/* Tools Page Styles - Modern & Clean */

/* ===== TOOL PAGE CONTAINER ===== */
.tool-page {
    max-width: 800px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* ===== LINK STYLING (Dark Mode Compatible) ===== */
.tool-page a:not(.tool-btn):not(.related-tool-card):not(.nav-link) {
    color: var(--color-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

.tool-page a:not(.tool-btn):not(.related-tool-card):not(.nav-link):hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.tool-page a:not(.tool-btn):not(.related-tool-card):not(.nav-link):visited {
    color: var(--accent-color);
}

/* Ensure links in result cards, data tables, and info sections are visible */
.result-card a,
.data-table a,
.info-section a,
.learn-section a,
.kv-value a {
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 500;
}

.result-card a:hover,
.data-table a:hover,
.info-section a:hover,
.learn-section a:hover,
.kv-value a:hover {
    color: var(--accent-color);
    text-decoration: underline;
}

.tool-page-wide {
    max-width: 1000px;
}

/* ===== TOOL HEADER ===== */
.tool-header {
    text-align: center;
    margin-bottom: 2.5rem;
}

.tool-header h1 {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.75rem 0;
    line-height: 1.2;
}

.tool-header .tool-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin: 0;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* ===== SEARCH/INPUT FORM ===== */
.tool-form {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 2rem;
}

.tool-form-row {
    display: flex;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.tool-input {
    flex: 1;
    min-width: 200px;
    padding: 0.875rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color 0.2s, box-shadow 0.2s;
}

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

.tool-input::placeholder {
    color: var(--color-text-muted);
}

.tool-btn {
    padding: 0.875rem 1.5rem;
    font-size: 1rem;
    font-weight: 600;
    color: white;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--accent-color) 100%);
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    white-space: nowrap;
}

.tool-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.4);
}

.tool-btn:active {
    transform: translateY(0);
}

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

.tool-btn-secondary:hover {
    background: var(--color-bg-secondary);
    box-shadow: var(--shadow-md);
}

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

/* ===== DOWNLOAD ACTIONS ===== */
.download-actions {
    display: flex;
    justify-content: center;
    gap: 0.75rem;
    margin: 1.5rem 0;
    flex-wrap: wrap;
}

.tool-btn-sm {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
}

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

.tool-input-sm {
    padding: 0.625rem 0.75rem;
    font-size: 0.9375rem;
}

.bimi-logo-preview {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    display: grid;
    gap: 0.75rem;
    justify-items: center;
}

.bimi-logo-preview img {
    max-width: 128px;
    max-height: 128px;
}

/* ===== RESULT CARDS ===== */
.result-section {
    margin-top: 2rem;
}

.result-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
}

.result-card-header {
    background: var(--color-bg-secondary);
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.result-card-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin: 0;
}

.result-card-body {
    padding: 1.25rem;
}

/* Direct children padding for result-card */
.result-card > .data-table {
    margin: 0;
}

.result-card > .data-table th:first-child,
.result-card > .data-table td:first-child {
    padding-left: 1.5rem;
}

.result-card > .data-table th:last-child,
.result-card > .data-table td:last-child {
    padding-right: 1.5rem;
}

/* ===== STATUS BADGES ===== */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    border-radius: 9999px;
}

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

.status-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.status-error {
    background: var(--color-error-light);
    color: var(--color-error);
}

.status-info {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ===== CODE/RECORD DISPLAY ===== */
.code-block {
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    line-height: 1.5;
    overflow-x: auto;
    word-break: break-all;
    position: relative;
}

.code-block-with-copy {
    padding-right: 4rem;
}

.copy-btn {
    position: absolute;
    top: 0.75rem;
    right: 0.75rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.375rem 0.625rem;
    font-size: 0.75rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    color: var(--color-text-secondary);
    transition: all 0.2s;
}

.copy-btn svg {
    flex-shrink: 0;
}

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

.copy-btn:hover svg {
    stroke: white;
}

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

.copy-btn.copied svg {
    stroke: white;
}

/* ===== DATA TABLE ===== */
.data-table {
    width: 100%;
    border-collapse: collapse;
}

.data-table th,
.data-table td {
    padding: 0.875rem 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-border);
}

.data-table th {
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--color-bg-secondary);
}

.data-table td {
    color: var(--color-text);
}

.data-table tr:last-child td {
    border-bottom: none;
}

.data-table tr:hover td {
    background: var(--color-bg-secondary);
}

.data-table-compact th,
.data-table-compact td {
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
}

