/* ============================================
   DEEP MAILER - ESTILOS MODERNOS
   ============================================ */

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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #27ae60;
    --danger: #e74c3c;
    --warning: #f39c12;
    --info: #3498db;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --white: #ffffff;
    --gray: #95a5a6;
    --border: #e0e0e0;
    --shadow: rgba(0, 0, 0, 0.1);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    color: #333;
    line-height: 1.6;
}

/* ============================================
   NAVBAR
   ============================================ */

.navbar {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 30px;
    box-shadow: 0 2px 10px var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.navbar-brand h1 {
    color: var(--primary);
    font-size: 24px;
    font-weight: 700;
}

.navbar-menu {
    display: flex;
    gap: 15px;
}

.nav-link {
    text-decoration: none;
    color: #333;
    font-weight: 500;
    padding: 8px 15px;
    border-radius: 5px;
    transition: all 0.3s;
}

.nav-link:hover {
    background: var(--light);
    color: var(--primary);
}

/* ============================================
   CONTAINER
   ============================================ */

.container {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 20px;
}

/* ============================================
   CARDS
   ============================================ */

.card {
    background: var(--white);
    border-radius: 15px;
    padding: 30px;
    margin-bottom: 25px;
    box-shadow: 0 4px 15px var(--shadow);
    transition: transform 0.3s, box-shadow 0.3s;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

.card h2 {
    color: var(--primary);
    margin-bottom: 25px;
    font-size: 24px;
    font-weight: 600;
    border-bottom: 2px solid var(--light);
    padding-bottom: 10px;
}

/* ============================================
   STATS GRID
   ============================================ */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

.stat-card {
    background: var(--white);
    padding: 25px;
    border-radius: 15px;
    text-align: center;
    box-shadow: 0 4px 15px var(--shadow);
    transition: transform 0.3s;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-icon {
    font-size: 40px;
    margin-bottom: 10px;
}

.stat-value {
    font-size: 36px;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: 5px;
}

.stat-label {
    color: var(--gray);
    font-size: 14px;
    font-weight: 500;
}

/* ============================================
   FORMS
   ============================================ */

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #333;
    font-weight: 600;
    font-size: 14px;
}

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

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

.form-group textarea {
    min-height: 150px;
    font-family: 'Courier New', monospace;
    resize: vertical;
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--gray);
    font-size: 12px;
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    display: inline-block;
    padding: 12px 24px;
    background: var(--primary);
    color: var(--white);
    text-decoration: none;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    font-size: 14px;
    font-weight: 600;
    transition: all 0.3s;
    text-align: center;
}

.btn:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-block {
    width: 100%;
    display: block;
}

.btn-large {
    padding: 15px 30px;
    font-size: 16px;
}

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

.btn-success:hover {
    background: #229954;
}

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

.btn-danger:hover {
    background: #c0392b;
}

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

.btn-secondary:hover {
    background: #7f8c8d;
}

/* ============================================
   TABLES
   ============================================ */

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 20px;
}

table th,
table td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border);
}

table th {
    background: var(--light);
    font-weight: 600;
    color: #333;
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

table tr:hover {
    background: #f8f9fa;
}

/* ============================================
   BADGES
   ============================================ */

.badge {
    display: inline-block;
    padding: 5px 12px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background: #d4edda;
    color: #155724;
}

.badge-warning {
    background: #fff3cd;
    color: #856404;
}

.badge-secondary {
    background: var(--light);
    color: #6c757d;
}

/* ============================================
   ALERTS
   ============================================ */

.alert {
    padding: 15px 20px;
    margin-bottom: 20px;
    border-radius: 8px;
    border-left: 4px solid;
}

.alert-success {
    background: #d4edda;
    color: #155724;
    border-color: var(--success);
}

.alert-error {
    background: #f8d7da;
    color: #721c24;
    border-color: var(--danger);
}

.alert-info {
    background: #d1ecf1;
    color: #0c5460;
    border-color: var(--info);
}

.alert-warning {
    background: #fff3cd;
    color: #856404;
    border-color: var(--warning);
}

/* ============================================
   LOGIN PAGE
   ============================================ */

.login-page {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}

.login-card {
    background: var(--white);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
}

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

.login-header h1 {
    color: var(--primary);
    font-size: 32px;
    margin-bottom: 10px;
}

.login-header p {
    color: var(--gray);
    font-size: 14px;
}

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

.login-footer {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--border);
    font-size: 12px;
    color: var(--gray);
}

/* ============================================
   DASHBOARD
   ============================================ */

.dashboard h1 {
    color: var(--white);
    margin-bottom: 30px;
    font-size: 32px;
    text-shadow: 2px 2px 4px rgba(0, 0, 0, 0.2);
}

.action-buttons {
    text-align: center;
    margin-top: 30px;
}

/* ============================================
   EMPTY STATE
   ============================================ */

.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--gray);
    font-size: 16px;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: rgba(255, 255, 255, 0.1);
    color: var(--white);
    text-align: center;
    padding: 20px;
    margin-top: 50px;
    border-radius: 10px 10px 0 0;
}

/* ============================================
   RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 15px;
    }
    
    .navbar-menu {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .container {
        padding: 0 15px;
    }
    
    table {
        font-size: 12px;
    }
    
    table th,
    table td {
        padding: 10px 5px;
    }
}

/* ============================================
   UTILITIES
   ============================================ */

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

.mt-20 {
    margin-top: 20px;
}

.mb-20 {
    margin-bottom: 20px;
}