/* ─────────────────────────────────────
   TOKEN SYSTEM
   板：#1A2A1C  チョーク：#F2EDD6
   橙：#E8500A  酒金：#C89408  碧：#3A7A50
───────────────────────────────────── */
:root{
  --kuro:#0F1A10;
  --ban:#1A2A1C;
  --ban-mid:#243626;
  --ban-light:#2E4430;
  --chalk:#F2EDD6;
  --chalk-dim:rgba(242,237,214,0.6);
  --chalk-faint:rgba(242,237,214,0.18);
  --daidai:#E8500A;
  --daidai-light:#FF6B20;
  --kin:#C89408;
  --kin-light:#E0AA10;
  --midori:#3A7A50;
  --midori-light:#4A9860;
  --text-chalk:var(--chalk);
  --text-dim:rgba(242,237,214,0.55);
  --r:4px;
}
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:'Noto Sans JP',sans-serif;
  background:var(--ban);
  color:var(--chalk);
  overflow-x:hidden;
  line-height:1.7;
  /* 黒板テクスチャ：細かいノイズ風グラデーション */
  background-image:
    repeating-linear-gradient(
      0deg,
      rgba(255,255,255,0.015) 0px, rgba(255,255,255,0.015) 1px,
      transparent 1px, transparent 40px
    ),
    repeating-linear-gradient(
      90deg,
      rgba(255,255,255,0.01) 0px, rgba(255,255,255,0.01) 1px,
      transparent 1px, transparent 40px
    );
}

/* ── NAV ── */
nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  background:rgba(10,18,11,0.96);
  backdrop-filter:blur(8px);
  border-bottom:2px dashed rgba(242,237,214,0.2);
}
.nav-inner{
  max-width:1140px;margin:0 auto;padding:0 1.5rem;
  display:flex;align-items:center;justify-content:space-between;
  height:60px;gap:1rem;
}
.nav-logo{
  display:flex;align-items:center;gap:0.7rem;
  text-decoration:none;
}
.nav-logo-mark{
/*
  width:34px;height:34px;flex-shrink:0;
  background:var(--daidai);
  border-radius:50%;
  display:flex;align-items:center;justify-content:center;
  font-size:1.1rem;line-height:1;
*/
}
.nav-logo-mark img {
	width:34px;
	height:auto;
}
.nav-logo-text{
  font-family:'Kaisei Decol',serif;
  font-size:0.88rem;font-weight:700;
  color:var(--chalk);line-height:1.25;
}
.nav-logo-text small{
  display:block;
  font-family:'DotGothic16',monospace;
  font-size:0.6rem;color:var(--chalk-dim);letter-spacing:0.06em;
}
.nav-links{display:flex;gap:1.4rem;list-style:none;align-items:center}
.nav-links a{
  font-size:0.8rem;font-weight:500;
  color:var(--chalk-dim);text-decoration:none;
  letter-spacing:0.06em;transition:color 0.2s;
  font-family:'DotGothic16',monospace;
}
.nav-links a:hover{color:var(--daidai-light)}
.nav-btn{
  background:var(--daidai);color:var(--chalk) !important;
  padding:0.42rem 1.1rem;border-radius:var(--r);
  font-weight:700 !important;
  font-family:'Kaisei Decol',serif !important;
  font-size:0.82rem !important;
  transition:background 0.2s !important;
  border:1.5px solid var(--daidai-light);
  letter-spacing:0.04em;
}
.nav-btn:hover{background:var(--daidai-light) !important}
.hamburger{
  display:none;flex-direction:column;gap:5px;
  cursor:pointer;background:none;border:none;padding:4px;flex-shrink:0;
}
.hamburger span{display:block;width:24px;height:2px;background:var(--chalk-dim);border-radius:1px}

/* ── HERO ── */
.hero{
  min-height:100svh;
  position:relative;overflow:hidden;
  display:flex;flex-direction:column;
  align-items:center;justify-content:center;
  padding:6rem 1.5rem 4rem;
  text-align:center;
}
/* メインビジュアル背景 */
.hero-bg{
  position:absolute;inset:0;z-index:0;
}
.hero-bg img{
  width:100%;height:100%;
  object-fit:cover;object-position:center;
  opacity:0.28;
  filter:saturate(0.5) contrast(1.1);
}
.hero-bg-overlay{
  position:absolute;inset:0;
  background:linear-gradient(
    180deg,
    rgba(10,18,11,0.45) 0%,
    rgba(15,26,16,0.6) 40%,
    rgba(10,18,11,0.92) 100%
  );
}

