/* ===========================================================================
 * kanju 主题 · 左栏（side rail）
 *
 * 规格取自 `kanju41-mirror/screenshots/home.png` 的左栏裁切（300x900）。
 * 结构自上而下：账号卡 → 等级卡 → 琥珀警告条 → 快捷三格（线框图标）
 *              → 历史/收藏 Tab + 列表 → 会话入口 → 底部设置/登录
 * 两套状态（决策 12.1）：未登录（本文件当前形态）/ 已登录（由主题 JS 替换，任务 3.4）
 * ========================================================================= */

.k-rail {
    display: flex;
    flex-direction: column;
    gap: 0.5rem; /* 8px：对照 mirror 上段更紧，列表段靠卡片自身 padding 呼吸 */
    min-height: 100%;
    color: var(--k-text);
}

/* ── 通用：小头像 ── */
.k-avatar {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.75rem; /* 44px，对照 mirror 游客头像 */
    height: 2.75rem;
    border-radius: 50%;
    background: rgb(var(--k-primary-rgb) / 10%);
    border: 1px solid rgb(255 255 255 / 28%);
    color: var(--k-text-muted);
    object-fit: cover;
    overflow: hidden;
}
html.light .k-avatar {
    border-color: var(--k-interactive-border);
}
.k-avatar > svg {
    flex: 0 0 auto;
    opacity: 0.85;
}
.k-avatar[data-k-guest-av="1"] {
    font-size: 1.05rem;
    font-weight: 700;
    letter-spacing: 0;
    text-shadow: 0 1px 2px rgb(0 0 0 / 35%);
}
.k-avatar[data-k-guest-av="1"] > svg { display: none; }
.k-avatar > img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.k-avatar--sm {
    width: 1.5rem;
    height: 1.5rem;
}

/* ── 1. 账号卡 ── */
.k-rail-account {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.125rem 0.125rem 0.375rem;
}

.k-rail-account-text {
    min-width: 0;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.0625rem;
}

.k-rail-account-text strong {
    font-size: 1rem; /* 16px，对照 mirror text-base */
    font-weight: 900; /* font-black */
    line-height: 1.25;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.k-rail-account-text span {
    font-size: var(--k-fs-xs);
    color: var(--k-text-subtle);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.k-rail-account-actions {
    display: flex;
    align-items: center;
    gap: 0.375rem;
}

/* 顶栏那种小图标按钮（本文件里用于账号卡右侧） */
.k-iconbtn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 1.75rem;
    height: 1.75rem;
    border-radius: 0.375rem;
    border: 1px solid var(--k-interactive-border);
    background: transparent;
    color: var(--k-text-muted);
    cursor: pointer;
    transition: border-color 0.15s, color 0.15s;
}

.k-iconbtn:active {
    transform: scale(0.96);
}
.k-iconbtn:hover {
    border-color: var(--k-interactive-border-hover);
    color: var(--k-text);
}

/* ── 2. AI 额度卡（原等级卡壳，去掉成长/帮助）── */
.k-rail-level,
.k-rail-quota {
    position: relative;
    border-radius: 12px;
    background: var(--k-card);
    border: 1px solid var(--k-interactive-border);
    box-shadow: none;
    padding: 10px 12px 8px;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.k-rail-level[hidden],
.k-rail-quota[hidden] {
    display: none;
}

.k-rail-level-top {
    display: flex;
    align-items: center;
    gap: 7px;
}

.k-rail-level-icon {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    flex: 0 0 auto;
    border-radius: 7px;
    background: rgb(var(--k-primary-rgb) / 12%);
    color: var(--k-primary-strong);
}

.k-rail-level-name {
    font-size: var(--k-fs-sm);
    font-weight: 700;
    color: var(--k-text);
    white-space: nowrap;
}

.k-rail-level-bar {
    flex: 1;
    min-width: 0;
    height: 4px;
    border-radius: 999px;
    background: rgb(var(--k-hover-rgb) / 80%);
    overflow: hidden;
}

