/* ============================================================
   RIVER RUN MARATHON — 공통 스타일 (헤더 / 푸터 / 베이스 / 버튼)
   index.html, board.html 등 모든 페이지에서 공통으로 불러옵니다.
   ============================================================ */

:root{
  --bg:#F7F5F0;
  --navy:#10192E;
  --navy-2:#1B2740;
  --coral:#FF5A36;
  --gold:#F2B705;
  --ink:#1D2129;
  --line:#DBD5C7;
  --paper:#FFFDF9;
}

*{margin:0;padding:0;box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  font-family:'Noto Sans KR',sans-serif;
  color:var(--ink);
  background:var(--bg);
  line-height:1.6;
}
.display{font-family:'Bebas Neue',sans-serif;letter-spacing:.02em;}
.mono{font-family:'JetBrains Mono',monospace;}
a{color:inherit;text-decoration:none;}
ul{list-style:none;}
img{max-width:100%;display:block;}

.wrap{max-width:1180px;margin:0 auto;padding:0 24px;}

.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:'JetBrains Mono',monospace;font-size:12px;letter-spacing:.12em;
  text-transform:uppercase;color:var(--coral);font-weight:700;
}
.eyebrow::before{content:"";width:18px;height:1px;background:var(--coral);}

/* ===== BUTTON ===== */
.btn{
  display:inline-flex;align-items:center;gap:8px;
  padding:14px 26px;border-radius:2px;font-weight:700;font-size:14px;
  border:1px solid transparent;cursor:pointer;transition:transform .2s ease, background .2s ease;
}
.btn-primary{background:var(--coral);color:#fff;}
.btn-primary:hover{transform:translateY(-2px);background:#ff6c4a;}
.btn-outline{border-color:var(--line);color:var(--navy);background:var(--paper);}
.btn-outline:hover{transform:translateY(-2px);}

/* ============================================================
   HEADER (js/partials.js 로 모든 페이지에 주입됨)
   ============================================================ */
header.site{
  position:sticky;top:0;z-index:100;
  background:rgba(247,245,240,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
  transition:box-shadow .3s ease;
}
header.site.scrolled{box-shadow:0 8px 24px rgba(16,25,46,.08);}
.header-top{
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 24px;max-width:1180px;margin:0 auto;
}
.logo{
  display:flex;align-items:baseline;gap:6px;
  font-family:'Bebas Neue',sans-serif;font-size:26px;color:var(--navy);
}
.logo span{color:var(--coral);}
nav.main-nav{display:flex;gap:36px;}
nav.main-nav > a{
  font-size:15px;font-weight:700;color:var(--navy);
  padding:6px 2px;position:relative;
}
nav.main-nav > a.active{color:var(--coral);}
nav.main-nav > a::after{
  content:"";position:absolute;left:0;bottom:-4px;width:0;height:2px;
  background:var(--coral);transition:width .25s ease;
}
nav.main-nav > a:hover::after,
nav.main-nav > a.active::after{width:100%;}
.header-actions{display:flex;align-items:center;gap:16px;font-size:13px;color:#666;}
.header-actions a:hover{color:var(--coral);}
.btn-hamburger{
  display:none;flex-direction:column;gap:4px;background:none;border:0;cursor:pointer;padding:8px;
}
.btn-hamburger span{width:22px;height:2px;background:var(--navy);}

/* ============================================================
   FOOTER (js/partials.js 로 모든 페이지에 주입됨)
   ============================================================ */
footer{background:var(--navy);color:#B9BECF;padding:64px 0 32px;margin-top:60px;}
.footer-top{display:grid;grid-template-columns:1.3fr 1fr 1fr;gap:40px;margin-bottom:48px;}
.footer-logo{font-family:'Bebas Neue',sans-serif;font-size:26px;color:#fff;margin-bottom:14px;}
.footer-top h4{font-size:13px;color:#fff;margin-bottom:14px;letter-spacing:.05em;}
.footer-top p, .footer-top a{font-size:13px;color:#8991A6;display:block;margin-bottom:8px;}
.footer-contact .tel{font-family:'JetBrains Mono',monospace;font-size:22px;color:#fff;margin-bottom:6px;}
.footer-bottom{
  border-top:1px solid rgba(255,255,255,.1);padding-top:24px;
  display:flex;justify-content:space-between;font-size:12px;color:#6A7286;flex-wrap:wrap;gap:10px;
}
.footer-admin-link{color:#6A7286;}
.footer-admin-link:hover{color:var(--coral);}

/* ===== BACK TO TOP ===== */
.to-top{
  position:fixed;right:24px;bottom:24px;width:48px;height:48px;border-radius:50%;
  background:var(--coral);color:#fff;border:none;cursor:pointer;
  display:flex;align-items:center;justify-content:center;font-size:18px;
  opacity:0;pointer-events:none;transition:opacity .25s ease, transform .25s ease;
  z-index:90;
}
.to-top.show{opacity:1;pointer-events:auto;}
.to-top:hover{transform:translateY(-3px);}

/* ===== SECTION GENERIC (index/board 공용) ===== */
section{padding:88px 0;}
.section-head{margin-bottom:44px;}
.section-head h2{
  font-family:'Bebas Neue',sans-serif;font-size:40px;color:var(--navy);margin-top:10px;
}

/* 모바일 메뉴 뒤 어두운 배경 — 클릭하면 메뉴가 닫힌다 (기본은 숨김) */
.nav-backdrop{
  display:none;position:fixed;inset:0;background:rgba(16,25,46,.45);
  opacity:0;transition:opacity .3s ease;z-index:98;
}
.nav-backdrop.show{display:block;opacity:1;}

/* ===== MOBILE NAV (공용) ===== */
@media (max-width:900px){
  nav.main-nav{
    position:fixed;top:0;right:-100%;width:78%;max-width:320px;height:100vh;
    background:var(--paper);flex-direction:column;gap:0;padding:100px 28px 40px;
    transition:right .3s ease;box-shadow:-10px 0 30px rgba(0,0,0,.15);
    z-index:99;
  }
  nav.main-nav.open{right:0;}
  nav.main-nav > a{padding:16px 0;border-bottom:1px solid var(--line);}
  .btn-hamburger{display:flex;}
  .header-actions{display:none;}
  .footer-top{grid-template-columns:1fr;}
}