/* :root{
  --bg: #f8f6f5;
  --text: #2b2b2b;
  --muted: #6f6f6f;
  --red: #a31d2a;           
  --red-dark: #7f1520;
  --gold: #c9a227;         
  --card: #ffffff;
  --alt: #f2eeec;           
  --border: #e7e1de;
  --shadow: 0 6px 24px rgba(0,0,0,.08);
  --radius: 16px;
} */
 :root {
  --bg: #0a0a0c;             /* 背景：より深い夜色 */
  --text: #e8e8ea;           /* 本文：白銀寄りの明るさ */
  --muted: #b0b0b5;          /* サブ：淡い銀灰 */
  --accent: #d9d9df;         /* 基本シルバー */
  --accent-bright: #f5f5fa;  /* 強めの銀光（ハイライト） */
  --card: #141416;           /* カード背景：黒寄り */
  --alt: #1b1b1e;            /* セクション交互背景 */
  --border: #3a3a40;         /* 境界線：銀黒 */
  --shadow: 0 0 25px rgba(220,220,230,.35),
            0 0 45px rgba(255,255,255,.2); /* 銀の輝き感 */
  --radius: 16px;
}


* { box-sizing: border-box; }
html, body { height: 100%; }
body{
  margin:0;
  font-family: "Noto Sans JP", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.7;
}

h1, h2, h3 {
  font-family: "Noto Serif JP", serif;
  letter-spacing: .02em;
  margin: 0 0 .5em;
}

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

.container{
  width: min(1100px, 92%);
  margin-inline: auto;
}

.section{ padding: 72px 0; }
.section.alt{ background: var(--alt); }
.section-header{ text-align: center; margin-bottom: 40px; }
.section-title{
  font-size: clamp(22px, 3.2vw, 32px);
  position: relative;
  display: inline-block;
  padding-bottom: .4em;
}
.section-title::after{
  content:"";
  position:absolute; left:50%; transform:translateX(-50%);
  bottom:0; width: 72px; height: 3px;
  background: linear-gradient(90deg, var(--gold), var(--red));
  border-radius: 2px;
}
.section-subtitle{ color: var(--muted); margin-top: 10px; }

.site-header{
  position: sticky; top:0; z-index: 20;
  background: rgba(255,255,255,.8);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  display: flex; align-items: center; justify-content: space-between;
  padding: 14px 0;
}
.brand{
  font-weight: 700;
  text-decoration: none;
  color: var(--text);
  display: inline-flex; align-items: center; gap: 10px;
  font-size: 18px;
}
.brand-mark{
  color: var(--red);
  font-size: 18px;
}
.nav{
  display: flex; gap: 18px; align-items: center;
}
.nav a{
  color: var(--text);
  text-decoration: none;
  padding: 8px 10px;
  border-radius: 999px;
}
.nav a:hover{ background: var(--alt); }
.nav .btn-outline{
  border: 1px solid var(--red);
  color: var(--red);
}
.nav .btn-outline:hover{
  background: var(--red); color: #fff;
}

.hero{
  position: relative;
  min-height: 60svh;
  display: grid; place-items: center;
  background:
    radial-gradient(1200px 500px at 20% 0%, rgba(163,29,42,.28), transparent 60%),
    radial-gradient(1000px 500px at 80% 100%, rgba(201,162,39,.18), transparent 60%),
    linear-gradient(180deg, #fff, #f6f2f1);
}
.hero-overlay{
  position: absolute; inset: 0;
  background:
    linear-gradient(180deg, rgba(163,29,42,.06), transparent 40%),
    linear-gradient(0deg, rgba(163,29,42,.04), transparent 40%);
  pointer-events: none;
}
.hero-inner{
  text-align: center;
  padding: 80px 0;
}
.hero h1{
  font-size: clamp(28px, 5.5vw, 44px);
}
.hero .lead{
  margin: 14px auto 26px;
  color: var(--muted);
}

.btn{
  display: inline-block;
  padding: 10px 18px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .15s ease, background .15s ease, color .15s ease;
}
.btn-primary{
  background: var(--red);
  color: #fff;
  box-shadow: 0 6px 16px rgba(163,29,42,.22);
}
.btn-primary:hover{ 
  background: var(--red-dark); transform: translateY(-1px); }
.btn-secondary{
  background: var(--gold); color: #212121;
}
.btn-secondary:hover{ filter: brightness(0.95); }

.about-grid{
  display: grid; gap: 24px;
  grid-template-columns: 1.4fr .9fr;
}
.about-card{
  background: var(--card); border:1px solid var(--border); border-radius: var(--radius);
  padding: 20px; box-shadow: var(--shadow);
}
.checklist{ margin: 16px 0 0; padding-left: 1.2em; }
.checklist li{ margin: .3em 0; }

