/* ---------- Theme tokens ---------- */
:root {
  --background: #fbfaf6;
  --foreground: #1a1a1a;
  --accent-indigo: #2a3a5e;
  --accent-deep-green: #1f3d2a;
  --accent-autumn: #9a3a2b;
  --paper: #f3efe5;
  --rule: #d9d3c3;

  --font-serif: "Noto Serif JP", "Hiragino Mincho ProN", "Yu Mincho", serif;
  --font-sans: "Noto Sans JP", "Hiragino Kaku Gothic ProN", "Yu Gothic",
    sans-serif;
  --font-inter: "Inter", system-ui, sans-serif;
}

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

html,
body {
  height: 100%;
}

body {
  background: var(--background);
  color: var(--foreground);
  font-family: var(--font-sans);
  font-feature-settings: "palt";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.7;
}

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

ul {
  list-style: none;
}

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

::selection {
  background: var(--accent-indigo);
  color: var(--paper);
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: 1120px;
  margin: 0 auto;
  padding: 0 24px;
}

.eyebrow {
  font-family: var(--font-inter);
  font-size: 11px;
  letter-spacing: 0.4em;
  text-transform: uppercase;
  color: var(--accent-indigo);
}

.eyebrow-light {
  color: rgba(243, 239, 229, 0.85);
}

.section-title {
  margin-top: 24px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(22px, 3vw, 30px);
  letter-spacing: 0.08em;
  line-height: 1.7;
}

.rule {
  display: block;
  width: 40px;
  height: 1px;
  margin: 28px 0;
  background: var(--rule);
}

.rule-accent {
  background: var(--accent-indigo);
}

.rule-light {
  background: rgba(243, 239, 229, 0.4);
  margin-left: auto;
  margin-right: auto;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 16px 40px;
  font-size: 13px;
  letter-spacing: 0.2em;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  cursor: pointer;
}

.btn-primary {
  background: var(--accent-indigo);
  color: var(--paper);
}

.btn-primary:hover {
  background: var(--foreground);
}

.btn-outline {
  border-color: var(--rule);
  color: var(--foreground);
}

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

.btn-light {
  border-color: rgba(243, 239, 229, 0.6);
  color: var(--paper);
  margin-top: 48px;
}

.btn-light:hover {
  background: var(--paper);
  color: var(--accent-indigo);
}

.sp-only {
  display: none;
}

@media (max-width: 768px) {
  .sp-only {
    display: inline;
  }
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: rgba(251, 250, 246, 0.9);
  backdrop-filter: saturate(180%) blur(8px);
  border-bottom: 1px solid var(--rule);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px;
}

.brand {
  display: flex;
  align-items: baseline;
  gap: 12px;
  font-family: var(--font-serif);
}

.brand-jp {
  font-size: 20px;
  letter-spacing: 0.18em;
}

.brand-en {
  font-family: var(--font-inter);
  font-size: 10px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(26, 26, 26, 0.6);
}

.nav {
  display: flex;
  gap: 32px;
  font-size: 13px;
  letter-spacing: 0.1em;
  color: rgba(26, 26, 26, 0.8);
}

.nav a {
  transition: color 0.2s ease;
}

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

@media (max-width: 768px) {
  .nav {
    display: none;
  }
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  isolation: isolate;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: -2;
  background: linear-gradient(
    180deg,
    var(--paper) 0%,
    var(--background) 60%,
    var(--background) 100%
  );
}

.hero-wave {
  position: absolute;
  inset-inline: 0;
  bottom: 0;
  z-index: -1;
  width: 100%;
  color: var(--accent-indigo);
  opacity: 0.15;
}

.hero-wave path {
  fill: currentColor;
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding-top: 128px;
  padding-bottom: 128px;
}

@media (min-width: 768px) {
  .hero-inner {
    padding-top: 176px;
    padding-bottom: 176px;
  }
}

.hero-title {
  margin-top: 32px;
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: clamp(34px, 6vw, 60px);
  letter-spacing: 0.08em;
  line-height: 1.5;
}

.hero-lead {
  margin-top: 32px;
  max-width: 32em;
  font-size: 15px;
  line-height: 2.1;
  color: rgba(26, 26, 26, 0.78);
}

.hero-actions {
  display: flex;
  flex-direction: column;
  gap: 16px;
  margin-top: 56px;
}

@media (min-width: 640px) {
  .hero-actions {
    flex-direction: row;
  }
}

/* ---------- Concept ---------- */
.concept {
  background: var(--paper);
  padding: 112px 0;
}

@media (min-width: 768px) {
  .concept {
    padding: 160px 0;
  }
}

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

@media (min-width: 768px) {
  .concept-inner {
    grid-template-columns: 1fr 1fr;
    gap: 64px;
  }
}

.concept-visual {
  aspect-ratio: 4 / 5;
  background: linear-gradient(
    135deg,
    rgba(42, 58, 94, 0.18) 0%,
    rgba(217, 211, 195, 0.4) 50%,
    rgba(31, 61, 42, 0.12) 100%
  );
  border: 1px solid var(--rule);
}

.concept-text p {
  font-size: 14px;
  line-height: 2.1;
  color: rgba(26, 26, 26, 0.82);
  margin-top: 16px;
}

.concept-text p:first-of-type {
  margin-top: 32px;
}

/* ---------- Products ---------- */
.products {
  padding: 112px 0;
}

@media (min-width: 768px) {
  .products {
    padding: 160px 0;
  }
}

.section-head {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}

.section-head .rule {
  margin: 24px 0 0;
}

.product-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 40px;
  margin-top: 80px;
}

@media (min-width: 768px) {
  .product-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.product-card {
  display: flex;
  flex-direction: column;
}

.product-visual {
  aspect-ratio: 3 / 4;
  border: 1px solid var(--rule);
  transition: transform 0.4s ease;
}

.product-card:hover .product-visual {
  transform: translateY(-4px);
}

.product-tone-spring {
  background: linear-gradient(
    135deg,
    rgba(42, 58, 94, 0.28) 0%,
    var(--paper) 100%
  );
}

.product-tone-summer {
  background: linear-gradient(
    135deg,
    rgba(31, 61, 42, 0.28) 0%,
    var(--paper) 100%
  );
}

.product-tone-autumn {
  background: linear-gradient(
    135deg,
    rgba(154, 58, 43, 0.22) 0%,
    var(--paper) 100%
  );
}

.product-meta {
  margin-top: 24px;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
}

.product-meta h3 {
  font-family: var(--font-serif);
  font-weight: 500;
  font-size: 18px;
  letter-spacing: 0.08em;
}

.season {
  font-family: var(--font-inter);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(26, 26, 26, 0.6);
}

.product-card p {
  margin-top: 12px;
  font-size: 12px;
  line-height: 2;
  color: rgba(26, 26, 26, 0.7);
}

/* ---------- Closer / Contact ---------- */
.closer {
  background: var(--accent-indigo);
  color: var(--paper);
  padding: 112px 0;
}

@media (min-width: 768px) {
  .closer {
    padding: 160px 0;
  }
}

.closer-inner {
  max-width: 720px;
  margin: 0 auto;
  text-align: center;
}

.closer-title {
  margin-top: 24px;
}

.closer p {
  margin-top: 32px;
  font-size: 14px;
  line-height: 2.1;
  opacity: 0.9;
}

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

.footer-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

@media (min-width: 768px) {
  .footer-inner {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-inner .brand-jp {
  font-family: var(--font-serif);
  letter-spacing: 0.18em;
}

.copy {
  font-family: var(--font-inter);
  font-size: 11px;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  color: rgba(26, 26, 26, 0.6);
}