@import url('https://fonts.googleapis.com/css?family=Nunito:400,500,600,700,800,900|Quicksand:400,500,600,700&subset=vietnamese&display=swap');

:root {
  /* Brand Colors */
  --color-primary: #FF6B6B;
  --color-primary-dark: #FF4757;
  --color-secondary: #FF8E53;
  --color-accent: #6C5CE7;
  --color-accent-dark: #5F27CD;
  
  /* Foundation */
  --color-background: #F8F9FA;
  --color-surface: #FFFFFF;
  
  /* Text */
  --color-text: #2D3436;
  --color-text-light: #636E72;
  --color-muted: #DFE6E9;
  
  --font-heading: 'Nunito', sans-serif;
  --font-body: 'Quicksand', sans-serif;
  
  /* Glassmorphism */
  --glass-bg: rgba(255, 255, 255, 0.45);
  --glass-filter: blur(16px);
  --glass-border: 1px solid rgba(255, 255, 255, 0.7);
  --glass-border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.1);
  --glass-shadow-hover: 0 16px 40px 0 rgba(31, 38, 135, 0.15);
      
  --radius-btn: 24px;
  --radius-input: 20px;
  --radius-card: 36px;
  
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --spring: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-background);
    background-image: 
        radial-gradient(circle at 10% 10%, rgba(255, 107, 107, 0.25) 0%, transparent 40%),
        radial-gradient(circle at 90% 90%, rgba(108, 92, 231, 0.2) 0%, transparent 40%),
        radial-gradient(circle at 50% 50%, rgba(0, 206, 201, 0.2) 0%, transparent 60%);
    background-attachment: fixed;
    overflow-x: hidden;
}

h1, h2, h3, h4, .logo-text {
    font-family: var(--font-heading);
    color: var(--color-primary-dark);
    line-height: 1.2;
}

*:focus-visible { outline: 3px solid var(--color-primary); outline-offset: 4px; }

a { text-decoration: none; color: inherit; transition: var(--transition); }
ul { list-style: none; }

.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 24px; }
.text-center { text-align: center; }
.text-white { color: var(--color-surface); }
.mb-6 { margin-bottom: 1.5rem; }
.mb-8 { margin-bottom: 2rem; }
.mt-10 { margin-top: 2.5rem; }
.w-full { width: 100%; }
.grid-2 { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; }
.section-padding { padding: 100px 0; }
.bg-light { background-color: var(--glass-bg); backdrop-filter: var(--glass-filter); -webkit-backdrop-filter: var(--glass-filter); border-top: var(--glass-border); border-bottom: var(--glass-border-bottom); }

/* Buttons */
.btn-primary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 107, 107, 0.9);
    backdrop-filter: blur(4px);
    color: var(--color-surface) !important;
    padding: 14px 32px;
    min-height: 44px;
    min-width: 44px;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-size: 1.1rem;
    font-family: var(--font-heading);
    box-shadow: 0 6px 16px rgba(255, 107, 107, 0.3);
    border: none;
    cursor: pointer;
    text-align: center;
    transition: var(--spring);
}
.btn-primary:active { transform: scale(0.92); }

.btn-outline {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(4px);
    color: var(--color-primary-dark) !important;
    padding: 12px 28px;
    min-height: 44px;
    border-radius: var(--radius-btn);
    font-weight: 600;
    font-family: var(--font-heading);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
    border: 2px solid rgba(255, 255, 255, 0.8);
    transition: var(--spring);
}
.btn-outline:hover { box-shadow: 0 6px 16px rgba(0, 0, 0, 0.1); transform: translateY(-3px); background-color: rgba(255, 255, 255, 0.8); }
.btn-outline:active { transform: scale(0.92); box-shadow: 0 2px 8px rgba(0, 0, 0, 0.05); }

/* Navbar */
.navbar {
    position: fixed;
    top: 0; left: 0; width: 100%; z-index: 1000;
    background: rgba(255, 255, 255, 0.4);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.5);
    transition: var(--transition);
}
.nav-container { display: flex; justify-content: space-between; align-items: center; height: 80px; transition: var(--transition); }
.navbar.scrolled .nav-container { height: 60px; }
.logo-img { height: 34px; width: auto; object-fit: contain; transition: var(--transition); transform-origin: left center; }
.navbar.scrolled .logo-img { height: 26px; }
.nav-right { display: flex; align-items: center; gap: 40px; }
.nav-menu { display: flex; align-items: center; }
.nav-menu ul { display: flex; align-items: center; gap: 30px; }
.nav-menu a { font-weight: 600; font-size: 1.05rem; }
.nav-menu a:hover { color: var(--color-primary); }

