:root {
    --bg: #eef3f8;
    --bg-deep: #dce7ef;
    --panel: rgba(255, 255, 255, 0.58);
    --panel-strong: rgba(255, 255, 255, 0.76);
    --panel-dark: rgba(33, 40, 49, 0.72);
    --text: #25303a;
    --text-muted: #667582;
    --text-dim: #8a98a4;
    --accent: #d76692;
    --accent-2: #5e9ebc;
    --accent-3: #d9aa56;
    --border: rgba(255, 255, 255, 0.62);
    --border-dark: rgba(78, 93, 110, 0.18);
    --shadow: 0 24px 70px rgba(65, 83, 101, 0.16);
    --font: SimSun, "宋体", "Times New Roman", Times, serif;
    --radius: 8px;
    --radius-sm: 6px;

    /* Safe area insets (mobile notch/status bar) */
    --sat: env(safe-area-inset-top, 0px);
    --sar: env(safe-area-inset-right, 0px);
    --sab: env(safe-area-inset-bottom, 0px);
    --sal: env(safe-area-inset-left, 0px);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    font-size: 15px;
    overflow-x: hidden;
    max-width: 100vw;
}

body {
    font-family: var(--font);
    background:
        radial-gradient(circle at 15% 8%, rgba(255, 211, 224, 0.75), transparent 30rem),
        radial-gradient(circle at 88% 18%, rgba(165, 213, 229, 0.72), transparent 28rem),
        linear-gradient(135deg, #f5f7fb 0%, #e6edf4 45%, #f7edf1 100%);
    color: var(--text);
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    line-height: 1.65;
    overflow-x: hidden;
    max-width: 100vw;
    padding-top: var(--sat);
    padding-right: var(--sar);
    padding-bottom: var(--sab);
    padding-left: var(--sal);
}

body::before {
    content: "";
    position: fixed;
    inset: 0;
    pointer-events: none;
    background-image:
        linear-gradient(rgba(255,255,255,0.24) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.22) 1px, transparent 1px);
    background-size: 48px 48px;
    mask-image: linear-gradient(to bottom, rgba(0,0,0,0.36), transparent 75%);
    z-index: -3;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color .18s ease, transform .18s ease, border-color .18s ease, background .18s ease;
}

a:hover {
    color: #b84e78;
}

a,
button,
[role="button"] {
    -webkit-tap-highlight-color: rgba(215, 102, 146, .14);
    touch-action: manipulation;
}

a:active,
button:active,
[role="button"]:active {
    opacity: .78;
    transform: scale(.985);
    transition-duration: .04s;
}

.site-backdrop {
    position: fixed;
    inset: 0;
    overflow: hidden;
    pointer-events: none;
    z-index: -2;
}

.aurora {
    position: absolute;
    width: 28rem;
    height: 28rem;
    border-radius: 999px;
    filter: blur(30px);
    opacity: .34;
}

.aurora-one {
    left: -8rem;
    top: 12rem;
    background: #f3abc4;
}

.aurora-two {
    right: -10rem;
    top: 4rem;
    background: #7dc7df;
}

.aurora-three {
    right: 20%;
    bottom: -12rem;
    background: #f1d58f;
}

.glass-panel,
.card,
.wiki-sidebar,
.wiki-content,
.chat-container,
.file-list,
.auth-card,
.admin-section {
    background: var(--panel);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    backdrop-filter: blur(22px);
    -webkit-backdrop-filter: blur(22px);
    border-radius: var(--radius);
}

.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    background: rgba(255, 255, 255, 0.58);
    border-bottom: 1px solid rgba(255,255,255,0.64);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
}

.nav-inner {
    max-width: 1180px;
    margin: 0 auto;
    padding: 0 1.25rem;
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
}

.nav-brand {
    display: inline-flex;
    align-items: center;
    gap: .65rem;
    color: var(--text) !important;
    font-weight: 700;
    letter-spacing: 0;
}

.brand-mark {
    width: 34px;
    height: 34px;
    display: grid;
    place-items: center;
    border-radius: 50%;
    background: linear-gradient(135deg, #222831, #596b7a);
    color: #f8c7d8;
    font-family: "Times New Roman", Times, serif;
    box-shadow: 0 10px 30px rgba(40, 48, 58, .18);
}

.brand-text {
    font-size: 1.02rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: .55rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.nav-search {
    display: flex;
    align-items: center;
}

.mobile-top-search {
    display: none;
}

.nav-search input {
    width: 128px;
    min-height: 34px;
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 999px;
    background: rgba(255,255,255,.52);
    color: var(--text);
    font-family: var(--font);
    font-size: .88rem;
    padding: .35rem .75rem;
    outline: none;
}

