/* Variables CSS para temas */
:root {
    /* Tema claro (por defecto) */
    --color-fondo: #f8f9fa;
    --color-fondo-card: #ffffff;
    --color-texto: #212529;
    --color-texto-secundario: #6c757d;
    --color-borde: #dee2e6;
    --color-primario: #4361ee;
    --color-secundario: #3a0ca3;
    --color-exito: #2ecc71;
    --color-peligro: #e74c3c;
    --color-advertencia: #f39c12;
    --sombra-card: 0 4px 6px rgba(0, 0, 0, 0.1);
    --sombra-nav: 0 2px 4px rgba(0, 0, 0, 0.1);
}

/* Tema oscuro */
[data-tema="oscuro"] {
    --color-fondo: #121212;
    --color-fondo-card: #1e1e1e;
    --color-texto: #e0e0e0;
    --color-texto-secundario: #b0b0b0;
    --color-borde: #333333;
    --color-primario: #5a6fd8;
    --color-secundario: #7b2cbf;
    --color-exito: #27ae60;
    --color-peligro: #c0392b;
    --color-advertencia: #d35400;
    --sombra-card: 0 4px 6px rgba(0, 0, 0, 0.3);
    --sombra-nav: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Estilos generales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--color-fondo);
    color: var(--color-texto);
    line-height: 1.6;
    min-height: 100vh;
}

/* Login responsive */
.login-body {
    background: linear-gradient(135deg, var(--color-primario) 0%, var(--color-secundario) 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-container {
    width: 100%;
    max-width: 420px;
}

.login-box {
    background: var(--color-fondo-card);
    border-radius: 16px;
    box-shadow: var(--sombra-card);
    padding: 40px;
    border: 1px solid var(--color-borde);
}

/* Navbar responsiva */
.navbar {
    background: var(--color-fondo-card);
    box-shadow: var(--sombra-nav);
    padding: 1rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--color-borde);
}

.nav-brand {
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--color-primario);
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-user {
    display: flex;
    align-items: center;
    gap: 15px;
}

/* Hamburguer menu */
.hamburger-menu {
    display: none;
    flex-direction: column;
    cursor: pointer;
    gap: 4px;
    padding: 8px;
}

.hamburger-menu span {
    width: 25px;
    height: 3px;
    background-color: var(--color-texto);
    border-radius: 2px;
    transition: 0.3s;
}

.hamburger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(6px, 6px);
}

.hamburger-menu.active span:nth-child(2) {
    opacity: 0;
}

.hamburger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(6px, -6px);
}

/* Tema switch */
.tema-switch {
    position: relative;
    display: inline-block;
    width: 60px;
    height: 30px;
}

.tema-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.tema-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--color-borde);
    border-radius: 34px;
    transition: .4s;
}

.tema-slider:before {
    position: absolute;
    content: "🌙";
    height: 22px;
    width: 22px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    border-radius: 50%;
    transition: .4s;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

input:checked + .tema-slider {
    background-color: var(--color-primario);
}

input:checked + .tema-slider:before {
    content: "☀️";
    transform: translateX(30px);
}

/* Container y sidebar */
.container {
    display: flex;
    min-height: calc(100vh - 70px);
}

.sidebar {
    width: 280px;
    background: var(--color-fondo-card);
    border-right: 1px solid var(--color-borde);
    padding: 20px 0;
    transition: transform 0.3s ease;
    position: relative;
    z-index: 900;
}

/* Menú responsivo */
.menu {
    list-style: none;
}

.menu li {
    border-bottom: 1px solid var(--color-borde);
}

.menu a {
    display: flex;
    align-items: center;
    padding: 1rem 1.5rem;
    color: var(--color-texto-secundario);
    text-decoration: none;
    transition: all 0.3s;
    font-weight: 500;
}

.menu a:hover {
    background-color: var(--color-primario);
    color: white;
    padding-left: 2rem;
}

.menu a i {
    margin-right: 12px;
    width: 20px;
    text-align: center;
}

.menu .active a {
    background-color: var(--color-primario);
    color: white;
    border-right: 4px solid var(--color-secundario);
}

/* Contenido principal */
.main-content {
    flex: 1;
    padding: 2rem;
    transition: margin-left 0.3s;
}