.lang-switch {
    display: flex; align-items: center; gap: 8px;
    background: rgba(255, 255, 255, 0.45);
    backdrop-filter: blur(12px);
    padding: 6px;
    border: 1px solid rgba(255, 255, 255, 0.6);
    border-radius: var(--radius-btn);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.lang-btn {
    background: transparent; border: none; font-weight: 700; font-size: 0.9rem;
    cursor: pointer; padding: 6px 12px; border-radius: 16px;
    color: var(--color-text-light); transition: var(--spring);
    min-height: 44px;
    min-width: 44px;
}
.lang-btn.active {
    background: rgba(255, 107, 107, 0.9); color: var(--color-surface);
    box-shadow: 0 4px 10px rgba(255, 107, 107, 0.3);
}
.lang-btn:active { transform: scale(0.92); }

.mobile-menu-btn { display: none; min-height: 44px; min-width: 44px; justify-content: center; align-items: center; transition: var(--transition); transform-origin: right center; }

/* Hero */
.hero { padding: 160px 0 80px; position: relative; }
.hero-container { display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center; }
.hero-content h1 { font-size: 3.5rem; margin-bottom: 24px; color: var(--color-primary-dark); }
.hero-content p { font-size: 1.25rem; font-weight: 500; color: var(--color-text-light); margin-bottom: 40px; max-width: 90%; }
.image-wrapper img {
    width: 100%; height: auto;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-clay);
    object-fit: cover;
    border: 8px solid var(--color-surface);
}

/* Sections */
.section-title { font-size: 2.5rem; margin-bottom: 16px; color: var(--color-primary-dark); }
.section-subtitle { color: var(--color-text-light); font-weight: 600; font-size: 1.15rem; }

/* Cards (Glassmorphism) */
.testi-card, .news-card {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-filter);
    -webkit-backdrop-filter: var(--glass-filter);
    border: var(--glass-border);
    border-right: var(--glass-border-bottom);
    border-bottom: var(--glass-border-bottom);
    border-radius: var(--radius-card);
    box-shadow: var(--glass-shadow);
    transition: var(--spring);
}
.testi-card { padding: 40px; position: relative; }
.testi-card:hover, .news-card:hover { transform: translateY(-8px) !important; box-shadow: var(--glass-shadow-hover); background: rgba(255, 255, 255, 0.55); }

.quote-icon { font-size: 4rem; color: var(--color-secondary); opacity: 0.5; line-height: 1; position: absolute; top: 10px; left: 20px; font-family: 'Nunito', sans-serif; }
.testi-text { font-size: 1.1rem; color: var(--color-text); margin-bottom: 30px; position: relative; z-index: 1; font-weight: 600; }
.testi-author { display: flex; align-items: center; gap: 16px; }
.author-avatar img { width: 56px; height: 56px; border-radius: 50%; border: 2px solid rgba(255, 255, 255, 0.8); box-shadow: 0 4px 10px rgba(0,0,0,0.1); }
.author-info h4 { font-size: 1.1rem; margin-bottom: 4px; color: var(--color-text); }
.author-info span { font-size: 0.9rem; font-weight: 600; color: var(--color-text-light); }

.news-card { display: block; overflow: hidden; padding: 20px; }
.news-img { width: 100%; height: 200px; border-radius: 24px; margin-bottom: 20px; border: 4px solid rgba(255, 255, 255, 0.4); }
.news-content { padding: 10px; }
.news-date { font-size: 0.9rem; color: var(--color-primary); font-weight: 700; margin-bottom: 10px; display: block; }
.news-content h3 { font-size: 1.4rem; margin-bottom: 12px; color: var(--color-text); }
.news-content p { color: var(--color-text-light); margin-bottom: 20px; display: -webkit-box; -webkit-line-clamp: 3; line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; font-weight: 500;}
.read-more { font-weight: 700; color: var(--color-accent); font-family: var(--font-heading); background: rgba(108, 92, 231, 0.1); padding: 8px 16px; border-radius: var(--radius-btn); display: inline-block; transition: var(--spring); }
.news-card:hover .read-more { background: var(--color-accent); color: var(--color-surface); box-shadow: 0 4px 12px rgba(108, 92, 231, 0.3); }

