/* ==========================================
   VARIABLES Y RESET
   ========================================== */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --shadow: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --radius: 8px;
    --transition: all 0.2s ease;
}

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

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

/* ==========================================
   LAYOUT FORMULARIO (50/50)
   ========================================== */
.lead-form-container {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

.lead-form-image {
    flex: 1;
    background-color: #1e293b;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

.lead-form-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.lead-form-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 40px;
    background: var(--surface);
}

.lead-form-wrapper {
    width: 100%;
    max-width: 450px;
}

/* ==========================================
   FORMULARIO
   ========================================== */
.form-header {
    margin-bottom: 32px;
    text-align: center;
}

.form-header h1 {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 15px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.form-group label .required {
    color: var(--error-color);
}

.form-group label .optional {
    color: var(--text-secondary);
    font-weight: 400;
    font-size: 12px;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    font-size: 15px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    background: var(--surface);
    color: var(--text-primary);
    transition: var(--transition);
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.form-group input.error {
    border-color: var(--error-color);
}

.form-group input.success {
    border-color: var(--success-color);
}

.form-group .error-message {
    color: var(--error-color);
    font-size: 13px;
    margin-top: 4px;
    display: none;
}

.form-group.has-error .error-message {
    display: block;
}

/* ==========================================
   BOTONES
   ========================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
}

.btn-primary {
    width: 100%;
    background: var(--primary-color);
    color: white;
}

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

.btn-primary:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
}

.btn-secondary {
    background: var(--background);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

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

/* ==========================================
   ALERTAS Y MENSAJES
   ========================================== */
.alert {
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    display: none;
}

.alert.show {
    display: block;
}

.alert-success {
    background: #dcfce7;
    color: #166534;
    border: 1px solid #bbf7d0;
}

.alert-error {
    background: #fef2f2;
    color: #991b1b;
    border: 1px solid #fecaca;
}

.alert-warning {
    background: #fffbeb;
    color: #92400e;
    border: 1px solid #fde68a;
}

/* ==========================================
   SPINNER / LOADING
   ========================================== */
.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.btn .spinner {
    width: 18px;
    height: 18px;
}

/* ==========================================
   ADMIN PANEL
   ========================================== */
.admin-container {
    min-height: 100vh;
    background: var(--background);
}

.admin-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.admin-header h1 {
    font-size: 20px;
    font-weight: 600;
}

.admin-header .user-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.admin-content {
    padding: 24px;
    max-width: 1800px;
    margin: 0 auto;
}

/* Stats Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 24px;
}

.stat-card {
    background: var(--surface);
    padding: 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.stat-card .stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--text-primary);
}

.stat-card .stat-label {
    font-size: 14px;
    color: var(--text-secondary);
    margin-top: 4px;
}

.stat-card.success .stat-value { color: var(--success-color); }
.stat-card.error .stat-value { color: var(--error-color); }
.stat-card.warning .stat-value { color: var(--warning-color); }

/* Filtros */
.filters-bar {
    background: var(--surface);
    padding: 16px;
    border-radius: var(--radius);
    margin-bottom: 16px;
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    align-items: center;
}

.filters-bar select,
.filters-bar input {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 14px;
}

/* Tabla */
.table-container {
    background: var(--surface);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

.data-table th {
    background: var(--background);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

.data-table tr:hover {
    background: var(--background);
}

.data-table td {
    font-size: 14px;
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 500;
    border-radius: 20px;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

.badge-error {
    background: #fef2f2;
    color: #991b1b;
}

.badge-warning {
    background: #fffbeb;
    color: #92400e;
}

.badge-pending {
    background: #e0e7ff;
    color: #3730a3;
}

/* Paginación */
.pagination {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 8px;
    padding: 16px;
}

.pagination button {
    padding: 8px 16px;
    border: 1px solid var(--border-color);
    background: var(--surface);
    border-radius: var(--radius);
    cursor: pointer;
    transition: var(--transition);
}

.pagination button:hover:not(:disabled) {
    background: var(--background);
}

.pagination button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.pagination .page-info {
    color: var(--text-secondary);
    font-size: 14px;
}

/* ==========================================
   LOGIN PAGE
   ========================================== */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--background);
    padding: 20px;
}

.login-box {
    background: var(--surface);
    padding: 40px;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    text-align: center;
    margin-bottom: 8px;
}

.login-box p {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 24px;
}

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 768px) {
    .lead-form-container {
        flex-direction: column;
    }

    .lead-form-image {
        height: 200px;
        flex: none;
    }

    .lead-form-content {
        padding: 24px;
    }

    .admin-header {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }

    .filters-bar {
        flex-direction: column;
    }

    .filters-bar select,
    .filters-bar input {
        width: 100%;
    }

    .data-table {
        font-size: 13px;
    }

    .data-table th,
    .data-table td {
        padding: 8px 12px;
    }
}