.nav-search input:focus {
    width: 170px;
    border-color: rgba(215,102,146,.5);
}

.nav-link,
.nav-user {
    color: var(--text-muted) !important;
    font-size: .92rem;
    padding: .42rem .7rem;
    border-radius: 999px;
}

.nav-link:hover,
.nav-login {
    color: var(--text) !important;
    background: rgba(255,255,255,.55);
}

.nav-admin {
    color: #9a6c19 !important;
}

.nav-user {
    color: var(--accent) !important;
}

.main-content {
    flex: 1;
    max-width: 1180px;
    margin: 0 auto;
    padding: 2rem 1.25rem 3rem;
    width: 100%;
    min-width: 0;
}

.footer {
    text-align: center;
    padding: 1.4rem 1rem 1.8rem;
    color: var(--text-dim);
    font-size: .86rem;
}

.footer-sep {
    margin: 0 .45rem;
    color: rgba(102,117,130,.55);
}

.home-shell {
    display: grid;
    grid-template-columns: 320px 1fr;
    gap: 1.25rem;
    align-items: start;
    min-width: 0;
}

.profile-card {
    position: sticky;
    top: 86px;
    overflow: hidden;
    padding: 0 1.25rem 1.25rem;
    min-width: 0;
}

.profile-cover {
    height: 118px;
    margin: 0 -1.25rem;
    background:
        linear-gradient(135deg, rgba(215,102,146,.54), rgba(94,158,188,.58)),
        url("https://images.unsplash.com/photo-1493246507139-91e8fad9978e?q=80&w=1200&auto=format&fit=crop");
    background-size: cover;
    background-position: center;
}

.profile-avatar {
    width: 82px;
    height: 82px;
    display: grid;
    place-items: center;
    margin-top: -38px;
    border: 4px solid rgba(255,255,255,.76);
    border-radius: 50%;
    background: #242a33;
    color: #f7c8d8;
    font-size: 2.35rem;
    font-family: "Times New Roman", Times, serif;
    box-shadow: 0 14px 34px rgba(43, 55, 66, .22);
}

.profile-kicker,
.hero-eyebrow,
.section-kicker {
    margin-top: 1rem;
    color: var(--accent);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .08em;
}

.profile-name {
    margin-top: .1rem;
    font-size: 2rem;
    line-height: 1.15;
    color: var(--text);
}

.profile-bio {
    margin-top: .65rem;
    color: var(--text-muted);
    font-size: .96rem;
}

.profile-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: .55rem;
    margin-top: 1.1rem;
}

.profile-stats div {
    padding: .7rem .55rem;
    border: 1px solid rgba(255,255,255,.62);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,.45);
    text-align: center;
}

.profile-stats strong,
.profile-stats span {
    display: block;
}

.profile-stats strong {
    font-family: "Times New Roman", Times, serif;
    font-size: 1.05rem;
}

.profile-stats span {
    color: var(--text-muted);
    font-size: .78rem;
}

.home-main {
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.hero {
    min-height: 278px;
    padding: 2.4rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    right: -60px;
    bottom: -90px;
    width: 260px;
    height: 260px;
    border-radius: 50%;
    border: 1px solid rgba(215,102,146,.32);
    background: radial-gradient(circle, rgba(255,255,255,.45), transparent 62%);
}

.hero-title {
    max-width: 720px;
    margin-top: .35rem;
    color: #202730;
    font-size: clamp(2.15rem, 5vw, 4.15rem);
    line-height: 1.05;
    letter-spacing: 0;
}

.hero-sub {
    max-width: 650px;
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 1.04rem;
}

.hero-actions {
    display: flex;
    gap: .75rem;
    flex-wrap: wrap;
    margin-top: 1.45rem;
}

.btn-primary,
.btn-secondary,
.form-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 40px;
    padding: .7rem 1.1rem;
    border-radius: 999px;
    font-weight: 700;
    font-family: var(--font);
}

.btn-primary,
.form-btn {
    background: #222831;
    color: #fff !important;
    border: 1px solid rgba(34,40,49,.12);
}

.btn-primary:hover,
.form-btn:hover {
    background: var(--accent);
}

.btn-secondary {
    color: var(--text) !important;
    border: 1px solid rgba(255,255,255,.68);
    background: rgba(255,255,255,.42);
}

.feature-grid,
.card-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.feature-card,
.card {
    min-height: 220px;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    color: var(--text) !important;
}

