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

:root {
    --fondo: #0f172a;
    --fondo-card: rgba(30, 41, 59, 0.9);
    --borde: rgba(148, 163, 184, 0.2);
    --texto: #e2e8f0;
    --texto-suave: #94a3b8;
    --acento: #38bdf8;
    --acento-hover: #0ea5e9;
    --exito: #22c55e;
    --error: #ef4444;
    --advertencia: #f59e0b;
}

body {
    font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    min-height: 100vh;
    color: var(--texto);
}

/* Login */
.pagina-login {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
}

.login-card {
    background: var(--fondo-card);
    border: 1px solid var(--borde);
    border-radius: 16px;
    padding: 2.5rem;
    width: 100%;
    max-width: 400px;
}

.login-card h1 {
    font-size: 1.75rem;
    margin-bottom: 0.25rem;
    background: linear-gradient(90deg, var(--acento), var(--acento-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.login-card .subtitulo {
    color: var(--texto-suave);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.tabs-login {
    display: flex;
    gap: 0;
    margin-bottom: 1.25rem;
    border-bottom: 1px solid var(--borde);
}

.tab-login {
    flex: 1;
    padding: 0.6rem 1rem;
    border: none;
    background: transparent;
    color: var(--texto-suave);
    font-size: 0.9rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: all 0.2s;
}

.tab-login:hover {
    color: var(--texto);
}

.tab-login.activo {
    color: var(--acento);
    border-bottom-color: var(--acento);
}

.separador-form {
    border: none;
    border-top: 1px solid var(--borde);
    margin: 1.25rem 0;
}

.form-grupo {
    margin-bottom: 1.25rem;
}

.form-grupo label {
    display: block;
    font-size: 0.875rem;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--texto-suave);
}

.form-grupo input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--borde);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.6);
    color: var(--texto);
    font-size: 1rem;
}

.form-grupo input:focus,
.form-grupo select:focus {
    outline: none;
    border-color: var(--acento);
    box-shadow: 0 0 0 2px rgba(56, 189, 248, 0.2);
}

.form-grupo select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--borde);
    border-radius: 8px;
    background: rgba(15, 23, 42, 0.6);
    color: var(--texto);
    font-size: 1rem;
}

.form-grupo input[type="checkbox"] {
    width: auto;
    margin-right: 0.5rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primario {
    background: linear-gradient(90deg, var(--acento), var(--acento-hover));
    color: white;
    width: 100%;
    margin-top: 0.5rem;
}

.btn-primario:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

.btn-primario:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.msg-error {
    background: rgba(239, 68, 68, 0.2);
    border: 1px solid var(--error);
    color: #fca5a5;
    padding: 0.75rem;
    border-radius: 8px;
    font-size: 0.875rem;
    margin-bottom: 1rem;
    display: none;
}

.msg-error.visible { display: block; }

/* Layout app */
.app-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: var(--fondo-card);
    border-right: 1px solid var(--borde);
    padding: 1.5rem 0;
}

.sidebar .logo {
    padding: 0 1.5rem 1.5rem;
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(90deg, var(--acento), var(--acento-hover));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    border-bottom: 1px solid var(--borde);
    margin-bottom: 1rem;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--texto-suave);
    text-decoration: none;
    transition: all 0.2s;
}

.nav-item:hover {
    background: rgba(56, 189, 248, 0.1);
    color: var(--acento);
}

.nav-item.activo {
    background: rgba(56, 189, 248, 0.15);
    color: var(--acento);
    border-left: 3px solid var(--acento);
}

.contenido {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
}

.header-pagina {
    margin-bottom: 1.5rem;
}

.header-pagina h1 {
    font-size: 1.5rem;
    font-weight: 600;
}

.header-pagina p {
    color: var(--texto-suave);
    font-size: 0.9rem;
    margin-top: 0.25rem;
}

/* Tarjetas y tablas */
.tarjeta {
    background: var(--fondo-card);
    border: 1px solid var(--borde);
    border-radius: 12px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.tabla-contenedor {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th, td {
    padding: 0.75rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--borde);
}

th {
    font-weight: 600;
    color: var(--texto-suave);
    font-size: 0.8rem;
    text-transform: uppercase;
}

tr:hover td {
    background: rgba(56, 189, 248, 0.05);
}

.btn-sm {
    padding: 0.4rem 0.8rem;
    font-size: 0.8rem;
}

.btn-secundario {
    background: transparent;
    border: 1px solid var(--borde);
    color: var(--texto);
}

.btn-secundario:hover {
    border-color: var(--acento);
    color: var(--acento);
}

.btn-peligro {
    background: rgba(239, 68, 68, 0.2);
    color: #fca5a5;
}

.btn-peligro:hover {
    background: rgba(239, 68, 68, 0.3);
}

/* Usuario actual */
.usuario-actual {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--borde);
    margin-top: auto;
}

.usuario-actual .nombre {
    font-weight: 500;
    font-size: 0.9rem;
}

.usuario-actual .email {
    font-size: 0.75rem;
    color: var(--texto-suave);
}

.btn-cerrar {
    margin-top: 0.5rem;
    font-size: 0.8rem;
    padding: 0.4rem 0.8rem;
    background: transparent;
    color: var(--texto-suave);
    border: 1px solid var(--borde);
}

.btn-cerrar:hover {
    color: var(--error);
    border-color: var(--error);
}

/* Modal */
.overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 2rem;
}

.modal {
    background: var(--fondo-card);
    border: 1px solid var(--borde);
    border-radius: 12px;
    padding: 1.5rem;
    width: 100%;
    max-width: 480px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal h2 {
    margin-bottom: 1rem;
    font-size: 1.25rem;
}

.oculto { display: none !important; }

.badge { display: inline-block; padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.8rem; }
.badge-success { background: rgba(34, 197, 94, 0.2); color: #22c55e; }
.badge-info { background: rgba(59, 130, 246, 0.2); color: #3b82f6; }

.modal-ancho { max-width: 920px !important; }

.form-fila { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.75rem 1rem; align-items: end; }
.form-fila .form-grupo { margin-bottom: 0; }
.form-fila-2 { grid-template-columns: repeat(2, 1fr); }
.form-fila-3 { grid-template-columns: repeat(3, 1fr); }
@media (max-width: 700px) { .form-fila, .form-fila-2, .form-fila-3 { grid-template-columns: 1fr; } }

/* Dirección: 3 columnas, orden claro de llenado */
.ubicacion-item { padding: 0.5rem; margin-bottom: 0.5rem; background: rgba(255,255,255,0.03); border-radius: 6px; }
.ubicacion-item .fila-dir { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.5rem; align-items: end; }
.ubicacion-item .fila-dir .form-grupo { margin-bottom: 0; }
.ubicacion-item .fila-dir input,
.ubicacion-item .fila-dir select { padding: 0.4rem 0.5rem; font-size: 0.9rem; }
@media (max-width: 600px) { .ubicacion-item .fila-dir { grid-template-columns: 1fr; } }

/* Dashboard */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
}

.dashboard-stat {
    background: var(--fondo-card);
    border: 1px solid var(--borde);
    border-radius: 12px;
    padding: 1.25rem;
}

.dashboard-stat .valor {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--acento);
}

.dashboard-stat .etiqueta {
    font-size: 0.85rem;
    color: var(--texto-suave);
    margin-top: 0.25rem;
}