.cards-grid{
  display: grid; gap: 20px;
  grid-template-columns: repeat(3, 1fr);
}
.card{
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  overflow: hidden; box-shadow: var(--shadow);
  display: grid; grid-template-rows: auto 1fr;
}
.card-media img{ width: 100%; aspect-ratio: 4/5; object-fit: cover; }
.card-body{ padding: 16px 16px 18px; }
.card-title{ font-size: 18px; margin-bottom: 6px; }
.card-role{ color: var(--red); font-weight: 700; margin: 0 0 6px; }
.card-text{ color: var(--muted); }

.timeline{
  margin: 0; padding: 0; list-style: none;
  display: grid; gap: 18px;
  position: relative;
}
.timeline::before{
  content:""; position: absolute; left: 12px; top: 0; bottom: 0;
  width: 2px; background: linear-gradient(var(--gold), var(--red));
  opacity: .25;
}
.timeline-item{
  position: relative; padding-left: 40px;
}
.timeline-dot{
  position: absolute; left: 5px; top: .45em;
  width: 14px; height: 14px; border-radius: 50%;
  background: #fff; border: 3px solid var(--red);
  box-shadow: 0 0 0 3px #fff;
}
.timeline-content time{
  display: inline-block; font-weight: 700; color: var(--red);
}
.timeline-content h3{ margin: 4px 0 6px; }

.form{
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  padding: 22px; box-shadow: var(--shadow);
}
.form-grid{
  display: grid; gap: 16px;
  grid-template-columns: repeat(2, 1fr);
}
.form-field{ display: grid; gap: 8px; }
.form-field-full{ grid-column: 1 / -1; }
label{ font-weight: 700; font-size: 14px; }
.req{ color: var(--red); }
input, select, textarea{
  border: 1px solid var(--border);
  border-radius: 12px; padding: 10px 12px;
  background: #fff; color: var(--text);
  font: inherit;
}
input:focus, select:focus, textarea:focus{
  outline: 2px solid color-mix(in srgb, var(--red) 45%, transparent);
  border-color: var(--red);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--red) 18%, transparent);
}
.form-actions{
  display: flex; align-items: center; gap: 16px; justify-content: flex-start;
  margin-top: 12px;
}
.form-note{ color: var(--muted); font-size: 13px; }

.site-footer{
  background: #121111; color: #eae5e2;
  margin-top: 64px; padding: 36px 0;
}
.footer-inner{
  display: grid; gap: 12px;
  grid-template-columns: 1fr auto auto;
  align-items: center;
}
.brand-footer{ margin: 0; font-weight: 700; }
.footer-nav{ display: flex; gap: 16px; flex-wrap: wrap; }
.footer-nav a{ color: #eae5e2; text-decoration: none; opacity: .9; }
.footer-nav a:hover{ opacity: 1; text-decoration: underline; }
.copyright{ opacity: .8; }

@media (max-width: 960px){
  .about-grid{ grid-template-columns: 1fr; }
  .cards-grid{ grid-template-columns: repeat(2, 1fr); }
  .footer-inner{ grid-template-columns: 1fr; justify-items: center; text-align: center; }
}
@media (max-width: 640px){
  .header-inner{ gap: 10px; }
  .nav{ display: none; } 
  .section{ padding: 56px 0; }
  .cards-grid{ grid-template-columns: 1fr; }
  .form-grid{ grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce){
  * { animation: none !important; transition: none !important; }
}
#backToTop {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 48px;
  height: 48px;
  border-radius: 50%;
  border: none;
  background: var(--red);
  color: #fff;
  font-size: 22px;
  cursor: pointer;
  box-shadow: 0 4px 12px rgba(0,0,0,.2);
  opacity: 0;
  visibility: hidden;
  transition: opacity .3s, transform .3s;
}
#backToTop.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}
#backToTop:hover {
  background: var(--red-dark);
}
.site-header.shrink .header-inner { padding: 8px 0; }
.site-header.shrink { background: rgba(255,255,255,.95); box-shadow: 0 4px 20px rgba(0,0,0,.06); }

.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .10s ease;
  transition-delay: var(--reveal-delay, 0ms);
}
.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.modal[aria-hidden="true"] { display: none; }
.modal[aria-hidden="false"] { display: block; }
.modal { position: fixed; inset: 0; z-index: 60; }
.modal-backdrop {
  position: absolute; inset: 0; background: rgba(0,0,0,.35);
  backdrop-filter: blur(2px);
}
.modal-dialog {
  position: relative; margin: 10vh auto 0; width: min(560px, 92%);
  background: var(--card); border: 1px solid var(--border); border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 22px;
}
.modal-close {
  position: absolute; top: 8px; right: 10px;
  width: 40px; height: 40px; border-radius: 50%;
  border: none; background: transparent; font-size: 28px; line-height: 1; cursor: pointer;
}
.modal h3 { margin-top: 6px; margin-bottom: 8px; }
.modal p { color: var(--muted); margin-bottom: 16px; }

