/* ============================================================
   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;
    }
}

The user wants me to refresh the CSS in the file `assets/css/saishi.css#块2/2` with a conservative mode, meaning I can only change visual properties (colors, shadows, radius, transitions, gradients, filters, opacity, outline styles, etc.) but NOT layout properties (display, position, grid, width, height, padding, margin, font properties, etc.).

The original CSS is:
```css
@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;
    }
}
```

Wait, this is a media query block. The selectors are:
- `.app-hero-section .row .col-lg-7`
- `.app-hero-section .badge.bg-warning`
- `.contact-channels-section article`
- `.contact-quick-section .contact-card`

The target style is editorial-magazine with sharp-edges effect variant:
- Hard offset shadows: 4px 4px 0px solid color
- Small or zero border-radius (0-4px)
- Strong borders (2-3px solid)
- Snappy transitions (0.15s)

Color palette:
- Editorial neutrals: cream/beige backgrounds (#f5f1e8), ink black text (#1a1a1a)
- Single accent color (deep red #c44536 or olive #6b705c)

However, the original CSS is quite minimal. It only has:
1. `text-align: center` — this is a layout property per the constraints (text-align is listed in the NEVER CHANGE section: "text-align, vertical-align"). So I cannot change that.
2. `font-size: 0.85rem` — font-size is in the NEVER CHANGE list. Cannot change.
3. `padding: var(--space-md) !important` — padding is in the NEVER CHANGE list, but can keep similar values ±20%. Since it's a var, I should keep it as-is.

So what can I actually change here? The constraints say I can only change:
- color values
- box-shadow
- text-shadow
- border-radius
- gradient colors
- transition timing/easing/duration
- filter, backdrop-filter
- opacity
- outline styles
- border-color and border-style
- caret-color, accent-color
- CSS custom properties (--color-*, --shadow-*) values

But the original CSS has none of these properties. Hmm. This is tricky.

Wait — the prompt says "Previous attempt didn't change enough. Make colors, shadows, and radius MORE distinct this round. Use a fresh palette."

But the original CSS block only contains layout/typography properties. It seems like I need to add visual properties to these selectors while keeping the existing ones.

Let me re-read the constraints:

"📐 LAYOUT (HTML cannot adapt to changes):
  • text-align, vertical-align" — these are protected, cannot change.

"📝 TYPOGRAPHY (font system fixed):
  • font-size" — protected.

So the existing declarations must stay. But I can ADD new visual declarations to these selectors — like background-color, border, box-shadow, border-radius, etc. That would be adding visual identity without changing layout.

The task says "Refresh this CSS visually. Keep ALL selectors and layout exactly as-is. Only change colors, shadows, radius, transitions, gradients."

Since the original has no colors/shadows/radius to change, I should add them to achieve the target style. The instruction says "Refresh the visual identity WITHOUT changing layout structure or class names." Adding new visual properties is a valid way to do that.

But wait — the self-check says:
"✓ Colors throughout the file replaced with fresh palette?"
"✓ Shadows redesigned (different offsets, colors)?"
"✓ Border-radius adjusted for new visual style?"

This implies the original file should have colors, shadows, radius. But it doesn't. So maybe I should add them.

Let me think about what makes sense:

The media query is for max-width 575.98px (small screens). The target style is editorial-magazine with sharp edges. I need to refresh visual identity.

I'll add visual declarations to each rule:

1. `.app-hero-section .row .col-lg-7` — text-align: center. I can add color, maybe a subtle border-bottom or something? But careful — this is a column in a hero section. I could add a color or text-shadow. Since it's a container (col-lg-7), adding background might be too much. But I can add something subtle.

Actually, maybe I should be careful about adding things that could affect layout. Background-color, color, box-shadow, border-radius, border (with border-width kept as-is... but border-width is protected? Let me check).

"border-color and border-style (NOT border-width)" — so I can set border-color and border-style but not border-width. But if the element has no border, setting border-style: solid without width does nothing. Actually, setting `border: 2px solid` would set border-width. Not allowed. I can only set border-color and border-style. But if I want a 2px border, I'd need to set border-width. Hmm.

The sharp-edges variant says "Strong borders (2-3px solid)" but the constraints say NOT border-width. So I can only use border-color and border-style on elements that already have border-width. If the original CSS has no borders, I can't add width. However, I could use box-shadow to simulate a border: `box-shadow: 0 0 0 2px #1a1a1a` — that's not changing border-width, it's box-shadow which is allowed.

The sharp-edges effect mentions "Hard offset shadows: 4px 4px 0px solid color" — but box-shadow doesn't have a "solid" keyword; the spread radius would be 0. So `box-shadow: 4px 4px 0px 0px #1a1a1a` or `4px 4px 0 #1a1a1a`.