.feature-card:hover,
.card:hover {
    transform: translateY(-4px);
    border-color: rgba(215,102,146,.38);
    background: var(--panel-strong);
}

.feature-index {
    color: var(--accent-2);
    font-family: "Times New Roman", Times, serif;
    font-size: .95rem;
}

.feature-card h3,
.card-title {
    margin-top: .65rem;
    color: var(--text);
    font-size: 1.25rem;
}

.feature-card p,
.card-desc {
    margin-top: .55rem;
    color: var(--text-muted);
    font-size: .94rem;
}

.card-link {
    margin-top: auto;
    padding-top: 1rem;
    color: var(--accent);
    font-weight: 700;
    font-size: .92rem;
}

.card-icon {
    font-size: 1.8rem;
}

.section,
.dashboard-panel {
    margin: 0;
}

.dashboard-panel {
    padding: 1.25rem;
}

.section-title {
    color: var(--text);
    font-size: 1.35rem;
    margin-bottom: 1rem;
}

.tool-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: .7rem;
}

.tool-item {
    min-height: 54px;
    background: rgba(255,255,255,.46);
    border: 1px solid rgba(255,255,255,.62);
    border-radius: var(--radius-sm);
    padding: .75rem .85rem;
    display: flex;
    justify-content: space-between;
    gap: .5rem;
    align-items: center;
}

.tool-name {
    color: var(--text);
    font-weight: 700;
}

.tool-tag {
    background: rgba(215, 102, 146, 0.12);
    color: var(--accent);
    font-size: .75rem;
    padding: 2px 8px;
    border-radius: 999px;
    white-space: nowrap;
}

.activity-panel {
    padding: 1.25rem;
}

.activity-head {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 1rem;
    margin-bottom: 1rem;
}

.activity-stats {
    display: flex;
    gap: .5rem;
    flex-wrap: wrap;
    justify-content: flex-end;
}

.activity-stats span,
.search-type {
    display: inline-flex;
    align-items: center;
    min-height: 26px;
    padding: 2px 9px;
    border-radius: 999px;
    background: rgba(215,102,146,.11);
    color: var(--accent);
    font-size: .78rem;
}

.activity-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: .85rem;
}

.activity-column {
    min-width: 0;
}

.activity-column-title {
    margin-bottom: .55rem;
    color: var(--text);
    font-weight: 700;
}

.activity-item {
    display: block;
    min-height: 112px;
    padding: .8rem .9rem;
    margin-bottom: .6rem;
    border: 1px solid rgba(255,255,255,.58);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,.42);
    color: var(--text) !important;
}

.activity-item:hover {
    transform: translateY(-2px);
    background: rgba(255,255,255,.62);
}

.activity-item strong,
.activity-item span,
.activity-item small {
    display: block;
}

.activity-item strong {
    font-size: .98rem;
}

.activity-item span {
    margin-top: .25rem;
    color: var(--text-muted);
    font-size: .88rem;
}

.activity-item small {
    margin-top: .45rem;
    color: var(--text-dim);
}

.activity-empty {
    color: var(--text-dim);
    font-size: .9rem;
}

.about-shell,
.search-page {
    max-width: 980px;
    margin: 0 auto;
}

.about-hero {
    padding: 2rem;
    margin-bottom: 1rem;
}

.about-hero h1 {
    font-family: "Times New Roman", Times, serif;
    font-size: clamp(2.4rem, 5vw, 4rem);
    line-height: 1;
    color: var(--text);
}

.about-hero p {
    max-width: 680px;
    margin-top: .8rem;
    color: var(--text-muted);
}

.about-actions {
    display: flex;
    gap: .7rem;
    flex-wrap: wrap;
    margin-top: 1.3rem;
}

.about-grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 1rem;
}

.about-card {
    padding: 1.25rem;
}

.about-card h2 {
    margin-bottom: .6rem;
    color: var(--text);
    font-size: 1.15rem;
}

.about-card p {
    color: var(--text-muted);
}

.search-hero {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: .75rem;
    padding: 1rem;
    margin-bottom: 1rem;
}

.search-summary {
    margin: .25rem 0 1rem;
    color: var(--text-muted);
}

.search-list {
    display: grid;
    gap: .75rem;
}

.search-card {
    display: grid;
    gap: .35rem;
    padding: 1rem;
    color: var(--text) !important;
}

.search-card:hover {
    transform: translateY(-2px);
    background: var(--panel-strong);
}

.search-card strong {
    font-size: 1.08rem;
}

.search-card p {
    color: var(--text-muted);
}

.search-card small {
    color: var(--text-dim);
}

.page-header {
    margin-bottom: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    color: var(--text);
    font-size: 1.55rem;
}