@media (prefers-reduced-motion: reduce){
  #backToTop, .reveal { transition: none !important; }
}

.flow-steps {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  margin-top: 24px;
}

.flow-step {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  text-align: center;
  transition: transform .3s, box-shadow .3s;
}
.flow-step:hover {
  transform: translateY(-4px);
  box-shadow: 0 10px 22px rgba(0,0,0,.1);
}

.flow-icon1 {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background-image: url("image/image1.png"); 
  background-size: cover;       
  background-position: center;  
  background-repeat: no-repeat; 
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--red);
}

.flow-icon2 {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background-image: url("image/image2.png"); 
  background-size: cover;       
  background-position: center;  
  background-repeat: no-repeat; 
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--red);
}

.flow-icon3 {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background-image: url("image/image3.png"); 
  background-size: cover;       
  background-position: center;  
  background-repeat: no-repeat; 
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--red);
}
.flow-icon4 {
  width: 48px;
  height: 48px;
  margin: 0 auto 12px;
  border-radius: 50%;
  background-image: url("image/image4.png"); 
  background-size: cover;       
  background-position: center;  
  background-repeat: no-repeat; 
  color: #fff;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 18px;
  box-shadow: 0 0 0 4px #fff, 0 0 0 6px var(--red);
}

.flow-step h3 {
  margin: 8px 0;
  font-size: 18px;
}

.flow-step p {
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

@media (max-width: 960px) {
  .flow-steps {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (max-width: 560px) {
  .flow-steps {
    grid-template-columns: 1fr;
  }
}

.faq-list {
  display: grid;
  gap: 16px;
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--card);
  box-shadow: var(--shadow);
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: 16px 20px;
  font-weight: 700;
  background: none;
  border: none;
  font-size: 16px;
  cursor: pointer;
  position: relative;
}

.faq-question::after {
  content: "＋";
  position: absolute;
  right: 20px;
  font-weight: 700;
  transition: transform .3s;
}

.faq-question[aria-expanded="true"]::after {
  content: "－";
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  padding: 0 20px;
  transition: max-height .4s ease, padding .3s ease;
  color: var(--muted);
  font-size: 15px;
}

.faq-answer p {
  margin: 12px 0 16px;
}

.faq-item.open .faq-answer {
  max-height: 300px;
  padding: 0 20px 12px;
}

.about-tabs{
  display: flex; gap: 10px; flex-wrap: wrap; justify-content: center;
  margin-bottom: 18px;
}
.about-tab{
  border: 1px solid var(--border);
  background: #fff;
  color: var(--text);
  border-radius: 999px;
  padding: 8px 14px;
  font-weight: 700;
  cursor: pointer;
}
.about-tab.is-active{
  background: var(--red);
  border-color: var(--red);
  color: #fff;
}
.about-panels{ margin-top: 10px; }

.cards-3{
  display: grid; gap: 18px;
  grid-template-columns: repeat(3, 1fr);
}
.mini-card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 18px;
  transition: transform .25s ease, box-shadow .25s ease;
}
.mini-card:hover{
  transform: translateY(-3px);
  box-shadow: 0 12px 24px rgba(0,0,0,.08);
}

.tilt:hover{ transform: translateY(-3px) rotateX(1deg) rotateY(-1deg); }

.about-stats{
  display: grid; gap: 16px; margin-top: 28px;
  grid-template-columns: repeat(3, 1fr);
  background:
    radial-gradient(420px 160px at 10% -20%, rgba(163,29,42,.10), transparent 60%),
    radial-gradient(420px 160px at 90% 120%, rgba(201,162,39,.10), transparent 60%);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 18px;
}
.stat{
  text-align: center; padding: 8px;
}
.stat-num{
  font-family: "Noto Serif JP", serif;
  font-size: clamp(28px, 5vw, 40px);
  font-weight: 700;
  color: var(--red);
  line-height: 1.1;
}
.stat-label{ color: var(--muted); }

.about-grid{
  display: grid; gap: 24px;
  grid-template-columns: 1.4fr .9fr;
}

@media (max-width: 960px){
  .cards-3{ grid-template-columns: 1fr 1fr; }
  .about-stats{ grid-template-columns: 1fr 1fr 1fr; }
  .about-grid{ grid-template-columns: 1fr; }
}
@media (max-width: 560px){
  .cards-3{ grid-template-columns: 1fr; }
  .about-stats{ grid-template-columns: 1fr; }
}
.about-panel{ display: none; }
.about-panel.is-active{ display: block; }


#about .flip {
  perspective: 1000px;
}
#about .flip .face {
  backface-visibility: hidden;
  transition: transform .6s;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  min-height: 220px;
  background: var(--card);
}
#about .flip .front {
  transform: rotateY(0);
}
#about .flip .back {
  transform: rotateY(180deg);
  position: absolute; inset: 0;
  display: grid; place-content: center;
  background: var(--alt);
}
#about .flip:hover .front {
  transform: rotateY(-180deg);
}
#about .flip:hover .back {
  transform: rotateY(0);
}

