/* === 主题变量 === */
:root {
    --bg: #0d1117;
    --bg-card: #161b22;
    --border: #30363d;
    --text: #c9d1d9;
    --text-secondary: #8b949e;
    --text-muted: #484f58;
    --accent: #58a6ff;
    --green: #3fb950;
    --panel-bg: #161b22;
    --select-bg: #0d1117;
    --hover-row: #1c2129;
    --sidebar-w: 240px;
    --sidebar-collapsed-w: 52px;
}

[data-theme="light"] {
    --bg: #f6f8fa;
    --bg-card: #ffffff;
    --border: #d0d7de;
    --text: #24292f;
    --text-secondary: #656d76;
    --text-muted: #8c959f;
    --accent: #0969da;
    --green: #1a7f37;
    --panel-bg: #ffffff;
    --select-bg: #f6f8fa;
    --hover-row: #f3f4f6;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    height: 100vh;
    display: flex;
    overflow: hidden;
    transition: background 0.3s, color 0.3s;
}

/* === 左侧菜单 === */
.sidebar {
    width: var(--sidebar-w);
    min-width: var(--sidebar-w);
    height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    transition: width 0.2s ease, min-width 0.2s ease;
    overflow: hidden;
    z-index: 10;
}

.sidebar.collapsed {
    width: var(--sidebar-collapsed-w);
    min-width: var(--sidebar-collapsed-w);
}

/* 顶部：汉堡按钮 + 品牌 */
.sidebar-top {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 14px 10px;
    height: 52px;
}

.menu-toggle {
    width: 32px;
    min-width: 32px;
    height: 32px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.15s, color 0.15s;
}

.menu-toggle:hover {
    background: var(--hover-row);
    color: var(--text);
}

.sidebar-brand {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
}

/* 搜索框 */
.sidebar-search {
    position: relative;
    margin: 4px 14px 8px;
}

.search-icon {
    position: absolute;
    left: 10px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: 7px 10px 7px 32px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--select-bg);
    color: var(--text);
    font-size: 0.85rem;
    outline: none;
    transition: border-color 0.15s;
}

.search-input:focus {
    border-color: var(--accent);
}

.search-input::placeholder {
    color: var(--text-muted);
}

/* 菜单列表 */
.menu-list {
    flex: 1;
    overflow-y: auto;
    padding: 4px 8px;
}

.menu-item {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 10px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
    text-align: left;
    text-decoration: none;
    white-space: nowrap;
}

.menu-item:hover {
    background: var(--hover-row);
    color: var(--text);
}

.menu-item.active {
    background: var(--accent);
    color: #fff;
}

.menu-item svg {
    min-width: 18px;
}

.menu-item.hidden {
    display: none;
}

/* 底部操作 */
.sidebar-bottom {
    border-top: 1px solid var(--border);
    padding: 6px 8px;
}

.sidebar-action {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    padding: 9px 10px;
    border: none;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: background 0.1s, color 0.1s;
}

.sidebar-action:hover {
    background: var(--hover-row);
    color: var(--text);
}

/* 折叠态隐藏文字 */
.sidebar.collapsed .sidebar-brand,
.sidebar.collapsed .sidebar-search,
.sidebar.collapsed .menu-item span,
.sidebar.collapsed .sidebar-action-label {
    display: none;
}

.sidebar.collapsed .sidebar-top { padding: 14px 10px 10px; justify-content: center; }
.sidebar.collapsed .menu-item { justify-content: center; padding: 9px 0; }
.sidebar.collapsed .sidebar-action { justify-content: center; padding: 9px 0; }
.sidebar.collapsed .sidebar-bottom { padding: 6px 4px; }

/* === 设置面板 === */
.settings-panel {
    position: fixed;
    left: calc(var(--sidebar-w) + 12px);
    bottom: 60px;
    width: 220px;
    background: var(--panel-bg);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 14px;
    z-index: 99;
    box-shadow: 0 8px 24px rgba(0,0,0,0.25);
    transition: opacity 0.15s, transform 0.15s;
}

.sidebar.collapsed ~ .settings-panel {
    left: calc(var(--sidebar-collapsed-w) + 12px);
}

.settings-panel.hidden {
    opacity: 0;
    transform: translateY(8px);
    pointer-events: none;
}

