}

.about-inner {
  display: grid;
  grid-template-columns: 240px 1fr;
  gap: 6rem;
  align-items: start;
}

.about-label {
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  padding-top: 0.5rem;
}

.about-lead {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: clamp(1.8rem, 3.5vw, 2.8rem);
  line-height: 1.8;
  letter-spacing: 0.1em;
  margin-bottom: 3.5rem;
  color: var(--ink);
}

.about-text {
  max-width: 620px;
}

.about-text p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  margin-bottom: 1.8rem;
  letter-spacing: 0.05em;
}

.about-text em {
  font-style: normal;
  color: var(--accent);
  font-weight: 400;
}


/* ---------- Works / 作品 ---------- */
.works {
  padding: 10rem 0;
}

.works-list {
  display: flex;
  flex-direction: column;
  gap: 8rem;
}

.work-item {
  display: grid;
  grid-template-columns: 1.3fr 1fr;
  gap: 4rem;
  align-items: center;
}

.work-item.reversed {
  grid-template-columns: 1fr 1.3fr;
}

.work-item.reversed .work-image {
  order: 2;
}

.work-image {
  overflow: hidden;
  aspect-ratio: 4 / 3;
}

.work-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 1.2s cubic-bezier(0.22, 1, 0.36, 1);
}

.work-item:hover .work-image img {
  transform: scale(1.04);
}

.work-info {
  padding: 0 1rem;
}

.work-meta {
  display: flex;
  gap: 1.5rem;
  margin-bottom: 1.5rem;
  font-family: var(--serif-en);
  font-size: 0.8rem;
  letter-spacing: 0.2em;
  color: var(--accent);
}

.work-meta span::after {
  content: "／";
  margin-left: 1.5rem;
  color: var(--line);
}

.work-meta span:last-child::after {
  display: none;
}

.work-info h3 {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: clamp(1.6rem, 2.8vw, 2.2rem);
  letter-spacing: 0.15em;
  margin-bottom: 1.5rem;
  line-height: 1.5;
}

.work-info p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 2;
}

.work-info em {
  font-style: normal;
  color: var(--accent);
}


/* ---------- Services / 業務 ---------- */
.services {
  padding: 10rem 0;
  background: var(--bg-soft);
}

.services-list {
  display: flex;
  flex-direction: column;
}

.service-row {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  padding: 3.5rem 0;
  border-top: 1px solid var(--line);
  align-items: start;
}

.service-row:last-child {
  border-bottom: 1px solid var(--line);
}

.service-en {
  font-family: var(--serif-en);
  font-style: italic;
  font-weight: 300;
  font-size: 1.1rem;
  letter-spacing: 0.1em;
  color: var(--accent);
  padding-top: 0.5rem;
}

.service-jp h3 {
  font-family: var(--serif-jp);
  font-weight: 400;
  font-size: 1.5rem;
  letter-spacing: 0.2em;
  margin-bottom: 1rem;
}

.service-jp p {
  font-size: 0.95rem;
  color: var(--ink-soft);
  max-width: 580px;
}


/* ---------- Contact / 連絡 ---------- */
.contact {
  padding: 10rem 0;
}

.contact-inner {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 6rem;
  align-items: start;
}

.contact-left .label-en {
  display: block;
  margin-bottom: 1.5rem;
}

.contact-title {
  font-family: var(--serif-jp);
  font-weight: 300;
  font-size: clamp(2rem, 4.5vw, 3.3rem);
  letter-spacing: 0.1em;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.contact-lead {
  font-size: 0.95rem;
  color: var(--ink-soft);
  max-width: 500px;
}

.contact-info dt {
  font-family: var(--serif-en);
  font-style: italic;
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--accent);
  margin-bottom: 0.5rem;
  margin-top: 2rem;
}

.contact-info dt:first-child {
  margin-top: 0;
}

.contact-info dd {
  font-family: var(--serif-jp);
  font-size: 1.05rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  padding-bottom: 1.8rem;
  border-bottom: 1px solid var(--line);
  line-height: 1.8;
}

.contact-info dd:last-child {
  border-bottom: none;
}

.contact-info dd a {
  transition: color 0.3s ease;
}

.contact-info dd a:hover {
  color: var(--accent);
}


/* ---------- Footer ---------- */
footer {
  padding: 3rem 0;
  background: var(--ink);
  color: var(--bg);
}

.footer-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 2rem;
}

.footer-left {
  display: flex;
  flex-direction: column;
  line-height: 1.4;
}

.footer-logo-jp {
  font-family: var(--serif-jp);
  font-weight: 500;
  font-size: 1rem;
  letter-spacing: 0.2em;
}

.footer-logo-en {
  font-family: var(--serif-en);
  font-weight: 300;
  font-size: 0.7rem;
  letter-spacing: 0.25em;
  opacity: 0.7;
  margin-top: 0.2rem;
}

.copyright {
  font-family: var(--serif-en);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  opacity: 0.5;
}


/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .about { padding: 7rem 0 5rem; }
  .about-inner { grid-template-columns: 1fr; gap: 2.5rem; }

  .works { padding: 6rem 0; }
  .works-list { gap: 4rem; }
  .work-item,
  .work-item.reversed {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .work-item.reversed .work-image { order: initial; }
  .work-info { padding: 0; }

  .services { padding: 6rem 0; }
  .service-row {
    grid-template-columns: 1fr;
    gap: 1rem;
    padding: 2.5rem 0;
  }

  .contact { padding: 6rem 0; }
  .contact-inner { grid-template-columns: 1fr; gap: 3rem; }

  .hamburger { display: block; }
  .nav-links {
    position: fixed;
    top: 0;
    right: 0;
    width: 80%;
    max-width: 340px;
    height: 100vh;
    background: var(--bg);
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
    padding: 3rem;
    gap: 2rem;
    transform: translateX(100%);
    transition: transform 0.5s cubic-bezier(0.7, 0, 0.3, 1);
    box-shadow: -20px 0 60px -20px rgba(0, 0, 0, 0.2);
  }
  .nav-links.open { transform: translateX(0); }
  .nav-links a { color: var(--ink); }
  header.scrolled .nav-links a { color: var(--ink); }
}

@media (max-width: 600px) {
  .hero-content { padding-top: 3rem; }
  .hero-footer {
    flex-direction: column;
    gap: 0.5rem;
    bottom: 1.5rem;
  }
  .footer-inner {
    flex-direction: column;
    text-align: center;
    gap: 1.2rem;
  }
}