/* ========================================
   Mai Anh Do & David Nguyen Foundation
   Professional Website Styles
   ======================================== */

/* CSS Variables */
:root {
    --primary-color: #1a5f7a;
    --primary-dark: #134b61;
    --primary-light: #2d8bb3;
    --secondary-color: #c49b3e;
    --secondary-light: #d9b35d;
    --text-dark: #2c3e50;
    --text-light: #6c757d;
    --text-white: #ffffff;
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --bg-dark: #1a2a3a;
    --border-color: #e9ecef;
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.12);
    --transition: all 0.3s ease;
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --max-width: 1200px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--bg-white);
}

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

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

a:hover {
    color: var(--primary-dark);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-weight: 600;
    line-height: 1.3;
    color: var(--text-dark);
    margin-bottom: 1rem;
}

h1 { font-size: 2.75rem; }
h2 { font-size: 2.25rem; }
h3 { font-size: 1.75rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
    margin-bottom: 1rem;
    color: var(--text-light);
}

/* Container */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* ========================================
   Header & Navigation
   ======================================== */
header {
    background: var(--bg-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 1.5rem;
    max-width: var(--max-width);
    margin: 0 auto;
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo img {
    height: 60px;
    width: auto;
}

.logo-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-color);
    line-height: 1.2;
}

.logo-text span {
    display: block;
    font-size: 0.85rem;
    font-weight: 400;
    color: var(--text-light);
}

/* Navigation */
nav ul {
    display: flex;
    list-style: none;
    gap: 0.5rem;
}

nav a {
    display: block;
    padding: 0.75rem 1.25rem;
    color: var(--text-dark);
    font-weight: 500;
    border-radius: var(--radius-md);
    transition: var(--transition);
}

nav a:hover,
nav a.active {
    background: var(--primary-color);
    color: var(--text-white);
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    cursor: pointer;
    padding: 8px;
    width: 44px;
    height: 44px;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
}

.menu-toggle span {
    display: block;
    width: 22px;
    height: 3px;
    background-color: #2c3e50;
    border-radius: 2px;
    transition: var(--transition);
}

/* ========================================
   Hero Section
   ======================================== */
.hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    padding: 5rem 1.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.05'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.hero h1 {
    color: var(--text-white);
    font-size: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

.hero .motto {
    font-size: 1.35rem;
    font-style: italic;
    opacity: 0.95;
    margin-bottom: 2rem;
}

.hero .motto cite {
    display: block;
    font-size: 1rem;
    margin-top: 0.5rem;
    font-style: normal;
    opacity: 0.8;
}

/* Page Hero (smaller) */
.page-hero {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--primary-dark) 100%);
    color: var(--text-white);
    padding: 3rem 1.5rem;
    text-align: center;
}

.page-hero h1 {
    color: var(--text-white);
    margin-bottom: 0;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    text-align: center;
}

.btn-primary {
    background: var(--secondary-color);
    color: var(--text-white);
}

.btn-primary:hover {
    background: var(--secondary-light);
    color: var(--text-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--text-white);
    border: 2px solid var(--text-white);
}

.btn-outline:hover {
    background: var(--text-white);
    color: var(--primary-color);
}

/* ========================================
   Sections
   ======================================== */
section {
    padding: 5rem 0;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    position: relative;
    display: inline-block;
    padding-bottom: 1rem;
}

.section-header h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.section-header p {
    max-width: 600px;
    margin: 1rem auto 0;
}

/* ========================================
   About Section / Cards
   ======================================== */
.about-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.about-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border-top: 4px solid var(--primary-color);
    transition: var(--transition);
}

.about-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.about-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.about-card p {
    margin-bottom: 0;
}

/* Featured Image */
.featured-image {
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    margin-bottom: 2rem;
}

.featured-image img {
    width: 100%;
    height: auto;
}

/* ========================================
   News / Posts
   ======================================== */
.news-grid {
    display: grid;
    gap: 2rem;
}

.news-card {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: var(--transition);
}

.news-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.news-card-image {
    height: 200px;
    overflow: hidden;
}

.news-card-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.news-card-content {
    padding: 1.5rem;
}

.news-card-date {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: 0.5rem;
}

.news-card h3 {
    margin-bottom: 1rem;
}

.news-card h3 a {
    color: var(--text-dark);
}

.news-card h3 a:hover {
    color: var(--primary-color);
}

/* Featured News */
.featured-news {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: 2rem;
    align-items: start;
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    padding: 2rem;
}

.featured-news-image {
    border-radius: var(--radius-md);
    overflow: hidden;
}

.featured-news-content h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

/* ========================================
   Scholars Section
   ======================================== */
.scholars-year {
    margin-bottom: 4rem;
}

.scholars-year h2 {
    color: var(--primary-color);
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 0.75rem;
    margin-bottom: 2rem;
}

.scholar-card {
    display: grid;
    grid-template-columns: 180px 1fr;
    gap: 2rem;
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.scholar-photo {
    width: 180px;
    height: 220px;
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.scholar-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.scholar-info h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.scholar-info p {
    line-height: 1.8;
}