#about .flip {
  perspective: 1000px;
  position: relative;
}

#about .flip .face {
  backface-visibility: hidden;
  transition: transform .6s;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  min-height: 220px;
  display: grid;
  place-content: center;
  text-align: center;
  font-weight: 600;
}

#about .flip.mission .front {
  background: #fbe4e8;   
  color: #7f1520;       
}
#about .flip.activities .front {
  background: #fcf3df;  
  color: #7a5c15;       
}
#about .flip.support .front {
  background: #f1f1f1;  
  color: #333;
}

#about .flip .back {
  transform: rotateY(180deg);
  position: absolute; inset: 0;
  background: var(--card);
  color: var(--text);
  display: grid; place-content: center;
  padding: 24px;
}

#about .flip:hover .front {
  transform: rotateY(-180deg);
}
#about .flip:hover .back {
  transform: rotateY(0);
}

#about .flip .front,
#about .flip .back,
#about .flip :is(.front, .back),
#about .flip :is(.front, .back) * {
  font-family: "Noto Sans JP", system-ui, sans-serif !important;
  color: var(--text);
}

#about .flip :is(h3, h4) {
  font-family: "Noto Serif JP", serif !important;
  font-weight: 700;
}
input.error, select.error, textarea.error {
  border: 2px solid #e74c3c;
  background: #fff5f5;
}




/* ===== Achievements (White/Silver/Black) — Scoped to #achievements ===== */
/* ❶ ここは :root ではなく #achievements に置く */
#achievements{
  --achv-bg: #ffffff;
  --achv-text: #121212;
  --achv-muted: #6a6a6a;
  --achv-silver: #cfd3d6;
  --achv-silver-deep: #9ea4a8;
  --achv-border: #e9ecef;
  --achv-shadow: 0 8px 28px rgba(0,0,0,.10);
  --achv-radius: 16px;

  background: var(--achv-bg);
}
/* 追加の小パーツ */
#achievements .achv-extra{
  margin-top: 8px; display:flex; align-items:center; gap:10px; flex-wrap:wrap;
}
#achievements .achv-info{
  margin:0; font-size:12px; color:var(--achv-muted);
  padding:4px 8px; border:1px solid var(--achv-border); border-radius:8px; background:#fff;
}
#achievements .achv-cta{
  display:inline-flex; align-items:center; gap:6px;
  font-size:12px; font-weight:700; text-decoration:none; color:var(--achv-text);
  padding:6px 10px; border-radius:999px; background:linear-gradient(180deg,#fff,#f7f9fa);
  border:1px solid var(--achv-silver); box-shadow: inset 0 0 0 1px var(--achv-silver), 0 6px 18px rgba(0,0,0,.06);
  transition: transform .15s ease, box-shadow .2s ease;
}
#achievements .achv-cta:hover{ transform: translateY(-1px); box-shadow: var(--achv-shadow); }
#achievements .x-ic{ display:block; }

/* ❷ 以降は全部 #achievements でスコープする */
#achievements .achv-filters{
  display:flex; flex-wrap:wrap; gap:8px; margin:12px 0 24px;
}
#achievements .chip{
  appearance:none; border:1px solid var(--achv-border);
  background:#fff; color:var(--achv-text);
  padding:8px 14px; border-radius:999px;
  font-weight:600; letter-spacing:.02em;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease;
}
#achievements .chip:hover{ transform: translateY(-1px); box-shadow: var(--achv-shadow); }
#achievements .chip.is-active{
  background: linear-gradient(180deg,#fff,#f7f9fa);
  border-color: var(--achv-silver);
  box-shadow: inset 0 0 0 1px var(--achv-silver), 0 6px 18px rgba(0,0,0,.08);
}

#achievements .achv-year{
  font-size: clamp(20px, 2vw, 28px);
  margin:24px 0 12px; font-weight:800; letter-spacing:.04em; color:var(--achv-text); position:relative;
}
#achievements .achv-year::after{
  content:""; display:block; height:2px; width:80px; margin-top:8px;
  background: linear-gradient(90deg, var(--achv-silver), transparent);
}

#achievements .achv-row{
  display:grid; grid-template-columns: repeat(12,1fr); gap:16px;
}
@media (max-width: 960px){ #achievements .achv-row{ grid-template-columns: repeat(6,1fr); } }
@media (max-width: 600px){ #achievements .achv-row{ grid-template-columns: repeat(2,1fr); } }

#achievements .achv-card{ grid-column: span 4; }
@media (max-width: 960px){ #achievements .achv-card{ grid-column: span 6; } }
@media (max-width: 600px){ #achievements .achv-card{ grid-column: span 2; } }