.k-rail-level-bar > i {
    display: block;
    height: 100%;
    border-radius: inherit;
    background: var(--k-primary);
}

.k-rail-level-pct {
    min-width: 1.5em;
    text-align: right;
    font-size: var(--k-fs-xs);
    font-weight: 700;
    color: var(--k-primary);
    font-variant-numeric: tabular-nums;
}

.k-rail-level-bottom {
    display: flex;
    align-items: center;
    font-size: var(--k-fs-xs);
    color: var(--k-text-muted);
}

/* ── 3. 琥珀警告条 ── */
.k-rail-warn {
    /* 由 <p> 改成 <button>（可点开地址提醒）——复位按钮默认样式 */
    width: 100%;
    text-align: left;
    font-family: inherit;
    cursor: pointer;
    margin: 0;
    border-radius: var(--k-radius);
    border: 1px solid var(--k-warning-border);
    background: var(--k-warning-bg);
    color: var(--k-warning);
    font-size: var(--k-fs-xs);
    line-height: 1.45;
    padding: 0.5rem 0.625rem;
    display: flex;
    gap: 0.375rem;
}

/* display:flex 会盖掉原生 [hidden]；登录后 applyAuthShell 依赖此规则 */
.k-rail-warn[hidden] {
    display: none !important;
}

.k-rail-warn:hover {
    filter: brightness(1.05);
}
.k-rail-warn::before {
    content: "!";
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 0.875rem;
    height: 0.875rem;
    margin-top: 0.125rem;
    border-radius: 0.1875rem;
    border: 1px solid currentColor;
    font-size: 0.5625rem;
    font-weight: 700;
}

/* ── 4. 快捷三格（整栏三等分）── */
.k-rail-quick {
    display: flex;
    align-items: stretch;
    justify-content: space-between;
    gap: 0.25rem;
    width: 100%;
    box-sizing: border-box;
    padding: 0.25rem 0 0.5rem;
}

.k-rail-quick > a {
    position: relative;
    flex: 1 1 0;
    min-width: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 6px;
    border-radius: 10px;
    border: 0;
    background: transparent;
    color: var(--k-text-muted);
    font-size: 11px;
    font-weight: 600;
    line-height: 1;
    padding: 6px 4px;
    min-height: 52px;
    transition: color 0.15s, background-color 0.15s;
}

.k-rail-quick > a:active {
    transform: scale(0.98);
}
.k-rail-quick > a:hover {
    background: rgb(var(--k-hover-rgb) / 45%);
    color: var(--k-text);
}

/* 快捷格图标改用内联 SVG（裁定 14） */
.k-rail-quick > a > svg {
    color: var(--k-text-muted);
}

.k-rail-quick > a:hover > svg {
    color: var(--k-primary);
}

/* 通知绿点（相对居中图标略偏右上） */
.k-rail-quick > a[data-k-dot]::after {
    content: "";
    position: absolute;
    top: 0.5rem;
    left: calc(50% + 0.375rem);
    width: 0.375rem;
    height: 0.375rem;
    border-radius: 50%;
    background: var(--k-primary);
}

/* ── 5. 历史 / 收藏 Tab + 列表 ── */
.k-rail-library {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.k-rail-tabs {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 6px;
    padding: 4px;
    border-radius: 12px;
    background: rgb(var(--k-hover-rgb) / 35%);
    border: 1px solid var(--k-interactive-border);
}

.k-rail-tabs__btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 36px;
    padding: 6px 8px;
    border-radius: 10px;
    border: 1px solid transparent;
    background: transparent;
    color: var(--k-text-muted);
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: color 0.15s, border-color 0.15s, background-color 0.15s;
}

.k-rail-tabs__btn > svg {
    flex: 0 0 auto;
    opacity: 0.75;
}

.k-rail-tabs__btn strong {
    font-size: 13px;
    font-weight: 700;
    color: inherit;
}

