/* Global Design System & Variables */
:root {
    --primary: #FF5733;
    --primary-hover: #E03E1A;
    --primary-light: #FFEBE6;
    --secondary: #0284C7;
    --accent: #F59E0B;
    --dark: #1E293B;
    --dark-muted: #475569;
    --light-bg: #FFFBF7;
    --card-bg: #FFFFFF;
    --success: #10B981;
    --warning: #EF4444;
    --border-radius-sm: 10px;
    --border-radius-md: 18px;
    --border-radius-lg: 28px;
    --shadow-sm: 0 4px 10px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 10px 25px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 35px rgba(255, 87, 51, 0.18);
}

/* Reset & Base Styles */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Be Vietnam Pro', -apple-system, BlinkMacSystemFont, sans-serif;
    color: var(--dark);
    background-color: var(--light-bg);
    line-height: 1.65;
    font-size: 16px;
    padding-bottom: 75px;
}

h1, h2, h3, h4, .logo-text, .badge-pill, .btn {
    font-family: 'Nunito', sans-serif;
    font-weight: 800;
}

.container {
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Announcement Bar */
.announcement-bar {
    background: linear-gradient(90deg, #FF5733 0%, #FF8E53 100%);
    color: white;
    text-align: center;
    padding: 10px 15px;
    font-size: 14px;
    position: sticky;
    top: 0;
    z-index: 1000;
    box-shadow: var(--shadow-sm);
}

/* Header */
.site-header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.06);
    padding: 14px 0;
}

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

.logo {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 22px;
    color: var(--dark);
}

.logo-text {
    letter-spacing: -0.3px;
}

.logo .highlight {
    color: var(--primary);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

.nav-links a {
    text-decoration: none;
    color: var(--dark-muted);
    font-weight: 600;
    font-size: 15px;
    transition: color 0.2s;
}

.nav-links a:hover {
    color: var(--primary);
}

.mobile-header-actions {
    display: none;
    align-items: center;
    gap: 10px;
}

.mobile-call-btn {
    text-decoration: none;
    color: var(--primary);
    font-weight: 700;
    font-size: 13px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border-radius: 50px;
    text-decoration: none;
    border: none;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    letter-spacing: 0.3px;
}

.btn-primary {
    background: linear-gradient(135deg, #FF5733 0%, #E03E1A 100%);
    color: white;
    box-shadow: var(--shadow-lg);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(255, 87, 51, 0.35);
}

.btn-sm {
    padding: 10px 22px;
    font-size: 14px;
}

.btn-lg {
    padding: 18px 36px;
    font-size: 18px;
}

.btn-block {
    width: 100%;
    padding: 16px;
    font-size: 17px;
}

.btn-xs {
    padding: 6px 14px;
    font-size: 13px;
}

.pulse-effect {
    animation: pulse-btn 2.2s infinite;
}

@keyframes pulse-btn {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

/* 1. HERO SECTION */
.hero-section {
    padding: 50px 0 70px;
    background: radial-gradient(circle at 80% 20%, rgba(2, 132, 199, 0.08), transparent 40%),
                radial-gradient(circle at 20% 80%, rgba(255, 87, 51, 0.08), transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 40px;
    align-items: center;
}

.badge-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: #FFEBE6;
    color: var(--primary);
    padding: 8px 18px;
    border-radius: 50px;
    font-size: 13px;
    margin-bottom: 20px;
    box-shadow: 0 2px 8px rgba(255, 87, 51, 0.1);
}

.hero-title {
    font-size: 38px;
    line-height: 1.35;
    color: var(--dark);
    margin-bottom: 20px;
}

.highlight-text {
    background: linear-gradient(120deg, rgba(245, 158, 11, 0.3) 0%, rgba(255, 87, 51, 0.25) 100%);
    padding: 2px 8px;
    border-radius: 8px;
    color: #D9381E;
}

.hero-subtitle {
    font-size: 17px;
    line-height: 1.7;
    color: var(--dark-muted);
    margin-bottom: 25px;
}

.hero-quick-highlights {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
    background: white;
    padding: 20px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--secondary);
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    font-size: 15px;
    color: var(--dark);
}

.check-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.hero-cta-group {
    margin-bottom: 25px;
}

.trust-commitments {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 13px;
    color: var(--dark-muted);
    margin-top: 12px;
    font-weight: 600;
}

.trust-commitments .divider {
    opacity: 0.3;
}

.social-proof-strip {
    display: flex;
    align-items: center;
    gap: 15px;
}

