/* CSS Variables */
:root {
    /* Colors */
    --primary-color: #0ea5e9;
    --primary-hover: #0284c7;
    --primary-light: #e0f2fe;
    --success-color: #10b981;
    --success-hover: #059669;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --bg-color: #f8fafc;
    --bg-dark: #0f172a;
    --surface-color: #ffffff;
    --border-color: #e2e8f0;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;

    /* Mask Colors */
    --mask-regional: #8b5cf6;
    --mask-category: #f59e0b;
    --mask-smart: #10b981;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

    /* Border Radius */
    --radius-sm: 6px;
    --radius-default: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

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

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-default);
    cursor: pointer;
    transition: all 0.2s ease;
}

.btn svg {
    width: 18px;
    height: 18px;
}

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

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

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

.btn-secondary:hover {
    background: var(--border-color);
}

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

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

.btn-ghost {
    background: transparent;
    color: var(--text-secondary);
}

.btn-ghost:hover {
    background: var(--bg-color);
    color: var(--text-primary);
}

.btn-sm {
    padding: 6px 12px;
    font-size: 13px;
}

.btn-sm svg {
    width: 16px;
    height: 16px;
}

.btn-block {
    width: 100%;
}

/* Login Screen */
.login-screen {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #0ea5e9 0%, #0284c7 50%, #0369a1 100%);
    padding: 20px;
}

.login-container {
    background: var(--surface-color);
    border-radius: var(--radius-xl);
    padding: 40px;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow-lg);
}

.login-header {
    text-align: center;
    margin-bottom: 32px;
}

.login-icon {
    width: 64px;
    height: 64px;
    margin: 0 auto 16px;
    background: var(--primary-light);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.login-icon svg {
    width: 32px;
    height: 32px;
    color: var(--primary-color);
}

.login-header h1 {
    font-size: 24px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

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

.login-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

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

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 12px 14px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-default);
    background: var(--surface-color);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

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

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.error-message {
    background: #fef2f2;
    border: 1px solid #fecaca;
    color: var(--error-color);
    padding: 12px;
    border-radius: var(--radius-default);
    font-size: 14px;
    text-align: center;
}

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

/* Header */
.header {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 24px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.logo svg {
    width: 28px;
    height: 28px;
    color: var(--primary-color);
}

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

.user-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 12px;
    background: var(--bg-color);
    border-radius: var(--radius-default);
    font-size: 14px;
    color: var(--text-secondary);
}

.user-badge svg {
    width: 18px;
    height: 18px;
}

/* Main Content Layout */
.main-content {
    display: flex;
    flex: 1;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--surface-color);
    border-right: 1px solid var(--border-color);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    overflow-y: auto;
    position: sticky;
    top: 57px;
    height: calc(100vh - 57px);
}

.sidebar-section {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.sidebar-title {
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

/* Mask Navigation */
.mask-nav {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mask-nav-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    border-radius: var(--radius-default);
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.mask-nav-item:hover {
    background: var(--bg-color);
}

.mask-nav-item.active {
    background: var(--primary-light);
    border-color: var(--primary-color);
}

.mask-nav-item .mask-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--radius-default);
    display: flex;
    align-items: center;
    justify-content: center;
}

.mask-nav-item .mask-icon svg {
    width: 20px;
    height: 20px;
    color: white;
}

.mask-nav-item[data-mask="regional"] .mask-icon {
    background: var(--mask-regional);
}

.mask-nav-item[data-mask="category"] .mask-icon {
    background: var(--mask-category);
}

.mask-nav-item[data-mask="smart"] .mask-icon {
    background: var(--mask-smart);
}

.mask-nav-item .mask-text {
    flex: 1;
}

.mask-nav-item .mask-name {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.mask-nav-item .mask-desc {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* Recent Searches */
.recent-searches {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.recent-search-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    background: var(--bg-color);
    border-radius: var(--radius-default);
    font-size: 13px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.recent-search-item:hover {
    background: var(--border-color);
}

.recent-search-item svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
}

.recent-search-item span {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.empty-text {
    font-size: 13px;
    color: var(--text-muted);
    font-style: italic;
}

/* Content Area */
.content {
    flex: 1;
    padding: 24px 32px;
    display: flex;
    flex-direction: column;
    gap: 24px;
    max-width: 1200px;
}

/* Mask Section */
.mask-section {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 24px;
}

.mask-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 24px;
    gap: 24px;
}

.mask-info h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.mask-info p {
    font-size: 14px;
    color: var(--text-secondary);
}

/* Example Queries */
.example-queries {
    flex-shrink: 0;
}

.example-label {
    font-size: 12px;
    color: var(--text-muted);
    display: block;
    margin-bottom: 8px;
}

