/* ========================================
   GooCyoku - Style
   Light Theme / Mincho / No Gradient / No Emoji
   ======================================== */

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

:root {
  --color-bg: #fafafa;
  --color-bg-alt: #f2f2f2;
  --color-bg-card: #ffffff;
  --color-border: #e0e0e0;
  --color-text: #1a1a1a;
  --color-text-muted: #666666;
  --color-text-dim: #999999;
  --color-accent: #c8102e;
  --color-accent-hover: #e01235;
  --color-white: #0a0a0a;
  --font-serif: 'Noto Serif JP', 'Yu Mincho', 'YuMincho', 'Hiragino Mincho Pro', serif;
  --transition: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --transition-fast: 0.2s ease;
}

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

body {
  font-family: var(--font-serif);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.8;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

body.no-scroll {
  overflow: hidden;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition-fast);
}

ul {
  list-style: none;
}

img {
  max-width: 100%;
  height: auto;
}

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}

/* ========================================
   LOADING SCREEN
   ======================================== */
.loading {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background-color: var(--color-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loading.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-inner {
  text-align: center;
}

.loading-logo {
  font-size: 2.5rem;
  font-weight: 900;
  letter-spacing: 0.05em;
  margin-bottom: 40px;
  animation: loadingPulse 1.5s ease-in-out infinite;
}

@keyframes loadingPulse {
  0%, 100% { opacity: 0.4; }
  50% { opacity: 1; }
}

.loading-bar {
  width: 200px;
  height: 1px;
  background-color: var(--color-border);
  margin: 0 auto 24px;
  overflow: hidden;
}

.loading-bar-fill {
  width: 0%;
  height: 100%;
  background-color: var(--color-accent);
  transition: width 0.3s ease;
}

.loading-text {
  font-size: 0.75rem;
  color: var(--color-text-dim);
  letter-spacing: 0.3em;
  font-weight: 300;
}

/* --- Fade-in Animation --- */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Stagger delays */
.fade-in[data-delay="1"] { transition-delay: 0.15s; }
.fade-in[data-delay="2"] { transition-delay: 0.3s; }
.fade-in[data-delay="3"] { transition-delay: 0.45s; }
.fade-in[data-delay="4"] { transition-delay: 0.6s; }

/* ========================================
   HEADER
   ======================================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  transition: background-color var(--transition), box-shadow var(--transition);
}

.header--scrolled {
  background-color: rgba(250, 250, 250, 0.95);
  box-shadow: 0 1px 0 var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 20px 40px;
  transition: padding var(--transition);
}

.header--scrolled .header-inner {
  padding: 14px 40px;
}

/* --- Logo --- */
.logo {
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  display: flex;
  align-items: baseline;
}

.logo-mark {
  color: var(--color-white);
}

.logo-mark-accent {
  color: var(--color-accent);
}

/* --- Nav --- */
.nav-list {
  display: flex;
  gap: 40px;
}

.nav-link {
  font-size: 0.85rem;
  font-weight: 400;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  position: relative;
  padding-bottom: 4px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background-color: var(--color-accent);
  transition: width var(--transition);
}

.nav-link:hover,
.nav-link.is-active {
  color: var(--color-white);
}

.nav-link:hover::after,
.nav-link.is-active::after {
  width: 100%;
}

/* --- Hamburger --- */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 40px;
  height: 40px;
  background: none;
  border: none;
  cursor: pointer;
  gap: 6px;
  z-index: 1001;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 1px;
  background-color: var(--color-white);
  transition: transform var(--transition), opacity var(--transition);
}

.hamburger.is-active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger.is-active span:nth-child(2) {
  opacity: 0;
}

.hamburger.is-active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

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

.hero-bg-pattern {
  position: absolute;
  inset: 0;
  opacity: 0.04;
  background-image:
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent 60px,
      var(--color-white) 60px,
      var(--color-white) 61px
    ),
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent 60px,
      var(--color-white) 60px,
      var(--color-white) 61px
    );
}

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

.hero-sub {
  font-size: 0.8rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-text-muted);
  margin-bottom: 30px;
}

.hero-title {
  margin-bottom: 20px;
}

.hero-title-jp {
  display: block;
  font-size: clamp(1.4rem, 3vw, 2rem);
  font-weight: 400;
  letter-spacing: 0.2em;
  color: var(--color-text);
}

.hero-logo-large {
  font-size: clamp(3rem, 8vw, 6rem);
  font-weight: 900;
  letter-spacing: 0.05em;
  line-height: 1.1;
  margin-bottom: 30px;
}

.hero-divider {
  width: 60px;
  height: 1px;
  background-color: var(--color-accent);
  margin: 0 auto 30px;
}

.hero-desc {
  font-size: 0.9rem;
  letter-spacing: 0.3em;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* --- Scroll indicator --- */
.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.hero-scroll-text {
  font-size: 0.65rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-text-dim);
  writing-mode: vertical-rl;
}

.hero-scroll-line {
  width: 1px;
  height: 50px;
  background-color: var(--color-accent);
  animation: scrollLine 2s ease-in-out infinite;
}