.k-rail-tabs__btn.is-active {
    border-color: rgb(var(--k-primary-rgb) / 55%);
    background: rgb(var(--k-primary-rgb) / 8%);
    color: var(--k-primary);
}

.k-rail-tabs__btn.is-active > svg {
    opacity: 1;
    color: var(--k-primary);
}

.k-rail-panel {
    display: none;
    flex-direction: column;
    gap: 8px;
}

.k-rail-panel.is-active {
    display: flex;
}

.k-rail-list {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.k-rail-all {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    min-height: 40px;
    padding: 8px 12px;
    border-radius: 12px;
    border: 0;
    background: rgb(var(--k-primary-rgb) / 14%);
    color: var(--k-primary);
    font-size: 13px;
    font-weight: 700;
    text-decoration: none;
    transition: background-color 0.15s, filter 0.15s;
}

.k-rail-all:hover {
    background: rgb(var(--k-primary-rgb) / 22%);
    filter: brightness(1.04);
}

.k-rail-all > svg {
    flex: 0 0 auto;
    opacity: 0.85;
}

.k-rail-sesslink {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    min-height: 44px;
    padding: 8px 4px;
    border-top: 1px solid var(--k-border-soft);
    border-bottom: 1px solid var(--k-border-soft);
    color: var(--k-text);
    text-decoration: none;
    transition: color 0.15s;
}

.k-rail-sesslink:hover {
    color: var(--k-primary);
}

.k-rail-sesslink__label {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 14px;
    font-weight: 600;
}

.k-rail-sesslink__label > svg {
    color: var(--k-text-muted);
}

.k-rail-sesslink__meta {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    font-size: 14px;
    color: var(--k-text-muted);
}

.k-rail-sesslink__meta strong {
    font-weight: 700;
    color: var(--k-text);
}

/* ── 6. 列表卡片 ── */
.k-rail-block {
    border-radius: var(--k-radius);
    background: var(--k-card);
    border: 1px solid var(--k-interactive-border);
    padding: 0.5rem 0.625rem;
    display: flex;
    flex-direction: column;
    gap: 0.4375rem;
}
.k-rail-block + .k-rail-block {
    /* 对照 mirror：三块列表之间比上段宫格略疏 */
    margin-top: 0.125rem;
}

.k-rail-block > header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.k-rail-block > header > span,
.k-rail-block__title {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    font-size: var(--k-fs-md);
    color: var(--k-text);
    min-width: 0;
}

/* 区块标题 icon：扁平线性（无青绿方框），对齐下方计数格风格 */
.k-rail-secico {
    flex: 0 0 auto;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--k-primary);
    line-height: 0;
}
.k-rail-secico > svg {
    width: 0.875rem;
    height: 0.875rem;
    display: block;
}

/* 会话记录：固定可视高度，条目多时内部滚动 */
.k-rail-block--sessions > [data-k-sessions] {
    max-height: 12.5rem; /* ~3–4 行 */
    overflow-x: hidden;
    overflow-y: auto;
    overscroll-behavior: contain;
    scrollbar-width: thin;
}
.k-rail-block--sessions > [data-k-sessions].k-rail-empty {
    max-height: none;
    overflow: visible;
}

.k-rail-more {
    font-size: var(--k-fs-sm);
    color: var(--k-primary);
    white-space: nowrap;
}

.k-rail-more:hover {
    color: var(--k-primary-soft);
}

/* 空态：对照 mirror movie-surface — 骨架条 + 文案 */
.k-rail-empty {
    border-radius: calc(var(--k-radius) - 2px);
    border: 1px solid var(--k-interactive-border);
    background: var(--k-card-inner);
    color: var(--k-text-subtle);
    font-size: 0.875rem; /* text-sm */
    line-height: 1.45;
    padding: 0.75rem; /* px-3 py-3 */
    min-height: 3.25rem;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
}
.k-rail-empty__bar {
    display: block;
    width: 2.5rem; /* w-10 */
    height: 0.375rem; /* h-1.5 */
    border-radius: 999px;
    background: rgb(var(--k-hover-rgb) / 80%);
}
.k-rail-empty > p {
    margin: 0;
    font-size: inherit;
    color: inherit;
}