Let me craft the output. I need to preserve:
- The media query `@media (max-width: 575.98px)` — the breakpoint condition is protected.
- The selectors exactly.
- The existing declarations (`text-align: center`, `font-size: 0.85rem`, `padding: var(--space-md) !important`).

Then add visual properties to each rule:

For `.app-hero-section .row .col-lg-7`:
- add `color: #1a1a1a;` (ink black)
- maybe `text-shadow` — but text-shadow on a column might only affect text. That could be okay. But it might make text look weird. Maybe skip text-shadow here.
- add `border-radius: 0;` — but this is a column, probably no visual border. Setting border-radius to 0 ensures sharp edges if there is a background. But adding border-radius where there's no background does nothing.
- Actually, I could add `box-shadow: 4px 4px 0 0 rgba(196, 69, 54, 0.15);` — a subtle hard offset shadow. But box-shadow on a column could create unexpected visual rectangles. Hmm.

Wait, maybe the better approach is to set CSS custom properties. The original CSS uses `var(--space-md)`. The target says I can change CSS custom properties (--color-*, --shadow-*) values. Since the file is a CSS file, maybe there are custom properties defined elsewhere. But in this snippet, `--space-md` is referenced but not defined. In conservative mode, I shouldn't assume I can redefine --space-md because it affects padding (layout). But I can define new custom properties.

Hmm, actually, re-reading the task: "Refresh the visual identity WITHOUT changing layout structure or class names." and the output is "ONLY the rewritten CSS, preserving ALL selectors and layout exactly."

The original CSS has no visual properties at all. So to refresh visual identity, I MUST add visual properties. The self-check expects colors, shadows, radius to be present.

Let me think about what's safest and most aligned:

Approach: Add visual declarations to each rule while keeping existing ones.

Rule 1: `.app-hero-section .row .col-lg-7`
- Existing: `text-align: center;`
- Add: `color: #1a1a1a;` — ink black text
- Add: `text-shadow: 0 1px 0 rgba(245, 241, 232, 0.5);` — subtle editorial texture? Actually maybe not.
- Add: `border-radius: 0;` — sharp edges
- Add: `box-shadow: none;` — no shadow

Hmm, but that doesn't really do much. Let me think about whether I should simulate a border with box-shadow.

Actually, maybe I'm overthinking. The instruction says "Make colors, shadows, and radius MORE distinct this round." Perhaps the previous attempt was too subtle. This time I should be more aggressive with visual changes — use a fresh palette and strong shadows.

Since it's a mobile media query (max-width 575.98px), the elements are likely stacked. Adding shadows and borders to article/card elements makes sense.

Let me design:

Rule 1: `.app-hero-section .row .col-lg-7` (hero column on mobile, centered text)
- Add `color: #1a1a1a;`
- Add `border-radius: 0;`
- Add `box-shadow: none;` — ensure no rounded shadow remain from other sources? Actually box-shadow none doesn't add anything.

Rule 2: `.app-hero-section .badge.bg-warning` (badge with warning background)
- Original has `font-size: 0.85rem`.
- The badge likely has a background color (bg-warning = Bootstrap warning yellow). I can override:
  - `background-color: #c44536;` (deep red accent)
  - `color: #f5f1e8;` (cream text)
  - `border-radius: 0;` (sharp edges)
  - `box-shadow: 3px 3px 0 0 #1a1a1a;` (hard offset hard shadow)
  - `transition: all 0.15s ease;` (snappy)

Rule 3: `.contact-channels-section article, .contact-quick-section .contact-card` (contact cards)
- Original has `padding: var(--space-md) !important;`
- Add:
  - `background-color: #f5f1e8;` (cream background)
  - `border: 2px solid #1a1a1a;` — wait, border-width not allowed! I can't set border: 2px solid because that includes border-width.
  
Hmm. The constraint is `border-color and border-style (NOT border-width)`. So if I write `border-style: solid; border-color: #1a1a1a;` without width, the border width might be 0 by default, so nothing shows. If the element already has a border-width from another rule, it would work. But in this media query, the original doesn't set border-width. I shouldn't rely on that.

Alternative: use box-shadow to create a border effect:
`box-shadow: 0 0 0 2px #1a1a1a, 4px 4px 0 0 #c44536;` — the first creates a 2px solid border-like ring (spread radius 2px, no blur), the second creates a hard offset shadow. But wait, box-shadow doesn't respect border-radius? Actually it does — box-shadow follows border-radius. So with border-radius: 0, the ring would be sharp.

Actually, `box-shadow: 0 0 0 2px #1a1a1a` creates a hard outline at the element's border-box. Combined with border-radius: 0, it looks like a 2px border. That's a common technique.

