/* ============================================================
   CSS Custom Properties
   ============================================================ */
:root {
  --color-bg:          #080808;
  --color-bg-2:        #0f0f0f;
  --color-bg-3:        #141414;
  --color-surface:     #1a1a1a;
  --color-surface-2:   #222222;
  --color-border:      #2a2a2a;
  --color-border-2:    #333333;

  --color-text:        #e8e8e8;
  --color-text-muted:  #888888;
  --color-text-faint:  #555555;

  --color-accent:      #c8a96e;
  --color-accent-dark: #a8893e;
  --color-accent-glow: rgba(200, 169, 110, 0.15);

  --color-white:       #ffffff;
  --color-error:       #e05555;
  --color-success:     #55c899;

  --font-body:      'Noto Sans JP', sans-serif;
  --font-display:   'Cormorant Garamond', 'Noto Serif JP', serif;

  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  --container-max: 1100px;
  --container-pad: 1.25rem;
  --header-h: 70px;
}

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

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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.7;
  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;
}

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

/* ============================================================
   Accessibility: Focus
   ============================================================ */
:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 3px;
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

/* ============================================================
   Container
   ============================================================ */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-pad);
}

/* ============================================================
   Sections
   ============================================================ */
.section {
  padding-block: 6rem;
}

.section-header {
  text-align: center;
  margin-bottom: 4rem;
}

.section-label {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.3em;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 700;
  letter-spacing: 0.02em;
  line-height: 1.3;
  color: var(--color-white);
}

.section-desc {
  margin-top: 1rem;
  color: var(--color-text-muted);
  font-size: 0.95rem;
  max-width: 560px;
  margin-inline: auto;
}

/* ============================================================
   Buttons
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.95rem 2.25rem;
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  border: 1px solid transparent;
  transition: background-color var(--transition), color var(--transition),
              border-color var(--transition), transform var(--transition);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-2px);
}

.btn:active {
  transform: translateY(0);
}

.btn-primary {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: #000;
}

.btn-primary:hover {
  background: #d8bd86;
  border-color: #d8bd86;
}

.btn-primary:focus-visible {
  outline-color: var(--color-accent);
}

.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border-2);
}

.btn-ghost:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ============================================================
   Header
   ============================================================ */
.site-header {
  position: fixed;
  top: 0;
  inset-inline: 0;
  height: var(--header-h);
  z-index: 100;
  background: rgba(8,8,8,0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition), border-color var(--transition);
}

.site-header.scrolled {
  background: rgba(8,8,8,0.97);
  border-bottom-color: var(--color-accent-dark);
}

.header-inner {
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo-link {
  display: flex;
  align-items: center;
  transition: opacity var(--transition);
}

.logo-link:hover {
  opacity: 0.8;
}

.logo-img {
  height: 58px;
  width: auto;
  object-fit: contain;
}

/* Nav */
.global-nav {
  display: none;
}

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

.nav-link {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  color: var(--color-text-muted);
  transition: color var(--transition);
  position: relative;
  padding-bottom: 4px;
}

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

.nav-link:hover,
.nav-link:focus-visible {
  color: var(--color-white);
}

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

.nav-link--cta {
  background: var(--color-accent);
  color: #000 !important;
  padding: 0.5rem 1.25rem;
  letter-spacing: 0.08em;
}

.nav-link--cta::after {
  display: none;
}

.nav-link--cta:hover {
  opacity: 0.88;
  transform: translateY(-1px);
}

/* Hamburger */
.nav-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  transition: opacity var(--transition);
}

.nav-toggle:hover {
  opacity: 0.7;
}

.hamburger-bar {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text);
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile nav open */
.global-nav.is-open {
  display: block;
  position: fixed;
  top: var(--header-h);
  inset-inline: 0;
  background: rgba(8,8,8,0.98);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-border);
  padding: 1.5rem var(--container-pad) 2rem;
  animation: slideDown 0.25s ease;
}

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

.global-nav.is-open .nav-list {
  flex-direction: column;
  align-items: flex-start;
  gap: 0;
}

.global-nav.is-open .nav-link {
  display: block;
  padding-block: 0.9rem;
  font-size: 1rem;
  width: 100%;
  border-bottom: 1px solid var(--color-border);
}

.global-nav.is-open .nav-link--cta {
  margin-top: 1rem;
  display: inline-flex;
  width: auto;
  border-bottom: none;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  position: relative;
  min-height: 100svh;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding-top: var(--header-h);
  overflow: hidden;
  background: var(--color-bg);
}

.hero-bg {
  position: absolute;
  inset: 0;
  background: var(--color-bg-2);
  pointer-events: none;
}

/* ---- Hero Video ---- */
.hero-video {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  opacity: 0;
  transition: opacity 1s ease;
}

.hero-video.is-playing {
  opacity: 1;
}

.hero-video-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.55);
  pointer-events: none;
}

/* ---- Video Placeholder ---- */
.hero-video-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
  pointer-events: none;
}