/* Footer */
.footer {
    background-color: rgba(255, 255, 255, 0.3);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-top: var(--glass-border);
    color: var(--color-text);
    padding: 80px 0 0;
    position: relative;
    border-top-left-radius: 60px;
    border-top-right-radius: 60px;
    margin-top: 100px;
}
.contact-item { display: flex; align-items: flex-start; gap: 16px; margin-bottom: 24px; }
.c-icon { font-size: 1.8rem; background: rgba(255, 255, 255, 0.6); backdrop-filter: blur(8px); width: 48px; height: 48px; display: flex; align-items: center; justify-content: center; border-radius: 50%; box-shadow: 0 4px 10px rgba(0,0,0,0.05); border: 1px solid rgba(255, 255, 255, 0.8); }
.c-text strong { display: block; font-family: var(--font-heading); margin-bottom: 4px; font-size: 1.2rem; color: var(--color-primary-dark); }
.c-text p { color: var(--color-text-light); font-size: 1rem; font-weight: 600;}

.footer-form {
    background: var(--glass-bg);
    backdrop-filter: var(--glass-filter);
    border: var(--glass-border);
    padding: 40px;
    border-radius: var(--radius-card);
    box-shadow: var(--glass-shadow);
}
.contact-form input, .contact-form textarea {
    width: 100%; padding: 16px 20px; margin-bottom: 20px;
    border-radius: var(--radius-input);
    border: 1px solid rgba(255, 255, 255, 0.6);
    background: rgba(255, 255, 255, 0.4);
    color: var(--color-text);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 600;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.02);
    transition: var(--transition);
    min-height: 48px;
}
.contact-form input::placeholder, .contact-form textarea::placeholder {
    color: var(--color-text-light);
    opacity: 0.7;
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: rgba(255, 107, 107, 0.5);
    background: rgba(255, 255, 255, 0.6);
    box-shadow: 0 0 0 3px rgba(255, 107, 107, 0.1);
}

.footer-bottom { margin-top: 60px; padding: 24px 0; border-top: 2px solid rgba(249, 115, 22, 0.1); text-align: center; color: var(--color-text-light); font-size: 1rem; font-weight: 600; }

/* Stardust Cursor Effect */
.stardust {
    position: fixed;
    border-radius: 50%;
    pointer-events: none;
    z-index: 9999;
    box-shadow: 0 0 6px rgba(255, 107, 107, 0.5);
    transition: transform 0.8s cubic-bezier(0.2, 1, 0.3, 1), opacity 0.8s ease-out;
}

@media (max-width: 768px) {
    .stardust {
        display: none !important;
    }
}

/* Article Content Formatting */
#article-content {
    line-height: 1.8;
    overflow-wrap: break-word;
    word-wrap: break-word;
    word-break: break-word;
}
#article-content p {
    margin-bottom: 1.5rem;
}
#article-content h2, #article-content h3, #article-content h4 {
    color: var(--color-primary-dark);
    margin-top: 2rem;
    margin-bottom: 1rem;
}
#article-content ul, #article-content ol {
    margin-bottom: 1.5rem;
    padding-left: 2rem;
}
#article-content li {
    margin-bottom: 0.5rem;
}
#article-content img {
    max-width: 100%;
    height: auto;
    border-radius: var(--radius-card);
    box-shadow: var(--shadow-clay);
    display: block;
    margin: 2rem auto;
}
#article-content a {
    color: var(--color-primary);
    text-decoration: underline;
}

/* Animations */
.animate-on-scroll { opacity: 0; transform: translateY(30px); transition: opacity 0.8s ease, transform 0.8s ease; }
.animate-on-scroll.visible { opacity: 1; transform: translateY(0); }

/* Responsive */
@media (max-width: 992px) {
    .grid-2, .hero-container { grid-template-columns: 1fr; }
    .hero { padding-top: 120px; }
    .hero-content h1 { font-size: 2.8rem; }
    .section-title { font-size: 2rem; }
    .footer { border-top-left-radius: 40px; border-top-right-radius: 40px; }
}

