/* Creative YOLO 公式サイト — 「夜に、光が集まる。」（Brand Book §2 / Design System 準拠）
   モバイル起点（〜599px）で設計し、960px〜をdesktopとする */

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
[hidden] { display: none !important; }

body {
  margin: 0;
  background: var(--yolo-night);
  color: var(--yolo-paper);
  font-family: "Noto Sans JP", sans-serif;
  font-size: var(--fs-body);
  line-height: 1.9;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: "Shippori Mincho B1", serif;
  font-weight: 600;
  line-height: 1.5;
  margin: 0;
}

a { color: inherit; }

.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0 0 0 0); white-space: nowrap; border: 0;
}

.sp-only { display: inline; }
@media (min-width: 600px) { .sp-only { display: none; } }
.nowrap { white-space: nowrap; }

/* ── skip link ── */
.skip-link {
  position: fixed; top: -48px; left: var(--sp-4);
  background: var(--yolo-light); color: #ffffff;
  padding: var(--sp-2) var(--sp-4); border-radius: var(--rad-s);
  z-index: 100; transition: top var(--dur-fast) var(--ease-out);
}
.skip-link:focus { top: var(--sp-4); }

/* ── header ── */
.site-header {
  position: fixed; top: 0; left: 0; right: 0; z-index: 50;
  display: flex; align-items: center; justify-content: space-between;
  padding: var(--sp-4) var(--sp-6);
  background: linear-gradient(rgba(16,16,20,.92), rgba(16,16,20,.72) 70%, transparent);
}
.brand { display: flex; align-items: center; gap: var(--sp-3); text-decoration: none; }
.brand-mark {
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--yolo-light);
}
.brand-name {
  font-family: "Josefin Sans", sans-serif; font-weight: 600;
  letter-spacing: .12em; font-size: var(--fs-small);
}
.desktop-nav { display: none; }
@media (min-width: 960px) {
  .desktop-nav { display: flex; gap: var(--sp-6); align-items: center; }
  .desktop-nav a {
    text-decoration: none; font-size: var(--fs-small);
    color: var(--ink-2); transition: color var(--dur-fast) var(--ease-out);
  }
  .desktop-nav a:hover, .desktop-nav a:focus-visible { color: var(--yolo-paper); }
  .desktop-nav .nav-join {
    color: #ffffff; background: var(--yolo-light);
    padding: var(--sp-2) var(--sp-6); border-radius: var(--rad-pill);
    font-weight: 500;
  }
  .desktop-nav .nav-join:hover, .desktop-nav .nav-join:focus-visible { color: #ffffff; opacity: .9; }
  .menu-button { display: none !important; }
}

.menu-button {
  display: inline-flex; flex-direction: column; gap: 6px;
  min-width: 44px; min-height: 44px; align-items: center; justify-content: center;
  background: none; border: 0; cursor: pointer; padding: var(--sp-2);
}
.menu-button span:not(.sr-only) {
  display: block; width: 22px; height: 1.5px;
  background: var(--yolo-paper); transition: transform var(--dur-fast) var(--ease-out);
}
.menu-button[aria-expanded="true"] span:not(.sr-only):first-child { transform: translateY(4px) rotate(45deg); }
.menu-button[aria-expanded="true"] span:not(.sr-only):last-child { transform: translateY(-3.5px) rotate(-45deg); }

.mobile-nav {
  position: fixed; inset: 0; z-index: 40;
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: var(--sp-8); background: rgba(16,16,20,.97);
  opacity: 0; pointer-events: none; transition: opacity var(--dur-base) var(--ease-out);
}
.mobile-nav.open { opacity: 1; pointer-events: auto; }
.mobile-nav a {
  text-decoration: none; font-family: "Shippori Mincho B1", serif;
  font-size: 1.25rem;
}

