/* ========================================
   satchelroyale.css
   Modern leather-brand landing page style
   ======================================== */

/* ---------- CSS Variables ---------- */
:root {
  --color-bg: #f8f6f3;
  --color-bg-dark: #1a1a1a;
  --color-text: #2c2c2c;
  --color-text-light: #5a5a5a;
  --color-accent: #8b6914;
  --color-accent-light: #c9a227;
  --color-leather: #6b4423;
  --color-white: #fff;
  --color-border: #d9d5ce;
  --font-sans: "Hiragino Kaku Gothic ProN", "Hiragino Sans", "Meiryo", "Yu Gothic", sans-serif;
  --font-serif: "Hiragino Mincho ProN", "Yu Mincho", "MS Mincho", serif;
  --max-width: 1200px;
  --section-padding: 80px 20px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.8;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
}

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

a:hover {
  color: var(--color-accent);
}

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

ul, ol {
  list-style: none;
}

/* ---------- Utility ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section-title {
  font-family: var(--font-serif);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 400;
  text-align: center;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
  color: var(--color-text);
}

.section-subtitle {
  font-size: 0.85rem;
  color: var(--color-text-light);
  text-align: center;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  margin-bottom: 48px;
}

/* ---------- Header ---------- */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(248, 246, 243, 0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 20px;
}

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

.site-nav ul {
  display: flex;
  gap: 32px;
}

.site-nav a {
  font-size: 0.9rem;
  letter-spacing: 0.05em;
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  height: 100vh;
  min-height: 600px;
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-white);
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  filter: brightness(0.55);
}

.hero-content {
  position: relative;
  z-index: 1;
  padding: 0 20px;
}

.hero-logo {
  width: 180px;
  margin: 0 auto 24px;
}

.hero h1 {
  font-family: var(--font-serif);
  font-size: clamp(1.8rem, 5vw, 3rem);
  font-weight: 400;
  letter-spacing: 0.1em;
  margin-bottom: 16px;
}

.hero p {
  font-size: 1rem;
  letter-spacing: 0.08em;
  opacity: 0.9;
}

.scroll-hint {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  animation: bounce 2s infinite;
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50% { transform: translateX(-50%) translateY(8px); }
}

/* ---------- About ---------- */
.about {
  padding: var(--section-padding);
  background: var(--color-white);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}

.about-image img {
  border-radius: 4px;
}

.about-text h2 {
  font-family: var(--font-serif);
  font-size: 1.6rem;
  margin-bottom: 24px;
  line-height: 1.6;
}

.about-text p {
  color: var(--color-text-light);
  margin-bottom: 16px;
}

/* ---------- Materials ---------- */
.materials {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.materials-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.material-card {
  background: var(--color-white);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 2px 12px rgba(0,0,0,0.06);
  transition: transform var(--transition), box-shadow var(--transition);
}

.material-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.material-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
}

.material-card-body {
  padding: 20px;
}

.material-card h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 8px;
}

.material-card p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ---------- Collection ---------- */
.collection {
  padding: var(--section-padding);
  background: var(--color-bg-dark);
  color: var(--color-white);
}

.collection .section-title,
.collection .section-subtitle {
  color: var(--color-white);
}

.collection .section-subtitle {
  opacity: 0.7;
}

.collection-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 24px;
}

.collection-item {
  text-align: center;
  padding: 32px 16px;
  background: rgba(255,255,255,0.05);
  border-radius: 8px;
  transition: background var(--transition);
}

.collection-item:hover {
  background: rgba(255,255,255,0.1);
}

.collection-item img {
  width: 80px;
  height: 80px;
  object-fit: contain;
  margin: 0 auto 16px;
  filter: brightness(0) invert(1);
}

.collection-item h3 {
  font-size: 1rem;
  letter-spacing: 0.05em;
  margin-bottom: 4px;
}

.collection-item span {
  font-size: 0.75rem;
  opacity: 0.6;
}

/* ---------- Process ---------- */
.process {
  padding: var(--section-padding);
  background: var(--color-white);
}

.process-steps {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: 32px;
  counter-reset: step;
}

.process-step {
  text-align: center;
  position: relative;
}

.process-step::before {
  counter-increment: step;
  content: "0" counter(step);
  display: block;
  font-family: var(--font-serif);
  font-size: 2.5rem;
  color: var(--color-accent-light);
  opacity: 0.5;
  margin-bottom: 16px;
}

.process-step h3 {
  font-family: var(--font-serif);
  font-size: 1.1rem;
  margin-bottom: 12px;
}

.process-step p {
  font-size: 0.85rem;
  color: var(--color-text-light);
}

/* ---------- Gallery ---------- */
.gallery {
  padding: var(--section-padding);
  background: var(--color-bg);
}

.gallery-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.gallery-grid img {
  width: 100%;
  height: 200px;
  object-fit: cover;
  border-radius: 4px;
  transition: transform var(--transition);
}

.gallery-grid img:hover {
  transform: scale(1.03);
}

/* ---------- FAQ ---------- */
.faq {
  padding: var(--section-padding);
  background: var(--color-white);
}

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border-bottom: 1px solid var(--color-border);
}

.faq-item summary {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 0;
  cursor: pointer;
  font-weight: 500;
  list-style: none;
}

.faq-item summary::-webkit-details-marker {
  display: none;
}

.faq-item summary::after {
  content: "+";
  font-size: 1.4rem;
  color: var(--color-accent);
  transition: transform var(--transition);
}

.faq-item[open] summary::after {
  transform: rotate(45deg);
}

.faq-answer {
  padding: 0 0 20px;
  color: var(--color-text-light);
  font-size: 0.95rem;
}

/* ---------- Footer ---------- */
.site-footer {
  padding: 48px 20px 32px;
  background: var(--color-bg-dark);
  color: var(--color-white);
  text-align: center;
}

.footer-logo img {
  height: 32px;
  margin: 0 auto 24px;
  filter: brightness(0) invert(1);
}

.footer-nav {
  display: flex;
  justify-content: center;
  gap: 24px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.footer-nav a {
  font-size: 0.85rem;
  opacity: 0.8;
}

.footer-nav a:hover {
  opacity: 1;
}

.footer-copy {
  font-size: 0.75rem;
  opacity: 0.5;
}

/* ---------- Responsive ---------- */
@media (max-width: 768px) {
  :root {
    --section-padding: 56px 16px;
  }

  .site-nav {
    display: none;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .gallery-grid img {
    height: 140px;
  }

  .collection-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}