/* styles.css */

/* --- SF PRO DISPLAY CUSTOM FONT FAMILY --- */
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Ultralight.otf") format("opentype");
    font-weight: 100;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-UltralightItalic.otf") format("opentype");
    font-weight: 100;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Thin.otf") format("opentype");
    font-weight: 200;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-ThinItalic.otf") format("opentype");
    font-weight: 200;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Light.otf") format("opentype");
    font-weight: 300;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-LightItalic.otf") format("opentype");
    font-weight: 300;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Regular.otf") format("opentype");
    font-weight: 400;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-RegularItalic.otf") format("opentype");
    font-weight: 400;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Medium.otf") format("opentype");
    font-weight: 500;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-MediumItalic.otf") format("opentype");
    font-weight: 500;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Semibold.otf") format("opentype");
    font-weight: 600;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-SemiboldItalic.otf") format("opentype");
    font-weight: 600;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Bold.otf") format("opentype");
    font-weight: 700;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-BoldItalic.otf") format("opentype");
    font-weight: 700;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Heavy.otf") format("opentype");
    font-weight: 800;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-HeavyItalic.otf") format("opentype");
    font-weight: 800;
    font-style: italic;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-Black.otf") format("opentype");
    font-weight: 900;
    font-style: normal;
}
@font-face {
    font-family: "SF Pro Display";
    src: url("assets/fonts/SF-Pro-Display-BlackItalic.otf") format("opentype");
    font-weight: 900;
    font-style: italic;
}

/* 1. Thiết lập biến màu sắc & cấu hình chung */
:root {
    --bg-main: #0B0C0E;
    --bg-darker: #050607;
    --bg-card: rgba(20, 21, 26, 0.6);
    --border-color: rgba(255, 255, 255, 0.07);
    --border-hover: rgba(255, 59, 48, 0.3);
    
    --text-primary: #F5F5F7;
    --text-secondary: #8E8E93;
    
    --accent-red: #FF3B30;
    --accent-red-rgb: 255, 59, 48;
    --accent-cyan: #00B0FF;
    --accent-green: #00E676;
    --accent-gold: #FFD700;
    
    --transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: "SF Pro Display", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
}

body {
    overflow-x: hidden;
}

/* 2. Tiện ích & Bố cục */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

.gradient-text {
    background: linear-gradient(135deg, #FFF 30%, var(--accent-red) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.accent-text {
    color: var(--accent-red);
}

.gold-text {
    color: var(--accent-gold);
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.2);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(255, 59, 48, 0.1);
    border: 1px solid rgba(255, 59, 48, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-red);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

/* Cấu hình Button chuyên nghiệp */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 12px 24px;
    font-size: 15px;
    font-weight: 600;
    border-radius: 8px;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-sm {
    padding: 8px 16px;
    font-size: 13px;
}

.btn-lg {
    padding: 16px 32px;
    font-size: 16px;
}

.btn-primary {
    background: var(--accent-red);
    color: #FFF;
    box-shadow: 0 4px 20px rgba(255, 59, 48, 0.3);
}

.btn-primary:hover {
    background: #E03026;
    transform: translateY(-2px);
    box-shadow: 0 6px 24px rgba(255, 59, 48, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-outline {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.3);
}

.btn-block {
    display: flex;
    width: 100%;
}

/* 3. Sticky Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background: rgba(11, 12, 14, 0.7);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 14px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

@media (min-width: 769px) {
    .nav-container {
        display: grid;
        grid-template-columns: 1fr auto 1fr;
    }
    
    .logo {
        justify-self: start;
    }
    
    .nav-links {
        justify-self: center;
    }
    
    .nav-cta {
        justify-self: end;
        display: flex;
    }
}

.logo-img {
    width: 32px;
    height: 32px;
    object-fit: contain;
}

.logo-text {
    font-size: 20px;
    font-weight: 700;
    letter-spacing: -0.5px;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

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

.mobile-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 22px;
    cursor: pointer;
}

/* Mobile Menu Drawer */
.mobile-menu {
    display: none;
    position: fixed;
    top: 61px;
    left: 0;
    width: 100%;
    background: rgba(11, 12, 14, 0.95);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-color);
    padding: 24px;
    flex-direction: column;
    gap: 20px;
    z-index: 999;
}

.mobile-menu a {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 16px;
    font-weight: 500;
    padding-bottom: 10px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.mobile-menu.active {
    display: flex;
}

/* 4. Hero Section */
.hero {
    position: relative;
    padding: 140px 0 80px 0;
    min-height: 85vh;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-glow {
    position: absolute;
    top: 20%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(255, 59, 48, 0.08) 0%, rgba(255, 59, 48, 0) 70%);
    z-index: 1;
    pointer-events: none;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.hero-content h1 {
    font-size: 48px;
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -1px;
    margin-bottom: 16px;
}

