/* ===== 星宿食堂 全局公共顶栏样式 ===== */
/* 依赖 theme-tokens.css 中的设计令牌 */

/* ---------- 古风变量兼容映射 ---------- */
/* 将 gufeng 命名空间映射到现有 theme-tokens 变量，保持向后兼容 */
:root {
    --gufeng-bg-card: var(--surface, #ffffff);       /* 卡片/顶栏背景 */
    --gufeng-border: var(--border, #e6eee8);         /* 边框色 */
    --gufeng-shadow: var(--shadow-sm, 0 1px 3px rgba(0, 0, 0, 0.08)); /* 投影 */
    --gufeng-ink: var(--text, #1a1a2e);              /* 文字墨色 */
    --gufeng-bg: var(--surface-soft, #f8faf8);       /* 按钮背景 */
    --gufeng-gold: var(--gold, #C4A35A);             /* 鎏金色点缀 */
    --gufeng-mist: var(--mist, #E8E0D5);             /* 雾色分隔 */
    --gufeng-river: var(--river, #4A7C59);           /* 江水绿主色 */
}

/* ---------- 顶栏主体 ---------- */
.gufeng-topbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 48px;
    display: flex;
    align-items: center;
    padding: 0 16px;
    background: var(--gufeng-bg-card);
    border-bottom: 1px solid var(--gufeng-border);
    box-shadow: var(--gufeng-shadow);
    /* 平滑出现过渡 */
    transition: transform var(--transition-fast, 0.15s cubic-bezier(0.4, 0, 0.2, 1)),
                opacity var(--transition-fast, 0.15s cubic-bezier(0.4, 0, 0.2, 1));
    /* 防止被内容遮挡 */
    isolation: isolate;
}

/* 隐藏状态 */
.gufeng-topbar.is-hidden {
    transform: translateY(-100%);
    opacity: 0;
    pointer-events: none;
}

/* ---------- 世界树按钮 ---------- */
.topbar-worldtree {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: none;
    background: transparent;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: var(--radius-sm, 6px);
    color: var(--gufeng-ink);
    font-size: 18px;
    text-decoration: none;
    /* 古风过渡效果 */
    transition: background var(--transition-fast, 0.15s),
                box-shadow var(--transition-fast, 0.15s),
                transform var(--transition-fast, 0.15s);
}

.topbar-worldtree:hover {
    background: var(--gufeng-bg);
    box-shadow: 0 0 0 1px var(--gufeng-border);
    transform: scale(1.05);
}

.topbar-worldtree:active {
    transform: scale(0.95);
    background: var(--gufeng-mist);
}

/* ---------- LOGO ---------- */
.topbar-logo {
    height: 28px;
    border-radius: var(--radius-sm, 6px);
    object-fit: contain;
    /* 避免图片加载时的闪烁 */
    vertical-align: middle;
}

/* 内联SVG古风LOGO容器 */
.topbar-logo-fallback {
    height: 28px;
    width: 28px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

.topbar-logo-fallback svg {
    width: 100%;
    height: 100%;
}

/* ---------- 页面标题 ---------- */
.topbar-title {
    flex: 1;
    text-align: center;
    font-family: 'KaiTi', 'STKaiti', serif;
    color: var(--gufeng-ink);
    font-size: 16px;
    font-weight: 500;
    letter-spacing: 1px;
    /* 超长标题截断 */
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    padding: 0 8px;
    /* 平滑切换过渡 */
    transition: opacity var(--transition-fast, 0.15s);
}

/* ---------- 右侧区域 ---------- */
.topbar-right {
    margin-left: auto;
    display: flex;
    align-items: center;
    gap: 12px;
}

/* ---------- 用户头像按钮 ---------- */
.topbar-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 2px solid var(--gufeng-border);
    background: var(--gufeng-bg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    color: var(--gufeng-ink);
    font-size: 16px;
    /* 古风过渡 */
    transition: border-color var(--transition-fast, 0.15s),
                box-shadow var(--transition-fast, 0.15s),
                transform var(--transition-fast, 0.15s);
    flex-shrink: 0;
}

.topbar-avatar:hover {
    border-color: var(--gufeng-gold);
    box-shadow: 0 0 0 2px rgba(196, 163, 90, 0.2);
    transform: scale(1.08);
}

.topbar-avatar:active {
    transform: scale(0.95);
}



/* ---------- 返回按钮 ---------- */
.topbar-back {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--gufeng-ink);
    text-decoration: none;
    padding: 4px 8px;
    border-radius: var(--radius-sm, 6px);
    transition: background var(--transition-fast, 0.15s),
                color var(--transition-fast, 0.15s),
                transform var(--transition-fast, 0.15s);
}

.topbar-back:hover {
    background: var(--gufeng-bg);
    color: var(--gufeng-gold);
    box-shadow: 0 0 0 1px var(--gufeng-border);
    transform: scale(1.05);
}

.topbar-back:active {
    transform: scale(0.95);
    background: var(--gufeng-mist);
}

