/**
 * Keyword Agent - Public Styles
 * Responsive design for desktop, tablet, and mobile PWA
 */

/* CSS Variables */
:root {
    --ka-primary: #2563eb;
    --ka-primary-hover: #1d4ed8;
    --ka-secondary: #64748b;
    --ka-success: #22c55e;
    --ka-warning: #f59e0b;
    --ka-danger: #ef4444;
    --ka-info: #3b82f6;
    --ka-light: #f8fafc;
    --ka-dark: #1e293b;
    --ka-border: #e2e8f0;
    --ka-text: #334155;
    --ka-text-muted: #94a3b8;
    --ka-radius: 8px;
    --ka-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --ka-shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.1);
}

/* Container */
.ka-search-container,
.ka-saved-lists-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

/* Banner */
.ka-banner {
    padding: 12px 16px;
    border-radius: var(--ka-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.ka-banner-warning {
    background: #fef3c7;
    border: 1px solid #f59e0b;
    color: #92400e;
}

/* Mode Toggle */
.ka-mode-toggle {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.ka-toggle-label {
    cursor: pointer;
}

.ka-toggle-label input {
    display: none;
}

.ka-toggle-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: 2px solid var(--ka-border);
    border-radius: var(--ka-radius);
    background: var(--ka-light);
    color: var(--ka-text);
    transition: all 0.2s ease;
}

.ka-toggle-label input:checked + .ka-toggle-btn {
    background: var(--ka-primary);
    border-color: var(--ka-primary);
    color: white;
}

.ka-toggle-btn:hover {
    border-color: var(--ka-primary);
}

/* Search Bar */
.ka-search-bar {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

.ka-search-input {
    flex: 1;
    padding: 14px 18px;
    font-size: 16px;
    border: 2px solid var(--ka-border);
    border-radius: var(--ka-radius);
    outline: none;
    transition: border-color 0.2s ease;
}

.ka-search-input:focus {
    border-color: var(--ka-primary);
}

.ka-search-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 24px;
    background: var(--ka-primary);
    color: white;
    border: none;
    border-radius: var(--ka-radius);
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s ease;
}

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

/* Filters Row */
.ka-filters-row {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 30px;
}

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

.ka-filter-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--ka-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ka-select {
    padding: 10px 14px;
    font-size: 14px;
    border: 2px solid var(--ka-border);
    border-radius: var(--ka-radius);
    background: white;
    min-width: 180px;
    cursor: pointer;
}

.ka-select:focus {
    outline: none;
    border-color: var(--ka-primary);
}

/* Checkbox */
.ka-checkbox-group {
    flex-direction: row;
    align-items: center;
}

.ka-checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
}

.ka-checkbox-label input {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

.ka-checkbox-text {
    display: flex;
    align-items: center;
    gap: 6px;
    font-weight: 500;
}

.ka-tooltip {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    background: var(--ka-secondary);
    color: white;
    border-radius: 50%;
    font-size: 11px;
    cursor: help;
}

/* Loading State */
.ka-loading {
    text-align: center;
    padding: 60px 20px;
}

.ka-spinner {
    width: 50px;
    height: 50px;
    border: 4px solid var(--ka-border);
    border-top-color: var(--ka-primary);
    border-radius: 50%;
    animation: ka-spin 1s linear infinite;
    margin: 0 auto 20px;
}

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

.ka-loading-text {
    color: var(--ka-text-muted);
    font-size: 16px;
}

/* Results Container */
.ka-results-container {
    margin-top: 30px;
}

/* Summary Card */
.ka-card {
    background: white;
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius);
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: var(--ka-shadow);
}

.ka-summary-card h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin: 0 0 15px;
    color: var(--ka-dark);
}

.ka-summary-content {
    color: var(--ka-text);
    line-height: 1.6;
}

/* Results Header */
.ka-results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    margin-bottom: 20px;
}

.ka-results-info {
    display: flex;
    align-items: center;
    gap: 15px;
}

.ka-cache-indicator {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 10px;
    background: #dbeafe;
    color: #1e40af;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 500;
}

