:root {
    --primary-blue: #2563EB;
    --light-blue: #60A5FA;
    --dark-blue: #1E40AF;
    --accent-blue: #3B82F6;
    --primary-green: #059669;
    --light-green: #34D399;
    --dark-green: #047857;
    --black: #0F172A;
    --dark-gray: #1E293B;
    --white: #FFFFFF;
    --light-gray: #F8FAFC;
    --text-dark: #1E293B;
    --text-light: #64748B;
    --shadow: 0 4px 20px rgba(37, 99, 235, 0.1);
    --shadow-lg: 0 10px 40px rgba(37, 99, 235, 0.15);
}

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

body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden; /* Chỉ ẩn scroll ngang */
    /* Không ẩn scroll dọc để ảnh có thể hiển thị đầy đủ */
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, var(--primary-blue) 0%, var(--dark-blue) 50%, var(--black) 100%);
    color: var(--white);
   /** padding: 120px 20px 100px 20px; /* Tăng padding-top để có không gian cho ảnh */ 
    text-align: center;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: visible;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(96, 165, 250, 0.1) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    overflow: visible;
    padding-top: 40px; /* Thêm padding để ảnh không bị cắt */
}

.profile-section {
    margin-bottom: 50px;
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    overflow: visible;
    padding-top: 30px; /* Thêm padding-top để ảnh có không gian */
}

.profile-photo {
    width: 400px;
    height: 400px;
    border-radius: 50%;
    margin-bottom: 40px; /* Tăng margin-bottom */
    margin-top: 20px; /* Thêm margin-top để đẩy ảnh xuống */
    object-fit: contain;
    object-position: center top; /* Đảm bảo phần đầu được ưu tiên */
    transition: all 0.6s cubic-bezier(0.25, 0.46, 0.45, 0.94);
    position: relative;
    z-index: 15;
    
    /* Shadow mờ cho ảnh tràn ra ngoài */
    filter: drop-shadow(0 25px 60px rgba(0, 0, 0, 0.4)) 
            drop-shadow(0 10px 30px rgba(96, 165, 250, 0.3))
            drop-shadow(0 0 80px rgba(37, 99, 235, 0.2));
    
    /* Hiệu ứng glow xung quanh ảnh */
    box-shadow: 
        0 0 100px rgba(96, 165, 250, 0.2),
        0 0 200px rgba(37, 99, 235, 0.1);
    
    /* Đảm bảo ảnh không bị cắt */
    transform: translateZ(0) scale(1);
    will-change: transform, filter;
}

.profile-photo:hover {
    transform: translateZ(0) scale(1.12); /* Giảm scale để tránh bị cắt khi hover */
    filter: drop-shadow(0 30px 80px rgba(0, 0, 0, 0.5)) 
            drop-shadow(0 15px 40px rgba(96, 165, 250, 0.4))
            drop-shadow(0 0 120px rgba(37, 99, 235, 0.3));
    
    box-shadow: 
        0 0 140px rgba(96, 165, 250, 0.3),
        0 0 280px rgba(37, 99, 235, 0.15);
}

/* Sửa lại pseudo-elements */
.profile-photo::before {
    content: '';
    position: absolute;
    top: -40px;
    left: -40px;
    right: -40px;
    bottom: -40px;
    background: conic-gradient(
        from 0deg,
        rgba(96, 165, 250, 0.4),
        rgba(37, 99, 235, 0.3),
        rgba(5, 150, 105, 0.3),
        rgba(96, 165, 250, 0.4)
    );
    border-radius: 50%;
    z-index: -1;
    animation: rotate-glow 10s linear infinite;
    opacity: 0.5;
    filter: blur(20px);
}

.profile-photo::after {
    content: '';
    position: absolute;
    top: -20px;
    left: -20px;
    right: -20px;
    bottom: -20px;
    background: radial-gradient(
        circle,
        rgba(96, 165, 250, 0.3) 0%,
        rgba(37, 99, 235, 0.2) 40%,
        transparent 70%
    );
    border-radius: 50%;
    z-index: -1;
    animation: pulse-glow 4s ease-in-out infinite;
    filter: blur(10px);
}