#achievements .achv-link{ display:block; text-decoration:none; color:inherit; }
#achievements .achv-media{
  margin:0; border-radius: var(--achv-radius); overflow:hidden; position:relative;
  box-shadow: var(--achv-shadow); background:#f5f7f9;
}
#achievements .achv-media img{
  width:100%; height:auto; display:block; aspect-ratio:3/2; object-fit:cover;
  transform: scale(1.001); transition: transform .4s ease; will-change: transform; filter:saturate(1.02);
}
#achievements .achv-media::before{
  content:""; position:absolute; inset:0;
  background: linear-gradient(120deg, rgba(255,255,255,0.0) 0%, rgba(255,255,255,.45) 40%, rgba(255,255,255,0.0) 60%);
  transform: translateX(-120%); transition: transform .6s ease; pointer-events:none;
}
#achievements .achv-link:hover .achv-media::before{ transform: translateX(120%); }
#achievements .achv-link:hover img{ transform: scale(1.03); }

#achievements .achv-meta{
  position:absolute; left:12px; bottom:12px; right:12px;
  display:flex; flex-direction:column; gap:4px; color:#111;
}
#achievements .achv-type{
  align-self:flex-start; font-size:12px; font-weight:700; letter-spacing:.08em;
  padding:4px 8px; border-radius:999px; background:rgba(255,255,255,.88);
  box-shadow:0 2px 8px rgba(0,0,0,.08); border:1px solid rgba(207,211,214,.6);
}
#achievements .achv-title{
  font-weight:800; font-size:clamp(14px,1.6vw,18px); line-height:1.2;
  text-shadow:0 1px 2px rgba(255,255,255,.6);
  background:rgba(255,255,255,.7); padding:2px 6px; border-radius:8px; align-self:flex-start;
}
#achievements .achv-where{
  font-size:12px; color:var(--achv-muted);
  background:rgba(255,255,255,.85); padding:2px 6px; border-radius:6px; align-self:flex-start;
}

/* Lightbox（これは全ページで共有でOKならそのままグローバルでも可） */
.lightbox{
  position:fixed; inset:0; display:none; align-items:center; justify-content:center; z-index:1000;
  background: rgba(10,10,10,.7); backdrop-filter: blur(6px);
}
.lightbox.is-open{ display:flex; }
.lightbox-img{ max-width:min(92vw,1200px); max-height:80vh; border-radius:12px; box-shadow:0 12px 40px rgba(0,0,0,.5); }
.lightbox-caption{ margin-top:12px; color:#f1f1f1; text-align:center; font-size:14px; }
.lightbox-close{
  position:absolute; top:12px; right:12px; width:40px; height:40px; border-radius:50%;
  border:1px solid rgba(255,255,255,.3); background:rgba(255,255,255,.12);
  color:#fff; font-size:22px; cursor:pointer; display:grid; place-items:center;
}
.lightbox-close:hover{ background: rgba(255,255,255,.22); }



/* ===== Achievements theme (White/Silver/Black) — Scoped ===== */
#achievements{
  --achv-bg:#fff; --achv-text:#121212; --achv-muted:#6a6a6a;
  --achv-silver:#cfd3d6; --achv-border:#e9ecef;
  --achv-shadow:0 8px 28px rgba(0,0,0,.10); --achv-radius:16px;
  background:var(--achv-bg); color:var(--achv-text);
}
#achievements .section-title{ color:var(--achv-text); }
#achievements .section-subtitle{ color:var(--achv-muted); }

#achievements .achv-year{
  font-size:clamp(20px,2vw,28px); margin:6px 0 14px; font-weight:800; letter-spacing:.04em; position:relative;
}
#achievements .achv-year::after{ content:""; display:block; height:2px; width:80px; margin-top:8px;
  background:linear-gradient(90deg,var(--achv-silver),transparent); }

#achievements .achv-row{ display:grid; grid-template-columns:repeat(12,1fr); gap:16px; }
@media (max-width:960px){ #achievements .achv-row{ grid-template-columns:repeat(6,1fr); } }
@media (max-width:600px){ #achievements .achv-row{ grid-template-columns:repeat(2,1fr); } }

#achievements .achv-card{ grid-column:span 4; }
@media (max-width:960px){ #achievements .achv-card{ grid-column:span 6; } }
@media (max-width:600px){ #achievements .achv-card{ grid-column:span 2; } }

#achievements .achv-link{ display:block; text-decoration:none; color:inherit; }
#achievements .achv-media{
  margin:0; border-radius:var(--achv-radius); overflow:hidden; position:relative; background:#f5f7f9; box-shadow:var(--achv-shadow);
}
#achievements .achv-media img{
  width:100%; display:block; aspect-ratio:3/2; object-fit:cover; object-position:50% 50%;
  transform:scale(1.001); transition:transform .4s ease; filter:saturate(1.02);
}
#achievements .achv-media::before{
  content:""; position:absolute; inset:0;
  background:linear-gradient(120deg,rgba(255,255,255,0) 0%,rgba(255,255,255,.45) 40%,rgba(255,255,255,0) 60%);
  transform:translateX(-120%); transition:transform .6s ease; pointer-events:none;
}
#achievements .achv-link:hover .achv-media::before{ transform:translateX(120%); }
#achievements .achv-link:hover img{ transform:scale(1.03); }