.avatar-group {
    display: flex;
}

.avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: #F1F5F9;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px solid white;
    margin-left: -10px;
    box-shadow: var(--shadow-sm);
}

.avatar:first-child { margin-left: 0; }

.rating-info p {
    font-size: 13px;
    color: var(--dark-muted);
}

.stars {
    color: #F59E0B;
    font-size: 14px;
}

/* Hero Media */
.hero-media-mobile { display: none; }

.media-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: 0 25px 45px rgba(0, 0, 0, 0.12);
    background: white;
    padding: 12px;
}

.main-product-img {
    width: 100%;
    height: auto;
    border-radius: var(--border-radius-md);
    display: block;
}

.floating-badge {
    position: absolute;
    background: white;
    padding: 10px 16px;
    border-radius: 50px;
    box-shadow: var(--shadow-md);
    font-weight: 700;
    font-size: 13px;
}

.badge-discount {
    top: 25px;
    right: 25px;
    background: #EF4444;
    color: white;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 70px;
    height: 70px;
    border-radius: 50%;
    padding: 0;
    line-height: 1.1;
}

.discount-num { font-size: 20px; font-weight: 900; }
.discount-text { font-size: 10px; opacity: 0.9; }

.badge-guarantee {
    bottom: 25px;
    left: 25px;
}

/* Hero Image Thumbnails Selector */
.hero-thumbnails {
    display: flex;
    gap: 10px;
    margin-top: 16px;
    justify-content: center;
    flex-wrap: wrap;
}

.thumb-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background: white;
    border: 2px solid #E2E8F0;
    padding: 8px 14px;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.25s ease;
    font-size: 13px;
    font-weight: 700;
    color: var(--dark-muted);
    box-shadow: var(--shadow-sm);
}

.thumb-btn img {
    width: 32px;
    height: 32px;
    object-fit: cover;
    border-radius: 50%;
}

.thumb-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    transform: translateY(-2px);
}

.thumb-btn.active {
    border-color: var(--primary);
    background: #FFF5F2;
    color: var(--primary);
    box-shadow: 0 4px 12px rgba(255, 87, 51, 0.2);
}

.solution-img-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.img-caption {
    display: block;
    text-align: center;
    font-size: 13px;
    font-weight: 600;
    color: var(--dark-muted);
    padding: 8px;
    background: #F8FAFC;
    border-top: 1px solid #E2E8F0;
}

/* Sections General */
.section {
    padding: 70px 0;
}

.section-header {
    margin-bottom: 45px;
}

.section-tag {
    display: inline-block;
    padding: 6px 16px;
    border-radius: 50px;
    font-size: 13px;
    font-weight: 800;
    margin-bottom: 12px;
}

.warning-tag { background: #FEE2E2; color: #DC2626; }
.highlight-tag { background: #E0F2FE; color: #0284C7; }
.success-tag { background: #D1FAE5; color: #059669; }

.section-title {
    font-size: 32px;
    color: var(--dark);
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--dark-muted);
    max-width: 680px;
    margin: 0 auto;
}

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

/* 2. PROBLEM SECTION */
.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 22px;
    margin-bottom: 35px;
}

.problem-card {
    background: white;
    padding: 24px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    border: 1px solid #F1F5F9;
    transition: all 0.3s;
}

.problem-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
    border-color: #FECACA;
}

.problem-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.problem-icon {
    font-size: 26px;
}

.problem-card h3 {
    font-size: 17px;
    color: var(--dark);
}

.problem-card p {
    font-size: 14px;
    color: var(--dark-muted);
}

.agitation-box {
    background: linear-gradient(135deg, #FFF7ED 0%, #FFEDD5 100%);
    border-left: 6px solid var(--accent);
    padding: 22px 30px;
    border-radius: var(--border-radius-md);
    text-align: center;
    font-size: 18px;
    color: #9A3412;
    box-shadow: var(--shadow-sm);
}

.agitation-box span {
    font-weight: 900;
    text-decoration: underline;
    color: #C2410C;
}

/* 3. SOLUTION SECTION */
.solution-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 45px;
    align-items: center;
}

.solution-img {
    width: 100%;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-md);
    display: block;
}

.solution-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.solution-item {
    display: flex;
    gap: 16px;
    background: white;
    padding: 20px;
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-sm);
    border-left: 4px solid var(--primary);
}

.sol-icon {
    color: var(--primary);
    font-weight: 800;
    font-size: 20px;
}

