/* ============================================================
   Sistema de Certificados — Instituto Superior Tecnológico Universitario Manuel Lezaeta
   Identidad visual: degradados turquesa → azul petróleo
   (inspirado en Microsoft / Notion / Stripe)

   --azul   (azul petróleo, apoyo):     #164E63
   --azul-2 (turquesa, principal):      #14B8A6
   --turquesa-oscuro (secundario):      #0F766E
   --gris-osc (texto):                  #475569
   --gris-claro (bordes sutiles):       #E2E8F0
   --fondo (gris muy claro):            #F1F5F9
   --blanco:                            #FFFFFF
   ============================================================ */

:root {
    --azul: #164E63;
    --azul-2: #14B8A6;
    --turquesa-oscuro: #0F766E;
    --gris-osc: #475569;
    --gris-claro: #E2E8F0;
    --blanco: #FFFFFF;
    --fondo: #F1F5F9;
    --sidebar-ancho: 250px;

    /* Degradados institucionales */
    --gradiente-principal: linear-gradient(135deg, #14B8A6 0%, #1BC5BD 25%, #1AA7B8 50%, #178AA8 75%, #164E63 100%);
    --gradiente-principal-hover: linear-gradient(135deg, #0F766E 0%, #178AA8 50%, #164E63 100%);
    --gradiente-sidebar: linear-gradient(180deg, #164E63 0%, #0F766E 100%);
    --gradiente-navbar: linear-gradient(90deg, #14B8A6 0%, #0F766E 100%);
    --gradiente-boton: linear-gradient(90deg, #14B8A6, #0F766E);
    --gradiente-boton-hover: linear-gradient(90deg, #0F766E, #164E63);
    --fondo-sistema: linear-gradient(180deg, #ECFEFF 0%, #F8FAFC 40%, #FFFFFF 100%);
}

* { outline-color: var(--azul-2); }

body {
    background: var(--fondo-sistema);
    color: var(--gris-osc);
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    min-height: 100vh;
    position: relative;
}

/* Formas difuminadas de fondo (blobs) — dan profundidad sin distraer */
body::before, body::after {
    content: '';
    position: fixed;
    border-radius: 50%;
    filter: blur(70px);
    z-index: 0;
    pointer-events: none;
}
body::before {
    width: 420px; height: 420px;
    top: -120px; right: -120px;
    background: rgba(20,184,166,.12);
}
body::after {
    width: 380px; height: 380px;
    bottom: -100px; left: -80px;
    background: rgba(22,78,99,.10);
}
.sidebar, .fondo-oscuro { position: relative; z-index: 1; }

/* Fade-in suave para tarjetas de contenido */
@keyframes apareceSuave { from { opacity: 0; transform: translateY(6px); } to { opacity: 1; transform: translateY(0); } }
.card, .tarjeta-kpi { animation: apareceSuave .35s ease both; }

/* ── Barra lateral ─────────────────────────────────────── */
.sidebar {
    width: var(--sidebar-ancho);
    min-height: 100vh;
    background: var(--gradiente-sidebar);
    position: fixed;
    top: 0; left: 0;
    z-index: 1030;
    transition: margin-left .25s ease;
    display: flex;
    flex-direction: column;
}
.sidebar .marca {
    padding: 1.25rem 1rem;
    border-bottom: 1px solid rgba(255,255,255,.14);
    color: var(--blanco);
    text-align: center;
}
.sidebar .marca .logo-circulo {
    width: 56px; height: 56px;
    border-radius: 50%;
    background: var(--blanco);
    color: var(--azul);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 1.15rem;
    letter-spacing: .5px;
    margin-bottom: .5rem;
    box-shadow: 0 4px 14px rgba(0,0,0,.15);
}
.sidebar .marca h6 { font-size: .8rem; margin: 0; line-height: 1.3; font-weight: 600; }
.sidebar .marca small { color: rgba(255,255,255,.68); font-size: .68rem; }

.sidebar .nav-link {
    color: rgba(255,255,255,.85);
    padding: .65rem 1.1rem;
    font-size: .9rem;
    border-left: 3px solid transparent;
    display: flex;
    align-items: center;
    gap: .65rem;
    transition: background-color .2s ease, color .2s ease, border-color .2s ease, padding-left .2s ease;
}
.sidebar .nav-link i { width: 18px; text-align: center; color: var(--blanco); }
.sidebar .nav-link:hover { background: rgba(255,255,255,.1); color: var(--blanco); padding-left: 1.35rem; }
.sidebar .nav-link.activo {
    background: rgba(20,184,166,.25);
    color: var(--blanco);
    border-left-color: #14B8A6;
    font-weight: 600;
}
.sidebar .pie {
    margin-top: auto;
    padding: .9rem 1.1rem;
    border-top: 1px solid rgba(255,255,255,.14);
    color: rgba(255,255,255,.62);
    font-size: .72rem;
}

