:root {
    --primary-color: #1a73e8;
    --primary-hover: #1557b0;
    --secondary-color: #5f6368;
    --success-color: #34a853;
    --warning-color: #fbbc04;
    --danger-color: #ea4335;
    --bg-color: #f8f9fa;
    --card-bg: #ffffff;
    --border-color: #dadce0;
    --text-primary: #202124;
    --text-secondary: #5f6368;
    --shadow-sm: 0 1px 2px rgba(60, 64, 67, 0.1);
    --shadow-md: 0 1px 3px rgba(60, 64, 67, 0.15), 0 4px 8px rgba(60, 64, 67, 0.1);
    --shadow-lg: 0 1px 3px rgba(60, 64, 67, 0.2), 0 8px 16px rgba(60, 64, 67, 0.15);
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --transition: all 0.2s ease;
}

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

.header {
    background: var(--card-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.header-content {
    max-width: 1600px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    flex-shrink: 0;
}

.logo-icon {
    width: 32px;
    height: 32px;
    background: linear-gradient(135deg, #4285f4, #34a853, #fbbc04, #ea4335);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 700;
    font-size: 18px;
}

.logo-text {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
}

.mcc-display {
    background: linear-gradient(135deg, #e8f0fe, #e6f4ea);
    padding: 8px 16px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: 8px;
}

.mcc-label {
    font-weight: 600;
    color: var(--text-secondary);
    font-size: 13px;
}

.mcc-value {
    font-weight: 700;
    color: var(--primary-color);
    font-size: 14px;
    font-family: 'Roboto Mono', monospace;
}

.nav {
    display: flex;
    align-items: center;
    gap: 16px;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.nav-item label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    transition: var(--transition);
    font-size: 14px;
}

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

.nav-link.active {
    background: var(--primary-color);
    color: white;
}

.main-content {
    max-width: 1600px;
    margin: 0 auto;
    padding: 24px;
}

.cards-container {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 24px;
}

@media (max-width: 1200px) {
    .cards-container {
        grid-template-columns: 1fr;
    }
}

.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

.card-header {
    background: linear-gradient(135deg, #f8f9fa, #fff);
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-title {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.card-mcc {
    font-size: 13px;
    color: var(--text-secondary);
}

.card-mcc span {
    font-weight: 600;
    color: var(--primary-color);
}

.card-body {
    padding: 24px;
}

.select-input,
.text-input,
textarea {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--card-bg);
    transition: var(--transition);
}

.select-input:focus,
.text-input:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.2);
}

.select-input:disabled,
.text-input:disabled,
.text-input[readonly] {
    background: var(--bg-color);
    color: var(--text-secondary);
    cursor: not-allowed;
}

textarea {
    resize: vertical;
    min-height: 80px;
}

.campaign-rows {
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-height: 600px;
    overflow-y: auto;
    padding-right: 8px;
}

.campaign-row {
    background: var(--bg-color);
    border-radius: var(--radius-md);
    padding: 20px;
    position: relative;
    border: 1px solid var(--border-color);
}

.campaign-row-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border-color);
}

.campaign-row-title {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.remove-row-btn {
    background: none;
    border: none;
    color: var(--danger-color);
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    transition: var(--transition);
}

.remove-row-btn:hover {
    background: rgba(234, 67, 53, 0.1);
}

.campaign-row-content {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 16px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.form-group.full-width {
    grid-column: 1 / -1;
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

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

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary-color);
}

.multi-select {
    position: relative;
}

.multi-select-trigger {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 14px;
    color: var(--text-primary);
    background: var(--card-bg);
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition);
}

.multi-select-trigger:hover {
    border-color: var(--primary-color);
}

.multi-select-trigger::after {
    content: '\u25BC';
    font-size: 10px;
    color: var(--text-secondary);
}

.multi-select-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-lg);
    max-height: 200px;
    overflow-y: auto;
    z-index: 50;
    display: none;
}

.multi-select-dropdown.open {
    display: block;
}

.multi-select-option {
    padding: 10px 12px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: var(--transition);
}

