:root{--ink:#172d35;--muted:#54676d;--teal:#006b5e;--line:#dce5e3;--paper:#f4f7f6}*{box-sizing:border-box}body{margin:0;background:var(--paper);color:var(--ink);font-family:system-ui,-apple-system,'Segoe UI',sans-serif}.container{width:min(1160px,calc(100% - 48px));margin:auto}a{color:var(--teal)}a:focus-visible{outline:3px solid #d59627;outline-offset:5px}.site-header{background:#fff;border-bottom:1px solid var(--line)}.header-inner{min-height:100px;display:flex;align-items:center;justify-content:space-between;gap:20px}.brand{display:flex;align-items:center;gap:12px;color:var(--ink);text-decoration:none;font-size:18px;font-weight:750}.brand small{display:block;font-size:9px;letter-spacing:2px;color:var(--muted);margin-top:5px}.brand-icon{display:grid;place-items:center;background:var(--teal);color:#fff;width:44px;height:44px;border-radius:12px;font:700 20px monospace}.header-link{font-size:13px;font-weight:650;text-decoration:none}.public-main{min-height:calc(100vh - 185px);display:grid;grid-template-columns:1.35fr 1fr;gap:70px;align-items:center;padding-top:70px;padding-bottom:70px}.eyebrow{font-size:11px;font-weight:750;letter-spacing:2px;color:var(--teal);margin-bottom:24px}h1{font-size:clamp(34px,4.5vw,58px);line-height:1.12;letter-spacing:-2px;font-weight:800}h1 span{color:var(--teal)}.hero-subtitle{font-size:22px;margin-top:26px}.lead-copy{color:var(--muted);line-height:1.8;max-width:490px}.notice{display:flex;align-items:center;gap:10px;padding:14px 18px;border:1px solid #d3dfd9;border-radius:8px;background:#eaf0eb;font-size:13px;font-weight:650;margin:28px 0 18px;width:fit-content}.status-dot{width:8px;height:8px;background:#8a671a;border-radius:50%;flex-shrink:0}.hero-hint{font-size:13px;line-height:1.8;color:var(--muted);max-width:420px}.surface{background:#fff;border:1px solid var(--line);border-radius:16px;overflow:hidden;box-shadow:0 15px 40px #17362b06}.terminal-bar{height:48px;background:#edf2f0;display:flex;align-items:center;gap:6px;padding:0 20px;border-bottom:1px solid var(--line)}.terminal-bar>span{height:7px;width:7px;border-radius:50%;background:#b6c6bf}.terminal-bar small{margin-left:auto;color:var(--muted);font:11px monospace}.card-content{padding:36px}.large-code{font:700 60px monospace;color:var(--teal);display:block;margin-bottom:30px}.card-content h2{font-size:40px;font-weight:750;letter-spacing:-1px}.card-content p:not(.eyebrow){color:var(--muted);font-size:14px;line-height:1.8;margin:22px 0}.card-status{display:flex;justify-content:space-between;border-top:1px solid var(--line);padding-top:24px;font-size:12px;color:var(--muted)}.card-status strong{color:var(--teal)}.site-footer{display:flex;justify-content:space-between;gap:16px;padding-top:24px;padding-bottom:24px;border-top:1px solid var(--line);font-size:11px;color:var(--muted)}.admin-layout{display:grid;grid-template-columns:205px 1fr;gap:50px;min-height:calc(100vh - 185px);padding-top:42px;padding-bottom:60px}.sidebar nav{display:flex;flex-direction:column;gap:6px}.sidebar nav a{padding:12px 16px;color:var(--muted);text-decoration:none;border-radius:7px;font-size:14px}.sidebar nav a[aria-current]{background:var(--teal);color:#fff}.sidebar nav a:hover{background:#dce9e3;color:var(--ink)}.sidebar-note{border-top:1px solid var(--line);margin-top:36px;padding:20px 16px;font:12px monospace;color:var(--teal)}.sidebar-note span{display:block;margin-top:8px;color:var(--muted)}.admin-main