/* ========================================================================
   /Kagari — 公式サイト スタイル
   役割: 篝籠の格子 × デジタルの精密さ × 燠火のアクセント
   ======================================================================== */

/* ---------- デザイントークン ---------- */
:root {
  /* 色: 夕暮れ〜行灯の明るさ。和紙の暖かみを含む中明度ベース */
  --c-bg:        #1C1A24;
  --c-bg-2:      #252231;
  --c-surface:   #2E2A3A;
  --c-ink:       #F5EEDF;
  --c-ink-dim:   #A69F8E;
  --c-line:      #3A3545;
  --c-line-2:    #4A4356;
  --c-ember:     #F0B259;
  --c-flame:     #E05A2A;
  --c-gold:      #FBD994;
  --c-red:       #B03525;

  /* タイポ */
  --f-jp-serif:  "Shippori Mincho", "Noto Serif JP", serif;
  --f-jp-sans:   "Noto Sans JP", system-ui, sans-serif;
  --f-en-serif:  "Cormorant Garamond", "Times New Roman", serif;
  --f-mono:      "JetBrains Mono", ui-monospace, monospace;

  --t-hero:      clamp(4rem, 2rem + 10vw, 11rem);
  --t-h2:        clamp(2rem, 1.2rem + 3vw, 3.5rem);
  --t-body:      clamp(0.95rem, 0.88rem + 0.3vw, 1.05rem);

  /* 余白 */
  --sp-section:  clamp(5rem, 3rem + 7vw, 10rem);

  /* 動き */
  --e-out:       cubic-bezier(0.16, 1, 0.3, 1);
  --d-slow:      1200ms;
  --d-med:       600ms;
  --d-fast:      240ms;
}

/* ---------- リセット ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--c-bg);
  color: var(--c-ink);
  font-family: var(--f-jp-sans);
  font-size: var(--t-body);
  line-height: 1.8;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font: inherit; cursor: pointer; border: 0; background: none; color: inherit; }

/* 和の縦ラインで全体を引き締める */
body::before {
  content: "";
  position: fixed;
  top: 0; bottom: 0;
  left: 50%;
  width: 1px;
  background: linear-gradient(to bottom, transparent, var(--c-line) 30%, var(--c-line) 70%, transparent);
  opacity: 0.35;
  pointer-events: none;
  z-index: 1;
}

/* ---------- ナビ ---------- */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.25rem 2rem;
  z-index: 100;
  mix-blend-mode: normal;
  background: linear-gradient(to bottom, rgba(7, 9, 17, 0.8), transparent);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}
.nav__brand {
  font-family: var(--f-en-serif);
  font-size: 1.4rem;
  letter-spacing: 0.02em;
  display: flex;
  align-items: baseline;
  gap: 0.05em;
}
.brand__slash {
  color: var(--c-ember);
  font-weight: 600;
  font-size: 1.2em;
  text-shadow: 0 0 12px rgba(232, 163, 61, 0.6);
}
.brand__name { color: var(--c-ink); font-weight: 500; }
.nav__menu {
  display: flex;
  gap: 2rem;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
}
.nav__menu a {
  color: var(--c-ink-dim);
  transition: color var(--d-fast) var(--e-out);
  position: relative;
}
.nav__menu a:hover { color: var(--c-gold); }
.nav__menu a::after {
  content: "";
  position: absolute;
  left: 0; bottom: -4px;
  width: 0;
  height: 1px;
  background: var(--c-ember);
  transition: width var(--d-med) var(--e-out);
}
.nav__menu a:hover::after { width: 100%; }

@media (max-width: 640px) {
  .nav { padding: 1rem 1.25rem; }
  .nav__menu { gap: 1rem; font-size: 0.7rem; }
}

/* ========================================================================
   HERO: 篝籠の格子 + 火の粉 + 大きなロゴ
   ======================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  padding: 8rem 2rem 4rem;
  background:
    radial-gradient(ellipse at 50% 40%, rgba(240, 178, 89, 0.1), transparent 55%),
    radial-gradient(ellipse at 50% 80%, rgba(224, 90, 42, 0.22), transparent 55%),
    radial-gradient(ellipse at 50% 130%, rgba(251, 217, 148, 0.28), transparent 60%),
    var(--c-bg);
}

