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

:root {
    --primary: #667eea;
    --primary-dark: #5568d3;
    --secondary: #764ba2;
    --success: #10b981;
    --danger: #ef4444;
    --warning: #f59e0b;
    --info: #0ea5e9;
    --gray-50: #f9fafb;
    --gray-100: #f3f4f6;
    --gray-200: #e5e7eb;
    --gray-300: #d1d5db;
    --gray-400: #9ca3af;
    --gray-500: #6b7280;
    --gray-600: #4b5563;
    --gray-700: #374151;
    --gray-800: #1f2937;
    --gray-900: #111827;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);
    --border-radius: 0.5rem;
    --transition: all 0.3s ease;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--gray-50);
    color: var(--gray-800);
    line-height: 1.6;
}

/* Auth Pages */
.auth-body {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
}

.auth-container {
    width: 100%;
    max-width: 420px;
    padding: 20px;
}

.auth-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    padding: 40px;
}

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

.brand-logo {
    font-size: 28px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 8px;
}

.brand-tagline {
    color: var(--gray-500);
    font-size: 14px;
}

.auth-form h2 {
    font-size: 24px;
    margin-bottom: 20px;
    color: var(--gray-900);
}

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

.form-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    font-size: 14px;
    transition: var(--transition);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.password-wrapper {
    position: relative;
}

.toggle-password {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    cursor: pointer;
    font-size: 18px;
}

.password-strength {
    margin-top: 8px;
    display: flex;
    gap: 8px;
    align-items: center;
}

.strength-bar {
    height: 4px;
    background-color: var(--gray-200);
    border-radius: 2px;
    flex: 1;
    background: linear-gradient(90deg, transparent 0%, var(--danger) 100%);
}

.strength-bar.weak {
    background: linear-gradient(90deg, transparent 0%, var(--danger) 100%);
}

.strength-bar.medium {
    background: linear-gradient(90deg, transparent 0%, var(--warning) 100%);
}

.strength-bar.strong {
    background: linear-gradient(90deg, transparent 0%, var(--success) 100%);
}

.strength-text {
    font-size: 12px;
    color: var(--gray-600);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--gray-700);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

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

.checkbox-label a:hover {
    text-decoration: underline;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    display: inline-block;
    text-align: center;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    width: 100%;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-outline:hover {
    background: rgba(102, 126, 234, 0.1);
}

.btn-sm {
    padding: 8px 16px;
    font-size: 12px;
}

.auth-footer {
    text-align: center;
    margin-top: 20px;
    color: var(--gray-600);
    font-size: 14px;
}

.link-primary {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.link-primary:hover {
    text-decoration: underline;
}

/* Alerts */
.error-alert,
.success-alert {
    padding: 12px;
    border-radius: var(--border-radius);
    margin-bottom: 20px;
    font-size: 14px;
}

.error-alert {
    background-color: #fee;
    color: var(--danger);
    border: 1px solid #fcc;
}

.success-alert {
    background-color: #efe;
    color: var(--success);
    border: 1px solid #cfc;
}

/* App Layout */
.app-wrapper {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 250px;
    background: var(--gray-900);
    color: white;
    padding: 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    box-shadow: var(--shadow-lg);
}

.sidebar-header {
    margin-bottom: 30px;
}

.sidebar-header h1 {
    font-size: 20px;
}

.sidebar-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--border-radius);
    color: var(--gray-400);
    text-decoration: none;
    transition: var(--transition);
    font-size: 14px;
}

.nav-item:hover,
.nav-item.active {
    background-color: rgba(102, 126, 234, 0.1);
    color: var(--primary);
}

.sidebar-footer {
    margin-top: auto;
    padding-top: 20px;
    border-top: 1px solid var(--gray-700);
}

.logout-btn {
    display: block;
    padding: 12px;
    text-align: center;
    background-color: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-radius: var(--border-radius);
    text-decoration: none;
    transition: var(--transition);
}

.logout-btn:hover {
    background-color: rgba(239, 68, 68, 0.2);
}

.main-content {
    margin-left: 250px;
    flex: 1;
    padding: 20px;
}

.top-header {
    background: white;
    padding: 20px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.top-header h2 {
    font-size: 24px;
    color: var(--gray-900);
}