@media (max-width: 768px) {
    .nav-right { gap: 12px; }
    .section-title { font-size: 1.8rem; }
    .nav-menu {
        position: fixed; top: 80px; left: -100%; width: 100%; height: calc(100vh - 80px);
        background: rgba(255, 255, 255, 0.98);
        backdrop-filter: blur(24px);
        -webkit-backdrop-filter: blur(24px);
        flex-direction: column; padding: 30px 24px 100px; transition: var(--transition);
        align-items: center; text-align: center;
        border-top: 1px solid rgba(0, 0, 0, 0.05);
        overflow-y: auto;
    }
    .navbar.scrolled .nav-menu { top: 60px; height: calc(100vh - 60px); }
    .nav-menu.active { left: 0; }
    .nav-menu ul { flex-direction: column; width: 100%; gap: 16px; }
    .nav-menu a { font-size: 1.15rem; }
    .mobile-menu-btn { display: flex; flex-direction: column; gap: 6px; background: none; border: none; cursor: pointer; position: relative; z-index: 1001; }
    .navbar.scrolled .mobile-menu-btn { transform: scale(0.75); }
    .mobile-menu-btn span { width: 28px; height: 3px; background: var(--color-primary-dark); border-radius: 3px; transition: var(--transition); transform-origin: left center; }
    
    .mobile-menu-btn.active span:nth-child(1) { transform: rotate(45deg); width: 32px; }
    .mobile-menu-btn.active span:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active span:nth-child(3) { transform: rotate(-45deg); width: 32px; }
}

/* Prevent flash of untranslated text (FOUT) */
[data-i18n] {
    visibility: hidden;
}

/* Dropdown Menu */
.has-dropdown { position: relative; }
.has-dropdown > a::after {
    content: "▼"; font-size: 0.7em; margin-left: 6px; vertical-align: middle; transition: var(--transition); display: inline-block;
}
.has-dropdown.open > a::after { transform: rotate(180deg); }
.dropdown-menu {
    position: absolute; top: 100%; left: 0; min-width: 260px;
    background: rgba(255, 255, 255, 0.8); backdrop-filter: blur(16px); -webkit-backdrop-filter: blur(16px);
    border: 1px solid rgba(255, 255, 255, 0.7);
    border-radius: var(--radius-btn);
    box-shadow: var(--glass-shadow-hover); padding: 16px;
    opacity: 0; visibility: hidden; transform: translateY(10px);
    transition: var(--transition); z-index: 10;
    display: flex; flex-direction: column; gap: 12px; pointer-events: none;
}
.has-dropdown.open .dropdown-menu {
    opacity: 1; visibility: visible; transform: translateY(0); pointer-events: auto;
}
.dropdown-menu li { width: 100%; }
.dropdown-menu a { display: block; padding: 10px 16px; border-radius: 16px; color: var(--color-text); font-weight: 600; transition: var(--spring); }
.dropdown-menu a:hover { background: rgba(255, 255, 255, 0.5); color: var(--color-primary-dark); padding-left: 20px; }

/* Mobile Dropdown adjustment */
@media (max-width: 768px) {
    .dropdown-menu {
        position: static; box-shadow: none; transform: none;
        opacity: 1; visibility: visible; display: none;
        margin-top: 12px; background: rgba(0,0,0,0.03); pointer-events: auto;
        border-radius: 16px; padding: 12px; gap: 8px;
    }
    .dropdown-menu a { font-size: 1.05rem; padding: 10px; }
    .has-dropdown.open .dropdown-menu { display: flex; }
    .has-dropdown.open > a::after { transform: rotate(180deg); }
}

/* Pagination Styling */
.pagination-container {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 40px;
}
.page-btn {
    width: 40px;
    height: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    border-radius: var(--radius-btn);
    background: white;
    border: 1px solid var(--color-muted);
    color: var(--color-text);
    font-weight: 600;
    cursor: pointer;
    transition: var(--spring);
    font-size: 1rem;
}
.page-btn:hover:not(.disabled) {
    background: var(--color-primary-light);
    color: var(--color-primary-dark);
    border-color: var(--color-primary-light);
}
.page-btn.active {
    background: var(--color-primary);
    color: white;
    border-color: var(--color-primary);
}
.page-btn.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}