/* ============================================
   C1 Mouse Website - Design System & Styles
   ============================================ */

/* === CSS Custom Properties === */
:root {
    /* Colors */
    --bg-primary: #0a0e1a;
    --bg-secondary: #0f1428;
    --bg-card: rgba(255, 255, 255, 0.04);
    --bg-card-hover: rgba(255, 255, 255, 0.08);
    --bg-glass: rgba(255, 255, 255, 0.06);
    --border-glass: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: rgba(255, 255, 255, 0.7);
    --text-muted: rgba(255, 255, 255, 0.45);
    --accent-blue: #00D4FF;
    --accent-purple: #7B61FF;
    --accent-pink: #FF6B9D;
    --gradient-primary: linear-gradient(135deg, #00D4FF, #7B61FF);
    --gradient-hero: linear-gradient(160deg, #0a0e1a 0%, #131842 40%, #1a1045 70%, #0a0e1a 100%);
    --gradient-section: linear-gradient(180deg, transparent, rgba(123, 97, 255, 0.03), transparent);

    /* Typography */
    --font-heading: 'Outfit', sans-serif;
    --font-body: 'Inter', sans-serif;

    /* Spacing */
    --section-padding: 100px 0;
    --container-padding: 0 24px;
    --border-radius: 16px;
    --border-radius-sm: 8px;
    --border-radius-lg: 24px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === Reset & Base === */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--accent-blue);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--accent-purple);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--container-padding);
}

/* === Gradient Text === */
.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* === Section Header === */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    padding: 6px 18px;
    border-radius: 50px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--accent-blue);
    margin-bottom: 16px;
    letter-spacing: 0.5px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

/* === Animations === */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: all var(--transition-medium);
    background: transparent;
}

.navbar.scrolled {
    background: rgba(10, 14, 26, 0.92);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-glass);
    padding: 10px 0;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    color: var(--text-primary);
}

.logo-icon {
    font-size: 1.6rem;
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
}

.logo-accent {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 8px;
    align-items: center;
}

.nav-link {
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: var(--border-radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--bg-glass);
}

.nav-cta {
    background: var(--gradient-primary) !important;
    color: var(--text-primary) !important;
    -webkit-text-fill-color: white;
    padding: 8px 20px !important;
    border-radius: 50px !important;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: all var(--transition-medium);
}

/* ============================================
   SUPPORT HERO SECTION
   ============================================ */
.support-hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    background: var(--gradient-hero);
    overflow: hidden;
    padding: 100px 0 80px;
}

.support-hero::before {
    content: '';
    position: absolute;
    top: 15%;
    left: -10%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, rgba(0, 212, 255, 0.08), transparent 70%);
    border-radius: 50%;
    animation: float-glow 8s ease-in-out infinite;
}

.support-hero::after {
    content: '';
    position: absolute;
    bottom: 10%;
    right: -5%;
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, rgba(123, 97, 255, 0.06), transparent 70%);
    border-radius: 50%;
    animation: float-glow 10s ease-in-out infinite reverse;
}

@keyframes float-glow {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(30px, -30px) scale(1.1); }
}

.support-hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-badge {
    display: inline-block;
    padding: 8px 20px;
    border-radius: 50px;
    background: var(--bg-glass);
    border: 1px solid var(--border-glass);
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--accent-blue);
    margin-bottom: 24px;
    animation: pulse-badge 3s ease-in-out infinite;
}

@keyframes pulse-badge {
    0%, 100% { box-shadow: 0 0 0 0 rgba(0, 212, 255, 0.2); }
    50% { box-shadow: 0 0 20px 5px rgba(0, 212, 255, 0.1); }
}

.hero-title {
    font-family: var(--font-body);
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 700;
    line-height: 1.15;
    margin-bottom: 20px;
    letter-spacing: -0.5px;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin-bottom: 32px;
    line-height: 1.8;
}

/* Quick Links */
.support-quick-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.support-link {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 14px 20px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-weight: 500;
    transition: all var(--transition-medium);
    text-decoration: none;
}

.support-link:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateX(6px);
    color: var(--accent-blue);
}

.support-link-icon {
    font-size: 1.3rem;
}

/* QR Card in Hero */
.qr-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    padding: 36px 28px;
    text-align: center;
    backdrop-filter: blur(10px);
    overflow: hidden;
}

.qr-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: conic-gradient(
        from 0deg,
        transparent,
        rgba(0, 212, 255, 0.05),
        transparent,
        rgba(123, 97, 255, 0.05),
        transparent
    );
    animation: spin-glow 10s linear infinite;
}

