/* ===== CSS VARIABLES FOR THEMING ===== */
:root {
    /* Light Theme Colors */
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --secondary-color: #64748b;
    --accent-color: #10b981;
    --warning-color: #f59e0b;
    --error-color: #ef4444;
    --success-color: #10b981;
    
    /* Background Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;
    --bg-card: #ffffff;
    
    /* Text Colors */
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --text-muted: #94a3b8;
    
    /* Border Colors */
    --border-color: #e2e8f0;
    --border-hover: #cbd5e1;
    
    /* Shadow */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
}

/* Dark Theme */
@media (prefers-color-scheme: dark) {
    :root {
        --bg-primary: #0f172a;
        --bg-secondary: #1e293b;
        --bg-tertiary: #334155;
        --bg-card: #1e293b;
        
        --text-primary: #f1f5f9;
        --text-secondary: #cbd5e1;
        --text-muted: #94a3b8;
        
        --border-color: #334155;
        --border-hover: #475569;
        
        --primary-light: rgba(37, 99, 235, 0.1);
    }
}

/* Manual Dark Theme Toggle */
[data-theme="dark"] {
    --bg-primary: #0f172a;
    --bg-secondary: #1e293b;
    --bg-tertiary: #334155;
    --bg-card: #1e293b;
    
    --text-primary: #f1f5f9;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    
    --border-color: #334155;
    --border-hover: #475569;
    
    --primary-light: rgba(37, 99, 235, 0.1);
}

/* ===== BASE STYLES ===== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    min-height: 100vh;
    font-size: 14px;
    transition: background-color var(--transition-normal), color var(--transition-normal);
}

/* ===== HEADER STYLES ===== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
    color: white;
    text-align: center;
    padding: 2rem 1rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 20"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="rgba(255,255,255,0.1)" stroke-width="1"/></pattern></defs><rect width="100" height="20" fill="url(%23grid)"/></svg>');
    opacity: 0.1;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 1;
}

.header p {
    font-size: 1.125rem;
    opacity: 0.9;
    position: relative;
    z-index: 1;
}

/* ===== CONTAINER STYLES ===== */
.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    position: relative;
}

/* ===== THEME TOGGLE ===== */
.theme-toggle {
    position: fixed;
    top: 2rem;
    right: 2rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 3rem;
    height: 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-normal);
    z-index: 1000;
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-xl);
}

/* ===== SEARCH FORM STYLES ===== */
.search-form {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    padding: 2rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
    transition: all var(--transition-normal);
}

.search-form:hover {
    box-shadow: var(--shadow-xl);
}

/* ===== TAB STYLES ===== */
.search-type-tabs {
    display: flex;
    margin-bottom: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: 0.25rem;
    gap: 0.25rem;
}

.tab {
    flex: 1;
    padding: 0.75rem 1.5rem;
    text-align: center;
    background: transparent;
    border: none;
    border-radius: var(--radius-md);
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
    font-size: 0.875rem;
}

.tab:hover {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.tab.active {
    background: var(--primary-color);
    color: white;
    box-shadow: var(--shadow-sm);
}

/* ===== SEARCH OPTIONS ===== */
.search-option {
    display: none;
    animation: fadeIn 0.3s ease-in-out;
}

.search-option.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ===== FORM STYLES ===== */
.form-row {
    display: flex;
    align-items: center;
    margin-bottom: 1.5rem;
    gap: 1rem;
}

.form-row.checkbox {
    align-items: flex-start;
    gap: 0.75rem;
}

.form-row label {
    font-weight: 600;
    color: var(--text-primary);
    min-width: 120px;
    font-size: 0.875rem;
}

.form-row input,
.form-row select {
    flex: 1;
    max-width: 300px;
    padding: 0.75rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.875rem;
    transition: all var(--transition-normal);
}

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

.form-row input:hover,
.form-row select:hover {
    border-color: var(--border-hover);
}

/* ===== CHECKBOX STYLES ===== */
input[type="checkbox"] {
    width: 1.25rem;
    height: 1.25rem;
    accent-color: var(--primary-color);
    margin: 0;
    cursor: pointer;
}

.checkbox label {
    cursor: pointer;
    min-width: auto;
    flex: 1;
}

/* ===== BUTTON STYLES ===== */
button {
    padding: 0.75rem 2rem;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 0.875rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-right: 1rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

button:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    background: var(--secondary-color);
    cursor: not-allowed;
    transform: none;
    opacity: 0.6;
}

button[type="button"] {
    background: var(--secondary-color);
}

button[type="button"]:hover {
    background: var(--text-secondary);
}

/* ===== HELP TEXT ===== */
.help-text {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    margin-top: 0.5rem;
    margin-left: 136px;
}

/* ===== AUTOCOMPLETE STYLES ===== */
.autocomplete-container {
    position: relative;
    flex: 1;
    max-width: 300px;
}

.autocomplete-suggestions {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--bg-card);
    border: 2px solid var(--primary-color);
    border-top: none;
    border-radius: 0 0 var(--radius-md) var(--radius-md);
    max-height: 200px;
    overflow-y: auto;
    z-index: 1000;
    display: none;
    box-shadow: var(--shadow-lg);
}

.autocomplete-suggestion {
    padding: 0.75rem 1rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    transition: all var(--transition-fast);
}