/* Propagation table specific */
.propagation-table-wrapper {
    overflow-x: auto;
}

.propagation-table .row-warning {
    background: var(--color-warning-light);
}

.propagation-table .location-flag {
    margin-right: 0.5rem;
}

.propagation-table .location-name {
    font-weight: 500;
}

.propagation-table .dns-value {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    word-break: break-all;
    max-width: 300px;
    display: inline-block;
}

.response-time {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
}

/* Key-value table style */
.kv-table {
    width: 100%;
}

.kv-table tr {
    border-bottom: 1px solid var(--color-border-light);
}

.kv-table tr:last-child {
    border-bottom: none;
}

.kv-table th {
    width: 160px;
    padding: 0.75rem 0;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: left;
    vertical-align: top;
}

.kv-table td {
    padding: 0.75rem 0;
    color: var(--color-text);
}

/* ===== CHECK LIST ===== */
.check-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.check-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 0;
    border-bottom: 1px solid var(--color-border-light, var(--color-border));
}

.check-item:first-child {
    padding-top: 0;
}

.check-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.check-icon {
    flex-shrink: 0;
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-size: 1rem;
    background: var(--color-bg-secondary);
}

.check-icon-pass {
    background: var(--color-success-light);
    color: var(--color-success);
}

.check-icon-warning {
    background: var(--color-warning-light);
    color: var(--color-warning);
}

.check-icon-fail {
    background: var(--color-error-light);
    color: var(--color-error);
}

.check-content {
    flex: 1;
    min-width: 0;
}

.check-title {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.check-description {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin: 0;
    line-height: 1.5;
}

/* ===== INFO BOX ===== */
.info-box {
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin: 1rem 0;
    display: flex;
    gap: 0.75rem;
    align-items: flex-start;
}

.info-box-icon {
    flex-shrink: 0;
    font-size: 1.25rem;
}

.info-box-content {
    flex: 1;
}

.info-box-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.info-box-text {
    font-size: 0.9375rem;
}

.info-box-tip {
    background: var(--color-primary-light);
    border: 1px solid rgba(59, 130, 246, 0.2);
    color: var(--color-text);
}

.info-box-warning {
    background: var(--color-warning-light);
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.info-box-error {
    background: var(--color-error-light);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.info-box-info {
    background: var(--color-primary-light);
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.info-box-success {
    background: var(--color-success-light);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* ===== FORM ELEMENTS ===== */
.form-group {
    margin-bottom: 1.25rem;
}

.form-label {
    display: block;
    font-weight: 500;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.form-hint {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
    margin-top: 0.375rem;
}

.form-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
}

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

/* Checkbox and Radio Groups */
.checkbox-group,
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.checkbox-item,
.radio-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.checkbox-item:hover,
.radio-item:hover {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.checkbox-item input,
.radio-item input {
    accent-color: var(--color-primary);
    width: 1.125rem;
    height: 1.125rem;
}

.checkbox-item.selected,
.radio-item.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

/* Provider checkboxes with icons */
.provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 0.75rem;
}

.provider-item {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.provider-item:hover {
    border-color: var(--color-primary);
}

.provider-item input[type="checkbox"] {
    accent-color: var(--color-primary);
    width: 1rem;
    height: 1rem;
}

.provider-item img {
    width: 1.25rem;
    height: 1.25rem;
    object-fit: contain;
}

.provider-icon {
    font-size: 1.25rem;
    line-height: 1;
}

.provider-item span {
    font-size: 0.9375rem;
    color: var(--color-text);
}

.provider-item.selected {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
}

/* ===== POLICY SELECTOR ===== */
.policy-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 0.75rem;
}

.policy-card {
    position: relative;
    padding: 1rem;
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.policy-card:hover {
    border-color: var(--color-primary);
}

.policy-card input {
    position: absolute;
    opacity: 0;
}

.policy-card.selected {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.policy-card-value {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-primary);
    margin-bottom: 0.25rem;
}

.policy-card-label {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===== TAGS ===== */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    background: var(--color-bg-tertiary);
    border-radius: 9999px;
    color: var(--color-text-secondary);
}

.tag-primary {
    background: var(--color-primary-light);
    color: var(--color-primary);
}

/* ===== CHAIN/TREE DISPLAY ===== */
.chain-tree {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.75;
}

.chain-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
}

.chain-indent {
    display: inline-block;
    width: 1.5rem;
    text-align: center;
    color: var(--color-text-muted);
}

.chain-connector {
    color: var(--color-text-muted);
}

/* ===== HERO STATS ===== */
.result-hero {
    text-align: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--color-bg-secondary) 0%, var(--color-bg-tertiary) 100%);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.result-hero-status {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

