/* ===================================
   PALETA DE COLORES (Basada en Logo)
   ==================================== */
:root {
    --color-blanco: #FFFFFF;
    --color-negro: #000000;
    --color-azul-principal: #0056B3;
    --color-azul-claro: #2196F3;
    --color-azul-oscuro: #003D7A;
    --color-verde: #4CAF50;
    --color-amarillo: #FFC107;
    --color-dorado: #FFB700;
    --color-gris-claro: #F5F5F5;
    --color-gris-medio: #999999;
    --color-gris-oscuro: #333333;
    --color-borde: #DDDDDD;
}

/* ===================================
   RESET Y ESTILOS GLOBALES
   ==================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    height: 100%;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--color-blanco);
    color: var(--color-gris-oscuro);
    line-height: 1.6;
    display: flex;
    flex-direction: column;
}

/* ===================================
   TIPOGRAFÍA
   ==================================== */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-negro);
    font-weight: bold;
    margin-bottom: 1rem;
}

h1 {
    font-size: 32px;
}

h2 {
    font-size: 24px;
}

h3 {
    font-size: 20px;
}

p {
    color: var(--color-gris-oscuro);
    line-height: 1.6;
}

a {
    color: var(--color-azul-claro);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

/* ===================================
   HEADER
   ==================================== */
.header-top {
    background: var(--color-azul-principal);
    padding: 1.5rem;
    text-align: center;
    box-shadow: 0 2px 8px rgba(0, 86, 179, 0.2);
    border-bottom: 3px solid var(--color-dorado);
}

.header-logo {
    width: 300px;
    height: auto;
    padding: 0;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.header-logo img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* ===================================
   MAIN LAYOUT
   ==================================== */
.main-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px 20px;
}

.container {
    width: 100%;
    max-width: 1000px;
}

/* ===================================
   SECCIONES
   ==================================== */
.welcome-section {
    text-align: center;
    margin-bottom: 3rem;
}

.welcome-section h2 {
    color: var(--color-azul-principal);
    font-size: 28px;
    margin-bottom: 1rem;
}

.welcome-section p {
    font-size: 16px;
    color: var(--color-gris-oscuro);
}

/* ===================================
   TARJETAS (CARDS)
   ==================================== */
.cards-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    margin-bottom: 3rem;
}

.card {
    background: var(--color-blanco);
    border: 2px solid var(--color-borde);
    border-radius: 8px;
    padding: 2.5rem;
    transition: all 0.3s ease;
    text-decoration: none;
    color: inherit;
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: block;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 86, 179, 0.2);
    border-color: var(--color-azul-claro);
}

.card-icon {
    font-size: 48px;
    margin-bottom: 1.5rem;
}

.card h3 {
    color: var(--color-negro);
    margin-bottom: 1rem;
}

.card p {
    margin-bottom: 2rem;
    font-size: 14px;
}

/* Variantes de tarjeta */
.card.card-verde {
    border-color: var(--color-verde);
}

.card.card-verde::before {
    background: var(--color-verde);
}

.card.card-azul {
    border-color: var(--color-azul-claro);
}

.card.card-azul::before {
    background: var(--color-azul-claro);
}

/* ===================================
   BOTONES
   ==================================== */
.card-button, .btn {
    display: inline-block;
    width: 100%;
    padding: 12px 30px;
    border-radius: 6px;
    font-weight: bold;
    text-decoration: none;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
    text-align: center;
    font-size: 14px;
    color: var(--color-blanco);
}

/* Botón Verde */
.card.card-verde .card-button,
.btn-verde {
    background: var(--color-verde);
}

.card.card-verde .card-button:hover,
.btn-verde:hover {
    background: #3d8b40;
}

/* Botón Azul */
.card.card-azul .card-button,
.btn-azul {
    background: var(--color-azul-claro);
}

.card.card-azul .card-button:hover,
.btn-azul:hover {
    background: var(--color-azul-principal);
}

