/* ============================================================
   SIGestion - Estilos principales
   Tema oscuro con acentos cyan (personalizable vía variables CSS)
   ============================================================ */

:root {
    --color-principal:   #00BCD4;
    --color-secundario:  #0097A7;
    --color-fondo:       #1A1A1A;
    --color-fondo2:      #2A2A2A;
    --color-fondo3:      #333333;
    --color-texto:       #FFFFFF;
    --color-texto2:      #B0B0B0;
    --color-exito:       #4CAF50;
    --color-alerta:      #FF9800;
    --color-error:       #F44336;
    --color-borde:       #3A3A3A;
    --radio-borde:       8px;
    --sombra:            0 2px 8px rgba(0,0,0,0.4);
    --fuente:            'Segoe UI', Arial, sans-serif;
    --sidebar-ancho:     240px;
    --header-alto:       60px;
}

/* === RESET Y BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 15px; scroll-behavior: smooth; }
body {
    font-family: var(--fuente);
    background-color: var(--color-fondo);
    color: var(--color-texto);
    min-height: 100vh;
    line-height: 1.5;
}
a { color: var(--color-principal); text-decoration: none; }
a:hover { color: var(--color-secundario); text-decoration: underline; }
img { max-width: 100%; }

/* === LAYOUT PRINCIPAL === */
.layout {
    display: flex;
    min-height: 100vh;
}
.sidebar {
    width: var(--sidebar-ancho);
    background: var(--color-fondo2);
    border-right: 1px solid var(--color-borde);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    overflow-y: auto;
    z-index: 100;
    transition: transform 0.3s;
}
.main-content {
    margin-left: var(--sidebar-ancho);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}
.topbar {
    height: var(--header-alto);
    background: var(--color-fondo2);
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 90;
}
.page-content {
    padding: 28px 28px 40px;
    flex: 1;
}

/* === SIDEBAR === */
.sidebar-logo {
    padding: 20px 20px 16px;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    gap: 12px;
}
.sidebar-logo img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    border-radius: 6px;
}
.sidebar-logo-texto {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-principal);
    letter-spacing: 0.5px;
}
.sidebar-logo-sub {
    font-size: 0.72rem;
    color: var(--color-texto2);
}
.sidebar-nav {
    padding: 12px 0;
    flex: 1;
}
.nav-seccion {
    padding: 12px 16px 4px;
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-texto2);
}
.nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 20px;
    color: var(--color-texto2);
    font-size: 0.9rem;
    transition: background 0.15s, color 0.15s;
    border-left: 3px solid transparent;
    cursor: pointer;
    text-decoration: none;
}
.nav-item:hover {
    background: var(--color-fondo3);
    color: var(--color-texto);
    text-decoration: none;
}
.nav-item.activo {
    border-left-color: var(--color-principal);
    background: rgba(0,188,212,0.1);
    color: var(--color-principal);
}
.nav-item .icono {
    width: 18px;
    text-align: center;
    flex-shrink: 0;
}
.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid var(--color-borde);
    font-size: 0.8rem;
    color: var(--color-texto2);
}

/* === TOPBAR === */
.topbar-titulo {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-texto);
}
.topbar-acciones {
    display: flex;
    align-items: center;
    gap: 16px;
}
.topbar-usuario {
    font-size: 0.85rem;
    color: var(--color-texto2);
}
.topbar-usuario strong {
    color: var(--color-texto);
}
.btn-menu-mobile {
    display: none;
    background: none;
    border: none;
    color: var(--color-texto);
    font-size: 1.4rem;
    cursor: pointer;
    padding: 4px 8px;
}

/* === BOTONES === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 18px;
    border-radius: var(--radio-borde);
    border: none;
    cursor: pointer;
    font-size: 0.88rem;
    font-weight: 600;
    font-family: var(--fuente);
    transition: background 0.15s, transform 0.1s;
    text-decoration: none;
}
.btn:hover { text-decoration: none; transform: translateY(-1px); }
.btn:active { transform: translateY(0); }
.btn-primary   { background: var(--color-principal); color: #000; }
.btn-primary:hover { background: var(--color-secundario); color: #000; }
.btn-secondary { background: var(--color-fondo3); color: var(--color-texto); }
.btn-secondary:hover { background: #444; color: var(--color-texto); }
.btn-exito     { background: var(--color-exito); color: #fff; }
.btn-peligro   { background: var(--color-error); color: #fff; }
.btn-alerta    { background: var(--color-alerta); color: #000; }
.btn-sm { padding: 5px 12px; font-size: 0.8rem; }
.btn-lg { padding: 12px 28px; font-size: 1rem; }
.btn-block { width: 100%; justify-content: center; }

