/* ============================================================
   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
   ============================================================ */

/* =========================
   Conservative palette (fresh)
   ========================= */
:root{
    --color-primary: #0ea5e9;
    --color-primary-dark: #0284c7;
    --color-primary-darker: #0369a1;

    --color-accent: #7c3aed;
    --color-accent-dark: #6d28d9;

    --color-text: #0f172a;
    --color-text-muted: #475569;

    --color-bg: #f7f8ff;
    --color-bg-soft: #fffaf0; /* cream */
    --color-bg-muted: #eef2ff; /* soft cool */
    --color-border: rgba(2, 132, 199, 0.35);
    --color-border-soft: rgba(15, 23, 42, 0.14);
    --color-danger: #ef4444;

    --gradient-hero: linear-gradient(135deg, #0ea5e9 0%, #7c3aed 48%, #f97316 100%);
    --gradient-icon: linear-gradient(180deg, rgba(14,165,233,1) 0%, rgba(124,58,237,1) 100%);

    --shadow-sm: 0 10px 24px rgba(2, 132, 199, 0.14), 0 2px 8px rgba(2, 132, 199, 0.10);
    --shadow-md: 0 18px 55px rgba(124, 58, 237, 0.18), 0 6px 20px rgba(2, 132, 199, 0.14);
    --shadow-lg: 0 26px 70px rgba(2, 132, 199, 0.22), 0 10px 30px rgba(124, 58, 237, 0.16);
    --shadow-primary: 0 24px 65px rgba(124, 58, 237, 0.25), 0 12px 34px rgba(14, 165, 233, 0.18);

    --radius-md: 16px;

    --transition-fast: 0.42s cubic-bezier(.2,.9,.2,1);
    --transition-base: 0.52s cubic-bezier(.2,.9,.2,1);
    --transition-slow: 0.62s cubic-bezier(.2,.9,.2,1);
}

/* ============================================
   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 rgba(14, 165, 233, 0.45);
    border-image: linear-gradient(90deg, rgba(14,165,233,0.0) 0%, rgba(14,165,233,0.95) 20%, rgba(124,58,237,0.95) 70%, rgba(14,165,233,0.0) 100%) 1;
}

.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);
    padding: var(--space-sm) var(--space-md);
    background: radial-gradient(120% 120% at 0% 0%, rgba(124,58,237,0.10) 0%, rgba(255,250,240,1) 45%, rgba(14,165,233,0.08) 100%);
    border-radius: 0 18px 18px 0;
    margin-block: var(--space-md);
    color: #334155;
    font-style: italic;
    box-shadow: 0 18px 55px rgba(124, 58, 237, 0.10), 0 6px 18px rgba(14,165,233,0.10);
}

.post-content img {
    max-width: 100%;
    height: auto;
    border-radius: 18px;
    margin-block: var(--space-sm);
    box-shadow:
        0 26px 75px rgba(2, 132, 199, 0.20),
        0 12px 35px rgba(124, 58, 237, 0.16),
        0 2px 10px rgba(15, 23, 42, 0.10);
    border: 1px solid rgba(2, 132, 199, 0.14);
}

.post-content a {
    color: var(--color-primary);
    text-decoration: underline;
    transition: color 0.45s cubic-bezier(.2,.9,.2,1), text-shadow 0.45s cubic-bezier(.2,.9,.2,1);
}

.post-content a:hover {
    color: var(--color-primary-dark);
    text-shadow: 0 8px 20px rgba(2,132,199,0.20);
}

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

.post-content code {
    background: linear-gradient(180deg, rgba(238,242,255,1) 0%, rgba(255,250,240,1) 100%);
    padding: 2px 6px;
    border-radius: 7px;
    font-size: 0.9em;
    color: #dc2626;
    border: 1px solid rgba(239, 68, 68, 0.22);
    box-shadow: 0 10px 26px rgba(239, 68, 68, 0.08);
}