.page-desc,
.text-muted,
.session-info p {
    color: var(--text-muted);
}

.wiki-layout {
    display: grid;
    grid-template-columns: 260px 1fr;
    gap: 1.2rem;
    min-height: 60vh;
}

.wiki-sidebar {
    padding: 1rem;
    max-height: 72vh;
    overflow-y: auto;
    position: sticky;
    top: 86px;
}

.sidebar-title {
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: .08em;
    margin-bottom: .75rem;
}

.wiki-tree,
.tree-children {
    list-style: none;
}

.tree-children {
    padding-left: 1rem;
}

.tree-item summary,
.tree-file {
    color: var(--text-muted) !important;
    border-radius: var(--radius-sm);
    padding: 4px 7px;
    display: block;
}

.tree-item summary {
    cursor: pointer;
}

.tree-item summary:hover,
.tree-file:hover,
.tree-file.active {
    color: var(--text) !important;
    background: rgba(255,255,255,.5);
}

.tree-file.active {
    color: var(--accent) !important;
}

.wiki-content {
    padding: 1.5rem 1.8rem;
    min-height: 60vh;
}

.wiki-page-title {
    font-size: 1.55rem;
    color: var(--text);
    margin-bottom: 1rem;
    padding-bottom: .7rem;
    border-bottom: 1px solid var(--border-dark);
}

.wiki-empty,
.empty-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 32vh;
    color: var(--text-dim);
    text-align: center;
}

.markdown-body h1,
.markdown-body h2,
.markdown-body h3,
.markdown-body h4 {
    color: var(--text);
    margin: 1.35em 0 .55em;
}

.markdown-body h1 {
    font-size: 1.6rem;
    border-bottom: 1px solid var(--border-dark);
    padding-bottom: .35em;
}

.markdown-body h2 { font-size: 1.3rem; }
.markdown-body h3 { font-size: 1.12rem; }
.markdown-body p { margin: .8em 0; }
.markdown-body ul,
.markdown-body ol {
    padding-left: 1.5rem;
    margin: .5em 0;
}
.markdown-body li { margin: .3em 0; }

.markdown-body code {
    background: rgba(34,40,49,.07);
    padding: 2px 6px;
    border-radius: 4px;
}

.markdown-body pre {
    background: rgba(30,36,44,.88);
    color: #f8fafc;
    border-radius: var(--radius-sm);
    padding: 1rem;
    overflow-x: auto;
    margin: 1em 0;
}

.markdown-body pre code {
    background: transparent;
    color: inherit;
    padding: 0;
}

.markdown-body blockquote {
    border-left: 3px solid var(--accent);
    padding-left: 1rem;
    color: var(--text-muted);
}

.markdown-body table {
    width: 100%;
    border-collapse: collapse;
    margin: 1em 0;
}

.markdown-body th,
.markdown-body td {
    border: 1px solid var(--border-dark);
    padding: .5rem .7rem;
}

.markdown-body th {
    background: rgba(255,255,255,.42);
}

.markdown-body img {
    max-width: 100%;
    border-radius: var(--radius);
}

.wiki-search {
    position: relative;
    min-width: 220px;
}

#wiki-search-input,
#chat-input,
.form-input,
.role-select {
    width: 100%;
    background: rgba(255,255,255,.6);
    border: 1px solid rgba(255,255,255,.76);
    border-radius: var(--radius-sm);
    padding: .62rem .75rem;
    color: var(--text);
    font-family: var(--font);
    font-size: .94rem;
    outline: none;
}

#wiki-search-input:focus,
#chat-input:focus,
.form-input:focus,
.role-select:focus {
    border-color: rgba(215,102,146,.54);
}

.search-results {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 6px;
    max-height: 300px;
    overflow-y: auto;
    z-index: 50;
    background: rgba(255,255,255,.88);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.search-results.visible { display: block; }
.search-result-item { padding: .6rem .75rem; border-bottom: 1px solid var(--border-dark); }
.search-result-item:last-child { border-bottom: none; }
.search-snippets code { display: block; color: var(--text-dim); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.search-empty { padding: 1rem; color: var(--text-dim); text-align: center; }

.chat-container {
    display: flex;
    flex-direction: column;
    height: 68vh;
    overflow: hidden;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 1rem;
}

.msg {
    display: flex;
    gap: .75rem;
    margin-bottom: 1rem;
}

.msg-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-weight: 700;
    flex-shrink: 0;
    background: rgba(34,40,49,.08);
}

.msg-user .msg-avatar {
    background: rgba(215,102,146,.14);
    color: var(--accent);
}