/* Botón Secundario */
.btn-secundario {
    background: var(--color-gris-claro);
    color: var(--color-negro);
    border: 1px solid var(--color-borde);
}

.btn-secundario:hover {
    background: var(--color-borde);
}

/* Botón Peligro */
.btn-peligro {
    background: #D32F2F;
}

.btn-peligro:hover {
    background: #B71C1C;
}

/* ===================================
   FORMULARIOS
   ==================================== */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
    color: var(--color-negro);
    font-size: 14px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-borde);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    background: var(--color-blanco);
    color: var(--color-negro);
    transition: border-color 0.3s;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--color-azul-claro);
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.1);
}

/* ===================================
   CAJAS DE CARACTERÍSTICAS
   ==================================== */
.features {
    background: var(--color-gris-claro);
    border-left: 4px solid var(--color-verde);
    border-right: 4px solid var(--color-azul-claro);
    border-radius: 8px;
    padding: 2rem;
    margin-bottom: 2rem;
}

.features h3 {
    color: var(--color-azul-principal);
    margin-bottom: 1.5rem;
    font-size: 18px;
}

.features ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    font-size: 13px;
    color: var(--color-gris-oscuro);
}

.features li {
    padding: 8px 0;
}

.features li:before {
    content: "✓ ";
    font-weight: bold;
    color: var(--color-verde);
    margin-right: 8px;
}

/* ===================================
   TABLAS
   ==================================== */
table {
    width: 100%;
    border-collapse: collapse;
    background: var(--color-blanco);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
}

table tr {
    border-bottom: 1px solid var(--color-borde);
}

table th {
    background: var(--color-gris-claro);
    padding: 12px;
    text-align: left;
    font-weight: bold;
    border-bottom: 2px solid var(--color-borde);
    color: var(--color-negro);
}

table td {
    padding: 12px;
}

table tr:hover {
    background: #FAFAFA;
}

/* ===================================
   ALERTAS Y MENSAJES
   ==================================== */
.alert {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
}

.alert-success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid #4CAF50;
}

.alert-error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 4px solid #D32F2F;
}

.alert-warning {
    background: #FFF3CD;
    color: #856404;
    border-left: 4px solid #FF9800;
}

.alert-info {
    background: #E3F2FD;
    color: #1565C0;
    border-left: 4px solid #2196F3;
}

/* ===================================
   BADGES Y ETIQUETAS
   ==================================== */
.badge {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: bold;
}

.badge-verde {
    background: #E8F5E9;
    color: #2E7D32;
}

.badge-azul {
    background: #E3F2FD;
    color: #1565C0;
}

.badge-rojo {
    background: #FFEBEE;
    color: #C62828;
}

.badge-gris {
    background: #F5F5F5;
    color: #999999;
}

/* ===================================
   MODALES
   ==================================== */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.3s ease;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: var(--color-blanco);
    padding: 2rem;
    border-radius: 8px;
    width: 90%;
    max-width: 500px;
    position: relative;
    animation: slideIn 0.3s ease;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

.modal-close {
    position: absolute;
    right: 1rem;
    top: 1rem;
    font-size: 28px;
    font-weight: bold;
    color: var(--color-gris-medio);
    cursor: pointer;
    background: none;
    border: none;
    transition: color 0.3s;
}

.modal-close:hover {
    color: var(--color-negro);
}

.modal h2 {
    color: var(--color-azul-principal);
    margin-bottom: 1.5rem;
    text-align: center;
}

.modal .form-group {
    margin-bottom: 1.5rem;
}

.modal .form-group label {
    display: block;
    margin-bottom: 6px;
    font-weight: bold;
    color: var(--color-negro);
    font-size: 14px;
}

.modal .form-group input {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--color-borde);
    border-radius: 4px;
    font-size: 14px;
    font-family: inherit;
    background: var(--color-blanco);
    color: var(--color-negro);
    transition: border-color 0.3s;
}