/* チョーク枠 装飾 */
.chalk-frame{
  position:absolute;inset:16px;z-index:1;pointer-events:none;
  border:2px dashed rgba(242,237,214,0.14);border-radius:2px;
}
.chalk-frame::before{
  content:'';position:absolute;inset:6px;
  border:1px solid rgba(242,237,214,0.07);
}

.hero-inner{position:relative;z-index:2;max-width:800px;width:100%}

/* タイトルバナー風 */
.hero-presents{
  font-family:'DotGothic16',monospace;
  font-size:0.8rem;letter-spacing:0.18em;
  color:var(--kin);margin-bottom:0.8rem;
  display:flex;align-items:center;justify-content:center;gap:0.8rem;
}
.hero-presents::before,.hero-presents::after{
  content:'';flex:1;max-width:60px;
  height:1px;background:var(--kin);opacity:0.5;
}

/* チョーク手書き風ロゴ */
.hero-logo-img{
  width:min(480px,88%);height:auto;
  display:block;margin:0 auto 1.2rem;
  filter:drop-shadow(0 0 20px rgba(232,80,10,0.25));
  animation:fadeInDown 0.7s ease both;
}
@keyframes fadeInDown{from{opacity:0;transform:translateY(-18px)}to{opacity:1;transform:translateY(0)}}

.hero-catch{
  font-family:'Kaisei Decol',serif;
  font-size:clamp(1.1rem,3vw,1.6rem);
  font-weight:700;color:var(--chalk);
  margin-bottom:1.5rem;line-height:1.5;
  letter-spacing:0.04em;
  text-shadow:0 1px 12px rgba(0,0,0,0.6);
  animation:fadeInDown 0.7s 0.15s ease both;
}

/* 大会日時チップ */
.hero-chips{
  display:flex;flex-wrap:wrap;justify-content:center;
  gap:0.6rem;margin-bottom:2rem;
  animation:fadeInDown 0.7s 0.25s ease both;
}
.hero-chip{
  display:inline-flex;align-items:center;gap:0.4rem;
  background:rgba(242,237,214,0.1);
  border:1.5px solid rgba(242,237,214,0.25);
  color:var(--chalk);
  font-family:'DotGothic16',monospace;
  font-size:0.8rem;padding:0.4rem 0.9rem;border-radius:var(--r);
  letter-spacing:0.06em;
}
.hero-chip-icon{font-size:1rem;line-height:1}
.hero-chip.hot{border-color:var(--daidai);color:var(--daidai-light);background:rgba(232,80,10,0.1)}

.hero-btns{
  display:flex;gap:0.8rem;flex-wrap:wrap;justify-content:center;
  animation:fadeInDown 0.7s 0.35s ease both;
}
.btn-daidai{
  background:var(--daidai);color:var(--chalk);
  font-family:'Kaisei Decol',serif;
  font-size:1.05rem;font-weight:700;
  padding:0.9rem 2.4rem;border-radius:var(--r);
  text-decoration:none;letter-spacing:0.06em;
  border:2px solid var(--daidai-light);
  transition:all 0.2s;display:inline-block;
  text-shadow:0 1px 3px rgba(0,0,0,0.3);
}
.btn-daidai:hover{background:var(--daidai-light);transform:translateY(-2px);box-shadow:0 8px 24px rgba(232,80,10,0.4)}
.btn-chalk{
  background:transparent;color:var(--chalk);
  font-family:'DotGothic16',monospace;
  font-size:0.88rem;
  padding:0.9rem 2rem;border-radius:var(--r);
  text-decoration:none;letter-spacing:0.08em;
  border:1.5px dashed rgba(242,237,214,0.35);
  transition:all 0.2s;display:inline-block;
}
.btn-chalk:hover{border-color:var(--chalk);background:rgba(242,237,214,0.06)}