Alternatively, I can set `outline: 2px solid #1a1a1a` — but outline is listed as "outline styles (color, type)" — protected? Wait, let me check: "outline styles (color, type)" — this means I can change outline color and type. But outline-width is not mentioned. So I could add `outline: 2px solid`? That sets outline-width, which isn't explicitly listed. Hmm. The NEVER CHANGE list doesn't mention outline-width explicitly, but it says "outline styles (color, type)". This suggests I can change outline-color and outline-style, but not width. So `outline: solid` without width... again relies on default.

Better to use box-shadow for borders.

Let me craft rule 3:
```css
.contact-channels-section article,
.contact-quick-section .contact-card {
    padding: var(--space-md) !important;
    background-color: #f5f1e8;
    border-radius: 0;
    box-shadow: 0 0 0 2px #1a1a1a, 4px 4px 0 0 #c44536;
    transition: box-shadow 0.15s ease, transform 0.15s ease;
}
```

Wait — `transform` is not in the allowed properties list? Let me check. Transform is not explicitly listed under NEVER CHANGE, and it's not in the MUST CHANGE list either. The MUST CHANGE list includes colors, shadows, radius, gradients, transitions, filter, opacity, outline, border-color/style, caret-color, accent-color, custom properties. Transition timing/easing/duration can change, but what about adding transform? Hmm, transform is a visual/position property. The NEVER CHANGE list includes position but not transform. But to be safe, I should avoid transform since it could affect layout/positioning visually in an unexpected way. Actually, transform doesn't affect layout flow, but it's risky. Conservative mode says visual changes only — transform is visual, but it might break the "layout structure" perception. I'll avoid transform.

For transition, I can include `box-shadow` and `background-color` as transition properties. But `transition` property itself — is it in allowed? Yes, "transition timing, easing, duration" — so I can set transition. But adding transition triggers on hover? I don't have :hover selectors here. Still, transition can be defined for future hover states from other rules. But since the original CSS doesn't have a hover rule here, transition alone might not do anything. But it's fine to add it for consistency with the sharp-edges "snappy transitions" variant.

Actually, wait — maybe I should just add hover effects? No, I can't add selectors. The selectors must be preserved exactly. I can't add `:hover` pseudo-classes because the constraint says "Pseudo-classes (:hover, :focus, ::before, ::after)" — I can keep them but not add new ones? It says "Selectors: keep EXACTLY". So I cannot add new selectors or pseudo-classes. So no hover rules.

So transitions will be somewhat inert unless other rules already define transitions on these elements. But adding `transition` might still be part of a good refresh. Hmm.

Let me reconsider. The instructions say "Refresh the visual identity WITHOUT changing layout structure or class names." I think the safest and most compliant approach is:

1. Keep all existing declarations exactly.
2. Add new visual declarations (colors, box-shadow, border-radius, transition) that don't affect layout.

But I need to be careful: adding `background-color` to `.app-hero-section .row .col-lg-7` might create a visible block where there was none. Is that okay? It's a visual change. The task wants distinct visual changes. But it could look bad. Maybe I should not add backgrounds to columns, only to badge and cards.

Let me look at the target style again:
- Editorial neutrals: cream/beige backgrounds (#f5f1e8), ink black text (#1a1a1a)
- Single accent color: deep red #c44536 or olive #6b705c
- Hard offset shadows: 4px 4px 0px solid color
- Small or zero border-radius (0-4px)
- Strong borders (2-3px solid)
- Snappy transitions (0.15s)

So for hero section: maybe add `color: #1a1a1a` to text, and maybe `background-color: #f5f1e8` to the hero? But `.col-lg-7` is inside a row inside `.app-hero-section`. Adding background to a col could create visible block in hero. Eh.

Actually, since it's an editorial magazine style, cream background with ink text is the base. But the hero section probably already has styles. Since this media query only adjusts text-align and badge font-size, I should only make these elements fit the editorial palette:

- Badge: make it deep red background, cream text, sharp edges, hard shadow.
- Contact cards: cream background, ink border (via box-shadow), hard offset shadow in deep red, sharp edges.
- Hero column: set ink text color, maybe a subtle text-shadow or nothing.

Also, `bg-warning` is a Bootstrap class that sets background-color: #ffc107 (warning yellow). Overriding it in this media query with `background-color: #c44536` would change the badge to deep red. That's a strong visual change.

But wait — the selector `.app-hero-section .badge.bg-warning` — if I override background-color here, it only applies at max-width 575.98px. That's fine.

Let me also consider the `--space-md` variable — I shouldn't change its value since it's a spacing variable that affects layout. But I can add new custom properties like `--ed-color-accent` at the top? The snippet starts with `@media`, so I can't add custom properties outside the media query without adding new rules. I could add a `:root` or `@media` block with custom properties, but that adds selectors. The constraint says selectors must be preserved exactly — meaning I shouldn't add new selectors. Hmm, actually it says "No markdown fences, no explanations