/* ============================================================
   Panel de Administración · Certificados QR
   Identidad: institucional, sobrio, confiable.
   ============================================================ */
:root{
    --ink:#1a2332;          /* azul tinta oscuro */
    --ink-soft:#4a5568;
    --paper:#f7f8fa;
    --white:#ffffff;
    --line:#e2e8f0;
    --line-soft:#eef1f5;
    --brand:#1e3a5f;        /* azul institucional */
    --brand-2:#2c5282;
    --green:#1a7a4c;
    --green-bg:#e6f4ec;
    --red:#c53030;
    --red-bg:#fbe9e9;
    --blue:#2b6cb0;
    --amber:#b7791f;
    --amber-bg:#fdf6e3;
    --radius:10px;
    --radius-sm:7px;
    --shadow:0 1px 3px rgba(26,35,50,.08),0 1px 2px rgba(26,35,50,.04);
    --shadow-lg:0 10px 30px rgba(26,35,50,.10);
    --font:'Segoe UI',system-ui,-apple-system,Roboto,Helvetica,Arial,sans-serif;
}
*{box-sizing:border-box}
body{
    margin:0;font-family:var(--font);color:var(--ink);
    background:var(--paper);line-height:1.55;font-size:15px;
}
h1,h2,h3{color:var(--ink);line-height:1.2;margin:0 0 .4em}
h1{font-size:1.6rem;letter-spacing:-.01em}
h3{font-size:1.05rem}
a{color:var(--brand-2);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:'SF Mono',Consolas,'Courier New',monospace;font-size:.9em;background:var(--line-soft);padding:2px 6px;border-radius:4px;color:var(--ink)}

/* ---------- Layout ---------- */
.container{max-width:1080px;margin:0 auto;padding:28px 20px 60px}
.page-center{display:flex;align-items:center;justify-content:center;min-height:100vh;padding:20px;background:linear-gradient(160deg,#1e3a5f 0%,#2c5282 100%)}

/* ---------- Topbar ---------- */
.topbar{background:var(--brand);color:#fff;box-shadow:var(--shadow)}
.topbar-inner{max-width:1080px;margin:0 auto;padding:0 20px;display:flex;align-items:center;justify-content:space-between;height:58px}
.topbar-brand{color:#fff;font-weight:700;font-size:1.1rem;letter-spacing:-.01em}
.topbar-brand:hover{text-decoration:none;opacity:.9}
.topbar-nav{display:flex;gap:4px;align-items:center}
.topbar-nav a{color:rgba(255,255,255,.82);padding:8px 14px;border-radius:var(--radius-sm);font-size:.92rem;transition:.15s}
.topbar-nav a:hover{background:rgba(255,255,255,.12);color:#fff;text-decoration:none}
.topbar-nav a.active{background:rgba(255,255,255,.18);color:#fff}
.topbar-nav a.logout{color:#ffd6d6}

/* ---------- Cards ---------- */
.card{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:24px;box-shadow:var(--shadow);margin-bottom:20px}
.card-narrow{width:100%;max-width:400px}
.brand{text-align:center;font-size:1.4rem;margin-bottom:.2em}

/* ---------- Page head ---------- */
.page-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:20px;flex-wrap:wrap}
.page-head h1{margin:0}

/* ---------- Stats ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:14px;margin-bottom:22px}
.stat{background:var(--white);border:1px solid var(--line);border-radius:var(--radius);padding:16px 18px;box-shadow:var(--shadow)}
.stat-num{display:block;font-size:1.8rem;font-weight:700;line-height:1}
.stat-label{display:block;font-size:.82rem;color:var(--ink-soft);margin-top:4px}
.text-green{color:var(--green)}.text-red{color:var(--red)}.text-blue{color:var(--blue)}

/* ---------- Toolbar / search ---------- */
.toolbar{display:flex;gap:10px;margin-bottom:18px;flex-wrap:wrap}
.search-input{flex:1;min-width:220px}
.select{padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;font-size:.95rem;font-family:inherit;color:var(--ink)}

/* ---------- Forms ---------- */
label{display:block;font-size:.88rem;font-weight:600;color:var(--ink);margin:14px 0 5px}
input[type=text],input[type=password],input[type=date],select,textarea{
    width:100%;padding:10px 12px;border:1px solid var(--line);border-radius:var(--radius-sm);
    font-size:.95rem;font-family:inherit;color:var(--ink);background:#fff;transition:.15s
}
input:focus,select:focus,textarea:focus{outline:none;border-color:var(--brand-2);box-shadow:0 0 0 3px rgba(44,82,130,.12)}
textarea{resize:vertical}
.form-card{max-width:760px}
.card-narrow-form{max-width:440px}
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:4px 18px}
.field{margin-bottom:6px}
.field-full{grid-column:1/-1}
.field label{margin-top:8px}
.form-actions{display:flex;gap:10px;margin-top:20px;padding-top:18px;border-top:1px solid var(--line-soft)}

