:root {
    --gentoo-ink: #120d1f;
    --gentoo-ink-soft: #1d1630;
    --gentoo-panel: rgba(255, 255, 255, 0.48);
    --gentoo-panel-soft: rgba(255, 255, 255, 0.34);
    --gentoo-line: rgba(96, 78, 130, 0.2);
    --gentoo-line-strong: rgba(84, 72, 122, 0.34);
    --gentoo-blue: #6f5aa8;      /* Gentoo 品牌紫（#54487A 提亮适配浅色玻璃） */
    --gentoo-blue-soft: #55447f;
    --gentoo-text: #2b2440;
    --gentoo-muted: rgba(75, 66, 98, 0.8);
}

html,
body {
    min-height: 100%;
}

body.gentoo-theme {
    position: relative;
    color: var(--gentoo-text);
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Microsoft YaHei", "Helvetica Neue", Arial, "Noto Sans SC", sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background:
        radial-gradient(circle at 14% 12%, rgba(255, 255, 255, 0.82), transparent 28%),
        radial-gradient(circle at 84% 18%, rgba(178, 158, 214, 0.22), transparent 25%),
        linear-gradient(135deg, #f9f7fc 0%, #ece7f4 42%, #ddd6ea 72%, #f5f2f9 100%);
    background-attachment: fixed;
}

.gentoo-theme h1,
.gentoo-theme h2,
.gentoo-theme h3,
.gentoo-theme h4,
.gentoo-theme h5,
.gentoo-theme h6,
.gentoo-theme .h1,
.gentoo-theme .h2,
.gentoo-theme .h3,
.gentoo-theme .h4,
.gentoo-theme .h5,
.gentoo-theme .h6 {
    font-weight: 600;
    letter-spacing: -0.02em;
}

body.gentoo-theme::before {
    position: fixed;
    inset: 0;
    z-index: -1;
    content: "";
    pointer-events: none;
    opacity: 0.26;
    background-image:
        linear-gradient(rgba(140, 120, 190, 0.06) 1px, transparent 1px),
        linear-gradient(90deg, rgba(140, 120, 190, 0.06) 1px, transparent 1px);
    background-size: 42px 42px;
    mask-image: linear-gradient(to bottom, #000, transparent 72%);
}

.gentoo-theme #body > .container {
    padding-top: 18px;
}

.gentoo-theme .card,
.gentoo-theme .list-group-item,
.gentoo-theme .modal-content,
.gentoo-theme .dropdown-menu,
.gentoo-theme .popover {
    color: var(--gentoo-text);
    position: relative;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(204, 215, 219, 0.36));
    border-color: var(--gentoo-line);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72), 0 22px 48px rgba(69, 82, 88, 0.16);
    backdrop-filter: blur(24px) saturate(135%);
    -webkit-backdrop-filter: blur(24px) saturate(135%);
}

.gentoo-theme .card::before,
.gentoo-theme .modal-content::before,
.gentoo-theme .dropdown-menu::before {
    position: absolute;
    inset: 0;
    content: "";
    pointer-events: none;
    background: linear-gradient(120deg, rgba(255, 255, 255, 0.13), transparent 34%);
}

.gentoo-theme .card-header,
.gentoo-theme .card-footer,
.gentoo-theme .list-group-item + .list-group-item {
    background: rgba(255, 255, 255, 0.38);
    border-color: var(--gentoo-line);
}

.gentoo-theme .card-site-info,
.gentoo-theme .card-threadlist,
.gentoo-theme .card-thread,
.gentoo-theme .card-postlist,
.gentoo-theme .card-user,
.gentoo-theme .card-form {
    border-radius: 16px;
    overflow: hidden;
}

.gentoo-theme .nav-tabs {
    border-bottom-color: var(--gentoo-line);
}

.gentoo-theme .breadcrumb {
    margin-bottom: 16px;
    padding: 10px 14px;
    color: var(--gentoo-muted);
    background: linear-gradient(110deg, rgba(255, 255, 255, 0.58), rgba(201, 216, 221, 0.36)) !important;
    border: 1px solid rgba(77, 103, 118, 0.22) !important;
    border-radius: 10px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.1), 0 10px 24px rgba(3, 8, 22, 0.16);
    backdrop-filter: blur(18px) saturate(130%);
    -webkit-backdrop-filter: blur(18px) saturate(130%);
}