#achievements .achv-meta{ position:absolute; left:12px; bottom:12px; right:12px; display:flex; flex-direction:column; gap:4px; color:#111; }
#achievements .achv-type{
  align-self:flex-start; font-size:12px; font-weight:700; letter-spacing:.08em; padding:4px 8px; border-radius:999px;
  background:rgba(255,255,255,.88); border:1px solid rgba(207,211,214,.6); box-shadow:0 2px 8px rgba(0,0,0,.08);
}
#achievements .achv-title{
  font-weight:800; font-size:clamp(14px,1.6vw,18px); line-height:1.2; text-shadow:0 1px 2px rgba(255,255,255,.6);
  background:rgba(255,255,255,.7); padding:2px 6px; border-radius:8px; align-self:flex-start;
}
#achievements .achv-where{ font-size:12px; color:var(--achv-muted); background:rgba(255,255,255,.85); padding:2px 6px; border-radius:6px; }

/* 縦長サムネ切替（自動判定で .is-portrait 付与） */
#achievements .achv-card.is-portrait .achv-media img{ aspect-ratio:2/3; }
#achievements .achv-card.is-portrait{ grid-column:span 3; }
@media (max-width:960px){ #achievements .achv-card.is-portrait{ grid-column:span 3; } }
@media (max-width:600px){ #achievements .achv-card.is-portrait{ grid-column:span 2; } }

/* Extra（CTA等） */
#achievements .achv-extra{ margin-top:8px; display:flex; align-items:center; gap:10px; flex-wrap:wrap; }
#achievements .achv-info{ margin:0; font-size:12px; color:var(--achv-muted); padding:4px 8px; border:1px solid var(--achv-border); border-radius:8px; background:#fff; }
#achievements .achv-cta{
  display:inline-flex; align-items:center; gap:6px; font-size:12px; font-weight:700; text-decoration:none; color:var(--achv-text);
  padding:6px 10px; border-radius:999px; background:linear-gradient(180deg,#fff,#f7f9fa);
  border:1px solid var(--achv-silver); box-shadow:inset 0 0 0 1px var(--achv-silver), 0 6px 18px rgba(0,0,0,.06); cursor:pointer;
}
#achievements .achv-cta:hover{ transform:translateY(-1px); box-shadow:var(--achv-shadow); }
#achievements .x-ic{ display:block; }

/* ミニギャラリー（PC:グリッド / SP:横スクロール） */
#achievements .achv-mini-gallery{ margin-top:10px; display:grid; grid-template-columns:repeat(6,1fr); gap:6px; }
@media (max-width:600px){
  #achievements .achv-mini-gallery{
    display:grid; grid-auto-flow:column; grid-auto-columns:35%; overflow-x:auto; gap:8px; padding-bottom:4px;
    scroll-snap-type:x mandatory; -webkit-overflow-scrolling:touch;
  }
  #achievements .achv-mini-gallery .mini{ scroll-snap-align:start; }
}
#achievements .achv-mini-gallery .mini{
  display:block; border:1px solid var(--achv-border); border-radius:10px; overflow:hidden; background:#fff;
  box-shadow:0 2px 8px rgba(0,0,0,.04); transition:transform .15s ease, box-shadow .2s ease;
}
#achievements .achv-mini-gallery .mini:hover{ transform:translateY(-1px); box-shadow:var(--achv-shadow); }
#achievements .achv-mini-gallery .mini img{ width:100%; display:block; aspect-ratio:1/1; object-fit:cover; }
#achievements .achv-mini-gallery .more{ display:none; }
#achievements .achv-mini-gallery.is-expanded .more{ display:contents; }
#achievements .achv-more-toggle{ margin-top:8px; }

/* Lightbox（実績専用） */
.lightbox{ position:fixed; inset:0; display:none; align-items:center; justify-content:center; z-index:1000; background:rgba(10,10,10,.7); backdrop-filter: blur(6px); }
.lightbox.is-open{ display:flex; }
.lightbox-img{ max-width:min(92vw,1200px); max-height:80vh; border-radius:12px; box-shadow:0 12px 40px rgba(0,0,0,.5); }
.lightbox-caption{ margin-top:12px; color:#f1f1f1; text-align:center; font-size:14px; }
.lightbox-close{ position:absolute; top:12px; right:12px; width:40px; height:40px; border-radius:50%;
  border:1px solid rgba(255,255,255,.3); background:rgba(255,255,255,.12); color:#fff; font-size:22px; cursor:pointer; display:grid; place-items:center; }
.lightbox-close:hover{ background:rgba(255,255,255,.22); }
/* 前後ナビ */
.lightbox .nav-btn{ position:absolute; top:50%; transform:translateY(-50%); width:44px; height:44px; border-radius:50%;
  border:1px solid rgba(255,255,255,.35); background:rgba(255,255,255,.12); color:#fff; font-size:22px; cursor:pointer; display:grid; place-items:center; }
.lightbox .nav-prev{ left:16px; } .lightbox .nav-next{ right:16px; }
.lightbox .nav-btn:hover{ background:rgba(255,255,255,.22); }