/* ---------- Buttons ---------- */
.btn{display:inline-block;padding:10px 18px;border:1px solid var(--line);border-radius:var(--radius-sm);
    background:#fff;color:var(--ink);font-size:.92rem;font-weight:600;cursor:pointer;transition:.15s;font-family:inherit;text-align:center}
.btn:hover{text-decoration:none;border-color:#cbd5e0;background:#fafbfc}
.btn-primary{background:var(--brand);border-color:var(--brand);color:#fff}
.btn-primary:hover{background:var(--brand-2);border-color:var(--brand-2)}
.btn-danger{background:var(--red);border-color:var(--red);color:#fff}
.btn-danger:hover{background:#9b2c2c;border-color:#9b2c2c}
.btn-ghost{background:transparent;border-color:transparent;color:var(--brand-2)}
.btn-ghost:hover{background:var(--line-soft)}
.btn-block{display:block;width:100%;margin-top:14px}
.btn-sm{padding:6px 12px;font-size:.85rem}

/* ---------- Table ---------- */
.table-wrap{background:#fff;border:1px solid var(--line);border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow)}
.table{width:100%;border-collapse:collapse;font-size:.92rem}
.table thead th{background:#f1f4f8;text-align:left;padding:12px 14px;font-size:.78rem;text-transform:uppercase;letter-spacing:.03em;color:var(--ink-soft);font-weight:700;border-bottom:1px solid var(--line)}
.table td{padding:12px 14px;border-bottom:1px solid var(--line-soft);vertical-align:middle}
.table tbody tr:last-child td{border-bottom:none}
.table tbody tr:hover{background:#fafbfc}
.code-cell{font-size:.82rem;white-space:nowrap}
.nowrap{white-space:nowrap}
.text-center{text-align:center}.text-right{text-align:right}
.small{font-size:.82rem}
.muted{color:var(--ink-soft)}

/* ---------- Badges ---------- */
.badge{display:inline-block;padding:3px 10px;border-radius:20px;font-size:.78rem;font-weight:700}
.badge-green{background:var(--green-bg);color:var(--green)}
.badge-red{background:var(--red-bg);color:var(--red)}
.badge-lg{font-size:.9rem;padding:5px 14px}

/* ---------- Detail view ---------- */
.detail-grid{display:grid;grid-template-columns:1fr 340px;gap:20px;align-items:start}
.detail-status{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding-bottom:16px;border-bottom:1px solid var(--line-soft)}
.detail-table{width:100%;border-collapse:collapse}
.detail-table th{text-align:left;padding:9px 0;color:var(--ink-soft);font-weight:600;font-size:.85rem;width:130px;vertical-align:top}
.detail-table td{padding:9px 0;border-bottom:1px solid var(--line-soft)}
.detail-table tr:last-child td,.detail-table tr:last-child th{border-bottom:none}
.detail-actions{display:flex;gap:10px;margin-top:18px;flex-wrap:wrap}

/* ---------- QR card ---------- */
.qr-card{text-align:center;position:sticky;top:20px}
.qr-box{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:16px;margin:12px 0 16px;display:flex;justify-content:center}
.qr-img{width:100%;max-width:240px;height:auto;display:block}
.qr-url{margin-top:16px;text-align:left}
.url-input{font-size:.78rem;color:var(--ink-soft);cursor:pointer}
.mt{margin-top:12px}

/* ---------- Danger zone ---------- */
.danger-zone{border-color:#f0d0d0;background:#fefbfb}
.inline-form{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.flex-input{flex:1;min-width:200px}

/* ---------- Alerts ---------- */
.alert{padding:12px 16px;border-radius:var(--radius-sm);margin:14px 0;font-size:.92rem;border:1px solid transparent}
.alert-error{background:var(--red-bg);color:var(--red);border-color:#f5c6c6}
.alert-success{background:var(--green-bg);color:var(--green);border-color:#b7e0c6}
.alert-warn{background:var(--amber-bg);color:var(--amber);border-color:#f0e0b0}

/* ---------- Empty ---------- */
.empty{text-align:center;padding:50px 20px;background:#fff;border:1px dashed var(--line);border-radius:var(--radius);color:var(--ink-soft)}
.empty p{margin-bottom:16px}

/* ---------- Footer ---------- */
.footer{text-align:center;padding:24px;color:var(--ink-soft);font-size:.82rem;border-top:1px solid var(--line)}

/* ---------- Responsive ---------- */
@media(max-width:820px){
    .detail-grid{grid-template-columns:1fr}
    .qr-card{position:static}
    .stats{grid-template-columns:repeat(2,1fr)}
    .form-grid{grid-template-columns:1fr}
}

/* ============================================================
   Selector de certificado subido (panel desplegable) + paginador
   ============================================================ */