@keyframes spin-glow {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.qr-header {
    position: relative;
    z-index: 2;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
}

.qr-header-icon {
    font-size: 1.4rem;
}

.qr-code-container {
    position: relative;
    z-index: 2;
    display: flex;
    justify-content: center;
    margin-bottom: 16px;
    padding: 16px;
    background: #fff;
    border-radius: var(--border-radius);
    width: fit-content;
    margin-left: auto;
    margin-right: auto;
}

.qr-label {
    position: relative;
    z-index: 2;
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 6px;
}

.qr-phone {
    position: relative;
    z-index: 2;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.qr-phone span {
    color: var(--accent-blue);
    font-weight: 600;
}

.qr-divider {
    position: relative;
    z-index: 2;
    height: 1px;
    background: var(--border-glass);
    margin: 20px 0;
}

.support-contact-row {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.support-contact-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.support-contact-item a {
    color: var(--accent-blue);
    font-weight: 500;
}

.support-contact-item.hotline {
    text-decoration: none;
    padding: 10px 14px;
    background: rgba(0, 212, 255, 0.05);
    border: 1px solid rgba(0, 212, 255, 0.12);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-medium);
}

.support-contact-item.hotline:hover {
    background: rgba(0, 212, 255, 0.1);
    border-color: rgba(0, 212, 255, 0.25);
    color: var(--text-primary);
}

.support-contact-item.hotline strong {
    color: var(--accent-blue);
    font-size: 0.95rem;
}

/* Zalo mobile button - hidden on desktop */
.zalo-mobile-btn {
    display: none;
}

/* ============================================
   PRODUCT OVERVIEW SECTION
   ============================================ */
.product {
    padding: var(--section-padding);
    background: var(--gradient-section);
}

.product-overview {
    display: grid;
    grid-template-columns: 1fr 1.2fr;
    gap: 48px;
    align-items: start;
}

.product-image {
    position: relative;
}

.product-image img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    border: 1px solid var(--border-glass);
}

.specs-mini-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 32px;
}

.spec-mini {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-medium);
}

.spec-mini:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 212, 255, 0.15);
}

.spec-mini-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
}

.spec-mini div {
    display: flex;
    flex-direction: column;
}

.spec-mini strong {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.spec-mini span {
    font-size: 0.78rem;
    color: var(--text-muted);
}

.product-features-list {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    padding: 28px;
}

.product-features-list h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.product-features-list ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.product-features-list li {
    font-size: 0.92rem;
    color: var(--text-secondary);
    padding: 8px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    line-height: 1.6;
}

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

/* ============================================
   FEATURE SHOWCASE SECTION
   ============================================ */
.showcase {
    padding: var(--section-padding);
    background: linear-gradient(180deg, rgba(10, 14, 26, 0.95) 0%, rgba(15, 20, 40, 1) 100%);
}

.showcase-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 64px;
}

.showcase-item-reverse {
    direction: rtl;
}

.showcase-item-reverse > * {
    direction: ltr;
}

.showcase-image {
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: transform var(--transition-medium);
}

.showcase-image:hover {
    transform: scale(1.02);
}

.showcase-image img {
    width: 100%;
    height: auto;
    display: block;
}

.showcase-text h3 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-primary);
    line-height: 1.3;
}

.showcase-text p {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
}

.showcase-text strong {
    color: var(--accent-blue);
    font-weight: 600;
}

.showcase-banner {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    margin-top: 32px;
}

.showcase-banner img {
    width: 100%;
    height: auto;
    display: block;
}

.showcase-banner-text {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    padding: 32px;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.85));
    color: #fff;
}

.showcase-banner-text h3 {
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.showcase-banner-text p {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.85);
    line-height: 1.6;
}

/* ============================================
   COLOR GALLERY SECTION
   ============================================ */
.colors {
    padding: var(--section-padding);
    background: var(--gradient-section);
}

.color-gallery {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.color-card {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-medium);
    cursor: pointer;
}

.color-card:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 212, 255, 0.25);
    transform: translateY(-8px) scale(1.02);
    box-shadow: 0 16px 50px rgba(0, 0, 0, 0.4);
}

.color-image {
    aspect-ratio: 1;
    overflow: hidden;
    background: rgba(255, 255, 255, 0.02);
}

.color-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform var(--transition-slow);
}

.color-card:hover .color-image img {
    transform: scale(1.08);
}

.color-label {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 12px;
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.3px;
}

