html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100vh;
    font-family: 'Inter', sans-serif;
    background: #f5f5f5;
}

.header {
    background: linear-gradient(135deg, #002147 0%, #003366 35%, #004080 100%);
    padding: 1.5rem 2rem;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-container {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    max-width: 1200px;
    margin: 0 auto;
}

.logo {
    width: 40px;
    height: 40px;
    filter: brightness(0) invert(1);
}

.name {
    font-size: 2rem;
    font-weight: 500;
    color: #ffffff;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.main-content {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 2rem;
}

.profile-section {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    overflow: hidden;
}

.profile-image {
    width: 100%;
    height: 300px;
    object-fit: cover;
}

.profile-info {
    padding: 1.5rem;
}

.profile-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: #002147;
    margin: 0 0 0.5rem 0;
}

.profile-subtitle {
    font-size: 1rem;
    color: #666;
    margin-bottom: 1rem;
    line-height: 1.4;
}

.contact-info {
    font-size: 0.9rem;
    color: #444;
    margin-top: 1.5rem;
}

.contact-info p {
    margin: 0.5rem 0;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-info i {
    width: 20px;
    color: #004080;
}

.nav-menu {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    margin-top: 1rem;
    overflow: hidden;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.5rem;
    color: #444;
    text-decoration: none;
    border-bottom: 1px solid #eee;
    transition: all 0.3s ease;
}

.nav-link:hover {
    background: #f8f9fa;
    color: #004080;
}

.nav-link.active {
    background: #e7f0f7;
    color: #004080;
    font-weight: 500;
}

.nav-link i {
    width: 20px;
}

.content-section {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    padding: 2rem;
}

.section-title {
    font-size: 1.5rem;
    color: #002147;
    margin: 0 0 1.5rem 0;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #004080;
}

.content-section p {
    color: #444;
    line-height: 1.6;
    margin: 0;
}

.home-grid {
    display: grid;
    gap: 2rem;
    margin-top: 1rem;
}

.profile-card {
    background: white;
    border-radius: 20px;
    padding: 2.5rem;
    box-shadow: 0 10px 30px rgba(0, 33, 71, 0.1);
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.profile-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(0, 33, 71, 0.05) 0%, rgba(0, 64, 128, 0.05) 100%);
    clip-path: circle(0% at 0% 0%);
    transition: clip-path 0.6s ease-in-out;
}

.profile-card:hover::before {
    clip-path: circle(150% at 0% 0%);
}

.profile-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 33, 71, 0.15);
}

.intro-name {
    font-size: 2.5rem;
    background: linear-gradient(135deg, #002147 0%, #004080 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin: 0 0 1.5rem 0;
    font-weight: 700;
    position: relative;
    display: inline-block;
}

.intro-name::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 60px;
    height: 3px;
    background: linear-gradient(90deg, #002147, #004080);
    transition: width 0.3s ease;
}

.profile-card:hover .intro-name::after {
    width: 100%;
}

.role-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.role-card {
    background: white;
    padding: 1rem;
    border-radius: 15px;
    box-shadow: 0 4px 15px rgba(0, 33, 71, 0.08);
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.role-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 4px;
    height: 0;
    background: linear-gradient(to bottom, #002147, #004080);
    transition: height 0.3s ease;
}

.role-card:hover::before {
    height: 100%;
}

.role-card:hover {
    transform: translateX(5px);
    box-shadow: 0 6px 20px rgba(0, 33, 71, 0.12);
}

.role-text {
    color: #004080;
    font-weight: 500;
    font-size: 1rem;
    margin-left: 0.5rem;
}

.institution-card {
    background: linear-gradient(135deg, #fff 0%, #f8f9fa 100%);
    padding: 1.5rem;
    border-radius: 15px;
    margin: 1.5rem 0;
    box-shadow: 0 5px 15px rgba(0, 33, 71, 0.08);
    border: 1px solid rgba(0, 33, 71, 0.1);
}

.institution-info p {
    color: #444;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
    padding-left: 1rem;
    position: relative;
}

.institution-info p::before {
    content: '•';
    position: absolute;
    left: 0;
    color: #004080;
}

.qualifications-card {
    background: white;
    padding: 1.5rem;
    border-radius: 15px;
    margin-bottom: 1.5rem;
    box-shadow: 0 5px 15px rgba(0, 33, 71, 0.08);
    border: 1px solid rgba(0, 33, 71, 0.1);
    position: relative;
    overflow: hidden;
}

.qualifications-card::after {
    content: '🎓';
    position: absolute;
    right: -20px;
    bottom: -20px;
    font-size: 5rem;
    opacity: 0.1;
    transform: rotate(-15deg);
    transition: all 0.3s ease;
}