.result-hero-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.5rem 0;
}

.result-hero-subtitle {
    font-size: 1rem;
    color: var(--color-text-secondary);
}

/* ===== TABS ===== */
.tabs {
    display: flex;
    gap: 0.25rem;
    background: var(--color-bg-secondary);
    padding: 0.25rem;
    border-radius: var(--radius);
    margin-bottom: 1.5rem;
}

.tab {
    flex: 1;
    padding: 0.75rem 1rem;
    font-size: 0.9375rem;
    font-weight: 500;
    text-align: center;
    background: transparent;
    border: none;
    border-radius: calc(var(--radius) - 2px);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--color-text);
}

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

/* ===== EMPTY STATE ===== */
.empty-state {
    text-align: center;
    padding: 3rem 1.5rem;
    color: var(--color-text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.5;
}

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

.empty-state-text {
    font-size: 0.9375rem;
}

/* ===== LOADING STATE ===== */
.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 2rem;
    color: var(--color-text-secondary);
}

.loading-spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* ===== BUTTON LOADING STATE ===== */
.tool-btn.is-loading {
    pointer-events: none;
    opacity: 0.85;
}

.tool-btn .btn-spinner {
    display: none;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.tool-btn.is-loading .btn-spinner {
    display: inline-block;
}

.tool-btn.is-loading .btn-icon {
    display: none;
}

/* ===== LEARN SECTION ===== */
.learn-section {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
}

.learn-section h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.learn-section p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
}

.learn-section ul {
    padding-left: 1.5rem;
    color: var(--color-text-secondary);
}

.learn-section li {
    margin-bottom: 0.5rem;
}

.learn-section code {
    background: var(--color-bg-tertiary);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.875em;
}

/* ===== PRO UPSELL ===== */
.pro-banner {
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--color-primary) 100%);
    color: white;
    padding: 1.25rem 1.5rem;
    border-radius: var(--radius-lg);
    margin-top: 2rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.pro-banner-icon {
    font-size: 1.5rem;
}

.pro-banner-content {
    flex: 1;
    min-width: 200px;
}

.pro-banner-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.pro-banner-text {
    font-size: 0.9375rem;
    opacity: 0.9;
}

.pro-banner-btn {
    padding: 0.625rem 1.25rem;
    background: white;
    color: var(--accent-color);
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s;
}

.pro-banner-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 640px) {
    .tool-page {
        padding: 1.5rem 1rem;
    }
    
    .tool-header h1 {
        font-size: 1.75rem;
    }
    
    .tool-form-row {
        flex-direction: column;
    }
    
    .tool-btn {
        width: 100%;
        justify-content: center;
    }
    
    .provider-grid {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .provider-item {
        padding: 0.5rem 0.625rem;
        gap: 0.375rem;
        font-size: 0.8125rem;
    }
    
    .provider-item input[type="checkbox"] {
        width: 0.875rem;
        height: 0.875rem;
    }
    
    .provider-icon {
        font-size: 1rem;
    }
    
    .provider-item span {
        font-size: 0.8125rem;
    }
    
    .policy-cards {
        grid-template-columns: 1fr 1fr 1fr;
        gap: 0.5rem;
    }
    
    .policy-card {
        padding: 0.75rem 0.5rem;
    }
    
    .policy-card-value {
        font-size: 0.875rem;
    }
    
    .policy-card-label {
        font-size: 0.75rem;
    }
    
    .kv-table th {
        width: 100px;
        font-size: 0.8125rem;
        padding: 0.5rem 0;
    }
    
    .kv-table td {
        font-size: 0.8125rem;
        padding: 0.5rem 0;
    }
    
    .pro-banner {
        flex-direction: column;
        text-align: center;
    }
    
    /* Radio cards (DMARC generator) */
    .radio-group {
        gap: 0.75rem;
    }
    
    .radio-card-content {
        padding: 0.875rem;
    }
    
    .radio-card-title {
        font-size: 0.875rem;
    }
    
    .radio-card-code {
        font-size: 0.75rem;
        margin-bottom: 0.375rem;
    }
    
    .radio-card-desc {
        font-size: 0.75rem;
        line-height: 1.4;
    }
    
    /* Form sections */
    .form-section {
        padding: 1rem;
    }
    
    .form-section-title {
        font-size: 1rem;
    }
    
    .step-number {
        width: 1.5rem;
        height: 1.5rem;
        font-size: 0.75rem;
    }
    