h1{font-size:36px;letter-spacing:-1px}.admin-main .eyebrow{margin-bottom:16px}.placeholder{padding:48px;text-align:center;margin-top:28px}.code-icon{font:36px monospace;color:var(--teal);display:block;margin-bottom:22px}.placeholder h2{font-size:23px}.placeholder p{max-width:470px;margin:16px auto 24px;color:var(--muted);line-height:1.8;font-size:14px}.phase-tag{font-size:11px;color:var(--teal);background:#edf4f0;border-radius:20px;padding:8px 14px;display:inline-block}.skip-link{position:absolute;left:16px;top:-80px;background:white;padding:12px;z-index:5}.skip-link:focus{top:8px}@media(max-width:800px){.public-main{grid-template-columns:1fr;gap:35px;padding-top:42px}.event-card{max-width:500px;width:100%}.admin-layout{grid-template-columns:1fr;gap:26px}.sidebar nav{flex-direction:row;flex-wrap:wrap}.sidebar-note{display:none}.sidebar .eyebrow{margin-bottom:12px}.placeholder{padding:30px 20px}}@media(max-width:480px){.container{width:calc(100% - 32px)}.brand{font-size:13px}.brand small{font-size:8px;letter-spacing:1px}.brand-icon{width:34px;height:34px;font-size:16px}.header-link{font-size:11px}.header-inner{min-height:82px;gap:10px}h1{font-size:clamp(28px,8.4vw,40px);letter-spacing:-1px}.hero-subtitle{font-size:19px}.card-content{padding:26px}.site-footer{flex-direction:column}.notice{font-size:12px}.sidebar nav a{padding:10px;font-size:12px}}
/* Fase 2: formularios y datos administrativos. */
.admin-main{min-width:0}.panel{padding:26px}.panel h2{font-size:22px;margin-bottom:18px}.form-grid{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:18px}.form-actions{display:flex;gap:12px;margin-top:24px;flex-wrap:wrap}.form-hint{font-size:13px;color:var(--muted);line-height:1.7}.form-label{font-weight:600;font-size:13px}.form-control:focus,.form-select:focus{border-color:var(--teal);box-shadow:0 0 0 .2rem #006b5e22}.btn-primary{--bs-btn-bg:#006b5e;--bs-btn-border-color:#006b5e;--bs-btn-hover-bg:#005448;--bs-btn-hover-border-color:#005448;--bs-btn-active-bg:#005448;--bs-btn-active-border-color:#005448}.login-main{min-height:calc(100vh - 185px);display:grid;place-items:center;padding-top:40px;padding-bottom:40px}.login-card{max-width:470px;width:100%;padding:36px}.login-card h1{font-size:30px;letter-spacing:-1px}.metric-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}.metric-value{display:block;font-size:42px;color:var(--teal)}.metric-grid small{color:var(--muted)}.event-facts{display:flex;gap:50px;margin:24px 0}.event-facts dt{font-size:12px;color:var(--muted);margin-bottom:8px}.event-facts dd{margin:0}.search-form{display:flex;gap:10px;margin:22px 0}.table{font-size:13px}.table th{font-size:11px;color:var(--muted);padding-top:14px;padding-bottom:14px}.table td{padding-top:16px;padding-bottom:16px;overflow-wrap:anywhere;max-width:280px}.cell-secondary{display:block;color:var(--muted);margin-top:5px}.row-actions{display:flex;gap:6px;flex-wrap:wrap;min-width:105px}.pagination-bar{display:flex;align-items:center;justify-content:space-between;gap:15px;margin-top:20px;font-size:12px;color:var(--muted)}.empty-state{text-align:center;padding:36px!important;color:var(--muted)!important}.logout-form{padding-left:16px}@media(max-width:600px){.form-grid,.metric-grid{grid-template-columns:1fr}.panel{padding:20px}.login-card{padding:26px}.pagination-bar{align-items:flex-start;flex-direction:column}.search-form{flex-wrap:wrap}.search-form input{flex-basis:100%}.sidebar-note{display:block;margin-top:14px;padding:12px}.logout-form{padding-left:12px}}