/* === TARJETAS === */
.card {
    background: var(--color-fondo2);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio-borde);
    box-shadow: var(--sombra);
}
.card-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
}
.card-header h2, .card-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-texto);
    margin: 0;
}
.card-body { padding: 20px; }
.card-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--color-borde);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* === FORMULARIOS === */
.form-group { margin-bottom: 18px; }
.form-label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-texto2);
}
.form-control {
    width: 100%;
    background: var(--color-fondo3);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio-borde);
    color: var(--color-texto);
    padding: 9px 13px;
    font-size: 0.9rem;
    font-family: var(--fuente);
    transition: border-color 0.15s;
    outline: none;
}
.form-control:focus {
    border-color: var(--color-principal);
    box-shadow: 0 0 0 3px rgba(0,188,212,0.15);
}
.form-control::placeholder { color: #666; }
select.form-control { cursor: pointer; }
textarea.form-control { resize: vertical; min-height: 90px; }
.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
}
.form-text {
    font-size: 0.78rem;
    color: var(--color-texto2);
    margin-top: 4px;
}

/* === TABLAS === */
.tabla-container { overflow-x: auto; }
.tabla {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}
.tabla thead th {
    background: var(--color-fondo3);
    color: var(--color-texto2);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 10px 14px;
    text-align: left;
    border-bottom: 1px solid var(--color-borde);
    white-space: nowrap;
}
.tabla tbody td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--color-borde);
    vertical-align: middle;
}
.tabla tbody tr:hover { background: rgba(255,255,255,0.03); }
.tabla tbody tr:last-child td { border-bottom: none; }
.tabla-acciones { display: flex; gap: 6px; align-items: center; }

/* === ALERTAS FLASH === */
.alerta {
    padding: 12px 18px;
    border-radius: var(--radio-borde);
    margin-bottom: 20px;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 10px;
}
.alerta-exito  { background: rgba(76,175,80,0.15); border: 1px solid var(--color-exito); color: var(--color-exito); }
.alerta-error  { background: rgba(244,67,54,0.15); border: 1px solid var(--color-error);  color: var(--color-error); }
.alerta-alerta { background: rgba(255,152,0,0.15); border: 1px solid var(--color-alerta); color: var(--color-alerta); }
.alerta-info   { background: rgba(0,188,212,0.15); border: 1px solid var(--color-principal); color: var(--color-principal); }

/* === BADGES / CHIPS === */
.badge {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}
.badge-activo     { background: rgba(76,175,80,0.2); color: var(--color-exito); }
.badge-inactivo   { background: rgba(244,67,54,0.2); color: var(--color-error); }
.badge-pendiente  { background: rgba(255,152,0,0.2); color: var(--color-alerta); }
.badge-cobrado    { background: rgba(76,175,80,0.2); color: var(--color-exito); }
.badge-anulado    { background: rgba(244,67,54,0.2); color: var(--color-error); }
.badge-convertido { background: rgba(0,188,212,0.2); color: var(--color-principal); }

/* === ESTADÍSTICAS (dashboard) === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}
.stat-card {
    background: var(--color-fondo2);
    border: 1px solid var(--color-borde);
    border-radius: var(--radio-borde);
    padding: 20px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.stat-titulo {
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--color-texto2);
}
.stat-valor {
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--color-principal);
}
.stat-sub {
    font-size: 0.78rem;
    color: var(--color-texto2);
}