.qualifications-card:hover::after {
    transform: rotate(0deg);
    opacity: 0.15;
}

.qualifications p {
    color: #004080;
    font-weight: 500;
    margin-bottom: 0.8rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.contact-card {
    background: white;
    padding: 1rem 1.5rem;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 33, 71, 0.08);
    display: flex;
    align-items: center;
    gap: 1rem;
    transition: all 0.3s ease;
}

.contact-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 20px rgba(0, 33, 71, 0.12);
}

.contact-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, #e7f0f7 0%, #f8f9fa 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.contact-icon i {
    color: #004080;
    font-size: 1.2rem;
}

.contact-text {
    flex: 1;
    color: #444;
    font-size: 0.9rem;
}

.education-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    padding: 0.5rem;
}

.education-item {
    background: white;
    border-radius: 15px;
    position: relative;
    overflow: hidden;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 10px 30px rgba(0, 33, 71, 0.1);
}

.education-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 5px;
    background: linear-gradient(90deg, #002147, #004080, #0060a0);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.4s cubic-bezier(0.4, 0, 0.2, 1);
}

.education-item:hover {
    transform: translateY(-10px);
    box-shadow: 0 20px 40px rgba(0, 33, 71, 0.15);
}

.education-item:hover::before {
    transform: scaleX(1);
}

.education-content {
    padding: 2rem;
    position: relative;
    z-index: 1;
}

.education-content::before {
    content: '🎓';
    position: absolute;
    top: -10px;
    right: -10px;
    font-size: 4rem;
    opacity: 0.1;
    transform: rotate(15deg);
    transition: all 0.4s ease;
}

.education-item:hover .education-content::before {
    opacity: 0.2;
    transform: rotate(0deg) scale(1.1);
}

.education-degree {
    font-size: 1.25rem;
    font-weight: 600;
    color: #002147;
    margin-bottom: 1rem;
    position: relative;
    padding-bottom: 0.5rem;
}

.education-degree::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50px;
    height: 2px;
    background: linear-gradient(90deg, #004080, transparent);
    transition: width 0.3s ease;
}

.education-item:hover .education-degree::after {
    width: 100%;
}

.education-school {
    font-size: 1.1rem;
    color: #004080;
    margin-bottom: 1rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.education-school::before {
    content: '📍';
    font-size: 1rem;
}

.education-year {
    color: #666;
    font-size: 0.95rem;
    margin-bottom: 0.75rem;
}

.education-grade {
    display: inline-block;
    background: linear-gradient(135deg, #e7f0f7, #f8f9fa);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    color: #004080;
    font-weight: 500;
    box-shadow: 0 2px 8px rgba(0, 64, 128, 0.1);
    transform: translateY(0);
    transition: all 0.3s ease;
}

.education-item:hover .education-grade {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 64, 128, 0.15);
}

.gold-medal {
    display: inline-block;
    margin-left: 0.5rem;
    color: #ffd700;
    animation: shine 2s infinite;
}

@keyframes shine {
    0% { transform: scale(1) rotate(0deg); opacity: 0.5; }
    50% { transform: scale(1.2) rotate(15deg); opacity: 1; }
    100% { transform: scale(1) rotate(0deg); opacity: 0.5; }
}

/* Research cards styling */
.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}

.research-card {
    background: linear-gradient(180deg, #ffffff 0%, #fbfdff 100%);
    border-radius: 14px;
    padding: 1.25rem;
    position: relative;
    overflow: hidden;
    box-shadow: 0 12px 30px rgba(2, 40, 80, 0.08);
    transition: transform 0.35s cubic-bezier(.2,.8,.2,1), box-shadow 0.35s ease;
    border: 1px solid rgba(0,33,71,0.06);
}

.research-card::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 6px;
    background: linear-gradient(90deg, #002147, #004080 60%, #0060a0);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.35s ease;
}

.research-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 28px 60px rgba(2, 40, 80, 0.12);
}

.research-card:hover::before {
    transform: scaleX(1);
}

.research-content { padding: 0.5rem 0 0 0; }

.research-badge {
    position: absolute;
    left: 1rem;
    top: 0.6rem;
    background: #004080;
    color: #fff;
    width: 36px;
    height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    box-shadow: 0 6px 18px rgba(0,64,128,0.12);
}

.research-title {
    margin: 0 0 0.5rem 0;
    padding-left: 56px; /* room for badge */
    font-size: 1.05rem;
    color: #002147;
    font-weight: 600;
    line-height: 1.3;
}

.research-meta {
    padding-left: 56px;
    color: #555;
    font-size: 0.92rem;
    margin-bottom: 0.6rem;
}