.multi-select-option:hover {
    background: var(--bg-color);
}

.multi-select-option.selected {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary-color);
}

.form-row {
    display: grid;
    gap: 16px;
    margin-bottom: 16px;
}

.form-row.two-col {
    grid-template-columns: 1fr 1fr;
}

.form-row.three-col {
    grid-template-columns: 1fr 1fr 1fr;
}

@media (max-width: 768px) {
    .form-row.two-col,
    .form-row.three-col {
        grid-template-columns: 1fr;
    }
}

.card-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    margin-top: 24px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.btn {
    padding: 10px 24px;
    border: none;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

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

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

.btn-secondary:hover {
    background: rgba(26, 115, 232, 0.05);
}

.btn-icon {
    font-size: 18px;
    font-weight: 700;
}

.btn-large {
    padding: 14px 32px;
    font-size: 16px;
}

.edit-ads-container {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.cid-selector-card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.campaign-data {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.campaign-data.hidden {
    display: none;
}

.summary-cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 16px;
}

@media (max-width: 1024px) {
    .summary-cards {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 600px) {
    .summary-cards {
        grid-template-columns: 1fr;
    }
}

.summary-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 20px;
    box-shadow: var(--shadow-sm);
    display: flex;
    align-items: center;
    gap: 16px;
    border: 1px solid var(--border-color);
}

.summary-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.summary-icon svg {
    width: 24px;
    height: 24px;
}

.clicks-icon {
    background: rgba(26, 115, 232, 0.1);
    color: var(--primary-color);
}

.impressions-icon {
    background: rgba(52, 168, 83, 0.1);
    color: var(--success-color);
}

.cpc-icon {
    background: rgba(251, 188, 4, 0.1);
    color: var(--warning-color);
}

.cost-icon {
    background: rgba(234, 67, 53, 0.1);
    color: var(--danger-color);
}

.summary-content {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.summary-label {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
}

.summary-value {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
}

.data-tables {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

@media (max-width: 1024px) {
    .data-tables {
        grid-template-columns: 1fr;
    }
}

.table-card {
    background: var(--card-bg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.table-header {
    padding: 16px 20px;
    background: var(--bg-color);
    border-bottom: 1px solid var(--border-color);
}

.table-header h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
}

.table-wrapper {
    overflow-x: auto;
}

.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(--bg-color);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    font-size: 14px;
    color: var(--text-primary);
}

.data-table tbody tr:hover {
    background: rgba(26, 115, 232, 0.02);
}

.data-table .select-input,
.data-table .text-input {
    padding: 6px 10px;
    font-size: 13px;
}

.save-actions {
    display: flex;
    justify-content: center;
    padding: 16px 0;
}

.toast {
    position: fixed;
    bottom: 24px;
    right: 24px;
    padding: 16px 24px;
    background: var(--text-primary);
    color: white;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    opacity: 0;
    transform: translateY(20px);
    transition: var(--transition);
    z-index: 1000;
    max-width: 400px;
}

.toast.show {
    opacity: 1;
    transform: translateY(0);
}

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

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

.toast.warning {
    background: var(--warning-color);
    color: var(--text-primary);
}

@media (max-width: 768px) {
    .header-content {
        flex-wrap: wrap;
        height: auto;
        padding: 12px 0;
        gap: 12px;
    }

    .nav {
        width: 100%;
        justify-content: center;
        flex-wrap: wrap;
    }

    .main-content {
        padding: 16px;
    }

    .card-body {
        padding: 16px;
    }

    .campaign-row-content {
        grid-template-columns: 1fr;
    }

    .card-actions {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--secondary-color);
}

.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
}

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

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

.status-active {
    background: rgba(52, 168, 83, 0.1);
    color: var(--success-color);
}

.status-paused {
    background: rgba(251, 188, 4, 0.1);
    color: #b06000;
}

.status-deleted {
    background: rgba(234, 67, 53, 0.1);
    color: var(--danger-color);
}