/* =========================================================
   RYOKU-SHO / 緑匠 ― style.css
   ========================================================= */

:root {
  --green: #7aad3a;
  --green-dark: #4a7c2a;
  --bg: #0c0f0a;
  --bg2: #0e120b;
  --card: #141810;
  --fg: #f0ebe0;
  --fg-muted: #7a7a68;
  --fg-sub: #c8c4b4;
  --border: rgba(122, 173, 58, 0.15);
  --gold: #c9a84c;

  --font-serif: 'Noto Serif JP', serif;
  --font-sans: 'Noto Sans JP', sans-serif;
  --font-mono: 'DM Mono', monospace;
}

/* -------------------- Reset / Base -------------------- */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  overflow-x: hidden;
}

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

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

::-webkit-scrollbar {
  width: 4px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: #3a4a2a;
}

/* -------------------- Animations -------------------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(32px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

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

.fade-up {
  animation: fadeUp 0.9s ease both;
}
.fade-up-2 {
  animation: fadeUp 0.9s 0.18s ease both;
}
.fade-up-3 {
  animation: fadeUp 0.9s 0.36s ease both;
}
.fade-up-4 {
  animation: fadeUp 0.9s 0.54s ease both;
}
.scroll-anim {
  width: 100%;
  height: 100%;
  background: var(--green);
  animation: scrollLine 2s ease-in-out infinite;
}

/* Elements revealed via IntersectionObserver (script.js) */
.fade-observe {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}
.fade-observe.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* -------------------- NAV -------------------- */
#site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 1.25rem 4rem;
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 2rem;
  border-bottom: 1px solid transparent;
  background: transparent;
  transition: background 0.5s, border-color 0.5s, backdrop-filter 0.5s;
}

#site-nav.scrolled {
  border-bottom: 1px solid var(--border);
  background: rgba(12, 15, 10, 0.95);
  backdrop-filter: blur(12px);
}

.logo-link {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-right: auto;
}

.logo-img {
  height: 48px;
  width: auto;
}

.logo-text {
  font-family: var(--font-serif);
  color: var(--gold);
  font-size: 0.82rem;
  letter-spacing: 0.2em;
  line-height: 1.4;
}

.nav-desktop {
  display: flex;
  gap: 2.5rem;
  list-style: none;
  margin: 0;
  padding: 0;
}

.nav-link {
  font-family: var(--font-mono);
  color: var(--fg-muted);
  font-size: 0.68rem;
  letter-spacing: 0.14em;
  transition: color 0.3s;
}

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

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

.burger-bar {
  display: block;
  width: 22px;
  height: 1px;
  background: var(--fg);
  transition: transform 0.3s, opacity 0.3s;
}

.nav-burger.open .burger-bar-1 {
  transform: rotate(45deg) translate(4px, 4px);
}
.nav-burger.open .burger-bar-2 {
  opacity: 0;
}
.nav-burger.open .burger-bar-3 {
  transform: rotate(-45deg) translate(4px, -4px);
}

.mobile-menu {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: rgba(12, 15, 10, 0.98);
  border-top: 1px solid var(--border);
  padding: 2rem 2rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.mobile-menu[hidden] {
  display: none;
}

.mobile-link {
  font-family: var(--font-mono);
  color: var(--fg-sub);
  font-size: 0.85rem;
  letter-spacing: 0.12em;
}

/* -------------------- HERO -------------------- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: flex-end;
  background: var(--bg);
  overflow: hidden;
}

.hero-bg-split {
  position: absolute;
  inset: 0;
  display: flex;
}

.hero-bg-half {
  flex: 1;
  overflow: hidden;
  position: relative;
}

.hero-bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.32;
  filter: brightness(0.8) saturate(1.2);
}

.hero-bg-img-bonsai {
  filter: brightness(0.8);
}

.hero-divider {
  position: absolute;
  top: 0;
  bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(
    to bottom,
    transparent,
    var(--border) 20%,
    rgba(201, 168, 76, 0.25) 50%,
    var(--border) 80%,
    transparent
  );
  z-index: 2;
}

.hero-gradient {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, var(--bg) 35%, rgba(12, 15, 10, 0.5) 70%, transparent 100%);
}

.hero-content {
  position: relative;
  z-index: 3;
  padding: 0 4rem 8rem;
  width: 100%;
  max-width: 960px;
  margin: 0 auto;
  text-align: center;
}

.eyebrow {
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.65rem;
  letter-spacing: 0.35em;
  margin-bottom: 2rem;
}

.hero-title-row {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.hero-title {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: clamp(2.8rem, 8vw, 6.5rem);
  font-weight: 300;
  line-height: 1.15;
  letter-spacing: 0.06em;
  margin: 0;
}

.hero-x {
  font-family: var(--font-serif);
  color: var(--gold);
  font-size: clamp(2rem, 5vw, 4rem);
  font-weight: 300;
  line-height: 1;
}

