/* CS-1-1: 공통 화면 레이아웃과 색상 */
:root{font-family:system-ui,-apple-system,"Noto Sans KR",sans-serif;color:#172033;background:#f3f6fb;line-height:1.5}*{box-sizing:border-box}body{margin:0}.site-header{min-height:64px;padding:10px max(24px,calc((100vw - 1080px)/2));display:flex;align-items:center;justify-content:space-between;background:#10243e;color:#fff}.brand,.site-header a{color:#fff;text-decoration:none}.brand{font-size:20px;font-weight:800;flex-shrink:0}.header-tools{display:flex;align-items:center;gap:20px;margin-left:auto}.site-header nav{display:flex;align-items:center;gap:20px}.site-header .header-logout{padding:0;background:transparent;color:#fff;font-size:inherit}.session-compact{display:grid;gap:1px;padding-left:16px;border-left:1px solid rgba(255,255,255,.35);font-size:11px;line-height:1.3;white-space:nowrap;color:#dbe6f5}.container{max-width:1080px;margin:40px auto;padding:0 20px}.card{background:#fff;border:1px solid #dce3ee;border-radius:16px;padding:28px;box-shadow:0 12px 32px rgba(25,47,79,.08)}.narrow{max-width:520px;margin:0 auto}.center{text-align:center}.muted,small{color:#64748b}.section-heading,.actions,.registration-box{display:flex;align-items:center;justify-content:space-between;gap:20px}.actions{justify-content:flex-start;margin-top:24px}.registration-box{justify-content:flex-start;background:#f6f9fd;border-radius:12px;padding:18px;margin:18px 0}.summary>div{display:grid;grid-template-columns:140px 1fr;border-bottom:1px solid #e7ebf2;padding:12px 0}.summary dt{font-weight:700}.summary dd{margin:0}
/* CS-1-2: 폼과 버튼 */
.site-actions{margin-top:0}
form{margin:0}label{display:grid;gap:7px;font-weight:700;margin:16px 0}input,select{width:100%;padding:12px;border:1px solid #b8c3d3;border-radius:9px;font:inherit}button,.button{display:inline-block;border:0;border-radius:9px;background:#1559c5;color:#fff;padding:11px 17px;font:inherit;font-weight:700;text-decoration:none;cursor:pointer}.secondary{background:#45566f}.danger{background:#b42318}.badge{display:inline-block;border-radius:999px;background:#e8f0fe;color:#174ea6;padding:3px 9px;font-size:12px}.qr{width:280px;height:280px;margin:20px auto;padding:12px;background:#fff;border:1px solid #dce3ee}.qr img,.qr canvas,.qr svg{width:100%!important;height:100%!important}.fallback-code{display:block;overflow-wrap:anywhere;font-size:11px}.table-wrap{overflow:auto}table{width:100%;border-collapse:collapse}th,td{text-align:left;border-bottom:1px solid #e4e9f1;padding:12px 10px;white-space:nowrap}.result-modal{border:0;border-radius:14px;padding:26px;max-width:420px;box-shadow:0 20px 70px rgba(0,0,0,.25)}.result-modal::backdrop{background:rgba(10,20,35,.48)}
@media(max-width:640px){.site-header{align-items:flex-start;flex-direction:column;padding:12px 20px;gap:10px}.header-tools{width:100%;align-items:flex-start;flex-direction:column;gap:8px;margin-left:0}.site-header nav{flex-wrap:wrap;gap:8px 14px;font-size:13px}.session-compact{width:100%;grid-template-columns:repeat(3,auto);gap:10px;padding-left:0;border-left:0;font-size:10px;white-space:normal}.container{margin:20px auto}.card{padding:20px}.section-heading,.actions,.registration-box{align-items:stretch;flex-direction:column}.qr{width:240px;height:240px}}
/* CS-1-3: 관리자 표와 일회성 secret 표시 */
.admin-nav{margin:0 0 16px}.admin-nav a{color:#1559c5}.inline-grid{display:grid;grid-template-columns:repeat(4,minmax(150px,1fr));gap:12px;align-items:end;margin-bottom:24px}.inline-grid label{margin:0}.row-form{display:contents}.row-form input,.row-form select{min-width:110px;padding:8px}.row-actions{display:flex;gap:8px}.secret-once{background:#fff3cd;border:1px solid #e6c75b;border-radius:12px;padding:18px;margin-bottom:18px}.secret-once code{overflow-wrap:anywhere}.top-gap{margin-top:24px}@media(max-width:800px){.inline-grid{grid-template-columns:1fr}.row-actions{flex-direction:column}}