.hvp-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 2rem 2.5rem;
  border: 1.5px dashed rgba(200,169,110,0.45);
  background: rgba(0,0,0,0.35);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  text-align: center;
  max-width: 340px;
  animation: hvpPulse 3s ease-in-out infinite;
}

@keyframes hvpPulse {
  0%, 100% { border-color: rgba(200,169,110,0.35); }
  50%       { border-color: rgba(200,169,110,0.7); }
}

.hvp-icon {
  color: var(--color-accent);
  opacity: 0.85;
}

.hvp-title {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--color-white);
}


.hero-video-placeholder.is-hidden {
  display: none;
}

/* ---- (keep existing) ---- */
.hero-particle {
  position: absolute;
  inset: 0;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  padding-block: 4rem;
}

.hero-logo-wrap {
  margin-bottom: 2rem;
}

.hero-brand-name {
  font-family: 'Cormorant Garamond', serif;
  font-size: clamp(2rem, 6vw, 4.2rem);
  font-weight: 300;
  letter-spacing: 0.22em;
  color: var(--color-white);
  animation: fadeInDown 1s ease both;
  line-height: 1.2;
}

.hero-tagline {
  font-family: var(--font-display);
  font-size: 0.68rem;
  letter-spacing: 0.4em;
  color: var(--color-accent);
  margin-bottom: 1.25rem;
  animation: fadeInUp 1s 0.2s ease both;
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 6vw, 3.8rem);
  font-weight: 700;
  line-height: 1.25;
  letter-spacing: 0.01em;
  color: var(--color-white);
  margin-bottom: 1.25rem;
  animation: fadeInUp 1s 0.35s ease both;
}

.hero-sub {
  font-size: clamp(0.85rem, 2vw, 1rem);
  color: var(--color-text-muted);
  line-height: 1.9;
  margin-bottom: 2.5rem;
  animation: fadeInUp 1s 0.5s ease both;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeInUp 1s 0.65s ease both;
}

@keyframes fadeInDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

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

/* ============================================================
   About
   ============================================================ */
.about {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.about-grid {
  display: grid;
  gap: 3rem;
}

.about-lead {
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.about-text p {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 2;
  margin-bottom: 1rem;
}

.about-text p:last-child {
  margin-bottom: 0;
}

.about-features {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 1.25rem;
}

.feature-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  padding: 1.75rem;
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
}

.feature-card:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
  transform: translateY(-4px);
}

.feature-icon {
  color: var(--color-accent);
  margin-bottom: 1rem;
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.feature-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   Service
   ============================================================ */
.service {
  background: var(--color-bg);
}

.service-block {
  max-width: 860px;
  margin-inline: auto;
  margin-bottom: 3rem;
}

.service-divider {
  max-width: 860px;
  margin-inline: auto;
  height: 1px;
  background: var(--color-border-2);
  margin-block: 3rem;
}

.service-block-header {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  margin-bottom: 1.25rem;
}

.service-number {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 700;
  color: var(--color-border-2);
  line-height: 1;
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.service-block-title {
  font-size: clamp(1.3rem, 3vw, 1.8rem);
  font-weight: 700;
  color: var(--color-white);
}

.service-block-sub {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--color-accent);
  margin-top: 0.2rem;
}

.service-block-desc {
  color: var(--color-text-muted);
  font-size: 0.95rem;
  line-height: 2;
  margin-bottom: 2rem;
}

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

.service-item {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  transition: border-color var(--transition), background-color var(--transition), transform var(--transition);
  overflow: hidden;
}

.service-item:hover {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
  transform: translateY(-3px);
}

.service-item-inner {
  padding: 1.5rem;
  position: relative;
}

.service-item-inner::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 3px;
  height: 100%;
  background: var(--color-accent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-item:hover .service-item-inner::before {
  opacity: 1;
}

.service-item-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.service-item-desc {
  font-size: 0.83rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ============================================================
   Flow
   ============================================================ */
.flow {
  background: var(--color-bg-2);
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
}

.flow-list {
  display: grid;
  gap: 0;
  max-width: 700px;
  margin-inline: auto;
  counter-reset: flow-counter;
}

.flow-item {
  display: flex;
  gap: 2rem;
  align-items: flex-start;
  position: relative;
  padding-bottom: 2.5rem;
}

.flow-item:last-child {
  padding-bottom: 0;
}

.flow-item:not(:last-child)::after {
  content: '';
  position: absolute;
  left: calc(28px);
  top: 56px;
  width: 1px;
  height: calc(100% - 56px);
  background: var(--color-border-2);
}

.flow-step {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  border: 1px solid var(--color-border-2);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--color-accent);
  background: var(--color-surface);
  transition: border-color var(--transition), background-color var(--transition);
}

.flow-item:hover .flow-step {
  border-color: var(--color-accent);
  background: var(--color-surface-2);
}

.flow-content {
  padding-top: 0.75rem;
}

.flow-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-white);
  margin-bottom: 0.5rem;
}