/* ── buttons（Design System §2） ── */
.button {
  display: inline-flex; align-items: center; justify-content: center;
  min-height: 44px; padding: var(--sp-3) var(--sp-8);
  border-radius: var(--rad-pill); text-decoration: none;
  font-weight: 500; font-size: var(--fs-body);
  transition: opacity var(--dur-fast) var(--ease-out), transform var(--dur-fast) var(--ease-out);
}
.button:hover, .button:focus-visible { opacity: .88; transform: translateY(-1px); }
.button-primary { background: var(--yolo-light); color: #ffffff; }
.button-secondary { border: 1px solid currentColor; color: var(--yolo-paper); }
.button-large { padding: var(--sp-4) var(--sp-12); font-size: 1.05rem; }
.text-link { color: var(--yolo-light); text-decoration: none; }
.text-link:hover, .text-link:focus-visible { text-decoration: underline; }

/* ── hero ── */
.hero {
  position: relative; min-height: 100svh;
  display: flex; align-items: center; justify-content: center;
  text-align: center; overflow: hidden;
  padding: var(--sp-24) var(--sp-6) var(--sp-16);
}
.hero-glow {
  position: absolute; inset: 0;
  background:
    radial-gradient(ellipse 90% 60% at 50% 110%, rgba(192,67,44,.12), transparent 75%);
}
.hero-grain {
  position: absolute; inset: 0; opacity: .5;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='120' height='120'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='.9' numOctaves='2'/%3E%3CfeColorMatrix values='0 0 0 0 1 0 0 0 0 1 0 0 0 0 1 0 0 0 .03 0'/%3E%3C/filter%3E%3Crect width='120' height='120' filter='url(%23n)'/%3E%3C/svg%3E");
}
.hero-inner { position: relative; max-width: 720px; }
.hero-eyebrow {
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .35em; color: var(--yolo-light); margin: 0 0 var(--sp-6);
}
.hero h1 { font-size: var(--fs-hero); letter-spacing: .04em; }
.hero-lead { color: var(--ink-2); margin: var(--sp-6) 0 var(--sp-8); }
.hero-cta { display: flex; flex-direction: column; align-items: center; gap: var(--sp-4); }
@media (min-width: 600px) { .hero-cta { flex-direction: row; justify-content: center; gap: var(--sp-8); } }
.hero-sub-link { color: var(--ink-2); text-decoration: none; font-size: var(--fs-small); }
.hero-sub-link:hover, .hero-sub-link:focus-visible { color: var(--yolo-paper); }
.scroll-cue {
  position: absolute; bottom: var(--sp-6); left: 50%; transform: translateX(-50%);
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .3em; color: var(--ink-2); text-decoration: none;
}

/* ── sections ── */
.section { padding: var(--sp-24) var(--sp-6); position: relative; }
.section-alt { background: #15151b; }
.section-inner { max-width: 1120px; margin: 0 auto; }
.section-inner.narrow { max-width: 720px; }
.kicker {
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .35em; text-transform: uppercase;
  color: var(--yolo-light); margin: 0 0 var(--sp-4);
}
.section h2 { font-size: var(--fs-h2); margin-bottom: var(--sp-8); }
.prose p { margin: 0 0 var(--sp-6); color: var(--ink-1); }
.prose-strong strong { color: var(--yolo-light); font-weight: 600; }
.light-word {
  color: var(--yolo-light);
}
.section-cta { margin-top: var(--sp-8); }