/* スクロールヒント */
.scroll-hint{
  position:absolute;bottom:1.8rem;left:50%;transform:translateX(-50%);
  display:flex;flex-direction:column;align-items:center;gap:0.4rem;z-index:2;
  color:var(--chalk-dim);
  font-family:'DotGothic16',monospace;
  font-size:0.65rem;letter-spacing:0.12em;
  animation:bob 2.2s ease-in-out infinite;
}
@keyframes bob{0%,100%{transform:translateX(-50%) translateY(0)}50%{transform:translateX(-50%) translateY(7px)}}
.scroll-hint svg{width:16px;height:16px}

/* ── CHALK DIVIDER ── */
.chalk-divider{
  text-align:center;padding:1.2rem 0;
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;letter-spacing:0.2em;
  color:rgba(242,237,214,0.2);
  user-select:none;
}

/* ── SECTIONS ── */
.sec{padding:5rem 1.5rem;position:relative}
.sec-inner{max-width:1100px;margin:0 auto}

/* チョーク見出しスタイル */
.sec-label{
  font-family:'DotGothic16',monospace;
  font-size:0.7rem;letter-spacing:0.2em;
  color:var(--kin);
  margin-bottom:0.6rem;
  display:flex;align-items:center;gap:0.6rem;
  text-transform:uppercase;
}
.sec-label::after{content:'';flex:1;max-width:40px;height:1px;background:var(--kin);opacity:0.4}
.sec-heading{
  font-family:'Kaisei Decol',serif;
  font-size:clamp(1.8rem,4.5vw,3rem);
  font-weight:700;color:var(--chalk);
  line-height:1.15;margin-bottom:1rem;
  letter-spacing:0.02em;
}
.sec-lead{font-size:0.97rem;color:var(--chalk-dim);max-width:580px;line-height:1.88}

/* ── NEWS ── */
.news-list{
  margin-top:2rem;
  border:1.5px dashed rgba(242,237,214,0.18);
  border-radius:var(--r);overflow:hidden;
}
.news-list h2 {
	margin: 30px 0;
}

.news-detail {
	padding: 30px;
}

.news-item{
  display:flex;align-items:baseline;gap:1rem;flex-wrap:wrap;
  padding:0.88rem 1.3rem;
  border-bottom:1px dashed rgba(242,237,214,0.12);
  text-decoration:none;color:var(--chalk);
  transition:background 0.15s;
}
.news-item:last-child{border-bottom:none}
.news-item:hover{background:rgba(242,237,214,0.05)}
.news-date{
  font-family:'DotGothic16',monospace;
  font-size:0.76rem;color:var(--chalk-dim);
  flex-shrink:0;
}
.news-tag{
  font-family:'DotGothic16',monospace;
  font-size:0.65rem;font-weight:700;
  padding:0.15rem 0.55rem;border-radius:2px;flex-shrink:0;
  letter-spacing:0.06em;
}
.tag-done{background:rgba(58,122,80,0.3);color:#7acc94;border:1px solid rgba(74,152,96,0.4)}
.tag-info{background:rgba(200,148,8,0.25);color:var(--kin-light);border:1px solid rgba(200,148,8,0.35)}
.tag-vol{background:rgba(232,80,10,0.2);color:var(--daidai-light);border:1px solid rgba(232,80,10,0.3)}
.tag-result{background:#e8f0e8;color:#2a5a2a}
.tag-staff{background:#ede8f8;color:#4a2a88}
.tag-entry{background:#fff3d8;color:#885800}
.tag-info{background:#fde8ee;color:#c0304f}
.tag-report{background:#e8f5f1;color:#2a8068}
.tag-lookingfor{background:#fff0d8;color:#8a5800}
.tag-important { background: #fce8e8; color: #8a1a1a; }
.news-text{font-size:0.87rem;line-height:1.5}

/* ── CONCEPT BAND ── */
.concept-band{
  background:var(--daidai);
  padding:4rem 1.5rem;
  text-align:center;
  position:relative;overflow:hidden;
}
.concept-band::before{
  content:'';position:absolute;inset:0;
  background:
    repeating-linear-gradient(
      45deg,
      rgba(255,255,255,0.04) 0px, rgba(255,255,255,0.04) 1px,
      transparent 1px, transparent 14px
    );
}
.concept-band-inner{position:relative;z-index:1;max-width:800px;margin:0 auto}
.concept-band-label{
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;letter-spacing:0.2em;color:rgba(242,237,214,0.7);
  margin-bottom:1rem;
}
.concept-band-text{
  font-family:'Kaisei Decol',serif;
  font-size:clamp(1.6rem,4vw,2.6rem);
  font-weight:700;color:var(--chalk);
  line-height:1.3;margin-bottom:1.2rem;
}
.concept-band-sub{
  font-size:1rem;color:rgba(242,237,214,0.85);line-height:1.85;
}