.modal .form-group input:focus {
    outline: none;
    border-color: var(--color-azul-claro);
    box-shadow: 0 0 0 2px rgba(33, 150, 243, 0.1);
}

.modal-footer {
    display: flex;
    gap: 1rem;
    margin-top: 2rem;
}

.modal-footer button {
    flex: 1;
    padding: 10px;
    border-radius: 4px;
    font-weight: bold;
    cursor: pointer;
    border: none;
    font-size: 14px;
    transition: all 0.3s;
}

.modal-footer .btn-submit {
    background: var(--color-azul-claro);
    color: var(--color-blanco);
}

.modal-footer .btn-submit:hover {
    background: var(--color-azul-principal);
}

.modal-footer .btn-cancel {
    background: var(--color-gris-claro);
    color: var(--color-negro);
    border: 1px solid var(--color-borde);
}

.modal-footer .btn-cancel:hover {
    background: var(--color-borde);
}

.modal-footer .btn-submit.verde {
    background: var(--color-verde);
}

.modal-footer .btn-submit.verde:hover {
    background: #3d8b40;
}

.modal-message {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 4px;
    display: none;
}

.modal-message.success {
    background: #E8F5E9;
    color: #2E7D32;
    border-left: 4px solid #4CAF50;
    display: block;
}

.modal-message.error {
    background: #FFEBEE;
    color: #C62828;
    border-left: 4px solid #D32F2F;
    display: block;
}

.modal-divider {
    text-align: center;
    margin: 1.5rem 0;
    color: var(--color-gris-medio);
    font-size: 12px;
}

.modal-link {
    text-align: center;
    margin-top: 1rem;
    font-size: 14px;
    color: var(--color-gris-oscuro);
}

.modal-link a {
    color: var(--color-azul-claro);
    font-weight: bold;
    cursor: pointer;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* ===================================
   FOOTER
   ==================================== */
.footer {
    background: var(--color-azul-principal);
    color: var(--color-blanco);
    text-align: center;
    padding: 1.5rem;
    font-size: 12px;
    opacity: 0.9;
    margin-top: auto;
    border-top: 3px solid var(--color-dorado);
}

/* ===================================
   UTILITARIOS
   ==================================== */
.text-center {
    text-align: center;
}

.text-left {
    text-align: left;
}

.text-right {
    text-align: right;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.mb-4 { margin-bottom: 2rem; }

.p-1 { padding: 0.5rem; }
.p-2 { padding: 1rem; }
.p-3 { padding: 1.5rem; }
.p-4 { padding: 2rem; }

.text-muted {
    color: var(--color-gris-medio);
}

.text-danger {
    color: #D32F2F;
}

.text-success {
    color: #4CAF50;
}

.text-info {
    color: #2196F3;
}

/* ===================================
   RESPONSIVE
   ==================================== */
@media (max-width: 768px) {
    .cards-container {
        grid-template-columns: 1fr;
    }
    
    h1 {
        font-size: 24px;
    }
    
    h2 {
        font-size: 20px;
    }
    
    .header-top {
        padding: 1rem;
    }
    
    .header-logo {
        width: 200px;
        height: auto;
    }
    
    .features ul {
        grid-template-columns: 1fr;
    }
    
    .main-content {
        padding: 20px;
    }
    
    .card {
        padding: 1.5rem;
    }
    
    .modal-content {
        width: 95%;
    }
}

@media (max-width: 480px) {
    body {
        font-size: 14px;
    }
    
    h1 {
        font-size: 20px;
    }
    
    .card {
        padding: 1rem;
    }
    
    .features {
        padding: 1rem;
    }
    
    .header-top {
        padding: 0.8rem;
    }
    
    .header-logo {
        width: 150px;
        height: auto;
    }
    
    .modal-content {
        width: 100%;
        margin: 10px;
        border-radius: 8px;
    }
}