.color-dot {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    border: 2px solid rgba(255, 255, 255, 0.2);
    flex-shrink: 0;
}

.color-group-photo {
    margin-top: 40px;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    border: 1px solid var(--border-glass);
    text-align: center;
    background: var(--bg-card);
}

.color-group-photo img {
    width: 100%;
    max-width: 800px;
    height: auto;
    display: block;
    margin: 0 auto;
}

.color-group-photo p {
    padding: 16px;
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 500;
}

/* ============================================
   GUIDE SECTION
   ============================================ */
.guide {
    padding: var(--section-padding);
    background: var(--gradient-section);
}

/* Large hero image at top */
.guide-image-hero {
    max-width: 900px;
    margin: 0 auto 48px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.3);
    transition: all var(--transition-medium);
}

.guide-image-hero:hover {
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.45);
    border-color: rgba(0, 212, 255, 0.2);
}

.guide-image-hero img {
    width: 100%;
    background: #fff;
    padding: 28px 32px;
    display: block;
}

.guide-image-caption {
    padding: 16px 20px;
    font-size: 0.95rem;
    color: var(--text-secondary);
    text-align: center;
    font-weight: 500;
    background: rgba(0, 0, 0, 0.15);
    border-top: 1px solid var(--border-glass);
}

/* 3 steps in a row */
.guide-steps-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 48px;
}

.guide-step {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 20px;
    padding: 32px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    transition: all var(--transition-medium);
}

.guide-step:hover {
    background: var(--bg-card-hover);
    border-color: rgba(0, 212, 255, 0.2);
    transform: translateY(-4px);
}

.step-number {
    width: 52px;
    height: 52px;
    min-width: 52px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--gradient-primary);
    font-family: var(--font-heading);
    font-size: 1.4rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 4px 20px rgba(0, 212, 255, 0.25);
}

.step-content h3 {
    font-family: var(--font-heading);
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.step-content p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    line-height: 1.7;
}


.guide-tips {
    display: flex;
    flex-direction: column;
    gap: 16px;
    max-width: 800px;
    margin: 0 auto;
}

.tip-card {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 20px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    color: var(--text-secondary);
    transition: all var(--transition-medium);
}

.tip-card:hover {
    background: var(--bg-card-hover);
}

.tip-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.tip-card strong {
    color: var(--text-primary);
}

/* ============================================
   FAQ SECTION
   ============================================ */
.faq {
    padding: var(--section-padding);
}

.faq-list {
    max-width: 750px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-glass);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: all var(--transition-medium);
}

.faq-item:hover {
    border-color: rgba(0, 212, 255, 0.15);
}

.faq-item.active {
    border-color: rgba(0, 212, 255, 0.25);
    background: var(--bg-card-hover);
}

.faq-question {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 20px 24px;
    background: none;
    border: none;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-align: left;
    transition: color var(--transition-fast);
}

.faq-question:hover {
    color: var(--accent-blue);
}

.faq-chevron {
    font-size: 1.2rem;
    color: var(--text-muted);
    transition: transform var(--transition-medium);
    flex-shrink: 0;
}

.faq-item.active .faq-chevron {
    transform: rotate(180deg);
    color: var(--accent-blue);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s ease, padding 0.4s ease;
}

.faq-item.active .faq-answer {
    max-height: 300px;
}

.faq-answer p {
    padding: 0 24px 20px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.7;
}



/* ============================================
   FOOTER
   ============================================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border-glass);
}

.footer-content {
    text-align: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 12px;
}

.footer-text {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: 0.8rem;
}

/* ============================================
   FIXED CONTACT BAR
   ============================================ */

/* PC: vertical sidebar on the left */
.contact-bar {
    position: fixed;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    z-index: 999;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 12px 6px;
    background: #ffffff;
    border-radius: 0 16px 16px 0;
    box-shadow: 2px 4px 20px rgba(0, 0, 0, 0.15);
    animation: contactBarSlideIn 0.5s ease-out;
}

@keyframes contactBarSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50%) translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateY(-50%) translateX(0);
    }
}

@keyframes contactBarSlideUp {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

.contact-bar-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    padding: 10px 12px;
    border-radius: 12px;
    text-decoration: none;
    color: #444;
    transition: all var(--transition-medium);
    cursor: pointer;
}

.contact-bar-item:hover {
    background: #f0f4ff;
    transform: scale(1.08);
    color: #222;
}

