:root {
  --ink: #1a1a1a;
  --paper: #f5f0e8;
  --paper-light: #faf7f2;
  --accent: #8b4513;
  --accent-light: #a0522d;
  --slate: #3a3a3a;
  --muted: #7a7267;
  --border: #d4cec4;
  --gold: #b8860b;
  --deep-navy: #1c2833;
  --warm-gray: #e8e2d8;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

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

body {
  font-family: 'Noto Serif JP', 'Zen Old Mincho', serif;
  color: var(--ink);
  background: var(--paper);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* ===== LOADING SCREEN ===== */
.loading-screen {
  position: fixed;
  inset: 0;
  background: var(--deep-navy);
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  transition: opacity 0.8s ease, visibility 0.8s ease;
}
.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
}
.loading-logo {
  font-family: 'Zen Old Mincho', serif;
  font-size: 3rem;
  color: var(--paper);
  letter-spacing: 1.5rem;
  animation: breathe 2s ease-in-out infinite;
}
.loading-sub {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.85rem;
  color: rgba(245,240,232,0.5);
  letter-spacing: 0.5rem;
  margin-top: 1rem;
}
@keyframes breathe {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

/* ===== HEADER ===== */
header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: 1.2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transition: all 0.5s ease;
  background: transparent;
}
header.scrolled {
  background: rgba(28, 40, 51, 0.95);
  backdrop-filter: blur(10px);
  padding: 0.8rem 3rem;
}
.header-logo {
  font-family: 'Zen Old Mincho', serif;
  font-size: 1.5rem;
  color: var(--paper);
  letter-spacing: 0.5rem;
  text-decoration: none;
  transition: opacity 0.3s;
  display: flex;
  align-items: center;
  gap: 0.9rem;
}
.header-logo:hover { opacity: 0.7; }
.header-logo-mark {
  height: 44px;
  width: auto;
  display: block;
  filter: drop-shadow(0 0 6px rgba(184,134,11,0.15));
  transition: transform 0.5s ease;
}
.header-logo:hover .header-logo-mark {
  transform: rotate(-6deg);
}
.header-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}
.header-logo-text span {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.65rem;
  display: block;
  letter-spacing: 0.3rem;
  color: rgba(245,240,232,0.6);
  margin-top: 0.35rem;
}

nav ul {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}
nav a {
  color: rgba(245,240,232,0.8);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 0.2rem;
  transition: color 0.3s;
  position: relative;
}
nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--gold);
  transition: width 0.4s ease;
}
nav a:hover { color: var(--paper); }
nav a:hover::after { width: 100%; }

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  z-index: 1001;
}
.hamburger span {
  width: 24px;
  height: 1.5px;
  background: var(--paper);
  transition: all 0.3s;
}

/* ===== HERO ===== */
.hero {
  height: 100vh;
  min-height: 700px;
  background: var(--deep-navy);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 20% 80%, rgba(139,69,19,0.08) 0%, transparent 50%),
    radial-gradient(ellipse at 80% 20%, rgba(184,134,11,0.06) 0%, transparent 50%);
}

.wave-pattern {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 200px;
  opacity: 0.06;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1440 320'%3E%3Cpath fill='%23f5f0e8' d='M0,192L48,186.7C96,181,192,171,288,186.7C384,203,480,245,576,245.3C672,245,768,203,864,186.7C960,171,1056,181,1152,186.7C1248,192,1344,192,1392,192L1440,192L1440,320L1392,320C1344,320,1248,320,1152,320C1056,320,960,320,864,320C768,320,672,320,576,320C480,320,384,320,288,320C192,320,96,320,48,320L0,320Z'%3E%3C/path%3E%3C/svg%3E");
  background-size: cover;
}

.seigaiha {
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='100' height='100'%3E%3Ccircle cx='50' cy='0' r='40' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='50' cy='0' r='30' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='50' cy='0' r='20' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='0' cy='50' r='40' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='0' cy='50' r='30' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='0' cy='50' r='20' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='100' cy='50' r='40' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='100' cy='50' r='30' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3Ccircle cx='100' cy='50' r='20' fill='none' stroke='%23f5f0e8' stroke-width='0.5'/%3E%3C/svg%3E");
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
}

.hero-kanji {
  font-family: 'Zen Old Mincho', serif;
  font-size: clamp(3.5rem, 8vw, 7rem);
  color: var(--paper);
  letter-spacing: 2rem;
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeSlideUp 1.2s ease 0.5s forwards;
}