/* ── RULES TICKER ── */
.rules-ticker{
  background:var(--kuro);
  padding:0.7rem 0;overflow:hidden;
  border-top:1.5px dashed rgba(242,237,214,0.15);
  border-bottom:1.5px dashed rgba(242,237,214,0.15);
}
.rules-ticker-track{
  display:flex;gap:0;
  white-space:nowrap;
  animation:ticker 28s linear infinite;
}
@keyframes ticker{from{transform:translateX(0)}to{transform:translateX(-50%)}}
.rules-ticker-item{
  display:inline-flex;align-items:center;gap:0.7rem;
  padding:0 2rem;
  font-family:'DotGothic16',monospace;
  font-size:0.82rem;color:var(--chalk-dim);
  letter-spacing:0.08em;flex-shrink:0;
}
.rules-ticker-item .tick-icon{font-size:1rem;flex-shrink:0}
.rules-ticker-item .tick-hot{color:var(--daidai-light)}

/* ── ABOUT ── */
.about-grid{
  display:grid;grid-template-columns:1fr 1fr;
  gap:3rem;align-items:center;margin-top:2.5rem;
}
.about-img-wrap{
  position:relative;
}
.about-img{
  border-radius:var(--r);overflow:hidden;
  border:2px dashed rgba(242,237,214,0.18);
}
.about-img img{width:100%;height:auto;display:block;opacity:0.92}
.about-img-label{
  position:absolute;bottom:-12px;right:-12px;
  background:var(--daidai);
  font-family:'Kaisei Decol',serif;
  font-size:0.82rem;font-weight:700;color:var(--chalk);
  padding:0.45rem 0.9rem;border-radius:var(--r);
  border:1.5px solid var(--daidai-light);
  white-space:nowrap;
}
.about-points{display:flex;flex-direction:column;gap:1.1rem}
.about-point{
  display:flex;gap:1rem;align-items:flex-start;
  padding:1.1rem 1.2rem;
  background:rgba(242,237,214,0.04);
  border:1.5px dashed rgba(242,237,214,0.14);
  border-radius:var(--r);
  transition:border-color 0.2s,background 0.2s;
}
.about-point:hover{border-color:var(--daidai);background:rgba(232,80,10,0.06)}
.about-point-icon{font-size:1.6rem;flex-shrink:0;line-height:1;margin-top:0.1rem}
.about-point-title{
  font-family:'Kaisei Decol',serif;
  font-size:0.97rem;font-weight:700;color:var(--chalk);
  margin-bottom:0.25rem;
}
.about-point-desc{font-size:0.83rem;color:var(--chalk-dim);line-height:1.7}

/* ── PRIZE BAND ── */
.prize-band{
  background:linear-gradient(135deg,#0C1A0D 0%,#1A2E1C 100%);
  padding:4rem 1.5rem;
  border-top:2px dashed rgba(200,148,8,0.3);
  border-bottom:2px dashed rgba(200,148,8,0.3);
}
.prize-inner{max-width:1100px;margin:0 auto}
.prize-grid{
  display:grid;grid-template-columns:repeat(3,1fr);
  gap:1rem;margin-top:2rem;
}
.prize-card{
  background:rgba(242,237,214,0.04);
  border:1.5px dashed rgba(200,148,8,0.3);
  border-radius:var(--r);
  padding:1.5rem;text-align:center;
  transition:border-color 0.2s,background 0.2s;
}
.prize-card:hover{border-color:var(--kin);background:rgba(200,148,8,0.08)}
.prize-rank{
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;letter-spacing:0.14em;color:var(--kin);
  margin-bottom:0.7rem;text-transform:uppercase;
}
.prize-icon{font-size:2.5rem;margin-bottom:0.7rem;line-height:1}
.prize-title{
  font-family:'Kaisei Decol',serif;
  font-size:1.05rem;font-weight:700;color:var(--chalk);
  line-height:1.35;
}
.prize-sub{font-size:0.78rem;color:var(--chalk-dim);margin-top:0.35rem;line-height:1.5}