.ticket-card {
  display: flex;
  align-items: center;
  gap: 20px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  max-width: 800px;
  margin: 0 auto;
}

.ticket-logo img {
  width: 180px;      /* 横長感を出す */
  height: auto;
  border-radius: 12px;
  object-fit: contain;
}

.ticket-body {
  flex: 1;
}

.ticket-body h3 {
  margin: 0 0 8px;
  font-size: 18px;
}

.ticket-body p {
  font-size: 14px;
  color: var(--muted);
  margin-bottom: 12px;
}

.ticket-body .btn {
  font-size: 13px;
  padding: 8px 14px;
}
/* 画像を中央に揃えて額縁風装飾 */
#achievements .achv-media img {
  display: block;
  margin: 0 auto;                /* 中央寄せ */
  border: 8px solid #e0e0e0;     /* 額縁っぽい枠線（色は好みで） */
  border-radius: 12px;           /* 少し丸みをつける */
  box-shadow: 0 6px 20px rgba(0,0,0,.15); /* 立体感を追加 */
  background: #fff;              /* 額縁の下地 */
  padding: 6px;                  /* 枠と画像の間に余白を作る */
}


.section-title::after {
  background: linear-gradient(90deg,
    var(--accent-bright),
    var(--accent),
    var(--accent-bright)
  );
  box-shadow: 0 0 12px rgba(255,255,255,.6);
}


.btn-primary {
  background: linear-gradient(135deg, #f0f0f5, #bfc2c7, #f5f5fa);
  color: #111;
  box-shadow: 0 0 20px rgba(220,220,230,.55);
  border: 1px solid #e0e0e5;
}
.btn-primary:hover {
  background: linear-gradient(135deg, #ffffff, #d9d9de, #ffffff);
  box-shadow: 0 0 25px rgba(240,240,245,.85);
}


.btn-secondary {
  background: #2a2a2e;
  color: var(--accent-bright);
  border: 1px solid var(--accent);
}
.hero {
  background:
    radial-gradient(800px 400px at 25% 0%, rgba(245,245,250,.35), transparent 70%),
    radial-gradient(800px 400px at 80% 100%, rgba(200,200,220,.25), transparent 70%),
    linear-gradient(180deg, #0a0a0c, #1b1b1e);
  color: var(--accent-bright);
  text-shadow: 0 0 6px rgba(255,255,255,.55);
}
#achievements .achv-media img {
  border: 4px solid #d9d9df;      /* 強い銀の縁取り */
  border-radius: 12px;
  box-shadow: 0 0 18px rgba(220,220,230,.45);
  background: #111;
}
/* ===== Night×Silver Header ===== */
.site-header{
  position: sticky; top: 0; z-index: 20;
  background:
    linear-gradient(180deg, rgba(245,245,250,.12), rgba(245,245,250,.04)),
    rgba(10,10,12,.72);
  backdrop-filter: blur(10px) saturate(120%);
  border-bottom: 1px solid rgba(220,220,230,.18);
  box-shadow:
    0 2px 20px rgba(0,0,0,.35),
    inset 0 -1px 0 rgba(255,255,255,.06);
  color: var(--accent-bright);
}

/* 下端に“銀の光”ライン */
.site-header::after{
  content:"";
  position:absolute; left:0; right:0; bottom:0; height:2px;
  background: linear-gradient(90deg,
    rgba(255,255,255,.55),
    rgba(190,190,200,.28) 35%,
    rgba(150,150,160,.12) 65%,
    transparent 100%);
  pointer-events:none;
}

/* スクロール縮小時：少し不透明＆光を強める */
.site-header.shrink{
  background:
    linear-gradient(180deg, rgba(245,245,250,.16), rgba(245,245,250,.06)),
    rgba(10,10,12,.86);
  box-shadow:
    0 6px 28px rgba(0,0,0,.45),
    inset 0 -1px 0 rgba(255,255,255,.08);
}
.site-header.shrink .header-inner{ padding: 8px 0; }

/* ブランド＆ロゴ（ダーク背景で映えるよう補正） */
.brand{
  color: var(--accent-bright);
}
.brand img{
  /* ロゴが暗く沈む場合だけ有効化： */
  /* filter: invert(1) grayscale(1) brightness(1.4) contrast(.9); */
}