/* ---------- Badges extra ---------- */
.badge-blue{background:#e6effa;color:var(--blue)}
.badge-amber{background:var(--amber-bg);color:var(--amber)}

/* ---------- Botón "Seleccionar certificado" ---------- */
.cert-btn{cursor:pointer;font-family:inherit;font-size:.95rem}
.cert-btn::after{content:' ▾';font-size:.85em}
.cert-btn[aria-expanded="true"]::after{content:' ▴'}

/* ---------- Resumen del certificado elegido ---------- */
.cert-resumen{
    display:flex;align-items:center;gap:14px;margin-top:12px;
    padding:12px 14px;background:#fff;border:1px solid var(--line);
    border-radius:var(--radius-sm);
}
.cert-resumen-thumb{
    flex:0 0 84px;height:60px;border-radius:6px;overflow:hidden;
    background:var(--line-soft);border:1px solid var(--line);
    display:flex;align-items:center;justify-content:center;
}
.cert-resumen-thumb img{width:100%;height:100%;object-fit:contain;display:block}
.cert-resumen-vacio .cert-resumen-thumb::after{content:'🚫';font-size:1.3rem}
.cert-resumen-info{flex:1;min-width:0;display:flex;flex-direction:column;gap:2px}
.cert-resumen-nombre{
    font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.cert-resumen-meta{font-size:.82rem;color:var(--ink-soft)}

/* ---------- Panel desplegable con la lista ---------- */
.cert-panel{
    margin-top:12px;background:#fff;border:1px solid var(--line);
    border-radius:var(--radius);box-shadow:var(--shadow);overflow:hidden;
}
.cert-panel[hidden]{display:none}
.cert-panel-head{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    flex-wrap:wrap;padding:14px 18px;border-bottom:1px solid var(--line);
    background:#fafbfc;
}
.cert-buscar{
    flex:1;min-width:180px;max-width:320px;padding:8px 12px;
    border:1px solid var(--line);border-radius:var(--radius-sm);
    font-family:inherit;font-size:.9rem;color:var(--ink);background:#fff;
}
.cert-panel-lista{padding:16px 18px;max-height:420px;overflow-y:auto}
.cert-panel-pie{
    display:flex;align-items:center;justify-content:space-between;gap:12px;
    padding:12px 18px;border-top:1px solid var(--line);background:#fafbfc;
}

/* ---------- Tarjetas de certificado ---------- */
.pl-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(230px,1fr));gap:14px}
.pl-card{
    display:flex;flex-direction:column;text-align:left;padding:0;overflow:hidden;
    background:#fff;border:1px solid var(--line);border-radius:var(--radius-sm);
    cursor:pointer;font-family:inherit;transition:.15s;
}
.pl-card:hover{border-color:var(--brand-2);box-shadow:var(--shadow);transform:translateY(-1px)}
.pl-card.seleccionada{border-color:var(--brand);box-shadow:0 0 0 2px rgba(30,58,95,.18)}
.pl-card[hidden]{display:none}
.pl-card-thumb{position:relative;display:block;background:var(--line-soft);aspect-ratio:4/3;overflow:hidden}
.pl-card-thumb img{width:100%;height:100%;object-fit:contain;display:block}
.pl-card-thumb-vacio{display:flex;align-items:center;justify-content:center}
.pl-card-icono{font-size:2rem;opacity:.45}
.pl-card-badge{position:absolute;top:8px;left:8px}
.pl-card-body{display:block;padding:12px 14px}
.pl-card-nombre{
    display:block;font-weight:600;font-size:.95rem;color:var(--ink);
    white-space:nowrap;overflow:hidden;text-overflow:ellipsis;
}
.pl-card-meta{display:block;font-size:.8rem;color:var(--ink-soft);margin-top:2px}

/* ---------- Paginador ---------- */
.paginador{
    display:flex;align-items:center;justify-content:space-between;gap:14px;
    flex-wrap:wrap;margin-top:18px;
}
.paginador-info{font-size:.86rem;color:var(--ink-soft)}
.paginador-btns{display:flex;align-items:center;gap:6px;flex-wrap:wrap}
.pag-btn{
    display:inline-block;min-width:38px;text-align:center;padding:7px 12px;
    border:1px solid var(--line);border-radius:var(--radius-sm);background:#fff;
    color:var(--ink);font-size:.88rem;transition:.15s;
}
a.pag-btn:hover{border-color:var(--brand-2);background:#fafbfc;text-decoration:none}
.pag-activa{background:var(--brand);border-color:var(--brand);color:#fff;font-weight:600}
.pag-off{color:#a0aec0;background:#fafbfc;cursor:default}
.pag-sep{color:var(--ink-soft);padding:0 2px}

@media(max-width:600px){
    .cert-panel-lista{max-height:320px}
    .pl-grid{grid-template-columns:1fr}
    .paginador{justify-content:center}
}