.sol-text h3 {
    font-size: 17px;
    color: var(--dark);
    margin-bottom: 6px;
}

.sol-text p {
    font-size: 14px;
    color: var(--dark-muted);
}

/* 4. BENEFITS SECTION */
.benefits-container {
    display: flex;
    flex-direction: column;
    gap: 35px;
}

.benefit-group {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-sm);
}

.group-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 20px;
    color: var(--dark);
    margin-bottom: 20px;
    border-bottom: 2px solid #F1F5F9;
    padding-bottom: 12px;
}

.group-icon { font-size: 24px; }

.benefits-subgrid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 20px;
}

.benefit-card {
    background: var(--light-bg);
    padding: 22px;
    border-radius: var(--border-radius-md);
    border: 1px solid #E2E8F0;
    transition: transform 0.2s;
}

.benefit-card:hover {
    transform: translateY(-3px);
}

.card-kid { border-left: 4px solid var(--secondary); }
.card-parent { border-left: 4px solid var(--primary); }

.benefit-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.benefit-icon { font-size: 24px; }

.benefit-card h3 { font-size: 17px; }
.benefit-card p { font-size: 14px; color: var(--dark-muted); }

/* 5. BUNDLE SECTION */
.bundle-box {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.bundle-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 35px;
}

.bundle-item {
    background: #F8FAFC;
    padding: 24px;
    border-radius: var(--border-radius-md);
    text-align: center;
    border: 1px solid #E2E8F0;
}

.bundle-badge {
    display: inline-block;
    background: var(--secondary);
    color: white;
    font-weight: 800;
    font-size: 12px;
    padding: 4px 14px;
    border-radius: 50px;
    margin-bottom: 12px;
}

.bundle-item h4 {
    font-size: 18px;
    margin-bottom: 8px;
}

.bundle-item p {
    font-size: 14px;
    color: var(--dark-muted);
}

.bundle-gift-banner {
    background: linear-gradient(135deg, #ECFDF5 0%, #D1FAE5 100%);
    border: 2px dashed #059669;
    border-radius: var(--border-radius-md);
    padding: 25px;
    display: flex;
    align-items: center;
    gap: 20px;
}

.gift-icon {
    font-size: 40px;
}

.gift-text h3 {
    color: #065F46;
    font-size: 19px;
    margin-bottom: 4px;
}

.gift-text p {
    color: #047857;
    font-size: 15px;
}

/* 6. PRICING & ORDER SECTION */
.order-section {
    background: linear-gradient(180deg, #FFFBF7 0%, #FFEBE6 100%);
}

.order-wrapper {
    background: white;
    border-radius: var(--border-radius-lg);
    padding: 45px 35px;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.09);
}

.countdown-box {
    background: #FEF2F2;
    border: 1px solid #FCA5A5;
    padding: 10px 22px;
    border-radius: 50px;
    display: inline-flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 18px;
}

.cd-title { font-weight: 700; color: #991B1B; font-size: 14px; }
.timer { font-family: monospace; font-size: 22px; font-weight: 900; color: #DC2626; }

.order-title { font-size: 28px; color: var(--dark); margin-bottom: 6px; }
.order-subtitle { font-size: 15px; color: var(--dark-muted); }

.order-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 35px;
    margin-top: 35px;
}

/* Pricing Cards */
.pricing-container {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.pricing-card {
    background: var(--light-bg);
    padding: 25px;
    border-radius: var(--border-radius-md);
    border: 2px solid #E2E8F0;
    position: relative;
    cursor: pointer;
    transition: all 0.2s;
}

.pricing-card.active-card {
    border-color: var(--primary);
    background: #FFF5F2;
    box-shadow: var(--shadow-sm);
}

.pricing-card.popular-card {
    border-color: var(--accent);
}

.popular-ribbon {
    position: absolute;
    top: -12px;
    right: 20px;
    background: var(--accent);
    color: white;
    font-size: 11px;
    font-weight: 800;
    padding: 4px 12px;
    border-radius: 50px;
}

.price-badge-tag {
    display: inline-block;
    background: #CBD5E1;
    color: var(--dark);
    font-size: 11px;
    font-weight: 800;
    padding: 3px 10px;
    border-radius: 50px;
    margin-bottom: 8px;
}

.price-header h3 { font-size: 17px; margin-bottom: 8px; }

.price-tag {
    display: flex;
    align-items: baseline;
    gap: 10px;
    margin-bottom: 8px;
}