/* Importación: vista previa y confirmación. */
.import-toolbar{display:flex;gap:12px;flex-wrap:wrap}.import-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(100px,1fr));gap:16px;margin:24px 0}.import-summary>div{background:#f1f6f3;padding:16px;border-radius:10px;font-size:12px;color:var(--muted)}.import-summary strong{display:block;font-size:28px;color:var(--ink);margin-bottom:6px}.upload-area{border:1px dashed #9cb4a9;border-radius:12px;background:#f5f8f6;padding:24px;margin-top:24px}.import-table{min-width:870px}.validation-status{font-size:11px;font-weight:700;display:inline-block;padding:5px 9px;border-radius:7px;white-space:nowrap}.validation-valid{background:#e2f2e8;color:#145434}.validation-errors{background:#fbe7e7;color:#8d2525}.validation-duplicates{background:#fff1d9;color:#755109}.validation-existing{background:#e9edf2;color:#3a5266}.import-table td:last-child{min-width:190px}@media(max-width:600px){.upload-area{padding:16px}.import-summary{grid-template-columns:repeat(2,minmax(0,1fr))}}
.registration-card{max-width:540px}.registration-trap{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}.student-filters{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:14px;margin:24px 0}.student-filters>div:first-child{grid-column:1/-1}.filter-actions{display:flex;align-items:end}.breakdown-list{list-style:none;margin:0;padding:0}.breakdown-list li{display:flex;justify-content:space-between;gap:16px;border-bottom:1px solid var(--line);padding:10px 0;font-size:14px}.event-facts{flex-wrap:wrap}@media(max-width:500px){.student-filters{grid-template-columns:1fr}.registration-card h1{font-size:28px}}
/* Pantalla de proyección; QR negro sobre blanco, sin logos ni módulos decorativos. */
.qr-projector { text-align: center; }
.qr-image { display: block; width: min(100%, 560px); height: auto; margin: 1rem auto; background: white; }
.qr-image[hidden] { display: none; }
.qr-countdown { font-size: 1.25rem; font-variant-numeric: tabular-nums; }
.visual-panel { margin: 1.5rem 0; padding: 1.5rem 0; border-top: 2px solid #d7e4e1; border-bottom: 2px solid #d7e4e1; }
.visual-code { color: #071d19; background: #fff; font-family: Consolas, "Courier New", monospace; font-weight: 800; font-size: clamp(2.8rem, 9vw, 6rem); letter-spacing: .08em; line-height: 1.2; font-variant-numeric: tabular-nums; }
.visual-code[hidden] { display: none; }
@media (min-width: 1000px) {
    .projector-challenges { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 1fr); align-items: center; gap: 1.25rem; }
    .projector-challenges .visual-panel { border-top: 0; border-bottom: 0; padding: 1rem 0; }
    .projector-challenges .visual-code { font-size: clamp(2.8rem, 5.5vw, 5rem); letter-spacing: .02em; }
}
body.projector-mode .site-header, body.projector-mode .site-footer, body.projector-mode .sidebar,
body.projector-mode .admin-main > :not(.qr-projector) { display: none; }
body.projector-mode .admin-layout { display: block; max-width: 1400px; margin: 0 auto; padding: 1rem; }
body.projector-mode .qr-projector { padding: 1rem; }
/* Fase 10: estilos limitados al dashboard; tablas conservan scroll en móvil. */
.attendance-dashboard .dashboard-section{margin-bottom:22px}
.dashboard-heading{display:flex;justify-content:space-between;gap:20px;align-items:start;flex-wrap:wrap}