.ka-results-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

/* Buttons */
.ka-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    font-size: 14px;
    font-weight: 500;
    border: none;
    border-radius: var(--ka-radius);
    cursor: pointer;
    transition: all 0.2s ease;
}

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

.ka-btn-primary:hover:not(:disabled) {
    background: var(--ka-primary-hover);
}

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

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

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

.ka-btn-danger:hover {
    background: #dc2626;
}

.ka-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.ka-btn-icon {
    padding: 8px;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--ka-text-muted);
    border-radius: var(--ka-radius);
}

.ka-btn-icon:hover {
    background: var(--ka-light);
    color: var(--ka-text);
}

/* Results Table */
.ka-table-wrapper {
    overflow-x: auto;
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius);
}

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

.ka-results-table th,
.ka-results-table td {
    padding: 12px 16px;
    text-align: left;
    border-bottom: 1px solid var(--ka-border);
}

.ka-results-table th {
    background: var(--ka-light);
    font-weight: 600;
    color: var(--ka-text-muted);
    text-transform: uppercase;
    font-size: 12px;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.ka-results-table tbody tr:hover {
    background: #f8fafc;
}

.ka-results-table tbody tr:last-child td {
    border-bottom: none;
}

/* Sortable Headers */
.ka-sortable {
    cursor: pointer;
    user-select: none;
}

.ka-sortable:hover {
    background: #e2e8f0;
}

.ka-sort-icon::after {
    content: '↕';
    margin-left: 4px;
    opacity: 0.3;
}

.ka-sortable.asc .ka-sort-icon::after {
    content: '↑';
    opacity: 1;
}

.ka-sortable.desc .ka-sort-icon::after {
    content: '↓';
    opacity: 1;
}

/* Column Widths */
.ka-col-checkbox { width: 40px; text-align: center; }
.ka-col-keyword { min-width: 200px; }
.ka-col-intent { width: 120px; }
.ka-col-volume { width: 100px; }
.ka-col-trend { width: 100px; }
.ka-col-difficulty { width: 80px; }
.ka-col-cpc { width: 80px; }

/* Intent Badges */
.ka-intent-badge {
    display: inline-block;
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
}

.ka-intent-informational { background: #dbeafe; color: #1e40af; }
.ka-intent-commercial { background: #fef3c7; color: #92400e; }
.ka-intent-transactional { background: #dcfce7; color: #166534; }
.ka-intent-navigational { background: #f3e8ff; color: #6b21a8; }

/* Difficulty Indicator */
.ka-difficulty {
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.ka-difficulty-bar {
    width: 50px;
    height: 6px;
    background: var(--ka-border);
    border-radius: 3px;
    overflow: hidden;
}

.ka-difficulty-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.3s ease;
}

.ka-difficulty-easy { background: var(--ka-success); }
.ka-difficulty-medium { background: var(--ka-warning); }
.ka-difficulty-hard { background: var(--ka-danger); }

/* Sparkline */
.ka-sparkline {
    width: 80px;
    height: 30px;
}

/* PAA Section */
.ka-paa-section {
    margin-top: 30px;
}

.ka-paa-section h3 {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 15px;
}

.ka-paa-list {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.ka-paa-item {
    background: var(--ka-light);
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius);
    padding: 15px;
}

.ka-paa-question {
    font-weight: 500;
    color: var(--ka-dark);
}

/* Modal */
.ka-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 20px;
}

.ka-modal-content {
    background: white;
    border-radius: var(--ka-radius);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow: auto;
    box-shadow: var(--ka-shadow-lg);
}

.ka-modal-large {
    max-width: 900px;
}

.ka-modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--ka-border);
}

.ka-modal-header h3 {
    margin: 0;
}

.ka-modal-close {
    background: none;
    border: none;
    font-size: 24px;
    cursor: pointer;
    color: var(--ka-text-muted);
    padding: 0;
    line-height: 1;
}

.ka-modal-close:hover {
    color: var(--ka-text);
}

.ka-modal-body {
    padding: 20px;
}

.ka-modal-footer {
    display: flex;
    justify-content: flex-end;
    gap: 10px;
    padding: 20px;
    border-top: 1px solid var(--ka-border);
}