.post-content pre {
    background: linear-gradient(180deg, rgba(3,105,161,1) 0%, rgba(2,132,199,0.98) 45%, rgba(124,58,237,0.98) 100%);
    color: #fff;
    padding: var(--space-md);
    border-radius: 18px;
    overflow-x: auto;
    margin-block: var(--space-md);
    box-shadow:
        0 30px 85px rgba(124, 58, 237, 0.22),
        0 14px 40px rgba(2, 132, 199, 0.20),
        inset 0 1px 0 rgba(255,255,255,0.20);
    border: 1px solid rgba(255,255,255,0.14);
}

.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 rgba(15, 23, 42, 0.14);
    text-align: start;
}

.post-content table th {
    background: linear-gradient(180deg, rgba(238,242,255,1) 0%, rgba(255,250,240,1) 100%);
    font-weight: 700;
    color: #0f172a;
}

/* TOC */
.toc-box {
    border-inline-start: 3px solid rgba(14,165,233,0.95);
    background: linear-gradient(90deg, rgba(14,165,233,0.10) 0%, rgba(255,250,240,0) 100%);
    padding-inline-start: 10px;
}

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

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

.toc-box ol li a {
    transition: color 0.45s cubic-bezier(.2,.9,.2,1), padding-inline-start 0.45s cubic-bezier(.2,.9,.2,1), text-shadow 0.45s cubic-bezier(.2,.9,.2,1);
}

.toc-box ol li a:hover {
    color: var(--color-primary-dark);
    text-decoration: underline !important;
    padding-inline-start: 4px;
    text-shadow: 0 10px 24px rgba(2,132,199,0.18);
}

/* Tags */
.post-tags .badge {
    background: rgba(238,242,255,1) !important;
    color: #3b4b63 !important;
    padding: 6px 12px;
    font-weight: 600;
    transition: transform var(--transition-fast), background 0.45s cubic-bezier(.2,.9,.2,1), color 0.45s cubic-bezier(.2,.9,.2,1), box-shadow 0.45s cubic-bezier(.2,.9,.2,1);
    border: 1px solid rgba(2,132,199,0.10);
    border-radius: 999px;
}

.post-tags .badge:hover {
    background: linear-gradient(135deg, rgba(14,165,233,1) 0%, rgba(124,58,237,1) 100%) !important;
    color: rgba(255,255,255,0.98) !important;
    transform: translateY(-1px);
    box-shadow: 0 22px 60px rgba(124,58,237,0.22), 0 14px 40px rgba(14,165,233,0.18);
}

/* 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: linear-gradient(90deg, #ffffff 0%, rgba(255,250,240,1) 32%, rgba(238,242,255,1) 62%, rgba(255,255,255,1) 100%);
    color: #0b1220;
    position: relative;
    overflow: hidden;
}

.app-hero-section::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(1400px 520px at 20% 20%, rgba(14,165,233,0.35) 0%, rgba(14,165,233,0.0) 52%),
        radial-gradient(1100px 460px at 90% 25%, rgba(124,58,237,0.30) 0%, rgba(124,58,237,0.0) 55%),
        linear-gradient(180deg, rgba(3,105,161,0.10) 0%, rgba(255,255,255,0.0) 60%, rgba(124,58,237,0.08) 100%);
    z-index: 0;
    backdrop-filter: blur(6px);
    opacity: 1;
}

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

.app-hero-section h1 {
    font-size: clamp(2rem, 4vw, 3rem);
    line-height: 1.2;
    text-shadow: 0 18px 55px rgba(124,58,237,0.18), 0 10px 30px rgba(14,165,233,0.16);
}

.app-hero-section img {
    transition: transform 0.62s cubic-bezier(.2,.9,.2,1), filter 0.62s cubic-bezier(.2,.9,.2,1);
    filter: drop-shadow(0 24px 55px rgba(2, 132, 199, 0.30)) drop-shadow(0 16px 34px rgba(124, 58, 237, 0.22));
    border-radius: 22px;
}

.app-hero-section img:hover {
    transform: translateY(-10px) rotate(-0.6deg);
    filter: drop-shadow(0 32px 85px rgba(124, 58, 237, 0.28)) drop-shadow(0 22px 55px rgba(2, 132, 199, 0.26));
}

