/* --- 共通 --- */
html {
    font-size: 16px;
    color: var(--text-color);
    line-height: 1.7;
    font-family: "M PLUS Rounded 1c", sans-serif;
}

body {
    position: relative;
    background-color: var(--bg-color);
    min-height: 100vh;

    &::before {
        content: "";
        position: fixed;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;

        background-image: var(--bg-image);
        background-size: cover;
        background-position: center;
        background-attachment: fixed;

        filter: blur(var(--bg-blur)) brightness(var(--bg-brightness));

        transform: scale(1.1);
        z-index: -2;
    }
}

header {
    width: 100%;
    text-align: center;
    padding: 20px;
    backdrop-filter: blur(10px);

    a {
        color: var(--site-title-color);
    }
}

a {
    text-decoration: none;
}

main {
    max-width: 1200px;
    margin: 0 auto;
}

img {
    width: 100%;
    display: block;
}

h1 {
    font-size: 1.6em;
    margin: 0;
}

h2 {
    line-height: 1;
    font-size: 1.3em;
}

h3 {
    border-bottom: 1px solid var(--text-color);
    padding: 0 5px 5px;
    margin: 0 0 10px;
}

h4 {
    margin: 0 0 10px;
}

ul {
    padding: 0;

    li {
        list-style: none;
    }
}

a {
    color: var(--link-text-color);
}

section {
    margin-bottom: 40px;
    padding: 25px;
    background: var(--bg-section-color);
    border-radius: 10px;
}

footer {
    text-align: center;
    padding: 20px 0;
}

button {
    background-color: transparent;
    border: none;
    cursor: pointer;
    outline: none;
    padding: 0;
    appearance: none;
}

/* --- トップページ --- */
.top {
    display: flex;
    align-items: flex-start;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 25px 25px;
    gap: 15px;
    justify-content: space-between;

    @media (max-width: 912px) {
        flex-direction: column;
    }
}

.side-menu {
    width: 300px;
    flex-shrink: 0;
    position: sticky;
    top: 25px;
    overflow-y: auto;

    @media (max-width: 912px) {
        width: 100%;
        position: static;
        overflow-y: visible;
        order: 2;
    }
}

.session-grid {
    margin: 0 auto;
    display: grid;
    gap: 15px;
    flex-grow: 1;
}

.session-card {
    display: block;
    background-color: var(--bg-section-color);
    border-radius: 10px;
    color: var(--text-color);
    transition: transform 0.2s ease;
    padding: 5px;
}

.card-info {
    padding: 20px;
}

.card-img img {
    aspect-ratio: 16 / 9;
    object-fit: cover;
    object-position: center;
    border-radius: 10px 10px 0 0;
}

.card-title {
    font-size: 1.1em;
}

.session-date {
    margin: 0;
}

.menu {
    padding: 25px;
    background-color: var(--bg-section-color);
    border-radius: 10px;
}

.year {
    display: grid;
    gap: 10px;
    margin-bottom: 20px;

    .filter-btn {
        padding: 10px;
        border: 1px solid var(--button-border-color);
        background-color: var(--button-bg-color);
        color: var(--button-text-color);
    }

    .filter-btn.is-active {
        border: 1px solid var(--button-border-color-active);
        background-color: var(--button-bg-color-active);
        color: var(--button-text-color-active);
    }
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;

    .filter-btn {
        padding: 5px 10px;
        border: 1px solid var(--button-border-color);
        background-color: var(--button-bg-color);
        color: var(--button-text-color);
        border-radius: 50px;
    }

    .filter-btn.is-active {
        border: 1px solid var(--button-border-color-active);
        background-color: var(--button-bg-color-active);
        color: var(--button-text-color-active);
    }
}

.profile {
    padding: 25px;
    background-color: var(--bg-section-color);
    border-radius: 10px;
}

.profile-icon {
    width: 150px;
    border-radius: 50%;
    aspect-ratio: 1 / 1;
    object-fit: cover;
    object-position: center;
    margin: 0 auto;
}

