/* 全站样式。按"基础 -> 布局 -> 组件 -> 页面"分段组织。 */

/* ============================================================ 基础 */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: var(--bg-0);
    color: var(--fg-0);
    font-family: var(--font-ui);
    font-size: 15px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

/* 有侧栏的页面：左侧固定导航，右侧主栏 + 页脚 */
body.body--with-sidebar {
    display: grid;
    grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
    grid-template-rows: 1fr auto;
}

::selection {
    background: var(--selection);
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover {
    color: var(--accent-hover);
}

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

h1,
h2,
h3,
h4 {
    line-height: 1.35;
    font-weight: 600;
}

code,
pre,
kbd {
    font-family: var(--font-mono);
    font-size: 0.92em;
}

/* ============================================================ 布局 */
.site-main {
    flex: 1 0 auto;
    width: 100%;
    max-width: var(--content-width);
    margin: 0 auto;
    padding: 32px 20px 56px;
}

.body--with-sidebar .site-main {
    grid-column: 2;
    grid-row: 1;
}

.site-main--wide {
    max-width: var(--wide-width);
}

.body--with-sidebar .footer:not(.footer--overlay) {
    grid-column: 2;
    grid-row: 2;
}

/* ============================================================ 左侧导航 */
.sidebar {
    grid-column: 1;
    grid-row: 1 / -1;
    position: sticky;
    top: 0;
    z-index: 20;
    display: flex;
    flex-direction: column;
    height: 100vh;
    padding: 22px 14px 16px;
    background: var(--bg-1);
    border-right: 1px solid var(--border);
    overflow-y: auto;
}

.sidebar__brand {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin: 0 8px 28px;
    color: var(--fg-0);
}

.sidebar__brand:hover {
    color: var(--fg-0);
}

.sidebar__brand-name {
    font-weight: 600;
    font-size: 16px;
    letter-spacing: 1px;
}

.sidebar__brand-domain {
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--fg-2);
}

.sidebar__nav {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar__link {
    display: block;
    padding: 8px 10px;
    border-radius: var(--radius-sm);
    color: var(--fg-1);
    font-size: 14px;
    border-left: 2px solid transparent;
}

.sidebar__link:hover {
    color: var(--fg-0);
    background: var(--bg-2);
}

.sidebar__link.is-active {
    color: var(--fg-0);
    background: var(--bg-2);
    border-left-color: var(--accent);
}

.sidebar__link--nested {
    padding-left: 20px;
    font-size: 13px;
}

.sidebar__group {
    display: flex;
    flex-direction: column;
    gap: 2px;
    margin-top: 16px;
}

.sidebar__group-label {
    padding: 6px 10px 4px;
    color: var(--fg-2);
    font-size: 11px;
    font-family: var(--font-mono);
    letter-spacing: 1px;
    text-transform: uppercase;
}

.sidebar__spacer {
    flex: 1;
}

.sidebar__session {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.sidebar__user {
    color: var(--fg-1);
    font-family: var(--font-mono);
    font-size: 13px;
    padding: 0 10px;
}

.sidebar__login,
.sidebar__logout {
    width: 100%;
}

.sidebar-toggle,
.sidebar-backdrop {
    display: none;
}

.sidebar-toggle {
    position: fixed;
    top: 12px;
    left: 12px;
    z-index: 50;
    width: 40px;
    height: 40px;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 5px;
    padding: 0;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-1);
    cursor: pointer;
}

.sidebar-toggle__bar {
    display: block;
    width: 18px;
    height: 2px;
    background: var(--fg-0);
}

.sidebar-backdrop {
    position: fixed;
    inset: 0;
    z-index: 15;
    background: rgba(0, 0, 0, 0.45);
}

/* ============================================================ 页脚 */
.footer {
    flex-shrink: 0;
    padding: 18px 20px;
    border-top: 1px solid var(--border);
    background: var(--bg-1);
    color: var(--fg-1);
    font-size: 13px;
    text-align: center;
}

.footer__row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    gap: 6px 12px;
}

