:root {
    /* Brand Colors */
    --color-primary: #DD4C25;
    /* A deep, vibrant orange/red */
    --color-dark: #1A1A1A;
    /* Soft Black */
    --color-light: #F9F7F1;
    /* Off-white/Paper */
    --color-accent: #E8DCC4;
    /* Beige accent */
    --color-gray: #757575;

    /* Gradients */
    --gradient-1: linear-gradient(135deg, #FF9A9E 0%, #FECFEF 99%, #FECFEF 100%);
    /* Placeholder */
    --gradient-2: linear-gradient(120deg, #84fab0 0%, #8fd3f4 100%);
    --gradient-3: linear-gradient(120deg, #a1c4fd 0%, #c2e9fb 100%);

    /* Typography */
    --font-display: 'Syne', sans-serif;
    --font-body: 'IBM Plex Sans Condensed', sans-serif;

    /* Spacing */
    --header-height: 80px;
    --container-width: 1200px;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 8rem;

    /* Transitions */
    --transition-fast: 0.3s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    color: var(--color-dark);
    background-color: var(--color-light);
    background-image: url('../assets/textures/paper.webp');
    background-blend-mode: multiply;
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

ul {
    list-style: none;
}

/* Typography */
h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-display);
    font-weight: 700;
    line-height: 1.1;
}

body.lang-vn-active h1,
body.lang-vn-active h2,
body.lang-vn-active h3,
body.lang-vn-active h4,
body.lang-vn-active h5,
body.lang-vn-active h6 {
    font-family: var(--font-body);
    font-weight: 800;
    letter-spacing: -0.01em;
}

.section-label {
    display: block;
    font-family: var(--font-body);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    font-size: 0.8rem;
    color: var(--color-primary);
    margin-bottom: 1rem;
    font-weight: 600;
}

/* Header */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--header-height);
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0 5%;
    z-index: 1000;
    background: rgba(249, 247, 241, 0.85);
    /* Glassmorphism base */
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

/* Header Layout */
.header-left {
    display: flex;
    align-items: center;
}

.logo img {
    height: 50px;
    /* Adjust based on logo aspect ratio */
    width: auto;
    display: block;
}

/* Nav Container */
nav {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links {
    display: flex;
    gap: 2rem;
    margin: 0;
}

/* Language Switcher */
.lang-switch {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
}

.lang-switch a {
    color: var(--color-gray);
    transition: color 0.3s;
}

.lang-switch a.active,
.lang-switch a:hover {
    color: var(--color-primary);
}

.lang-switch .divider {
    color: var(--color-accent);
}

/* About Text Truncation */
.text-content {
    position: relative;
    overflow: hidden;
    transition: max-height 0.5s ease-out;
}

.text-content.truncated {
    max-height: 300px;
    /* Show only first part */
    mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
    -webkit-mask-image: linear-gradient(to bottom, black 50%, transparent 100%);
}

#read-more-btn {
    margin-top: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    color: var(--color-primary);
    text-decoration: underline;
    padding: 0.5rem 0;
    font-family: var(--font-body);
    font-weight: 500;
}

.mobile-menu-toggle {
    display: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background-color: var(--color-dark);
}

/* Main Layout */
.content-wrapper {
    max-width: var(--container-width);
    width: 100%;
    margin: 0 auto;
    padding: 0 2rem;
}

section {
    padding: var(--spacing-xl) 0;
    min-height: 60vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* Hero Section */
#hero {
    height: 100vh;
    padding: 0;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    overflow: hidden;
}

.hero-content {
    z-index: 2;
    padding: 0 1rem;
}

/* Hero Typography */
#hero h1 {
    font-family: var(--font-body);
    font-weight: 800;
    font-size: clamp(3rem, 8vw, 6rem);
    line-height: 1.1;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 1rem;
    letter-spacing: -0.02em;
}

#hero h2 {
    font-family: var(--font-display);
    font-weight: 600;
    font-size: clamp(1.5rem, 4vw, 3rem);
    text-transform: uppercase;
    color: var(--color-dark);
    letter-spacing: 0.1em;
    opacity: 0.9;
}

.tagline {
    margin-top: 2rem;
    font-size: 1.1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-gray);
}

/* Scroll Indicator */
.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    opacity: 0.5;
    animation: bounce 2s infinite;
}

.mouse {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-dark);
    border-radius: 12px;
    position: relative;
}

.mouse::before {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 6px;
    background-color: var(--color-dark);
    border-radius: 1px;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0) translateX(-50%);
    }

    40% {
        transform: translateY(-10px) translateX(-50%);
    }

    60% {
        transform: translateY(-5px) translateX(-50%);
    }
}

/* Section Headers generally */
.section-header {
    margin-bottom: 3rem;
    text-align: left;
    border-bottom: 2px solid var(--color-accent);
    padding-bottom: 1rem;
    display: inline-block;
    padding-right: 3rem;
}

.section-header h2 {
    font-size: 3rem;
}

/* About Section */
#about .text-content {
    max-width: 800px;
    font-size: 1.5rem;
    /* Large readable text */
    line-height: 1.5;
    font-weight: 300;
}

/* Programs Grid */
.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.card {
    background: #fff;
    border: 1px solid rgba(0, 0, 0, 0.05);
    padding: 1.5rem;
    border-radius: 8px;
    transition: var(--transition-fast);
    display: flex;
    flex-direction: column;
    height: 100%;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.05);
}

.card-image {
    width: 100%;
    height: 200px;
    background-color: #eee;
    border-radius: 4px;
    margin-bottom: 1.5rem;
}

