:root {
    --sidebar-bg: #1f2d3d;
    --sidebar-text: #b6c2cf;
    --sidebar-active: #2f7edb;

    --bg: #eef1f5;
    --card-bg: #ffffff;
    --border: #e2e6ea;

    --blue: #2f7edb;
    --blue-deep: #2564b3;
    --gray: #79879a;
    --gray-deep: #62707f;
    --teal: #17a2b8;
    --teal-deep: #12839a;
    --navy-dark: #16212e;
    --navy-dark-deep: #0e1620;

    --text: #2c3e50;
    --text-dim: #64748b;
    --text-mute: #94a3b8;

    --verde: #16a34a;
    --rojo: #e11d48;
    --amarillo: #d97706;
}

* { box-sizing: border-box; }
body { margin: 0; font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif; background: var(--bg); color: var(--text); }

/* ===== Login ===== */
.login-body { display:flex; align-items:center; justify-content:center; min-height:100vh; background: var(--bg); }
.login-card { background:var(--card-bg); border:1px solid var(--border); padding:36px 30px; border-radius:14px;
    width:100%; max-width:340px; box-shadow:0 10px 30px rgba(20,30,45,.08); display:flex; flex-direction:column; }
.login-logo { display:flex; justify-content:center; margin-bottom:14px; }
.login-logo .logo-mark { width:56px; height:56px; border-radius:14px; background:linear-gradient(135deg, var(--blue), var(--teal));
    color:#fff; font-weight:800; font-size:1.3em; display:flex; align-items:center; justify-content:center; }
.login-header { text-align:center; margin-bottom:6px; }
.login-header h1 { margin:0; font-size:1.4em; color:var(--text); }
.login-card .tagline { text-align:center; color:var(--text-dim); margin:0; font-size:0.85em; text-transform:uppercase; letter-spacing:0.5px; }
.login-card .subtitle { text-align:center; color:var(--text-mute); margin:14px 0 16px; font-size:0.9em; }
.login-card label { font-weight:600; font-size:0.85em; margin-top:10px; color:var(--text-dim); }
.login-card input { padding:11px; border:1px solid var(--border); border-radius:8px; margin-top:4px; font-size:1em;
    background:#fff; color:var(--text); }
.login-card input:focus { outline:none; border-color:var(--blue); }
.login-card button { margin-top:20px; background:var(--blue); color:#fff; border:none; padding:12px; border-radius:8px;
    font-size:1em; font-weight:600; cursor:pointer; }
.login-card button:hover { background:var(--blue-deep); }

/* ===== Layout con sidebar ===== */
.app-shell { display:flex; min-height:100vh; align-items:flex-start; }

.sidebar { width:230px; background:var(--sidebar-bg); min-height:100vh;
    display:flex; flex-direction:column; padding:20px 14px; flex-shrink:0; }
.sidebar-logo { display:flex; align-items:center; gap:10px; padding:6px 8px 22px; color:#fff; font-weight:800; font-size:1.05em; line-height:1.3; }
.sidebar-logo .logo-mark { width:34px; height:34px; border-radius:9px; background:linear-gradient(135deg, var(--blue), var(--teal));
    display:flex; align-items:center; justify-content:center; font-size:0.85em; flex-shrink:0; }
.sidebar-logo .logo-sub { display:block; font-size:0.62em; font-weight:500; color:var(--sidebar-text); letter-spacing:0.3px; text-transform:uppercase; margin-top:2px; }
.sidebar-nav { display:flex; flex-direction:column; gap:3px; }
.sidebar-nav a { display:flex; align-items:center; gap:12px; padding:11px 14px; border-radius:8px; color:var(--sidebar-text); text-decoration:none; font-size:0.9em; }
.sidebar-nav a:hover { background:rgba(255,255,255,.06); color:#fff; }
.sidebar-nav a.active { background:var(--sidebar-active); color:#fff; }
.sidebar-nav a.nav-logout { margin-top:16px; border-top:1px solid rgba(255,255,255,.1); padding-top:16px; color:#f0a5a5; }
.sidebar-nav .icon { font-size:1.05em; width:18px; text-align:center; }

.main-area { flex:1; padding:22px 28px 60px; min-width:0; }
.topbar { display:flex; align-items:flex-start; justify-content:space-between; gap:16px; margin-bottom:22px; flex-wrap:wrap; }
.page-title { margin:0; font-size:1.5em; color:var(--text); font-weight:700; }
.breadcrumb { color:var(--text-mute); font-size:0.85em; margin-top:4px; }
.user-chip { display:flex; align-items:center; gap:10px; font-size:0.9em; font-weight:600; color:var(--text); background:#fff;
    border:1px solid var(--border); padding:6px 14px 6px 6px; border-radius:30px; }
.user-chip .avatar { width:32px; height:32px; border-radius:50%; background:var(--blue); color:#fff;
    display:flex; align-items:center; justify-content:center; font-weight:700; flex-shrink:0; font-size:0.85em; }

