/* Variables de color */
:root {
    --primary-color: #1e88e5;
    --secondary-color: #26a69a;
    --danger-color: #ef5350;
    --warning-color: #fb8c00;
    --success-color: #43a047;
    --dark-bg: #0d1117;
    --light-bg: #f6f8fa;
    --border-color: #e1e4e8;
    --text-primary: #24292e;
    --text-secondary: #586069;
}

/* Reset y estilos generales */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

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

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

a:hover {
    text-decoration: underline;
}

/* Navbar */
.navbar {
    background-color: #fff;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    padding: 1rem 0;
    margin-bottom: 2rem;
}

.navbar-container {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 1rem;
}

.navbar-brand {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary-color);
}

.navbar-menu {
    display: flex;
    gap: 2rem;
    align-items: center;
}

.navbar-menu a {
    color: var(--text-primary);
    font-weight: 500;
}

.navbar-menu a:hover {
    color: var(--primary-color);
}

.logout-btn {
    background-color: var(--danger-color);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    border: none;
    cursor: pointer;
    font-size: 0.9rem;
}

.logout-btn:hover {
    background-color: #d32f2f;
}

/* Container */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Cards */
.card {
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
}

.card-header {
    font-size: 1.3rem;
    font-weight: bold;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.5rem;
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
textarea,
select {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 1rem;
    font-family: inherit;
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(30, 136, 229, 0.1);
}

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

/* Botones */
.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: 4px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-block;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: #1565c0;
    text-decoration: none;
}

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

.btn-secondary:hover {
    background-color: #1b8577;
}

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

.btn-danger:hover {
    background-color: #d32f2f;
}

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

.btn-success:hover {
    background-color: #2e7d32;
}

.btn-block {
    width: 100%;
}

/* Alertas */
.alert {
    padding: 1rem;
    margin-bottom: 1.5rem;
    border-radius: 4px;
    border-left: 4px solid;
}

.alert-success {
    background-color: #f1f8e9;
    border-left-color: var(--success-color);
    color: #33691e;
}

.alert-danger {
    background-color: #ffebee;
    border-left-color: var(--danger-color);
    color: #b71c1c;
}

.alert-warning {
    background-color: #fff3e0;
    border-left-color: var(--warning-color);
    color: #e65100;
}

.alert-info {
    background-color: #e3f2fd;
    border-left-color: var(--primary-color);
    color: #0d47a1;
}

/* Tablas */
.table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 1.5rem;
}

.table thead {
    background-color: var(--light-bg);
    border-bottom: 2px solid var(--border-color);
}

.table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--text-primary);
}

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

.table tr:hover {
    background-color: var(--light-bg);
}

/* Grid */
.grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Dashboard cards */
.dashboard-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 1.5rem;
    text-align: center;
}

.dashboard-card h3 {
    font-size: 2rem;
    margin: 1rem 0;
    color: var(--primary-color);
}

.dashboard-card p {
    color: var(--text-secondary);
}

/* Badge */
.badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.85rem;
    font-weight: 600;
}

.badge-success {
    background-color: #c8e6c9;
    color: #1b5e20;
}

.badge-danger {
    background-color: #ffcdd2;
    color: #b71c1c;
}

.badge-warning {
    background-color: #ffe0b2;
    color: #e65100;
}

.badge-info {
    background-color: #bbdefb;
    color: #0d47a1;
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid var(--border-color);
    border-radius: 50%;
    border-top: 3px solid var(--primary-color);
    animation: spin 1s linear infinite;
}

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

/* Footer */
footer {
    background-color: #fff;
    border-top: 1px solid var(--border-color);
    padding: 2rem 0;
    margin-top: 3rem;
    text-align: center;
    color: var(--text-secondary);
}

/* Responsive */
@media (max-width: 768px) {
    .navbar-menu {
        gap: 1rem;
    }
    
    .grid {
        grid-template-columns: 1fr;
    }
    
    .table {
        font-size: 0.9rem;
    }
    
    .table th,
    .table td {
        padding: 0.5rem;
    }
}