/* === PAGINACIÓN === */
.paginacion {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 8px;
    padding: 16px 0 0;
    font-size: 0.85rem;
}
.paginacion a, .paginacion span {
    padding: 6px 12px;
    border-radius: var(--radio-borde);
    border: 1px solid var(--color-borde);
    color: var(--color-texto2);
    background: var(--color-fondo2);
    transition: all 0.15s;
}
.paginacion a:hover { border-color: var(--color-principal); color: var(--color-principal); text-decoration: none; }
.paginacion .activo { background: var(--color-principal); color: #000; border-color: var(--color-principal); }

/* === PAGE HEADER === */
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
    gap: 16px;
    flex-wrap: wrap;
}
.page-header h1 {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--color-texto);
}
.page-header p {
    font-size: 0.85rem;
    color: var(--color-texto2);
    margin-top: 4px;
}

/* === BÚSQUEDA === */
.busqueda-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 16px;
    flex-wrap: wrap;
}
.busqueda-bar .form-control { max-width: 340px; }

/* === LOGIN === */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-fondo);
    padding: 20px;
}
.login-box {
    width: 100%;
    max-width: 400px;
    background: var(--color-fondo2);
    border: 1px solid var(--color-borde);
    border-radius: 12px;
    padding: 40px 36px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.login-logo {
    text-align: center;
    margin-bottom: 32px;
}
.login-logo img { height: 60px; }
.login-logo .titulo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-principal);
    margin-top: 12px;
}
.login-logo .subtitulo {
    font-size: 0.85rem;
    color: var(--color-texto2);
}

/* === MODAL === */
.modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.65);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 500;
    padding: 20px;
}
.modal-overlay.abierto { display: flex; }
.modal {
    background: var(--color-fondo2);
    border: 1px solid var(--color-borde);
    border-radius: 12px;
    width: 100%;
    max-width: 560px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 16px 48px rgba(0,0,0,0.6);
    animation: modal-in 0.2s ease;
}
@keyframes modal-in {
    from { opacity: 0; transform: scale(0.95); }
    to   { opacity: 1; transform: scale(1); }
}
.modal-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.modal-header h3 { font-size: 1rem; font-weight: 600; }
.modal-cerrar {
    background: none;
    border: none;
    color: var(--color-texto2);
    font-size: 1.3rem;
    cursor: pointer;
    padding: 2px 6px;
    border-radius: 4px;
}
.modal-cerrar:hover { background: var(--color-fondo3); color: var(--color-texto); }
.modal-body { padding: 20px; }
.modal-footer {
    padding: 14px 20px;
    border-top: 1px solid var(--color-borde);
    display: flex;
    justify-content: flex-end;
    gap: 10px;
}

/* === UTILIDADES === */
.texto-centro  { text-align: center; }
.texto-derecha { text-align: right; }
.texto-muted   { color: var(--color-texto2); }
.texto-exito   { color: var(--color-exito); }
.texto-error   { color: var(--color-error); }
.texto-alerta  { color: var(--color-alerta); }
.texto-primary { color: var(--color-principal); }
.mb-0 { margin-bottom: 0 !important; }
.mb-1 { margin-bottom: 8px !important; }
.mb-2 { margin-bottom: 16px !important; }
.mb-3 { margin-bottom: 24px !important; }
.mt-1 { margin-top: 8px !important; }
.mt-2 { margin-top: 16px !important; }
.mt-3 { margin-top: 24px !important; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.gap-1 { gap: 8px; }
.gap-2 { gap: 16px; }
.w-100 { width: 100%; }
.separador { border: none; border-top: 1px solid var(--color-borde); margin: 20px 0; }

/* === RESPONSIVE === */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.abierto {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0;
    }
    .btn-menu-mobile {
        display: block;
    }
    .page-content {
        padding: 16px;
    }
    .form-row {
        grid-template-columns: 1fr;
    }
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .tabla thead { display: none; }
    .tabla tbody td {
        display: block;
        padding: 6px 14px;
    }
    .tabla tbody td::before {
        content: attr(data-label) ': ';
        font-weight: 600;
        color: var(--color-texto2);
    }
    .tabla tbody tr {
        display: block;
        border-bottom: 2px solid var(--color-borde);
        padding: 8px 0;
    }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: 1fr; }
    .login-box { padding: 28px 20px; }
    .page-header { flex-direction: column; align-items: flex-start; }
}