:root {
    --azul: #1d4ed8;
    --azul-oscuro: #1e3a8a;
    --gris-fondo: #f3f4f6;
    --verde: #16a34a;
    --rojo: #dc2626;
    --texto: #1f2937;
}

* { box-sizing: border-box; }

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

/* ---------- Login ---------- */
.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--azul-oscuro), var(--azul));
}

.login-card {
    background: #fff;
    padding: 2.5rem;
    border-radius: 12px;
    width: 100%;
    max-width: 380px;
    box-shadow: 0 10px 30px rgba(0,0,0,.2);
}

.login-card h1 {
    margin: 0 0 .25rem;
    color: var(--azul-oscuro);
}

.subtitle {
    margin: 0 0 1.5rem;
    color: #6b7280;
    font-size: .9rem;
}

.login-card form {
    display: flex;
    flex-direction: column;
    gap: .35rem;
}

.login-card label {
    font-size: .85rem;
    font-weight: 600;
    margin-top: .5rem;
}

.login-card input {
    padding: .6rem .75rem;
    border: 1px solid #d1d5db;
    border-radius: 8px;
    font-size: 1rem;
}

.login-card button {
    margin-top: 1.25rem;
    padding: .7rem;
    border: none;
    border-radius: 8px;
    background: var(--azul);
    color: #fff;
    font-weight: 600;
    cursor: pointer;
}

.login-card button:hover { background: var(--azul-oscuro); }

.demo-hint {
    margin-top: 1rem;
    font-size: .8rem;
    color: #6b7280;
    text-align: center;
}

.alert {
    padding: .6rem .8rem;
    border-radius: 8px;
    font-size: .85rem;
    margin-bottom: .5rem;
}

.alert-error { background: #fee2e2; color: var(--rojo); }
.alert-success { background: #dcfce7; color: var(--verde); }

/* ---------- Layout general (dashboard y demás pantallas) ---------- */
.layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 220px;
    background: #fff;
    border-right: 1px solid #e5e7eb;
    padding: 1.25rem;
}

.sidebar .brand { font-weight: 700; color: var(--azul-oscuro); margin-bottom: 1.5rem; }

.sidebar nav a {
    display: block;
    padding: .6rem .5rem;
    border-radius: 8px;
    color: var(--texto);
    text-decoration: none;
    margin-bottom: .25rem;
    font-size: .9rem;
}

.sidebar nav a.active,
.sidebar nav a:hover { background: var(--gris-fondo); color: var(--azul); }

.content { flex: 1; padding: 2rem; }

.card {
    background: #fff;
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,.08);
    margin-bottom: 1.25rem;
}

table { width: 100%; border-collapse: collapse; }
th, td { text-align: left; padding: .6rem; border-bottom: 1px solid #e5e7eb; font-size: .9rem; }
th { color: #6b7280; font-weight: 600; }

.badge {
    display: inline-block;
    padding: .2rem .6rem;
    border-radius: 999px;
    font-size: .75rem;
    font-weight: 600;
}
.badge-ok { background: #dcfce7; color: var(--verde); }
.badge-pending { background: #fef9c3; color: #ca8a04; }
.badge-danger { background: #fee2e2; color: var(--rojo); }

.btn {
    display: inline-block;
    padding: .55rem 1rem;
    border-radius: 8px;
    border: none;
    background: var(--azul);
    color: #fff;
    text-decoration: none;
    font-weight: 600;
    cursor: pointer;
    font-size: .9rem;
}
.btn:hover { background: var(--azul-oscuro); }
.btn-secondary { background: #e5e7eb; color: var(--texto); }
.btn-secondary:hover { background: #d1d5db; }