.topbar-back svg {
    display: block;
}

/* ---------- 顶栏内间距调整 ---------- */
.topbar-item-gap {
    width: 12px;
    flex-shrink: 0;
}

/* ---------- V0.2.0F 工具按钮（侧栏/右侧栏/搜索） ---------- */
.topbar-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border: none;
    border-radius: var(--radius-sm, 6px);
    background: transparent;
    color: var(--gufeng-ink);
    cursor: pointer;
    flex-shrink: 0;
    transition: background var(--transition-fast, 0.15s),
                color var(--transition-fast, 0.15s),
                transform var(--transition-fast, 0.15s);
}

.topbar-icon-btn:hover {
    background: var(--gufeng-bg);
    color: var(--gufeng-gold);
    box-shadow: 0 0 0 1px var(--gufeng-border);
    transform: scale(1.05);
}

.topbar-icon-btn:active {
    transform: scale(0.95);
    background: var(--gufeng-mist);
}

.topbar-icon-btn svg {
    display: block;
    pointer-events: none;
}

/* ---------- 响应式：移动端适配 ---------- */
@media screen and (max-width: 768px) {
    .gufeng-topbar {
        height: 44px;
        padding: 0 12px;
    }

    .topbar-logo {
        height: 22px;
    }

    .topbar-logo-fallback {
        height: 22px;
        width: 22px;
    }

    .topbar-title {
        font-size: 14px;
        padding: 0 4px;
        letter-spacing: 0.5px;
    }

    .topbar-avatar {
        width: 28px;
        height: 28px;
        font-size: 14px;
    }
    .topbar-back {
        padding: 4px 6px;
    }

    .topbar-back svg {
        width: 16px;
        height: 16px;
    }

    .topbar-worldtree {
        padding: 4px 6px;
        font-size: 16px;
    }

    .topbar-right {
        gap: 8px;
    }

    .topbar-item-gap {
        width: 8px;
    }
}

/* ---------- 无障碍：焦点可见样式 ---------- */
.topbar-worldtree:focus-visible,
.topbar-avatar:focus-visible,
.topbar-back:focus-visible {
    outline: 2px solid var(--gufeng-gold);
    outline-offset: 2px;
}

/* ---------- prefers-reduced-motion ---------- */
@media (prefers-reduced-motion: reduce) {
    .gufeng-topbar,
    .topbar-worldtree,
    .topbar-avatar,
    .topbar-title {
        transition: none;
    }
}

/* ---------- 用户头像按钮（V17增强） ---------- */
.topbar-avatar-wrap {
    position: relative;
}
.topbar-avatar-btn {
    width: 32px; height: 32px;
    border-radius: 50%;
    border: 2px solid var(--gufeng-border);
    background: var(--gufeng-bg);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    color: var(--gufeng-ink);
    padding: 0;
    transition: border-color 0.15s, box-shadow 0.15s, transform 0.15s;
    flex-shrink: 0;
}
.topbar-avatar-btn:hover {
    border-color: var(--gufeng-gold);
    box-shadow: 0 0 0 2px rgba(196, 163, 90, 0.2);
    transform: scale(1.08);
}
.topbar-avatar-btn svg { display: block; }

/* ---------- 用户下拉菜单 ---------- */
.topbar-user-menu {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    width: 220px;
    background: var(--gufeng-bg-card);
    border: 1px solid var(--gufeng-border);
    border-radius: var(--radius-md, 12px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.12), 0 2px 6px rgba(0,0,0,0.06);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px) scale(0.96);
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    z-index: 1100;
    overflow: hidden;
}
.topbar-user-menu.tum-open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

/* 菜单头部 */
.tum-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 14px 14px 10px;
    background: var(--gufeng-bg);
    border-bottom: 1px solid var(--gufeng-border);
}
.tum-avatar {
    width: 36px; height: 36px;
    border-radius: 50%;
    background: var(--gufeng-bg-card);
    display: flex; align-items: center; justify-content: center;
    color: var(--gufeng-ink);
    flex-shrink: 0;
}
.tum-avatar svg { width: 100%; height: 100%; }
.tum-info { display: flex; flex-direction: column; }
.tum-name { font-size: 14px; font-weight: 600; color: var(--gufeng-ink); }
.tum-desc { font-size: 11px; color: #999; margin-top: 2px; }

/* 菜单项 */
.tum-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 14px;
    color: var(--gufeng-ink);
    text-decoration: none;
    font-size: 13px;
    cursor: pointer;
    transition: background 0.15s;
}
.tum-item:hover {
    background: var(--gufeng-bg);
    color: var(--gufeng-river);
}
.tum-item svg { flex-shrink: 0; opacity: 0.6; }
.tum-item:hover svg { opacity: 1; }

.tum-divider {
    height: 1px;
    background: var(--gufeng-border);
    margin: 4px 0;
}

.tum-login {
    color: var(--gufeng-river);
    font-weight: 500;
}

/* 移动端适配 */
@media screen and (max-width: 768px) {
    .topbar-avatar-btn {
        width: 28px; height: 28px;
    }
    .topbar-user-menu {
        width: 200px;
        right: -8px;
    }
}