.hero-lead {
    font-size: 17px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 32px;
}

.hero-ctas {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
    margin-bottom: 40px;
}

.hero-features-list {
    display: flex;
    gap: 24px;
    flex-wrap: wrap;
}

.h-feat-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    color: var(--text-secondary);
}

.h-feat-item i {
    color: var(--accent-green);
    font-size: 16px;
}

/* Hero App Preview Mockup */
.hero-preview {
    display: flex;
    justify-content: center;
}

.mockup-frame {
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 16px;
    padding: 8px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.5), 0 0 50px rgba(255, 59, 48, 0.06);
    transition: var(--transition);
}

.mockup-frame::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, rgba(255,59,48,0.1) 100%);
    pointer-events: none;
}

.mockup-frame:hover {
    transform: translateY(-4px) scale(1.01);
    box-shadow: 0 35px 70px rgba(0, 0, 0, 0.6), 0 0 60px rgba(255, 59, 48, 0.1);
}

.mockup-img {
    max-width: 100%;
    border-radius: 12px;
    display: block;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
}

/* 5. Core Features Section */
.features {
    padding: 100px 0;
    background-color: var(--bg-darker);
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px auto;
}

.section-header h2 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.section-header p {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.6;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.feature-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 36px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.15), transparent);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.12);
    box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}

.feature-card:hover::before {
    opacity: 1;
}

.icon-box {
    width: 52px;
    height: 52px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 22px;
    margin-bottom: 24px;
}

/* Hiệu ứng phát sáng các hộp biểu tượng */
.red-glow {
    background: rgba(255, 59, 48, 0.1);
    color: var(--accent-red);
    border: 1px solid rgba(255, 59, 48, 0.2);
    box-shadow: 0 0 20px rgba(255, 59, 48, 0.1);
}

.cyan-glow {
    background: rgba(0, 176, 255, 0.1);
    color: var(--accent-cyan);
    border: 1px solid rgba(0, 176, 255, 0.2);
    box-shadow: 0 0 20px rgba(0, 176, 255, 0.1);
}

.green-glow {
    background: rgba(0, 230, 118, 0.1);
    color: var(--accent-green);
    border: 1px solid rgba(0, 230, 118, 0.2);
    box-shadow: 0 0 20px rgba(0, 230, 118, 0.1);
}

.gold-glow {
    background: rgba(255, 215, 0, 0.1);
    color: var(--accent-gold);
    border: 1px solid rgba(255, 215, 0, 0.2);
    box-shadow: 0 0 20px rgba(255, 215, 0, 0.1);
}

.feature-card h3 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 12px;
}

.feature-card p {
    font-size: 14.5px;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* 6. Admin Section */
.admin-section {
    padding: 100px 0;
    position: relative;
}

.admin-grid {
    display: grid;
    grid-template-columns: 0.85fr 1.15fr;
    gap: 60px;
    align-items: center;
}

.admin-preview {
    display: flex;
    justify-content: center;
}

.admin-icon-container {
    width: 280px;
    height: 280px;
    border-radius: 40px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    box-shadow: 0 25px 50px rgba(0, 0, 0, 0.4), 0 0 40px rgba(255, 215, 0, 0.04);
}

.admin-icon-img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    border-radius: 32px;
}

.admin-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 6px 14px;
    background: rgba(255, 215, 0, 0.1);
    border: 1px solid rgba(255, 215, 0, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--accent-gold);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 20px;
}

.admin-content h2 {
    font-size: 36px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 20px;
    line-height: 1.2;
}

.admin-content p {
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 28px;
}

.admin-bullets {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.admin-bullets li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    font-size: 14.5px;
    line-height: 1.5;
    color: var(--text-secondary);
}

.admin-bullets li i {
    color: var(--accent-gold);
    font-size: 18px;
    margin-top: 2px;
}

.admin-bullets li strong {
    color: var(--text-primary);
}

/* 7. Hot Update Demo Section */
.update-section {
    padding: 80px 0;
    background-color: var(--bg-darker);
}

.update-box {
    background: linear-gradient(135deg, rgba(20, 21, 26, 0.8) 0%, rgba(10, 11, 14, 0.9) 100%);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 48px;
    align-items: center;
    box-shadow: 0 20px 40px rgba(0,0,0,0.4);
}

.update-text h2 {
    font-size: 32px;
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 16px;
}

.update-text p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-secondary);
}

.update-visual {
    display: flex;
    justify-content: center;
}

.update-status-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    padding: 24px;
    width: 100%;
    max-width: 320px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    box-shadow: 0 10px 20px rgba(0,0,0,0.2);
}

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 14px;
}

.status-row span {
    color: var(--text-secondary);
}

.ver-val {
    font-family: monospace;
    font-size: 15px;
    color: var(--text-primary);
}