/* ── projects ── */
.project-grid {
  display: grid; gap: var(--sp-6); margin-top: var(--sp-8);
  grid-template-columns: 1fr;
}
@media (min-width: 600px) { .project-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 960px) { .project-grid { grid-template-columns: repeat(3, 1fr); } }
.project-card {
  display: flex; flex-direction: column; gap: var(--sp-3);
  padding: var(--sp-8) var(--sp-6);
  background: var(--yolo-white);
  border: 1px solid var(--rule);
  border-radius: var(--rad-m); text-decoration: none;
  transition: border-color var(--dur-fast) var(--ease-out), background var(--dur-fast) var(--ease-out);
}
.project-card:hover, .project-card:focus-visible {
  border-color: rgba(17,17,17,.28); background: var(--yolo-white);
}
.card-label {
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .25em; color: var(--yolo-light); margin: 0;
}
.project-card h3 { font-size: 1.15rem; }
.project-card p { margin: 0; font-size: var(--fs-small); color: var(--ink-2); line-height: 1.9; }
.card-link { margin-top: auto; padding-top: var(--sp-3); font-size: var(--fs-small); color: var(--yolo-light); }

/* ── community gallery（写真差し替え待ちのダミー：ダミーであることを隠さない） ── */
.gallery {
  display: grid; gap: var(--sp-4); margin-top: var(--sp-12);
  grid-template-columns: repeat(2, 1fr);
}
@media (min-width: 600px) { .gallery { grid-template-columns: repeat(3, 1fr); } }
.gallery-item {
  margin: 0; aspect-ratio: 4 / 3; border-radius: var(--rad-s);
  display: flex; align-items: flex-end; overflow: hidden;
}
.gallery-item.dummy {
  background:
    linear-gradient(160deg, #121212, #0b0b0b);
  border: 1px dashed var(--rule);
}
.gallery-item.dummy figcaption {
  width: 100%; padding: var(--sp-2) var(--sp-3);
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .2em; color: var(--ink-2);
}

/* ── news ── */
.news-list { list-style: none; margin: 0; padding: 0; }
.news-list li {
  display: flex; gap: var(--sp-6); align-items: baseline;
  padding: var(--sp-4) 0;
  border-bottom: 1px solid var(--rule);
}
.news-list time {
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-small);
  color: var(--yolo-light); flex-shrink: 0; letter-spacing: .08em;
}

/* ── join ── */
.join { overflow: hidden; text-align: center; }
.join-glow {
  position: absolute; inset: 0;
}
.join .section-inner { position: relative; }
.join-steps {
  list-style: none; margin: 0 auto var(--sp-8); padding: 0;
  max-width: 560px; text-align: left;
}
.join-steps li {
  display: flex; gap: var(--sp-4); align-items: baseline;
  padding: var(--sp-4) 0; border-bottom: 1px solid var(--rule);
}
.step-num {
  font-family: "Josefin Sans", sans-serif; font-weight: 600;
  color: var(--yolo-light); flex-shrink: 0; font-size: 1.2rem;
}
.join-note { color: var(--ink-2); font-size: var(--fs-small); margin-bottom: var(--sp-8); }
.join-cta { margin: 0 0 var(--sp-8); }
.join-biz { font-size: var(--fs-small); color: var(--ink-2); }
.join-biz a { color: var(--yolo-light); }

/* ── footer（共通フッター：01-ECOSYSTEM-IA §3） ── */
.site-footer {
  border-top: 1px solid var(--rule);
  padding: var(--sp-16) var(--sp-6);
}
.footer-inner { max-width: 1120px; margin: 0 auto; text-align: center; }
.footer-brand { font-family: "Shippori Mincho B1", serif; font-size: 1.05rem; margin: 0 0 var(--sp-2); }
.footer-tagline { color: var(--ink-2); font-size: var(--fs-small); margin: 0 0 var(--sp-8); }
.footer-links {
  display: flex; flex-wrap: wrap; justify-content: center;
  gap: var(--sp-4) var(--sp-6); margin-bottom: var(--sp-6);
}
.footer-links a {
  font-size: var(--fs-small); color: var(--ink-2); text-decoration: none;
}
.footer-links a:hover, .footer-links a:focus-visible { color: var(--yolo-light); }
.footer-copy { font-size: var(--fs-label); color: var(--ink-2); margin: var(--sp-8) 0 0; }

