:root {
    --primary: #5b6ef5;
    --primary-dark: #4f5fc7;
    --primary-light: #7c8dff;
    --secondary: #2d3142;
    --accent: #FFF;
    --accent-light: #e8ebff;
    --border: #e5e7eb;
    --border-gray: #cbd5e1;
    --text: #1e293b;
    --text-light: rgba(30,41,59,0.85);
    --text-muted: #64748b;
    --text-subtle: #94a3b8;
    --button: #5b6ef5;
    --button-gray: #64748b;
    --button-hover: #7c8dff;
    --button-text: #fff;
    --input-bg: #ffffff;
    --input-border: #cbd5e1;
    --input-text: #1e293b;
    --shadow: #000000;
    --shadow-gray: #64748b;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #5b6ef5;
    --background: #2d3142;
    --overlay: rgba(0,0,0,0.6);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--background);
    color: var(--text);
    line-height: 1.6;
}

/* Header de navegación */
.header {
    background-color: var(--secondary);
    padding: 0 20px;
    box-shadow: 0 2px 10px rgba(0,0,0,0.2);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header-logo {
    color: var(--accent);
    font-size: 20px;
    font-weight: 700;
    text-decoration: none;
}

.header-nav {
    display: flex;
    gap: 10px;
    align-items: center;
}

.header-nav a {
    color: var(--accent);
    text-decoration: none;
    padding: 10px 20px;
    border-radius: 8px;
    transition: background-color 0.3s;
    font-weight: 500;
}

.header-nav a:hover, .header-nav a.active {
    background-color: var(--primary);
}

.header-logout {
    background-color: var(--danger);
    color: var(--button-text);
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 500;
    transition: opacity 0.3s;
}

.header-logout:hover {
    opacity: 0.8;
}

/* Botón de menú móvil */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--accent);
    font-size: 24px;
    cursor: pointer;
}

/* Contenedor principal */
.main-container {
    margin-top: 60px;
    padding: 20px;
    max-width: 1200px;
    margin-left: auto;
    margin-right: auto;
}

/* Tarjetas */
.card {
    background-color: var(--accent);
    border-radius: 20px;
    padding: 24px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
    border: 1px solid var(--border-gray);
    margin-bottom: 20px;
}

.card-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
    margin-bottom: 16px;
}

/* Formularios */
.form-group {
    margin-bottom: 16px;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.form-input {
    width: 100%;
    background-color: var(--input-bg);
    border-radius: 10px;
    border: 1px solid var(--input-border);
    font-size: 15px;
    color: var(--input-text);
    padding: 12px;
    transition: border-color 0.3s;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

/* Botones */
.btn {
    padding: 12px 24px;
    border-radius: 10px;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.3s;
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--button-text);
}

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

.btn-secondary {
    background-color: var(--button-gray);
    color: var(--button-text);
}

.btn-secondary:hover {
    opacity: 0.8;
}

.btn-danger {
    background-color: var(--danger);
    color: var(--button-text);
}

.btn-danger:hover {
    opacity: 0.8;
}

.btn-success {
    background-color: var(--success);
    color: var(--button-text);
}

.btn-success:hover {
    opacity: 0.8;
}

.btn-block {
    width: 100%;
}

/* Alertas */
.alert {
    padding: 16px;
    border-radius: 10px;
    margin-bottom: 16px;
    font-weight: 500;
}

.alert-success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success);
}

.alert-danger {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--danger);
}

.alert-warning {
    background-color: #fef3c7;
    color: #92400e;
    border: 1px solid var(--warning);
}

.alert-info {
    background-color: var(--accent-light);
    color: var(--primary-dark);
    border: 1px solid var(--primary);
}

/* Loading */
.loading {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 40px;
}

.spinner {
    border: 4px solid var(--border);
    border-top: 4px solid var(--primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

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

.modal.show {
    display: flex;
}

.modal-content {
    background-color: var(--accent);
    border-radius: 20px;
    padding: 24px;
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.modal-title {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 24px;
    color: var(--text-muted);
    cursor: pointer;
}

/* Login específico */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.login-card {
    max-width: 400px;
    width: 100%;
}

.login-logo {
    text-align: center;
    margin-bottom: 32px;
}

.login-logo h1 {
    color: var(--primary);
    font-size: 32px;
    font-weight: 700;
}

/* Responsive */
@media (max-width: 768px) {
    .header-nav {
        position: fixed;
        top: 60px;
        left: 0;
        right: 0;
        background-color: var(--secondary);
        flex-direction: column;
        padding: 20px;
        display: none;
        box-shadow: 0 4px 6px rgba(0,0,0,0.2);
    }
    
    .header-nav.mobile-open {
        display: flex;
    }
    
    .header-nav a {
        width: 100%;
        text-align: center;
    }
    
    .mobile-menu-btn {
        display: block;
    }
    
    .main-container {
        padding: 10px;
    }
    
    .card {
        padding: 16px;
    }
}

/* Utilidades */
.text-center {
    text-align: center;
}

.mt-4 {
    margin-top: 16px;
}

.mb-4 {
    margin-bottom: 16px;
}

.d-none {
    display: none;
}

.d-block {
    display: block;
}