    /* Result cards */
    .result-card-body {
        padding: 1rem;
    }
    
    .code-block {
        font-size: 0.75rem;
        padding: 0.75rem;
        word-break: break-all;
    }
    
    /* Auth cards (Email Auth Check) */
    .auth-card-header {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
        gap: 0.5rem;
    }
    
    .auth-card-title {
        font-size: 1rem;
    }
    
    .auth-icon {
        font-size: 1rem;
    }
    
    .auth-card-body {
        padding: 1rem;
    }
    
    .auth-summary,
    .auth-details {
        font-size: 0.8125rem;
    }
    
    /* Check list items */
    .check-item {
        gap: 0.75rem;
        padding: 0.75rem 0;
    }
    
    .check-icon {
        width: 1.75rem;
        height: 1.75rem;
        font-size: 0.875rem;
    }
    
    .check-title {
        font-size: 0.875rem;
    }
    
    .check-description {
        font-size: 0.8125rem;
    }
    
    /* Score display */
    .score-display {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .score-number {
        font-size: 2.5rem;
    }
}

/* ===== ERROR MESSAGE ===== */
.error-message {
    background: var(--color-error-light);
    border: 1px solid rgba(239, 68, 68, 0.2);
    color: var(--color-error);
    padding: 1rem 1.25rem;
    border-radius: var(--radius);
    margin: 1rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.error-message-icon {
    font-size: 1.25rem;
}

/* ===== GENERATOR FORM STYLES ===== */
.generator-form {
    padding: 0;
    background: none;
    border: none;
}

.form-section {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.form-section-title {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    margin: 0 0 1.25rem 0;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.step-number {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--accent-color) 100%);
    color: white;
    border-radius: 50%;
    font-size: 0.875rem;
    font-weight: 700;
}

.form-section-collapsible {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.form-section-summary {
    padding: 1.25rem 1.5rem;
    cursor: pointer;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.form-section-summary:hover {
    background: var(--color-bg-tertiary);
}

.form-section-content {
    padding: 0 1.5rem 1.5rem 1.5rem;
}

.tool-form-group {
    margin-bottom: 1.25rem;
}

.tool-form-group:last-child {
    margin-bottom: 0;
}

.tool-label {
    display: block;
    font-weight: 600;
    font-size: 0.9375rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.tool-hint {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    margin-top: 0.5rem;
}

.tool-select {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    background: var(--color-bg);
    color: var(--color-text);
    cursor: pointer;
    transition: border-color 0.2s, box-shadow 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%236b7280' viewBox='0 0 16 16'%3E%3Cpath d='M8 11L3 6h10l-5 5z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

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

.tool-range {
    width: 100%;
    height: 0.5rem;
    border-radius: 9999px;
    appearance: none;
    background: var(--color-border);
    cursor: pointer;
}

.tool-range::-webkit-slider-thumb {
    appearance: none;
    width: 1.25rem;
    height: 1.25rem;
    border-radius: 50%;
    background: var(--color-primary);
    cursor: pointer;
    transition: transform 0.2s;
}

.tool-range::-webkit-slider-thumb:hover {
    transform: scale(1.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 640px) {
    .form-row {
        grid-template-columns: 1fr;
    }
}

/* ===== RADIO CARDS ===== */
.radio-group {
    display: grid;
    gap: 1rem;
}

.radio-card {
    display: block;
    cursor: pointer;
}

.radio-card input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.radio-card-content {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
    transition: all 0.2s;
}

.radio-card:hover .radio-card-content {
    border-color: var(--color-primary-light);
    background: var(--color-bg-tertiary);
}

.radio-card input:checked + .radio-card-content,
.radio-card.radio-card-selected .radio-card-content {
    border-color: var(--color-primary);
    background: var(--color-primary-light);
}

.radio-card-title {
    font-weight: 600;
    font-size: 1rem;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.radio-card-code {
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.radio-card-desc {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

/* ===== TOOL BUTTONS LARGE ===== */
.tool-btn-large {
    width: 100%;
    padding: 1rem 1.5rem;
    font-size: 1.125rem;
    justify-content: center;
}

.tool-btn-copy {
    display: inline-flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

.tool-btn-copy:hover {
    background: var(--color-bg-tertiary);
    color: var(--color-text);
}

/* ===== DNS HOST INFO ===== */
.dns-host-info {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
}

.dns-label {
    font-weight: 500;
    color: var(--color-text-secondary);
}

.dns-host {
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    padding: 0.375rem 0.75rem;
    border-radius: var(--radius);
    font-size: 0.9375rem;
}