.autocomplete-suggestion:hover,
.autocomplete-suggestion.active {
    background: var(--primary-light);
    color: var(--primary-color);
}

.autocomplete-suggestion:last-child {
    border-bottom: none;
}

/* ===== RESULTS INFO ===== */
.results-info {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
}

.results-count {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.results-count strong {
    color: var(--primary-color);
}

.results-count small {
    font-weight: 400;
    color: var(--text-secondary);
}

/* ===== EXPORT BUTTONS ===== */
.export-buttons {
    background: var(--bg-tertiary);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    border: 1px solid var(--border-color);
}

.export-buttons button {
    background: var(--success-color);
    font-size: 0.8125rem;
    padding: 0.625rem 1.25rem;
}

.export-buttons button:hover {
    background: #059669;
}

/* ===== STATS PANEL ===== */
.stats-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-box {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    text-align: center;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-normal);
}

.stat-box:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 500;
}

/* ===== CHART CONTAINER ===== */
.chart-container {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.chart-container h3 {
    color: var(--text-primary);
    margin-bottom: 1.5rem;
    font-size: 1.25rem;
    font-weight: 600;
}

.chart-wrapper {
    position: relative;
    height: 400px;
    margin: 1.5rem 0;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: 1rem;
}

.trend-controls {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
    padding: 1rem;
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    margin-top: 1rem;
}

.trend-controls label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.8125rem;
    color: var(--text-secondary);
    cursor: pointer;
    font-weight: 500;
}

/* ===== TABLE STYLES ===== */
.table-scroll {
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

table {
    width: 100%;
    border-collapse: collapse;
}

thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-hover) 100%);
}

th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    font-size: 0.875rem;
    color: white;
    position: sticky;
    top: 0;
    z-index: 10;
}

.timestamp-header {
    background: linear-gradient(135deg, var(--accent-color) 0%, #059669 100%);
    min-width: 160px;
}

td {
    padding: 0.875rem 1rem;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-primary);
    font-size: 0.8125rem;
}

tbody tr {
    transition: all var(--transition-fast);
}

tbody tr:hover {
    background: var(--bg-secondary);
}

tbody tr:nth-child(even) {
    background: var(--bg-tertiary);
}

tbody tr:nth-child(even):hover {
    background: var(--bg-secondary);
}

.timestamp {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 600;
    color: var(--accent-color);
}

.numeric-value {
    text-align: right;
    font-family: 'JetBrains Mono', monospace;
    font-weight: 500;
}

/* ===== LOADING OVERLAY ===== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(4px);
    display: none;
    justify-content: center;
    align-items: center;
    z-index: 9999;
}

.loading-container {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    text-align: center;
    min-width: 320px;
    border: 1px solid var(--border-color);
}

.loading-spinner {
    border: 4px solid var(--border-color);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem auto;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.loading-subtext {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.progress-bar {
    width: 100%;
    height: 6px;
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--accent-color));
    width: 0%;
    border-radius: var(--radius-sm);
    transition: width 0.3s ease;
    animation: progressPulse 2s ease-in-out infinite;
}

@keyframes progressPulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

/* ===== STATUS INDICATOR ===== */
.search-status {
    background: var(--primary-light);
    border: 1px solid var(--primary-color);
    color: var(--primary-color);
    padding: 1rem;
    border-radius: var(--radius-md);
    margin: 1rem 0;
    display: none;
}

.status-content {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
}

.mini-spinner {
    border: 2px solid var(--primary-light);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    width: 16px;
    height: 16px;
    animation: spin 1s linear infinite;
}

.status-text {
    font-weight: 600;
    font-size: 0.875rem;
}

/* ===== NO RESULTS ===== */
.no-results {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--bg-card);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.no-results h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 0.5rem;
    }
    
    .header {
        padding: 1.5rem 1rem;
    }
    
    .header h1 {
        font-size: 2rem;
    }
    
    .search-form {
        padding: 1.5rem;
    }
    
    .form-row {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .form-row label {
        min-width: auto;
    }
    
    .form-row input,
    .form-row select,
    .autocomplete-container {
        max-width: 100%;
    }
    
    .help-text {
        margin-left: 0;
    }
    
    .search-type-tabs {
        flex-direction: column;
    }
    
    .stats-panel {
        grid-template-columns: 1fr;
    }
    
    .trend-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .export-buttons {
        flex-direction: column;
    }
    
    .theme-toggle {
        top: 1rem;
        right: 1rem;
        width: 2.5rem;
        height: 2.5rem;
    }
}

/* ===== SCROLLBAR STYLES ===== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
}

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

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

/* ===== ANIMATIONS ===== */
@keyframes slideInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.search-form,
.results-info,
.chart-container,
.table-scroll {
    animation: slideInUp 0.5s ease-out;
}

/* ===== FOCUS STYLES FOR ACCESSIBILITY ===== */
button:focus-visible,
input:focus-visible,
select:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}

/* ===== UTILITY CLASSES ===== */
.text-center { text-align: center; }
.text-right { text-align: right; }
.font-bold { font-weight: 700; }
.font-semibold { font-weight: 600; }
.text-sm { font-size: 0.875rem; }
.text-xs { font-size: 0.75rem; }
.mt-4 { margin-top: 1rem; }
.mb-4 { margin-bottom: 1rem; }
.p-4 { padding: 1rem; }