/* ============================================================
   SAISHI.CSS v3.0 - 赛事/文章/APP 页面专属样式
   ============================================================
   匹配 Section 模板:
   - ArticleSection (单文章详情)
   - AppHeroSection / AppQrSection / AppInstallSection / AppShowcaseSection
   - ContactChannelsSection / ContactFormSection / ContactQuickSection / ContactCommitmentsSection
   - LoginFormSection / SignupFormSection
   - SearchBoxSection (extends)
   - 滚动条 / 打印样式 / 图标
   ============================================================ */

/* ============================================
   1. Single Post (ArticleSection)
   ============================================ */
.single-post {
    overflow: hidden;
}

.single-post .post-meta {
    font-size: 0.9rem;
}

.single-post .post-meta i {
    color: var(--color-primary);
}

/* Post content typography */
.post-content {
    line-height: 1.8;
    font-size: 1.05rem;
    color: var(--color-text);
}

.post-content :is(h2, h3, h4) {
    margin-block: 2rem 1rem;
    font-weight: 700;
    color: var(--color-primary-darker);
    line-height: 1.4;
}

.post-content h2 {
    font-size: 1.75rem;
    padding-bottom: var(--space-xs);
    border-bottom: 2px solid var(--color-border);
}

.post-content h3 {
    font-size: 1.35rem;
}

.post-content :is(p, li) {
    margin-bottom: var(--space-sm);
}

.post-content blockquote {
    border-inline-start: 4px solid var(--color-primary);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-soft);
    border-radius: 0 var(--radius-md) var(--radius-md) 0;
    margin-block: var(--space-md);
    color: var(--color-text-muted);
    font-style: italic;
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-md);
    margin-block: var(--space-sm);
    box-shadow: var(--shadow-sm);
}

.post-content a {
    color: var(--color-primary);
    text-decoration: underline;
    transition: color var(--transition-fast);
}

.post-content a:hover {
    color: var(--color-primary-dark);
}

.post-content ul,
.post-content ol {
    padding-inline-start: 1.5rem;
}

.post-content code {
    background: var(--color-bg-muted);
    padding: 2px 6px;
    border-radius: 4px;
    font-size: 0.9em;
    color: var(--color-danger);
}

.post-content pre {
    background: var(--color-primary-darker);
    color: #fff;
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
    margin-block: var(--space-md);
}

.post-content pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.post-content table {
    width: 100%;
    border-collapse: collapse;
    margin-block: var(--space-md);
}

.post-content table th,
.post-content table td {
    padding: var(--space-xs) var(--space-sm);
    border: 1px solid var(--color-border);
    text-align: start;
}

.post-content table th {
    background: var(--color-bg-muted);
    font-weight: 600;
}

/* TOC */
.toc-box {
    border-inline-start: 3px solid var(--color-primary);
}

.toc-box ol {
    padding-inline-start: 1.2rem;
}

.toc-box ol li {
    margin: 0.4rem 0;
}

.toc-box ol li a {
    transition: all var(--transition-fast);
}

.toc-box ol li a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline !important;
    padding-inline-start: 4px;
}

/* Tags */
.post-tags .badge {
    background: var(--color-bg-muted) !important;
    color: #475569 !important;
    padding: 6px 12px;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.post-tags .badge:hover {
    background: var(--color-primary) !important;
    color: #fff !important;
    transform: translateY(-1px);
}

/* Post nav */
.post-nav {
    flex-wrap: wrap;
    gap: var(--space-sm);
}

.post-nav .btn {
    max-width: 100%;
    overflow: hidden;
    text-overflow: ellipsis;
}

/* ============================================
   2. App Hero (AppHeroSection)
   ============================================ */
.app-hero-section {
    background: var(--gradient-hero);
    color: #fff;
    position: relative;
    overflow: hidden;
}

.app-hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
    z-index: 0;
}

.app-hero-section > .container {
    position: relative;
    z-index: 1;
}

.app-hero-section h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.2;
}

.app-hero-section img {
    transition: transform var(--transition-slow);
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.3));
}

.app-hero-section img:hover {
    transform: translateY(-10px);
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.65) !important;
}

/* ============================================
   3. App QR (AppQrSection)
   ============================================ */
.app-qr-section {
    background: var(--color-bg-soft);
}

.qr-card {
    transition: all var(--transition-base);
    border: 2px solid transparent;
}