.text-white-50 {
    color: rgba(255, 255, 255, 0.70) !important;
    text-shadow: 0 18px 50px rgba(2,132,199,0.35);
}

/* ============================================
   3. App QR (AppQrSection)
   ============================================ */
.app-qr-section {
    background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(255,250,240,1) 40%, rgba(238,242,255,1) 100%);
}

.qr-card {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), border-color 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1);
    border: 2px solid transparent;
    border-radius: 22px;
    background: linear-gradient(180deg, rgba(255,255,255,0.95) 0%, rgba(255,250,240,0.98) 100%);
    box-shadow:
        0 14px 40px rgba(2,132,199,0.08),
        0 6px 18px rgba(124,58,237,0.08),
        inset 0 1px 0 rgba(255,255,255,0.70);
}

.qr-card:hover {
    transform: scale(1.03) translateY(-2px);
    border-color: rgba(124, 58, 237, 0.75);
    box-shadow:
        0 30px 90px rgba(124, 58, 237, 0.22),
        0 18px 55px rgba(2, 132, 199, 0.18),
        inset 0 1px 0 rgba(255,255,255,0.65);
}

.qr-card img {
    image-rendering: pixelated;
    image-rendering: -moz-crisp-edges;
    image-rendering: crisp-edges;
    border-radius: 16px;
}

/* ============================================
   4. App Install Steps (AppInstallSection)
   ============================================ */
.app-install-section {
    background: linear-gradient(90deg, rgba(255,250,240,1) 0%, rgba(238,242,255,1) 55%, rgba(255,255,255,1) 100%);
}

.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: 800;
    border-radius: 999px !important;
    background: linear-gradient(135deg, rgba(14,165,233,1) 0%, rgba(124,58,237,1) 100%);
    color: rgba(255,255,255,0.98);
    box-shadow: 0 18px 55px rgba(124,58,237,0.22), 0 10px 30px rgba(14,165,233,0.18);
    border: 1px solid rgba(255,255,255,0.24);
}

.app-install-section .bg-white {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1);
    position: relative;
    overflow: hidden;
    border-radius: 22px;
    background: radial-gradient(120% 120% at 0% 0%, rgba(14,165,233,0.10) 0%, rgba(255,255,255,0.95) 45%, rgba(124,58,237,0.08) 100%);
    border: 1px solid rgba(2, 132, 199, 0.12);
    box-shadow:
        0 16px 45px rgba(2,132,199,0.08),
        0 7px 20px rgba(124,58,237,0.08),
        inset 0 1px 0 rgba(255,255,255,0.75);
}

.app-install-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow:
        0 28px 85px rgba(2, 132, 199, 0.20),
        0 16px 45px rgba(124, 58, 237, 0.18),
        inset 0 1px 0 rgba(255,255,255,0.70);
}

.app-install-section .bg-white::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 100%;
    background: linear-gradient(180deg, rgba(14,165,233,1) 0%, rgba(124,58,237,1) 100%);
    transform: scaleY(0);
    transform-origin: top;
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1);
    opacity: 0.95;
}

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

/* ============================================
   5. App Showcase (AppShowcaseSection)
   ============================================ */
.app-showcase-section {
    background: linear-gradient(180deg, rgba(15,23,42,0.96) 0%, rgba(2,132,199,0.10) 55%, rgba(255,250,240,1) 100%);
}

.app-showcase-section img {
    transition: transform 0.62s cubic-bezier(.2,.9,.2,1), filter 0.62s cubic-bezier(.2,.9,.2,1);
    filter: drop-shadow(0 18px 45px rgba(0,0,0,0.35)) drop-shadow(0 14px 30px rgba(124,58,237,0.22));
    border-radius: 20px;
}

.app-showcase-section img:hover {
    transform: translateY(-5px) rotate(-1deg);
    filter: drop-shadow(0 26px 75px rgba(0,0,0,0.38)) drop-shadow(0 18px 45px rgba(124,58,237,0.26));
}

