:root {
    color-scheme: dark;
}
body {
    background-color: #121212;
    color: #e0e0e0;
    font-family: 'Segoe UI', Arial, sans-serif;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}
header {
    background: linear-gradient(135deg, #000000, #1e1e1e, #6a11cb);
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.6);
}
.profile-photo {
    width: 130px;
    height: 130px;
    border-radius: 50%;
    background-color: #ffffff;
    border: 4px solid #ffeb3b;
    overflow: hidden;
    transition: transform 0.3s ease;
}
.profile-photo:hover {
    transform: scale(1.05);
}
.nav-link-custom {
    color: #ffffff;
    font-weight: bold;
    text-decoration: none;
    margin: 0 10px;
    transition: color 0.3s, border-bottom 0.3s;
    cursor: pointer;
    border-bottom: 2px solid transparent;
}
.nav-link-custom:hover,
.nav-link-custom.active {
    color: #ffeb3b !important;
    border-bottom: 2px solid #ffeb3b;
}
.custom-card {
    background: #1e1e1e;
    border: none;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
    transition: transform 0.3s, box-shadow 0.3s;
}
.custom-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 25px rgba(106, 17, 203, 0.3);
}
.box-skill {
    background: linear-gradient(135deg, #2c2c2c, #4a148c);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    transition: transform 0.3s;
}
.box-skill:hover {
    transform: scale(1.03);
}
.form-control,
.form-control:focus {
    background-color: #2c2c2c;
    border: 1px solid #444;
    color: #ffffff;
}
.form-control:focus {
    box-shadow: 0 0 0 0.25rem rgba(106, 17, 203, 0.5);
    border-color: #6a11cb;
}
.btn-custom {
    background-color: #2575fc;
    color: white;
    font-weight: bold;
    transition: background 0.3s;
}
.btn-custom:hover {
    background-color: #6a11cb;
    color: white;
}
footer {
    background-color: #1e1e1e;
    margin-top: auto;
}