/* 藤のnetdisk —— 明亮暖橙主题（参考芒果英语雅思备考平台风格） */
:root {
  --bg: #f6f7fb;
  --bg-soft: #fdf8f0;
  --card: #ffffff;
  --card-soft: #fbfcfe;
  --line: #eceef4;
  --line-strong: #e2e5ee;
  --text: #1f2430;
  --text-dim: #5b6472;
  --text-faint: #98a1b3;
  --orange: #f59e0b;
  --orange-strong: #ea8c00;
  --orange-soft: #fff4e0;
  --orange-line: #ffe0b0;
  --green: #22c55e;
  --green-soft: #e9f9ef;
  --red: #ef4444;
  --red-soft: #fdecec;
  --blue: #3b82f6;
  --blue-soft: #eaf2ff;
  --grad: linear-gradient(135deg, #ffb340 0%, #f59e0b 100%);
  --radius: 18px;
  --radius-sm: 11px;
  --shadow-sm: 0 4px 16px rgba(31, 36, 48, 0.05);
  --shadow: 0 16px 44px rgba(31, 36, 48, 0.10);
  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", "PingFang SC",
    "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans CJK SC", sans-serif;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  font-family: var(--font);
  color: var(--text);
  background:
    radial-gradient(900px 460px at 88% -12%, rgba(245, 158, 11, 0.13), transparent 62%),
    radial-gradient(760px 420px at -8% 8%, rgba(59, 130, 246, 0.07), transparent 58%),
    var(--bg);
  background-attachment: fixed;
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
button { font-family: inherit; }
code {
  background: var(--orange-soft);
  border: 1px solid var(--orange-line);
  border-radius: 6px;
  padding: 1px 6px;
  color: var(--orange-strong);
  font-size: 0.9em;
  word-break: break-all;
}
.hidden { display: none !important; }

/* ---------- 背景装饰 ---------- */
.aurora { position: fixed; inset: 0; pointer-events: none; z-index: 0; overflow: hidden; }
.blob { position: absolute; border-radius: 50%; filter: blur(90px); opacity: 0.5; }
.blob-a { width: 420px; height: 420px; left: -140px; top: -140px;
  background: radial-gradient(circle, rgba(255, 179, 64, 0.45), transparent 70%); }
.blob-b { width: 360px; height: 360px; right: -120px; top: 8%;
  background: radial-gradient(circle, rgba(59, 130, 246, 0.18), transparent 70%); }
.blob-c { width: 320px; height: 320px; left: 42%; bottom: -160px;
  background: radial-gradient(circle, rgba(245, 158, 11, 0.16), transparent 70%); }

.glass {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

/* ---------- 登录 / 注册 ---------- */
.login-wrap {
  position: relative; z-index: 1; min-height: 100vh;
  display: grid; place-items: center; padding: 32px 20px;
}
.login-shell {
  width: min(1080px, 100%);
  display: grid; grid-template-columns: 1.05fr 0.95fr; gap: 26px; align-items: center;
}
.login-hero { padding: 18px 10px 18px 6px; }
.hero-badge {
  display: inline-block; font-size: 12px; font-weight: 600; color: var(--orange-strong);
  background: var(--orange-soft); border: 1px solid var(--orange-line);
  padding: 5px 12px; border-radius: 999px;
}
.login-hero h1 {
  margin: 18px 0 14px; font-size: clamp(28px, 3.6vw, 44px); line-height: 1.28;
  letter-spacing: -0.5px; font-weight: 800;
}
.login-hero .accent {
  background: var(--grad); -webkit-background-clip: text; background-clip: text;
  -webkit-text-fill-color: transparent;
}
.hero-sub { margin: 0 0 22px; color: var(--text-dim); font-size: 15px; line-height: 1.9; max-width: 30em; }
.hero-features { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: 1fr 1fr; gap: 12px; max-width: 460px; }
.hero-features li {
  display: flex; align-items: center; gap: 9px; font-size: 14px; color: var(--text-dim);
  background: var(--card); border: 1px solid var(--line); border-radius: 13px;
  padding: 11px 14px; box-shadow: var(--shadow-sm);
}
.hero-features .tick { color: var(--green); font-weight: 800; }

.login-card { width: 100%; max-width: 430px; justify-self: end; padding: 30px 30px 22px; }
.auth-brand { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.auth-brand strong { display: block; font-size: 17px; }
.auth-brand span { color: var(--text-faint); font-size: 12.5px; }
.brand-mark {
  width: 46px; height: 46px; display: grid; place-items: center; flex: none;
  color: #fff; border-radius: 14px; background: var(--grad);
  box-shadow: 0 10px 22px rgba(245, 158, 11, 0.32);
}
.brand-mark.small { width: 34px; height: 34px; border-radius: 10px; margin: 0; box-shadow: none; }
.brand-inline { display: flex; align-items: center; gap: 10px; }
.brand-name { font-weight: 800; font-size: 16px; letter-spacing: 0.2px; }
.brand h1 { margin: 0 0 6px; font-size: 26px; }

.auth-tabs {
  display: grid; grid-template-columns: 1fr 1fr; gap: 4px; padding: 4px;
  background: var(--bg); border: 1px solid var(--line); border-radius: 13px; margin-bottom: 20px;
}
.auth-tab {
  border: 0; background: transparent; cursor: pointer; padding: 9px 0; border-radius: 10px;
  font-size: 14px; font-weight: 600; color: var(--text-dim); transition: all .18s;
}
.auth-tab.active { background: var(--card); color: var(--orange-strong); box-shadow: var(--shadow-sm); }

