/* ============================================================
   USBID v3 Base
   전역 공용 요소: reset, 타이포, 레이아웃 컨테이너, 버튼, 배지,
   섹션, 서브페이지 헤더(.page-head), 카드.
   모든 v3 페이지가 재사용한다. 페이지 고유 스타일은 components/ 로.
   ============================================================ */

/* ── reset ── */
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--bg);color:var(--ink);line-height:1.65;letter-spacing:-.008em;-webkit-font-smoothing:antialiased;min-height:100vh;display:flex;flex-direction:column}
::selection{background:var(--navy-900);color:#fff}
h1,h2,h3,h4{letter-spacing:-.025em;word-break:keep-all;color:var(--navy-900)}
img{max-width:100%}
a{color:inherit}

/* v3 레이아웃에서 본문이 footer 를 아래로 밀어내도록 */
.v3-main{flex:1 0 auto}

/* ── 레이아웃 컨테이너 ── */
.wrap{max-width:1180px;margin:0 auto;padding:0 24px}

/* ── eyebrow (섹션 상단 라벨) ── */
.eyebrow{display:inline-flex;align-items:center;gap:10px;font-family:var(--mono);font-size:11px;letter-spacing:.2em;font-weight:600;color:var(--gold-600);text-transform:uppercase}
.eyebrow::before{content:"";width:26px;height:1.5px;background:var(--gold-500)}

/* ── 버튼 ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;border-radius:6px;font-weight:700;font-size:14.5px;text-decoration:none;transition:all .16s;cursor:pointer;border:none;font-family:inherit;white-space:nowrap}
.btn:focus-visible{outline:2px solid var(--gold-500);outline-offset:2px}
.btn-primary{background:var(--navy-900);color:#fff;padding:12px 24px}
.btn-primary:hover{background:var(--navy-700);box-shadow:var(--shadow-md)}
.btn-gold{background:var(--gold-500);color:#fff;padding:12px 24px}
.btn-gold:hover{background:var(--gold-600);box-shadow:0 6px 18px rgba(184,146,62,.3)}
.btn-outline{border:1.5px solid var(--line);color:var(--navy-900);padding:11px 22px;background:var(--card)}
.btn-outline:hover{border-color:var(--navy-900)}
.btn-ghost{color:var(--ink-soft);padding:10px 12px;background:transparent;font-size:14px}
.btn-ghost:hover{color:var(--navy-900)}
.btn-white{background:#fff;color:var(--navy-900);padding:14px 28px;font-size:15.5px}
.btn-white:hover{box-shadow:0 8px 22px rgba(0,0,0,.28)}
.btn-outline-w{border:1.5px solid rgba(255,255,255,.32);color:#fff;padding:13px 26px;font-size:15.5px;background:transparent}
.btn-outline-w:hover{border-color:#CBA64C;color:#E2C77E}
.btn-lg{padding:14px 30px;font-size:15.5px}
.btn-sm{padding:8px 16px;font-size:13px}

/* ── 타일 / 티어 배지 / 잠금 ── */
.tile{flex-shrink:0;width:48px;height:48px;border-radius:7px;background:var(--navy-900);color:var(--gold-100);display:flex;align-items:center;justify-content:center;font-family:var(--mono);font-size:13px;font-weight:600;letter-spacing:.02em;box-shadow:inset 0 0 0 1px rgba(255,255,255,.07)}
.tile.gold{background:linear-gradient(150deg,#CBA64C,var(--gold-600));color:#fff}
.tier{display:inline-flex;align-items:center;font-family:var(--mono);font-size:9px;font-weight:600;letter-spacing:.12em;border-radius:3px;padding:2.5px 7px;vertical-align:2px;margin-left:7px}
.tier-b{background:#EDEDEA;color:#7A828E}
.tier-p{background:var(--gold-100);color:var(--gold-600)}
.tier-v{background:var(--navy-900);color:#E8D9A8}
.lock{display:inline-flex;align-items:center;gap:5px;font-size:11.5px;font-weight:600;color:var(--muted)}

/* ── 섹션 ── */
.section{padding:92px 0}
.section.tight{padding:64px 0}
.section-head{max-width:660px;margin-bottom:50px}
.section-head .eyebrow{margin-bottom:16px}
h2{font-size:clamp(25px,3.1vw,36px);font-weight:800;line-height:1.28}
.section-desc{margin-top:15px;font-size:16px;color:var(--ink-soft);word-break:keep-all}

/* ── 서브페이지 헤더 (메인 외 모든 페이지 공통) ── */
.page-head{background:var(--navy-900);color:#fff;padding:56px 0 48px;position:relative;overflow:hidden}
.page-head::after{content:"";position:absolute;inset:0;background-image:linear-gradient(rgba(255,255,255,.035) 1px,transparent 1px),linear-gradient(90deg,rgba(255,255,255,.035) 1px,transparent 1px);background-size:48px 48px;mask-image:radial-gradient(ellipse 70% 90% at 85% 10%,#000 10%,transparent 70%)}
.page-head .wrap{position:relative;z-index:1}
.page-head .eyebrow{color:#CBA64C}
.page-head .eyebrow::before{background:#CBA64C}
.page-head h1{font-size:clamp(25px,3.2vw,36px);font-weight:800;color:#fff;margin-top:14px}
.page-head p{margin-top:12px;color:rgba(226,232,242,.78);font-size:15.5px;max-width:640px;word-break:keep-all}
.breadcrumb{font-size:12px;color:rgba(226,232,242,.5);margin-bottom:16px;font-family:var(--mono)}
.breadcrumb a{color:inherit;text-decoration:none;cursor:pointer}
.breadcrumb a:hover{color:#CBA64C}

/* ── 카드 (전역 공용) ── */
.card{background:var(--card);border:1px solid var(--line);border-radius:var(--radius);transition:all .18s ease}
.card:hover{box-shadow:var(--shadow-md);border-color:#D5D0C2}

/* ── 공용 애니메이션 ── */
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.3}}

/* ── 반응형 (공용) ── */
@media (max-width:600px){
  .section{padding:60px 0}
}
@media (prefers-reduced-motion:reduce){*,*::before,*::after{animation:none!important;transition:none!important}}