.profile-name {
    text-align: center;
    font-weight: bold;
}

.profile-links {
    display: grid;
    gap: 10px;
    a {
        color: var(--button-text-color);
        background-color: var(--button-bg-color);
        border: 1px solid var(--button-border-color);
        border-radius: 50px;
        display: flex;
        justify-content: center;
        align-items: center;
        height: 40px;
        transition: all 0.2s ease;

        &:hover {
            color: var(--button-text-color-active);
            background-color: var(--button-bg-color-active);
            border: 1px solid var(--button-border-color-active);
        }
    }
}

.empty-message {
    display: none;
    text-align: center;
    padding: 20px;
    flex-grow: 1;
}

.main-section {
    display: flex;

    @media (max-width: 912px) {
        order: 3;
    }
}

/* --- 詳細ページ --- */

.session-detail {
    max-width: 912px;
    padding: 0 25px 25px;
    margin: 0 auto;
}

.system-name {
    font-size: 0.8em;
    padding: 5px 10px;
    background-color: #ccc;
    border-radius: 5px;
    color: var(--system-name-color);
}

.system-name.green {
    background-color: var(--system-name-color-green);
}

.system-name.orange {
    background-color: var(--system-name-color-orange);
}

.system-name.blue {
    background-color: var(--system-name-color-blue);
}

.system-name.purple {
    background-color: var(--system-name-color-purple);
}

.system-name.red {
    background-color: var(--system-name-color-red);
}

.system-name.skyblue {
    background-color: var(--system-name-color-skyblue);
}

.system-name.yellow {
    background-color: var(--system-name-color-yellow);
}

.entry-content {
    margin-bottom: 15px;
}

.session-date {
    color: var(--session-date-color);
}

.fa-clock {
    color: var(--session-date-color);
}

summary {
    cursor: pointer;

}

.memo-inner {
    padding: 0 25px;
}

.memo-list {
    display: grid !important;
    gap: 10px;
}

.entry-links {
    a {
        display: inline-block;
        transform: translateY(0px);
        transition: all 0.2s ease;

        &:hover {
            transform: translateY(-2px);
        }
    }
}

.gallery-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 5px;

    a {
        display: block;
        width: 100%;
        aspect-ratio: 1 / 1;
        overflow: hidden;
        border-radius: 8px;
    }

    img {
        width: 100%;
        height: 100%;
        object-fit: cover;
        transition: transform 0.3s ease;
    }


    a:hover img {
        transform: scale(1.1);
    }
}

.license-text {
    font-size: 0.7em;
    color: var(--license-text-color);
}

.glightbox.is-blur img,
.glightbox.is-spoiler img,
.glightbox.is-r18 img {
    filter: blur(20px);
    opacity: 0.7;
    transition: filter 0.3s;
}

.glightbox.is-r18 img {
    filter: blur(50px) grayscale(1);
}

.glightbox.is-spoiler:hover img,
.glightbox.is-r18:hover img,
.glightbox.is-blur:hover img {
    filter: blur(20px);
    opacity: 0.8;
}

.glightbox.is-blur,
.glightbox.is-spoiler,
.glightbox.is-r18 {
    position: relative;
    display: block;
    overflow: hidden;

    &::before {
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 1;
        color: #fff;
        font-weight: bold;
        font-size: 0.9rem;
        padding: 5px 10px;
        background: rgba(0, 0, 0, 0.4);
        border-radius: 4px;
        white-space: nowrap;
        pointer-events: none;
    }
}

.glightbox.is-blur::before {
    content: "\f070　ワンクッション";
    font-family: "Font Awesome 7 Free";

}

.glightbox.is-spoiler::before {
    content: "\f070　ネタバレ注意";
    font-family: "Font Awesome 7 Free";
}

.glightbox.is-r18::before {
    content: "\f070　成人向け";
    font-family: "Font Awesome 7 Free";

    background: rgba(150, 0, 0, 0.6);
}

.gnext,
.gprev {
    display: none !important;
}

/* アニメーション */
.fade-in {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
    backface-visibility: hidden;
}

.fade-in.is-visible {
    opacity: 1;
    transform: translateY(0);
}