.app-showcase-section .bg-white {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), border-color 0.52s cubic-bezier(.2,.9,.2,1);
    border-inline-start: 3px solid transparent;
    border-radius: 22px;
    border: 1px solid rgba(255,255,255,0.18);
    background: linear-gradient(180deg, rgba(255,255,255,0.92) 0%, rgba(255,250,240,0.95) 100%);
    box-shadow:
        0 16px 45px rgba(0,0,0,0.18),
        0 8px 22px rgba(2,132,199,0.12),
        inset 0 1px 0 rgba(255,255,255,0.55);
}

.app-showcase-section .bg-white:hover {
    border-inline-start-color: rgba(14,165,233,0.95);
    transform: translateX(5px);
    box-shadow:
        0 32px 95px rgba(0,0,0,0.25),
        0 18px 55px rgba(124,58,237,0.20),
        inset 0 1px 0 rgba(255,255,255,0.55);
}

/* ============================================
   6. Contact Sections
   ============================================ */
.contact-channels-section {
    background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(238,242,255,1) 55%, rgba(255,250,240,1) 100%);
}

.contact-channels-section article {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), border-color 0.52s cubic-bezier(.2,.9,.2,1);
    border: 1px solid rgba(148,163,184,0.32);
    border-radius: 22px;
    background: radial-gradient(120% 120% at 0% 0%, rgba(14,165,233,0.10) 0%, rgba(255,255,255,0.95) 45%, rgba(124,58,237,0.08) 100%);
    box-shadow:
        0 18px 55px rgba(2,132,199,0.10),
        0 8px 24px rgba(124,58,237,0.08),
        inset 0 1px 0 rgba(255,255,255,0.70);
}

.contact-channels-section article:hover {
    transform: translateY(-5px);
    box-shadow:
        0 35px 110px rgba(2, 132, 199, 0.16),
        0 18px 55px rgba(124, 58, 237, 0.16),
        inset 0 1px 0 rgba(255,255,255,0.65);
    border-color: rgba(14,165,233,0.55);
}

.contact-channels-section article ul li {
    transition: padding 0.42s cubic-bezier(.2,.9,.2,1), color 0.42s cubic-bezier(.2,.9,.2,1);
}

.contact-channels-section article ul li:hover {
    padding-inline-start: 4px;
    color: #0b3a53;
    text-shadow: 0 14px 40px rgba(14,165,233,0.12);
}

/* Contact Quick */
.contact-quick-section {
    background: linear-gradient(90deg, rgba(255,250,240,1) 0%, rgba(238,242,255,1) 60%, rgba(255,255,255,1) 100%);
}

.contact-quick-section .contact-card {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), border-color 0.52s cubic-bezier(.2,.9,.2,1);
    border-radius: 22px;
    border: 1px solid rgba(2,132,199,0.14);
    background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(255,250,240,0.96) 100%);
    box-shadow:
        0 18px 55px rgba(124,58,237,0.10),
        0 8px 24px rgba(2,132,199,0.10),
        inset 0 1px 0 rgba(255,255,255,0.70);
}

.contact-quick-section .contact-card:hover {
    transform: translateY(-5px);
    box-shadow:
        0 35px 110px rgba(124,58,237,0.18),
        0 18px 55px rgba(2,132,199,0.16),
        inset 0 1px 0 rgba(255,255,255,0.65);
}

.contact-quick-section .contact-card i {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), color 0.52s cubic-bezier(.2,.9,.2,1), filter 0.52s cubic-bezier(.2,.9,.2,1);
    color: rgba(14,165,233,0.95);
    filter: drop-shadow(0 14px 35px rgba(14,165,233,0.18));
}

.contact-quick-section .contact-card:hover i {
    transform: scale(1.1) rotate(-5deg);
    color: rgba(124,58,237,0.98);
    filter: drop-shadow(0 20px 60px rgba(124,58,237,0.22));
}

/* Contact Form */
.contact-form-section {
    background: linear-gradient(180deg, rgba(238,242,255,1) 0%, rgba(255,250,240,1) 45%, rgba(255,255,255,1) 100%);
}