/* ===== INFO BOX LIST ===== */
.info-box-list {
    margin: 0.5rem 0 0 1.25rem;
    padding: 0;
}

.info-box-list li {
    margin-bottom: 0.25rem;
}

/* ===== RESULT CARD HIGHLIGHT ===== */
.result-card-highlight {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 1px var(--color-primary);
}

.result-card-highlight .result-card-header {
    background: var(--color-primary-light);
}

/* ===== TAG LIST ===== */
.tag-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    display: inline-flex;
    align-items: center;
    padding: 0.375rem 0.75rem;
    font-size: 0.8125rem;
    font-family: var(--font-mono);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    color: var(--color-text-secondary);
}

.tag-primary {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ===== RESULT HERO ===== */
.result-hero {
    text-align: center;
    padding: 2rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    margin-bottom: 1.5rem;
}

.result-hero-status {
    font-size: 3rem;
    margin-bottom: 0.75rem;
}

.result-hero-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-text);
    margin: 0 0 0.5rem 0;
}

/* ===== SCORE DISPLAY ===== */
.score-display {
    display: flex;
    justify-content: center;
    align-items: baseline;
    gap: 0.25rem;
    margin-top: 1rem;
}

.score-number {
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-primary);
}

.score-label {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
}

.score-bar-container {
    width: 100%;
    max-width: 300px;
    height: 8px;
    background: var(--color-border);
    border-radius: 9999px;
    margin: 1rem auto 0;
    overflow: hidden;
}

.score-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-primary) 0%, var(--accent-color) 100%);
    border-radius: 9999px;
    transition: width 0.5s ease-out;
}

/* ===== AUTH CARDS ===== */
.auth-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-left-width: 4px;
    border-radius: var(--radius);
    margin-bottom: 1rem;
    overflow: hidden;
}

.auth-card.auth-pass {
    border-left-color: var(--color-success);
}

.auth-card.auth-warning {
    border-left-color: var(--color-warning);
}

.auth-card.auth-fail {
    border-left-color: var(--color-error);
}

.auth-card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.25rem;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
}

.auth-card-title {
    font-weight: 600;
    font-size: 1.125rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.auth-icon {
    font-size: 1.25rem;
}

.auth-card-body {
    padding: 1.25rem;
}

.auth-summary {
    color: var(--color-text);
    margin: 0;
}

.auth-details {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin: 0.5rem 0 0 0;
}

/* ===== COMPARE FORM ===== */
.compare-form {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    flex-wrap: wrap;
}

.compare-input {
    flex: 1;
    min-width: 200px;
}

.compare-input label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.compare-icon {
    font-size: 1.5rem;
    color: var(--color-text-muted);
    padding-bottom: 0.5rem;
}

.tool-form-actions {
    text-align: center;
    margin-top: 1.5rem;
}

/* ===== COMPARISON ROWS ===== */
.comparison-row {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.comparison-row.comparison-empty {
    background: var(--color-bg-secondary);
    opacity: 0.7;
}

.comparison-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.75rem;
    flex-wrap: wrap;
}

.comparison-desc {
    flex: 1;
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
}

.comparison-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin-top: 0.75rem;
}

.comparison-side {
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
}

.comparison-domain {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.comparison-value {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.25rem;
}

.comparison-value code {
    word-break: break-all;
}

.comparison-unique {
    color: var(--color-warning);
}

.comparison-unique-alt {
    color: var(--color-info);
}

.comparison-empty-text {
    color: var(--color-text-muted);
    font-style: italic;
    font-size: 0.9375rem;
}

.result-header-warning {
    background: var(--color-warning-light);
}

.difference-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.difference-list li {
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--color-border);
}

.difference-list li:last-child {
    border-bottom: none;
}

/* ===== TECH STACK STYLES ===== */
.tech-category-box {
    align-items: flex-start;
}

.tech-category-box .tech-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
    margin-top: 0.125rem;
}

.tech-category-content {
    flex: 1;
    min-width: 0;
}

.tech-category-label {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.025em;
}

.tech-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.375rem;
}

.tech-item:last-child {
    margin-bottom: 0;
}

.tech-item strong {
    color: var(--color-text);
}

.tech-item .tech-source {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.kv-table-compact {
    margin-top: 0.25rem;
}

.kv-table-compact .kv-row {
    padding: 0.375rem 0;
}

/* Legacy styles - keep for backward compatibility */
.tech-category {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin-top: 0.75rem;
}

.tech-category:first-of-type {
    margin-top: 1rem;
}

.tech-category-title {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin: 0 0 0.625rem 0;
    font-weight: 600;
}