/* Form Elements */
.ka-form-group {
    margin-bottom: 20px;
}

.ka-form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--ka-text);
}

.ka-input {
    width: 100%;
    padding: 12px 14px;
    font-size: 14px;
    border: 2px solid var(--ka-border);
    border-radius: var(--ka-radius);
    outline: none;
}

.ka-input:focus {
    border-color: var(--ka-primary);
}

.ka-divider {
    text-align: center;
    color: var(--ka-text-muted);
}

/* Projects Grid */
.ka-saved-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 30px;
}

.ka-saved-header h2 {
    display: flex;
    align-items: center;
    gap: 10px;
    margin: 0;
}

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

.ka-project-card {
    background: white;
    border: 1px solid var(--ka-border);
    border-radius: var(--ka-radius);
    padding: 20px;
    box-shadow: var(--ka-shadow);
    transition: box-shadow 0.2s ease;
}

.ka-project-card:hover {
    box-shadow: var(--ka-shadow-lg);
}

.ka-project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 15px;
}

.ka-project-name {
    margin: 0;
    font-size: 18px;
    color: var(--ka-dark);
}

.ka-project-actions {
    display: flex;
    gap: 5px;
}

.ka-project-stats {
    display: flex;
    gap: 20px;
}

.ka-stat {
    display: flex;
    flex-direction: column;
}

.ka-stat-value {
    font-size: 20px;
    font-weight: 600;
    color: var(--ka-primary);
}

.ka-stat-label {
    font-size: 12px;
    color: var(--ka-text-muted);
    text-transform: uppercase;
}

/* Empty State */
.ka-empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 60px 20px;
    color: var(--ka-text-muted);
}

.ka-empty-state .dashicons {
    font-size: 48px;
    width: 48px;
    height: 48px;
    margin-bottom: 15px;
}

.ka-empty-state h3 {
    margin: 0 0 10px;
    color: var(--ka-text);
}

/* Login Required */
.ka-login-required {
    text-align: center;
    padding: 40px;
    background: var(--ka-light);
    border-radius: var(--ka-radius);
    color: var(--ka-text);
}

/* Responsive Design */
@media (max-width: 768px) {
    .ka-search-container,
    .ka-saved-lists-container {
        padding: 15px;
    }

    .ka-mode-toggle {
        flex-direction: column;
    }

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

    .ka-search-bar {
        flex-direction: column;
    }

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

    .ka-filters-row {
        flex-direction: column;
    }

    .ka-filter-group {
        width: 100%;
    }

    .ka-select {
        width: 100%;
    }

    .ka-results-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .ka-results-actions {
        width: 100%;
    }

    .ka-btn {
        flex: 1;
        justify-content: center;
    }

    .ka-saved-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }

    .ka-saved-header .ka-btn {
        width: 100%;
    }

    .ka-projects-grid {
        grid-template-columns: 1fr;
    }

    .ka-modal-content {
        margin: 10px;
        max-height: calc(100vh - 20px);
    }

    .ka-modal-footer {
        flex-direction: column;
    }

    .ka-modal-footer .ka-btn {
        width: 100%;
    }

    /* Hide text on mobile, show only icons */
    .ka-btn-text {
        display: none;
    }
}

@media (max-width: 480px) {
    .ka-results-table th,
    .ka-results-table td {
        padding: 10px 8px;
        font-size: 13px;
    }

    .ka-col-trend,
    .ka-col-cpc {
        display: none;
    }
}

/* Dark Mode Support */
@media (prefers-color-scheme: dark) {
    :root {
        --ka-light: #1e293b;
        --ka-dark: #f8fafc;
        --ka-border: #334155;
        --ka-text: #e2e8f0;
        --ka-text-muted: #94a3b8;
    }

    .ka-card,
    .ka-project-card,
    .ka-modal-content,
    .ka-results-table th {
        background: #0f172a;
    }

    .ka-search-input,
    .ka-select,
    .ka-input {
        background: #1e293b;
        color: var(--ka-text);
    }

    .ka-results-table tbody tr:hover {
        background: #1e293b;
    }
}