.msg-bubble {
    background: rgba(255,255,255,.56);
    border: 1px solid rgba(255,255,255,.68);
    border-radius: 0 var(--radius) var(--radius) var(--radius);
    padding: .68rem 1rem;
    max-width: 80%;
}

.msg-user .msg-bubble {
    background: rgba(215,102,146,.10);
    border-radius: var(--radius) 0 var(--radius) var(--radius);
}

.chat-input-area {
    display: flex;
    gap: .6rem;
    padding: .85rem;
    border-top: 1px solid var(--border-dark);
}

#chat-input {
    flex: 1;
    resize: none;
    min-height: 42px;
    max-height: 200px;
}

#chat-send {
    border: none;
    border-radius: 999px;
    padding: 0 1.25rem;
    background: #222831;
    color: #fff;
    font-family: var(--font);
    font-weight: 700;
    cursor: pointer;
}

#chat-send:hover { background: var(--accent); }
#chat-send:disabled { opacity: .5; cursor: not-allowed; }

.breadcrumb {
    margin-bottom: 1rem;
    color: var(--text-dim);
}

.breadcrumb a {
    color: var(--text-muted) !important;
}

.file-list {
    overflow: hidden;
}

.file-item {
    border-bottom: 1px solid var(--border-dark);
}

.file-item:last-child { border-bottom: none; }

.file-link {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .78rem 1rem;
    color: var(--text) !important;
}

.file-link:hover {
    background: rgba(255,255,255,.42);
}

.file-icon,
.file-meta {
    flex-shrink: 0;
}

.file-name {
    flex: 1;
}

.file-meta {
    color: var(--text-dim);
    font-size: .82rem;
}

.auth-container {
    min-height: 64vh;
    display: flex;
    align-items: center;
    justify-content: center;
}

.auth-card {
    width: 100%;
    max-width: 400px;
    padding: 1.5rem;
}

.auth-title {
    text-align: center;
    font-size: 1.4rem;
    margin-bottom: 1.3rem;
}

.auth-form .form-group {
    margin-bottom: 1rem;
}

.auth-form label {
    display: block;
    color: var(--text-muted);
    margin-bottom: .35rem;
}

.form-btn {
    width: 100%;
    border: none;
    cursor: pointer;
    font-size: .95rem;
}

.form-btn-sm {
    width: auto;
    min-height: 32px;
    padding: .35rem .8rem;
    font-size: .82rem;
}

.auth-hint,
.auth-back {
    display: block;
    text-align: center;
    color: var(--text-muted) !important;
    margin-top: 1rem;
}

.admin-section {
    padding: 1.25rem;
    margin-bottom: 1rem;
    overflow-x: auto;
}

.admin-table {
    width: 100%;
    border-collapse: collapse;
}

.admin-table th,
.admin-table td {
    padding: .65rem .75rem;
    border-bottom: 1px solid var(--border-dark);
    text-align: left;
}

.admin-table th {
    color: var(--text-muted);
}

.admin-actions {
    display: flex;
    gap: .5rem;
    align-items: center;
}

.inline-form { display: inline; }

.role-badge,
.tool-tag {
    display: inline-block;
}

.role-badge {
    padding: 2px 10px;
    border-radius: 999px;
    font-size: .78rem;
}

.role-admin {
    background: rgba(217,170,86,.16);
    color: #946515;
}

.role-user {
    background: rgba(94,158,188,.14);
    color: #32718c;
}

.btn-danger {
    background: rgba(210, 70, 82, .12);
    color: #b43d4b;
    border: 1px solid rgba(210,70,82,.26);
    border-radius: 999px;
    padding: .28rem .65rem;
    cursor: pointer;
    font-family: var(--font);
}

.flash-messages {
    margin-bottom: 1rem;
}

.flash {
    padding: .7rem 1rem;
    border-radius: var(--radius);
    margin-bottom: .5rem;
    background: rgba(255,255,255,.68);
    border: 1px solid var(--border);
    box-shadow: var(--shadow);
    transition: opacity .3s;
}

.flash-success { color: #2f7b65; }
.flash-error { color: #bd4650; }
.flash-warning { color: #956a13; }
.flash-info { color: #2f6f92; }

.error-page {
    min-height: 52vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
}

.error-code {
    font-size: 5rem;
    color: var(--accent);
    line-height: 1;
}

.error-message {
    color: var(--text-muted);
    margin: .7rem 0 1.3rem;
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: rgba(102,117,130,.28);
    border-radius: 999px;
}