.flow-desc {
  font-size: 0.88rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ============================================================
   Reservation Form
   ============================================================ */
.reserve {
  background: var(--color-bg);
}

.reserve-form {
  max-width: 600px;
  margin-inline: auto;
  background: transparent;
  border: none;
  padding: 0;
}

.form-status {
  display: none;
  padding: 1rem 1.25rem;
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

.form-status.success {
  display: block;
  background: rgba(85,200,153,0.1);
  border: 1px solid rgba(85,200,153,0.3);
  color: var(--color-success);
}

.form-status.error {
  display: block;
  background: rgba(224,85,85,0.1);
  border: 1px solid rgba(224,85,85,0.3);
  color: var(--color-error);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0;
  margin-bottom: 0;
  position: relative;
  padding-bottom: 2rem;
  border-bottom: 1px solid var(--color-border);
}

.form-group:last-of-type {
  border-bottom: none;
  padding-bottom: 1.5rem;
}

.form-label {
  font-family: var(--font-display);
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 0.75rem;
}

.required {
  color: var(--color-accent);
  margin-left: 0.1rem;
  opacity: 0.7;
}

.form-input {
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border-2);
  padding: 0.6rem 0;
  color: var(--color-text);
  font-family: var(--font-body);
  font-size: 1rem;
  width: 100%;
  transition: border-color var(--transition);
  appearance: none;
  -webkit-appearance: none;
  position: relative;
  z-index: 1;
}

.form-input::placeholder {
  color: var(--color-text-faint);
  font-size: 0.88rem;
}

.form-input:hover {
  border-color: var(--color-text-muted);
}

.form-input:focus {
  outline: none;
  border-color: transparent;
}

/* フォーカス時のゴールドアンダーライン */
.form-group::after {
  content: '';
  position: absolute;
  bottom: 2rem;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.4s cubic-bezier(0.4, 0, 0.2, 1);
  pointer-events: none;
}

.form-group:last-of-type::after {
  bottom: 1.5rem;
}

.form-group:focus-within::after {
  width: 100%;
}

.form-input.is-invalid {
  border-color: var(--color-error);
}

.form-group:has(.is-invalid)::after {
  background: var(--color-error);
  width: 100%;
}

.form-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%23888' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.25rem center;
  padding-right: 2rem;
  cursor: pointer;
}

.form-select option {
  background: var(--color-surface);
  color: var(--color-text);
}

.form-textarea {
  resize: none;
  min-height: 100px;
  line-height: 1.7;
}

.form-error {
  font-size: 0.75rem;
  color: var(--color-error);
  min-height: 1em;
  margin-top: 0.4rem;
  letter-spacing: 0.02em;
}

.form-group--checkbox {
  border-bottom: none;
  padding-bottom: 1rem;
  padding-top: 0.5rem;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  cursor: pointer;
}

.checkbox-input {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}

.checkbox-custom {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  border: 1px solid var(--color-border-2);
  background: var(--color-bg-3);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: border-color var(--transition), background var(--transition);
}

.checkbox-input:checked + .checkbox-custom {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

.checkbox-input:checked + .checkbox-custom::after {
  content: '';
  display: block;
  width: 5px;
  height: 9px;
  border: 2px solid #000;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.checkbox-input:focus-visible + .checkbox-custom {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

.checkbox-text {
  font-size: 0.88rem;
  color: var(--color-text-muted);
}

.form-link {
  color: var(--color-accent);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity var(--transition);
}

.form-link:hover {
  opacity: 0.8;
}

.form-submit {
  text-align: center;
}

.btn-submit {
  min-width: 220px;
  padding: 1rem 2.5rem;
  font-size: 0.95rem;
}

.btn-submit:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ============================================================
   Footer
   ============================================================ */
.site-footer {
  background: var(--color-bg);
  border-top: 1px solid var(--color-border);
  padding-block: 3rem;
}

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
  text-align: center;
}

.footer-logo img {
  margin-inline: auto;
  opacity: 0.7;
  filter: brightness(0.85);
  transition: opacity var(--transition);
}

.footer-logo img:hover {
  opacity: 1;
}

.footer-nav-list {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
  justify-content: center;
}

.footer-nav-link {
  font-family: var(--font-display);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.footer-nav-link:hover {
  color: var(--color-accent);
}

.footer-copy {
  font-size: 0.78rem;
  color: var(--color-text-muted);
}

/* ============================================================
   Scroll Reveal
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity var(--transition-slow), transform var(--transition-slow);
}

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

/* ============================================================
   Responsive — Tablet & Desktop
   ============================================================ */
@media (min-width: 768px) {
  :root {
    --container-pad: 2rem;
  }

  .about-grid {
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
  }


  .nav-toggle {
    display: none;
  }

  .global-nav {
    display: flex;
  }
}

@media (min-width: 1024px) {
  :root {
    --container-pad: 2.5rem;
  }

  .section {
    padding-block: 8rem;
  }

  .hero-brand-name {
    font-size: clamp(2.8rem, 5vw, 4.2rem);
  }
}