:root {
  --color-cream: #f5f1e8;
  --color-ink: #1a1a1a;
  --color-accent-red: #c44536;
  --color-accent-red-dark: #a33a2e;
  --color-accent-red-light: #d96a5a;
  --color-olive: #6b705c;
  --color-olive-dark: #4e5342;
  --color-olive-light: #8f947e;
  --color-warm-gray: #b8b0a0;
  --color-warm-gray-light: #d4cfc5;
  --color-warm-gray-lighter: #e2ddd4;
  --color-warm-gray-lightest: #f0ece4;
  --color-border-warm: #d4cfc5;
  --color-bg-card: #faf8f4;
  --color-text-muted-warm: #7a7265;
  --color-text-soft: #5a5247;
  --shadow-airy-sm: 0 4px 12px rgba(26, 26, 26, 0.04), 0 1px 3px rgba(26, 26, 26, 0.06);
  --shadow-airy-md: 0 8px 24px rgba(26, 26, 26, 0.06), 0 3px 8px rgba(26, 26, 26, 0.08);
  --shadow-airy-lg: 0 16px 48px rgba(26, 26, 26, 0.08), 0 6px 16px rgba(26, 26, 26, 0.1);
  --shadow-airy-xl: 0 24px 64px rgba(26, 26, 26, 0.1), 0 10px 24px rgba(26, 26, 26, 0.12);
  --shadow-airy-primary: 0 8px 24px rgba(196, 53, 54, 0.2), 0 3px 8px rgba(196, 53, 54, 0.15);
  --radius-airy-sm: 12px;
  --radius-airy-md: 20px;
  --radius-airy-lg: 28px;
  --radius-airy-xl: 36px;
  --transition-airy-fast: 0.25s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-airy-base: 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition-airy-slow: 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
  --gradient-hero-editorial: linear-gradient(135deg, #2d2a24 0%, #4a443a 50%, #6b705c 100%);
  --gradient-icon-editorial: linear-gradient(135deg, #c44536, #d96a5a);
}

/* ============================================================
   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-accent-red);
}

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

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

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

.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-accent-red);
    padding: var(--space-sm) var(--space-md);
    background: var(--color-bg-card);
    border-radius: 0 var(--radius-airy-md) var(--radius-airy-md) 0;
    margin-block: var(--space-md);
    color: var(--color-text-muted-warm);
    font-style: italic;
}

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

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

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

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

.post-content code {
    background: var(--color-warm-gray-lightest);
    padding: 2px 6px;
    border-radius: 8px;
    font-size: 0.9em;
    color: var(--color-accent-red);
}

.post-content pre {
    background: var(--color-ink);
    color: var(--color-cream);
    padding: var(--space-md);
    border-radius: var(--radius-airy-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-warm);
    text-align: start;
}

.post-content table th {
    background: var(--color-warm-gray-lightest);
    font-weight: 600;
}

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

.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-airy-fast);
}

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

/* Tags */
.post-tags .badge {
    background: var(--color-warm-gray-lightest) !important;
    color: var(--color-text-soft) !important;
    padding: 6px 12px;
    font-weight: 500;
    transition: all var(--transition-airy-fast);
}

.post-tags .badge:hover {
    background: var(--color-accent-red) !important;
    color: var(--color-cream) !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-editorial);
    color: var(--color-cream);
    position: relative;
    overflow: hidden;
}

.app-hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.25);
    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-airy-slow);
    filter: drop-shadow(0 24px 48px rgba(0, 0, 0, 0.35));
}

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

.text-white-50 {
    color: rgba(245, 241, 232, 0.65) !important;
}

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

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

.qr-card:hover {
    transform: scale(1.03);
    border-color: var(--color-accent-red);
    box-shadow: 0 20px 48px rgba(26, 26, 26, 0.12);
}

.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-cream);
}

.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-airy-base);
    position: relative;
    overflow: hidden;
}

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

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

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

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

.app-showcase-section img {
    transition: transform var(--transition-airy-slow);
    filter: drop-shadow(0 20px 40px rgba(26, 26, 26, 0.12));
}

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

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

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

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

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

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

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

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

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

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

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

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

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

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

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

.contact-form-section .form-control:focus,
.contact-form-section .form-select:focus {
    border-color: var(--color-accent-red);
    box-shadow: 0 0 0 0.2rem rgba(196, 53, 54, 0.1);
}

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

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

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

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

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

.contact-commitments-section .bg-white i {
    transition: transform var(--transition-airy-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-warm-gray-lightest);
    border-color: var(--color-border-warm);
    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-accent-red);
    background-color: #fef6f5;
}

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

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

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

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

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

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

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

.hero-buttons .btn-outline-light:hover {
    background-color: rgba(245, 241, 232, 0.15);
    color: var(--color-cream);
}

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

::-webkit-scrollbar-track {
    background: var(--color-warm-gray-lightest);
}

::-webkit-scrollbar-thumb {
    background: var(--color-warm-gray);
    border-radius: 12px;
}

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

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--color-warm-gray) var(--color-warm-gray-lightest);
}

/* ============================================
   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: var(--color-cream) !important;
        color: var(--color-ink) !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: var(--color-ink) !important;
    }

    a[href^="http"]::after {
        content: " (" attr(href) ")";
        font-size: 9pt;
        color: var(--color-text-muted-warm);
    }

    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: var(--color-ink) !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;
    }
}

@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;
        color: #5c3a2e;
        background: linear-gradient(135deg, #e8d5b7, #d4b896);
        border: 1px solid #c4a882;
        box-shadow: 0 4px 12px rgba(107, 112, 92, 0.15);
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
        background: #f5f1e8;
        border: 1px solid #e0d8c8;
        border-radius: 20px;
        box-shadow: 0 8px 24px rgba(26, 26, 26, 0.06), 0 2px 6px rgba(26, 26, 26, 0.04);
        transition: all 0.35s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    }

    .contact-channels-section article:hover,
    .contact-quick-section .contact-card:hover {
        border-color: #6b705c;
        box-shadow: 0 12px 32px rgba(107, 112, 92, 0.12), 0 4px 12px rgba(26, 26, 26, 0.06);
        transform: translateY(-4px);
    }
}