@keyframes scrollLine {
  0% {
    transform: scaleY(0);
    transform-origin: top;
  }
  50% {
    transform: scaleY(1);
    transform-origin: top;
  }
  51% {
    transform-origin: bottom;
  }
  100% {
    transform: scaleY(0);
    transform-origin: bottom;
  }
}

/* ========================================
   SECTIONS - Common
   ======================================== */
.section {
  padding: 140px 0;
}

.section-header {
  margin-bottom: 80px;
}

.section-label {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.section-title {
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-white);
}

/* ========================================
   PHILOSOPHY
   ======================================== */
.philosophy {
  background-color: var(--color-bg);
}

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

.philosophy-card {
  background-color: var(--color-bg-card);
  padding: 50px 40px;
  position: relative;
  transition: background-color var(--transition);
}

.philosophy-card:hover {
  background-color: #f0f0f0;
}

.philosophy-card-number {
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 20px;
  font-weight: 500;
}

.philosophy-card-title {
  font-size: 1.6rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-white);
  margin-bottom: 20px;
}

.philosophy-card-line {
  width: 30px;
  height: 1px;
  background-color: var(--color-accent);
  margin-bottom: 20px;
}

.philosophy-card-text {
  font-size: 0.9rem;
  line-height: 2;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* ========================================
   STRENGTHS
   ======================================== */
.strengths {
  background-color: var(--color-bg-alt);
}

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

.strength-card {
  background-color: var(--color-bg-card);
  padding: 50px 40px;
  position: relative;
  transition: background-color var(--transition), transform var(--transition);
  overflow: hidden;
}

.strength-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--color-accent);
  transition: width 0.6s ease;
}

.strength-card:hover::before {
  width: 100%;
}

.strength-card:hover {
  background-color: #f0f0f0;
}

.strength-icon {
  color: var(--color-accent);
  margin-bottom: 24px;
}

.strength-title {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-white);
  margin-bottom: 16px;
}

.strength-text {
  font-size: 0.88rem;
  line-height: 2;
  color: var(--color-text-muted);
  font-weight: 300;
}

/* ========================================
   SERVICES
   ======================================== */
.services {
  background-color: var(--color-bg-alt);
}

.service-block {
  border: 1px solid var(--color-border);
  margin-bottom: 40px;
  transition: border-color var(--transition);
}

.service-block:hover {
  border-color: var(--color-accent);
}

.service-block:last-child {
  margin-bottom: 0;
}

.service-block-header {
  display: flex;
  align-items: center;
  gap: 30px;
  padding: 40px;
  border-bottom: 1px solid var(--color-border);
}

.service-number {
  font-size: 2.5rem;
  font-weight: 900;
  color: var(--color-accent);
  line-height: 1;
  min-width: 60px;
}

.service-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-white);
  margin-bottom: 4px;
}

.service-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  letter-spacing: 0.1em;
  font-weight: 300;
}

.service-block-body {
  padding: 40px;
}

.service-items {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 40px;
}

.service-item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-white);
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  padding-left: 16px;
  border-left: 2px solid var(--color-accent);
}

.service-item-list li {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  padding: 6px 0;
  padding-left: 20px;
  position: relative;
  font-weight: 300;
}

.service-item-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 50%;
  width: 6px;
  height: 1px;
  background-color: var(--color-text-dim);
}

.service-team {
  margin-top: 30px;
  padding-top: 20px;
  border-top: 1px solid var(--color-border);
  font-size: 0.8rem;
  color: var(--color-text-dim);
  display: flex;
  align-items: center;
  gap: 16px;
}

.service-team-label {
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 2px 12px;
  font-size: 0.7rem;
  letter-spacing: 0.1em;
}

/* ========================================
   MEMBERS
   ======================================== */
.members {
  background-color: var(--color-bg);
}

.members-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 40px;
}

.member-card {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  background-color: var(--color-bg-card);
  padding: 60px 40px;
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), transform var(--transition);
}

.member-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-4px);
}

.member-avatar {
  margin-bottom: 30px;
}

.member-avatar-placeholder {
  width: 100px;
  height: 100px;
  border-radius: 50%;
  background-color: var(--color-bg);
  border: 2px solid var(--color-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 2rem;
  font-weight: 700;
  color: var(--color-accent);
  letter-spacing: 0;
}

.member-role {
  display: block;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 12px;
  font-weight: 500;
}

.member-name {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--color-white);
  margin-bottom: 20px;
}

.member-divider {
  width: 30px;
  height: 1px;
  background-color: var(--color-accent);
  margin: 0 auto 20px;
}

.member-desc {
  font-size: 0.88rem;
  line-height: 2;
  color: var(--color-text-muted);
  font-weight: 300;
  margin-bottom: 24px;
}

.member-tags {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
}

.member-tag {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  color: var(--color-text-dim);
  border: 1px solid var(--color-border);
  padding: 4px 14px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.member-card:hover .member-tag {
  color: var(--color-text-muted);
  border-color: var(--color-text-dim);
}

/* ========================================
   COMPANY
   ======================================== */
.company {
  background-color: var(--color-bg);
}

