/* AI Skills Hub - GitHub PHP 风格主题 */
:root {
    --color-fg-default: #1f2328;
    --color-fg-muted: #656d76;
    --color-fg-subtle: #6e7781;
    --color-canvas-default: #ffffff;
    --color-canvas-subtle: #f6f8fa;
    --color-canvas-inset: #f6f8fa;
    --color-border-default: #d0d7de;
    --color-border-muted: #d8dee4;
    --color-accent-fg: #0969da;
    --color-accent-emphasis: #0969da;
    --color-success-fg: #1a7f37;
    --color-success-emphasis: #2da44e;
    --color-danger-fg: #cf222e;
    --color-danger-emphasis: #cf222e;
    --color-header-bg: #24292f;
    --color-header-fg: #f0f6fc;
    --color-btn-primary-bg: #1f883d;
    --color-btn-primary-hover: #1a7f37;
    --color-btn-bg: #f6f8fa;
    --color-btn-hover-bg: #f3f4f6;
    --color-btn-border: rgba(31, 35, 40, 0.15);
    --color-attention-fg: #9a6700;
    --color-attention-bg: #fff8c5;
    --shadow-sm: 0 1px 0 rgba(31, 35, 40, 0.04);
    --shadow-md: 0 3px 6px rgba(140, 149, 159, 0.15);
    --radius: 6px;
    --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC", "Hiragino Sans GB",
            "Microsoft YaHei", "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, "Liberation Mono", monospace;
}

* { box-sizing: border-box; }

html, body {
    margin: 0;
    padding: 0;
    font-family: var(--font);
    font-size: 14px;
    line-height: 1.5;
    color: var(--color-fg-default);
    background: var(--color-canvas-default);
}

a { color: var(--color-accent-fg); text-decoration: none; }
a:hover { text-decoration: underline; }

.hidden { display: none !important; }

/* ===== 顶部导航 ===== */
.gh-header {
    background: var(--color-header-bg);
    color: var(--color-header-fg);
    border-bottom: 1px solid #1b1f24;
}
.gh-header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 12px 24px;
    display: flex;
    align-items: center;
    gap: 16px;
}
.gh-logo {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-header-fg);
    font-weight: 600;
    font-size: 15px;
}
.gh-logo:hover { text-decoration: none; color: #fff; }
.gh-logo-text { letter-spacing: 0.2px; }
.gh-nav { flex: 1; }
.gh-badge {
    display: inline-block;
    padding: 2px 8px;
    font-size: 12px;
    color: #b1bac4;
    border: 1px solid rgba(240, 246, 252, 0.2);
    border-radius: 20px;
}
.gh-header-right { display: flex; gap: 8px; }

/* ===== 按钮 ===== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 12px;
    font-size: 13px;
    font-weight: 500;
    line-height: 20px;
    border-radius: var(--radius);
    border: 1px solid var(--color-btn-border);
    background: var(--color-btn-bg);
    color: var(--color-fg-default);
    cursor: pointer;
    transition: background 0.12s, border-color 0.12s;
    white-space: nowrap;
}
.btn:hover { background: var(--color-btn-hover-bg); text-decoration: none; }
.btn:active { transform: translateY(0.5px); }
.btn svg { flex-shrink: 0; }
.btn-primary {
    background: var(--color-btn-primary-bg);
    color: #fff;
    border-color: rgba(31, 35, 40, 0.15);
}
.btn-primary:hover { background: var(--color-btn-primary-hover); color: #fff; }
.btn-danger {
    background: #fff;
    color: var(--color-danger-fg);
    border-color: var(--color-danger-emphasis);
}
.btn-danger:hover { background: #ffeef0; }
.btn-outline {
    background: #f6f8fa;
    color: var(--color-fg-default);
}
.btn-sm { padding: 3px 10px; font-size: 12px; }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }

/* ===== 主区域 ===== */
.gh-main {
    max-width: 1280px;
    margin: 0 auto;
    padding: 24px 24px 80px;
}

.repo-title {
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 20px;
    padding-bottom: 0;
    flex-wrap: wrap;
}
.repo-icon { color: var(--color-fg-muted); }
.repo-name {
    font-size: 20px;
    font-weight: 600;
    margin: 0;
    color: var(--color-accent-fg);
}
.repo-visibility {
    font-size: 12px;
    padding: 0 7px;
    height: 22px;
    line-height: 20px;
    border: 1px solid var(--color-border-default);
    border-radius: 20px;
    color: var(--color-fg-muted);
}
.repo-desc { color: var(--color-fg-muted); font-size: 13px; margin-left: 8px; }