@keyframes blink {
    0%, 20%, 100% { opacity: 1; }
    50% { opacity: .35; }
}

@keyframes dog-idle {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-2px); }
}

@keyframes dog-tail-wag {
    0%, 100% { transform: rotate(16deg); }
    50% { transform: rotate(34deg); }
}

.typing-dots {
    animation: blink 1.4s infinite;
    letter-spacing: 2px;
}

.dog-chat {
    position: fixed;
    right: 1.15rem;
    bottom: 1.15rem;
    z-index: 220;
    font-family: var(--font);
}

.dog-chat-toggle {
    width: 66px;
    height: 66px;
    display: grid;
    place-items: center;
    border: 2px solid rgba(255,255,255,.78);
    border-radius: 8px;
    background:
        radial-gradient(circle at 30% 24%, rgba(255,255,255,.88), transparent 34px),
        rgba(255,255,255,.78);
    box-shadow: 0 18px 42px rgba(37,48,58,.22);
    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);
    cursor: pointer;
    transition: transform .18s ease, box-shadow .18s ease;
}

.dog-chat-toggle:hover {
    transform: translateY(-3px);
    box-shadow: 0 22px 52px rgba(37,48,58,.26);
}

.pixel-dog {
    position: relative;
    width: 46px;
    height: 46px;
    display: block;
    image-rendering: pixelated;
    animation: dog-idle 2.8s ease-in-out infinite;
}

.dog-face {
    position: absolute;
    left: 6px;
    top: 11px;
    width: 34px;
    height: 30px;
    border-radius: 6px 6px 9px 9px;
    background: #ffdca8;
    box-shadow:
        inset 0 -8px 0 #e7ad73,
        0 0 0 3px #27313b,
        0 4px 0 rgba(39,49,59,.16);
}

.dog-ear {
    position: absolute;
    top: 4px;
    width: 14px;
    height: 19px;
    border-radius: 5px 5px 3px 3px;
    background: #8a5739;
    box-shadow:
        inset 0 5px 0 #b8774a,
        0 0 0 3px #27313b;
}

.dog-ear-left {
    left: 2px;
    transform: rotate(-13deg);
}

.dog-ear-right {
    right: 2px;
    transform: rotate(13deg);
}

.dog-tail {
    position: absolute;
    right: -1px;
    top: 24px;
    width: 12px;
    height: 14px;
    border-radius: 2px 7px 7px 2px;
    background: #ffdca8;
    box-shadow: 0 0 0 3px #27313b;
    transform-origin: left center;
    animation: dog-tail-wag 1.4s steps(2) infinite;
}

.dog-patch {
    position: absolute;
    left: 2px;
    top: 3px;
    width: 12px;
    height: 13px;
    border-radius: 5px 2px 6px 2px;
    background: #fff1d8;
    opacity: .95;
}

.dog-eye {
    position: absolute;
    top: 11px;
    width: 6px;
    height: 6px;
    background: #27313b;
    border-radius: 2px;
    box-shadow: inset 2px 1px 0 rgba(255,255,255,.65);
}

.dog-eye-left { left: 9px; }
.dog-eye-right { right: 9px; }

.dog-blush {
    position: absolute;
    top: 18px;
    width: 6px;
    height: 3px;
    border-radius: 999px;
    background: rgba(233,117,132,.5);
}

.dog-blush-left { left: 5px; }
.dog-blush-right { right: 5px; }

.dog-muzzle {
    position: absolute;
    left: 10px;
    bottom: 5px;
    width: 11px;
    height: 9px;
    border-radius: 5px 5px 4px 4px;
    background: #fff1d8;
    box-shadow:
        6px 0 0 #fff1d8;
}

.dog-nose {
    position: absolute;
    left: 15px;
    bottom: 11px;
    width: 5px;
    height: 4px;
    border-radius: 2px;
    background: #27313b;
    box-shadow: 2px 4px 0 -1px #27313b;
}

.dog-chat-panel {
    position: absolute;
    right: 0;
    bottom: 78px;
    width: min(360px, calc(100vw - 1.6rem));
    height: min(520px, calc(100vh - 8rem));
    display: flex;
    flex-direction: column;
    overflow: hidden;
    border: 1px solid rgba(255,255,255,.72);
    border-radius: var(--radius);
    background: rgba(255,255,255,.78);
    box-shadow: 0 26px 80px rgba(37,48,58,.22);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.dog-chat-panel[hidden] {
    display: none;
}

.dog-chat-head {
    min-height: 58px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: .85rem 1rem;
    border-bottom: 1px solid var(--border-dark);
}