@keyframes rotate-glow {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}

@keyframes pulse-glow {
    0%, 100% {
        transform: scale(1);
        opacity: 0.4;
    }
    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }
}

/* Đảm bảo body có thể handle ảnh lớn */
body {
    font-family: 'Inter', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.7;
    color: var(--text-dark);
    background-color: var(--white);
    overflow-x: hidden; /* Chỉ ẩn scroll ngang */
    /* Không ẩn scroll dọc để ảnh có thể hiển thị đầy đủ */
}

/* Cập nhật pulse effect */
.profile-section::before {
    content: '';
    position: absolute;
    top: 60%; /* Điều chỉnh vị trí để không che ảnh */
    left: 50%;
    transform: translate(-50%, -50%);
    width: 500px; /* Tăng để bao quanh ảnh lớn */
    height: 500px;
    background: radial-gradient(circle, rgba(96, 165, 250, 0.1) 0%, transparent 70%);
    border-radius: 50%;
    z-index: 1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        transform: translate(-50%, -50%) scale(1);
        opacity: 0.5;
    }
    50% {
        transform: translate(-50%, -50%) scale(1.1);
        opacity: 0.3;
    }
}

.logo {
    width: 90px; /* Tăng từ 70px lên 90px để cân đối với ảnh lớn hơn */
    height: 90px;
    /* Thay đổi positioning để không đè lên ảnh */
    position: static;
    background: var(--white);
    border-radius: 50%;
    padding: 15px; /* Tăng padding */
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
    margin-top: -20px; /* Kéo lên gần ảnh */
    border: 3px solid var(--primary-blue); /* Thêm border xanh dương */
    transition: all 0.3s ease;
}

.logo:hover {
    transform: translateY(-5px);
    box-shadow: 0 12px 35px rgba(37, 99, 235, 0.3);
}

.intro-text h1 {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 15px;
    letter-spacing: -1px;
    background: linear-gradient(135deg, var(--white), var(--light-blue));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 1.8rem;
    font-weight: 500;
    margin-bottom: 15px;
    color: var(--light-blue);
}

.description {
    font-size: 1.2rem;
    margin-bottom: 50px;
    opacity: 0.9;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.cta-buttons {
    display: flex;
    gap: 25px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 18px 35px;
    text-decoration: none;
    border-radius: 60px;
    font-weight: 600;
    font-size: 1.1rem;
    transition: all 0.3s ease;
    border: 2px solid transparent;
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn.primary {
    background: linear-gradient(135deg, var(--primary-green), var(--dark-green));
    color: var(--white);
    box-shadow: var(--shadow);
}

.btn.primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 8px 30px rgba(5, 150, 105, 0.4);
}

.btn.secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
    backdrop-filter: blur(10px);
}

.btn.secondary:hover {
    background: var(--white);
    color: var(--primary-blue);
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

/* Navigation */
.main-nav {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid rgba(37, 99, 235, 0.1);
}

.main-nav ul {
    display: flex;
    justify-content: center;
    list-style: none;
    padding: 0;
    margin: 0;
}

.main-nav a {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 25px 35px;
    text-decoration: none;
    color: var(--text-dark);
    font-weight: 600;
    transition: all 0.3s ease;
    border-bottom: 3px solid transparent;
    position: relative;
}

.main-nav a::before {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    width: 0;
    height: 3px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    transition: all 0.3s ease;
    transform: translateX(-50%);
}

.main-nav a:hover::before {
    width: 100%;
}

.main-nav a:hover {
    color: var(--primary-blue);
    background: rgba(37, 99, 235, 0.05);
}