/* ── Contenido ─────────────────────────────────────────── */
.contenido { margin-left: var(--sidebar-ancho); transition: margin-left .25s ease; }

.barra-superior {
    background: var(--gradiente-navbar);
    border-bottom: none;
    box-shadow: 0 2px 12px rgba(15,118,110,.18);
    padding: .65rem 1.4rem;
    color: var(--blanco);
}
.barra-superior h5 { color: var(--blanco) !important; }
.barra-superior .boton-menu { color: var(--blanco); border-color: rgba(255,255,255,.6); }
.barra-superior .boton-menu:hover { background: rgba(255,255,255,.15); color: var(--blanco); }
.barra-superior .usuario-chip {
    background: rgba(255,255,255,.16);
    border-radius: 2rem;
    padding: .3rem .9rem .3rem .4rem;
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    font-size: .85rem;
    color: var(--blanco);
    transition: background-color .2s ease;
}
.barra-superior .usuario-chip:hover { background: rgba(255,255,255,.26); }
.barra-superior .usuario-chip .avatar {
    width: 30px; height: 30px;
    border-radius: 50%;
    background: var(--blanco);
    color: var(--azul);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: .8rem;
    font-weight: 700;
}

.principal { padding: 1.5rem; }

/* ── Tarjetas de indicadores (Dashboard) ───────────────── */
.tarjeta-kpi {
    border: none;
    border-radius: .875rem;
    box-shadow: 0 1px 3px rgba(22,78,99,.06), 0 6px 18px rgba(22,78,99,.10);
    overflow: hidden;
    transition: transform .2s ease, box-shadow .2s ease;
}
.tarjeta-kpi:hover { transform: translateY(-3px); box-shadow: 0 10px 28px rgba(22,78,99,.16); }
.tarjeta-kpi .icono {
    width: 52px; height: 52px;
    border-radius: .75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.4rem;
    color: var(--blanco);
    box-shadow: 0 4px 12px rgba(22,78,99,.18);
}
/* Degradados distintos dentro de la misma gama turquesa/petróleo, para dar dinamismo */
.kpi-azul  { background: linear-gradient(135deg, #14B8A6, #0F766E); }
.kpi-verde { background: linear-gradient(135deg, #1BC5BD, #14B8A6); }
.kpi-rojo  { background: linear-gradient(135deg, #178AA8, #164E63); }
.kpi-gris  { background: linear-gradient(135deg, #64748b, #475569); }

.tarjeta-kpi h3 { font-weight: 800; color: var(--azul); margin: 0; }
.tarjeta-kpi small { color: var(--gris-osc); text-transform: uppercase; letter-spacing: .4px; font-size: .7rem; }

/* ── Tarjetas y tablas ─────────────────────────────────── */
.card {
    border: none;
    border-radius: .875rem;
    box-shadow: 0 1px 3px rgba(22,78,99,.05), 0 6px 18px rgba(22,78,99,.07);
    position: relative;
    overflow: hidden;
    transition: box-shadow .2s ease;
}
/* Línea superior en degradado turquesa — detalle de identidad visual */
.card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 3px;
    background: var(--gradiente-boton);
}
.card-header {
    background: var(--gradiente-navbar);
    border-bottom: none;
    font-weight: 700;
    color: var(--blanco);
}
.card-header .btn-outline-institucional { color: var(--blanco); border-color: rgba(255,255,255,.7); }
.card-header .btn-outline-institucional:hover { background: rgba(255,255,255,.18); color: var(--blanco); }
.card-header a:not(.btn) { color: var(--blanco); }
.tarjeta-banner::before { display: none; }
.tarjeta-banner { box-shadow: 0 8px 24px rgba(22,78,99,.22); }

.btn-institucional {
    background: var(--gradiente-boton);
    border: none;
    color: var(--blanco);
    box-shadow: 0 3px 10px rgba(15,118,110,.25);
    transition: background .25s ease, box-shadow .2s ease, transform .15s ease;
}
.btn-institucional:hover, .btn-institucional:focus {
    background: var(--gradiente-boton-hover);
    color: var(--blanco);
    box-shadow: 0 5px 16px rgba(15,118,110,.35);
    transform: translateY(-1px);
}
.btn-outline-institucional { color: var(--azul-2); border-color: var(--azul-2); }
.btn-outline-institucional:hover { background: var(--gradiente-boton); color: var(--blanco); border-color: transparent; }
.btn-outline-secondary { color: var(--gris-osc); border-color: var(--gris-claro); }
.btn-outline-secondary:hover { background: var(--gris-claro); color: var(--gris-osc); border-color: var(--gris-claro); }

.table thead th {
    background: var(--azul);
    color: var(--blanco);
    font-size: .8rem;
    text-transform: uppercase;
    letter-spacing: .4px;
    font-weight: 600;
    vertical-align: middle;
    border: none;
}
.table tbody td { font-size: .88rem; vertical-align: middle; border-color: var(--gris-claro); }
.table tbody tr { background: var(--blanco); transition: background-color .15s ease; }
.table-striped > tbody > tr:nth-of-type(odd) > * { background-color: var(--fondo); }
.table-hover > tbody > tr:hover > * { background-color: #eef6f5; }

