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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
        Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #0d1117;
    color: #e6edf3;
    line-height: 1.6;
    overflow-x: hidden;
}

body::before {
    content: "";
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(ellipse at top, #1a2332 0%, #0d1117 50%);
    z-index: -1;
}

.main-header {
    text-align: center;
    padding: 100px 20px 70px;
}

.main-header p {
    font-size: 1.2rem;
    color: #8b949e;
    font-weight: 400;
}

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px 100px;
}

.team-section {
    margin-bottom: 90px;
}

.section-title {
    font-size: 2rem;
    color: #f0f6fc;
    margin-bottom: 50px;
    text-align: center;
    font-weight: 600;
    position: relative;
    padding-bottom: 35px;
}

/* tube light effect below section title */
.section-title::after {
    content: "";
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 150px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2, #f093fb);
    border-radius: 2px;
    box-shadow: 0 8px 25px rgba(102, 126, 234, 0.5),
        0 15px 40px rgba(118, 75, 162, 0.3),
        0 20px 50px rgba(240, 147, 251, 0.2);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 28px;
}


.member-card {
    background: rgba(22, 27, 34, 0.6);
    border: 2px solid #30363d;
    border-radius: 12px;
    padding: 32px 24px;
    text-align: center;
    transition: transform 0.3s, box-shadow 0.5s;
    position: relative;
    backdrop-filter: blur(8px);
}

/* animated gradient border on hover */
.member-card::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 12px;
    padding: 2px;
    background: linear-gradient(45deg, #667eea, #764ba2, #f093fb, #f5576c, #4facfe, #667eea);
    background-size: 300% 300%;
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    opacity: 0;
    transition: opacity 0.3s;
}

.member-card:hover::before {
    opacity: 1;
    animation: borderMove 3s linear infinite;
}

@keyframes borderMove {
    0% {
        background-position: 0% 50%;
    }

    100% {
        background-position: 300% 50%;
    }
}

.member-card:hover {
    transform: translateY(-8px);
    animation: showShadow 1.5s forwards;
}

@keyframes showShadow {
    0% {
        box-shadow: none;
    }

    100% {
        box-shadow: 0 12px 40px rgba(102, 126, 234, 0.2),
            0 0 0 1px rgba(118, 75, 162, 0.1);
    }
}

.profile-photo {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    margin: 0 auto 22px;
    border: 3px solid #30363d;
    object-fit: cover;
    transition: border-color 0.3s, transform 0.3s;
}

.member-card:hover .profile-photo {
    border-color: #667eea;
    transform: scale(1.05);
}

.member-name {
    font-size: 1.25rem;
    color: #f0f6fc;
    font-weight: 600;
    margin-bottom: 6px;
}

.member-position {
    font-size: 0.95rem;
    color: #7d8590;
    margin-bottom: 20px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.3s, transform 0.3s;
}

.member-card:hover .social-links {
    opacity: 1;
    transform: translateY(0);
}

.social-links a {
    width: 36px;
    height: 36px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background: #21262d;
    border: 1px solid #30363d;
    border-radius: 6px;
    color: #8b949e;
    text-decoration: none;
    transition: all 0.2s;
}

.social-links a:hover {
    background: #667eea;
    border-color: #667eea;
    color: #fff;
    transform: translateY(-3px);
}

/* looping particles on hover */
.particle-effect {
    position: absolute;
    width: 6px;
    height: 6px;
    /* background: #667eea; */
    border-radius: 50%;
    pointer-events: none;
    opacity: 0;
}

.member-card:hover .particle-effect {
    animation: particleLoop 2.5s ease-in-out infinite;
}

@keyframes particleLoop {
    0% {
        opacity: 0;
        transform: translate(0, 0) scale(0);
    }

    15% {
        opacity: 1;
    }

    85% {
        opacity: 1;
    }

    100% {
        opacity: 0;
        transform: translate(var(--px), var(--py)) scale(1.5);
    }
}

.particle-effect:nth-child(1) {
    background-color: #4facfe;
    top: 15%;
    left: 20%;
    --px: -25px;
    --py: -35px;
}

.particle-effect:nth-child(2) {
    background-color: #f093fb;
    top: 25%;
    right: 25%;
    --px: 30px;
    --py: -40px;
    animation-delay: 0.8s;
}

.particle-effect:nth-child(3) {
    background-color: #f5576c;
    bottom: 30%;
    left: 30%;
    --px: -20px;
    --py: 35px;
    animation-delay: 1.6s;
}

@media (max-width: 1024px) {
    .team-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 24px;
    }

    .main-title {
        font-size: 5vw;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

@media (max-width: 640px) {
    .team-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .main-header {
        padding: 70px 20px 50px;
    }

    .main-title {
        font-size: 8vw;
    }

    .main-header p {
        font-size: 1rem;
    }

    .section-title {
        font-size: 1.5rem;
        margin-bottom: 35px;
    }

    .member-card {
        padding: 28px 20px;
    }

    .profile-photo {
        width: 110px;
        height: 110px;
    }

    .member-name {
        font-size: 1.1rem;
    }
}

.main-title {
    font-size: 4vw;
    font-weight: 800;
    margin-bottom: 20px;
    background: linear-gradient(135deg,
            #667eea 0%,
            #764ba2 25%,
            #f093fb 50%,
            #f5576c 75%,
            #4facfe 100%);
    background-size: 300% 300%;
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    animation: colorShift 10s ease infinite;
    position: relative;
}

@keyframes colorShift {
    0% {
        background-position: 0% 50%;
    }

    50% {
        background-position: 100% 50%;
    }

    100% {
        background-position: 0% 50%;
    }
}

.title-underline {
    content: "";
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 4px;
    background: linear-gradient(90deg, #667eea, #764ba2);
    box-shadow: 0px 0px 8px rgba(102, 126, 234, 0.3);
    border-radius: 2px;
    animation: glow 2s ease-in-out infinite;
}

@keyframes glow {

    0%,
    100% {
        opacity: 1;
        transform: translateX(-50%) scaleX(1);
    }

    50% {
        opacity: 0.7;
        transform: translateX(-50%) scaleX(1.2);
    }
}