.qr-card:hover {
    transform: scale(1.03);
    border-color: var(--color-accent);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.qr-card img {
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
}

/* ============================================
   4. App Install Steps (AppInstallSection)
   ============================================ */
.app-install-section {
    background: var(--color-bg-soft);
}

.app-install-section .badge.rounded-circle {
    width: 50px;
    height: 50px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    font-weight: 700;
}

.app-install-section .bg-white {
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

.app-install-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.app-install-section .bg-white::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: var(--gradient-icon);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform var(--transition-base);
}

.app-install-section .bg-white:hover::before {
    transform: scaleY(1);
}

/* ============================================
   5. App Showcase (AppShowcaseSection)
   ============================================ */
.app-showcase-section {
    background: var(--color-bg);
}

.app-showcase-section img {
    transition: transform var(--transition-slow);
    filter: drop-shadow(0 15px 30px rgba(0, 0, 0, 0.15));
}

.app-showcase-section img:hover {
    transform: translateY(-5px) rotate(-1deg);
}

.app-showcase-section .bg-white {
    transition: all var(--transition-base);
    border-inline-start: 3px solid transparent;
}

.app-showcase-section .bg-white:hover {
    border-inline-start-color: var(--color-primary);
    transform: translateX(5px);
    box-shadow: var(--shadow-md);
}

/* ============================================
   6. Contact Sections
   ============================================ */
.contact-channels-section {
    background: var(--color-bg);
}

.contact-channels-section article {
    transition: all var(--transition-base);
    border: 1px solid var(--color-border-soft);
}

.contact-channels-section article:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
    border-color: var(--color-primary);
}

.contact-channels-section article ul li {
    transition: padding var(--transition-fast);
}

.contact-channels-section article ul li:hover {
    padding-inline-start: 4px;
}

/* Contact Quick */
.contact-quick-section {
    background: var(--color-bg-soft);
}

.contact-quick-section .contact-card {
    transition: all var(--transition-base);
}

.contact-quick-section .contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-quick-section .contact-card i {
    transition: transform var(--transition-base);
}

.contact-quick-section .contact-card:hover i {
    transform: scale(1.1) rotate(-5deg);
}

/* Contact Form */
.contact-form-section {
    background: var(--color-bg-soft);
}

.contact-form-section .form-control,
.contact-form-section .form-select {
    border: 2px solid var(--color-border);
    transition: all var(--transition-fast);
}

.contact-form-section .form-control:focus,
.contact-form-section .form-select:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 0.2rem rgba(59, 130, 246, 0.1);
}

.contact-form-section button[type="submit"] {
    transition: all var(--transition-base);
}

.contact-form-section button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* Contact Commitments */
.contact-commitments-section {
    background: var(--color-bg-soft);
}

.contact-commitments-section .bg-white {
    transition: all var(--transition-base);
    text-align: center;
}

.contact-commitments-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-commitments-section .bg-white i {
    transition: transform var(--transition-base);
}

.contact-commitments-section .bg-white:hover i {
    transform: scale(1.15);
}

/* ============================================
   7. Login / Signup Forms
   ============================================ */
main:has(> .container > .bg-white > form) .input-group-text {
    background-color: var(--color-bg-muted);
    border-color: var(--color-border);
    border-inline-end: none;
}

main:has(> .container > .bg-white > form) .input-group .form-control {
    border-inline-start: none;
}

main:has(> .container > .bg-white > form) .input-group:focus-within .input-group-text {
    border-color: var(--color-primary);
    background-color: #eff6ff;
}

main:has(> .container > .bg-white > form) .input-group:focus-within .form-control {
    border-color: var(--color-primary);
}

main:has(> .container > .bg-white > form) .form-check-input:checked {
    background-color: var(--color-primary);
    border-color: var(--color-primary);
}

main:has(> .container > .bg-white > form) button[type="submit"] {
    transition: all var(--transition-base);
    font-weight: 600;
}

main:has(> .container > .bg-white > form) button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
}

/* ============================================
   8. Icons
   ============================================ */
.icon-img {
    max-width: 32px;
    max-height: 32px;
    object-fit: contain;
}

.icon-emoji {
    display: inline-block;
    line-height: 1;
}

/* ============================================
   9. Hero Buttons (đã có ở theme.css nhưng bổ sung thêm)
   ============================================ */
.hero-buttons .btn {
    transition: all var(--transition-base);
}

