body {
    font-family: 'Noto Sans JP', 'Poppins', sans-serif;
    background-color: #121212;
    color: #e0e0e0;
    margin: 0;
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    line-height: 1.7;
}

.container {
    max-width: 800px;
    width: 100%;
    background: #1e1e1e;
    border-radius: 16px;
    padding: 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border: 1px solid #333;
    text-align: center;
}

header .profile-img {
    margin-bottom: 20px;
}

header .profile-img img {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    border: 4px solid #444;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

header h1 {
    font-family: 'Poppins', sans-serif;
    font-size: 2.5rem;
    margin: 0;
    color: #ffffff;
    font-weight: 600;
}

header .subtitle {
    font-size: 1.1rem;
    color: #a0a0a0;
    margin-top: 5px;
    font-weight: 300;
}

main section {
    margin-top: 40px;
    text-align: left;
    border-top: 1px solid #333;
    padding-top: 30px;
}

main h2 {
    font-family: 'Poppins', sans-serif;
    font-size: 1.8rem;
    color: #fff;
    margin-bottom: 20px;
    position: relative;
    display: inline-block;
    padding-bottom: 10px;
}

main h2::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 50%;
    height: 3px;
    background: linear-gradient(90deg, #8A2BE2, #4A00E0);
}

.skills .skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: flex-start;
}

.skills .skill-tags span {
    background-color: #333;
    color: #e0e0e0;
    padding: 8px 15px;
    border-radius: 20px;
    font-size: 0.9rem;
    transition: all 0.3s ease;
}

.skills .skill-tags span:hover {
    background-color: #8A2BE2;
    color: #fff;
}

.newsletter-form {
    display: flex;
    margin-top: 20px;
    gap: 10px;
}

.newsletter-form input, .form-group input, .form-group button {
    width: 100%;
    padding: 15px;
    border-radius: 8px;
    border: 1px solid #444;
    background-color: #2a2a2a;
    color: #e0e0e0;
    font-size: 1rem;
}

.newsletter-form input:focus, .form-group input:focus {
    outline: none;
    border-color: #8A2BE2;
    box-shadow: 0 0 0 3px rgba(138, 43, 226, 0.3);
}

.newsletter-form button, .form-group button {
    width: auto;
    white-space: nowrap;
    background: linear-gradient(90deg, #8A2BE2, #4A00E0);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: bold;
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.newsletter-form button:hover, .form-group button:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(138, 43, 226, 0.4);
}

footer {
    margin-top: 50px;
    padding-top: 20px;
    border-top: 1px solid #333;
    color: #777;
    font-size: 0.9rem;
}