/* ===== 工具栏 ===== */
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
    flex-wrap: wrap;
    gap: 12px;
}
.crumbs { display: flex; align-items: center; flex-wrap: wrap; gap: 4px; }
.crumb {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 4px 8px;
    border-radius: var(--radius);
    color: var(--color-accent-fg);
    font-weight: 500;
}
.crumb:hover { background: var(--color-canvas-subtle); text-decoration: none; }
.crumb-root { color: var(--color-fg-default); }
.crumb-sep { color: var(--color-fg-subtle); }
.toolbar-actions { display: flex; gap: 8px; }

/* ===== 文件列表框 ===== */
.file-box {
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius);
    overflow: hidden;
    background: var(--color-canvas-default);
}
.file-box-header {
    display: grid;
    grid-template-columns: 40px 1fr 180px 120px;
    align-items: center;
    padding: 10px 16px;
    background: var(--color-canvas-subtle);
    border-bottom: 1px solid var(--color-border-default);
    font-size: 13px;
    color: var(--color-fg-muted);
    font-weight: 600;
}
.commit-msg { color: var(--color-fg-default); }
.commit-time { text-align: right; }

.file-list-header {
    display: grid;
    grid-template-columns: 40px 1fr 180px 120px;
    padding: 8px 16px;
    background: var(--color-canvas-subtle);
    border-bottom: 1px solid var(--color-border-muted);
    font-size: 12px;
    color: var(--color-fg-muted);
    font-weight: 600;
}
.time-cell { text-align: right; }

.file-list {
    list-style: none;
    margin: 0;
    padding: 0;
}
.file-row {
    display: grid;
    grid-template-columns: 40px 1fr 180px 120px;
    align-items: center;
    padding: 8px 16px;
    border-bottom: 1px solid var(--color-border-muted);
    transition: background 0.08s;
}
.file-row:last-child { border-bottom: none; }
.file-row:hover { background: var(--color-canvas-subtle); }
.file-row.file-loading { color: var(--color-fg-muted); justify-content: center; display: flex; padding: 24px; }
.file-row.file-empty { color: var(--color-fg-muted); justify-content: center; display: flex; padding: 32px; }

.select-cell { display: flex; justify-content: center; }
.name-cell { display: flex; align-items: center; gap: 8px; min-width: 0; }
.name-cell a { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.msg-cell { color: var(--color-fg-muted); font-size: 13px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.time-cell { color: var(--color-fg-muted); font-size: 13px; text-align: right; }

.gh-checkbox { width: 16px; height: 16px; cursor: pointer; accent-color: var(--color-accent-fg); }

/* 文件图标 */
.ico {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    display: inline-block;
    background-size: contain;
    background-repeat: no-repeat;
    background-position: center;
}
.ico-dir { color: #54aeff; }
.ico-archive { color: #bf3989; }
.ico-image { color: #1f883d; }
.ico-doc { color: #0969da; }
.ico-code { color: #6e40c9; }
.ico-audio { color: #bf8700; }
.ico-video { color: #cf222e; }
.ico-file { color: var(--color-fg-muted); }
.file-size-pill {
    font-size: 11px;
    color: var(--color-fg-muted);
    padding: 0 6px;
    border: 1px solid var(--color-border-default);
    border-radius: 10px;
    margin-left: 6px;
}

.row-name { display: flex; align-items: center; gap: 8px; min-width: 0; }
.row-name a { font-weight: 400; }
.row-name .is-dir-link { font-weight: 500; }

/* 返回上级 */
.up-link { color: var(--color-fg-default); }
.up-link:hover { color: var(--color-accent-fg); }

/* ===== 批量操作栏 ===== */
.batch-bar {
    position: sticky;
    bottom: 16px;
    margin-top: 16px;
    background: var(--color-canvas-default);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 10px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    z-index: 10;
}
.batch-count { font-size: 13px; color: var(--color-fg-default); font-weight: 500; }
.batch-actions { display: flex; gap: 8px; flex-wrap: wrap; }

