/*
Theme Name: i.GRID Theme
Theme URI: https://example.com/
Description: Theme for i.GRID Project
Author: Project i
Author URI: https://example.com/
Version: 1.0
*/

:root {
  --bg: #fcfbf8;
  --fg: #1a1a18;
  --gold: #8B7A2E;
  --gold-faint: rgba(139, 122, 46, 0.05);
  --gold-line: rgba(139, 122, 46, 0.15);
  --dim: #999384;
  --muted: #c4bca8;
  --serif: 'Noto Serif JP', '游明朝', serif;
  --display: 'Cormorant Garamond', serif;
}

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

html {
  scroll-behavior: smooth;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--serif);
  overflow-x: hidden;
}

body {
  -webkit-font-smoothing: antialiased;
}

::selection {
  background: rgba(139, 122, 46, 0.15);
}

/* NAV */
nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  padding: 28px 48px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: rgba(252, 251, 248, 0.92);
  backdrop-filter: blur(12px);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
}

.nav-logo svg {
  width: 36px;
  height: 36px;
}

.nav-logo-text {
  font-family: var(--display);
  font-size: 16px;
  color: var(--gold);
  letter-spacing: 0.3em;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  border: 1px solid var(--gold-line);
  background: transparent;
  border-radius: 4px;
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
}

.nav-toggle-bar {
  width: 18px;
  height: 1px;
  background: var(--gold);
  transition: transform 0.25s ease, opacity 0.25s ease;
}

.nav-links {
  display: flex;
  gap: 40px;
}

.nav-links a {
  font-size: 15px;
  letter-spacing: 0.15em;
  color: var(--dim);
  text-decoration: none;
  transition: color 0.3s;
}

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

/* HERO */
.hero {
  height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  padding: 0 24px;
  position: relative;
}

.hero-mark {
  opacity: 0;
  animation: fadeIn 2s ease-out 0.3s forwards;
}

.hero-mark svg {
  width: clamp(72px, 10vw, 100px);
  height: clamp(72px, 10vw, 100px);
}

.hero-title {
  font-weight: 200;
  font-size: clamp(22px, 3.2vw, 34px);
  letter-spacing: 0.2em;
  color: var(--fg);
  margin-top: 40px;
  opacity: 0;
  animation: fadeIn 2s ease-out 0.9s forwards;
}

.hero-en {
  font-family: var(--display);
  font-size: clamp(12px, 1.2vw, 14px);
  letter-spacing: 0.4em;
  color: var(--dim);
  margin-top: 14px;
  opacity: 0;
  animation: fadeIn 2s ease-out 1.3s forwards;
}

.scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  opacity: 0;
  animation: fadeIn 2s ease-out 2.2s forwards;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--muted), transparent);
  animation: scrollPulse 2.5s ease-in-out infinite;
}

/* SECTIONS */
section {
  padding: 120px 24px;
  position: relative;
}

.container {
  max-width: 760px;
  margin: 0 auto;
}

.section-label {
  font-family: var(--display);
  font-size: 16px;
  letter-spacing: 0.4em;
  color: var(--dim);
  margin-bottom: 48px;
  opacity: 0;
  transform: translateY(16px);
}

.section-title {
  font-weight: 200;
  font-size: clamp(24px, 4vw, 42px);
  letter-spacing: 0.1em;
  line-height: 1.8;
  color: var(--fg);
  margin-bottom: 40px;
  opacity: 0;
  transform: translateY(20px);
}

.section-body {
  font-weight: 300;
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 2.4;
  color: var(--dim);
  letter-spacing: 0.05em;
  opacity: 0;
  transform: translateY(20px);
}

.thin-rule {
  width: 28px;
  height: 1px;
  background: var(--gold-line);
  margin: 48px 0;
  opacity: 0;
  transform: scaleX(0);
  transform-origin: left;
}

/* DEF + FORMULA */
.def-block {
  border-left: 1px solid var(--gold-line);
  padding-left: 24px;
  margin: 40px 0;
  opacity: 0;
  transform: translateY(16px);
}

.def-text {
  font-weight: 300;
  font-size: clamp(14px, 1.4vw, 16px);
  line-height: 2.2;
  letter-spacing: 0.05em;
  color: var(--fg);
}

.formula-block {
  text-align: center;
  margin: 64px 0;
  opacity: 0;
  transform: translateY(20px);
}

.formula-main {
  font-family: var(--display);
  font-size: clamp(28px, 4.5vw, 48px);
  font-weight: 300;
  font-style: italic;
  color: var(--gold);
  letter-spacing: 0.06em;
}