.hero-desc {
  font-family: var(--font-sans);
  color: var(--fg-muted);
  font-size: 0.88rem;
  line-height: 2.2;
  margin-top: 2rem;
  letter-spacing: 0.1em;
}

.hero-cta-row {
  display: flex;
  gap: 1.25rem;
  margin-top: 3rem;
  justify-content: center;
  flex-wrap: wrap;
}

.btn {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.22em;
  padding: 0.9rem 2.4rem;
  display: inline-block;
}

.btn-primary {
  color: var(--bg);
  background: var(--green);
  transition: opacity 0.3s;
}
.btn-primary:hover {
  opacity: 0.8;
}

.btn-secondary {
  color: var(--fg-sub);
  border: 1px solid rgba(201, 168, 76, 0.35);
  transition: border-color 0.3s, color 0.3s;
}
.btn-secondary:hover {
  border-color: rgba(201, 168, 76, 0.7);
  color: var(--gold);
}

.scroll-indicator {
  position: absolute;
  bottom: 2.5rem;
  right: 4rem;
  z-index: 3;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.58rem;
  color: var(--fg-muted);
  letter-spacing: 0.25em;
}

.scroll-track {
  width: 1px;
  height: 60px;
  background: rgba(122, 173, 58, 0.3);
  overflow: hidden;
}

/* -------------------- BRAND STORY -------------------- */
.story-section {
  padding: 8rem 4rem;
  background: var(--bg);
}

.story-grid {
  max-width: 1200px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 7rem;
  align-items: center;
}

.story-image-wrap {
  position: relative;
}

.story-image {
  width: 100%;
  height: 520px;
  object-fit: cover;
  filter: brightness(0.75) contrast(1.1) saturate(1.1);
}

.story-image-frame {
  position: absolute;
  bottom: -18px;
  left: -18px;
  width: 58%;
  height: 32%;
  border: 1px solid rgba(201, 168, 76, 0.2);
  pointer-events: none;
}

.story-vertical-label {
  position: absolute;
  top: 24px;
  right: 24px;
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.55rem;
  letter-spacing: 0.3em;
  writing-mode: vertical-rl;
}

.section-eyebrow {
  font-family: var(--font-mono);
  color: var(--green);
  font-size: 0.62rem;
  letter-spacing: 0.35em;
  margin-bottom: 1.5rem;
}

.story-heading {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  line-height: 1.6;
  letter-spacing: 0.06em;
  margin: 0;
}

.divider-line {
  width: 36px;
  height: 1px;
  background: var(--gold);
  margin: 2.2rem 0;
}

.story-paragraphs {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.story-paragraphs p {
  font-family: var(--font-sans);
  color: var(--fg-muted);
  font-size: 0.86rem;
  line-height: 2.2;
  letter-spacing: 0.07em;
  margin: 0;
}

.philosophy-list {
  margin-top: 3rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

.philosophy-item {
  display: flex;
  gap: 1.25rem;
  align-items: flex-start;
  border-top: 1px solid var(--border);
  padding-top: 1.25rem;
}

.philosophy-jp {
  font-family: var(--font-serif);
  color: var(--gold);
  font-size: 2.2rem;
  font-weight: 300;
  line-height: 1;
  flex-shrink: 0;
}

.philosophy-en {
  font-family: var(--font-mono);
  color: var(--green-dark);
  font-size: 0.58rem;
  letter-spacing: 0.25em;
  margin: 0 0 0.4rem;
}

.philosophy-desc {
  font-family: var(--font-sans);
  color: var(--fg-muted);
  font-size: 0.82rem;
  line-height: 1.9;
  letter-spacing: 0.06em;
  margin: 0;
}

/* -------------------- QUOTE BREAK -------------------- */
.quote-break {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding: 5rem 4rem;
  text-align: center;
}

.quote-text {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: clamp(1.1rem, 2.5vw, 1.8rem);
  font-weight: 300;
  line-height: 2;
  letter-spacing: 0.14em;
  margin: 0;
}

.quote-signature {
  font-family: var(--font-mono);
  color: var(--gold);
  font-size: 0.6rem;
  letter-spacing: 0.35em;
  margin-top: 1.5rem;
}

/* -------------------- PRODUCTS -------------------- */
.products-section {
  padding: 8rem 4rem;
  background: var(--bg);
}

.products-wrap {
  max-width: 1200px;
  margin: 0 auto;
}

.products-heading {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  font-weight: 300;
  line-height: 1.5;
  letter-spacing: 0.06em;
  margin-bottom: 4rem;
}

.products-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 2px;
  background: var(--border);
}

.product-card {
  background: var(--bg2);
  transition: background 0.4s;
  cursor: pointer;
}

.product-card:hover {
  background: var(--card);
}

.product-image-wrap {
  overflow: hidden;
  position: relative;
  height: 380px;
}

.product-image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.9);
  transform: scale(1);
  transition: transform 0.7s ease;
}

