:root {
    --sidebar-width: 200px;
    --header-height: 64px;
    --color-bg: #f4f6f9;
    --color-sidebar: #1e2a36;
    --color-sidebar-hover: #2c3e50;
    --color-header: #ffffff;
    --color-primary: #2c9c8e;
    --color-primary-dark: #1f7a6b;
    --color-text: #333333;
    --color-muted: #6c757d;
    --color-border: #e0e4e8;
    --color-card: #ffffff;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
    --radius: 10px;
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    background-color: var(--color-bg);
    color: var(--color-text);
    display: flex;
    min-height: 100vh;
}

/* ========== SIDEBAR ========== */
.sidebar {
    width: var(--sidebar-width);
    background: var(--color-sidebar);
    color: #c8d6e5;
    position: fixed;
    top: 0;
    left: 0;
    bottom: 0;
    overflow-y: auto;
    padding: 20px 0;
    box-shadow: var(--shadow-md);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.sidebar .logo {
    padding: 0 20px 25px;
    font-size: 1.3rem;
    font-weight: 600;
    color: #ffffff;
    letter-spacing: -0.5px;
    text-align: center;
}

.sidebar .logo i { color: var(--color-primary); }

.sidebar .section-title {
    padding: 15px 20px 5px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #8a9bae;
}

.sidebar .list-group {
    margin: 0 12px;
    flex-grow: 1;
}

.sidebar .list-group-item {
    background: transparent;
    border: none;
    color: #c8d6e5;
    padding: 10px 15px;
    border-radius: 6px;
    margin-bottom: 2px;
    font-size: 0.9rem;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar .list-group-item i {
    width: 20px;
    color: #7f8fa4;
    text-align: center;
}

.sidebar .list-group-item:hover,
.sidebar .list-group-item.active {
    background: var(--color-sidebar-hover);
    color: #ffffff;
}

.sidebar .list-group-item.active i { color: var(--color-primary); }

.sidebar hr {
    border: none;
    border-top: 1px solid #5a6b7a; /* gris más claro, sin transparencia */
    margin: 10px 0;
    opacity: 1;
}

.sidebar .logout-item .list-group-item {
    color: #e74c3c;
}

.sidebar .logout-item .list-group-item i { color: #e74c3c; }

/* ========== HEADER ========== */
.header {
    position: fixed;
    top: 0;
    left: var(--sidebar-width);
    right: 0;
    min-height: var(--header-height);   /* usa min-height en lugar de height */
    background: var(--color-header);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    padding: 12px 25px;                /* espacio interior claro */
    z-index: 999;
    box-shadow: var(--shadow-sm);
}

.header .kpi-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.header .kpi-item {
    background: var(--color-bg);
    padding: 8px 16px;
    border-radius: 8px;
    border: 1px solid var(--color-border);
    font-size: 0.75rem;
    color: var(--color-muted);
    text-align: center;
    white-space: nowrap;
    line-height: 1.4;
}

.header .kpi-item .value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text);
    display: block;
    margin-top: 2px;
}

.header .kpi-item.warning .value {
    color: #e67e22;
}

/* ========== CONTENIDO PRINCIPAL ========== */
.main-content {
    margin-left: var(--sidebar-width);
    margin-top: var(--header-height);
    padding: 25px;
    width: 100%;
    background: var(--color-bg);
    min-height: calc(100vh - var(--header-height));
}

/* ========== TARJETAS GENÉRICAS ========== */
.card {
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-sm);
    background: var(--color-card);
}

/* ========== BOTONES ========== */
.btn-primary-soft {
    background: var(--color-primary);
    border: none;
    color: #fff;
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8rem;
    font-weight: 500;
    cursor: pointer;
    transition: background 0.2s;
}

.btn-primary-soft:hover { background: var(--color-primary-dark); }

/* ========== LAYOUT INTERNO DEL MAIN ========== */
.main-content {
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    flex: 1;
}

/* ========== FOOTER ========== */
footer {
    text-align: center;
    color: #6c757d;
    font-size: 0.8rem;
    padding: 10px 0 5px;
    margin-top: auto;
    border-top: 1px solid var(--color-border);
    white-space: nowrap;
}

footer a {
    color: #6c757d;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
    color: var(--color-primary);
}

/* Botón hamburguesa (oculto en escritorio) */
.sidebar-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0 10px;
}

/* Mostrar botón en móviles */
@media (max-width: 768px) {
    .sidebar-toggle {
        display: block;
    }

    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .sidebar.open {
        transform: translateX(0);
    }

    .header, .main-content {
        margin-left: 0;
    }

    .header {
        justify-content: flex-start;
    }
}



/* ========== RESPONSIVE ========== */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: 0.3s;
    }
    .sidebar.open { transform: translateX(0); }
    .header, .main-content { margin-left: 0; }
    .header { justify-content: center; }
    .header .kpi-group { flex-wrap: wrap; justify-content: center; }
}