.gd-body { width: 100%; }

.gd-page {
    padding: 6em 5% calc(195px + 2em);
    background: var(--dark) url('../img/darknoise.svg') repeat;
    min-height: 100vh;
    box-sizing: border-box;
    flex: 0 0 auto;
}
.gd-page > h1 {
    font-size: 2em;
    text-align: center;
    margin-bottom: 1em;
}

.gd-layout {
    display: flex;
    align-items: flex-start;
    gap: 2em;
    max-width: 1100px;
    margin: 0 auto;
}

.gd-tabs {
    flex: 0 0 13em;
    position: sticky;
    top: 6em;
    display: flex;
    flex-direction: column;
}
.gd-tabs a {
    display: block;
    padding: 0.55em 0.9em;
    color: var(--lightest);
    text-decoration: none;
    font-family: var(--header-font);
    font-size: 1.15em;
    letter-spacing: 1px;
    border-left: 3px solid transparent;
}
.gd-tabs a:hover { color: #fff; border-left-color: #555; }
.gd-tabs a.on { border-left-color: var(--accent); color: #fff; }

.gd-sub { display: none; padding: 0.1em 0 0.4em 0.9em; }
.gd-sub.open { display: block; }
.gd-tabs .gd-sub a {
    font-family: var(--serif-font);
    font-size: 1em;
    letter-spacing: 0;
    padding: 0.3em 0.9em;
    color: #bbb;
}
.gd-tabs .gd-sub a.on { color: #fff; }

.gd-content { flex: 1 1 auto; min-width: 0; }

.gd-panel {
    display: none;
    background: var(--lightest);
    color: var(--dark);
    font-family: var(--serif-font);
    font-size: 1.1em;
    line-height: 1.55em;
    padding: 2em 2.4em;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.35);
}
.gd-panel.on { display: block; }

.gd-panel h2 {
    font-family: var(--header-font);
    font-size: 1.9em;
    letter-spacing: 1px;
    color: var(--accent);
    margin: 0 0 0.7em;
    line-height: 1.2em;
}
.gd-panel h3 {
    font-family: var(--header-font);
    font-size: 1.35em;
    letter-spacing: 1px;
    color: var(--dark);
    margin: 1.4em 0 0.5em;
    line-height: 1.2em;
}
.gd-panel h4 {
    font-family: var(--serif-font);
    font-weight: bold;
    font-size: 1.05em;
    margin: 1em 0 0.3em;
}
.gd-panel p { margin: 0 0 0.8em; }
.gd-panel ul { margin: 0 0 0.8em 1.3em; list-style: disc; }
.gd-panel li { margin-bottom: 0.25em; }
.gd-panel strong { font-weight: bold; }
.gd-panel em { font-style: italic; }
.gd-muted { color: #777; font-style: italic; }

.gd-skin-list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5em;
    margin-top: 1em;
}
.gd-skin-list a {
    padding: 0.35em 0.9em;
    border: 1px solid var(--dark);
    color: var(--dark);
    text-decoration: none;
    font-family: var(--header-font);
    letter-spacing: 1px;
}
.gd-skin-list a:hover { background: var(--dark); color: var(--lightest); }

.gd-stats {
    display: flex;
    gap: 0.5em;
    margin: 1.2em 0 0.4em;
}
.gd-stats div {
    flex: 1 1 0;
    border: 1px solid var(--dark);
    padding: 0.35em 0.2em;
    text-align: center;
    font-family: var(--body-font);
    font-weight: 600;
    font-size: 1.05em;
    line-height: 1.2em;
}
.gd-stats span {
    display: block;
    font-size: 0.65em;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: #777;
}

.gd-skin { position: relative; overflow: hidden; }
.gd-banner {
    position: absolute;
    top: 1.9em;
    left: -3.4em;
    width: 13em;
    padding: 0.35em 0;
    transform: rotate(-45deg);
    background: var(--accent);
    color: var(--lightest);
    font-family: var(--header-font);
    font-size: 0.85em;
    letter-spacing: 2px;
    text-transform: uppercase;
    text-align: center;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.4);
    z-index: 2;
}
.gd-off h2 { padding-left: 2.6em; }

.gd-set { margin: 1em 0 -0.6em; font-style: italic; color: #777; }

.gd-move { border-top: 1px solid #ddd; }
.gd-move:first-of-type { border-top: none; }
.gd-move h4 { margin-top: 0.8em; }

@media (max-width: 760px) {
    .gd-page { padding: 6em 16px calc(117px + 1em); }
    .gd-layout { flex-direction: column; gap: 1em; }
    .gd-tabs {
        position: static;
        flex: none;
        width: 100%;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 0.2em 0;
    }
    .gd-tabs a { border-left: none; border-bottom: 3px solid transparent; padding: 0.4em 0.7em; }
    .gd-tabs a:hover { border-left-color: transparent; border-bottom-color: #555; }
    .gd-tabs a.on { border-bottom-color: var(--accent); }
    .gd-sub, .gd-sub.open { display: none; }
    .gd-content { width: 100%; }
    .gd-panel { padding: 1.4em 1.2em; font-size: 1em; }
    .gd-stats { flex-wrap: wrap; }
    .gd-stats div { flex: 1 1 4em; }
}