.current-price { font-size: 32px; font-weight: 900; color: var(--primary); }
.old-price { text-decoration: line-through; color: var(--dark-muted); font-size: 18px; }

.save-badge {
    display: inline-block;
    background: #DC2626;
    color: white;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 50px;
    margin-bottom: 15px;
}

.save-combo { background: #059669; }

.price-features {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
    font-size: 14px;
}

/* Order Form */
.order-form {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius-md);
    border: 1px solid #E2E8F0;
    box-shadow: var(--shadow-sm);
}

.order-form h3 {
    font-size: 18px;
    margin-bottom: 18px;
    border-bottom: 2px solid #F1F5F9;
    padding-bottom: 10px;
}

.combo-radio-selector {
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 20px;
}

.radio-label {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px;
    border: 2px solid #E2E8F0;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all 0.2s;
}

.radio-label.active {
    border-color: var(--primary);
    background: #FFF5F2;
}

.radio-info {
    display: flex;
    flex-direction: column;
    font-size: 14px;
}

.radio-info span {
    font-size: 12px;
    color: var(--dark-muted);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    font-weight: 700;
    font-size: 13px;
    margin-bottom: 6px;
}

.form-group input {
    width: 100%;
    padding: 12px 14px;
    border: 1px solid #CBD5E1;
    border-radius: var(--border-radius-sm);
    font-size: 15px;
    font-family: inherit;
    transition: border-color 0.2s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(255, 87, 51, 0.15);
}

.main-submit-btn {
    margin-top: 10px;
}

.form-note {
    font-size: 12px;
    color: var(--dark-muted);
    text-align: center;
    margin-top: 12px;
}

/* FAQ Section */
.faq-list {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.faq-item {
    background: white;
    border-radius: var(--border-radius-sm);
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.faq-question {
    padding: 18px 20px;
    font-weight: 700;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    font-size: 16px;
}

.faq-answer {
    padding: 0 20px 18px;
    font-size: 15px;
    color: var(--dark-muted);
    display: none;
}

.faq-item.active .faq-answer {
    display: block;
}

.faq-toggle {
    font-size: 20px;
    font-weight: 400;
    transition: transform 0.2s;
}

.faq-item.active .faq-toggle {
    transform: rotate(45deg);
}

/* Footer */
.site-footer {
    background: var(--dark);
    color: #94A3B8;
    padding: 35px 0;
    font-size: 14px;
}

.footer-brand { color: white; margin-bottom: 6px; }
.copyright { margin-top: 12px; font-size: 12px; opacity: 0.7; }

/* Floating Mobile Elements */
.floating-cta-bar {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: white;
    padding: 10px 16px;
    box-shadow: 0 -4px 15px rgba(0, 0, 0, 0.1);
    z-index: 999;
    align-items: center;
    justify-content: space-between;
}

.float-price {
    font-weight: 800;
    color: var(--primary);
    font-size: 16px;
    display: block;
}

.float-price del { font-size: 12px; color: var(--dark-muted); }
.float-gift { font-size: 11px; color: var(--success); font-weight: 700; }

/* Toast Notification */
.toast-notification {
    position: fixed;
    bottom: 80px;
    left: 20px;
    background: white;
    border-radius: var(--border-radius-md);
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.15);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    z-index: 990;
    max-width: 320px;
    transform: translateY(120px);
    opacity: 0;
    transition: all 0.4s ease;
}

.toast-notification.show {
    transform: translateY(0);
    opacity: 1;
}

.toast-avatar {
    width: 36px;
    height: 36px;
    background: #FFEBE6;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    flex-shrink: 0;
}

.toast-content p {
    font-size: 12px;
    color: var(--dark);
    line-height: 1.3;
}

.toast-time {
    font-size: 10px;
    color: var(--dark-muted);
}

/* Responsive Media Queries */
@media (max-width: 992px) {
    .hero-grid, .solution-grid, .order-grid {
        grid-template-columns: 1fr;
    }

    .hero-media-desktop { display: none; }
    .hero-media-mobile { display: block; margin-bottom: 25px; }

    .nav-links { display: none; }
    .mobile-header-actions { display: flex; }

    .bundle-gift-banner {
        flex-direction: column;
        text-align: center;
    }
}

@media (max-width: 576px) {
    .hero-title { font-size: 28px; }
    .section-title { font-size: 24px; }
    .floating-cta-bar { display: flex; }
    .toast-notification { left: 10px; right: 10px; max-width: none; }
}