/* 参加賞 */
.prize-special{
  margin-top:1.5rem;
  padding:1.5rem 2rem;
  background:rgba(200,148,8,0.1);
  border:2px solid rgba(200,148,8,0.4);
  border-radius:var(--r);
  display:flex;align-items:center;justify-content:space-between;
  gap:1.5rem;flex-wrap:wrap;
}
.prize-special-label{
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;letter-spacing:0.16em;color:var(--kin);
  margin-bottom:0.4rem;text-transform:uppercase;
}
.prize-special-name{
  font-family:'Kaisei Decol',serif;
  font-size:1.35rem;font-weight:700;color:var(--chalk);
}
.prize-special-sub{font-size:0.85rem;color:var(--chalk-dim);margin-top:0.25rem}
.prize-special-icon{font-size:3rem;flex-shrink:0}

/* ── CATEGORIES ── */
.cat-grid{
  display:grid;grid-template-columns:1fr 1fr;
  gap:1rem;margin-top:2rem;
}
.cat-card{
  background:rgba(242,237,214,0.04);
  border:1.5px dashed rgba(242,237,214,0.18);
  border-radius:var(--r);padding:1.6rem;
  position:relative;overflow:hidden;
  transition:border-color 0.2s,background 0.2s;
}
.cat-card:hover{border-color:var(--daidai);background:rgba(232,80,10,0.06)}
.cat-card-num{
  position:absolute;top:1rem;right:1.2rem;
  font-family:'Kaisei Decol',serif;
  font-size:3.5rem;font-weight:700;color:rgba(242,237,214,0.05);
  line-height:1;user-select:none;
}
.cat-badge{
  display:inline-block;
  font-family:'DotGothic16',monospace;
  font-size:0.65rem;letter-spacing:0.1em;
  padding:0.18rem 0.6rem;border-radius:2px;
  margin-bottom:0.8rem;
}
.badge-ind{background:rgba(232,80,10,0.25);color:var(--daidai-light);border:1px solid rgba(232,80,10,0.35)}
.badge-team{background:rgba(200,148,8,0.25);color:var(--kin-light);border:1px solid rgba(200,148,8,0.35)}
.cat-name{
  font-family:'Kaisei Decol',serif;
  font-size:1.25rem;font-weight:700;color:var(--chalk);
  margin-bottom:0.3rem;line-height:1.3;
}
.cat-sub{font-size:0.8rem;color:var(--chalk-dim);margin-bottom:1rem;line-height:1.5}
.cat-price-row{display:flex;align-items:baseline;gap:0.4rem;margin-bottom:0.4rem}
.cat-price{
  font-family:'Kaisei Decol',serif;
  font-size:2rem;font-weight:700;color:var(--chalk);
}
.cat-price-unit{font-size:0.82rem;color:var(--chalk-dim)}
.cat-cap{
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;color:var(--chalk-dim);
  margin-top:0.6rem;padding-top:0.6rem;
  border-top:1px dashed rgba(242,237,214,0.15);
}

/* ENTRY CTA */
.entry-cta{
  margin-top:2rem;
  background:rgba(232,80,10,0.1);
  border:2px dashed var(--daidai);
  border-radius:var(--r);
  padding:1.8rem;text-align:center;
}
.entry-cta-title{
  font-family:'Kaisei Decol',serif;
  font-size:1.1rem;font-weight:700;color:var(--chalk);
  margin-bottom:0.5rem;
}
.entry-cta-sub{
  font-family:'DotGothic16',monospace;
  font-size:0.78rem;color:var(--chalk-dim);
  margin-bottom:1.2rem;line-height:1.7;
}