.tech-icon {
    font-size: 1rem;
}

.tech-grid {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.tech-card {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.tech-info {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tech-info strong {
    color: var(--color-text);
}

.tech-source {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.server-info-card {
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    padding: 1rem 1.25rem;
    margin-top: 1.25rem;
}

.server-info-card h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin: 0 0 0.75rem 0;
    font-weight: 600;
}

.server-info-card .kv-table {
    margin: 0;
}

.result-meta {
    font-size: 0.75rem;
    color: var(--color-text-muted);
    margin-top: 1.25rem;
    padding: 0.75rem 1rem;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.result-meta .result-meta-label {
    opacity: 0.8;
}

.result-meta .tag-list {
    display: flex;
    gap: 0.25rem;
    flex-wrap: wrap;
    margin: 0;
}

.result-meta .tag-list .tag {
    font-size: 0.6875rem;
    padding: 0.1875rem 0.5rem;
    background: var(--color-bg-secondary);
    opacity: 0.85;
    border-radius: 4px;
}

/* ===== REDIRECT CHAIN STYLES ===== */
.redirect-chain {
    margin: 1.5rem 0;
}

.redirect-hop {
    display: flex;
    gap: 1rem;
}

.redirect-hop-final .hop-content {
    border-color: var(--color-success);
}

.hop-number {
    flex-shrink: 0;
}

.hop-badge {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: 50%;
    font-weight: 600;
    font-size: 0.875rem;
}

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

.hop-badge.hop-redirect {
    background: var(--color-primary);
    color: white;
}

.hop-badge.hop-error {
    background: var(--color-error);
    color: white;
}

.hop-badge.hop-neutral {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.hop-content {
    flex: 1;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 0.875rem 1rem;
}

.hop-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
}

.hop-status-desc {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
}

.hop-time {
    margin-left: auto;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.hop-url {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
}

.hop-url code {
    word-break: break-all;
    font-size: 0.9375rem;
}

.hop-secure {
    color: var(--color-success);
}

.hop-insecure {
    color: var(--color-warning);
}

.hop-redirect {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.5rem;
    flex-wrap: wrap;
}

.hop-arrow {
    color: var(--color-text-muted);
}

.hop-location {
    color: var(--color-text-secondary);
    font-size: 0.875rem;
    word-break: break-all;
}

.hop-final {
    margin-top: 0.5rem;
}

.hop-connector {
    text-align: center;
    color: var(--color-text-muted);
    padding: 0.25rem 0;
    font-size: 1.25rem;
}

.issue-list, .recommendation-list {
    list-style: none;
    padding: 0;
    margin: 0.75rem 0 0 0;
}

.issue-list li, .recommendation-list li {
    padding: 0.375rem 0;
    padding-left: 1.25rem;
    position: relative;
}

.issue-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-error);
}

.recommendation-list li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--color-info);
}

.section-error {
    color: var(--color-error);
    font-size: 1rem;
    margin: 0 0 0.5rem 0;
}

.section-info {
    color: var(--color-info);
    font-size: 1rem;
    margin: 1rem 0 0.5rem 0;
}

/* ===== PROTOCOL GRID (HTTP Version) ===== */
.protocol-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin: 1.5rem 0;
}

.protocol-card {
    text-align: center;
    padding: 1.5rem 1rem;
    border-radius: var(--radius);
    border: 2px solid var(--color-border);
    background: var(--color-bg);
    transition: transform 0.2s;
}

.protocol-card.protocol-supported {
    border-color: var(--color-success);
}

.protocol-card.protocol-warning {
    border-color: var(--color-warning);
}

.protocol-card.protocol-unsupported {
    border-color: var(--color-error);
}

.protocol-card.protocol-neutral {
    border-color: var(--color-border);
    opacity: 0.7;
}

.protocol-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.protocol-card h4 {
    margin: 0 0 0.5rem 0;
    font-size: 1rem;
    color: var(--color-text);
}

.protocol-status {
    font-size: 0.875rem;
    color: var(--color-text-secondary);
}

.protocol-time {
    display: block;
    color: var(--color-success);
    margin-top: 0.25rem;
}

.highest-protocol {
    text-align: center;
    margin: 1rem 0 1.5rem 0;
}

.tag-dark {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

/* ===== STATS GRID ===== */
.stats-grid-4 {
    grid-template-columns: repeat(4, 1fr);
}

