/* ==========================================================================
   CSS Variables & Theme Setup
   Minimalist, professional CA-firm aesthetic
   ========================================================================== */
:root {
    /* Color Palette */
    --primary-color: #0f172a;       /* Slate 900 - Trust/Authority */
    --primary-hover: #1e293b;       /* Slate 800 */
    --accent-color: #2563eb;        /* Blue 600 - Action */
    --accent-hover: #1d4ed8;        /* Blue 700 */
    
    --bg-color: #f8fafc;            /* Slate 50 - Very light gray */
    --surface-color: #ffffff;       /* Pure white */
    
    --text-primary: #0f172a;        /* Slate 900 */
    --text-secondary: #475569;      /* Slate 600 */
    --text-tertiary: #94a3b8;       /* Slate 400 */
    
    --border-color: #e2e8f0;        /* Slate 200 */
    --border-light: #f1f5f9;        /* Slate 100 */
    
    /* Status Colors */
    --success-bg: #dcfce7;          /* Green 100 */
    --success-text: #166534;        /* Green 800 */
    --warning-bg: #fef9c3;          /* Yellow 100 */
    --warning-text: #854d0e;        /* Yellow 800 */
    --info-bg: #dbeafe;             /* Blue 100 */
    --info-text: #1e40af;           /* Blue 800 */
    
    /* Shadows - Soft and modern */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.05), 0 2px 4px -2px rgb(0 0 0 / 0.05);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.05), 0 4px 6px -4px rgb(0 0 0 / 0.025);
    
    /* Typography & Spacing */
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    --transition-fast: 0.15s ease-in-out;
    --transition-normal: 0.25s ease-in-out;
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

.container {
    width: 100%;
    max-width: 840px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ==========================================================================
   Header
   ========================================================================== */
.app-header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 24px 0;
    margin-bottom: 40px;
    box-shadow: var(--shadow-sm);
}

.header-container {
    display: flex;
    align-items: center;
}

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

.header-icon {
    color: var(--accent-color);
}

.app-header h1 {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
    letter-spacing: -0.01em;
}

.app-header .subtitle {
    font-size: 13px;
    color: var(--text-secondary);
    font-weight: 500;
    margin-top: 2px;
}

/* ==========================================================================
   Controls Section (Search & Filter)
   ========================================================================== */
.controls-section {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
    flex-wrap: wrap;
}

.search-box {
    flex: 2;
    min-width: 280px;
    position: relative;
}

.search-icon {
    position: absolute;
    left: 16px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-tertiary);
    pointer-events: none;
}

.search-box input {
    width: 100%;
    padding: 14px 16px 14px 44px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-primary);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.search-box input::placeholder {
    color: var(--text-tertiary);
}

.search-box input:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.filter-box {
    flex: 1;
    min-width: 220px;
}

.filter-box select {
    width: 100%;
    padding: 14px 40px 14px 16px;
    font-family: inherit;
    font-size: 15px;
    color: var(--text-primary);
    background-color: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748b' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.filter-box select:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

/* ==========================================================================
   Content Section & States
   ========================================================================== */
.content-section {
    margin-bottom: 60px;
}

.hidden {
    display: none !important;
}

/* Empty States */
.empty-state {
    background-color: var(--surface-color);
    border: 1px dashed var(--border-color);
    border-radius: var(--radius-lg);
    padding: 64px 24px;
    text-align: center;
    animation: fadeIn var(--transition-normal);
}

.empty-icon-wrapper {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    background-color: var(--bg-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-tertiary);
}

.empty-state h2 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state p {
    font-size: 14px;
    color: var(--text-secondary);
    max-width: 400px;
    margin: 0 auto;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Result Card
   ========================================================================== */
.result-card {
    background-color: var(--surface-color);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden;
    animation: fadeIn var(--transition-normal);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--border-light);
    background-color: #fcfcfd;
}

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

.form-badge {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.form-badge .label {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
}

.form-badge.old .label { color: var(--text-secondary); }
.form-badge.new .label { color: var(--accent-color); }

.form-badge strong {
    font-size: 20px;
    font-weight: 700;
    color: var(--primary-color);
}

.mapping-arrow {
    color: var(--text-tertiary);
    background-color: var(--border-light);
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 8px;
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 13px;
    font-weight: 600;
}

.status-badge.verified {
    background-color: var(--success-bg);
    color: var(--success-text);
}

.status-badge.unverified {
    background-color: var(--warning-bg);
    color: var(--warning-text);
}

.header-badges {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 8px;
}

.category-pill {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--bg-color);
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-size: 11px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.card-body {
    padding: 24px;
}

.data-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

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

.data-group.full-width {
    grid-column: span 2;
}

.data-label {
    font-size: 12px;
    color: var(--text-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.02em;
}

.data-value {
    font-size: 15px;
    color: var(--text-primary);
    font-weight: 500;
}

.type-pill {
    display: inline-block;
    padding: 4px 10px;
    background-color: var(--info-bg);
    color: var(--info-text);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 600;
}

.date-value {
    color: var(--text-secondary);
}

/* Footer & Buttons */
.card-footer {
    padding: 20px 24px;
    background-color: var(--bg-color);
    border-top: 1px solid var(--border-light);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    border-radius: var(--radius-md);
    text-decoration: none;
    transition: all var(--transition-fast);
    cursor: pointer;
}

.btn-primary {
    background-color: var(--accent-color);
    color: #ffffff;
    border: 1px solid var(--accent-color);
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    border-color: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    background-color: var(--bg-color);
    border-color: #cbd5e1;
}

/* ==========================================================================
   App Footer
   ========================================================================== */
.app-footer {
    margin-top: auto;
    padding: 24px 0;
    text-align: center;
    color: var(--text-tertiary);
    font-size: 13px;
}

/* ==========================================================================
   Responsive Adjustments
   ========================================================================== */
@media (max-width: 640px) {
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .header-badges {
        align-items: flex-start;
        flex-direction: row-reverse;
        width: 100%;
        justify-content: space-between;
    }
    
    .data-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .data-group.full-width {
        grid-column: span 1;
    }
    
    .card-footer {
        flex-direction: column-reverse;
    }
    
    .btn {
        width: 100%;
    }
}