.settings-section {
    margin-bottom: 12px;
}

.settings-section:last-child { margin-bottom: 0; }

.settings-label {
    display: block;
    font-size: 0.78rem;
    color: var(--text-secondary);
    margin-bottom: 5px;
    font-weight: 500;
}

.settings-select {
    width: 100%;
    padding: 7px 8px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--select-bg);
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    outline: none;
    transition: border-color 0.15s;
}

.settings-select:focus { border-color: var(--accent); }

/* === 右侧内容 === */
.content {
    flex: 1;
    height: 100vh;
    overflow-y: auto;
    padding: 40px 48px;
}

.welcome {
    max-width: 560px;
    margin: 80px auto 0;
    text-align: center;
}

.welcome-icon { font-size: 3rem; margin-bottom: 16px; }

.welcome h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text);
}

.welcome p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* === 工具占位页 === */
.tool-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    height: 100%;
    text-align: center;
    color: var(--text-secondary);
}

.tool-placeholder svg { margin-bottom: 16px; color: var(--text-muted); }

.tool-placeholder h3 {
    font-size: 1.1rem;
    color: var(--text);
    margin-bottom: 6px;
}

.tool-placeholder p { font-size: 0.9rem; }

/* === JSON 工具 === */
.json-tool {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.json-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.jt-btn {
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.85rem;
    cursor: pointer;
    transition: background 0.1s, border-color 0.1s;
}

.jt-btn:hover { border-color: var(--accent); }

.jt-btn-primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.jt-btn-primary:hover { opacity: 0.9; }

.jt-msg { font-size: 0.82rem; margin-left: auto; }
.jt-msg-ok { color: var(--green); }
.jt-msg-error { color: #f85149; }

.json-panes {
    flex: 1;
    display: flex;
    min-height: 0;
}

.json-pane {
    display: flex;
    flex-direction: column;
    min-width: 0;
    overflow: hidden;
}

.jt-resizer {
    width: 6px;
    cursor: col-resize;
    background: transparent;
    flex-shrink: 0;
    position: relative;
    transition: background 0.15s;
}

.jt-resizer:hover,
.jt-resizer:active {
    background: var(--accent);
}

.jt-editor {
    width: 100%;
    height: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    color: var(--text);
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.85rem;
    line-height: 1.55;
    resize: none;
    outline: none;
    tab-size: 2;
}

.jt-editor:focus { border-color: var(--accent); }

.jt-output {
    height: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    overflow: auto;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.85rem;
    line-height: 1.55;
}

.jt-error {
    color: #f85149;
    white-space: pre-wrap;
    word-break: break-all;
}

/* tree view */
.jt-row {
    line-height: 1.7;
    white-space: nowrap;
}

.jt-toggle {
    display: inline-block;
    width: 16px;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 0.7rem;
    user-select: none;
    transition: transform 0.15s;
}

.jt-collapsed > .jt-toggle { transform: rotate(-90deg); }

.jt-collapsed + .jt-children,
.jt-collapsible.jt-collapsed + .jt-children { display: none; }

.jt-children { padding-left: 20px; }

.jt-key { color: var(--accent); }
.jt-string { color: #a5d6ff; }
.jt-number { color: #79c0ff; }
.jt-bool { color: #ffa657; }
.jt-null { color: #8b949e; font-style: italic; }
.jt-bracket { color: var(--text-muted); }
.jt-count { color: var(--text-muted); font-size: 0.8rem; margin-left: 4px; }
.jt-comma { color: var(--text-muted); }

[data-theme="light"] .jt-string { color: #0a3069; }
[data-theme="light"] .jt-number { color: #0550ae; }
[data-theme="light"] .jt-bool { color: #cf222e; }

/* === 时间戳工具 === */
.ts-tool {
    max-width: 680px;
    margin: 0 auto;
}

.ts-now {
    text-align: center;
    padding: 20px 0 24px;
    display: flex;
    flex-direction: column;
    gap: 4px;
    position: relative;
}

.ts-now-label {
    font-size: 0.82rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.ts-now-value {
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.5px;
    user-select: text;
    cursor: pointer;
}

.ts-now-date { color: var(--text); }

.ts-now-time { color: var(--text); }

.ts-now-ms {
    color: var(--text-secondary);
    font-size: 0.85em;
    font-weight: 400;
}

.ts-now-tz {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.ts-input-wrap { margin-bottom: 20px; }

.ts-input {
    width: 100%;
    padding: 12px 16px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    color: var(--text);
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.15s;
}