/* ナビ（文字は白銀、ホバーで銀の輪郭がふわっと） */
.nav a{
  color: var(--accent-bright);
  opacity: .9;
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 999px;
  transition: background .2s ease, box-shadow .2s ease, opacity .2s ease;
}
.nav a:hover,
.nav a:focus-visible{
  background: rgba(255,255,255,.07);
  box-shadow:
    0 0 12px rgba(230,230,240,.25),
    inset 0 0 0 1px rgba(220,220,230,.25);
  opacity: 1;
  outline: none;
}

/* “応募”ボタン（銀メタル仕様） */
.nav .btn-outline{
  border: 1px solid #d9d9df;
  color: #0f0f12;
  background: linear-gradient(135deg, #f0f0f6, #c7cbd1, #f7f7fb);
  box-shadow: 0 4px 14px rgba(220,220,230,.35);
}
.nav .btn-outline:hover,
.nav .btn-outline:focus-visible{
  background: linear-gradient(135deg, #ffffff, #dfe2e7, #ffffff);
  box-shadow: 0 6px 18px rgba(240,240,245,.6);
  color: #0f0f12;
}

/* モバイルでの読みやすさ */
@media (max-width: 640px){
  .site-header{ background:
    linear-gradient(180deg, rgba(245,245,250,.12), rgba(245,245,250,.04)),
    rgba(10,10,12,.88); }
}
/* ===== Aboutのフリップカード（表）の文字を黒で強制 ===== */
#about .flip .front,
#about .flip .front * {
  color: #111 !important;      /* 黒で固定（背景が淡色でも読める） */
  text-shadow: none !important;
  opacity: 1 !important;
}

/* 裏面は従来どおり（サイト共通色） */
#about .flip .back,
#about .flip .back * {
  color: var(--text);
}
/* 実績セクションの背景を夜×銀トーンに */
#achievements {
  --achv-bg: linear-gradient(180deg, #0a0a0c, #1a1a1d);  /* 夜空風グラデーション */
  --achv-text: #e8e8ea;         /* 白銀テキスト */
  --achv-muted: #b0b0b5;        /* サブ：銀灰 */
  --achv-silver: #d9d9df;       /* 明るい銀 */
  --achv-border: #3a3a40;       /* 銀黒の枠線 */
  --achv-shadow: 0 0 25px rgba(220,220,230,.35),
                 0 0 45px rgba(255,255,255,.2); /* 輝き感 */
  color: var(--achv-text);
  background: var(--achv-bg);
}
/* ===== FAQ ＆ お問い合わせフォーム ===== */
#faq,
#contact {
  background: linear-gradient(180deg, #0a0a0c, #1a1a1d); /* 夜空調 */
  color: #e8e8ea;
}

/* 質問カード */
.faq-item {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(220,220,230,.25);
  border-radius: 12px;
  margin-bottom: 16px;
  padding: 16px 20px;
  color: #f0f0f5;
  box-shadow:
    0 0 20px rgba(220,220,230,.15),
    inset 0 0 8px rgba(255,255,255,.05);
  transition: background .25s ease, box-shadow .25s ease;
}
.faq-item:hover {
  background: rgba(255,255,255,.08);
  box-shadow:
    0 0 25px rgba(220,220,230,.25),
    inset 0 0 12px rgba(255,255,255,.08);
}

/* 質問文 */
.faq-question {
  font-weight: 600;
  color: #f5f5fa;
}

/* 回答（開いたとき） */
.faq-answer {
  color: #d0d0d5;
  margin-top: 8px;
  line-height: 1.7;
}

/* お問い合わせフォーム本体 */
#contact .form {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(220,220,230,.25);
  border-radius: 16px;
  padding: 24px;
  box-shadow: 0 0 28px rgba(220,220,230,.2);
}

/* 入力フィールド */
#contact .form-field input,
#contact .form-field textarea,
#contact .form-field select {
  background: rgba(10,10,12,.8);
  border: 1px solid rgba(220,220,230,.25);
  border-radius: 8px;
  color: #f0f0f5;
  padding: 10px 14px;
}
#contact .form-field input:focus,
#contact .form-field textarea:focus {
  outline: none;
  border-color: #d9d9df;
  box-shadow: 0 0 8px rgba(220,220,230,.45);
}

/* ボタン（銀メタル仕様） */
#contact .btn-primary {
  background: linear-gradient(135deg, #f0f0f6, #c7cbd1, #f7f7fb);
  color: #111;
  border: 1px solid #d9d9df;
  box-shadow: 0 4px 14px rgba(220,220,230,.35);
}
#contact .btn-primary:hover {
  background: linear-gradient(135deg, #ffffff, #dfe2e7, #ffffff);
  box-shadow: 0 6px 18px rgba(240,240,245,.6);
}