.contact-bar-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
}

.contact-bar-icon svg {
    width: 100%;
    height: 100%;
    transition: transform var(--transition-medium);
}

.contact-bar-item:hover .contact-bar-icon svg {
    transform: scale(1.12);
}

.contact-bar-label {
    font-family: var(--font-body);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.2px;
    white-space: nowrap;
    color: #555;
}

.contact-bar-item:hover .contact-bar-label {
    color: #222;
}

/* Give footer bottom padding for mobile bar */
.footer {
    padding-bottom: 40px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 1024px) {
    .support-hero-container {
        gap: 40px;
    }

    .product-overview {
        grid-template-columns: 1fr 1fr;
    }

    .color-gallery {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Mobile: horizontal bar at bottom */
@media (max-width: 768px) {
    :root {
        --section-padding: 70px 0;
    }

    .contact-bar {
        left: 50%;
        top: auto;
        bottom: 0;
        transform: translateX(-50%);
        flex-direction: row;
        gap: 0;
        padding: 2px 0 3px;
        width: 100%;
        border-radius: 0;
        justify-content: center;
        background: rgba(10, 14, 26, 0.35);
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        border: none;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        box-shadow: none;
        animation: contactBarSlideUp 0.5s ease-out;
    }

    .contact-bar-item {
        flex: 1;
        padding: 3px 6px;
        border-radius: 0;
        gap: 1px;
        color: rgba(255, 255, 255, 0.9);
    }

    .contact-bar-item:hover {
        background: rgba(255, 255, 255, 0.08);
        color: #fff;
    }

    .contact-bar-icon {
        width: 36px;
        height: 36px;
    }

    .contact-bar-label {
        color: rgba(255, 255, 255, 0.85);
        font-size: 0.7rem;
    }

    .contact-bar-item:hover .contact-bar-label {
        color: #fff;
    }

    .footer {
        padding-bottom: 60px;
    }

    /* Hide QR on mobile, show Zalo icon button */
    .qr-desktop-only {
        display: none !important;
    }

    .zalo-mobile-btn {
        display: flex;
        flex-direction: column;
        align-items: center;
        gap: 12px;
        padding: 20px;
        text-decoration: none;
        color: var(--text-primary);
        position: relative;
        z-index: 2;
        transition: all var(--transition-medium);
    }

    .zalo-mobile-btn:active {
        transform: scale(0.96);
    }

    .zalo-mobile-icon {
        width: 100px;
        height: 100px;
        display: block;
        filter: drop-shadow(0 4px 16px rgba(0, 104, 255, 0.35));
        transition: transform var(--transition-medium);
    }

    .zalo-mobile-icon svg {
        width: 100%;
        height: 100%;
    }

    .zalo-mobile-btn:hover .zalo-mobile-icon {
        transform: scale(1.06);
    }

    .zalo-mobile-text {
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--accent-blue);
        text-align: center;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 14, 26, 0.98);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 80px 32px 32px;
        gap: 4px;
        transition: right var(--transition-medium);
        border-left: 1px solid var(--border-glass);
    }

    .nav-menu.active {
        right: 0;
    }

    .nav-link {
        display: block;
        width: 100%;
        padding: 14px 16px;
    }

    .support-hero {
        min-height: auto;
        padding: 100px 0 60px;
    }

    .support-hero-container {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .support-hero-text {
        text-align: center;
    }

    .hero-subtitle {
        margin-left: auto;
        margin-right: auto;
    }

    .support-quick-links {
        align-items: stretch;
    }

    .product-overview {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .product-image img {
        max-width: 400px;
        margin: 0 auto;
        display: block;
    }

    .showcase-item {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .showcase-item-reverse {
        direction: ltr;
    }

    .showcase-text {
        text-align: center;
    }

    .showcase-text h3 {
        font-size: 1.25rem;
    }

    .showcase-banner-text {
        padding: 20px;
    }

    .specs-mini-grid {
        grid-template-columns: 1fr 1fr;
    }

    .color-gallery {
        grid-template-columns: repeat(2, 1fr);
    }

    .guide-steps-row {
        grid-template-columns: 1fr;
        max-width: 500px;
        margin-left: auto;
        margin-right: auto;
    }
}

@media (max-width: 480px) {
    .specs-mini-grid {
        grid-template-columns: 1fr;
    }

    .color-gallery {
        grid-template-columns: 1fr 1fr;
        gap: 12px;
    }

    .guide-step {
        flex-direction: column;
        gap: 16px;
        align-items: center;
        text-align: center;
    }
}