.dog-chat-head strong,
.dog-chat-head span {
    display: block;
}

.dog-chat-head strong {
    color: var(--text);
    font-size: 1rem;
}

.dog-chat-head span {
    color: var(--text-muted);
    font-size: .8rem;
}

#dog-chat-close {
    width: 32px;
    height: 32px;
    border: 1px solid rgba(255,255,255,.7);
    border-radius: 50%;
    background: rgba(255,255,255,.55);
    color: var(--text);
    cursor: pointer;
    font-size: 1.2rem;
    line-height: 1;
}

.dog-chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: .9rem;
}

.dog-msg {
    display: flex;
    gap: .55rem;
    margin-bottom: .8rem;
    align-items: flex-start;
}

.dog-msg-user {
    flex-direction: row-reverse;
}

.dog-msg-avatar {
    width: 30px;
    height: 30px;
    display: grid;
    place-items: center;
    flex: 0 0 auto;
    border-radius: 4px;
    background: #27313b;
    color: #f8c7d8;
    font-family: "Times New Roman", Times, serif;
    font-weight: 700;
}

.dog-msg p {
    max-width: calc(100% - 44px);
    margin: 0;
    padding: .62rem .75rem;
    border: 1px solid rgba(255,255,255,.66);
    border-radius: 0 var(--radius-sm) var(--radius-sm) var(--radius-sm);
    background: rgba(255,255,255,.58);
    color: var(--text);
    font-size: .9rem;
    line-height: 1.55;
    word-break: break-word;
}

.dog-msg-user p {
    border-radius: var(--radius-sm) 0 var(--radius-sm) var(--radius-sm);
    background: rgba(215,102,146,.13);
}

.dog-chat-form {
    display: flex;
    gap: .55rem;
    padding: .75rem;
    border-top: 1px solid var(--border-dark);
}

#dog-chat-input {
    flex: 1;
    min-height: 40px;
    max-height: 120px;
    resize: none;
    border: 1px solid rgba(255,255,255,.72);
    border-radius: var(--radius-sm);
    background: rgba(255,255,255,.62);
    color: var(--text);
    font-family: var(--font);
    font-size: .9rem;
    line-height: 1.4;
    padding: .6rem .7rem;
    outline: none;
}

#dog-chat-input:focus {
    border-color: rgba(215,102,146,.55);
}

#dog-chat-send {
    flex: 0 0 auto;
    border: none;
    border-radius: 999px;
    background: #222831;
    color: #fff;
    font-family: var(--font);
    font-weight: 700;
    padding: 0 .95rem;
    cursor: pointer;
}

#dog-chat-send:disabled {
    opacity: .55;
    cursor: not-allowed;
}

@media (max-width: 900px) {
    .home-shell {
        grid-template-columns: 1fr;
    }

    .profile-card,
    .wiki-sidebar {
        position: static;
    }

    .feature-grid,
    .card-grid,
    .activity-grid,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .wiki-layout {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .nav-inner {
        position: relative;
        align-items: flex-start;
        flex-direction: column;
        gap: .55rem;
        padding: .7rem .8rem .62rem;
    }

    .nav-brand {
        flex: 0 0 auto;
    }

    .mobile-top-search {
        display: block;
        position: absolute;
        right: .8rem;
        top: .68rem;
        width: min(42vw, 168px);
    }

    .mobile-top-search input {
        width: 100%;
        min-height: 32px;
        border: 1px solid rgba(255,255,255,.74);
        border-radius: 999px;
        background: rgba(255,255,255,.58);
        color: var(--text);
        font-family: var(--font);
        font-size: .86rem;
        padding: .32rem .72rem;
        outline: none;
    }

    .nav-links {
        width: 100%;
        justify-content: flex-start;
        flex-wrap: nowrap;
        overflow-x: auto;
        overflow-y: hidden;
        white-space: nowrap;
        gap: .45rem;
        padding: 0 0 .2rem;
        scrollbar-width: none;
        -webkit-overflow-scrolling: touch;
        mask-image: linear-gradient(90deg, #000 calc(100% - 48px), transparent 98%);
    }

    .nav-links::-webkit-scrollbar {
        display: none;
    }

    .nav-link {
        font-size: .82rem;
        white-space: nowrap;
    }

    .brand-mark {
        width: 30px;
        height: 30px;
    }

    .brand-text {
        font-size: 1rem;
    }

    .nav-link,
    .nav-user {
        flex: 0 0 auto;
        padding: .38rem .68rem;
    }

    .nav-search,
    .nav-search input,
    .nav-search input:focus {
        display: none;
    }