.formula-note {
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--muted);
  margin-top: 14px;
}

/* THEORY */
.theory-items {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--gold-line);
  margin: 48px 0;
}

.theory-item {
  background: rgba(252, 251, 248, 0.6);
  padding: 40px 20px;
  opacity: 0;
  transform: translateY(16px);
}

.theory-item-label {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 14px;
}

.theory-item-title {
  font-weight: 300;
  font-size: 17px;
  letter-spacing: 0.08em;
  margin-bottom: 14px;
}

.theory-item-desc {
  font-weight: 300;
  font-size: 14px;
  line-height: 2.2;
  color: var(--dim);
}

/* PILLARS */
.pillars {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--gold-line);
  margin: 56px 0;
}

.pillar {
  background: var(--bg);
  padding: 44px 24px;
  opacity: 0;
  transform: translateY(20px);
  transition: background 0.3s;
}

.pillar:hover {
  background: var(--gold-faint);
}

.pillar-sym {
  font-family: var(--display);
  font-size: 26px;
  font-weight: 300;
  color: var(--gold);
  margin-bottom: 18px;
}

.pillar-en {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--dim);
  margin-bottom: 12px;
}

.pillar-jp {
  font-weight: 300;
  font-size: 16px;
  letter-spacing: 0.1em;
  margin-bottom: 14px;
}

.pillar-desc {
  font-weight: 300;
  font-size: 14px;
  line-height: 2;
  color: var(--dim);
}

/* NODES DETAIL */
.nodes-detail {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
  margin: 48px 0;
}

.node-detail {
  border: 1px solid var(--gold-line);
  padding: 44px 36px;
  opacity: 0;
  transform: translateY(16px);
  transition: background 0.3s;
  background: var(--bg);
}

.node-detail:hover {
  background: var(--gold-faint);
}

.node-detail-header {
  display: flex;
  flex-direction: column;
  gap: 4px;
  margin-bottom: 20px;
}

.node-detail-id {
  font-family: var(--display);
  font-size: 16px;
  letter-spacing: 0.25em;
  color: var(--fg);
  font-weight: 500;
}

.node-detail-location {
  font-family: var(--display);
  font-size: 17px;
  letter-spacing: 0.12em;
  color: var(--fg);
  font-weight: 400;
}

.node-detail-coords {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  font-family: var(--display);
  font-size: 14px;
  letter-spacing: 0.06em;
  color: var(--fg);
  opacity: 0.5;
  margin-bottom: 24px;
  padding-bottom: 20px;
  border-bottom: 1px solid var(--gold-line);
}

.node-detail-name {
  font-weight: 400;
  font-size: clamp(14.6px, 1.68vw, 20.2px);
  letter-spacing: 0.14em;
  color: var(--fg);
  margin-bottom: 20px;
}

.node-detail-desc {
  font-weight: 300;
  font-size: 15px;
  line-height: 2.2;
  color: var(--dim);
}

/* TINT */
.tint {
  background: var(--gold-faint);
}

/* NØDiE SECTION */
#nodie .section-title {
  font-size: clamp(19.2px, 3.2vw, 33.6px);
}

.nodie-statement {
  font-weight: 200;
  font-size: clamp(18px, 2.4vw, 26px);
  letter-spacing: 0.12em;
  line-height: 2;
  color: var(--fg);
  text-align: center;
  margin: 48px 0 56px;
  opacity: 0;
  transform: translateY(20px);
}

.nodie-promise {
  text-align: center;
  margin: 56px 0 0;
  opacity: 0;
  transform: translateY(16px);
}

.nodie-promise-label {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.4em;
  color: var(--muted);
  margin-bottom: 18px;
}

.nodie-promise-text {
  font-weight: 200;
  font-size: clamp(16px, 2vw, 22px);
  letter-spacing: 0.15em;
  color: var(--fg);
}

/* ROADMAP */
.roadmap {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--gold-line);
  margin: 48px 0;
}

.rm-item {
  background: var(--bg);
  padding: 40px 28px;
  opacity: 0;
  transform: translateY(16px);
}

.rm-phase {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--gold);
  margin-bottom: 14px;
}

.rm-year {
  font-weight: 300;
  font-size: 20px;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.rm-list {
  font-weight: 300;
  font-size: 14px;
  line-height: 2.2;
  color: var(--dim);
}