/* Sections */
.section {
    padding: 100px 0;
}

.alt-bg {
    background: var(--light-gray);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.section h2 {
    text-align: center;
    font-size: 3rem;
    margin-bottom: 60px;
    color: var(--dark-blue);
    font-weight: 700;
    position: relative;
}

.section h2::after {
    content: '';
    position: absolute;
    bottom: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 80px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    border-radius: 2px;
}

/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.intro-paragraph {
    font-size: 1.2rem;
    margin-bottom: 20px;
    color: var(--text-dark);
    line-height: 1.8;
}

.education-info, .experience-info {
    margin-top: 40px;
    padding: 30px;
    background: var(--white);
    border-radius: 15px;
    box-shadow: var(--shadow);
    border-left: 5px solid var(--primary-blue);
}

.education-info h3, .experience-info h3 {
    color: var(--dark-blue);
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.3rem;
}

/* Skills Grid */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 30px;
    margin-top: 60px;
}

.skill-item {
    text-align: center;
    padding: 40px 25px;
    background: var(--white);
    border-radius: 20px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.skill-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
}

.skill-item:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.skill-item i {
    font-size: 3.5rem;
    margin-bottom: 20px;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-green));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.skill-item h3 {
    color: var(--text-dark);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.skill-item p {
    color: var(--text-light);
    font-size: 0.95rem;
}

/* Projects Section - 3 Cards Row Layout */
#projects {
    background: var(--light-gray);
}

.projects-row {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.project-card {
    background: var(--white);
    border-radius: 18px;
    overflow: hidden;
    box-shadow: 0 6px 24px rgba(37, 99, 235, 0.08);
    border: 1px solid rgba(37, 99, 235, 0.08);
    transition: all 0.3s ease;
    position: relative;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: 0 12px 40px rgba(37, 99, 235, 0.12);
}

/* Phân biệt School vs Professional */
.project-card.school {
    border-top: 4px solid #10B981;
}

.project-card.professional {
    border-top: 4px solid #F59E0B;
}

.project-badge {
    padding: 15px 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-card.school .project-badge {
    background: linear-gradient(135deg, #10B981, #059669);
    color: var(--white);
}

.project-card.professional .project-badge {
    background: linear-gradient(135deg, #F59E0B, #D97706);
    color: var(--white);
}

.project-badge i {
    font-size: 1rem;
}

.project-content {
    padding: 25px 20px;
    flex: 1;
    display: flex;
    flex-direction: column;
}

.project-content h3 {
    color: var(--dark-blue);
    font-size: 1.3rem;
    font-weight: 700;
    margin-bottom: 15px;
    line-height: 1.3;
}

.project-description {
    color: var(--text-dark);
    line-height: 1.6;
    margin-bottom: 25px;
    font-size: 0.9rem;
    flex: 1;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-top: auto;
}

.tech-primary {
    background: var(--primary-blue);
    color: var(--white);
    padding: 5px 12px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.tech-item {
    background: rgba(37, 99, 235, 0.08);
    color: var(--primary-blue);
    padding: 5px 10px;
    border-radius: 10px;
    font-size: 0.75rem;
    font-weight: 500;
    transition: all 0.3s ease;
}

.tech-item:hover {
    background: var(--primary-blue);
    color: var(--white);
    transform: translateY(-1px);
}

.project-footer {
    padding: 18px 20px;
    background: rgba(37, 99, 235, 0.02);
    border-top: 1px solid rgba(37, 99, 235, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
    min-height: 60px;
}

.project-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.project-year {
    color: var(--text-light);
    font-size: 0.8rem;
    font-weight: 500;
}

.project-status {
    color: var(--primary-blue);
    font-size: 0.85rem;
    font-weight: 600;
}

.github-link {
    background: var(--dark-blue);
    color: var(--white);
    padding: 8px 15px;
    border-radius: 10px;
    text-decoration: none;
    font-size: 0.8rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 6px;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.3px;
}