/* 火の粉 canvas */
.hero__canvas {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 1;
  opacity: 0.9;
}

/* 篝籠の格子 SVG */
.hero__lattice {
  position: absolute; inset: 0;
  width: 100%; height: 100%;
  z-index: 2;
  opacity: 0.55;
  mix-blend-mode: screen;
}

/* カーソル追従グロー */
.hero__cursor-glow {
  position: absolute;
  width: 420px; height: 420px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(244, 199, 122, 0.25), rgba(232, 163, 61, 0.08) 40%, transparent 70%);
  pointer-events: none;
  transform: translate(-50%, -50%);
  left: 50%; top: 50%;
  z-index: 3;
  mix-blend-mode: screen;
  transition: opacity 300ms var(--e-out);
  opacity: 0;
}
.hero:hover .hero__cursor-glow { opacity: 1; }

/* Hero 本体 */
.hero__content {
  position: relative;
  z-index: 10;
  text-align: center;
  max-width: 1100px;
}
.hero__eyebrow {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.35em;
  color: var(--c-ink-dim);
  text-transform: uppercase;
  margin-bottom: 3rem;
  opacity: 0;
  animation: fadeInUp 1.2s 0.2s var(--e-out) forwards;
}
.hero__title {
  font-family: var(--f-en-serif);
  font-size: var(--t-hero);
  font-weight: 500;
  line-height: 0.95;
  letter-spacing: -0.02em;
  display: flex;
  justify-content: center;
  align-items: baseline;
  gap: 0.02em;
  margin-bottom: 2.5rem;
}
.hero__slash {
  color: var(--c-ember);
  font-weight: 600;
  font-size: 1.1em;
  position: relative;
  animation: slashPulse 3.5s ease-in-out infinite;
  filter: drop-shadow(0 0 24px rgba(232, 163, 61, 0.65));
}
.hero__slash::before {
  content: attr(data-text);
  position: absolute;
  inset: 0;
  color: var(--c-gold);
  filter: blur(14px);
  opacity: 0.6;
  animation: slashFlicker 4.2s ease-in-out infinite;
}
.hero__kagari {
  color: var(--c-ink);
  font-style: italic;
  opacity: 0;
  animation: fadeInUp 1.4s 0.6s var(--e-out) forwards;
}
@keyframes slashPulse {
  0%, 100% { transform: translateY(0); filter: drop-shadow(0 0 24px rgba(232, 163, 61, 0.65)); }
  50%      { transform: translateY(-2px); filter: drop-shadow(0 0 38px rgba(244, 199, 122, 0.9)); }
}
@keyframes slashFlicker {
  0%, 100% { opacity: 0.5; transform: scale(1); }
  30%      { opacity: 0.8; transform: scale(1.08); }
  55%      { opacity: 0.35; transform: scale(0.97); }
  75%      { opacity: 0.7; transform: scale(1.05); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

.hero__tag-ja {
  font-family: var(--f-jp-serif);
  font-size: clamp(1.25rem, 0.8rem + 1.2vw, 1.9rem);
  font-weight: 500;
  letter-spacing: 0.18em;
  color: var(--c-ink);
  margin-bottom: 0.5rem;
  opacity: 0;
  animation: fadeInUp 1.2s 1s var(--e-out) forwards;
}
.hero__tag-en {
  font-family: var(--f-en-serif);
  font-style: italic;
  font-size: 0.95rem;
  letter-spacing: 0.3em;
  color: var(--c-ember);
  text-transform: uppercase;
  margin-bottom: 4rem;
  opacity: 0;
  animation: fadeInUp 1.2s 1.3s var(--e-out) forwards;
}