.footer__sep {
    color: var(--fg-2);
}

.footer a {
    color: var(--fg-1);
}

.footer a:hover {
    color: var(--accent);
}

/* 首页的页脚浮在 canvas 之上：备案信息必须在每个页面都可见 */
.footer--overlay {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(30, 31, 34, 0.72);
    border-top: 1px solid rgba(60, 63, 65, 0.6);
    backdrop-filter: blur(4px);
}

/* ============================================================ 按钮 */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    padding: 7px 14px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    background: var(--bg-2);
    color: var(--fg-0);
    font-family: inherit;
    font-size: 14px;
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition), color var(--transition);
}

.btn:hover:not(:disabled) {
    border-color: var(--accent);
    color: var(--accent);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn--primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #0d1117;
    font-weight: 600;
}

.btn--primary:hover:not(:disabled) {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: #0d1117;
}

/* 主按钮禁用时要明显退色，否则强调色底仍然显得可点 */
.btn--primary:disabled {
    background: var(--bg-2);
    border-color: var(--border-strong);
    color: var(--fg-2);
}

.btn--ghost {
    background: transparent;
    border-color: transparent;
    color: var(--fg-1);
}

.btn--ghost:hover:not(:disabled) {
    color: var(--accent);
    border-color: transparent;
}

.btn--danger:hover:not(:disabled) {
    border-color: var(--danger);
    color: var(--danger);
}

.btn--sm {
    padding: 4px 10px;
    font-size: 13px;
}

/* ============================================================ 表单 */
.field {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 14px;
}

.field__label {
    font-size: 13px;
    color: var(--fg-1);
}

.input,
.textarea,
.select {
    width: 100%;
    padding: 8px 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-0);
    color: var(--fg-0);
    font-family: inherit;
    font-size: 14px;
    transition: border-color var(--transition);
}

.input:focus,
.textarea:focus,
.select:focus {
    border-color: var(--accent);
    outline: none;
}

.textarea {
    font-family: var(--font-mono);
    line-height: 1.6;
    resize: vertical;
}

/* 面板标题栏里的下拉框不占满整行 */
.select--inline {
    width: auto;
    padding: 4px 8px;
    font-size: 13px;
}

.input--code {
    font-family: var(--font-mono);
    letter-spacing: 4px;
    text-align: center;
    font-size: 18px;
}

/* ============================================================ 提示条 */
.alert {
    padding: 8px 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--danger);
    background: rgba(224, 108, 117, 0.12);
    color: var(--danger);
    font-size: 13px;
}

.alert--success {
    border-color: var(--success);
    background: rgba(126, 231, 135, 0.12);
    color: var(--success);
}

.alert[hidden] {
    display: none;
}

.hint {
    color: var(--fg-2);
    font-size: 13px;
}

/* ============================================================ 登录弹窗 */
.dialog {
    width: min(360px, calc(100vw - 32px));
    padding: 0;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--bg-1);
    color: var(--fg-0);
}

.dialog::backdrop {
    background: rgba(0, 0, 0, 0.6);
}

.dialog__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 16px;
    border-bottom: 1px solid var(--border);
    font-weight: 600;
}

.dialog__body {
    padding: 16px;
}

.dialog__footer {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    padding: 0 16px 16px;
}

/* ============================================================ 文章列表 */
.page-title {
    margin: 0 0 4px;
    font-size: 22px;
}

.page-subtitle {
    margin: 0 0 28px;
    color: var(--fg-2);
    font-size: 13px;
    font-family: var(--font-mono);
}

.card-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.card {
    display: block;
    padding: 16px 18px;
    border: 1px solid var(--border);
    border-left: 2px solid transparent;
    border-radius: var(--radius);
    background: var(--bg-1);
    color: inherit;
    transition: border-color var(--transition), background var(--transition);
}

.card:hover {
    background: var(--bg-2);
    border-left-color: var(--accent);
    color: inherit;
}

.card__title {
    margin: 0 0 6px;
    font-size: 17px;
    color: var(--fg-0);
}

.card__summary {
    margin: 0 0 10px;
    color: var(--fg-1);
    font-size: 14px;
}

.card__meta {
    color: var(--fg-2);
    font-size: 12px;
    font-family: var(--font-mono);
}

.pager {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 14px;
    margin-top: 28px;
    color: var(--fg-2);
    font-size: 13px;
    font-family: var(--font-mono);
}