    .main-content {
        padding: 1rem .8rem 2rem;
    }

    .hero {
        padding: 1.35rem;
        min-height: auto;
    }

    .hero-title {
        font-size: 2.25rem;
    }

    .chat-input-area,
    .file-link,
    .admin-actions,
    .activity-head,
    .search-hero {
        flex-wrap: wrap;
    }

    .activity-head {
        display: block;
    }

    .activity-stats {
        justify-content: flex-start;
        margin-top: .75rem;
    }

    .search-hero {
        display: flex;
    }

    .msg-bubble {
        max-width: 92%;
    }

    .dog-chat {
        right: .8rem;
        bottom: calc(.8rem + env(safe-area-inset-bottom));
    }

    .dog-chat-toggle {
        width: 58px;
        height: 58px;
    }

    .dog-chat-panel {
        right: 0;
        bottom: 64px;
        width: calc(100vw - 1.6rem);
        height: min(460px, calc(100dvh - 7rem));
    }

    .dog-chat-head {
        min-height: 46px;
        padding: .55rem .7rem;
    }

    #dog-chat-close {
        width: 28px;
        height: 28px;
        font-size: 1rem;
    }

    .dog-chat-form {
        gap: .4rem;
        padding: .55rem;
        padding-bottom: max(.55rem, env(safe-area-inset-bottom));
    }

    #dog-chat-input {
        min-height: 36px;
        padding: .45rem .6rem;
    }

    #dog-chat-send {
        padding: 0 .75rem;
    }
}

/* ═══════════════════════════════════════════════
   Blog & Guestbook Styles
   ═══════════════════════════════════════════════ */

.blog-list {
    max-width: 700px;
    margin: 0 auto;
}

.blog-card {
    padding: 1.2rem 1.5rem;
    margin-bottom: 0.8rem;
    transition: transform .15s, box-shadow .15s;
}

.blog-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px rgba(65, 83, 101, 0.12);
}

.blog-title-link {
    text-decoration: none !important;
    color: var(--text) !important;
}

.blog-card-title {
    font-size: 1.05rem;
    margin-bottom: 0.3rem;
    color: var(--text);
}

.blog-meta {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.blog-sep {
    margin: 0 0.4rem;
    color: var(--text-dim);
}

.blog-excerpt {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.6;
}

.msg-item {
    transition: transform .1s;
}

.msg-item:hover {
    transform: translateX(4px);
}

.guestbook-wrap textarea {
    font-family: var(--font);
}

/* Android app download page */
.app-download-page {
    max-width: 680px;
    margin: 2rem auto;
}

.app-download-hero {
    padding: 3rem 2rem;
    text-align: center;
}

.app-download-title {
    font-size: clamp(1.8rem, 6vw, 2.7rem);
}

.app-download-subtitle {
    margin-top: .75rem;
}

.app-download-card {
    max-width: 330px;
    margin: 2rem auto;
    padding: 2rem;
    text-align: center;
}

.app-phone-icon {
    width: 68px;
    height: 68px;
    margin: 0 auto .8rem;
    border-radius: 18px;
    display: grid;
    place-items: center;
    background: #222831;
    color: #f7c8d8;
    font-family: "Times New Roman", Times, serif;
    font-size: 2.2rem;
    font-weight: 700;
    box-shadow: 0 12px 28px rgba(34, 40, 49, .2);
}

.app-download-button {
    display: inline-flex;
    margin-top: 1rem;
}

.app-release-notes,
.app-install-guide {
    max-width: 460px;
    margin: 1.5rem auto 0;
    text-align: left;
}

.app-release-notes p,
.app-install-guide ol {
    margin-top: .55rem;
    color: var(--text-muted);
    font-size: .92rem;
    line-height: 1.8;
}

.app-install-guide ol {
    padding-left: 1.3rem;
}

@media (max-width: 640px) {
    .app-download-page {
        margin: .5rem auto;
    }

    .app-download-hero {
        padding: 1.5rem 1rem;
    }

    .app-download-card {
        margin: 1.35rem auto;
        padding: 1.5rem 1rem;
    }
}

.admin-table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
}

.admin-user-table {
    min-width: 1080px;
}

.activity-time {
    white-space: nowrap;
}

.source-badge {
    display: inline-block;
    margin-left: .35rem;
    padding: .08rem .38rem;
    border-radius: 999px;
    font-size: .72rem;
    font-weight: 700;
    white-space: nowrap;
}

.source-app {
    color: #8c3158;
    background: rgba(215, 102, 146, .16);
}

.source-web {
    color: #356f89;
    background: rgba(94, 158, 188, .16);
}