.company-table {
  max-width: 800px;
}

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

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

.company-table th,
.company-table td {
  padding: 24px 0;
  text-align: left;
  vertical-align: top;
  font-size: 0.9rem;
}

.company-table th {
  width: 160px;
  color: var(--color-text-muted);
  font-weight: 400;
  letter-spacing: 0.1em;
}

.company-table td {
  color: var(--color-text);
  font-weight: 300;
}

.company-link {
  color: var(--color-text);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 2px;
}

.company-link:hover {
  color: var(--color-accent);
  border-bottom-color: var(--color-accent);
}

/* ========================================
   CONTACT
   ======================================== */
.contact {
  background-color: var(--color-bg-alt);
}

.contact-body {
  text-align: center;
  max-width: 600px;
  margin: 0 auto;
}

.contact-text {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-bottom: 50px;
  font-weight: 300;
  letter-spacing: 0.08em;
}

.contact-btn {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  background-color: var(--color-accent);
  color: #ffffff;
  padding: 20px 48px;
  font-size: 1rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  font-family: var(--font-serif);
  transition: background-color var(--transition-fast), transform var(--transition-fast);
  cursor: pointer;
  border: none;
}

.contact-btn:hover {
  background-color: var(--color-accent-hover);
  transform: translateY(-2px);
}

.contact-btn-icon {
  display: flex;
  align-items: center;
}

/* ========================================
   FOOTER
   ======================================== */
.footer {
  background-color: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding: 60px 0 40px;
}

.footer-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 40px;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 30px;
}

.footer-logo {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.05em;
}

.footer-catchphrase {
  font-size: 0.8rem;
  color: var(--color-text-dim);
  letter-spacing: 0.15em;
  font-weight: 300;
}

.footer-divider {
  width: 100%;
  height: 1px;
  background-color: var(--color-border);
  margin-bottom: 30px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-gratitude {
  font-size: 1.2rem;
  font-weight: 700;
  letter-spacing: 0.3em;
  color: var(--color-accent);
}

.footer-copy {
  font-size: 0.7rem;
  color: var(--color-text-dim);
  letter-spacing: 0.1em;
  font-weight: 300;
}

/* ========================================
   BACK TO TOP
   ======================================== */
.back-to-top {
  position: fixed;
  bottom: 40px;
  right: 40px;
  width: 48px;
  height: 48px;
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  z-index: 900;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background-color: var(--color-accent);
  border-color: var(--color-accent);
  color: #ffffff;
}

/* ========================================
   RESPONSIVE
   ======================================== */

/* --- Tablet --- */
@media (max-width: 900px) {
  .container {
    padding: 0 24px;
  }

  .header-inner {
    padding: 16px 24px;
  }

  .hamburger {
    display: flex;
  }

  .nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 100%;
    height: 100vh;
    background-color: var(--color-bg);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: right var(--transition);
    z-index: 1000;
  }

  .nav.is-open {
    right: 0;
  }

  .nav-list {
    flex-direction: column;
    align-items: center;
    gap: 36px;
  }

  .nav-link {
    font-size: 1.1rem;
    letter-spacing: 0.2em;
  }

  .philosophy-grid {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .strengths-grid {
    grid-template-columns: 1fr;
    gap: 2px;
  }

  .members-grid {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .section {
    padding: 100px 0;
  }

  .service-block-header {
    padding: 30px;
    gap: 20px;
  }

  .service-block-body {
    padding: 30px;
  }

  .service-items {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .footer-top,
  .footer-bottom {
    flex-direction: column;
    gap: 16px;
    text-align: center;
  }
}

/* --- Mobile --- */
@media (max-width: 600px) {
  html {
    font-size: 14px;
  }

  .container {
    padding: 0 20px;
  }

  .header-inner {
    padding: 14px 20px;
  }

  .hero {
    min-height: 600px;
  }

  .hero-sub {
    font-size: 0.65rem;
    letter-spacing: 0.25em;
  }

  .hero-logo-large {
    font-size: clamp(2.2rem, 12vw, 4rem);
  }

  .section {
    padding: 80px 0;
  }

  .section-header {
    margin-bottom: 50px;
  }

  .philosophy-card {
    padding: 36px 28px;
  }

  .service-block-header {
    flex-direction: column;
    align-items: flex-start;
    padding: 24px;
    gap: 12px;
  }

  .service-block-body {
    padding: 24px;
  }

  .service-number {
    font-size: 2rem;
  }

  .company-table th {
    width: 100px;
    font-size: 0.8rem;
  }

  .company-table td {
    font-size: 0.85rem;
  }

  .strengths-grid {
    grid-template-columns: 1fr;
  }

  .strength-card {
    padding: 36px 28px;
  }

  .members-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .member-card {
    padding: 40px 28px;
  }

  .contact-btn {
    padding: 16px 36px;
    font-size: 0.9rem;
  }

  .footer-inner {
    padding: 0 20px;
  }

  .back-to-top {
    bottom: 24px;
    right: 24px;
    width: 40px;
    height: 40px;
  }
}