.hero-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(0.7rem, 1.2vw, 0.9rem);
  color: rgba(245,240,232,0.5);
  letter-spacing: 0.8rem;
  margin-bottom: 2rem;
  opacity: 0;
  animation: fadeSlideUp 1.2s ease 0.8s forwards;
}

.hero-tagline {
  font-size: clamp(0.85rem, 1.5vw, 1.1rem);
  font-weight: 300;
  color: rgba(245,240,232,0.75);
  letter-spacing: 0.4rem;
  line-height: 2.2;
  opacity: 0;
  animation: fadeSlideUp 1.2s ease 1.1s forwards;
}

.hero-line {
  width: 1px;
  height: 80px;
  background: linear-gradient(to bottom, var(--gold), transparent);
  margin: 2.5rem auto 0;
  opacity: 0;
  animation: fadeSlideUp 1.2s ease 1.4s forwards;
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.65rem;
  color: rgba(245,240,232,0.4);
  letter-spacing: 0.3rem;
  writing-mode: vertical-rl;
  animation: scrollBounce 2s ease-in-out infinite;
}

@keyframes fadeSlideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes scrollBounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ===== SECTION COMMON ===== */
section {
  padding: 7rem 3rem;
}

.section-label {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.7rem;
  letter-spacing: 0.4rem;
  color: var(--muted);
  margin-bottom: 0.5rem;
}

.section-title {
  font-family: 'Zen Old Mincho', serif;
  font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 400;
  letter-spacing: 0.3rem;
  margin-bottom: 3rem;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 40px;
  height: 1px;
  background: var(--gold);
  margin-top: 1.2rem;
}

/* ===== ABOUT ===== */
.about {
  background: var(--paper-light);
  position: relative;
}

.about-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p {
  font-size: 0.95rem;
  line-height: 2.2;
  color: var(--slate);
  margin-bottom: 1.5rem;
  letter-spacing: 0.05rem;
}

.about-details {
  padding-top: 1rem;
}

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

.about-table tr {
  border-bottom: 1px solid var(--border);
}

.about-table th {
  font-weight: 400;
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.1rem;
  padding: 1.2rem 0;
  text-align: left;
  width: 100px;
  vertical-align: top;
}

.about-table td {
  font-size: 0.9rem;
  padding: 1.2rem 0;
  color: var(--slate);
  line-height: 1.8;
}

/* ===== SERVICES ===== */
.services {
  background: var(--deep-navy);
  color: var(--paper);
  position: relative;
  overflow: hidden;
}

.services::before {
  content: '';
  position: absolute;
  inset: 0;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='60' height='60'%3E%3Cpath d='M30 0L60 30L30 60L0 30Z' fill='none' stroke='%23f5f0e8' stroke-width='0.3'/%3E%3C/svg%3E");
}

.services .section-label { color: rgba(245,240,232,0.4); }
.services .section-title { color: var(--paper); }
.services .section-title::after { background: var(--gold); }

.services-grid {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  position: relative;
  z-index: 1;
}

.service-card {
  background: rgba(245,240,232,0.04);
  border: 1px solid rgba(245,240,232,0.08);
  padding: 2.5rem 1.5rem;
  text-align: center;
  transition: all 0.5s ease;
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gold);
  transform: scaleX(0);
  transition: transform 0.5s ease;
}

.service-card:hover {
  background: rgba(245,240,232,0.08);
  transform: translateY(-4px);
}

.service-card:hover::before {
  transform: scaleX(1);
}

.service-icon {
  font-size: 1.6rem;
  margin-bottom: 1.2rem;
  display: block;
  opacity: 0.7;
}

.service-card h3 {
  font-family: 'Zen Old Mincho', serif;
  font-size: 1rem;
  font-weight: 400;
  letter-spacing: 0.2rem;
  margin-bottom: 0.8rem;
}

.service-card p {
  font-size: 0.75rem;
  color: rgba(245,240,232,0.5);
  line-height: 1.8;
  letter-spacing: 0.05rem;
}

/* ===== WORKS (Before/After) ===== */
.works {
  background: var(--paper);
}

.works-intro {
  max-width: 1100px;
  margin: 0 auto 3rem;
  font-size: 0.9rem;
  line-height: 2;
  color: var(--muted);
  letter-spacing: 0.05rem;
}

.works-list {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  gap: 4rem;
}

.work-item {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

.work-meta {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.8rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.work-meta-left .work-tag {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.7rem;
  letter-spacing: 0.3rem;
  color: var(--gold);
  display: block;
  margin-bottom: 0.4rem;
}