.gentoo-theme .breadcrumb:hover {
    background: linear-gradient(110deg, rgba(255, 255, 255, 0.74), rgba(201, 216, 221, 0.48)) !important;
}

.gentoo-theme .breadcrumb a,
.gentoo-theme .breadcrumb-item.active {
    color: var(--gentoo-blue-soft);
}

.gentoo-theme .breadcrumb a:hover {
    color: #7a5fa8;
    text-decoration: none;
}

.gentoo-theme .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(218, 224, 244, 0.55);
}

.gentoo-theme .nav-tabs .nav-link {
    color: var(--gentoo-muted);
    border-color: transparent;
}

.gentoo-theme .nav-tabs .nav-link:hover,
.gentoo-theme .nav-tabs .nav-link.active {
    color: var(--gentoo-text);
    background: rgba(154, 211, 220, 0.28);
    border-color: var(--gentoo-line) var(--gentoo-line) transparent;
}

.gentoo-theme a {
    color: var(--gentoo-blue-soft);
    text-decoration: none;
    transition: color 0.2s ease;
}

.gentoo-theme a:hover {
    color: #7a5fa8;
    text-decoration: none;
}

.gentoo-theme .text-muted,
.gentoo-theme .text-secondary,
.gentoo-theme .small,
.gentoo-theme .text-white-50 {
    color: var(--gentoo-muted) !important;
}

.gentoo-theme .form-control,
.gentoo-theme .form-select,
.gentoo-theme textarea,
.gentoo-theme input[type="text"],
.gentoo-theme input[type="password"],
.gentoo-theme input[type="email"] {
    color: var(--gentoo-text);
    background: rgba(255, 255, 255, 0.58);
    border-color: var(--gentoo-line);
}

.gentoo-theme .form-control::placeholder,
.gentoo-theme textarea::placeholder {
    color: rgba(67, 82, 91, 0.62);
}

.gentoo-theme .form-control:focus,
.gentoo-theme .form-select:focus,
.gentoo-theme textarea:focus {
    color: var(--gentoo-text);
    background: rgba(255, 255, 255, 0.78);
    border-color: var(--gentoo-blue);
    box-shadow: 0 0 0 0.2rem rgba(105, 182, 255, 0.14);
}

.gentoo-theme .btn-primary {
    color: #20333d;
    background: linear-gradient(135deg, #78aeb9, #b0d1d0);
    border-color: rgba(61, 96, 109, 0.22);
}

.gentoo-theme .btn-secondary,
.gentoo-theme .btn-light,
.gentoo-theme .btn-default {
    color: var(--gentoo-text);
    background: var(--gentoo-panel-soft);
    border-color: var(--gentoo-line);
}

.gentoo-theme .btn-primary:hover,
.gentoo-theme .btn-secondary:hover,
.gentoo-theme .btn-light:hover,
.gentoo-theme .btn-default:hover {
    color: #fff;
    border-color: var(--gentoo-line-strong);
    filter: brightness(1.08);
}

.gentoo-theme .alert {
    color: var(--gentoo-text);
    background: rgba(12, 38, 65, 0.68);
    border-color: var(--gentoo-line);
}

.gentoo-theme .table {
    color: var(--gentoo-text);
    --bs-table-bg: transparent;
    --bs-table-color: var(--gentoo-text);
    --bs-table-border-color: var(--gentoo-line);
}

.gentoo-theme .pagination .page-link {
    color: var(--gentoo-blue-soft);
    background: var(--gentoo-panel-soft);
    border-color: var(--gentoo-line);
}

.gentoo-theme .pagination .active .page-link,
.gentoo-theme .pagination .page-link:hover {
    color: #031522;
    background: var(--gentoo-blue);
    border-color: var(--gentoo-blue);
}