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 4px 10px;
    background: rgba(0, 230, 118, 0.1);
    border: 1px solid rgba(0, 230, 118, 0.2);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--accent-green);
}

/* 8. Downloads Section */
.downloads {
    padding: 100px 0;
}

.downloads-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
    margin-top: 40px;
}

.download-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 48px;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.download-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 30px 60px rgba(0,0,0,0.4);
}

.apple-card:hover {
    border-color: rgba(255, 255, 255, 0.2);
    box-shadow: 0 30px 60px rgba(255,255,255,0.03);
}

.win-card:hover {
    border-color: rgba(0, 176, 255, 0.2);
    box-shadow: 0 30px 60px rgba(0, 176, 255, 0.03);
}

.dl-icon {
    font-size: 48px;
    margin-bottom: 20px;
}

.apple-card .dl-icon {
    color: var(--text-primary);
}

.win-card .dl-icon {
    color: var(--accent-cyan);
}

.download-card h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 12px;
}

.dl-desc {
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--text-secondary);
    margin-bottom: 28px;
    max-width: 320px;
    flex-grow: 1;
}

.dl-meta {
    display: flex;
    gap: 16px;
    font-size: 12.5px;
    color: var(--text-secondary);
    margin-bottom: 24px;
    font-family: monospace;
}

/* 9. FAQ Section */
.faq {
    padding: 100px 0;
    background-color: var(--bg-darker);
}

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

.faq-item {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    transition: var(--transition);
}

.faq-question {
    width: 100%;
    padding: 24px;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.faq-question i {
    font-size: 14px;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    padding: 0 24px;
    transition: max-height 0.3s cubic-bezier(0, 1, 0, 1), padding 0.3s ease;
}

.faq-answer p {
    font-size: 14.5px;
    line-height: 1.6;
    color: var(--text-secondary);
    padding-bottom: 24px;
}

/* Trạng thái mở FAQ */
.faq-item.active {
    border-color: rgba(255, 255, 255, 0.15);
}

.faq-item.active .faq-question {
    color: var(--accent-red);
}

.faq-item.active .faq-question i {
    transform: rotate(180deg);
    color: var(--accent-red);
}

.faq-item.active .faq-answer {
    max-height: 500px; /* Thích ứng chiều cao kéo giãn */
    transition: max-height 0.5s cubic-bezier(1, 0, 1, 0), padding 0.3s ease;
}

/* 10. Footer Section */
.footer {
    padding: 80px 0 0 0;
    border-top: 1px solid var(--border-color);
    background-color: var(--bg-darker);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 0.8fr 1fr;
    gap: 48px;
    margin-bottom: 60px;
}

.footer-brand .logo {
    margin-bottom: 20px;
}

.footer-brand p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--text-secondary);
    max-width: 320px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links h4, .footer-contact h4 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 16px;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 14px;
    transition: var(--transition);
}

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

.footer-contact p {
    font-size: 14px;
    color: var(--text-secondary);
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-contact p a {
    color: var(--text-secondary);
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 10px;
    transition: var(--transition);
}

.footer-contact p a:hover {
    color: var(--text-primary);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.05);
    padding: 30px 0;
}

.footer-bottom-flex {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.footer-bottom p {
    font-size: 13.5px;
    color: var(--text-secondary);
}

.social-links {
    display: flex;
    gap: 16px;
}

.social-links a {
    color: var(--text-secondary);
    font-size: 18px;
    transition: var(--transition);
}

.social-links a:hover {
    color: var(--accent-red);
}

/* ==========================================================================
   Pricing Section (Bảng giá)
   ========================================================================== */
.pricing {
    position: relative;
    padding: 100px 0;
    background: radial-gradient(circle at 50% 50%, rgba(255, 215, 0, 0.01) 0%, transparent 70%);
    border-top: 1px solid rgba(255, 255, 255, 0.03);
}

.pricing .container {
    max-width: 1440px;
    width: 95%;
}

.pricing-grid {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 20px;
    margin-top: 50px;
}

.pricing-card {
    position: relative;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 24px;
    padding: 36px 20px;
    display: flex;
    flex-direction: column;
    align-items: stretch;
    transition: var(--transition);
    overflow: hidden;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    width: 250px;
    flex: 0 1 250px;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: rgba(255, 255, 255, 0.15);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.pricing-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    font-size: 10px;
    font-weight: 700;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-card.featured {
    background: linear-gradient(135deg, rgba(255, 59, 48, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 2px solid var(--accent-red);
    box-shadow: 0 10px 30px rgba(255, 59, 48, 0.05);
}

.pricing-card.featured .pricing-badge {
    background: linear-gradient(90deg, #ff4b2b, #ff416c);
    color: #fff;
}