.hero__scroll {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--c-ink-dim);
  text-transform: uppercase;
  opacity: 0;
  animation: fadeInUp 1.2s 1.6s var(--e-out) forwards;
}
.hero__scroll-line {
  width: 1px; height: 60px;
  background: linear-gradient(to bottom, var(--c-ember), transparent);
  position: relative;
  overflow: hidden;
}
.hero__scroll-line::after {
  content: "";
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 30%;
  background: var(--c-gold);
  animation: scrollDot 2s ease-in-out infinite;
}
@keyframes scrollDot {
  0%   { top: -30%; opacity: 0; }
  20%  { opacity: 1; }
  80%  { opacity: 1; }
  100% { top: 110%; opacity: 0; }
}

/* ========================================================================
   セクション共通
   ======================================================================== */
section:not(.hero) {
  position: relative;
  padding: var(--sp-section) 2rem;
  max-width: 1280px;
  margin: 0 auto;
  z-index: 5;
}
.section__index {
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.3em;
  color: var(--c-ember);
  text-transform: uppercase;
  margin-bottom: 1.5rem;
}
.section__title {
  font-family: var(--f-jp-serif);
  font-size: var(--t-h2);
  font-weight: 700;
  line-height: 1.1;
  margin-bottom: 4rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.title__jp { color: var(--c-ink); }
.title__en {
  font-family: var(--f-en-serif);
  font-style: italic;
  font-weight: 400;
  font-size: 0.45em;
  color: var(--c-ember);
  letter-spacing: 0.08em;
}

/* 上から現れるリビール */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 900ms var(--e-out), transform 900ms var(--e-out);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========================================================================
   ABOUT
   ======================================================================== */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem 5rem;
  align-items: start;
}
.about__lead {
  font-family: var(--f-jp-serif);
  font-size: clamp(1.3rem, 0.9rem + 1vw, 1.8rem);
  line-height: 1.7;
  color: var(--c-ink);
  border-left: 1px solid var(--c-ember);
  padding-left: 1.5rem;
}
.about__lead em {
  color: var(--c-ember);
  font-style: normal;
  background: linear-gradient(transparent 60%, rgba(232, 163, 61, 0.18) 60%);
}
.about__body p {
  margin-bottom: 1.5rem;
  color: var(--c-ink);
  opacity: 0.85;
}
.about__principles {
  grid-column: 1 / -1;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  margin-top: 2rem;
}
.about__principles li {
  background: var(--c-bg);
  padding: 2rem 1.5rem;
  font-family: var(--f-jp-serif);
  font-size: 1.05rem;
  line-height: 1.7;
  position: relative;
  transition: background 300ms var(--e-out);
}
.about__principles li:hover { background: var(--c-bg-2); }
.about__principles li span {
  display: block;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--c-ember);
  margin-bottom: 0.75rem;
}
@media (max-width: 860px) {
  .about__grid { grid-template-columns: 1fr; gap: 2.5rem; }
  .about__principles { grid-template-columns: 1fr; }
}

/* ========================================================================
   PRODUCTS — 索引型グリッド
   ======================================================================== */
.products__note {
  color: var(--c-ink-dim);
  margin-bottom: 2.5rem;
  font-size: 0.9rem;
  max-width: 60ch;
}

/* 密なグリッド: 増えても1画面に収まる */
.products__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1px;
  background: var(--c-line);
  border: 1px solid var(--c-line);
  margin-bottom: 5rem;
}
.product-cell {
  background: var(--c-bg);
  position: relative;
  transition: background 400ms var(--e-out), transform 400ms var(--e-out);
}
.product-cell--placeholder {
  background: var(--c-bg);
  min-height: 120px;
  display: flex;
  align-items: center;
  justify-content: center;
}
.product-cell__empty {
  color: var(--c-line-2);
  font-family: var(--f-mono);
  font-size: 1.2rem;
}
.product-cell__link {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 1rem;
  padding: 1.25rem 1.5rem;
  min-height: 120px;
  position: relative;
  z-index: 2;
}
.product-cell__icon {
  width: 52px; height: 52px;
  border: 1px solid var(--c-line-2);
  display: grid;
  place-items: center;
  background: var(--c-surface);
  transition: border-color 400ms var(--e-out), background 400ms var(--e-out);
}
.product-cell__mono {
  font-family: var(--f-mono);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--c-ember);
  letter-spacing: 0.05em;
}
.product-cell__meta {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 0;
}
.product-cell__name {
  font-family: var(--f-jp-serif);
  font-size: 1rem;
  font-weight: 700;
  color: var(--c-ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-cell__tag {
  font-size: 0.72rem;
  color: var(--c-ink-dim);
  font-family: var(--f-jp-sans);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.product-cell__status {
  font-size: 0.6rem;
  color: var(--c-ember);
  letter-spacing: 0;
}
.product-cell[data-status="developing"] .product-cell__status { color: var(--c-ink-dim); }