/* ===== Tarjetas de estadísticas (estilo SIS ASISTENCIA) ===== */
.stats-row { display:grid; grid-template-columns:repeat(auto-fit, minmax(200px,1fr)); gap:18px; margin-bottom:24px; }
.stat-card { border-radius:10px; overflow:hidden; color:#fff; box-shadow:0 4px 14px rgba(20,30,45,.08); }
.stat-card .stat-body { padding:18px 20px 14px; }
.stat-card .stat-value { font-size:2.1em; font-weight:800; line-height:1; }
.stat-card .stat-label { font-size:0.95em; margin-top:6px; opacity:.92; }
.stat-card .stat-footer { padding:8px 20px; background:rgba(0,0,0,.12); font-size:0.82em; display:flex; align-items:center; justify-content:space-between; }
.stat-card .stat-footer a { color:#fff; text-decoration:none; }
.stat-card.c-blue  { background:var(--blue); }
.stat-card.c-gray  { background:var(--gray); }
.stat-card.c-teal  { background:var(--teal); }
.stat-card.c-navy  { background:var(--navy-dark); }
.stat-card.c-rojo  { background:var(--rojo); }

/* ===== Paneles de gráficos / contenido ===== */
.panel-box { background:var(--card-bg); border:1px solid var(--border); border-radius:10px; overflow:hidden; margin-bottom:24px;
    box-shadow:0 2px 8px rgba(20,30,45,.05); }
.panel-header { padding:12px 18px; color:#fff; font-weight:600; font-size:0.98em; display:flex; align-items:center; justify-content:space-between; }
.panel-header.h-teal { background:var(--teal); }
.panel-header.h-blue { background:var(--blue); }
.panel-body { padding:20px; }

.grid-2 { display:grid; grid-template-columns:1fr 1fr; gap:22px; }
@media (max-width: 960px) { .grid-2 { grid-template-columns:1fr; } }

.panel-box .table { box-shadow:none; background:transparent; border:none; }
.panel-box .table th { background:transparent; color:var(--text-mute); font-weight:600; font-size:0.8em; text-transform:uppercase; }

@media (max-width: 840px) {
    .app-shell { flex-direction:column; }
    .sidebar { width:100%; min-height:auto; flex-direction:row; align-items:center; padding:12px 14px; overflow-x:auto; }
    .sidebar-logo { padding:0 14px 0 0; flex-shrink:0; }
    .sidebar-logo .logo-sub { display:none; }
    .sidebar-nav { flex-direction:row; gap:4px; }
    .sidebar-nav a { flex-direction:column; gap:2px; font-size:0.68em; padding:8px 10px; white-space:nowrap; }
    .sidebar-nav a.nav-logout { margin-top:0; border-top:none; padding-top:8px; }
    .main-area { padding:16px; }
}

.container { max-width:1100px; margin:0 auto; padding:24px 16px; }

.header-row { display:flex; justify-content:space-between; align-items:center; flex-wrap:wrap; gap:12px; margin-bottom:16px; }

.btn { background:var(--blue); color:#fff !important; border:none; padding:10px 18px; border-radius:8px; text-decoration:none; cursor:pointer; font-size:0.95em; display:inline-block; font-weight:600; }
.btn:hover { background:var(--blue-deep); }
.btn.small { padding:6px 12px; font-size:0.85em; }

.table { width:100%; border-collapse:collapse; background:var(--card-bg); border:1px solid var(--border); border-radius:8px; overflow:hidden; }
.table th, .table td { padding:12px 14px; text-align:left; border-bottom:1px solid var(--border); font-size:0.92em; color:var(--text); }
.table th { background:#f8fafc; font-weight:600; color:var(--text-dim); }
.table .acciones a { margin-right:12px; color:var(--blue); text-decoration:none; font-size:0.9em; }

.badge { padding:3px 10px; border-radius:20px; font-size:0.8em; font-weight:600; }
.badge-ok   { background:rgba(22,163,74,.12);  color:var(--verde); }
.badge-warn { background:rgba(217,119,6,.12);  color:var(--amarillo); }
.badge-off  { background:rgba(225,29,72,.12);  color:var(--rojo); }
.badge-mute { background:rgba(121,135,154,.14); color:var(--gray-deep); }
.badge-mute { background:rgba(121,135,154,.15); color:var(--gray-deep); }

.alert { padding:12px 16px; border-radius:8px; margin-bottom:16px; font-size:0.95em; }
.alert-success { background:rgba(22,163,74,.1); color:var(--verde); border:1px solid rgba(22,163,74,.3); }
.alert-error   { background:rgba(225,29,72,.1); color:var(--rojo); border:1px solid rgba(225,29,72,.3); }
.alert-info    { background:rgba(47,126,219,.1); color:var(--blue-deep); border:1px solid rgba(47,126,219,.3); }

.card-form { background:var(--card-bg); border:1px solid var(--border); padding:22px; border-radius:12px; display:flex; flex-direction:column; gap:6px; }
.card-form label { font-weight:600; margin-top:10px; font-size:0.9em; color:var(--text-dim); }
.card-form input[type=text], .card-form input[type=password], .card-form input[type=number],
.card-form input[type=datetime-local], .card-form select {
    padding:10px; border:1px solid var(--border); border-radius:8px; font-size:1em; width:100%;
    background:#fff; color:var(--text);
}
.card-form input:focus, .card-form select:focus { outline:none; border-color:var(--blue); }
.card-form small { color:var(--text-mute); }
.acciones-form { margin-top:18px; display:flex; align-items:center; gap:16px; }
.acciones-form a { color:var(--text-mute); text-decoration:none; }

@media (max-width: 600px) {
    .table, .table thead, .table tbody, .table th, .table td, .table tr { display:block; }
    .table thead { display:none; }
    .table tr { margin-bottom:12px; border:1px solid var(--border); border-radius:8px; overflow:hidden; }
    .table td { border-bottom:none; border-top:1px solid var(--border); }
    .table td:first-child { border-top:none; font-weight:600; }
}