* { box-sizing: border-box; margin: 0; padding: 0; }
body { font-family: 'Segoe UI', Arial, sans-serif; background: #f1f3f4; }

/* ── Navbar ── */
#navbar {
    height: 56px;
    background: #1a73e8;
    display: flex;
    align-items: flex-end;
    padding: 0 20px;
    gap: 3px;
    box-shadow: 0 2px 6px rgba(0,0,0,.2);
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 2000;
}

#navbar .brand {
    color: white;
    font-size: 16px;
    font-weight: 600;
    margin-right: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
    align-self: center;
}

.nav-btn {
    padding: 0 20px;
    height: 26px;
    border: none;
    border-radius: 8px 8px 0 0;
    background: #8898c0;
    color: #dde4f0;
    font-size: 13px;
    cursor: pointer;
    transition: background .15s, color .15s, height .15s;
    display: flex;
    align-items: center;
    margin: 0 -5px;
    position: relative;
    z-index: 1;
}
.nav-btn:hover  {
    background: #a0aed4;
    color: white;
    z-index: 5;
}
.nav-btn.activo {
    background: #dcdfe6;
    color: #1a56c4;
    font-weight: 600;
    height: 34px;
    padding: 0 26px;
    z-index: 10;
    box-shadow: 0 -2px 6px rgba(0,0,0,.15);
}

.nav-spacer { flex: 1; }

.nav-user {
    color: rgba(255,255,255,.85);
    font-size: 13px;
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Contenido ── */
#contenido { margin-top: 56px; height: calc(100vh - 56px); }

/* ── Placeholder páginas ── */
.pagina-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: #5f6368;
    gap: 12px;
}
.pagina-placeholder .icono { font-size: 48px; }
.pagina-placeholder h2     { font-size: 22px; color: #202124; }
.pagina-placeholder p      { font-size: 14px; }

/* ── Leaflet markers ── */
.leaflet-marker-icon img { display: block; }
.leaflet-div-icon { background: none; border: none; overflow: visible; }