:root {
    --primary: #c41e3a;
    --primary-dark: #9a1830;
    --bg: #0f1115;
    --surface: #1a1d24;
    --text: #f5f5f5;
    --muted: #9ca3af;
    --success: #22c55e;
    --error: #ef4444;
    --radius: 12px;
    --font: 'Segoe UI', system-ui, sans-serif;
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

.container { max-width: 1100px; margin: 0 auto; padding: 0 1.25rem; }

.site-header {
    background: rgba(15, 17, 21, 0.95);
    border-bottom: 1px solid #2a2f3a;
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 10;
}

.logo {
    color: var(--text);
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
}
.logo span { color: var(--primary); }

.hero {
    padding: 4rem 0 3rem;
    background: linear-gradient(135deg, #1a1020 0%, #0f1115 50%, #0f1a20 100%);
}

.hero-grid {
    display: grid;
    gap: 2.5rem;
    align-items: start;
}
@media (min-width: 900px) {
    .hero-grid { grid-template-columns: 1fr 400px; }
}

.eyebrow {
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.75rem;
    font-weight: 600;
}

.hero h1 { font-size: clamp(2rem, 5vw, 3rem); line-height: 1.15; margin: 0.5rem 0; }
.hero-meta { color: var(--muted); margin-bottom: 1rem; }
.hero-desc { color: #d1d5db; max-width: 520px; }

.register-card, .form {
    background: var(--surface);
    border: 1px solid #2a2f3a;
    border-radius: var(--radius);
    padding: 1.75rem;
}

.register-card h2 { margin-bottom: 0.5rem; }
.register-card p { color: var(--muted); font-size: 0.9rem; margin-bottom: 1.25rem; }

.form label {
    display: block;
    margin-bottom: 1rem;
    font-size: 0.875rem;
    color: var(--muted);
}

.form input[type="text"],
.form input[type="email"],
.form input[type="tel"],
.form input[type="password"],
.form input[type="url"] {
    display: block;
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.75rem 1rem;
    border: 1px solid #3a4150;
    border-radius: 8px;
    background: #0f1115;
    color: var(--text);
    font-size: 1rem;
}

.form input:focus {
    outline: 2px solid var(--primary);
    border-color: transparent;
}

.btn {
    display: inline-block;
    padding: 0.85rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    font-size: 0.95rem;
    text-align: center;
}

.btn-primary { background: var(--primary); color: #fff; width: 100%; }
.btn-primary:hover { background: var(--primary-dark); }
.btn-secondary { background: #2a2f3a; color: var(--text); }

.calendar-download-page {
    max-width: 420px;
    margin: 2rem auto 3rem;
    text-align: center;
}
.calendar-download-page .access-code {
    font-size: 1.1rem;
    letter-spacing: 0.15em;
    margin: 1.5rem 0;
}
.calendar-download-page .btn-download {
    margin: 1.5rem 0;
}
.calendar-download-page .small {
    color: var(--muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.features {
    display: grid;
    gap: 1.5rem;
    padding: 3rem 0 4rem;
}
@media (min-width: 768px) {
    .features { grid-template-columns: repeat(3, 1fr); }
}
.features article {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius);
    border: 1px solid #2a2f3a;
}
.features h3 { color: var(--primary); margin-bottom: 0.5rem; }

.alert {
    padding: 1rem 1.25rem;
    border-radius: 8px;
    margin: 1rem auto;
    max-width: 1100px;
}
.alert-success { background: rgba(34, 197, 94, 0.15); border: 1px solid var(--success); }
.alert-warning { background: rgba(245, 158, 11, 0.15); border: 1px solid #f59e0b; color: #fcd34d; }
.alert-error { background: rgba(239, 68, 68, 0.15); border: 1px solid var(--error); }

.table-wrap { overflow-x: auto; margin-top: 1rem; }
.admin-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.875rem;
    background: var(--surface);
    border-radius: var(--radius);
    overflow: hidden;
}
.admin-table th,
.admin-table td {
    padding: 0.65rem 0.75rem;
    border-bottom: 1px solid #2a2f3a;
    text-align: left;
    vertical-align: top;
}
.admin-table th { color: var(--muted); font-weight: 600; }
.admin-table tr:hover td { background: rgba(255, 255, 255, 0.03); }
.code-badge {
    font-family: ui-monospace, monospace;
    font-weight: bold;
    color: var(--primary);
    letter-spacing: 0.1em;
}
.badge {
    display: inline-block;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-ok { background: rgba(34, 197, 94, 0.2); color: var(--success); }
.badge-error { background: rgba(239, 68, 68, 0.2); color: var(--error); }
.badge-muted { background: #2a2f3a; color: var(--muted); }
.email-status-cell { max-width: 220px; }
.email-error-text {
    display: block;
    margin-top: 0.35rem;
    font-size: 0.7rem;
    color: #fca5a5;
    line-height: 1.35;
}

.site-footer {
    border-top: 1px solid #2a2f3a;
    padding: 2rem 0;
    color: var(--muted);
    font-size: 0.875rem;
    text-align: center;
}

.onsite-section { padding: 3rem 0; }
.onsite-grid { display: grid; gap: 2rem; margin-top: 2rem; }
@media (min-width: 768px) { .onsite-grid { grid-template-columns: 1fr 280px; } }
.qr-print { text-align: center; background: var(--surface); padding: 1.5rem; border-radius: var(--radius); }
.qr-large { max-width: 280px; margin: 1.5rem 0; }
.access-code-display {
    font-size: 2.5rem;
    font-weight: bold;
    letter-spacing: 0.35em;
    color: var(--primary);
    font-family: ui-monospace, monospace;
    margin: 1rem 0;
}
.text-center { text-align: center; }
.small { font-size: 0.8rem; color: var(--muted); }