.stats-grid-5 {
    grid-template-columns: repeat(5, 1fr);
}

/* ===== DETAILS/SUMMARY ===== */
.details-summary {
    cursor: pointer;
    padding: 1rem 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-sm);
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.details-summary:hover {
    background: var(--color-bg-tertiary);
}

details[open] .details-summary {
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
}

details > .code-block {
    border-radius: 0 0 var(--radius-sm) var(--radius-sm);
    margin: 0;
}

/* Details as result-section in result-card */
.result-card details.result-section {
    border-top: 1px solid var(--color-border);
}

.result-card details.result-section .details-summary {
    border-radius: 0;
    background: var(--color-bg);
}

.result-card details.result-section .code-block {
    margin: 0 1.5rem 1.5rem;
    border-radius: var(--radius);
}

/* ===== CHECK CONTENT IMPROVEMENTS ===== */
.check-content {
    flex: 1;
}

.check-header {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
    margin-bottom: 0.5rem;
}

.check-header strong {
    font-weight: 600;
    color: var(--color-text);
}

/* Check content's code block (for header values etc) */
.check-content .code-block {
    margin: 0.75rem 0;
    padding: 0.75rem 1rem;
    font-size: 0.8125rem;
}

.check-description {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin: 0.5rem 0 0 0;
    line-height: 1.5;
}

.check-recommendation {
    color: var(--color-primary);
    font-size: 0.9375rem;
    font-style: italic;
    margin: 0.5rem 0 0 0;
}

/* ===== SCORE DISPLAY IMPROVEMENTS ===== */
.score-display.score-excellent {
    background: var(--color-success);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1.25rem;
}

.score-display.score-good {
    background: var(--color-success);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1.25rem;
}

.score-display.score-warning {
    background: var(--color-warning);
    color: var(--color-text);
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1.25rem;
}

.score-display.score-error {
    background: var(--color-error);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: var(--radius);
    font-weight: 700;
    font-size: 1.25rem;
}

/* ===== LEARN GRID ===== */
.learn-grid-3 {
    grid-template-columns: repeat(3, 1fr);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .protocol-grid {
        grid-template-columns: 1fr;
    }
    
    .comparison-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stats-grid-5 {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .learn-grid-3 {
        grid-template-columns: 1fr;
    }
    
    .compare-form {
        flex-direction: column;
    }
    
    .compare-icon {
        display: none;
    }
}

/* ===== RESULT HEADER ===== */
.result-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--color-bg-secondary);
    border-bottom: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.result-header h3 {
    margin: 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.result-subtitle {
    color: var(--color-text-secondary);
    font-size: 0.9375rem;
    margin: 0;
    padding: 0 1.5rem 1rem;
}

/* ===== STATS GRID ===== */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    padding: 1.5rem;
}

.stat-card {
    text-align: center;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius);
    border: 1px solid var(--color-border);
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 0.25rem;
}

.stat-value small {
    font-size: 0.875rem;
    font-weight: 500;
}

.stat-value.stat-primary {
    color: var(--color-primary);
}

.stat-value.stat-success {
    color: var(--color-success);
}

.stat-value.stat-warning {
    color: var(--color-warning);
}

.stat-value.stat-error {
    color: var(--color-error);
}

.stat-value.stat-info {
    color: var(--color-info, #3b82f6);
}

.stat-label {
    display: block;
    font-size: 0.8125rem;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ===== SHARE SECTION ===== */
.share-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    flex-wrap: wrap;
}

.share-section span {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    white-space: nowrap;
}

.share-section .tool-input {
    flex: 1;
    min-width: 200px;
    font-size: 0.875rem;
    padding: 0.625rem 0.875rem;
    background: var(--color-bg);
}

/* ===== PRO BANNER (improved) ===== */
.pro-icon {
    font-size: 2.5rem;
    flex-shrink: 0;
}

.pro-content {
    flex: 1;
    min-width: 200px;
}

.pro-content h4 {
    margin: 0 0 0.375rem 0;
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
}

.pro-content p {
    margin: 0;
    font-size: 0.9375rem;
    opacity: 0.9;
}

.pro-btn {
    padding: 0.75rem 1.5rem;
    background: white;
    color: var(--color-primary);
    font-weight: 600;
    border-radius: var(--radius);
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}

.pro-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.2);
}

/* ===== LEARN GRID & CARDS ===== */
.learn-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
    margin: 1.5rem 0;
}

.learn-card {
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 1.25rem;
}

.learn-card h4 {
    margin: 0 0 0.75rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.learn-card ul {
    margin: 0;
    padding-left: 1.25rem;
    color: var(--color-text-secondary);
}