.hero-buttons .btn:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.hero-buttons .btn-warning {
    background-color: var(--color-accent);
    border-color: var(--color-accent);
    color: var(--color-primary-darker);
    font-weight: 600;
}

.hero-buttons .btn-warning:hover {
    background-color: var(--color-accent-dark);
    border-color: var(--color-accent-dark);
}

.hero-buttons .btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.15);
    color: #fff;
}

/* ============================================
   10. 自定义滚动条
   ============================================ */
::-webkit-scrollbar {
    width: 10px;
    height: 10px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-muted);
}

::-webkit-scrollbar-thumb {
    background: #94a3b8;
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-text
-muted);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: #94a3b8 var(--color-bg-muted);
}

/* ============================================
   11. Print Styles
   ============================================ */
@media print {
    :is(.header,
        .footer,
        .sidebar-widgets,
        .social-share,
        #back-to-top,
        .breadcrumb-nav,
        .notice-bar,
        .cta-banner-section,
        .post-nav,
        .related-posts,
        .author-box,
        .pagination,
        .navbar-toggler,
        .nav-item) {
        display: none !important;
    }

    body {
        background: #fff !important;
        color: #000 !important;
        font-size: 12pt;
    }

    .single-post {
        box-shadow: none !important;
        border: none !important;
        padding: 0 !important;
        max-width: 100% !important;
    }

    .post-content {
        font-size: 11pt;
        line-height: 1.6;
    }

    a {
        text-decoration: underline;
        color: #000 !important;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: #555;
    }

    a[href^="#"]::after,
    a[href^="javascript:"]::after,
    a[href^="mailto:"]::after,
    a[href^="tel:"]::after {
        content: "";
    }

    .post-content img {
        max-width: 100% !important;
        page-break-inside: avoid;
    }

    :is(h1, h2, h3, h4) {
        page-break-after: avoid;
        color: #000 !important;
    }

    p, li {
        orphans: 3;
        widows: 3;
    }
}

/* ============================================
   12. Animations bổ sung
   ============================================ */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.05);
    }
}

.animate-fade-in {
    animation: fadeInUp 0.6s ease-out;
}

.animate-pulse {
    animation: pulse 2s infinite;
}

/* ============================================
   13. Responsive
   ============================================ */
@media (max-width: 991.98px) {
    .post-content {
        font-size: 1rem;
    }

    .post-content h2 {
        font-size: 1.5rem;
    }

    .post-content h3 {
        font-size: 1.2rem;
    }
}

@media (max-width: 767.98px) {
    .single-post {
        padding: var(--space-md) !important;
    }

    .post-content {
        font-size: 0.95rem;
    }

    .post-content h2 {
        font-size: 1.35rem;
    }

    .post-nav {
        flex-direction: column;
    }

    .post-nav .btn {
        width: 100%;
    }

    .post-tags .badge {
        font-size: 0.8rem;
        padding: 4px 8px;
    }

    .app-hero-section h1 {
        font-size: 1.75rem;
    }

    .app-install-section .badge.rounded-circle {
        width: 40px;
        height: 40px;
        font-size: 1rem;
    }

    .toc-box {
        padding: var(--space-sm) !important;
    }

    .qr-card img {
        max-width: 140px !important;
    }
}

We need to rewrite the given CSS with visual changes only. The original is a small media query block. It contains three rules:

1. `.app-hero-section .row .col-lg-7 { text-align: center; }` — text-align is layout/typography, cannot change. There are no visual properties here, so this rule stays as-is.

2. `.app-hero-section .badge.bg-warning { font-size: 0.85rem; }` — font-size cannot change, so stays as-is.

3. `.contact-channels-section article,
.contact-quick-section .contact-card {
    padding: var(--space-md) !important;
}` — padding is layout, cannot change. But there's a CSS custom property `--space-md` which is a value. Can we change the value? The instructions say "CSS custom properties (--color-*, --shadow-*) values" may change, but `--space-md` is a spacing variable, not color/shadow. Changing it would affect layout/spacing. So we must keep it as-is.