.badge-valido   { background: #e3f3ec; color: #1e7e54; font-weight: 600; }
.badge-revocado { background: #fde8e8; color: #dc2626; font-weight: 600; }
.badge-rol      { background: #e6f6f4; color: var(--azul); font-weight: 600; }

.form-label { font-weight: 600; color: var(--gris-osc); font-size: .85rem; }
.form-control, .form-select { border-radius: .5rem; border-color: var(--gris-claro); transition: border-color .2s ease, box-shadow .2s ease; }
.form-control:focus, .form-select:focus {
    border-color: var(--azul-2);
    box-shadow: 0 0 0 .2rem rgba(20,184,166,.15);
}
.obligatorio::after { content: " *"; color: #dc2626; }

/* ── Login ─────────────────────────────────────────────── */
.pagina-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background:
        radial-gradient(circle at 20% 15%, rgba(255,255,255,.10), transparent 40%),
        radial-gradient(circle at 85% 85%, rgba(22,78,99,.35), transparent 50%),
        var(--gradiente-principal);
    padding: 1rem;
}
.caja-login {
    width: 100%;
    max-width: 420px;
    border-radius: 1.1rem;
    overflow: hidden;
    box-shadow: 0 20px 55px rgba(0,0,0,.28);
    animation: apareceSuave .4s ease both;
}
.caja-login .cabecera {
    background: var(--blanco);
    text-align: center;
    padding: 2rem 2rem 1rem;
}
.caja-login .cuerpo { background: var(--blanco); padding: 1rem 2rem 2rem; }

/* ── Página pública de verificación ────────────────────── */
.pagina-verificar {
    min-height: 100vh;
    background:
        radial-gradient(circle at 15% 15%, rgba(255,255,255,.10), transparent 40%),
        radial-gradient(circle at 85% 80%, rgba(22,78,99,.3), transparent 50%),
        var(--gradiente-principal);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
}
.tarjeta-verificacion {
    width: 100%;
    max-width: 640px;
    border-radius: 1.1rem;
    overflow: hidden;
    background: var(--blanco);
    box-shadow: 0 20px 60px rgba(0,0,0,.28);
    animation: apareceSuave .4s ease both;
}
.cinta-resultado { padding: 1.6rem; text-align: center; color: var(--blanco); }
.cinta-autentico { background: linear-gradient(135deg, #14B8A6, #1e7e54); }
.cinta-revocado  { background: linear-gradient(135deg, #dc2626, #ef4444); }
.cinta-no-encontrado { background: linear-gradient(135deg, var(--gris-osc), #64748b); }
.cinta-resultado .icono-grande { font-size: 3rem; }
.cinta-resultado h2 { font-weight: 800; letter-spacing: 1px; margin: .4rem 0 0; font-size: 1.5rem; }

/* Borde/detalle de la tarjeta de resultado según el estado del certificado */
.tarjeta-resultado-valido       { border-top: 4px solid var(--azul-2) !important; }
.tarjeta-resultado-anulado      { border-top: 4px solid #dc2626 !important; }
.tarjeta-resultado-no-encontrado{ border-top: 4px solid var(--gris-claro) !important; }
.tarjeta-resultado-valido::before,
.tarjeta-resultado-anulado::before,
.tarjeta-resultado-no-encontrado::before { display: none; }

.detalle-verificacion dt { color: var(--gris-osc); font-size: .75rem; text-transform: uppercase; letter-spacing: .5px; }
.detalle-verificacion dd { font-weight: 600; color: #1e293b; margin-bottom: .85rem; }

.sello-consulta {
    background: var(--fondo);
    border-top: 1px solid var(--gris-claro);
    font-size: .78rem;
    color: var(--gris-osc);
}

/* ── QR modal ──────────────────────────────────────────── */
.qr-marco {
    border: 4px solid var(--azul-2);
    border-radius: .75rem;
    padding: .75rem;
    background: var(--blanco);
    display: inline-block;
}

/* ── Responsive ────────────────────────────────────────── */
.boton-menu { display: none; }

@media (max-width: 991.98px) {
    .sidebar { margin-left: calc(var(--sidebar-ancho) * -1); }
    .sidebar.abierta { margin-left: 0; box-shadow: 6px 0 24px rgba(0,0,0,.25); }
    .contenido { margin-left: 0; }
    .boton-menu { display: inline-flex; }
    .fondo-oscuro {
        position: fixed; inset: 0;
        background: rgba(0,0,0,.45);
        z-index: 1029;
        display: none;
    }
    .fondo-oscuro.visible { display: block; }
}

/* DataTables ajustes */
div.dataTables_wrapper div.dataTables_filter input { border-radius: .375rem; border-color: var(--gris-claro); }
table.dataTable { border-collapse: collapse !important; }