/* CTA */
.cta-section {
  text-align: center;
  padding: 140px 24px;
}

.cta-mark {
  margin: 0 auto 40px;
  opacity: 0;
  transform: translateY(16px);
}

.cta-mark svg {
  width: 56px;
  height: 56px;
}

.cta-text {
  font-weight: 200;
  font-size: clamp(14px, 1.5vw, 16px);
  line-height: 2.6;
  color: var(--dim);
  letter-spacing: 0.1em;
  max-width: 440px;
  margin: 0 auto 48px;
  opacity: 0;
  transform: translateY(16px);
}

.cta-btn {
  display: inline-block;
  font-family: var(--display);
  font-size: 13px;
  letter-spacing: 0.3em;
  color: var(--gold);
  text-decoration: none;
  border: 1px solid var(--gold-line);
  padding: 14px 48px;
  transition: all 0.4s;
  opacity: 0;
  transform: translateY(16px);
}

.cta-btn:hover {
  background: var(--gold);
  color: var(--bg);
  border-color: var(--gold);
}

/* FOOTER BANNERS */
footer {
  padding: 0 0 48px;
  text-align: center;
}

.footer-banner-section {
  padding: 80px 24px;
  border-top: 1px solid var(--gold-line);
}

.footer-banner-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 960px;
  margin: 0 auto;
}

.footer-bcard {
  position: relative;
  display: block;
  text-decoration: none;
  border-radius: 6px;
  overflow: hidden;
  aspect-ratio: 5/3;
  transition: transform 0.4s, box-shadow 0.4s;
}

.footer-bcard:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(0, 0, 0, 0.15);
}

.footer-bcard-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.footer-bcard-content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
  padding: 20px 22px;
}

.footer-bcard-title {
  font-weight: 400;
  font-size: 16px;
  letter-spacing: 0.1em;
  color: #fff;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
  margin-bottom: 4px;
}

.footer-bcard-sub {
  font-family: var(--display);
  font-size: 11px;
  letter-spacing: 0.25em;
  color: rgba(255, 255, 255, 0.7);
  text-shadow: 0 1px 4px rgba(0, 0, 0, 0.3);
}

.footer-bcard-arrow {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s;
}

.footer-bcard:hover .footer-bcard-arrow {
  background: rgba(255, 255, 255, 0.3);
}

.footer-bcard-arrow svg {
  width: 14px;
  height: 14px;
}

/* Banner 1: LINE — deep green */
.bcard-line .footer-bcard-bg {
  background: linear-gradient(135deg, #1a3a2a 0%, #06C755 50%, #0a4f2a 100%);
}

.bcard-line .footer-bcard-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 70% 30%, rgba(6, 199, 85, 0.3) 0%, transparent 60%);
}

.bcard-line .footer-bcard-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-size: 48px;
  opacity: 0.12;
  color: #fff;
  font-family: var(--display);
  letter-spacing: 0.1em;
}

/* Banner 2: PROJECT ï — dark charcoal + gold accent */
/* === 元の色（復元用） ===
.bcard-project .footer-bcard-bg {
  background: linear-gradient(135deg, #1a1a18 0%, #2a2722 40%, #3d3828 100%);
}
.bcard-project .footer-bcard-bg::after {
  background: radial-gradient(circle at 30% 40%, rgba(139, 122, 46, 0.2) 0%, transparent 50%);
}
.bcard-project .footer-bcard-icon {
  color: var(--gold);
}
=== 元の色ここまで === */

.bcard-project .footer-bcard-bg {
  background: linear-gradient(135deg, #3a3a3a 0%, #4a4a4a 40%, #555 100%);
}

.bcard-project .footer-bcard-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 30% 40%, rgba(150, 150, 150, 0.15) 0%, transparent 50%);
}

.bcard-project .footer-bcard-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-family: var(--display);
  font-size: 56px;
  font-style: italic;
  opacity: 0.08;
  color: #888;
}

/* グレーアウト共通スタイル */
.bcard-disabled {
  pointer-events: none;
  opacity: 0.5;
  filter: grayscale(100%);
}

.bcard-disabled:hover {
  transform: none;
  box-shadow: none;
}

/* Banner 3: EVENT — warm dark */
.bcard-event .footer-bcard-bg {
  background: linear-gradient(135deg, #1a1520 0%, #2d1f3d 50%, #1a1520 100%);
}

.bcard-event .footer-bcard-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 60% 30%, rgba(180, 140, 255, 0.15) 0%, transparent 50%);
}