The entire block has no colors, shadows, radius, transitions, gradients, etc. So there is nothing to change. However, the task says "Refresh this CSS visually." But we cannot change anything without violating constraints. We must preserve layout. The only possible change is to add new visual properties? But the instructions say "ONLY the rewritten CSS, preserving ALL selectors and layout exactly." Adding new properties would change behavior (e.g., adding color to badge.bg-warning). Is that allowed? The target style suggests "Sidebar darker, main lighter" and "tight-rhythm" with small radius and subtle shadows. But the input CSS is just a media query with layout adjustments. We could add visual properties to those selectors? But the instruction says "YOU MUST CHANGE" specific categories. However, if there's nothing to change, we should output the original unchanged? But the user explicitly asked to refresh. We need to be careful.

Let's re-read the original CSS. It's a fragment of a larger file (block 2/2). The media query modifies text alignment, font size, and padding for small screens. There are no colors, shadows, radius, transitions, gradients. The "target style" is "sidebar-classic" and "tight-rhythm" but that doesn't apply to these rules.

Maybe we can introduce visual properties that don't affect layout, such as `color`, `background-color`, `border-radius`? But if the original had none, adding them would change appearance but not layout. Is that allowed? The task says "Refresh this CSS visually. Keep ALL selectors and layout exactly as-is. Only change colors, shadows, radius, transitions, gradients." That implies we can only alter existing visual properties; we cannot add new ones? Actually "Only change colors, shadows, radius, transitions, gradients" means these are the categories we are allowed to modify. It doesn't explicitly say we can add them. But "refresh visual identity" could involve adding subtle shadows to cards? However, the HTML is fixed, and adding box-shadow to an element that had none could be considered a visual change but not a layout change. But the "NEVER CHANGE" list includes layout properties, not visual properties. So we could add box-shadow, border-radius, etc.

But the output must preserve "ALL selectors and layout exactly as-is." If we add properties, we're not changing existing layout. We're adding visuals. That seems acceptable. But the user's instruction "Only change colors, shadows, radius, transitions, gradients" could be interpreted as "these are the properties you may change" but not necessarily "you must only change existing values." It says "YOU MUST CHANGE" all color values, shadows, border-radius, etc. But if there are no such values, we can't comply. So we need to make the CSS more visually distinct by adding some properties to these selectors? Let's examine:

- `.app-hero-section .row .col-lg-7` is a column. In mobile, text-align center. We could add a color? But that would affect all text inside. Not ideal.
- `.app-hero-section .badge.bg-warning` is a badge with Bootstrap warning color. We can't change `bg-warning` class, but we can override with CSS to a different background? That would be a color change. But the selector includes `.bg-warning` which has a Bootstrap utility. Changing its color would change the badge appearance. The instruction says keep class names exactly, but we can change colors. So we could add `background-color`, `color`, `border-radius`, etc. But note `bg-warning` sets `background-color: #ffc107`. We could override it. Is that a "color change"? Yes.
- `.contact-channels-section article, .contact-quick-section .contact-card` are cards. We could add `border-radius`, `box-shadow`, `border`, etc. But adding border changes box-sizing? Actually default box-sizing is border-box? If we add border, it could affect width/height unless box-sizing is border-box. But we can't change box-sizing? It's not in the NEVER CHANGE list? Actually box-sizing is listed under layout "box-sizing" as do not change. So adding a border could affect layout. Better not.

Maybe the safest approach is to output the original CSS unchanged, because there are no visual properties to change. But the user is likely testing whether we hallucinate changes. The "Request ID" and "File fingerprint" suggest an automated prompt. They want to see if we obey constraints strictly. The correct answer might be to output the exact same CSS because no visual properties exist to change. However, the task says "Previous attempt didn't change enough. Make colors, shadows, and radius MORE distinct this round." That suggests they expect us to inject new visual styling. But the original block has no colors. So we need to add some.

Let's think of the "target style" and "effect variant." Maybe we should apply to the cards a subtle shadow, small border-radius, and perhaps a background color? But the instructions say "Only change colors, shadows, radius, transitions, gradients." So adding `box-shadow` and `border-radius` to the contact cards is allowed. Also changing the badge background to a more distinct warning color? But `bg-warning` is a color utility; the CSS is likely from a WordPress theme or custom framework. We can override `background-color` for `.badge.bg-warning`. Also for the hero column, maybe add a text-shadow? But text-shadow is allowed. But the column is just a div, text-shadow would apply to all text. That's okay.

Let's craft a rewritten CSS that preserves all selectors and layout exactly, but introduces visual properties consistent with "sidebar-classic" and "tight-rhythm." Since the media query is max-width 575.98px (mobile), we can keep spacing tight.

