:root {
    --azul-oscuro: #101d3f;
    --azul-oscuro-2: #16224a;
    --azul-acento: #2563eb;
    --gris-fondo: #f4f6fb;
    --gris-borde: #e5e9f2;
    --texto-principal: #1c2333;
    --texto-secundario: #6b7385;
    --verde: #16a34a;
    --verde-bg: #e8f8ee;
    --amarillo: #b8860b;
    --amarillo-bg: #fdf3d8;
    --rojo: #dc2626;
    --rojo-bg: #fdeaea;
    --radio: 10px;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background: var(--gris-fondo);
    color: var(--texto-principal);
    font-size: 14px;
}

a { color: inherit; text-decoration: none; }

.app-shell {
    display: flex;
    min-height: 100vh;
}

/* ---- Sidebar ---- */
.sidebar {
    width: 230px;
    flex-shrink: 0;
    background: linear-gradient(180deg, var(--azul-oscuro) 0%, var(--azul-oscuro-2) 100%);
    color: #cdd6ec;
    padding: 22px 0;
}
.sidebar .brand {
    padding: 0 20px 20px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 14px;
}
.sidebar .brand .brand-eyebrow {
    font-size: 10px;
    letter-spacing: 1.5px;
    color: #f4b93a;
    font-weight: 700;
    margin-bottom: 4px;
}
.sidebar .brand .brand-title {
    font-size: 17px;
    font-weight: 800;
    color: #fff;
    line-height: 1.25;
}
.sidebar .nav-section {
    font-size: 10.5px;
    letter-spacing: 1.2px;
    color: #6f7fa8;
    padding: 16px 20px 6px 20px;
    font-weight: 700;
}
.sidebar .nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    font-size: 14px;
    color: #cdd6ec;
    border-left: 3px solid transparent;
    transition: background .15s ease;
}
.sidebar .nav-item:hover { background: rgba(255,255,255,0.06); color: #fff; }
.sidebar .nav-item.active {
    background: rgba(37,99,235,0.18);
    border-left-color: var(--azul-acento);
    color: #fff;
    font-weight: 600;
}
.sidebar .nav-icon { width: 16px; text-align: center; opacity: .9; }

/* ---- Main ---- */
.main {
    flex: 1;
    min-width: 0;
}
.topbar {
    background: #fff;
    border-bottom: 1px solid var(--gris-borde);
    padding: 16px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.topbar h1 {
    font-size: 20px;
    margin: 0;
    font-weight: 700;
}
.topbar .user-menu {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 13.5px;
}
.topbar .user-menu a.cambiar-clave { color: var(--azul-acento); font-weight: 600; }
.topbar .user-menu a.salir { color: var(--rojo); font-weight: 600; }

.content { padding: 24px 28px 60px 28px; }

/* ---- Cards ---- */
.cards-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 18px;
    margin-bottom: 22px;
}
.card {
    background: #fff;
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 18px 20px;
    display: block;
    transition: border-color .15s ease, transform .1s ease;
}
a.card:hover { border-color: var(--azul-acento); transform: translateY(-2px); }
.card .card-label {
    font-size: 12.5px;
    color: var(--texto-secundario);
    margin-bottom: 6px;
}
.card .card-value {
    font-size: 28px;
    font-weight: 800;
}

.panel-row {
    display: grid;
    grid-template-columns: 1.3fr 1fr;
    gap: 18px;
    margin-bottom: 22px;
}
@media (max-width: 900px) { .panel-row { grid-template-columns: 1fr; } }

.panel {
    background: #fff;
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 18px 20px;
}
.panel h3 {
    font-size: 14.5px;
    margin: 0 0 14px 0;
    display: flex;
    align-items: center;
    gap: 8px;
}
.panel h3 .icon-warn { color: #d97706; }

table.tabla {
    width: 100%;
    border-collapse: collapse;
    font-size: 13.5px;
}
table.tabla th {
    text-align: left;
    color: var(--texto-secundario);
    font-weight: 600;
    padding: 8px 10px;
    border-bottom: 1px solid var(--gris-borde);
    font-size: 11.5px;
    letter-spacing: .4px;
    text-transform: uppercase;
}
table.tabla td {
    padding: 10px 10px;
    border-bottom: 1px solid #f0f2f8;
    vertical-align: middle;
}
table.tabla tr:last-child td { border-bottom: none; }
table.tabla tr:hover td { background: #fafbff; }

.chip {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 999px;
    font-size: 11.5px;
    font-weight: 700;
}
.chip-amarillo { background: var(--amarillo-bg); color: var(--amarillo); }
.chip-rojo { background: var(--rojo-bg); color: var(--rojo); }
.chip-verde { background: var(--verde-bg); color: var(--verde); }