.ts-input:focus { border-color: var(--accent); }

.ts-input::placeholder { color: var(--text-muted); }

.ts-results { min-height: 60px; }

.ts-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.ts-row {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.ts-row:last-child { border-bottom: none; }

.ts-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 80px;
    flex-shrink: 0;
}

.ts-val {
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.88rem;
    color: var(--text);
    flex: 1;
    word-break: break-all;
}

.ts-copy {
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.78rem;
    cursor: pointer;
    flex-shrink: 0;
    transition: background 0.1s, color 0.1s;
}

.ts-copy:hover { background: var(--hover-row); color: var(--text); }

.ts-toast {
    position: absolute;
    top: -8px;
    right: -8px;
    background: var(--accent);
    color: #fff;
    font-size: 0.72rem;
    padding: 2px 8px;
    border-radius: 4px;
    pointer-events: none;
    animation: ts-toast-in 0.2s ease;
}

@keyframes ts-toast-in {
    from { opacity: 0; transform: translateY(6px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* === 统一历史记录栏 === */
.history-bar {
    margin-top: 16px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 6px;
}

.history-label {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-right: 4px;
    flex-shrink: 0;
}

.history-chip {
    padding: 3px 10px;
    border: 1px solid var(--border);
    border-radius: 14px;
    background: var(--bg-card);
    color: var(--text-secondary);
    font-size: 0.78rem;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    cursor: pointer;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    transition: border-color 0.15s, color 0.15s;
}

.history-chip:hover {
    border-color: var(--accent);
    color: var(--text);
}

.history-chip[disabled] {
    opacity: 0.6;
    cursor: default;
    pointer-events: none;
}


.ts-error {
    text-align: center;
    padding: 24px;
    color: #f85149;
    font-size: 0.9rem;
}

/* === URL 编码工具 === */
.enc-tool {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.enc-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.enc-panes {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

.enc-textarea {
    width: 100%;
    flex: 1;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    color: var(--text);
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.9rem;
    line-height: 1.55;
    resize: none;
    outline: none;
    min-height: 120px;
}

.enc-textarea:focus { border-color: var(--accent); }

.enc-textarea::placeholder { color: var(--text-muted); }

/* === Base64 工具 === */
.b64-tool { height: 100%; display: flex; flex-direction: column; }

.b64-tabs {
    display: flex;
    gap: 0;
    border-bottom: 2px solid var(--border);
    margin-bottom: 14px;
}

.b64-tab {
    padding: 8px 20px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -2px;
    transition: color 0.15s, border-color 0.15s;
}

.b64-tab:hover { color: var(--text); }
.b64-tab.active { color: var(--accent); border-bottom-color: var(--accent); }

.b64-pane { flex: 1; display: flex; flex-direction: column; min-height: 0; }
.b64-pane.hidden { display: none; }

.b64-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 12px;
}

.b64-panes {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
    min-height: 0;
}

.b64-textarea {
    width: 100%;
    flex: 1;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    color: var(--text);
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.9rem;
    line-height: 1.55;
    resize: none;
    outline: none;
    min-height: 120px;
}

.b64-textarea:focus { border-color: var(--accent); }
.b64-textarea::placeholder { color: var(--text-muted); }

.b64-file-grid {
    flex: 1;
    display: flex;
    gap: 14px;
    min-height: 0;
}

.b64-file-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.b64-dropzone {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 24px;
    border: 2px dashed var(--border);
    border-radius: 12px;
    color: var(--text-muted);
    text-align: center;
    transition: border-color 0.15s, background 0.15s;
    min-height: 140px;
}

.b64-dropzone:hover, .b64-dropzone.b64-dragover {
    border-color: var(--accent);
    background: var(--hover-row);
}

.b64-drop-text { font-size: 0.9rem; color: var(--text-secondary); }
.b64-or { font-size: 0.8rem; }

.b64-file-btn {
    display: inline-block;
    cursor: pointer;
}

.b64-file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 0.88rem;
}

.b64-file-info.hidden { display: none; }

#b64-file-name { flex: 1; color: var(--text); font-family: "SF Mono", monospace; }
#b64-file-size { color: var(--text-muted); font-size: 0.8rem; }

.b64-dl-btn { width: 100%; }

/* === 文本对比工具 === */
.diff-tool { height: 100%; display: flex; flex-direction: column; }