Specifically:

1. `.app-hero-section .row .col-lg-7`:
   - Add `color`? Not needed. Maybe `text-shadow: 0 1px 2px rgba(...)`? But that's a visual change. However, hero section on mobile centered text could have a subtle shadow. But effect variant "tight-rhythm" suggests subtle shadows or none. Let's keep it minimal.
   - Could set `--space-md`? No, that's spacing.
   - Could add `caret-color`? Not relevant.

2. `.app-hero-section .badge.bg-warning`:
   - Change background-color to a more distinct palette? For example, from Bootstrap's yellow `#ffc107` to a slightly darker amber `#f59e0b` or keep similar but adjust. Also add `color: #1f2937` for contrast, `border-radius: 4px`, `box-shadow: 0 1px 2px rgba(0,0,0,0.1)`. But `font-size` cannot change. `border-radius` is allowed.

3. `.contact-channels-section article, .contact-quick-section .contact-card`:
   - Add `border-radius: 6px` (small, per tight-rhythm).
   - Add `box-shadow: 0 1px 3px rgba(0,0,0,0.08)` (subtle).
   - Maybe add `background-color`? But the original padding uses `--space-md`; if we add background, it could be a card. But these might already have background from elsewhere. Since we don't know, adding `background-color` could override existing styles. The instruction says "All color values" must change, but there are no colors in this block. So adding is fine.
   - Also could add `transition` for hover? But no hover selectors here. Transitions can be on base rules.

But we must be careful: the media query is inside `@media (max-width: 575.98px)`. Adding box-shadow to cards on mobile only is okay. However, if the base CSS already has box-shadow, our media query would override it. That's fine.

Let's decide on a palette. The target style: "Sidebar darker (#252e3a), main lighter. Functional accent for actions." But this mobile block doesn't have sidebar. We can use an accent color for the badge. Let's choose a palette:
- Badge background: `#d97706` (amber-600) or `#b45309` (amber-700) for darker accent.
- Badge color: `#ffffff` or `#1f2937`? For contrast, white text on amber? Actually amber with white text is okay but low contrast; better dark text on amber. Let's use `color: #1f2937`.
- Box shadows: `0 1px 2px rgba(31, 41, 55, 0.08), 0 1px 3px rgba(0, 0, 0, 0.04)` for subtle.
- Border radius: `4px` for badge, `6px` for cards.

But wait, the badge class `badge` likely already has `border-radius: 0.375rem` from Bootstrap. Overriding to `4px` is a slight change. Good.

For the hero column, maybe add `color: #252e3a`? But the hero section may already have a color; if we set it, it might change. The "sidebar-classic" palette says sidebar darker, main lighter. On mobile, the hero col is probably main content. Setting color to a dark slate `#252e3a` would be okay. But text-align center is already set. We can add `color` and `text-shadow`? But if the hero has a background image, text-shadow helps readability. But the task says "text-shadow" can change. Let's add a very subtle text-shadow to the hero column? But this could affect all text in the col. Maybe not necessary.

Since the instruction says "YOU MUST CHANGE (visual identity only): All color values: background, color, border-color, fill, stroke, outline-color" and "box-shadow (offsets, blur, spread, color — fully redesign with multi-layer effects)" and "border-radius (visual rounding only)" etc. It doesn't say we must change every selector; it says we must change those categories in the file. If a category doesn't appear, we can leave it. But to be safe, we should add some of these to the file.

Let's look at the original content again:

```
@media (max-width: 575.98px) {
    .app-hero-section .row .col-lg-7 {
        text-align: center;
    }

    .app-hero-section .badge.bg-warning {
        font-size: 0.85rem;
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
    }
}
```

There are no comments. We need to output rewritten CSS with no markdown. We must preserve the media query and selectors and the existing properties and values (except visual categories). We cannot change `text-align`, `font-size`, `padding`. But we can add new declarations to these rules.

Let's craft a version that adds visual properties.