.gentoo-footer {
    margin-top: 36px;
    padding-top: 1.25rem;
    padding-bottom: 1.25rem;
    color: var(--gentoo-muted) !important;
    background: linear-gradient(145deg, rgba(255, 255, 255, 0.62), rgba(204, 215, 219, 0.42)) !important;
    border-top: 1px solid var(--gentoo-line);
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.72), 0 -10px 30px rgba(69, 82, 88, 0.08);
    backdrop-filter: blur(24px) saturate(135%);
    -webkit-backdrop-filter: blur(24px) saturate(135%);
}

.gentoo-footer,
.gentoo-footer * {
    color: var(--gentoo-muted) !important;
}

.gentoo-footer b,
.gentoo-footer strong {
    color: var(--gentoo-text) !important;
}

@media (max-width: 575.98px) {
    .gentoo-theme #body > .container {
        padding-top: 10px;
    }

    .gentoo-theme .card,
    .gentoo-theme .card-site-info,
    .gentoo-theme .card-threadlist,
    .gentoo-theme .card-thread,
    .gentoo-theme .card-postlist,
    .gentoo-theme .card-user,
    .gentoo-theme .card-form {
        border-radius: 12px;
    }
}

/* ---- 帖子内容中的 Quill 2 富文本样式 ---- */
.gentoo-theme .message .ql-code-block-container {
    margin: 0.5rem 0;
    padding: 0.85rem 1rem;
    color: #d7e9ff;
    background: linear-gradient(145deg, #10182b, #1a2440);
    border: 1px solid rgba(120, 160, 190, 0.28);
    border-radius: 10px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 20px rgba(3, 8, 22, 0.22);
    overflow-x: auto;
    font-size: 0.92rem;
}

.gentoo-theme .message .ql-code-block {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
    white-space: pre-wrap;
    line-height: 1.55;
}

.gentoo-theme .message code,
.gentoo-theme .message pre {
    font-family: "SFMono-Regular", Consolas, "Liberation Mono", Menlo, monospace;
}

.gentoo-theme .message pre {
    margin: 0.5rem 0;
    padding: 0.85rem 1rem;
    color: #d7e9ff;
    background: linear-gradient(145deg, #10182b, #1a2440);
    border: 1px solid rgba(120, 160, 190, 0.28);
    border-radius: 10px;
    box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.08), 0 8px 20px rgba(3, 8, 22, 0.22);
    overflow-x: auto;
    white-space: pre-wrap;
    line-height: 1.55;
}

.gentoo-theme .message blockquote {
    margin: 0.5rem 0;
    padding: 0.6rem 0.9rem;
    color: var(--gentoo-blue-soft);
    background: rgba(120, 170, 190, 0.14);
    border-left: 3px solid var(--gentoo-blue);
    border-radius: 0 8px 8px 0;
}

.gentoo-theme .message .ql-align-center {
    text-align: center;
}

.gentoo-theme .message .ql-align-right {
    text-align: right;
}

.gentoo-theme .message .ql-align-justify {
    text-align: justify;
}

.gentoo-theme .message .ql-indent-1 {
    margin-left: 3em;
}

.gentoo-theme .message .ql-indent-2 {
    margin-left: 6em;
}

.gentoo-theme .message .ql-indent-3 {
    margin-left: 9em;
}

/* 帖子操作按钮配色（引用/编辑/删除） */
.gentoo-theme .post_actions a.text-grey,
.gentoo-theme .text-grey {
    color: rgba(160, 180, 200, 0.85);
    transition: color 0.2s ease;
}

.gentoo-theme .post_actions a.text-grey:hover,
.gentoo-theme a.text-grey:hover {
    color: var(--gentoo-blue);
}

/* 点击"引用"后的帖子高亮 */
.gentoo-theme .post.quote {
    box-shadow: 0 0 0 1px rgba(120, 190, 255, 0.5), 0 0 24px rgba(60, 160, 255, 0.18);
    background: linear-gradient(180deg, rgba(120, 190, 255, 0.08), rgba(120, 190, 255, 0.02));
    border-radius: 10px;
    transition: box-shadow 0.25s ease, background 0.25s ease;
}