/* ===========================
   WatchSelect LP - Style
   =========================== */

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

:root {
  --color-bg: #0c0c0c;
  --color-bg-light: #161616;
  --color-bg-card: #1a1a1a;
  --color-text: #e8e6e1;
  --color-text-muted: #9e9a94;
  --color-accent: #c5a55a;
  --color-accent-light: #d4b96f;
  --color-navy: #1b2d5b;
  --color-border: #2a2a2a;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-serif: 'Cormorant Garamond', serif;
  --container: 1100px;
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-weight: 400;
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.8;
  font-size: 15px;
  -webkit-font-smoothing: antialiased;
}

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

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Section common --- */
.section-label {
  font-family: var(--font-serif);
  font-size: 0.85rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: 16px;
}

.section-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  line-height: 1.5;
  margin-bottom: 48px;
}

/* --- Button --- */
.btn-primary {
  display: inline-block;
  padding: 14px 40px;
  background: var(--color-accent);
  color: var(--color-bg);
  font-size: 0.9rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  border: none;
  cursor: pointer;
  transition: background 0.3s var(--ease), transform 0.3s var(--ease);
}

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

.btn-large {
  padding: 18px 56px;
  font-size: 1rem;
}

/* ========================
   Header
   ======================== */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  background: rgba(12, 12, 12, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
  transition: transform 0.3s var(--ease);
}

.header.is-hidden {
  transform: translateY(-100%);
}

.header-inner {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
  height: 72px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

.logo-img {
  height: 36px;
  width: auto;
}

.nav {
  display: flex;
  gap: 32px;
}

.nav a {
  font-size: 0.88rem;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  transition: color 0.3s;
  position: relative;
}

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: width 0.3s var(--ease);
}

.nav a:hover {
  color: var(--color-text);
}

.nav a:hover::after {
  width: 100%;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 1.5px;
  background: var(--color-text);
  transition: transform 0.3s, opacity 0.3s;
}

/* ========================
   Hero
   ======================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  overflow: hidden;
  background: url('/asset/img/free/1.png') center center / cover no-repeat;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background:
    linear-gradient(180deg, rgba(12, 12, 12, 0.7) 0%, rgba(12, 12, 12, 0.55) 40%, rgba(12, 12, 12, 0.9) 100%);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 24px;
}

.hero-sub {
  font-family: var(--font-serif);
  font-size: clamp(0.85rem, 1.5vw, 1rem);
  letter-spacing: 0.25em;
  color: var(--color-accent);
  margin-bottom: 24px;
}

.hero-title {
  font-family: var(--font-sans);
  font-weight: 700;
  font-size: clamp(2rem, 5vw, 3.4rem);
  line-height: 1.5;
  margin-bottom: 24px;
}

.hero-title em {
  font-style: normal;
  color: var(--color-accent);
}

.hero-desc {
  font-size: clamp(0.9rem, 1.5vw, 1.05rem);
  color: var(--color-text-muted);
  line-height: 2;
  margin-bottom: 48px;
}

.hero-scroll {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  z-index: 1;
}

.hero-scroll span {
  font-family: var(--font-serif);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--color-text-muted);
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--color-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.3; transform: scaleY(0.6); }
  50% { opacity: 1; transform: scaleY(1); }
}

/* ========================
   Concept
   ======================== */
.concept {
  padding: 120px 0;
}

.concept-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.concept-text p {
  margin-bottom: 20px;
  color: var(--color-text-muted);
  font-size: 1rem;
  line-height: 2;
}

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

.concept-image {
  display: flex;
  justify-content: center;
}

.concept-image-placeholder {
  width: 100%;
  max-width: 400px;
  aspect-ratio: 1;
  overflow: hidden;
}

.concept-image-placeholder img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.9);
  transition: transform 0.6s var(--ease);
}

.concept-image-placeholder:hover img {
  transform: scale(1.03);
}

/* ========================
   Features
   ======================== */
.features {
  padding: 120px 0;
  background: var(--color-bg-light);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.feature-card {
  padding: 48px 36px;
  border: 1px solid var(--color-border);
  transition: border-color 0.4s var(--ease), transform 0.4s var(--ease);
}

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

.feature-number {
  font-family: var(--font-serif);
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--color-accent);
  opacity: 0.4;
  margin-bottom: 24px;
}

.feature-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.feature-card p {
  font-size: 0.92rem;
  color: var(--color-text-muted);
  line-height: 1.9;
}