/* ホバー時の燠火 */
.product-cell:hover {
  background: var(--c-bg-2);
  z-index: 3;
  transform: scale(1.02);
  box-shadow:
    0 0 0 1px var(--c-ember),
    0 0 40px rgba(232, 163, 61, 0.4),
    0 0 80px rgba(200, 74, 31, 0.15);
}
.product-cell:hover .product-cell__icon {
  border-color: var(--c-ember);
  background: rgba(232, 163, 61, 0.08);
}
.product-cell:hover .product-cell__mono {
  color: var(--c-gold);
  text-shadow: 0 0 12px rgba(244, 199, 122, 0.6);
}

/* 注目製品 */
.products__feature {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  align-items: center;
  padding-top: 3rem;
  border-top: 1px solid var(--c-line);
}
.feature__label {
  writing-mode: vertical-rl;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.35em;
  color: var(--c-ember);
  align-self: start;
  padding-top: 1rem;
}
.feature__card {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: center;
}
.feature__visual {
  position: relative;
  width: 280px; height: 280px;
  background: linear-gradient(145deg, var(--c-surface), var(--c-bg-2));
  border: 1px solid var(--c-line-2);
  display: grid;
  place-items: center;
  overflow: hidden;
}
.feature__pulse {
  position: absolute;
  width: 180px; height: 180px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(232, 163, 61, 0.5), transparent 70%);
  animation: firePulse 3s ease-in-out infinite;
}
@keyframes firePulse {
  0%, 100% { transform: scale(0.85); opacity: 0.6; }
  50%      { transform: scale(1.1); opacity: 0.9; }
}
.feature__mono {
  position: relative;
  font-family: var(--f-en-serif);
  font-size: 6rem;
  font-weight: 600;
  color: var(--c-gold);
  font-style: italic;
  text-shadow: 0 0 20px rgba(244, 199, 122, 0.6);
  z-index: 2;
}
.feature__text h3 {
  font-family: var(--f-jp-serif);
  font-size: 2rem;
  margin-bottom: 1rem;
}
.feature__text p {
  color: var(--c-ink);
  opacity: 0.85;
  margin-bottom: 2rem;
  max-width: 50ch;
}
.feature__actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.9rem 1.8rem;
  font-family: var(--f-mono);
  font-size: 0.78rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  border: 1px solid var(--c-line-2);
  transition: all var(--d-fast) var(--e-out);
}
.btn--primary {
  background: var(--c-ember);
  color: var(--c-bg);
  border-color: var(--c-ember);
}
.btn--primary:hover {
  background: var(--c-gold);
  border-color: var(--c-gold);
  box-shadow: 0 0 24px rgba(244, 199, 122, 0.5);
}
.btn--ghost {
  color: var(--c-ink-dim);
}
.btn--ghost[aria-disabled="true"] {
  opacity: 0.5;
  cursor: not-allowed;
}

@media (max-width: 860px) {
  .products__feature { grid-template-columns: 1fr; }
  .feature__label { writing-mode: horizontal-tb; }
  .feature__card { grid-template-columns: 1fr; gap: 2rem; }
  .feature__visual { width: 100%; height: 200px; }
}