.pricing-card.best-value {
    background: linear-gradient(135deg, rgba(0, 229, 255, 0.05) 0%, rgba(255, 255, 255, 0.01) 100%);
    border: 2px solid var(--accent-cyan);
    box-shadow: 0 10px 30px rgba(0, 229, 255, 0.05);
}

.pricing-card.best-value .pricing-badge {
    background: linear-gradient(90deg, #00B0FF, #00E5FF);
    color: #000;
}

@keyframes goldPulse {
    0% {
        border-color: #FFD700;
        box-shadow: 0 0 15px rgba(255, 215, 0, 0.35), inset 0 1px 0 rgba(255, 215, 0, 0.2);
    }
    100% {
        border-color: #FF8a00;
        box-shadow: 0 0 35px rgba(255, 215, 0, 0.7), inset 0 1px 0 rgba(255, 215, 0, 0.4);
    }
}

.pricing-card.full-premium {
    background: linear-gradient(135deg, rgba(255, 215, 0, 0.15) 0%, rgba(20, 15, 0, 0.95) 100%) !important;
    border: 3px solid #FFD700 !important;
    box-shadow: 0 10px 30px rgba(255, 215, 0, 0.25), inset 0 1px 0 rgba(255, 215, 0, 0.3);
    animation: goldPulse 2s infinite alternate ease-in-out;
}

.pricing-card.full-premium:hover {
    transform: translateY(-8px);
    animation: none; /* stop pulse on hover for standard feedback */
    border-color: #FF8a00 !important;
    box-shadow: 0 20px 45px rgba(255, 215, 0, 0.8), inset 0 1px 0 rgba(255, 215, 0, 0.5) !important;
}

.pricing-card.full-premium .pricing-badge {
    background: linear-gradient(90deg, #FFD700, #FFA500);
    color: #000;
    font-weight: 800;
    box-shadow: 0 4px 12px rgba(255, 215, 0, 0.3);
}

.pricing-card.full-premium .price-number {
    background: linear-gradient(90deg, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-size: 32px;
    font-weight: 900;
}

.pricing-card.full-premium h3 {
    color: #FFD700 !important;
    font-weight: 800;
    text-shadow: 0 0 10px rgba(255, 215, 0, 0.4);
}

.pricing-header {
    text-align: center;
    margin-bottom: 20px;
}

.pricing-header h3 {
    font-size: 18px;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.price-box {
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 2px;
    margin: 12px 0;
}

.price-currency {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    align-self: flex-start;
    margin-top: 4px;
}

.price-number {
    font-size: 36px;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.pricing-card.featured .price-number {
    background: linear-gradient(90deg, #ff4b2b, #ff8a00);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.pricing-card.best-value .price-number {
    background: linear-gradient(90deg, #00B0FF, #00E5FF);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.price-period {
    font-size: 13px;
    color: var(--text-secondary);
    margin-left: 4px;
}

.pricing-features {
    list-style: none;
    padding: 0;
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 12px;
    flex-grow: 1;
}

.pricing-features li {
    font-size: 13px;
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: 8px;
    text-align: left;
}

.pricing-features li i {
    font-size: 13px;
    color: #00E676;
    flex-shrink: 0;
}

.pricing-features li.disabled {
    opacity: 0.4;
    text-decoration: line-through;
}

.pricing-features li.disabled i {
    color: var(--text-secondary);
}

.pricing-cta {
    margin-top: auto;
}

/* 11. Responsive Breakpoints (Thiết kế phản hồi tốt) */

/* Pricing cards wrap automatically using flexbox on smaller desktop layouts */

@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .hero-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .hero-ctas {
        justify-content: center;
    }
    
    .hero-features-list {
        justify-content: center;
    }
    
    .admin-grid {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 40px;
    }
    
    .admin-content {
        display: flex;
        flex-direction: column;
        align-items: center;
    }
    
    .admin-bullets {
        align-items: flex-start;
        max-width: 500px;
    }

    /* pricing-grid naturally wraps centered on tablets */
}

@media (max-width: 768px) {
    .nav-links, .nav-cta {
        display: none;
    }
    
    .mobile-toggle {
        display: block;
    }
    
    .hero {
        padding: 100px 0 60px 0;
    }
    
    .hero-content h1 {
        font-size: 36px;
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .update-box {
        grid-template-columns: 1fr;
        padding: 32px;
        gap: 32px;
        text-align: center;
    }
    
    .update-visual {
        width: 100%;
    }
    
    .update-status-card {
        max-width: 100%;
    }
    
    .downloads-grid {
        grid-template-columns: 1fr;
    }
    
    .download-card {
        padding: 32px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .footer-bottom-flex {
        flex-direction: column;
        text-align: center;
    }
    
    .pricing-card {
        width: 100% !important;
        max-width: 320px !important;
        flex: 1 1 100% !important;
    }
}