:root {
    --primary: #4F46E5;
    --primary-hover: #4338CA;
    --bg-color: #F3F4F6;
    --sidebar-bg: #FFFFFF;
    --card-bg: #FFFFFF;
    --text-main: #111827;
    --text-muted: #6B7280;
    --border-color: #E5E7EB;
    --danger: #EF4444;
    --success: #10B981;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    overflow-x: hidden;
}

/* Typography & Utils */
h1, h2, h3, h4, h5, h6 { font-weight: 600; }
a { text-decoration: none; color: inherit; }
.text-center { text-align: center; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 16px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    text-decoration: none;
    white-space: nowrap;
}
.btn-primary {
    background-color: var(--primary);
    color: white;
}
.btn-primary:hover {
    background-color: var(--primary-hover);
}
.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-main);
}
.btn-outline:hover {
    background-color: #F9FAFB;
}
.btn-block {
    width: 100%;
}
.no-text i {
    margin: 0;
}

/* Alert */
.alert {
    padding: 12px;
    border-radius: 8px;
    margin-bottom: 16px;
    font-size: 14px;
}
.alert-danger {
    background-color: #FEF2F2;
    color: #991B1B;
    border: 1px solid #F87171;
}

/* Login Page */
.login-bg {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
}
.login-container {
    width: 100%;
    max-width: 400px;
    padding: 20px;
}
.login-card {
    background: white;
    padding: 40px;
    border-radius: 16px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.1);
}
.login-card h2 {
    font-size: 24px;
    margin-bottom: 8px;
}
.login-card .subtitle {
    color: var(--text-muted);
    margin-bottom: 24px;
    font-size: 14px;
}
.form-group {
    margin-bottom: 20px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 14px;
    font-weight: 500;
}
.form-group input, .form-group select {
    width: 100%;
    padding: 10px 14px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.form-group input:focus, .form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Dashboard Layout */
.dashboard-container {
    display: flex;
    height: 100vh;
    overflow: hidden;
}

/* Sidebar */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
}
.sidebar-header {
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid var(--border-color);
}
.sidebar-header h2 {
    font-size: 20px;
    color: var(--primary);
}
.logo-icon {
    stroke: var(--primary);
}
.nav-links {
    list-style: none;
    padding: 24px 16px;
    flex-grow: 1;
}
.nav-links li {
    margin-bottom: 8px;
}
.nav-links a {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: 8px;
    color: var(--text-muted);
    font-weight: 500;
    transition: all 0.2s;
}
.nav-links a:hover {
    background-color: #F9FAFB;
    color: var(--primary);
}
.nav-links li.active a {
    background-color: #EEF2FF;
    color: var(--primary);
}
.nav-links a i {
    width: 20px;
    height: 20px;
}
.badge {
    background-color: var(--primary);
    color: white;
    font-size: 12px;
    padding: 2px 8px;
    border-radius: 12px;
    margin-left: auto;
}
.logout {
    margin-top: auto;
}
.logout a {
    color: var(--danger);
}
.logout a:hover {
    background-color: #FEF2F2;
    color: var(--danger);
}

/* Main Content */
.main-content {
    flex-grow: 1;
    overflow-y: auto;
    padding: 32px;
}
.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
}
.header-title h1 {
    font-size: 28px;
    margin-bottom: 4px;
}
.header-title p {
    color: var(--text-muted);
}
.header-actions {
    display: flex;
    gap: 16px;
}

/* Filters */
.filters-section {
    background: var(--card-bg);
    padding: 20px;
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    margin-bottom: 24px;
}
.filter-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}
.filter-group {
    position: relative;
    flex-grow: 1;
}
.filter-group i {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    width: 18px;
}
.filter-group input[type="text"] {
    width: 100%;
    padding: 12px 12px 12px 42px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    transition: border-color 0.2s;
    box-sizing: border-box;
}
.filter-group input[type="text"]:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}
.filter-group-row {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    align-items: flex-end;
}
.filter-group.sm {
    flex-grow: 1;
    min-width: 150px;
}
.filter-group.sm label {
    display: block;
    margin-bottom: 6px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-muted);
}
.filter-group.sm input, .filter-group.sm select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    box-sizing: border-box;
    height: 40px;
}

/* Table */
.data-section {
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    overflow: hidden;
}
.table-container {
    overflow-x: auto;
}
.leads-table {
    width: 100%;
    border-collapse: collapse;
}
.leads-table th, .leads-table td {
    padding: 16px 24px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}
.leads-table th {
    background: #F9FAFB;
    color: var(--text-muted);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}
.leads-table td {
    font-size: 14px;
    vertical-align: middle;
}
.leads-table tr:hover {
    background-color: #F9FAFB;
}
.contact-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}
.contact-info small {
    display: flex;
    align-items: center;
    gap: 6px;
    color: var(--text-muted);
}
.contact-info small i {
    width: 14px;
    height: 14px;
}
.source-tag {
    display: inline-block;
    padding: 4px 10px;
    background: #EEF2FF;
    color: var(--primary);
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    text-transform: capitalize;
}
.status-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 16px;
    font-size: 12px;
    font-weight: 500;
    background: #F3F4F6;
    color: #4B5563;
}
.status-badge.new {
    background: #D1FAE5;
    color: #065F46;
}

/* Pagination */
.pagination {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 24px;
    border-top: 1px solid var(--border-color);
}
.page-info {
    font-size: 14px;
    color: var(--text-muted);
}
.page-links {
    display: flex;
    gap: 4px;
}
.btn-page {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 14px;
    color: var(--text-main);
    display: inline-flex;
    align-items: center;
    gap: 4px;
}
.btn-page:hover {
    background: #F9FAFB;
}
.btn-page.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}
.btn-page.disabled {
    opacity: 0.5;
    pointer-events: none;
}
.btn-page i {
    width: 16px;
    height: 16px;
}

@media (max-width: 768px) {
    .dashboard-container {
        flex-direction: column;
    }
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    .nav-links {
        display: flex;
        overflow-x: auto;
        padding: 16px;
    }
    .nav-links li {
        margin-bottom: 0;
        margin-right: 8px;
        white-space: nowrap;
    }
    .main-content {
        padding: 20px;
    }
    .top-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }
    .filter-group-row {
        flex-direction: column;
        align-items: stretch;
    }
    .pagination {
        flex-direction: column;
        gap: 16px;
    }
}