/* ===========================================
   Variables CSS
   =========================================== */
:root {
    --primary: #3B82F6;
    --primary-dark: #2563EB;
    --success: #10B981;
    --danger: #EF4444;
    --warning: #F59E0B;
    --info: #8B5CF6;
    --dark: #1F2937;
    --light: #F3F4F6;
    --border: #E5E7EB;
    --text: #374151;
    --text-muted: #6B7280;
    --sidebar-width: 260px;
    --topbar-height: 70px;
}

/* ===========================================
   Reset y Base
   =========================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--light);
    color: var(--text);
    line-height: 1.6;
}

/* ===========================================
   Login Screen
   =========================================== */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--info) 100%);
}

.login-box {
    background: white;
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
    width: 100%;
    max-width: 400px;
}

.logo {
    text-align: center;
    margin-bottom: 30px;
}

.logo i {
    font-size: 48px;
    color: var(--primary);
    margin-bottom: 10px;
}

.logo h1 {
    font-size: 32px;
    color: var(--dark);
    margin: 0;
}

.login-box h2 {
    text-align: center;
    margin-bottom: 30px;
    color: var(--dark);
}

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

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

.form-group label i {
    margin-right: 5px;
    color: var(--primary);
}

.form-group input {
    width: 100%;
    padding: 12px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.3s;
}

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

/* ===========================================
   Buttons
   =========================================== */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

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

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

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

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

.btn-logout {
    background: transparent;
    color: var(--text-muted);
    padding: 8px 16px;
    font-size: 13px;
}

.btn-logout:hover {
    background: var(--light);
    color: var(--danger);
}

/* ===========================================
   Dashboard Layout
   =========================================== */
#dashboard-screen {
    display: flex;
    height: 100vh;
}

.sidebar {
    width: var(--sidebar-width);
    background: var(--dark);
    color: white;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
}

.sidebar-header {
    padding: 25px 20px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    display: flex;
    align-items: center;
    gap: 12px;
}

.sidebar-header i {
    font-size: 28px;
    color: var(--primary);
}

.sidebar-header h3 {
    margin: 0;
    font-size: 20px;
}

.sidebar-nav {
    flex: 1;
    padding: 20px 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    color: rgba(255,255,255,0.7);
    text-decoration: none;
    transition: all 0.3s;
    border-left: 3px solid transparent;
}

.nav-item:hover {
    background: rgba(255,255,255,0.05);
    color: white;
}

.nav-item.active {
    background: rgba(59, 130, 246, 0.1);
    color: white;
    border-left-color: var(--primary);
}

.nav-item i {
    font-size: 18px;
    width: 20px;
}

.sidebar-footer {
    padding: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.user-info {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
    color: rgba(255,255,255,0.9);
}

.user-info i {
    font-size: 24px;
}

/* ===========================================
   Main Content
   =========================================== */
.main-content {
    margin-left: var(--sidebar-width);
    flex: 1;
    display: flex;
    flex-direction: column;
}

.topbar {
    height: var(--topbar-height);
    background: white;
    border-bottom: 1px solid var(--border);
    padding: 0 30px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.topbar h1 {
    font-size: 24px;
    color: var(--dark);
}

.badge {
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

#status-badge {
    background: #D1FAE5;
    color: var(--success);
}

#status-badge i {
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.content-area {
    flex: 1;
    padding: 30px;
    overflow-y: auto;
}

.page-content {
    display: none;
}

.page-content.active {
    display: block;
}

/* ===========================================
   Stats Cards
   =========================================== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: white;
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    display: flex;
    align-items: center;
    gap: 20px;
    transition: transform 0.3s, box-shadow 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
}

.stat-icon.blue { background: var(--primary); }
.stat-icon.green { background: var(--success); }
.stat-icon.purple { background: var(--info); }
.stat-icon.orange { background: var(--warning); }

.stat-info h3 {
    font-size: 32px;
    margin: 0;
    color: var(--dark);
}

.stat-info p {
    margin: 0;
    color: var(--text-muted);
    font-size: 14px;
}

/* ===========================================
   Cards
   =========================================== */
.card {
    background: white;
    border-radius: 12px;
    padding: 25px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    margin-bottom: 20px;
}

.card h3 {
    margin: 0 0 20px 0;
    color: var(--dark);
    display: flex;
    align-items: center;
    gap: 10px;
}

.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
}

/* ===========================================
   Tables
   =========================================== */
.table-container {
    overflow-x: auto;
}

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

.data-table thead {
    background: var(--light);
}

.data-table th {
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
    color: var(--dark);
    border-bottom: 2px solid var(--border);
}

.data-table td {
    padding: 12px 15px;
    border-bottom: 1px solid var(--border);
}

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

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

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

/* ===========================================
   Forms
   =========================================== */
.form-control {
    padding: 10px 15px;
    border: 2px solid var(--border);
    border-radius: 8px;
    font-size: 14px;
}

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

.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.filters {
    display: flex;
    gap: 10px;
}

/* ===========================================
   Categories
   =========================================== */
.categories-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 15px;
}

.category-card {
    background: white;
    border-radius: 12px;
    padding: 20px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.08);
    border-left: 4px solid;
    transition: transform 0.3s;
}

.category-card:hover {
    transform: translateY(-3px);
}

.category-card h4 {
    margin: 0 0 5px 0;
    color: var(--dark);
}

.category-card p {
    margin: 0;
    font-size: 13px;
    color: var(--text-muted);
}

/* ===========================================
   Modal
   =========================================== */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: 12px;
    width: 90%;
    max-width: 600px;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    padding: 20px 25px;
    border-bottom: 1px solid var(--border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h3 {
    margin: 0;
}

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

.close-btn:hover {
    color: var(--danger);
}

.modal-body {
    padding: 25px;
}

/* ===========================================
   Status Badges
   =========================================== */
.status-badge {
    padding: 4px 12px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 600;
}

.status-pendiente {
    background: #FEF3C7;
    color: #92400E;
}

.status-confirmada {
    background: #DBEAFE;
    color: #1E40AF;
}

.status-completada {
    background: #D1FAE5;
    color: #065F46;
}

.status-cancelada {
    background: #FEE2E2;
    color: #991B1B;
}

/* ===========================================
   Error Message
   =========================================== */
.error-message {
    background: #FEE2E2;
    color: #991B1B;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid var(--danger);
}

.success-message {
    background: #D1FAE5;
    color: #065F46;
    padding: 12px;
    border-radius: 8px;
    margin-top: 15px;
    border-left: 4px solid var(--success);
}

/* ===========================================
   Responsive
   =========================================== */
@media (max-width: 768px) {
    :root {
        --sidebar-width: 70px;
    }
    
    .sidebar-header h3,
    .nav-item span,
    .user-info span {
        display: none;
    }
    
    .main-content {
        margin-left: 70px;
    }
}