/* ── 7. 底部按钮（贴底） ──
 * 源站：border-t + p-3 + grid grid-cols-2 gap-2，两钮 w-full h-11
 * 左右内边距由 #k-sidebar padding 承担，与上方卡片同宽；勿负 margin 贴边。 */
.k-rail-foot {
    margin-top: auto;
    margin-left: 0;
    margin-right: 0;
    padding-top: 0.75rem; /* 对齐源站 p-3 顶距 */
    width: 100%;
    box-sizing: border-box;
    border-top: 1px solid var(--k-border-soft);
}

/* 已登录：编辑资料 / 注销 两列等宽 */
.k-rail-foot .k-btn {
    width: 100%;
    min-width: 0;
    box-sizing: border-box;
}

.k-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    width: 100%;
    min-height: 2.5rem;
    border: 0;
    border-radius: var(--k-radius);
    font-family: inherit;
    font-size: var(--k-fs-base);
    font-weight: 600;
    cursor: pointer;
    transition: filter 0.15s;
}

.k-btn:hover {
    filter: brightness(1.06);
}

.k-btn--primary {
    background: var(--k-primary);
    color: var(--k-primary-ink, #07140f);
    min-height: 2.75rem; /* h-11 = 44px，对照 mirror */
    font-weight: 900;
    gap: 0.5rem;
}
.k-btn--primary > svg {
    flex: 0 0 auto;
}

/* 次要按钮（加载更多等） */
.k-btn--ghost {
    width: auto;
    min-width: 8rem;
    background: var(--k-tint);
    border: 1px solid var(--k-interactive-border);
    color: var(--k-text-muted);
}

.k-btn--ghost:hover {
    color: var(--k-text);
    border-color: var(--k-interactive-border-hover);
}

.k-btn--outline {
    width: 100%;
    min-height: 44px;
    background: transparent;
    border: 1px solid var(--k-interactive-border);
    color: var(--k-text-muted);
    font-size: 14px;
    font-weight: 600;
    gap: 8px;
}

.k-btn--outline:hover {
    color: var(--k-text);
    border-color: var(--k-interactive-border-hover);
    background: rgb(var(--k-hover-rgb) / 35%);
}

/* 左栏列表对接后的行（真实数据：封面 + 片名 + 时间/进度） */
.k-rail-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px;
    border-radius: 12px;
    background: var(--k-card);
    border: 1px solid var(--k-interactive-border);
    text-decoration: none;
    margin-bottom: 0;
    transition: border-color 0.15s, background-color 0.15s;
}
.k-rail-row:hover {
    background: rgb(var(--k-primary-rgb) / 8%);
}
.k-rail-row:hover .k-rail-row__text strong {
    color: var(--k-primary);
}

.k-rail-row__pic {
    flex: 0 0 auto;
    width: 42px;
    height: 26px;
    border-radius: 4px;
    object-fit: cover;
    background: var(--k-card-inner);
}

.k-rail-row__pic--vert {
    width: 36px;
    height: 52px;
    border-radius: 6px;
}

.k-rail-row__text {
    display: flex;
    flex-direction: column;
    gap: 2px;
    min-width: 0;
    flex: 1;
}

.k-rail-row__text strong {
    font-size: 14px;
    font-weight: 700;
    color: var(--k-text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.k-rail-row__text em {
    font-size: 12px;
    font-style: normal;
    color: var(--k-text-subtle);
}


/* ── home-shell polish 2026-10-11 ── */
.k-rail-level-bar > i {
    transition: width 0.35s ease;
}
.k-rail-block > header > .k-rail-more {
    transition: color 0.15s;
}
.k-rail-mini .k-iconbtn:hover {
    background: rgb(var(--k-primary-rgb) / 12%);
    color: var(--k-primary);
}
.k-btn--primary:active {
    filter: brightness(0.95);
    transform: translateY(1px);
}