/* ── reveal motion（§3：フェード＋上方向。reduced-motionで無効）
     JS無効環境でも内容が見えるよう、html.js の下でのみ初期非表示にする ── */
html.js [data-reveal] {
  opacity: 0; transform: translateY(12px);
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
}
html.js [data-reveal].is-visible { opacity: 1; transform: none; }
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  html.js [data-reveal] { opacity: 1; transform: none; transition: none; }
  .button:hover { transform: none; }
}

/* ── focus ── */
:focus-visible { outline: 2px solid var(--yolo-light); outline-offset: 3px; }

/* ═══ ワクワク改修（YOLOとは？先頭化・RPG世界観・写真仮枠） ═══ */

/* ── hero 読み込み演出（段階フェード。reduced-motionで無効） ── */
html.js .hero [data-stage] {
  opacity: 0; transform: translateY(14px);
  animation: stage-in var(--dur-slow) var(--ease-out) forwards;
}
html.js .hero [data-stage="1"] { animation-delay: 120ms; }
html.js .hero [data-stage="2"] { animation-delay: 320ms; }
html.js .hero [data-stage="3"] { animation-delay: 640ms; }
html.js .hero [data-stage="4"] { animation-delay: 900ms; }
@keyframes stage-in { to { opacity: 1; transform: none; } }

/* ── 光の粒子 ── */
.hero-particles { position: absolute; inset: 0; width: 100%; height: 100%; }

/* ── hero 写真仮枠（実写真が来たら background-image を設定） ── */
.hero-photo {
  position: absolute; margin: 0; z-index: 1;
  border: 1px solid var(--rule);
  border-radius: var(--rad-s);
  background:
    linear-gradient(155deg, #1d1d25, #131318);
  box-shadow: 0 12px 40px rgba(0,0,0,.5);
  display: flex; align-items: flex-end;
  background-size: cover; background-position: center;
}
.hero-photo figcaption {
  width: 100%; padding: var(--sp-2) var(--sp-3);
  font-family: "Josefin Sans", sans-serif; font-size: 10px;
  letter-spacing: .22em; color: var(--ink-2);
}
.hero-photo-a { width: 180px; aspect-ratio: 3/4; left: 4%; bottom: 16%; transform: rotate(-5deg); }
.hero-photo-b { width: 200px; aspect-ratio: 4/3; right: 4%; top: 20%; transform: rotate(4deg); }
@media (max-width: 959px) { .hero-photo { display: none; } }
html.js .hero-photo { opacity: 0; animation: stage-in var(--dur-slow) var(--ease-out) 1100ms forwards; }

/* ── ことばのレール ── */
.word-rail {
  overflow: hidden; border-top: 1px solid var(--rule); border-bottom: 1px solid var(--rule);
  background: var(--yolo-white); padding: var(--sp-3) 0;
}
.word-rail-track {
  display: flex; gap: var(--sp-8); width: max-content;
  font-family: "Shippori Mincho B1", serif; font-size: 1rem; letter-spacing: .2em;
  color: var(--ink-2); white-space: nowrap;
  animation: rail-scroll 28s linear infinite;
}
.word-rail-track i { font-style: normal; color: var(--yolo-light); }
@keyframes rail-scroll { to { transform: translateX(-50%); } }
@media (prefers-reduced-motion: reduce) { .word-rail-track { animation: none; } }