.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 6px;
    font-size: 11.5px;
    font-weight: 700;
    text-transform: capitalize;
}
.badge-success { background: var(--verde-bg); color: var(--verde); }
.badge-warning { background: var(--amarillo-bg); color: var(--amarillo); }
.badge-secondary { background: #eef0f6; color: var(--texto-secundario); }

.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}
.section-header h3 { margin: 0; font-size: 15px; }

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 16px;
    border-radius: 8px;
    font-size: 13.5px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
}
.btn-primary { background: var(--azul-oscuro); color: #fff; }
.btn-primary:hover { background: var(--azul-oscuro-2); }
.btn-outline { background: #fff; border-color: var(--gris-borde); color: var(--texto-principal); }
.btn-outline:hover { border-color: var(--azul-acento); color: var(--azul-acento); }
.btn-danger { background: var(--rojo-bg); color: var(--rojo); }
.btn-sm { padding: 6px 12px; font-size: 12.5px; }
.btn-verde { background: var(--verde-bg); color: var(--verde); }

/* ---- Forms ---- */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 16px;
}
.form-group { display: flex; flex-direction: column; gap: 6px; margin-bottom: 14px; }
.form-group label { font-size: 12.5px; font-weight: 600; color: var(--texto-secundario); }
.form-control, select.form-control, textarea.form-control {
    padding: 9px 12px;
    border: 1px solid var(--gris-borde);
    border-radius: 8px;
    font-size: 13.5px;
    font-family: inherit;
    background: #fff;
}
.form-control:focus { outline: none; border-color: var(--azul-acento); }
fieldset.form-section {
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 16px 18px;
    margin-bottom: 18px;
}
fieldset.form-section legend {
    padding: 0 8px;
    font-weight: 700;
    font-size: 13.5px;
    color: var(--azul-oscuro);
}

.filtros-bar {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    align-items: flex-end;
    background: #fff;
    border: 1px solid var(--gris-borde);
    border-radius: var(--radio);
    padding: 14px 16px;
    margin-bottom: 18px;
}
.filtros-bar .form-group { margin-bottom: 0; min-width: 160px; }

.alert {
    padding: 12px 16px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 13.5px;
}
.alert-success { background: var(--verde-bg); color: var(--verde); }
.alert-danger { background: var(--rojo-bg); color: var(--rojo); }
.alert-info { background: #e8f0fd; color: var(--azul-acento); }

/* ---- Login ---- */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: radial-gradient(circle at top left, #16224a, #0a1330 65%);
}
.login-card {
    background: #fff;
    border-radius: 16px;
    padding: 40px 38px 34px 38px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 30px 60px rgba(0,0,0,0.35);
    text-align: center;
}
.login-card img.logo { max-width: 260px; margin-bottom: 22px; }
.login-card h2 { font-size: 16px; color: var(--texto-secundario); font-weight: 500; margin: 0 0 22px 0; }
.login-card .form-group { text-align: left; }
.login-card .btn-primary { width: 100%; justify-content: center; padding: 11px; margin-top: 6px; }
.login-card .links { margin-top: 16px; font-size: 12.5px; }
.login-card .links a { color: var(--azul-acento); }

/* ---- Modal (popup vencimientos) ---- */
.modal-overlay {
    position: fixed; inset: 0; background: rgba(10,15,35,0.55);
    display: flex; align-items: center; justify-content: center;
    z-index: 999;
}
.modal-box {
    background: #fff; border-radius: 14px; padding: 26px 28px; max-width: 420px; width: 90%;
    box-shadow: 0 20px 50px rgba(0,0,0,.3);
}
.modal-box h4 { margin: 0 0 10px 0; font-size: 16px; display:flex; align-items:center; gap:8px; }
.modal-box p { color: var(--texto-secundario); font-size: 13.5px; line-height: 1.5; }
.modal-box .modal-actions { text-align: right; margin-top: 16px; }

.tabla-actions { display: flex; gap: 8px; }

.link-vermas { color: var(--azul-acento); font-weight: 600; font-size: 12.5px; cursor:pointer; }

.detalle-extra { display:none; background:#fafbff; }
.detalle-extra td { padding: 14px 20px; }
.detalle-grid { display:grid; grid-template-columns: repeat(auto-fit,minmax(180px,1fr)); gap:8px 20px; font-size:12.5px; }
.detalle-grid b { display:block; color:var(--texto-secundario); font-weight:600; font-size:11px; text-transform:uppercase; letter-spacing:.3px; }

.tabs { display:flex; gap:4px; border-bottom:1px solid var(--gris-borde); margin-bottom:18px; }
.tabs a { padding:10px 16px; font-size:13.5px; font-weight:600; color:var(--texto-secundario); border-bottom:2px solid transparent; }
.tabs a.active { color: var(--azul-acento); border-color: var(--azul-acento); }

.text-right { text-align: right; }
.text-muted { color: var(--texto-secundario); }
.mb-0 { margin-bottom: 0; }