/* ===== 拖拽遮罩 ===== */
.drop-overlay {
    position: fixed;
    inset: 0;
    background: rgba(9, 105, 218, 0.12);
    backdrop-filter: blur(2px);
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}
.drop-inner {
    border: 2px dashed var(--color-accent-fg);
    border-radius: 12px;
    padding: 48px 64px;
    text-align: center;
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-accent-fg);
}
.drop-inner p { margin: 12px 0 0; font-weight: 500; font-size: 15px; }

/* ===== 模态框 ===== */
.modal { position: fixed; inset: 0; z-index: 1100; display: flex; align-items: center; justify-content: center; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(31, 35, 40, 0.5); }
.modal-dialog {
    position: relative;
    background: var(--color-canvas-default);
    border-radius: 12px;
    box-shadow: var(--shadow-md), 0 0 40px rgba(0,0,0,0.2);
    width: 440px;
    max-width: calc(100vw - 32px);
    max-height: calc(100vh - 64px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}
.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 18px;
    border-bottom: 1px solid var(--color-border-muted);
}
.modal-header h3 { margin: 0; font-size: 15px; font-weight: 600; }
.modal-close {
    background: none; border: none; cursor: pointer; font-size: 22px;
    color: var(--color-fg-muted); line-height: 1; padding: 0 4px;
}
.modal-close:hover { color: var(--color-fg-default); }
.modal-body { padding: 18px; overflow-y: auto; }
.modal-footer {
    padding: 12px 18px;
    border-top: 1px solid var(--color-border-muted);
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    background: var(--color-canvas-subtle);
}
.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-weight: 600; font-size: 13px; margin-bottom: 6px; }
.form-input, .form-select {
    width: 100%;
    padding: 6px 10px;
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius);
    font-size: 14px;
    font-family: var(--font);
    background: var(--color-canvas-default);
    color: var(--color-fg-default);
}
.form-input:focus, .form-select:focus {
    outline: none;
    border-color: var(--color-accent-fg);
    box-shadow: 0 0 0 3px rgba(9, 105, 218, 0.15);
}
.form-hint { font-size: 12px; color: var(--color-fg-muted); margin-top: 4px; }
.format-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 8px; }
.format-opt {
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius);
    padding: 10px;
    text-align: center;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    transition: all 0.12s;
}
.format-opt:hover { border-color: var(--color-accent-fg); }
.format-opt.active {
    border-color: var(--color-accent-fg);
    background: rgba(9, 105, 218, 0.08);
    color: var(--color-accent-fg);
}
.format-opt small { display: block; font-weight: 400; font-size: 11px; color: var(--color-fg-muted); margin-top: 2px; }

/* ===== Toast ===== */
.toast {
    position: fixed;
    top: 80px;
    right: 24px;
    z-index: 1200;
    padding: 12px 18px;
    border-radius: var(--radius);
    background: var(--color-fg-default);
    color: #fff;
    font-size: 13px;
    font-weight: 500;
    box-shadow: var(--shadow-md);
    max-width: 380px;
    animation: toastIn 0.2s ease;
}
.toast.toast-error { background: var(--color-danger-emphasis); }
.toast.toast-success { background: var(--color-success-emphasis); }
@keyframes toastIn { from { opacity: 0; transform: translateY(-8px); } to { opacity: 1; transform: none; } }

/* ===== 上传进度 ===== */
.upload-progress {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1200;
    width: 340px;
    background: var(--color-canvas-default);
    border: 1px solid var(--color-border-default);
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 12px 14px;
}
.upload-progress .up-title { font-weight: 600; font-size: 13px; margin-bottom: 8px; display: flex; justify-content: space-between; }
.upload-item { font-size: 12px; color: var(--color-fg-muted); padding: 3px 0; display: flex; justify-content: space-between; gap: 8px; }
.upload-item .up-name { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-item.done { color: var(--color-success-fg); }
.upload-item.fail { color: var(--color-danger-fg); }

/* ===== 响应式 ===== */
@media (max-width: 768px) {
    .file-box-header, .file-list-header, .file-row {
        grid-template-columns: 36px 1fr 80px;
    }
    .msg-cell, .commit-msg { display: none; }
    .gh-header-inner { padding: 10px 14px; }
    .gh-main { padding: 16px 14px 80px; }
    .repo-desc { display: none; }
}