.diff-toolbar {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 12px;
}

.diff-panes {
    display: flex;
    gap: 12px;
    min-height: 0;
    flex: 0 0 40%;
}

.diff-pane {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.diff-pane-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 6px;
    font-weight: 500;
}

.diff-textarea {
    width: 100%;
    flex: 1;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    background: var(--select-bg);
    color: var(--text);
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    resize: none;
    outline: none;
    min-height: 100px;
}

.diff-textarea:focus { border-color: var(--accent); }
.diff-textarea::placeholder { color: var(--text-muted); }

.diff-result {
    flex: 1;
    margin-top: 14px;
    overflow-y: auto;
    min-height: 0;
}

.diff-empty {
    text-align: center;
    padding: 24px;
    color: var(--text-muted);
}

.diff-output {
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.83rem;
    line-height: 1.55;
}

.diff-line {
    display: flex;
    padding: 1px 0;
}

.diff-ln {
    width: 40px;
    min-width: 40px;
    text-align: right;
    padding-right: 10px;
    color: var(--text-muted);
    font-size: 0.78rem;
    user-select: none;
}

.diff-txt {
    flex: 1;
    white-space: pre-wrap;
    word-break: break-all;
    padding-right: 10px;
    color: var(--text);
}

.diff-eq { background: transparent; }
.diff-add { background: rgba(63,185,80,0.12); }
.diff-rm  { background: rgba(248,81,73,0.12); }
.diff-add .diff-txt { color: #3fb950; }
.diff-rm  .diff-txt { color: #f85149; }

[data-theme="light"] .diff-add { background: rgba(26,127,55,0.08); }
[data-theme="light"] .diff-rm  { background: rgba(207,34,46,0.08); }
[data-theme="light"] .diff-add .diff-txt { color: #1a7f37; }
[data-theme="light"] .diff-rm  .diff-txt { color: #cf222e; }

/* === 文件详情工具 === */
.fi-tool {
    max-width: 700px;
    margin: 0 auto;
}

.fi-dropzone {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 40px 24px;
    border: 2px dashed var(--border);
    border-radius: 12px;
    color: var(--text-muted);
    text-align: center;
    transition: border-color 0.15s, background 0.15s;
}

.fi-dropzone:hover, .fi-dropzone.fi-dragover {
    border-color: var(--accent);
    background: var(--hover-row);
}

.fi-dropzone.hidden { display: none; }

.fi-drop-text { font-size: 0.95rem; color: var(--text-secondary); }
.fi-or { font-size: 0.8rem; }

.fi-loading {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
    font-size: 0.95rem;
}
.fi-loading.hidden { display: none; }

.fi-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
}

.fi-row {
    display: flex;
    align-items: center;
    padding: 10px 16px;
    border-bottom: 1px solid var(--border);
    gap: 12px;
}

.fi-row:last-child { border-bottom: none; }

.fi-row-col { flex-direction: column; align-items: flex-start; }

.fi-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    min-width: 90px;
    flex-shrink: 0;
}

.fi-val {
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.85rem;
    color: var(--text);
    flex: 1;
    word-break: break-all;
}

.fi-base64-preview {
    width: 100%;
    padding: 10px 12px;
    background: var(--select-bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-family: "SF Mono", "Fira Code", "Cascadia Code", monospace;
    font-size: 0.78rem;
    line-height: 1.4;
    color: var(--text-secondary);
    white-space: pre-wrap;
    word-break: break-all;
    max-height: 100px;
    overflow-y: auto;
    margin-top: 4px;
}

/* === SEO 静态内容（JS 加载前可抓取） === */
.seo-content {
    max-width: 860px;
    margin: 0 auto;
    padding: 32px 24px;
    color: var(--text-secondary);
    line-height: 1.7;
}

.seo-content h1,
.seo-content h2,
.seo-content h3 {
    color: var(--text);
    line-height: 1.25;
    margin: 0 0 12px;
}

.seo-content h1 {
    font-size: 2rem;
}

.seo-content h2 {
    font-size: 1.25rem;
    margin-top: 24px;
}

.seo-content h3 {
    font-size: 1rem;
    margin-top: 16px;
}

.seo-content ul {
    margin-left: 20px;
}

.seo-content a {
    color: var(--accent);
    text-decoration: none;
}

.seo-content a:hover {
    text-decoration: underline;
}