/* Brand grid */
.brand-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

.brand-chip {
  display: inline-flex;
  align-items: baseline;
  gap: 6px;
  padding: 10px 22px;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-size: 0.95rem;
  text-decoration: none;
  transition: all 0.3s var(--ease);
}

.brand-chip:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
  background: rgba(197, 165, 90, 0.06);
}

.brand-chip-jp {
  font-size: 0.78rem;
  opacity: 0.5;
}

.link-accent {
  font-size: 0.88rem;
  color: var(--color-accent);
  text-decoration: none;
  transition: opacity 0.3s;
}

.link-accent:hover {
  opacity: 0.7;
}

/* ========================
   Collection
   ======================== */
.collection {
  padding: 120px 0;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.collection-card {
  border: 1px solid var(--color-border);
  overflow: hidden;
  transition: border-color 0.4s var(--ease);
}

.collection-card:hover {
  border-color: var(--color-accent);
}

.collection-image {
  aspect-ratio: 4 / 3;
  background: var(--color-bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.collection-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease);
}

.collection-card:hover .collection-image img {
  transform: scale(1.05);
}

.collection-placeholder {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  letter-spacing: 0.15em;
  color: var(--color-text-muted);
  opacity: 0.3;
}

.collection-info {
  padding: 28px 24px;
}

.collection-category {
  font-size: 0.72rem;
  letter-spacing: 0.15em;
  color: var(--color-accent);
  margin-bottom: 8px;
  display: block;
}

.collection-info h3 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.collection-info p {
  font-size: 0.82rem;
  color: var(--color-text-muted);
  line-height: 1.8;
}

/* ========================
   CTA
   ======================== */
.cta {
  padding: 120px 0;
  text-align: center;
  background:
    radial-gradient(ellipse at center, rgba(200, 169, 110, 0.08) 0%, transparent 70%),
    var(--color-bg-light);
}

.cta-title {
  font-size: clamp(1.5rem, 3.5vw, 2.2rem);
  font-weight: 700;
  line-height: 1.6;
  margin-bottom: 20px;
}

.cta-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 40px;
}

/* ========================
   Contact
   ======================== */
.contact {
  padding: 120px 0;
}

.contact-desc {
  color: var(--color-text-muted);
  font-size: 0.92rem;
  margin-top: -32px;
  margin-bottom: 48px;
}

.contact-form {
  max-width: 700px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 0.82rem;
  letter-spacing: 0.05em;
  color: var(--color-text-muted);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 12px 16px;
  background: var(--color-bg-light);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-size: 0.92rem;
  transition: border-color 0.3s;
  outline: none;
}

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  outline: 2px solid var(--color-accent);
  outline-offset: 1px;
}

.form-group textarea {
  resize: vertical;
}

/* ========================
   Footer
   ======================== */
.footer {
  padding: 48px 0 32px;
  border-top: 1px solid var(--color-border);
}

.footer-inner {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  margin-bottom: 24px;
}

.footer-brand {
  display: flex;
  align-items: baseline;
  gap: 10px;
}

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

.footer-copy {
  font-size: 0.72rem;
  color: var(--color-text-muted);
  opacity: 0.6;
}

/* ========================
   Scroll animations
   ======================== */
.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s var(--ease), transform 0.8s var(--ease);
}

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

/* ========================
   Responsive
   ======================== */
@media (max-width: 768px) {
  .nav {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    width: 100%;
    background: rgba(12, 12, 12, 0.95);
    backdrop-filter: blur(12px);
    flex-direction: column;
    padding: 32px 24px;
    gap: 24px;
    border-bottom: 1px solid var(--color-border);
  }

  .nav.is-open {
    display: flex;
  }

  .nav-toggle {
    display: flex;
  }

  .concept-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .concept-image {
    order: -1;
  }

  .concept-image-placeholder {
    max-width: 280px;
  }

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

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

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

  .footer-inner {
    flex-direction: column;
    gap: 12px;
  }

  .hero {
    min-height: 80vh;
  }
}

/* ========================
   Accessibility
   ======================== */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  .fade-in {
    opacity: 1;
    transform: none;
  }
  .header {
    transition: none;
  }
}

/* Focus visible for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible,
textarea:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

/* ========================
   Tablet (768px - 1024px)
   ======================== */
@media (min-width: 769px) and (max-width: 1024px) {
  .features-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .collection-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}