.contact-form-section .form-control,
.contact-form-section .form-select {
    border: 2px solid rgba(148,163,184,0.30);
    transition: border-color 0.45s cubic-bezier(.2,.9,.2,1), box-shadow 0.45s cubic-bezier(.2,.9,.2,1), background 0.45s cubic-bezier(.2,.9,.2,1);
    border-radius: 14px;
    background: linear-gradient(180deg, rgba(255,255,255,0.96) 0%, rgba(255,250,240,0.96) 100%);
}

.contact-form-section .form-control:focus,
.contact-form-section .form-select:focus {
    border-color: rgba(14,165,233,0.92);
    box-shadow:
        0 0 0 0.2rem rgba(14, 165, 233, 0.12),
        0 18px 55px rgba(14,165,233,0.16);
    background: linear-gradient(180deg, rgba(255,255,255,1) 0%, rgba(238,242,255,1) 100%);
}

.contact-form-section button[type="submit"] {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), filter 0.52s cubic-bezier(.2,.9,.2,1);
    border-radius: 16px;
}

.contact-form-section button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
    filter: saturate(1.06);
}

/* Contact Commitments */
.contact-commitments-section {
    background: linear-gradient(90deg, rgba(255,250,240,1) 0%, rgba(255,255,255,1) 40%, rgba(238,242,255,1) 100%);
}

.contact-commitments-section .bg-white {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1);
    text-align: center;
    border-radius: 22px;
    border: 1px solid rgba(2,132,199,0.12);
    background: radial-gradient(140% 120% at 50% 0%, rgba(14,165,233,0.12) 0%, rgba(255,255,255,0.96) 45%, rgba(124,58,237,0.10) 100%);
    box-shadow:
        0 18px 55px rgba(2,132,199,0.10),
        0 8px 24px rgba(124,58,237,0.08),
        inset 0 1px 0 rgba(255,255,255,0.70);
}

.contact-commitments-section .bg-white:hover {
    transform: translateY(-5px);
    box-shadow:
        0 35px 110px rgba(124,58,237,0.18),
        0 18px 55px rgba(2,132,199,0.16),
        inset 0 1px 0 rgba(255,255,255,0.65);
}

.contact-commitments-section .bg-white i {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), color 0.52s cubic-bezier(.2,.9,.2,1);
    color: rgba(124,58,237,0.95);
}

.contact-commitments-section .bg-white:hover i {
    transform: scale(1.15);
    color: rgba(14,165,233,0.98);
}

/* ============================================
   7. Login / Signup Forms
   ============================================ */
main:has(> .container > .bg-white > form) .input-group-text {
    background-color: rgba(238,242,255,1);
    border-color: rgba(148,163,184,0.28);
    border-inline-end: none;
    color: #334155;
    border-radius: 14px 0 0 14px;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.65);
}

main:has(> .container > .bg-white > form) .input-group .form-control {
    border-inline-start: none;
    border-radius: 0 14px 14px 0;
}

main:has(> .container > .bg-white > form) .input-group:focus-within .input-group-text {
    border-color: rgba(14,165,233,0.85);
    background-color: rgba(239,246,255,1);
    box-shadow: 0 18px 55px rgba(14,165,233,0.14), inset 0 1px 0 rgba(255,255,255,0.65);
}

main:has(> .container > .bg-white > form) .input-group:focus-within .form-control {
    border-color: rgba(14,165,233,0.85);
    box-shadow: 0 0 0 0.22rem rgba(14, 165, 233, 0.10);
}

main:has(> .container > .bg-white > form) .form-check-input:checked {
    background-color: rgba(14,165,233,0.95);
    border-color: rgba(14,165,233,0.95);
    box-shadow: 0 18px 55px rgba(14,165,233,0.18);
}

main:has(> .container > .bg-white > form) button[type="submit"] {
    transition: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), filter 0.52s cubic-bezier(.2,.9,.2,1);
    font-weight: 600;
    border-radius: 16px;
}

main:has(> .container > .bg-white > form) button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-primary);
    filter: saturate(1.06);
}