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.user-menu {
    position: relative;
}

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    cursor: pointer;
    transition: var(--transition);
}

.user-avatar:hover {
    transform: scale(1.1);
}

.user-dropdown {
    position: absolute;
    top: 50px;
    right: 0;
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    min-width: 200px;
    display: none;
    z-index: 100;
}

.user-avatar:hover + .user-dropdown,
.user-dropdown:hover {
    display: block;
}

.user-dropdown p {
    padding: 8px 16px;
    font-size: 14px;
}

.user-name {
    font-weight: 600;
    color: var(--gray-900);
}

.user-email {
    color: var(--gray-600);
    font-size: 12px;
}

.user-dropdown a {
    display: block;
    padding: 10px 16px;
    color: var(--gray-700);
    text-decoration: none;
    transition: var(--transition);
    font-size: 13px;
}

.user-dropdown a:hover {
    background-color: var(--gray-50);
    color: var(--primary);
}

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

.stat-card {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    display: flex;
    gap: 16px;
    transition: var(--transition);
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    flex-shrink: 0;
}

.stat-label {
    font-size: 12px;
    color: var(--gray-600);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--gray-900);
    margin-top: 8px;
}

/* Section */
.section {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    padding: 20px;
    margin-bottom: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 16px;
    border-bottom: 1px solid var(--gray-200);
}

.section-header h3 {
    font-size: 18px;
    color: var(--gray-900);
}

/* Table */
.table-responsive {
    overflow-x: auto;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 14px;
}

.data-table thead {
    background-color: var(--gray-50);
    border-bottom: 1px solid var(--gray-200);
}

.data-table th {
    padding: 12px;
    text-align: left;
    font-weight: 600;
    color: var(--gray-700);
}

.data-table td {
    padding: 12px;
    border-bottom: 1px solid var(--gray-100);
}

.table-row-hover:hover {
    background-color: var(--gray-50);
}

/* Badges */
.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 999px;
    font-size: 12px;
    font-weight: 600;
}

.badge-success {
    background-color: #d1fae5;
    color: #065f46;
}

.badge-warning {
    background-color: #fef3c7;
    color: #92400e;
}

.badge-danger {
    background-color: #fee2e2;
    color: #991b1b;
}

.badge-info {
    background-color: #e0f2fe;
    color: #0c4a6e;
}

/* Progress Bar */
.progress-bar {
    height: 6px;
    background-color: var(--gray-200);
    border-radius: 999px;
    overflow: hidden;
    margin-bottom: 4px;
}

.progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 999px;
    transition: width 0.3s ease;
}

.progress-text {
    font-size: 12px;
    color: var(--gray-600);
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--gray-600);
}

/* Email Composer */
.email-composer {
    max-width: 800px;
}

.form-row {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.form-actions {
    display: flex;
    gap: 12px;
    margin-top: 24px;
}

#editor {
    background-color: white;
    border: 1px solid var(--gray-300);
    border-radius: var(--border-radius);
    min-height: 300px;
    margin-bottom: 12px;
}

/* Responsive */
@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 1000;
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .top-header {
        flex-direction: column;
        gap: 16px;
    }
}

/* Recipients Input Styling */
.recipients-input-container {
    border: 1px solid #ddd;
    border-radius: 4px;
    padding: 8px;
    background-color: #fff;
    min-height: 45px;
}

.recipient-input {
    border: none;
    outline: none;
    padding: 8px;
    font-size: 14px;
    width: 100%;
    background: transparent;
}

.recipients-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 8px;
}

.recipient-tag {
    background-color: #007bff;
    color: white;
    padding: 6px 12px;
    border-radius: 20px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 13px;
}

.recipient-tag button {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    font-size: 16px;
    padding: 0;
    line-height: 1;
}

.recipient-tag button:hover {
    opacity: 0.8;
}

.recipients-input-container:focus-within {
    border-color: #0056b3;
    box-shadow: 0 0 0 3px rgba(0, 123, 255, 0.25);
}