/* ========================================
   Team Section
   ======================================== */
.team-section {
    margin-bottom: 4rem;
}

.team-section h2 {
    text-align: center;
    margin-bottom: 2.5rem;
    position: relative;
    padding-bottom: 1rem;
}

.team-section h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--secondary-color);
    border-radius: 2px;
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.team-card {
    background: var(--bg-white);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.team-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.team-photo {
    width: 150px;
    height: 150px;
    border-radius: 50%;
    overflow: hidden;
    margin: 0 auto 1.5rem;
    border: 4px solid var(--primary-light);
    box-shadow: var(--shadow-md);
}

.team-photo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.team-card h4 {
    color: var(--text-dark);
    margin-bottom: 0.5rem;
}

.team-card .role {
    font-size: 0.875rem;
    color: var(--primary-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 1rem;
}

.team-card p {
    font-size: 0.95rem;
}

/* ========================================
   Scholarship Page
   ======================================== */
.scholarship-benefits {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
}

.benefit-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.5rem;
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.benefit-icon {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.benefit-icon svg {
    width: 24px;
    height: 24px;
    fill: var(--text-white);
}

.benefit-text h4 {
    margin-bottom: 0.5rem;
}

.benefit-text p {
    margin-bottom: 0;
    font-size: 0.95rem;
}

.requirements-list {
    list-style: none;
    margin: 1.5rem 0;
}

.requirements-list li {
    padding: 0.75rem 0;
    padding-left: 2rem;
    position: relative;
    border-bottom: 1px solid var(--border-color);
}

.requirements-list li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: 700;
}

/* ========================================
   Contact Page
   ======================================== */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.contact-card {
    background: var(--bg-white);
    padding: 2.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    text-align: center;
    transition: var(--transition);
}

.contact-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.contact-icon {
    width: 70px;
    height: 70px;
    background: linear-gradient(135deg, var(--primary-color), var(--primary-light));
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.contact-icon svg {
    width: 32px;
    height: 32px;
    fill: var(--text-white);
}

.contact-card h4 {
    margin-bottom: 0.75rem;
}

.contact-card a {
    font-size: 1.1rem;
    font-weight: 500;
}

/* ========================================
   Footer
   ======================================== */
footer {
    background: var(--bg-dark);
    color: var(--text-white);
    padding: 4rem 0 2rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: 1.5rem;
}

.footer-brand .motto {
    font-style: italic;
    font-size: 0.95rem;
}

.footer-section h4 {
    color: var(--text-white);
    margin-bottom: 1.25rem;
    font-size: 1.1rem;
}

.footer-links {
    list-style: none;
}

.footer-links li {
    margin-bottom: 0.75rem;
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
}

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

.social-links {
    display: flex;
    gap: 1rem;
}

.social-link {
    width: 44px;
    height: 44px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--primary-color);
}

.social-link svg {
    width: 20px;
    height: 20px;
    fill: var(--text-white);
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 2rem;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
    margin-bottom: 0;
}

/* ========================================
   Content Section (generic)
   ======================================== */
.content-section {
    background: var(--bg-light);
}

.content-wrapper {
    max-width: 900px;
    margin: 0 auto;
}

.content-box {
    background: var(--bg-white);
    padding: 3rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 992px) {
    .footer-content {
        grid-template-columns: 1fr 1fr;
    }
    
    .featured-news {
        grid-template-columns: 1fr;
    }
    
    .scholar-card {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .scholar-photo {
        margin: 0 auto;
    }
}

@media (max-width: 768px) {
    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.75rem; }
    h3 { font-size: 1.5rem; }
    
    .header-container {
        flex-wrap: wrap;
        position: relative;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    nav {
        flex-basis: 100%;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
    }
    
    nav.active {
        max-height: 500px;
    }
    
    nav ul {
        flex-direction: column;
        padding: 0.5rem 0 1rem;
    }
    
    nav a {
        padding: 1rem;
        border-radius: 0;
        border-bottom: 1px solid var(--border-color);
    }

    nav a:last-child {
        border-bottom: none;
    }
    
    .hero {
        padding: 3rem 1rem;
    }
    
    .hero h1 {
        font-size: 2.25rem;
    }
    
    section {
        padding: 3rem 0;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
        text-align: center;
    }
    
    .social-links {
        justify-content: center;
    }
    
    .content-box {
        padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    .logo-text {
        font-size: 1rem;
    }
    
    .logo img {
        height: 50px;
    }
    
    .btn {
        width: 100%;
        padding: 1rem;
    }
}

/* ========================================
   Utilities
   ======================================== */
.text-center { text-align: center; }
.text-primary { color: var(--primary-color); }
.text-secondary { color: var(--secondary-color); }
.bg-light { background-color: var(--bg-light); }
.bg-white { background-color: var(--bg-white); }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }
.py-2 { padding-top: 2rem; padding-bottom: 2rem; }