.work-meta-left h3 {
  font-family: 'Zen Old Mincho', serif;
  font-size: 1.2rem;
  font-weight: 400;
  letter-spacing: 0.15rem;
  color: var(--ink);
}

.work-meta-right {
  font-size: 0.8rem;
  color: var(--muted);
  letter-spacing: 0.05rem;
  line-height: 1.8;
  max-width: 420px;
  text-align: right;
}

/* Before/After slider */
.ba-slider {
  position: relative;
  width: 100%;
  aspect-ratio: 4/3;
  overflow: hidden;
  user-select: none;
  cursor: ew-resize;
  background: var(--warm-gray);
  box-shadow: 0 20px 50px rgba(28,40,51,0.15);
}

.ba-slider img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  pointer-events: none;
  -webkit-user-drag: none;
}

.ba-slider .ba-after-wrap {
  position: absolute;
  inset: 0;
  width: 50%;
  overflow: hidden;
  border-right: 2px solid var(--gold);
}

.ba-slider .ba-after-wrap img {
  width: 200%;
  max-width: none;
}

.ba-slider .ba-handle {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 44px;
  margin-left: -22px;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.ba-slider .ba-handle::before {
  content: '';
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 2px;
  background: var(--gold);
  margin-left: -1px;
}

.ba-slider .ba-handle-circle {
  width: 44px;
  height: 44px;
  background: var(--paper);
  border: 2px solid var(--gold);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 12px rgba(0,0,0,0.25);
  font-size: 0.8rem;
  color: var(--deep-navy);
  letter-spacing: 0.05rem;
}

.ba-slider .ba-label {
  position: absolute;
  top: 1rem;
  padding: 0.4rem 1rem;
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.7rem;
  letter-spacing: 0.25rem;
  background: rgba(28,40,51,0.75);
  color: var(--paper);
  backdrop-filter: blur(6px);
  z-index: 2;
}

.ba-slider .ba-label-before { left: 1rem; }
.ba-slider .ba-label-after { right: 1rem; }

/* ===== PHILOSOPHY ===== */
.philosophy {
  background: var(--warm-gray);
  text-align: center;
  padding: 8rem 3rem;
  position: relative;
}

.philosophy-quote {
  font-family: 'Zen Old Mincho', serif;
  font-size: clamp(1.3rem, 2.5vw, 1.8rem);
  font-weight: 400;
  line-height: 2.5;
  letter-spacing: 0.3rem;
  color: var(--slate);
  max-width: 780px;
  margin: 0 auto;
}

.philosophy-line {
  width: 1px;
  height: 60px;
  background: var(--gold);
  margin: 2.5rem auto;
  opacity: 0.5;
}

.philosophy-sub {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.75rem;
  letter-spacing: 0.4rem;
  color: var(--muted);
}

/* ===== CONTACT ===== */
.contact {
  background: var(--paper-light);
  max-width: 100%;
}

.contact-inner {
  max-width: 700px;
  margin: 0 auto;
}

.contact-intro {
  font-size: 0.9rem;
  line-height: 2;
  color: var(--muted);
  margin-bottom: 3rem;
  letter-spacing: 0.05rem;
}

.contact-direct {
  background: white;
  border: 1px solid var(--border);
  padding: 2.5rem 3rem;
  border-top: 2px solid var(--gold);
}

.contact-direct dl {
  display: grid;
  grid-template-columns: 90px 1fr;
  row-gap: 1rem;
  column-gap: 2rem;
  align-items: center;
}

.contact-direct dt {
  font-size: 0.75rem;
  letter-spacing: 0.2rem;
  color: var(--muted);
}

.contact-direct dd {
  font-size: 1.05rem;
  letter-spacing: 0.05rem;
  color: var(--ink);
  font-family: 'Cormorant Garamond', 'Noto Serif JP', serif;
}

.contact-direct dd a {
  color: var(--ink);
  text-decoration: none;
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s;
}

.contact-direct dd a:hover {
  border-color: var(--gold);
}

@media (max-width: 480px) {
  .contact-direct { padding: 2rem 1.5rem; }
  .contact-direct dl { grid-template-columns: 70px 1fr; column-gap: 1rem; }
}

.form-group {
  margin-bottom: 2rem;
}

.form-group label {
  display: block;
  font-size: 0.8rem;
  letter-spacing: 0.15rem;
  color: var(--slate);
  margin-bottom: 0.6rem;
}