.github-link:hover {
    background: #000;
    transform: translateY(-2px);
}

.github-link i {
    font-size: 0.9rem;
}

/* Footer */
footer {
    background: var(--dark-blue);
    color: var(--white);
    text-align: center;
    padding: 50px 0;
}

/* Animations */
@keyframes fadeIn {
    from { 
        opacity: 0; 
        transform: translateY(40px); 
    }
    to { 
        opacity: 1; 
        transform: translateY(0); 
    }
}

@keyframes slideIn {
    from { 
        opacity: 0; 
        transform: translateX(-60px); 
    }
    to { 
        opacity: 1; 
        transform: translateX(0); 
    }
}

.fade-in {
    animation: fadeIn 1.2s ease-out forwards;
}

.slide-in {
    animation: slideIn 1.2s ease-out forwards;
}

/* Contact Section - Dark & Professional */
.contact-section {
    background: linear-gradient(135deg, var(--dark-blue) 0%, var(--black) 100%);
    color: var(--white);
    position: relative;
}

.contact-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 70% 30%, rgba(96, 165, 250, 0.08) 0%, transparent 50%);
    z-index: 1;
}

.contact-section .container {
    position: relative;
    z-index: 2;
}

.contact-header {
    text-align: center;
    margin-bottom: 50px;
}

.contact-header h2 {
    color: var(--white);
    margin-bottom: 15px;
}

.contact-subtitle {
    font-size: 1.1rem;
    color: rgba(255, 255, 255, 0.7);
    max-width: 500px;
    margin: 0 auto;
    line-height: 1.6;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 50px;
    align-items: start;
}

/* Contact Info Side */
.contact-intro {
    margin-bottom: 35px;
}

.contact-intro h3 {
    color: var(--white);
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.contact-intro p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    font-size: 0.95rem;
}

.contact-methods {
    margin-bottom: 35px;
}

.contact-method {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 18px 20px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 12px;
    margin-bottom: 15px;
    transition: all 0.3s ease;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-method:hover {
    background: rgba(255, 255, 255, 0.08);
    transform: translateX(5px);
    border-color: rgba(96, 165, 250, 0.3);
}

.method-icon {
    width: 40px;
    height: 40px;
    background: rgba(96, 165, 250, 0.15);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.method-icon i {
    font-size: 1rem;
    color: var(--primary-blue);
}

.method-content h4 {
    color: var(--white);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.contact-link {
    color: rgba(255, 255, 255, 0.8);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s ease;
}

.contact-link:hover {
    color: var(--primary-blue);
}

/* Student Status */
.student-status {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 15px;
    padding: 25px;
    border: 1px solid rgba(255, 255, 255, 0.08);
}

.status-card {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 20px;
}

.status-icon {
    width: 50px;
    height: 50px;
    background: rgba(96, 165, 250, 0.15);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.status-icon i {
    font-size: 1.2rem;
    color: var(--primary-blue);
}

.status-info h4 {
    color: var(--white);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 5px;
}

.status-info p {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    margin-bottom: 5px;
}

.university {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.8rem;
    font-style: italic;
}

.availability-note {
    display: flex;
    align-items: center;
    gap: 10px;
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.85rem;
    padding: 10px 15px;
    background: rgba(16, 185, 129, 0.1);
    border-radius: 8px;
    border: 1px solid rgba(16, 185, 129, 0.2);
}

.availability-note i {
    color: #10B981;
}

/* CTA Side */
.cta-card {
    background: rgba(255, 255, 255, 0.05);
    border-radius: 20px;
    padding: 35px;
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.08);
    backdrop-filter: blur(10px);
}

.cta-card h3 {
    color: var(--white);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 15px;
}

.cta-card > p {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.6;
    margin-bottom: 30px;
    font-size: 0.95rem;
}

.cta-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.btn.secondary {
    background: transparent;
    color: rgba(255, 255, 255, 0.9);
    border: 2px solid rgba(255, 255, 255, 0.2);
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.4);
    color: var(--white);
}

.quick-facts {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    padding-top: 25px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.fact-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.85rem;
}