.learn-card li {
    margin-bottom: 0.375rem;
}

.learn-card li:last-child {
    margin-bottom: 0;
}

.learn-section h4 {
    margin: 1.5rem 0 1rem;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ===== INFO BOX CONTENT STRUCTURE ===== */
.info-box {
    display: block;
    padding: 1rem 1.25rem;
}

.info-box strong {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
    font-weight: 600;
}

.info-box p {
    margin: 0.5rem 0 0 0;
    color: var(--color-text-secondary);
}

.info-box ul {
    margin: 0.5rem 0 0 1.25rem;
    padding: 0;
}

.info-box li {
    margin-bottom: 0.25rem;
}

/* ===== TAG VARIANTS ===== */
.tag-success {
    background: var(--color-success-light);
    border-color: var(--color-success);
    color: var(--color-success);
}

.tag-warning {
    background: var(--color-warning-light);
    border-color: var(--color-warning);
    color: var(--color-warning);
}

.tag-error {
    background: var(--color-error-light);
    border-color: var(--color-error);
    color: var(--color-error);
}

.tag-info {
    background: var(--color-primary-light);
    border-color: var(--color-primary);
    color: var(--color-primary);
}

/* ===== STATUS NEUTRAL ===== */
.status-neutral {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

/* ===== KV ROW STYLES (for TechStack) ===== */
.kv-row {
    display: flex;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--color-border-light, var(--color-border));
}

.kv-row:last-child {
    border-bottom: none;
}

.kv-key {
    width: 140px;
    flex-shrink: 0;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.kv-value {
    flex: 1;
    color: var(--color-text);
}

/* ===== CODE KEY STYLES ===== */
.code-key {
    color: var(--color-primary);
    font-weight: 500;
}

/* ===== RESULT CARD PADDING FIX ===== */
.result-card > .result-section {
    padding: 1.5rem;
    border-top: 1px solid var(--color-border);
}

.result-card > .result-section h4 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

.result-card > .result-section:first-child {
    border-top: none;
}

.result-card .check-list {
    margin: 0;
}

/* Nested check-list in result-card without result-section wrapper */
.result-card > .check-list {
    padding: 0 1.5rem 1.5rem;
}

.result-card .data-table {
    margin: 0;
}

.result-card > .tag-list {
    padding: 1rem 1.5rem;
}

.result-card > .info-box {
    margin: 1rem 1.5rem;
    border-radius: var(--radius);
}

.result-card > .info-box:first-child {
    margin-top: 1.5rem;
}

/* Info-box tag-list spacing */
.info-box .tag-list {
    margin-top: 0.75rem;
}

/* Result section with h4 inside */
.result-section h4 {
    margin: 0 0 1rem 0;
    font-size: 1rem;
    font-weight: 600;
    color: var(--color-text);
}

/* ===== COLOR INFO VARIABLE ===== */
:root {
    --color-info: #3b82f6;
}

[data-theme="dark"] {
    --color-info: #60a5fa;
}

/* ===== RESPONSIVE IMPROVEMENTS ===== */
@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .stat-value {
        font-size: 1.5rem;
    }
    
    .share-section {
        flex-direction: column;
        align-items: stretch;
    }
    
    .share-section span {
        text-align: center;
    }
    
    .learn-grid {
        grid-template-columns: 1fr;
    }
    
    .result-header {
        padding: 1rem;
    }
    
    .result-header h3 {
        font-size: 1rem;
    }
}
/* ===== RELATED CONTENT SECTIONS ===== */
.related-content {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Remove border when related content is directly after article header */
.article-header + .related-content {
    border-top: none;
    margin-top: 2rem;
    padding-top: 0;
}

.related-section h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text-primary);
}

/* Related Tools Grid */
.related-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 0.75rem;
}

.related-tool-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.875rem 1rem;
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    text-decoration: none;
    color: var(--color-text-primary);
    transition: all 0.2s ease;
}

.related-tool-card:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-primary);
    transform: translateY(-1px);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

.related-tool-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
}

.related-tool-title {
    font-size: 0.9375rem;
    font-weight: 500;
}

/* Related Topics List */
.related-topics-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.related-topics-list li {
    margin: 0;
}

.related-topics-list a {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 0.75rem;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.9375rem;
    border-radius: var(--radius);
    transition: all 0.2s ease;
}

.related-topics-list a:hover {
    background: var(--color-bg-secondary);
    color: var(--accent-color);
}

@media (max-width: 640px) {
    .related-tools-grid {
        grid-template-columns: 1fr;
    }
}