/* ============================================
   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: transform 0.52s cubic-bezier(.2,.9,.2,1), box-shadow 0.52s cubic-bezier(.2,.9,.2,1), background 0.52s cubic-bezier(.2,.9,.2,1), border-color 0.52s cubic-bezier(.2,.9,.2,1), color 0.52s cubic-bezier(.2,.9,.2,1);
}

.hero-buttons .btn:hover {
    transform: translateY(-3px);
    box-shadow:
        0 35px 110px rgba(124,58,237,0.20),
        0 18px 55px rgba(14,165,233,0.16);
}

.hero-buttons .btn-warning {
    background-color: var(--color-accent);
    border-color: rgba(124,58,237,0.70);
    color: #05152a;
    font-weight: 650;
    border-radius: 14px;
    box-shadow: 0 22px 60px rgba(124,58,237,0.20);
}

.hero-buttons .btn-warning:hover {
    background-color: var(--color-accent-dark);
    border-color: rgba(109,40,217,0.85);
    box-shadow: 0 30px 90px rgba(109,40,217,0.22);
}

.hero-buttons .btn-outline-light:hover {
    background-color: rgba(255, 255, 255, 0.18);
    color: #fff;
    text-shadow: 0 18px 55px rgba(255,255,255,0.15);
}

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

::-webkit-scrollbar-track {
    background: rgba(238,242,255,1);
    border: 1px solid rgba(148,163,184,0.18);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, rgba(14,165,233,1) 0%, rgba(124,58,237,1) 100%);
    border-radius: 7px;
    border: 2px solid rgba(255,255,255,0.70);
    box-shadow: 0 12px 35px rgba(124,58,237,0.18);
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(180deg, rgba(2,132,199,1) 0%, rgba(124,58,237,1) 100%);
}

/* Firefox */
* {
    scrollbar-width: thin;
    scrollbar-color: rgba(14,165,233,1) rgba(238,242,255,1);
}

*:focus{
    caret-color: rgba(14,165,233,1);
    outline-color: rgba(14,165,233,0.75);
}

/* ============================================
   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 0.62s cubic-bezier(.2,.9,.2,1);
}

.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: #1a1206;
        background: linear-gradient(135deg, #ffd46a 0%, #ffe8a8 35%, #ffbf4a 100%);
        border-style: solid;
        border-color: rgba(26, 18, 6, 0.18);
        border-radius: 999px;
        box-shadow:
            0 10px 30px rgba(0, 0, 0, 0.18),
            0 2px 0 rgba(255, 255, 255, 0.55) inset,
            0 -2px 10px rgba(255, 203, 92, 0.35) inset;
        transition: background 0.55s cubic-bezier(0.22, 1, 0.36, 1), box-shadow 0.55s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.55s cubic-bezier(0.22, 1, 0.36, 1), color 0.55s cubic-bezier(0.22, 1, 0.36, 1);
        text-shadow: 0 1px 0 rgba(255, 255, 255, 0.45);
    }

    .contact-channels-section article,
    .contact-quick-section .contact-card {
        padding: var(--space-md) !important;
        border-radius: 18px;
        background:
            linear-gradient(180deg, rgba(255, 255, 255, 0.92) 0%, rgba(255, 250, 231, 0.78) 55%, rgba(255, 255, 255, 0.92) 100%);
        border-style: solid;
        border-color: rgba(30, 22, 10, 0.12);
        box-shadow:
            0 18px 50px rgba(10, 8, 4, 0.18),
            0 6px 18px rgba(10, 8, 4, 0.10),
            0 1px 0 rgba(255, 255, 255, 0.8) inset,
            0 -1px 0 rgba(255, 214, 111, 0.35) inset;
        transition: box-shadow 0.55s cubic-bezier(0.22, 1, 0.36, 1), border-color 0.55s cubic-bezier(0.22, 1, 0.36, 1), background 0.55s cubic-bezier(0.22, 1, 0.36, 1), transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
        backdrop-filter: blur(10px) saturate(110%);
        -webkit-backdrop-filter: blur(10px) saturate(110%);
        caret-color: #5a3a00;
        accent-color: #b56a00;
        opacity: 1;
    }
}