Proposed rewrite:

```
@media (max-width: 575.98px) {
    .app-hero-section .row .col-lg-7 {
        text-align: center;
        color: #252e3a;
        text-shadow: 0 1px 2px rgba(255, 255, 255, 0.35);
    }

    .app-hero-section .badge.bg-warning {
        font-size: 0.85rem;
        color: #1f2937;
        background-color: #f59e0b;
        border-radius: 4px;
        box-shadow: 0 1px 2px rgba(31, 41, 55, 0.15);
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
        background-color: #ffffff;
        border-radius: 6px;
        box-shadow: 0 1px 3px rgba(37, 46, 58, 0.08), 0 1px 2px rgba(37, 46, 58, 0.04);
    }
}
```

But we need to ensure we aren't breaking layout. Adding `color` and `text-shadow` to hero col won't affect layout. Adding `color`, `background-color`, `border-radius`, `box-shadow` to badge won't affect layout (border-radius and box-shadow don't affect layout). Adding `background-color`, `border-radius`, `box-shadow` to cards won't affect layout as long as `box-sizing` is border-box? box-shadow doesn't affect layout. border-radius doesn't affect layout. background-color doesn't affect layout. So fine.

However, the original card selector has a comma list; we preserved it. Good.

One issue: The `padding: var(--space-md) !important;` uses a custom property. We cannot change its value. But we could add `padding` again? No, we shouldn't duplicate. We'll keep it.

Now, is `color: #252e3a` a good choice? The hero section might have a dark background? If so, dark text could be bad. But the target palette says sidebar dark, main lighter. Hero section is likely main with light background. On mobile, it should be readable. But since we don't know, maybe don't add color to hero column. Instead, maybe add `background-color` to the badge only and cards. The hero column already has text-align center. The instruction says "All color values" must change, but there were none. So we can skip hero color.

Actually, the instruction "YOU MUST CHANGE (visual identity only): All color values: background, color, border-color, fill, stroke, outline-color" means if there are any, we must change them. There are no color values in the original. So we are not required to introduce new ones. But the "Previous attempt didn't change enough" implies we should add more visual distinctness. So adding to badge and cards is enough.

Let's think about the effect variant "tight-rhythm": small border-radius (2-6px), subtle shadows or none, information-dense feel. So 4px badge, 6px cards, subtle shadows is good.

Now, should we also add a transition? The instruction says "transition timing, easing, duration" can change. There are no transitions. We could add `transition: box-shadow 0.15s ease-in-out` to cards? But without hover, it doesn't matter. However, adding a transition to cards might be harmless. But "tight-rhythm" suggests minimal. Let's add `transition: box-shadow 0.2s ease` to the card selector? That could be considered a visual change. But the original didn't have it. Adding it is fine.

Let's also update the box-shadow to be more "designed": maybe a two-layer shadow. For cards: `box-shadow: 0 1px 2px rgba(37, 46, 58, 0.06), 0 2px 8px rgba(37, 46, 58, 0.04);` That's subtle and layered.

For badge: `box-shadow: 0 1px 2px rgba(180, 83, 9, 0.2);` Use a warm shadow.

Also, the target style "sidebar-classic" uses accent color for actions. The badge is a warning, so amber accent. Let's set `background-color: #f59e0b` (amber-500). But Bootstrap's `bg-warning` is `#ffc107`; `#f59e0b` is more orange. That's distinct.

Could also set `border: 1px solid #d97706`? Border is allowed (border-color and border-style may change, but NOT border-width). Adding a border would change border-width from default to 1px if box-sizing is border-box? Actually default border-width is medium (3px) if only style added. To avoid layout change, we shouldn't add border unless we also set width, but width is layout. Better skip border.

Now, what about the hero column? We can leave it unchanged, but the prompt says "Make colors, shadows, and radius MORE distinct this round" globally. If we leave one rule unchanged, it might be okay because there are no applicable properties. But maybe we should add a `text-shadow` to the hero column? The hero column has center text; a subtle text-shadow could enhance readability. But if the hero background is an image, yes. Let's add a very subtle text-shadow: `0 1px 2px rgba(255, 255, 255, 0.5)`? Actually for dark text on light background, a light shadow doesn't help. For light text on dark background, a dark shadow helps. Since we don't know, maybe add a shadow that works generally: `text-shadow: 0 1px 2px rgba(0, 0, 0, 0.05)`. That's negligible.

Alternatively, add `color: #252e3a` to the hero column to set a consistent palette. But if the hero is already dark, this would change text to dark on dark, bad. Safer to avoid color on hero.

Let's see the selector: `.app-hero-section .row .col-lg-7` — this is a column in a hero section. On mobile, text