.fact-item i {
    color: var(--primary-blue);
    font-size: 0.9rem;
}

/* Responsive updates */
@media (max-width: 1024px) {
    .projects-row {
        grid-template-columns: repeat(2, 1fr);
        gap: 25px;
    }
}

@media (max-width: 768px) {
    .projects-row {
        grid-template-columns: 1fr;
        gap: 20px;
        margin-top: 40px;
    }
    
    .project-content {
        padding: 20px 18px;
    }
    
    .project-content h3 {
        font-size: 1.2rem;
    }
    
    .project-description {
        font-size: 0.85rem;
    }
    
    .project-footer {
        padding: 15px 18px;
        min-height: 55px;
    }
    
    .contact-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .contact-header {
        margin-bottom: 40px;
    }
    
    .contact-subtitle {
        font-size: 1.1rem;
    }
    
    .contact-method {
        padding: 20px;
    }
    
    .method-icon {
        width: 45px;
        height: 45px;
    }
    
    .form-container {
        padding: 30px 25px;
    }
    
    .contact-availability {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    .project-card {
        border-radius: 15px;
    }
    
    .project-badge {
        padding: 12px 15px;
        font-size: 0.8rem;
    }
    
    .project-content {
        padding: 18px 15px;
    }
    
    .tech-stack {
        gap: 4px;
    }
    
    .tech-primary,
    .tech-item {
        font-size: 0.7rem;
        padding: 4px 8px;
    }
    
    .github-link {
        padding: 6px 12px;
        font-size: 0.75rem;
    }
    
    .project-footer {
        padding: 12px 15px;
        flex-direction: column;
        gap: 10px;
        text-align: center;
        min-height: auto;
    }
    
    .contact-method {
        flex-direction: column;
        text-align: center;
        gap: 15px;
        padding: 20px 15px;
    }
    
    .method-icon {
        margin: 0 auto;
    }
    
    .form-container {
        padding: 25px 20px;
    }
    
    .form-group input,
    .form-group select,
    .form-group textarea {
        padding: 10px 14px;
    }
    
    .availability-status {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .response-time {
        justify-content: center;
    }
}

@media (max-width: 360px) {
    .hero {
        padding: 70px 5px 50px 5px;
    }
    
    .profile-photo {
        width: 240px;
        height: 240px;
        margin-top: 5px;
    }
    
    .profile-section::before {
        width: 300px;
        height: 300px;
    }
}

/* Cho màn hình rất lớn */
@media (min-width: 1400px) {
    .hero {
        padding: 140px 20px 120px 20px; /* Thêm không gian cho ảnh lớn */
    }
    
    .hero-content {
        padding-top: 50px;
    }
    
    .profile-section {
        padding-top: 40px;
    }
    
    .profile-photo {
        width: 450px;
        height: 450px;
        margin-top: 30px;
    }
    
    .profile-section::before {
        width: 600px;
        height: 600px;
        top: 60%;
    }
}

/* Responsive cho contact section */
@media (max-width: 768px) {
    .contact-content {
        grid-template-columns: 1fr;
        gap: 35px;
    }
    
    .contact-header {
        margin-bottom: 35px;
    }
    
    .contact-method {
        padding: 15px;
    }
    
    .method-icon {
        width: 35px;
        height: 35px;
    }
    
    .cta-card {
        padding: 25px 20px;
    }
    
    .cta-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .btn {
        width: 100%;
        max-width: 250px;
    }
    
    .quick-facts {
        flex-direction: column;
        gap: 12px;
    }
}

@media (max-width: 480px) {
    .contact-method {
        flex-direction: column;
        text-align: center;
        gap: 10px;
        padding: 15px;
    }
    
    .status-card {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .student-status {
        padding: 20px 15px;
    }
    
    .cta-card {
        padding: 20px 15px;
    }
    
    .availability-note {
        flex-direction: column;
        text-align: center;
        gap: 8px;
    }
}