.example-list {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.example-chip {
    padding: 4px 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 12px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all 0.2s ease;
}

.example-chip:hover {
    background: var(--primary-light);
    border-color: var(--primary-color);
    color: var(--primary-color);
}

/* Mask Form */
.mask-form {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.form-fields {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 20px;
}

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

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

.form-field label {
    font-size: 14px;
    font-weight: 500;
    color: var(--text-primary);
}

.form-field .required {
    color: var(--error-color);
}

.form-field input,
.form-field select,
.form-field textarea {
    padding: 10px 14px;
    font-size: 14px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-default);
    background: var(--surface-color);
    color: var(--text-primary);
    transition: all 0.2s ease;
}

.form-field input:focus,
.form-field select:focus,
.form-field textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.form-field textarea {
    resize: vertical;
    min-height: 100px;
}

.form-field.checkbox-field {
    flex-direction: row;
    align-items: center;
    gap: 10px;
}

.form-field.checkbox-field input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.form-field.checkbox-field label {
    cursor: pointer;
    user-select: none;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 12px;
    padding-top: 8px;
    border-top: 1px solid var(--border-color);
}

/* Results Section */
.results-section {
    background: var(--surface-color);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 24px;
    flex: 1;
}

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

.results-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.results-info h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
}

.results-count {
    padding: 4px 12px;
    background: var(--bg-color);
    border-radius: 20px;
    font-size: 13px;
    color: var(--text-secondary);
}

.results-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Columns Dropdown */
.output-fields-toggle {
    position: relative;
}

.columns-dropdown {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 8px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-default);
    box-shadow: var(--shadow-lg);
    padding: 12px;
    min-width: 200px;
    z-index: 50;
}

.columns-dropdown label {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px;
    font-size: 13px;
    color: var(--text-primary);
    cursor: pointer;
    border-radius: var(--radius-sm);
}

.columns-dropdown label:hover {
    background: var(--bg-color);
}

.columns-dropdown input[type="checkbox"] {
    width: 16px;
    height: 16px;
}

/* State Containers */
.state-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 60px 20px;
    text-align: center;
}

.state-container svg {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.state-container h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.state-container p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 16px;
}

.state-error svg {
    color: var(--error-color);
}

/* Spinner */
.spinner {
    width: 48px;
    height: 48px;
    border: 4px solid var(--border-color);
    border-top-color: var(--primary-color);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 16px;
}

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

/* AI Progress */
.ai-progress {
    width: 100%;
    max-width: 300px;
    margin-top: 16px;
}

.ai-progress-bar {
    height: 8px;
    background: var(--bg-color);
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 8px;
}

.ai-progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--mask-smart), var(--primary-color));
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
}

#ai-progress-text {
    font-size: 13px;
    color: var(--text-secondary);
}

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

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

.results-table th {
    text-align: left;
    padding: 12px 16px;
    background: var(--bg-color);
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 2px solid var(--border-color);
    white-space: nowrap;
    position: sticky;
    top: 0;
}

.results-table td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
}

.results-table tbody tr:hover {
    background: var(--bg-color);
}

.results-table .cell-company {
    font-weight: 500;
}

.results-table .cell-email {
    color: var(--primary-color);
}

.results-table .cell-phone {
    font-family: 'Monaco', 'Menlo', monospace;
    font-size: 13px;
}

.results-table .cell-link {
    color: var(--primary-color);
    text-decoration: none;
}

.results-table .cell-link:hover {
    text-decoration: underline;
}

.results-table .cell-score {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.score-badge {
    padding: 2px 8px;
    border-radius: 12px;
    font-size: 12px;
    font-weight: 500;
}

.score-high {
    background: #dcfce7;
    color: #166534;
}

.score-medium {
    background: #fef9c3;
    color: #854d0e;
}

.score-low {
    background: #fee2e2;
    color: #991b1b;
}

.cell-reasoning {
    max-width: 300px;
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.cell-reasoning:hover {
    white-space: normal;
    overflow: visible;
}

/* Responsive */
@media (max-width: 1024px) {
    .sidebar {
        width: 240px;
    }

    .content {
        padding: 20px;
    }
}

@media (max-width: 768px) {
    .main-content {
        flex-direction: column;
    }

    .sidebar {
        width: 100%;
        height: auto;
        position: relative;
        top: 0;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }

    .mask-nav {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .mask-nav-item {
        flex: 1;
        min-width: 150px;
    }

    .form-fields {
        grid-template-columns: 1fr;
    }

    .mask-header {
        flex-direction: column;
    }

    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 16px;
    }

    .results-actions {
        width: 100%;
        justify-content: space-between;
    }

    .header {
        padding: 12px 16px;
    }

    .logo span {
        display: none;
    }
}