/* ========================================================================
   CONTACT
   ======================================================================== */
.contact__grid {
  display: grid;
  gap: 2.5rem;
}
.contact__lead {
  color: var(--c-ink);
  opacity: 0.85;
  max-width: 50ch;
}
.contact__email {
  display: grid;
  grid-template-columns: auto 1fr auto;
  gap: 2rem;
  align-items: center;
  padding: 2rem 2.5rem;
  border: 1px solid var(--c-line-2);
  background: var(--c-surface);
  transition: all var(--d-med) var(--e-out);
}
.contact__email:hover {
  border-color: var(--c-ember);
  background: var(--c-bg-2);
  box-shadow: 0 0 50px rgba(232, 163, 61, 0.25);
}
.contact__email-label {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--c-ember);
}
.contact__email-addr {
  font-family: var(--f-en-serif);
  font-size: clamp(1.2rem, 0.9rem + 1vw, 1.8rem);
  font-style: italic;
  color: var(--c-ink);
}
.contact__email-arrow {
  color: var(--c-ember);
  font-size: 1.5rem;
  transition: transform var(--d-fast) var(--e-out);
}
.contact__email:hover .contact__email-arrow { transform: translateX(8px); }

/* ========================================================================
   FOOTER
   ======================================================================== */
.footer {
  margin-top: var(--sp-section);
  padding: 4rem 2rem 2rem;
  border-top: 1px solid var(--c-line);
  background: var(--c-bg-2);
}
.footer__top {
  max-width: 1280px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: 4rem;
  padding-bottom: 3rem;
}
.footer__brand {
  font-family: var(--f-en-serif);
  font-size: 2rem;
}
.footer__tag {
  margin-top: 0.5rem;
  font-family: var(--f-en-serif);
  font-style: italic;
  font-size: 0.9rem;
  color: var(--c-ember);
  letter-spacing: 0.15em;
}
.footer__nav {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.footer__nav h4 {
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  color: var(--c-ember);
  text-transform: uppercase;
  margin-bottom: 1rem;
}
.footer__nav ul { display: flex; flex-direction: column; gap: 0.5rem; }
.footer__nav a {
  color: var(--c-ink-dim);
  font-size: 0.88rem;
  transition: color var(--d-fast) var(--e-out);
}
.footer__nav a:hover { color: var(--c-gold); }
.footer__bottom {
  max-width: 1280px;
  margin: 0 auto;
  padding-top: 2rem;
  border-top: 1px solid var(--c-line);
  display: flex;
  justify-content: space-between;
  font-family: var(--f-mono);
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  color: var(--c-ink-dim);
  text-transform: uppercase;
}
@media (max-width: 760px) {
  .footer__top { grid-template-columns: 1fr; }
  .footer__nav { grid-template-columns: repeat(2, 1fr); }
}

/* ========================================================================
   汎用: 詳細ページ・法的ページ
   ======================================================================== */
.page {
  max-width: 780px;
  margin: 0 auto;
  padding: 10rem 2rem 6rem;
  z-index: 5;
  position: relative;
}
.page h1 {
  font-family: var(--f-jp-serif);
  font-size: clamp(2rem, 1.4rem + 2vw, 3rem);
  margin-bottom: 2rem;
  line-height: 1.2;
}
.page h2 {
  font-family: var(--f-jp-serif);
  font-size: 1.4rem;
  margin: 2.5rem 0 1rem;
  color: var(--c-ember);
}
.page p, .page li { margin-bottom: 1rem; opacity: 0.9; }
.page ul, .page ol { padding-left: 1.5rem; margin-bottom: 1.5rem; }
.page a { color: var(--c-gold); text-decoration: underline; }
.page__back {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--f-mono);
  font-size: 0.75rem;
  letter-spacing: 0.2em;
  color: var(--c-ember);
  text-transform: uppercase;
  margin-bottom: 3rem;
}
.page table {
  width: 100%;
  border-collapse: collapse;
  margin: 1.5rem 0;
  font-size: 0.9rem;
}
.page th, .page td {
  border: 1px solid var(--c-line);
  padding: 0.75rem 1rem;
  text-align: left;
  vertical-align: top;
}
.page th {
  background: var(--c-surface);
  color: var(--c-ember);
  font-family: var(--f-jp-serif);
  width: 30%;
  white-space: nowrap;
}

/* ========================================================================
   モーション削減対応
   ======================================================================== */
@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;
  }
  .hero__canvas { display: none; }
}