styles.css

body {
    font-family: Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #121212;
    color: #ffffff;
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    overflow-x: hidden;
}

* {
    box-sizing: border-box;
}

h2 {
    color: #ffffff;
    font-size: 2.2rem;
    font-weight: 700;
    background: linear-gradient(45deg, rgb(144 144 144 / 50%), rgb(51 51 51 / 50%));
    padding: 0.5em 1em;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
    margin: 2.5em 0 1.5em;
    position: relative;
    overflow: hidden;
}

h2::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(to right, #FF6B6B, #4ECDC4);
}

h3 {
    color: #ffffff;
    font-size: 1.8rem;
    font-weight: 600;
    padding: 0.3em 0.5em;
    border-left: 5px solid #474747;
    background: rgb(155 155 155 / 10%);
    margin: 2em 0 1em;
    box-shadow: 2px 2px 10px rgba(0,0,0,0.1);
}

p {
    margin: 1em 0;
    line-height: 1.6;
}

#about h2{
    margin-top: 0;
}

.title {
    color: #ffffff;
    font-weight: 600;
    padding: 0.3em 0.5em;
    margin: 1.2em 0;
}

.title span{
    background-color: #222;
    text-decoration: none;
}

.title i{
    margin-left: 1rem;
}

.header {
    text-align: center;
    width: 100%;
    transition: 1s;
    background-color: rgba(0, 0, 0, 0.3);
    padding: 20px;
    position: relative;
    z-index: 1;
}

.header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url(images/nav-back.png);
    background-size: cover;
    background-position: center;
    opacity: 0.5;
    z-index: -1;
    transition: 1s;
}

.header:hover::before {
    background-position: bottom;
    opacity: 0.7;
}

.site-title {
    position: relative;
    z-index: 2;
}

.nav {
    position: relative;
    z-index: 2;
}

.nav ul {
    list-style: none;
    padding: 0;
    display: flex;
    justify-content: center;
    gap: 100px;
    flex-wrap: wrap;
}

.nav a {
    color: #ff00ff;
    text-decoration: none;
    display: flex;
    align-items: center;
    gap: 8px;
    position: relative;
    padding: 5px;
}

.nav a i {
    font-size: 1.2em;
    transition: transform 0.3s ease;
}

.nav a span {
    display: inline-block;
    opacity: 0;
    transform: translateX(-10px);
    transition: all 0.15s ease;
    position: absolute;
    left: 100%;
    white-space: nowrap;
    pointer-events: none;
}

.nav a:hover i {
    transform: scale(1.1);
}

.nav a:hover span {
    opacity: 1;
    transform: translateX(5px);
}

.content {
    max-width: 900px;
    width: 100%;
    margin: 40px auto;
    padding: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
}

section {
    width: 100%;
    text-align: center;
}

.project-list {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 20px;
}

.project-item {
    width: 30%;
    height: 280px;
    background-color: #222;
    padding: 15px;
    border-radius: 10px;
    text-align: center;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    position: relative;
    transition: 0.5s;
}

.project-item img {
    width: 100%;
    height: 180px;
    object-fit: cover;
    border-radius: 8px;
    transition: 0.5s;
    margin-bottom: 10px;
}

.project-item:hover img {
    transform: scale(0.9);
    object-fit: contain;
}

.project-title {
    position: absolute;
    bottom: 15px;
    left: 50%;
    transform: translateX(-50%);
    width: calc(100% - 30px);
    text-align: center;
    padding: 5px 0;
    border-radius: 5px;
}

.project-title p {
    margin: 5px 0;
    font-size: 0.9em;
    color: #999;
}

.footer {
    text-align: center;
    background-color: #1e1e1e;
    width: 100%;
}

video.back-video {
    filter: brightness(40%) blur(10px);
}

#bg {
    position: fixed;
    left: 50%;
    top: 50%;
    bottom: auto;
    right: auto;
    min-width: 100%;
    min-height: 100%;
    transform: translateX(-50%) translateY(-50%);
    z-index: -100;
    background-position: center;
    background-size: cover;
    background-repeat: no-repeat;
}

a {
    color: #ffff00;
    text-decoration: underline;
    transition: all 0.3s ease;
}

a:hover {
    color: #00ffff;
}

a.navbar-brand:hover {
    color: #cccccc;
}

.profile-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    max-width: 800px;
    margin: 0 auto;
    /* padding: 2rem; */
}

.profile-info {
    text-align: center;
}

.profile-avatar {
    width: 150px;
    height: 150px;
    border-radius: 25%;
    object-fit: cover;
    /* border: 4px solid rgba(78,205,196,0.5); */
    box-shadow: 0 4px 15px rgba(0,0,0,0.2);
}

.profile-name {
    font-size: 1.5rem;
    font-weight: 600;
    margin: 1rem 0;
    background: linear-gradient(45deg, #FF6B6B, #4ECDC4);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.profile-description {
    font-size: 1.1rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.social-links {
    text-align: center;
    width: 100%;
}

.social-icons {
    display: flex;
    flex-direction: row;
    gap: 20px;
    justify-content: center;
    align-items: center;
}

.social-icon {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1.5rem;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    transition: all 0.3s ease;
    text-decoration: none;
    color: #ffffff;
}

p.social-icon{
    margin: 0;
}

.social-icon:hover {
    background: rgba(78, 205, 196, 0.2);
    transform: translateY(-2px);
}

.social-icon i {
    font-size: 1.2rem;
    color: #4ECDC4;
}

.other img {
    width: 100%;
    border-radius: 2%;
}

/* スマートフォン向けのスタイル調整 */
@media screen and (max-width: 768px) {
    .header {
        padding: 15px 10px;
    }

    .site-title {
        font-size: 1.5rem;
        margin: 0 0 15px 0;
    }

    .nav ul {
        gap: 30px;
    }

    .nav a i {
        font-size: 1.1em;
    }

    .nav a:hover span {
        transform: translateX(3px);
    }

    .content {
        padding: 15px;
        margin: 20px 0;
        width: 100%;
    }

    h2 {
        font-size: 1.8rem;
        padding: 0.4em 0.8em;
        margin: 2em 0 1em;
    }

    h3 {
        font-size: 1.4rem;
        margin: 2em 0 0.8em;
    }

    p {
        margin: 0.8em 0;
    }

    .project-item {
        width: 100%;
        height: 260px;
        padding: 12px;
    }

    .project-item img {
        height: 160px;
    }

    .project-title {
        bottom: 12px;
        width: calc(100% - 24px);
    }

    .social-icons {
        flex-direction: column;
        gap: 15px;
    }
}