.placeholder-gradient-1 {
    background: var(--gradient-1);
}

.placeholder-gradient-2 {
    background: var(--gradient-2);
}

.placeholder-gradient-3 {
    background: var(--gradient-3);
}

.card-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.card-content p {
    color: var(--color-gray);
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.btn-link {
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.btn-link::after {
    content: '→';
    transition: transform 0.3s;
}

.btn-link:hover::after {
    transform: translateX(5px);
}

/* Events List */
.event-list {
    display: flex;
    flex-direction: column;
}

.event-item {
    display: flex;
    align-items: center;
    padding: 2rem 0;
    border-bottom: 1px solid rgba(0, 0, 0, 0.1);
    transition: background 0.3s;
}

.event-item:hover {
    background-color: rgba(255, 255, 255, 0.5);
    padding-left: 1rem;
    /* Subtle shift */
}

.event-date {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin-right: 3rem;
    min-width: 60px;
}

.event-date .day {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-primary);
    line-height: 1;
}

.event-date .month {
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: 600;
}

.event-details {
    flex-grow: 1;
}

.event-details h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.event-details p {
    color: var(--color-gray);
    font-family: var(--font-body);
}

.btn-outline {
    border: 1px solid var(--color-dark);
    padding: 0.5rem 1.5rem;
    border-radius: 50px;
    text-transform: uppercase;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.05em;
}

.btn-outline:hover {
    background-color: var(--color-dark);
    color: #fff;
    opacity: 1;
}

/* Contact Section */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 6rem;
    margin-top: 3rem;
}

.contact-info h3,
.newsletter h3 {
    font-size: 1.8rem;
    margin-bottom: 1.5rem;
    color: var(--color-primary);
    text-transform: uppercase;
    font-weight: 700;
}

address {
    font-style: normal;
    font-size: 1.1rem;
    line-height: 1.8;
}

.contact-meta {
    margin-top: 2.5rem;
}

.contact-meta .email,
.contact-meta .tel {
    font-size: 1.1rem;
    font-weight: 600;
}

.contact-meta .email {
    margin-bottom: 0.5rem;
}

.contact-meta .tel {
    margin-bottom: 2.5rem;
}

.social-links {
    display: flex;
    gap: 2rem;
}

.social-links a {
    text-decoration: none;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.05em;
    border-bottom: 2px solid var(--color-primary);
    padding-bottom: 2px;
}

.newsletter-desc {
    font-family: var(--font-body);
    font-size: 0.95rem;
    color: var(--color-gray);
    margin-bottom: 2rem;
    max-width: 400px;
}

.newsletter-form {
    display: flex;
    border-bottom: 1px solid var(--color-dark);
    transition: var(--transition-fast);
}

.newsletter-form:focus-within {
    border-color: var(--color-primary);
}

.newsletter-form input {
    flex: 1;
    padding: 1rem 0;
    border: none;
    background: transparent;
    font-family: var(--font-body);
    font-size: 1rem;
    outline: none;
}

.newsletter-form button {
    padding: 1rem 0 1rem 1.5rem;
    background: transparent;
    color: var(--color-dark);
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    font-weight: 700;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
    transition: color var(--transition-fast);
}

.newsletter-form button:hover {
    color: var(--color-primary);
}

.newsletter-form button:hover {
    opacity: 0.8;
}

/* Footer */
footer {
    padding: 3rem 5%;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    font-size: 0.9rem;
    color: var(--color-gray);
}

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

/* Responsive */
@media (max-width: 768px) {
    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        height: 100vh;
        width: 70%;
        max-width: 300px;
        background: var(--color-light);
        flex-direction: column;
        padding: 6rem 2rem;
        transform: translateX(100%);
        transition: transform 0.3s cubic-bezier(0.77, 0, 0.175, 1);
        box-shadow: -5px 0 15px rgba(0, 0, 0, 0.1);
        display: flex;
        /* Ensure flex is active */
    }

    .nav-links.active {
        transform: translateX(0);
    }

    .mobile-menu-toggle {
        display: flex;
        z-index: 1001;
        margin-left: 1.5rem;
        /* Space from lang switch */
    }

    h1.title {
        font-size: 3.5rem;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .event-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }

    .event-item .btn-outline {
        align-self: flex-start;
    }
}

/* Language Toggling */
.lang-vn {
    display: none;
}

body.lang-vn-active .lang-en {
    display: none !important;
}

body.lang-vn-active .lang-vn {
    display: block !important;
}

/* Ensure inline elements behave correctly */
span.lang-vn {
    display: none;
}

body.lang-vn-active span.lang-vn {
    display: inline !important;
}

/* About Page Styles */
.page-header {
    background: var(--color-primary);
    color: var(--color-light);
    padding: calc(var(--header-height) + 4rem) 0 4rem;
    text-align: center;
}

.page-header h1 {
    font-size: 3rem;
    text-transform: uppercase;
    font-family: var(--font-body);
    font-weight: 800;
}

.team-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    margin-top: 3rem;
}

.team-group h3 {
    border-bottom: 2px solid var(--color-dark);
    padding-bottom: 0.5rem;
    margin-bottom: 2rem;
    font-family: var(--font-body);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 1.2rem;
    color: var(--color-primary);
}

.person-card {
    margin-bottom: 2rem;
    padding-bottom: 2rem;
    border-bottom: 1px dashed rgba(0, 0, 0, 0.1);
}

.person-card:last-child {
    border-bottom: none;
}

.person-info h4 {
    font-size: 1.5rem;
    margin-bottom: 0.25rem;
    font-family: var(--font-display);
}

.person-info .role {
    font-family: var(--font-body);
    font-weight: 600;
    color: var(--color-gray);
    text-transform: uppercase;
    font-size: 0.9rem;
    letter-spacing: 0.05em;
}

@media (max-width: 768px) {
    .team-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}