.product-card:hover .product-image {
  transform: scale(1.06);
}

.product-tag {
  position: absolute;
  top: 14px;
  left: 14px;
  font-family: var(--font-mono);
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  color: var(--bg);
  background: var(--green);
  padding: 0.2rem 0.65rem;
}

.product-body {
  padding: 2.2rem 2rem;
}

.product-num {
  font-family: var(--font-mono);
  color: var(--fg-muted);
  font-size: 0.58rem;
  letter-spacing: 0.2em;
  margin-bottom: 0.5rem;
}

.product-title {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: 0.08em;
  margin: 0 0 0.3rem;
}

.product-subtitle {
  font-family: var(--font-mono);
  color: var(--green-dark);
  font-size: 0.6rem;
  letter-spacing: 0.12em;
  margin-bottom: 1.25rem;
}

.product-desc {
  font-family: var(--font-sans);
  color: var(--fg-muted);
  font-size: 0.82rem;
  line-height: 2;
  letter-spacing: 0.06em;
  margin-bottom: 2rem;
}

.product-cta {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.2em;
  color: var(--fg);
  border: 1px solid var(--border);
  padding: 0.85rem 1.75rem;
  transition: border-color 0.3s, color 0.3s;
}

.product-cta:hover {
  border-color: rgba(122, 173, 58, 0.6);
  color: var(--green);
}

/* -------------------- FOOTER -------------------- */
.site-footer {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 3rem 4rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 2rem;
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.footer-logo {
  height: 40px;
  width: auto;
}

.footer-brand-jp {
  font-family: var(--font-serif);
  color: var(--fg);
  font-size: 0.88rem;
  letter-spacing: 0.15em;
  margin: 0;
}

.footer-brand-en {
  font-family: var(--font-mono);
  color: #3a4a2a;
  font-size: 0.55rem;
  letter-spacing: 0.2em;
  margin: 0;
}

.footer-links {
  display: flex;
  gap: 2rem;
  flex-wrap: wrap;
}

.footer-link {
  font-family: var(--font-mono);
  color: #3a4a2a;
  font-size: 0.58rem;
  letter-spacing: 0.15em;
  transition: color 0.3s;
}

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

.footer-copyright {
  font-family: var(--font-mono);
  color: #3a4a2a;
  font-size: 0.55rem;
  letter-spacing: 0.15em;
  margin: 0;
}

/* -------------------- RESPONSIVE -------------------- */
@media (max-width: 900px) {
  .nav-desktop {
    display: none !important;
  }
  .nav-burger {
    display: flex !important;
  }
}

@media (max-width: 800px) {
  .story-grid,
  .products-grid {
    grid-template-columns: 1fr !important;
    gap: 3rem !important;
  }
}

@media (max-width: 640px) {
  #site-nav {
    padding: 1rem 1.5rem;
  }

  .hero-content {
    padding: 0 1.5rem 5rem;
  }

  .story-section,
  .products-section {
    padding: 5rem 1.5rem;
  }

  .quote-break {
    padding: 3rem 1.5rem;
  }

  .site-footer {
    padding: 2rem 1.5rem;
    justify-content: center;
    text-align: center;
  }

  .story-image {
    height: 320px;
  }

  .product-image-wrap {
    height: 260px;
  }
}

/* -------------------- LANG SWITCHER -------------------- */
.lang-switcher {
  position: relative;
  display: flex;
  align-items: center;
}

.lang-details {
  position: relative;
}

.lang-current {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  list-style: none;
  cursor: pointer;
  user-select: none;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.12em;
  color: var(--fg-sub);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.42rem 0.85rem;
  transition: color 0.3s, border-color 0.3s;
}

.lang-current::-webkit-details-marker {
  display: none;
}
.lang-current::marker {
  content: "";
}

.lang-current:hover,
.lang-details[open] .lang-current {
  color: var(--green);
  border-color: var(--green);
}

.lang-current-arrow {
  font-size: 0.55rem;
  transition: transform 0.3s;
}
.lang-details[open] .lang-current-arrow {
  transform: rotate(180deg);
}

.lang-menu {
  position: absolute;
  top: calc(100% + 0.6rem);
  right: 0;
  min-width: 140px;
  list-style: none;
  margin: 0;
  padding: 0.4rem;
  background: rgba(12, 15, 10, 0.98);
  border: 1px solid var(--border);
  border-radius: 10px;
  backdrop-filter: blur(12px);
  z-index: 200;
}

.lang-option {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
  padding: 0.55rem 0.7rem;
  border-radius: 6px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.06em;
  color: var(--fg-muted);
  transition: background 0.25s, color 0.25s;
}

.lang-option:hover {
  background: rgba(122, 173, 58, 0.14);
  color: var(--fg);
}

.lang-option.is-active {
  color: var(--gold);
}
.lang-option.is-active::after {
  content: "\2713";
  font-size: 0.65rem;
}

@media (max-width: 640px) {
  .lang-current {
    padding: 0.32rem 0.6rem;
    font-size: 0.6rem;
  }
}