.empty {
    padding: 48px 0;
    text-align: center;
    color: var(--fg-2);
}

/* ============================================================ 文章正文 */
.article__header {
    margin-bottom: 28px;
    padding-bottom: 18px;
    border-bottom: 1px solid var(--border);
}

.article__title {
    margin: 0 0 8px;
    font-size: 26px;
}

.article__meta {
    color: var(--fg-2);
    font-size: 12px;
    font-family: var(--font-mono);
}

.markdown {
    overflow-wrap: break-word;
}

.markdown > :first-child {
    margin-top: 0;
}

.markdown h1,
.markdown h2,
.markdown h3,
.markdown h4 {
    margin: 32px 0 12px;
}

.markdown h1 {
    font-size: 22px;
}

.markdown h2 {
    font-size: 19px;
    padding-bottom: 6px;
    border-bottom: 1px solid var(--border);
}

.markdown h3 {
    font-size: 17px;
}

.markdown p {
    margin: 14px 0;
}

.markdown ul,
.markdown ol {
    padding-left: 22px;
}

.markdown li {
    margin: 6px 0;
}

.markdown blockquote {
    margin: 16px 0;
    padding: 4px 16px;
    border-left: 2px solid var(--accent);
    background: var(--bg-1);
    color: var(--fg-1);
}

.markdown code {
    padding: 2px 5px;
    border-radius: var(--radius-sm);
    background: var(--code-bg);
    color: #d19a66;
}

.markdown pre {
    margin: 18px 0;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--code-bg);
    overflow-x: auto;
}

.markdown pre code {
    padding: 0;
    background: none;
    color: var(--fg-0);
}

.markdown table {
    width: 100%;
    margin: 18px 0;
    border-collapse: collapse;
    font-size: 14px;
}

.markdown th,
.markdown td {
    padding: 8px 10px;
    border: 1px solid var(--border);
    text-align: left;
}

.markdown th {
    background: var(--bg-1);
}

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

.markdown hr {
    margin: 28px 0;
    border: none;
    border-top: 1px solid var(--border);
}

/* ============================================================ 管理页 */
.admin {
    display: grid;
    grid-template-columns: minmax(280px, 360px) 1fr;
    gap: 20px;
    align-items: start;
}

.panel {
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-1);
    overflow: hidden;
}

.panel__header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    padding: 12px 14px;
    border-bottom: 1px solid var(--border);
    font-size: 14px;
    font-weight: 600;
}

.panel__body {
    padding: 14px;
}

.article-rows {
    max-height: 62vh;
    overflow-y: auto;
}

.article-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
    width: 100%;
    padding: 10px 14px;
    border: none;
    border-bottom: 1px solid var(--border);
    border-left: 2px solid transparent;
    background: none;
    color: var(--fg-0);
    font-family: inherit;
    font-size: 14px;
    text-align: left;
    cursor: pointer;
    transition: background var(--transition);
}

.article-row:hover {
    background: var(--bg-2);
}

.article-row[aria-selected="true"] {
    background: var(--bg-2);
    border-left-color: var(--accent);
}

.article-row__meta {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--fg-2);
    font-size: 12px;
    font-family: var(--font-mono);
}

.badge {
    padding: 1px 6px;
    border-radius: var(--radius-sm);
    border: 1px solid currentColor;
    font-size: 11px;
    font-family: var(--font-mono);
}

.badge--draft {
    color: var(--warn);
}

.badge--published {
    color: var(--success);
}

.editor-toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 14px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--border);
}

.editor-toolbar__spacer {
    flex: 1;
}

.editor-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
}

.editor-split__pane {
    display: flex;
    flex-direction: column;
    gap: 6px;
    min-width: 0;
}

.editor-split__label {
    color: var(--fg-2);
    font-size: 12px;
    font-family: var(--font-mono);
}

.textarea--editor {
    min-height: 48vh;
}

.preview {
    min-height: 48vh;
    max-height: 60vh;
    padding: 12px 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--bg-0);
    overflow-y: auto;
}

/* ============================================================ 看猫图片墙 */
.photo-wall {
    column-count: 3;
    column-gap: 14px;
}