/* ── COURSE ── */
.course-sec{background:var(--ban-mid)}
.course-grid{
  display:grid;grid-template-columns:1fr 1fr;
  gap:2.5rem;align-items:start;margin-top:2rem;
}
.course-map{
  border:1.5px dashed rgba(242,237,214,0.2);
  border-radius:var(--r);overflow:hidden;
}
.course-map img{width:100%;height:auto;display:block;opacity:0.95}
.course-steps{display:flex;flex-direction:column;gap:0.8rem}
.course-step{
  display:flex;gap:0.9rem;align-items:flex-start;
  padding:0.9rem 1rem;
  background:rgba(242,237,214,0.03);
  border:1px dashed rgba(242,237,214,0.12);
  border-radius:var(--r);
}
.course-step-dot{
  width:26px;height:26px;min-width:26px;
  background:var(--daidai);
  border-radius:50%;
  font-family:'DotGothic16',monospace;
  font-size:0.7rem;font-weight:700;color:var(--chalk);
  display:flex;align-items:center;justify-content:center;
  margin-top:0.15rem;
}
.course-step-s{background:var(--midori)}
.course-step-g{background:var(--kin)}
.course-step-title{
  font-family:'Kaisei Decol',serif;
  font-size:0.9rem;font-weight:700;color:var(--chalk);
  margin-bottom:0.2rem;
}
.course-step-desc{font-size:0.8rem;color:var(--chalk-dim);line-height:1.6}

/* ── GALLERY ── */
.gallery-grid{
  display:grid;
  grid-template-columns:repeat(auto-fill,minmax(200px,1fr));
  gap:0.5rem;margin-top:2rem;
}
.gallery-item{aspect-ratio:4/3;overflow:hidden;border-radius:var(--r);position:relative}
.gallery-item img{
  width:100%;height:100%;object-fit:cover;display:block;
  transition:transform 0.4s,filter 0.3s;
  filter:saturate(0.85);
}
.gallery-item:hover img{transform:scale(1.07);filter:saturate(1.1)}

/* ── FAQ ── */
.faq-list{margin-top:2rem;max-width:760px;display:flex;flex-direction:column;gap:0.5rem}
details{
  border:1.5px dashed rgba(242,237,214,0.16);
  border-radius:var(--r);overflow:hidden;
}
details summary{
  padding:1rem 1.2rem;cursor:pointer;
  font-family:'Kaisei Decol',serif;
  font-weight:700;font-size:0.92rem;
  display:flex;justify-content:space-between;align-items:center;
  list-style:none;color:var(--chalk);transition:background 0.15s;gap:1rem;
}
details summary::-webkit-details-marker{display:none}
details summary:hover{background:rgba(242,237,214,0.05)}
details summary::after{
  content:'＋';
  font-family:'DotGothic16',monospace;
  font-size:1rem;font-weight:400;color:var(--daidai);
  flex-shrink:0;transition:transform 0.2s;
}
details[open] summary::after{transform:rotate(45deg)}
details[open] summary{background:rgba(242,237,214,0.04)}
.faq-answer{
  padding:0.8rem 1.2rem 1.1rem;
  font-size:0.87rem;color:var(--chalk-dim);
  line-height:1.8;
  border-top:1px dashed rgba(242,237,214,0.12);
}
.faq-answer a{color:var(--daidai-light)}

/* ── CONDITION BAND ── */
.condition-band{
  background:rgba(10,18,11,0.7);
  border-top:2px dashed rgba(232,80,10,0.3);
  border-bottom:2px dashed rgba(232,80,10,0.3);
  padding:3rem 1.5rem;
}
.condition-inner{max-width:800px;margin:0 auto;text-align:center}
.condition-title{
  font-family:'Kaisei Decol',serif;
  font-size:1.3rem;font-weight:700;color:var(--daidai-light);
  margin-bottom:1.5rem;letter-spacing:0.04em;
}
.condition-list{
  display:flex;flex-wrap:wrap;justify-content:center;gap:0.8rem;
}
.condition-item{
  display:flex;align-items:center;gap:0.5rem;
  background:rgba(232,80,10,0.1);
  border:1.5px solid rgba(232,80,10,0.35);
  border-radius:var(--r);
  padding:0.7rem 1.2rem;
  font-family:'DotGothic16',monospace;
  font-size:0.82rem;color:var(--chalk);
  letter-spacing:0.06em;
}
.condition-item .ci-icon{font-size:1.1rem}
.condition-note{
  margin-top:1.2rem;
  font-family:'DotGothic16',monospace;
  font-size:0.75rem;color:var(--chalk-dim);line-height:1.7;
}