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    color: var(--color-texto);
    font-size: 1.8rem;
    font-weight: 700;
}

/* Cards y tarjetas */
.card {
    background: var(--color-fondo-card);
    border-radius: 12px;
    box-shadow: var(--sombra-card);
    border: 1px solid var(--color-borde);
    margin-bottom: 1.5rem;
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.card-header h3 {
    color: var(--color-texto);
    font-size: 1.2rem;
    font-weight: 600;
}

.card-body {
    padding: 1.5rem;
}

/* Formularios mejorados */
.form-card {
    background: var(--color-fondo-card);
    border-radius: 12px;
    padding: 2rem;
    border: 1px solid var(--color-borde);
    box-shadow: var(--sombra-card);
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin: 0 -0.75rem;
}

.form-group {
    margin-bottom: 1.5rem;
    padding: 0 0.75rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--color-texto);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--color-borde);
    border-radius: 8px;
    font-size: 0.95rem;
    background: var(--color-fondo);
    color: var(--color-texto);
    transition: all 0.3s;
}

.form-control:focus {
    outline: none;
    border-color: var(--color-primario);
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

/* Tablas responsivas */
.table-container {
    overflow-x: auto;
    border-radius: 8px;
    border: 1px solid var(--color-borde);
}

.table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

.table th {
    background: var(--color-primario);
    color: white;
    font-weight: 600;
    padding: 1rem;
    text-align: left;
    font-size: 0.9rem;
}

.table td {
    padding: 1rem;
    border-bottom: 1px solid var(--color-borde);
    color: var(--color-texto);
}

.table tr:hover {
    background: rgba(67, 97, 238, 0.05);
}

/* Botones de acción */
.actions {
    display: flex;
    gap: 0.5rem;
}

.btn-action {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: all 0.3s;
    border: none;
    cursor: pointer;
}

.btn-edit {
    background: var(--color-exito);
    color: white;
}

.btn-view {
    background: var(--color-primario);
    color: white;
}

.btn-delete {
    background: var(--color-peligro);
    color: white;
}

.btn-action:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

/* Grid de estadísticas */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--color-fondo-card);
    border-radius: 12px;
    padding: 1.5rem;
    border: 1px solid var(--color-borde);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--color-primario);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.5rem;
}

.stat-info h3 {
    font-size: 2rem;
    color: var(--color-texto);
    margin-bottom: 0.25rem;
}

.stat-info p {
    color: var(--color-texto-secundario);
    font-size: 0.9rem;
}

/* Modal para claves */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--color-fondo-card);
    border-radius: 12px;
    width: 90%;
    max-width: 500px;
    border: 1px solid var(--color-borde);
    animation: modalSlide 0.3s ease;
}

@keyframes modalSlide {
    from {
        opacity: 0;
        transform: translateY(-50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.modal-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-borde);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.close-modal {
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-texto-secundario);
}

.modal-body {
    padding: 1.5rem;
}

.modal-footer {
    padding: 1.5rem;
    border-top: 1px solid var(--color-borde);
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    display: inline-block;
}

.badge-info {
    background: rgba(67, 97, 238, 0.1);
    color: var(--color-primario);
}

.badge-success {
    background: rgba(46, 204, 113, 0.1);
    color: var(--color-exito);
}

.badge-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--color-advertencia);
}

/* Claves ocultas */
.clave-oculta {
    font-family: monospace;
    letter-spacing: 2px;
    color: var(--color-texto-secundario);
}

.btn-revelar {
    background: none;
    border: 1px solid var(--color-borde);
    border-radius: 4px;
    padding: 0.25rem 0.5rem;
    cursor: pointer;
    color: var(--color-texto-secundario);
    margin-left: 0.5rem;
    transition: all 0.3s;
}

.btn-revelar:hover {
    background: var(--color-primario);
    color: white;
    border-color: var(--color-primario);
}

/* Search box */
.search-box {
    position: relative;
    width: 300px;
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 2.5rem;
    border: 2px solid var(--color-borde);
    border-radius: 8px;
    background: var(--color-fondo);
    color: var(--color-texto);
}

.search-box i {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-texto-secundario);
}

/* Validación de RUC */
.ruc-valido {
    color: var(--color-exito);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

.ruc-invalido {
    color: var(--color-peligro);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}