.research-links {
    padding-left: 56px;
    display: flex;
    gap: 0.6rem;
}

.research-pill {
    background: #e7f0f7;
    color: #004080;
    padding: 0.25rem 0.6rem;
    border-radius: 999px;
    font-size: 0.85rem;
}

@media (max-width: 768px) {
    .research-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
    .education-grid {
        grid-template-columns: 1fr;
    }
    .main-content {
        grid-template-columns: 1fr;
    }
    
    .header-container {
        flex-direction: column;
        text-align: center;
    }
    
    .name {
        font-size: 1.5rem;
    }
    
    .profile-image {
        height: 250px;
    }
    
    .nav-menu {
        margin-bottom: 1rem;
    }
}

/* --- Skills & Experience Card Styles --- */
.skills-wrap { margin-top: 0.5rem; }
.skills-grid {
    display: grid;
    grid-template-columns: 1fr 420px;
    gap: 1.5rem;
}
.skills-col, .experience-col { padding: 0.25rem; }
.sub-title { color: #002147; margin: 0 0 0.4rem 0; font-weight: 600; }
.muted { color: #666; font-size: 0.95rem; margin-bottom: 0.75rem; }

.skills-list {
    display: grid;
    gap: 0.95rem;
}
.skill-card {
    background: linear-gradient(180deg, #ffffff, #fbfdff);
    border-radius: 12px;
    padding: 0.9rem 1rem;
    color: #003049;
    font-weight: 600;
    box-shadow: 0 12px 28px rgba(2, 40, 80, 0.06);
    border: 1px solid rgba(0,33,71,0.06);
    transition: transform 0.32s cubic-bezier(.2,.8,.2,1), box-shadow 0.32s;
    cursor: default;
    display: flex;
    align-items: center;
}
.skill-card:hover {
    transform: translateY(-8px) rotate(-0.25deg);
    box-shadow: 0 28px 60px rgba(2, 40, 80, 0.12);
}

.experience-list { display: flex; flex-direction: column; gap: 1rem; }
.experience-card {
    background: linear-gradient(180deg, #ffffff 0%, #f6fbff 100%);
    border-radius: 12px;
    padding: 1rem 1rem;
    box-shadow: 0 14px 34px rgba(2, 40, 80, 0.07);
    border: 1px solid rgba(0,33,71,0.06);
    transition: transform 0.32s, box-shadow 0.32s;
}
.experience-card:hover { transform: translateY(-8px); box-shadow: 0 30px 70px rgba(2,40,80,0.12); }
.exp-header { display: flex; justify-content: space-between; align-items: baseline; gap: 0.5rem; }
.exp-title { font-weight: 700; color: #002147; }
.exp-duration { font-size: 0.9rem; color: #004080; font-weight: 600; }
.exp-role { margin-top: 0.4rem; color: #004080; font-weight: 600; }
.exp-meta { color: #555; margin-top: 0.35rem; font-size: 0.95rem; }
.exp-body { margin-top: 0.6rem; color: #444; line-height: 1.5; }
.experience-summary { margin-top: 0.6rem; color: #444; font-weight: 600; }

/* Responsive fallback: stack columns on small screens */
@media (max-width: 900px) {
    .skills-grid { grid-template-columns: 1fr; }
}

/* Two-column skills layout and highlights */
.skills-list.two-col {
    grid-template-columns: repeat(2, minmax(220px, 1fr));
    gap: 0.85rem;
}
.featured-badge {
    display: inline-block;
    background: linear-gradient(90deg,#ffefc3,#ffd27a);
    color: #4a2b00;
    padding: 0.15rem 0.55rem;
    margin-left: 0.8rem;
    font-size: 0.8rem;
    border-radius: 999px;
    vertical-align: middle;
    box-shadow: 0 6px 18px rgba(255,180,20,0.12);
    font-weight: 700;
}
.featured-mini {
    display: inline-block;
    background: #e7f0f7;
    color: #004080;
    padding: 0.12rem 0.45rem;
    margin-left: 0.5rem;
    font-size: 0.78rem;
    border-radius: 999px;
    font-weight: 600;
}

.skill-card.highlight {
    background: linear-gradient(180deg,#fffaf0,#fff4e6);
    border: 1px solid rgba(255,160,40,0.16);
    box-shadow: 0 18px 40px rgba(255,160,40,0.06);
    color: #3b2b00;
}

.experience-section { margin-top: 1.25rem; }
.experience-card.highlight {
    background: linear-gradient(90deg,#eaf6ff,#f6fbff);
    border: 1px solid rgba(0,100,180,0.12);
    box-shadow: 0 36px 80px rgba(0,80,160,0.08);
    /* do not set a static transform here so hover animations still apply */
}

@media (max-width: 900px) {
    .skills-list.two-col { grid-template-columns: 1fr; }
}