.bcard-event .footer-bcard-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-size: 44px;
  opacity: 0.1;
  color: #fff;
}

/* Banner 4: HOST — gold rich */
.bcard-host .footer-bcard-bg {
  background: linear-gradient(135deg, #2a2510 0%, #8B7A2E 50%, #2a2510 100%);
}

.bcard-host .footer-bcard-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 40% 50%, rgba(255, 255, 255, 0.1) 0%, transparent 50%);
}

.bcard-host .footer-bcard-icon {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -55%);
  font-size: 44px;
  opacity: 0.12;
  color: #fff;
}

.footer-bottom {
  padding: 36px 24px;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 32px;
  margin-bottom: 28px;
  flex-wrap: wrap;
}

.footer-links a {
  font-family: var(--display);
  font-size: 12px;
  letter-spacing: 0.25em;
  color: var(--muted);
  text-decoration: none;
  transition: color 0.3s;
}

.footer-links a:hover {
  color: var(--gold);
}

.footer-copy {
  font-family: var(--display);
  font-size: 12px;
  color: var(--muted);
  letter-spacing: 0.15em;
}

/* ANIMATIONS */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes scrollPulse {

  0%,
  100% {
    opacity: 0.2;
  }

  50% {
    opacity: 0.6;
  }
}

.anim {
  opacity: 1 !important;
  transform: translateY(0) scaleX(1) !important;
  transition: opacity 0.9s ease-out, transform 0.9s ease-out;
}

/* 共通：スマホのみ表示する改行 */
br.sp-show {
  display: none;
}

/* RESPONSIVE */
@media (max-width:768px) {
  nav {
    padding: 16px 20px;
  }

  .nav-logo svg {
    width: 28px;
    height: 28px;
  }

  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    display: flex;
    flex-direction: column;
    gap: 0;
    background: rgba(252, 251, 248, 0.96);
    backdrop-filter: blur(12px);
    border-top: 1px solid var(--gold-line);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transform: translateY(-8px);
    transition: max-height 0.35s ease, opacity 0.25s ease, transform 0.25s ease;
  }

  nav.nav-open .nav-links {
    max-height: 420px;
    opacity: 1;
    transform: translateY(0);
  }

  .nav-links a {
    display: block;
    font-size: 12px;
    padding: 14px 20px;
    border-bottom: 1px solid var(--gold-line);
  }

  .nav-links a:last-child {
    border-bottom: none;
  }

  nav.nav-open .nav-toggle-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
  }

  nav.nav-open .nav-toggle-bar:nth-child(2) {
    opacity: 0;
  }

  nav.nav-open .nav-toggle-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
  }

  .nav-logo-text {
    font-size: 12px;
  }

  section {
    padding: 80px 20px;
  }

  .hero-title {
    font-size: 22px;
    letter-spacing: 0.12em;
  }

  .hero-en {
    font-size: 12px;
  }

  .section-label {
    font-size: 13px;
  }

  .section-title {
    font-size: 22px;
  }

  #nodie .section-title {
    font-size: 18px;
  }

  .section-body {
    font-size: 15px;
  }

  .def-text {
    font-size: 15px;
  }

  .formula-note {
    font-size: 14px;
  }

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

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

  .nodes-detail {
    grid-template-columns: 1fr;
  }

  .footer-banners {
    grid-template-columns: 1fr 1fr;
  }

  .footer-banner-grid {
    grid-template-columns: 1fr 1fr;
    gap: 16px;
  }

  .theory-items {
    grid-template-columns: 1fr;
  }

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

  .nodie-statement {
    font-size: 18px;
  }

  /* スマホ改行修正：個別指定 */
  br.sp-hide {
    display: none !important;
  }

  br.sp-show {
    display: inline !important;
  }

  /* ===== スマホ改行修正 ===== */

  /* 手段A：PC用 <br> をスマホで非表示にする */
  .section-body br,
  .cta-text br {
    display: none;
    /* スマホ改行修正 */
  }

  /* 段落間の空行（<br><br>）は維持する */
  .section-body br+br {
    display: inline;
    /* スマホ改行修正 */
  }

  /* 手段B：スマホでのパディング縮小 */
  .node-detail {
    padding: 32px 20px;
    /* スマホ改行修正 */
  }

  .node-detail-name {
    font-size: 19.2px;
  }

  .def-block {
    padding-left: 16px;
    /* スマホ改行修正 */
  }

  /* OLC部分のスマホ改行修正 */
  .coord-olc {
    width: 100%;
    /* スマホ改行修正 */
  }

}