/* ── SPONSOR ── */
.sponsor-grid{
  display:flex;flex-wrap:wrap;gap:0.8rem;align-items:center;margin-top:1.5rem;
}
.sponsor-item{height:44px;display:flex;align-items:center}
.sponsor-item img{
  max-height:44px;max-width:160px;object-fit:contain;
  filter:brightness(0.9) invert(0.05);opacity:0.75;
  transition:opacity 0.2s,filter 0.2s;
}
.sponsor-item:hover img{opacity:1;filter:none}
.sponsor-label{
  font-family:'Kaisei Decol',serif;
  font-size:0.95rem;font-weight:700;color:var(--chalk);margin-bottom:0.8rem;
}

/* ── SERIES ── */
.series-sec{background:var(--kuro)}
.series-cards{display:flex;gap:0.8rem;flex-wrap:wrap;margin-top:1.5rem}
.series-card{
  background:rgba(242,237,214,0.05);
  border:1.5px dashed rgba(242,237,214,0.15);
  border-radius:var(--r);
  padding:0.9rem 1.3rem;text-decoration:none;
  display:flex;align-items:center;gap:0.8rem;
  transition:border-color 0.2s,background 0.2s;
}
.series-card:hover{border-color:var(--daidai);background:rgba(232,80,10,0.08)}
.series-card img{height:28px;max-width:110px;object-fit:contain;opacity:0.75;flex-shrink:0}
.series-card span{font-family:'DotGothic16',monospace;font-size:0.78rem;color:var(--chalk-dim)}
.series-card:hover span{color:var(--chalk)}
.social-row{display:flex;gap:0.7rem;margin-top:2rem}
.social-btn{
  display:inline-flex;align-items:center;gap:0.5rem;
  padding:0.5rem 1.1rem;
  border:1.5px dashed rgba(242,237,214,0.2);border-radius:var(--r);
  text-decoration:none;
  font-family:'DotGothic16',monospace;
  font-size:0.78rem;color:var(--chalk-dim);
  transition:all 0.2s;
}
.social-btn svg{width:15px;height:15px}
.social-btn:hover{border-color:var(--daidai-light);color:var(--chalk)}

/* ── FOOTER ── */
footer{
  background:var(--kuro);
  border-top:2px dashed rgba(242,237,214,0.1);
  padding:2rem 1.5rem;
}
.footer-inner{
  max-width:1100px;margin:0 auto;
  display:flex;align-items:center;justify-content:space-between;gap:2rem;flex-wrap:wrap;
}
.footer-logo img{height:28px;opacity:0.45}
.footer-copy{
  font-family:'DotGothic16',monospace;
  font-size:0.72rem;color:rgba(242,237,214,0.2);
  letter-spacing:0.06em;
}

/* BACK TOP */
.back-top{
  position:fixed;bottom:1.5rem;right:1.5rem;
  width:44px;height:44px;background:var(--daidai);
  border:none;border-radius:var(--r);cursor:pointer;
  display:flex;align-items:center;justify-content:center;
  opacity:0;transition:opacity 0.3s,background 0.2s;z-index:90;
  font-size:1.2rem;
}
.back-top.visible{opacity:1}
.back-top:hover{background:var(--daidai-light)}
.back-top svg{width:20px;height:20px;color:var(--chalk)}

/* MOBILE */
@media(max-width:860px){
  .about-grid,.course-grid{grid-template-columns:1fr}
  .cat-grid{grid-template-columns:1fr}
  .prize-grid{grid-template-columns:1fr}
  .nav-links{display:none}
  .hamburger{display:flex}
  .nav-links.open{
    display:flex;flex-direction:column;
    position:fixed;top:60px;left:0;right:0;
    background:rgba(10,18,11,0.98);
    backdrop-filter:blur(10px);
    padding:1.5rem;gap:1.2rem;
    border-bottom:2px dashed rgba(242,237,214,0.12);z-index:99;
  }
  .nav-links.open a{font-size:1rem;color:var(--chalk)}
  .prize-special{flex-direction:column;text-align:center}
}
@media(max-width:500px){
  .sec{padding:3.5rem 1rem}
  .hero{padding:5.5rem 1rem 3.5rem}
}