.dashboard-filters{display:grid;grid-template-columns:2fr 1fr 1fr auto;gap:14px;align-items:end}
.dashboard-filters label{display:grid;gap:8px;font-size:13px;font-weight:600;min-width:0}
.dashboard-filters select{width:100%;min-width:0;padding:10px;border:1px solid var(--line);border-radius:6px;background:#fff;color:var(--ink)}
.dashboard-filters button{padding:10px 15px;background:var(--teal);color:#fff;border:0;border-radius:6px;font:inherit;cursor:pointer}
.dashboard-metrics{grid-template-columns:repeat(4,minmax(0,1fr));margin-bottom:22px}
.dashboard-metrics .panel{padding:20px}.dashboard-metrics p{font-size:13px;min-height:34px}.dashboard-metrics .metric-value{font-size:32px;font-variant-numeric:tabular-nums}
.attendance-dashboard .table-responsive{overflow-x:auto}.attendance-dashboard table{border-collapse:collapse;width:100%;min-width:630px}
.attendance-dashboard td,.attendance-dashboard th{text-align:left;padding:12px;border-bottom:1px solid var(--line)}
.dashboard-breakdown{padding:12px 0;border-bottom:1px solid var(--line)}.dashboard-breakdown p{font-size:13px;color:var(--muted);margin:8px 0}.dashboard-breakdown progress{width:100%;height:10px;accent-color:var(--teal)}
@media(max-width:1100px){.dashboard-metrics{grid-template-columns:repeat(2,minmax(0,1fr))}.dashboard-filters{grid-template-columns:1fr 1fr}}
@media(max-width:600px){.dashboard-metrics,.dashboard-filters{grid-template-columns:1fr}.dashboard-metrics p{min-height:0}}
/* Fase 11: página de reportes, sin cambiar el dashboard. */
.report-filters{margin:24px 0}.report-filters label{display:grid;gap:8px;font-size:13px;font-weight:600;min-width:0}.report-filters select{width:100%;min-width:0;padding:10px;border:1px solid var(--line);border-radius:6px;background:#fff}.report-filters .filter-actions{gap:16px;flex-wrap:wrap}
.report-downloads{display:flex;gap:12px;flex-wrap:wrap;margin:20px 0}.report-downloads a,.report-filters button{padding:10px 16px;border:0;border-radius:6px;background:var(--teal);color:white;text-decoration:none;font:inherit;cursor:pointer}.report-panel .table-responsive{overflow-x:auto}.report-panel table{width:100%;min-width:900px;border-collapse:collapse}.report-panel td,.report-panel th{padding:12px;text-align:left;border-bottom:1px solid var(--line)}
/* Fase 12: controles administrativos accesibles, sin rediseño general. */
.exception-panel{margin-bottom:24px;min-width:0}.exception-panel form{margin:16px 0}.exception-panel label{display:block;font-size:14px;margin:8px 0;min-width:0}.exception-panel input:not([type=checkbox]),.exception-panel select,.exception-panel textarea{display:block;width:100%;max-width:100%;padding:10px;border:1px solid var(--line);border-radius:6px;background:white;font:inherit;box-sizing:border-box}.exception-panel button{padding:10px 16px;background:var(--teal);color:white;border:0;border-radius:6px;cursor:pointer}.exception-action{padding:16px;border:1px solid var(--line);border-radius:8px;max-width:650px}.exception-panel .exception-confirm{display:flex;gap:10px;align-items:flex-start}.exception-session{margin:20px 0;padding:16px 0;border-top:1px solid var(--line)}.exception-panel .table-responsive{overflow-x:auto}.exception-panel table{width:100%;border-collapse:collapse}.exception-panel td,.exception-panel th{padding:12px;text-align:left;border-bottom:1px solid var(--line);overflow-wrap:anywhere}.exception-panel h4,.exception-panel p{overflow-wrap:anywhere}