.form-group label .required {
  font-size: 0.65rem;
  color: var(--accent);
  margin-left: 0.5rem;
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 1rem;
  border: 1px solid var(--border);
  background: white;
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  color: var(--ink);
  transition: border-color 0.3s;
  outline: none;
  border-radius: 0;
  -webkit-appearance: none;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--gold);
}

.form-group textarea {
  height: 180px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.submit-btn {
  display: block;
  width: 100%;
  padding: 1.2rem;
  background: var(--deep-navy);
  color: var(--paper);
  border: none;
  font-family: 'Noto Serif JP', serif;
  font-size: 0.9rem;
  letter-spacing: 0.3rem;
  cursor: pointer;
  transition: all 0.4s ease;
  position: relative;
  overflow: hidden;
}

.submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: var(--accent);
  transition: left 0.5s ease;
  z-index: 0;
}

.submit-btn:hover::before {
  left: 0;
}

.submit-btn span {
  position: relative;
  z-index: 1;
}

/* ===== FOOTER ===== */
footer {
  background: var(--deep-navy);
  color: var(--paper);
  padding: 4rem 3rem 2rem;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand {
  font-family: 'Zen Old Mincho', serif;
  font-size: 1.3rem;
  letter-spacing: 0.5rem;
  margin-bottom: 1rem;
}

.footer-brand-en {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.65rem;
  letter-spacing: 0.3rem;
  color: rgba(245,240,232,0.4);
  margin-bottom: 1.5rem;
}

.footer-address {
  font-size: 0.8rem;
  line-height: 2;
  color: rgba(245,240,232,0.6);
}

.footer-heading {
  font-size: 0.7rem;
  letter-spacing: 0.2rem;
  color: rgba(245,240,232,0.4);
  margin-bottom: 1.2rem;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.8rem;
}

.footer-links a {
  color: rgba(245,240,232,0.7);
  text-decoration: none;
  font-size: 0.8rem;
  letter-spacing: 0.1rem;
  transition: color 0.3s;
}

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

.footer-bottom {
  border-top: 1px solid rgba(245,240,232,0.08);
  padding-top: 2rem;
  text-align: center;
}

.footer-copyright {
  font-family: 'Cormorant Garamond', serif;
  font-size: 0.7rem;
  letter-spacing: 0.2rem;
  color: rgba(245,240,232,0.3);
}

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 2.5rem;
  right: 2.5rem;
  width: 50px;
  height: 50px;
  background: var(--deep-navy);
  border: 1px solid rgba(245,240,232,0.15);
  color: var(--paper);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 900;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.4s ease;
}
.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
.back-to-top:hover {
  background: var(--accent);
  border-color: var(--accent);
}
.back-to-top svg {
  width: 16px;
  height: 16px;
  stroke: var(--paper);
  stroke-width: 2;
  fill: none;
}

/* ===== SCROLL ANIMATIONS ===== */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: all 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }
.reveal-delay-5 { transition-delay: 0.5s; }
.reveal-delay-6 { transition-delay: 0.6s; }
.reveal-delay-7 { transition-delay: 0.7s; }
.reveal-delay-8 { transition-delay: 0.8s; }

/* ===== RESPONSIVE ===== */
@media (max-width: 1024px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  section { padding: 5rem 1.5rem; }
  header { padding: 1rem 1.5rem; }
  header.scrolled { padding: 0.8rem 1.5rem; }

  .hamburger { display: flex; }

  nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 70%;
    height: 100vh;
    background: var(--deep-navy);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right 0.5s ease;
  }
  nav.open { right: 0; }
  nav ul {
    flex-direction: column;
    gap: 2rem;
    text-align: center;
  }
  nav a { font-size: 0.9rem; }

  .about-inner {
    grid-template-columns: 1fr;
    gap: 3rem;
  }

  .services-grid { grid-template-columns: 1fr 1fr; }
  .form-row { grid-template-columns: 1fr; }

  .footer-inner {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .hero-kanji { letter-spacing: 1rem; }

  .back-to-top {
    bottom: 1.5rem;
    right: 1.5rem;
    width: 44px;
    height: 44px;
  }

  .work-meta-right { text-align: left; max-width: 100%; }
  .works-list { gap: 3rem; }
}

@media (max-width: 480px) {
  .services-grid { grid-template-columns: 1fr; }
  .header-logo-text { display: none; }
}