/* ── YOLOとは？ ── */
.yolo-meaning { text-align: center; overflow: hidden; }
.yolo-meaning h2 { margin-bottom: var(--sp-12); }
.acronym {
  display: flex; justify-content: center; gap: clamp(12px, 4vw, 48px);
  margin-bottom: var(--sp-12);
}
.acronym-letter b {
  display: block;
  font-family: "Josefin Sans", sans-serif; font-weight: 600;
  font-size: clamp(3rem, 11vw, 7rem); line-height: 1;
  color: var(--yolo-light);
}
.acronym-letter span {
  display: block; margin-top: var(--sp-2);
  font-family: "Josefin Sans", sans-serif; font-size: var(--fs-label);
  letter-spacing: .3em; color: var(--ink-2); text-transform: uppercase;
}
/* 1文字ずつ順に灯る */
html.js .acronym-letter { transition-delay: 0ms; }
html.js .acronym-letter:nth-child(2) { transition-delay: 140ms; }
html.js .acronym-letter:nth-child(3) { transition-delay: 280ms; }
html.js .acronym-letter:nth-child(4) { transition-delay: 420ms; }
.yolo-line {
  font-family: "Shippori Mincho B1", serif; font-size: clamp(1.2rem, 3vw, 1.6rem);
  margin: 0 0 var(--sp-6);
}
.light-word-plain { color: var(--yolo-light); }

.rpg-block { margin-top: var(--sp-12); }
.rpg-lead { color: var(--ink-2); margin: 0 0 var(--sp-4); }
.rpg-declare {
  font-family: "Shippori Mincho B1", serif; font-weight: 600;
  font-size: clamp(1.5rem, 4.5vw, 2.4rem); line-height: 1.6; margin: 0 0 var(--sp-8);
}
.rpg-declare em {
  font-style: normal; color: var(--yolo-light);
  font-family: "Josefin Sans", sans-serif; letter-spacing: .06em;
}
.rpg-roles {
  list-style: none; margin: 0 auto var(--sp-8); padding: 0;
  display: flex; flex-wrap: wrap; justify-content: center; gap: var(--sp-3);
}
.rpg-roles li {
  border: 1px solid var(--rule); border-radius: var(--rad-pill);
  padding: var(--sp-2) var(--sp-6); font-size: var(--fs-small);
  background: var(--yolo-white);
}
.rpg-roles .rpg-key { color: var(--ink-2); margin-right: var(--sp-2); }
.rpg-roles strong { color: var(--yolo-light); font-weight: 600; }
.rpg-note { color: var(--ink-1); margin: 0; }

/* ── 写真ストリップ（仮枠） ── */
.photo-strip {
  display: flex; justify-content: center; gap: var(--sp-6);
  margin-top: var(--sp-16); flex-wrap: wrap;
}
.photo-frame {
  margin: 0; width: min(260px, 80vw); aspect-ratio: 4/3;
  border: 1px solid var(--rule); border-radius: var(--rad-s);
  background:
    linear-gradient(160deg, #121212, #0b0b0b);
  box-shadow: 0 10px 32px rgba(0,0,0,.45);
  display: flex; align-items: flex-end;
  background-size: cover; background-position: center;
}
.photo-frame figcaption {
  width: 100%; padding: var(--sp-2) var(--sp-3);
  font-family: "Josefin Sans", sans-serif; font-size: 10px;
  letter-spacing: .22em; color: var(--ink-2);
}
.photo-frame.tilt-l { transform: rotate(-2.5deg); }
.photo-frame.tilt-r { transform: rotate(2.5deg); }

/* ── プロジェクトカードの写真スロット ── */
.card-photo {
  margin: calc(var(--sp-8) * -1) calc(var(--sp-6) * -1) 0;
  aspect-ratio: 16/9;
  border-radius: var(--rad-m) var(--rad-m) 0 0;
  background:
    linear-gradient(160deg, #1c1c23, #131317);
  border-bottom: 1px solid var(--rule);
  display: flex; align-items: flex-end;
  background-size: cover; background-position: center;
  margin-bottom: var(--sp-4);
}
.card-photo figcaption {
  width: 100%; padding: var(--sp-2) var(--sp-3);
  font-family: "Josefin Sans", sans-serif; font-size: 10px;
  letter-spacing: .22em; color: var(--ink-2);
}
@media (prefers-reduced-motion: reduce) {
  html.js .hero [data-stage], html.js .hero-photo { animation: none; opacity: 1; transform: none; }
}