/* Admin */
.admin-body { min-height: 100vh; }
.login-hint {
    font-size: 0.85rem;
    color: var(--muted);
    margin-bottom: 1rem;
    padding: 0.75rem;
    background: #0f1115;
    border-radius: 8px;
}

.admin-login-box {
    max-width: 400px;
    margin: 10vh auto;
    padding: 2rem;
    background: var(--surface);
    border-radius: var(--radius);
    border: 1px solid #2a2f3a;
}
.admin-nav {
    background: var(--surface);
    border-bottom: 1px solid #2a2f3a;
    padding: 0.75rem 0;
}
.admin-nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.admin-nav a {
    color: var(--muted);
    text-decoration: none;
    margin-left: 1rem;
}
.admin-nav a:hover { color: var(--text); }
.admin-main { padding: 2rem 0 4rem; }
.subtitle { color: var(--muted); margin-bottom: 2rem; }

.stats-grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--surface);
    border: 1px solid #2a2f3a;
    border-radius: var(--radius);
    padding: 1.5rem;
}
.stat-card.highlight { border-color: var(--primary); }
.stat-label { display: block; color: var(--muted); font-size: 0.85rem; }
.stat-value { font-size: 2rem; color: var(--text); }
.admin-actions { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 2rem; }
.admin-form { max-width: 600px; }
.admin-form h2 { margin: 1.5rem 0 0.75rem; font-size: 1rem; color: var(--primary); }
.settings-list { margin: 0.5rem 0 1rem 1.25rem; color: var(--muted); }
.settings-list li { margin-bottom: 0.35rem; }
.test-mail-info {
    background: var(--surface);
    border: 1px solid #2a2f3a;
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1.25rem;
    font-size: 0.9rem;
}
.test-mail-info p { margin: 0.35rem 0; }
.test-mail-info code { color: #93c5fd; }
.api-key { word-break: break-all; display: block; margin-top: 0.5rem; padding: 0.5rem; background: #0f1115; }

/* Scanner QR (admin) */
.scanner-page { overflow-x: hidden; }
.scanner-main { padding-bottom: 2rem; }
.scanner-header { padding: 1.25rem 0 0.5rem; text-align: center; }
.scanner-header h1 { font-size: 1.5rem; }
.scanner-hint { font-size: 0.8rem; color: var(--muted); margin-top: 0.5rem; }

.qr-reader-wrap {
    max-width: 480px;
    margin: 0 auto;
    background: #000;
    border-radius: var(--radius);
    overflow: hidden;
    min-height: 360px;
    position: relative;
    isolation: isolate;
}
/* Contener el sombreado de html5-qrcode dentro del visor (no pantalla completa) */
.qr-reader-wrap #qr-reader {
    width: 100% !important;
    border: none !important;
}
.qr-reader-wrap #qr-reader video {
    border-radius: var(--radius);
    max-width: 100% !important;
}
.qr-reader-wrap #qr-reader__scan_region,
.qr-reader-wrap #qr-reader__dashboard {
    position: relative !important;
}
.qr-reader-wrap #qr-reader img[alt="Info icon"] {
    display: none !important;
}

/* Oculto por defecto — NO usar solo [hidden] con display:flex en CSS */
.scan-result {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 100;
    align-items: center;
    justify-content: center;
    background: rgba(0, 0, 0, 0.75);
    padding: 1.5rem;
    cursor: pointer;
}
.scan-result.is-visible {
    display: flex;
}
.scan-result-inner {
    text-align: center;
    padding: 2rem 2.5rem;
    border-radius: var(--radius);
    max-width: 360px;
    width: 100%;
    cursor: default;
}
.scan-result-hint {
    display: block;
    margin-top: 1rem;
    font-size: 0.75rem;
    color: #9ca3af;
}
.scan-result--success .scan-result-inner { background: #14532d; border: 2px solid var(--success); }
.scan-result--warning .scan-result-inner { background: #713f12; border: 2px solid #f59e0b; }
.scan-result--error .scan-result-inner { background: #7f1d1d; border: 2px solid var(--error); }

.result-icon {
    display: block;
    font-size: 3rem;
    font-weight: bold;
    margin-bottom: 0.5rem;
}
.scan-result h2 { font-size: 1.35rem; margin-bottom: 0.35rem; }
.result-detail { font-size: 0.85rem; color: #d1d5db; margin-top: 0.5rem; }

.scanner-controls {
    margin-top: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    max-width: 480px;
}
.scanner-controls .btn { width: 100%; }
.manual-scan input {
    display: block;
    width: 100%;
    margin-top: 0.35rem;
    padding: 0.65rem;
    border-radius: 8px;
    border: 1px solid #3a4150;
    background: var(--surface);
    color: var(--text);
}

.scanner-log {
    margin-top: 1.5rem;
    max-width: 480px;
    font-size: 0.8rem;
}
.log-entry {
    padding: 0.4rem 0;
    border-bottom: 1px solid #2a2f3a;
    color: var(--muted);
}
.log-success { color: var(--success); }
.log-warning { color: #f59e0b; }
.log-error { color: var(--error); }

@media (min-width: 768px) {
    .admin-nav a.scanner-nav-highlight { color: var(--primary); font-weight: 600; }
}