.photo-card {
    display: block;
    width: 100%;
    margin: 0 0 14px;
    break-inside: avoid;
    padding: 0;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-1);
    color: inherit;
    font: inherit;
    text-align: left;
    overflow: hidden;
    cursor: zoom-in;
}

.photo-card:hover {
    border-color: var(--accent);
    color: inherit;
}

.photo-card img {
    display: block;
    width: 100%;
    height: auto;
}

.photo-card__caption {
    padding: 8px 12px;
    color: var(--fg-1);
    font-size: 13px;
}

.lightbox {
    max-width: min(92vw, 1100px);
    max-height: 92vh;
    padding: 0;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius);
    background: var(--bg-0);
    color: var(--fg-0);
}

.lightbox::backdrop {
    background: rgba(0, 0, 0, 0.72);
}

.lightbox img {
    display: block;
    max-width: 92vw;
    max-height: 84vh;
    margin: 0 auto;
}

.lightbox__caption {
    margin: 0;
    padding: 10px 14px;
    color: var(--fg-1);
    font-size: 13px;
    text-align: center;
}

/* ============================================================ 看猫管理 */
.admin-cats {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.upload-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    align-items: flex-end;
}

.upload-panel .field {
    margin-bottom: 0;
    flex: 1 1 220px;
}

.admin-photo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 14px;
}

.admin-photo {
    display: flex;
    flex-direction: column;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-1);
    overflow: hidden;
}

.admin-photo img {
    display: block;
    width: 100%;
    height: 180px;
    object-fit: cover;
    background: var(--bg-0);
}

.admin-photo__meta {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    padding: 10px 12px;
}

.admin-photo__name {
    min-width: 0;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    color: var(--fg-1);
    font-size: 12px;
    font-family: var(--font-mono);
}

/* ============================================================ 首页 */
.hero {
    position: relative;
    flex: 1 0 auto;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    overflow: hidden;
}

.hero__canvas {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    display: block;
}

/* WebGL 不可用时的兜底背景 */
.hero__fallback {
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 50% 45%, #26323f 0%, var(--bg-0) 70%);
}

.hero__content {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 20px;
}

.hero__title {
    margin: 0 0 10px;
    font-size: clamp(28px, 6vw, 44px);
    letter-spacing: 6px;
}

.hero__subtitle {
    margin: 0 0 32px;
    color: var(--fg-1);
    font-family: var(--font-mono);
    font-size: 13px;
    letter-spacing: 2px;
}

.hero__enter {
    padding: 10px 40px;
    font-size: 15px;
    letter-spacing: 4px;
    background: rgba(30, 31, 34, 0.6);
    border-color: var(--accent);
    color: var(--accent);
}

.hero__enter:hover {
    background: var(--accent);
    color: #0d1117;
}

/* ============================================================ 响应式 */
@media (max-width: 900px) {
    .admin {
        grid-template-columns: 1fr;
    }

    .editor-split {
        grid-template-columns: 1fr;
    }

    .photo-wall {
        column-count: 2;
    }
}

@media (max-width: 800px) {
    body.body--with-sidebar {
        display: flex;
        flex-direction: column;
        overflow-x: hidden;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        grid-column: unset;
        grid-row: unset;
        width: min(var(--sidebar-width), 86vw);
        height: 100vh;
        padding: 56px 14px 16px;
        transform: translateX(-110%);
        transition: transform var(--transition);
        box-shadow: none;
    }

    .sidebar.is-open {
        transform: translateX(0);
        box-shadow: 8px 0 24px rgba(0, 0, 0, 0.35);
    }

    .sidebar-toggle {
        display: flex;
    }

    .sidebar-backdrop:not([hidden]) {
        display: block;
    }

    .body--with-sidebar .site-main,
    .body--with-sidebar .footer:not(.footer--overlay) {
        grid-column: unset;
        grid-row: unset;
    }

    .site-main {
        padding-top: 64px;
    }
}

@media (max-width: 600px) {
    .site-main {
        padding: 64px 14px 48px;
    }

    .photo-wall {
        column-count: 1;
    }
}

/* 用户要求减少动效时，不做任何过渡（首页动画的暂停逻辑在 renderer.js 里） */
@media (prefers-reduced-motion: reduce) {
    * {
        transition: none !important;
    }
}