.field { display: block; margin-bottom: 15px; }
.field > span { display: block; font-size: 12.5px; color: var(--text-dim); margin-bottom: 7px; font-weight: 600; }
.field input {
  width: 100%; padding: 12px 14px; font-size: 15px; color: var(--text);
  background: var(--card-soft); border: 1px solid var(--line-strong);
  border-radius: var(--radius-sm); outline: none; transition: border-color .18s, box-shadow .18s;
}
.field input:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.16); background: #fff; }
.field input::placeholder { color: var(--text-faint); }
.form-error { color: var(--red); font-size: 13px; margin: 10px 0 0; min-height: 18px; }
.login-hint { margin: 20px 0 0; color: var(--text-faint); font-size: 12px; line-height: 1.8; text-align: center; }

.oauth-area { margin-top: 20px; }
.oauth-divider { display: flex; align-items: center; gap: 12px; color: var(--text-faint); font-size: 12px; margin-bottom: 14px; }
.oauth-divider::before, .oauth-divider::after { content: ""; flex: 1; height: 1px; background: var(--line-strong); }
.oauth-buttons { display: grid; grid-template-columns: 1fr 1fr; gap: 10px; }

/* ---------- 按钮 ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 7px;
  border: 1px solid transparent; cursor: pointer; user-select: none;
  font-size: 13.5px; font-weight: 600; border-radius: var(--radius-sm);
  padding: 10px 15px; color: var(--text); transition: transform .12s, box-shadow .18s, background .18s, border-color .18s;
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.55; cursor: not-allowed; }
.btn-primary { background: var(--grad); color: #fff; box-shadow: 0 10px 22px rgba(245, 158, 11, 0.28); }
.btn-primary:hover:not(:disabled) { box-shadow: 0 12px 26px rgba(245, 158, 11, 0.4); }
.btn-ghost { background: var(--card); border-color: var(--line-strong); color: var(--text-dim); }
.btn-ghost:hover { border-color: var(--orange-line); color: var(--orange-strong); background: var(--orange-soft); }
.btn-oauth { background: var(--card); border-color: var(--line-strong); color: var(--text); }
.btn-oauth:hover:not(:disabled) { border-color: var(--orange-line); background: var(--orange-soft); }
.btn-block { width: 100%; margin-top: 6px; padding: 12px 16px; font-size: 15px; }
.btn-sm { padding: 6px 11px; font-size: 12.5px; }

.icon-btn {
  display: inline-grid; place-items: center; width: 34px; height: 34px;
  border: 1px solid transparent; border-radius: 10px; background: transparent;
  color: var(--text-dim); cursor: pointer; transition: all .16s;
}
.icon-btn:hover { background: var(--orange-soft); color: var(--orange-strong); }
.icon-btn.active { background: var(--orange-soft); color: var(--orange-strong); border-color: var(--orange-line); }

.spinner {
  width: 15px; height: 15px; border-radius: 50%;
  border: 2px solid rgba(255, 255, 255, 0.45); border-top-color: #fff;
  animation: spin .7s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---------- 应用外壳 ---------- */
.app { position: relative; z-index: 1; max-width: 1180px; margin: 0 auto; padding: 18px 22px 40px; }
.app-header {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding: 12px 18px; margin-bottom: 18px;
  background: var(--card); border: 1px solid var(--line); border-radius: var(--radius);
  box-shadow: var(--shadow-sm); position: sticky; top: 14px; z-index: 5;
}
.user-chip { display: flex; align-items: center; gap: 10px; }
.avatar {
  width: 34px; height: 34px; border-radius: 50%; display: grid; place-items: center;
  background: var(--grad); color: #fff; font-weight: 700; font-size: 14px;
}
#user-name { font-size: 14px; font-weight: 600; color: var(--text-dim); }

.file-panel { padding: 18px 20px 8px; }
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: 14px; flex-wrap: wrap; margin-bottom: 14px; }
.toolbar-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.crumbs { display: flex; align-items: center; gap: 6px; flex-wrap: wrap; font-size: 14px; min-width: 0; }
.crumb { background: transparent; border: 0; cursor: pointer; color: var(--text-dim); font-size: 14px; font-weight: 600; padding: 4px 6px; border-radius: 8px; }
.crumb:hover { color: var(--orange-strong); background: var(--orange-soft); }
.crumb.current { color: var(--text); }
.crumb-sep { color: var(--text-faint); }

.view-toggle { display: flex; gap: 2px; padding: 3px; background: var(--bg); border: 1px solid var(--line); border-radius: 11px; }

.drop-zone { min-height: 220px; border-radius: 14px; transition: background .18s; }
.drop-zone.dragging { background: var(--orange-soft); outline: 2px dashed var(--orange); outline-offset: -6px; }

/* 列表视图 */
.file-area.view-list .file-head,
.file-area.view-list .file-row {
  display: grid; grid-template-columns: minmax(0, 1fr) 110px 150px 150px;
  align-items: center; gap: 10px;
}
.file-head { padding: 8px 12px; color: var(--text-faint); font-size: 12px; font-weight: 600; border-bottom: 1px solid var(--line); }
.file-row {
  padding: 10px 12px; border-radius: 12px; cursor: pointer; transition: background .15s;
  border-bottom: 1px solid var(--line);
}
.file-row:hover { background: var(--card-soft); }
.file-row.is-dir { cursor: pointer; }
.col-main { display: flex; align-items: center; gap: 11px; min-width: 0; }
.file-name { font-size: 14px; font-weight: 600; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.col-size, .col-time { font-size: 12.5px; color: var(--text-dim); }
.col-dim { color: var(--text-dim); }
.col-empty { color: var(--text-faint); }
.row-actions { display: flex; justify-content: flex-end; gap: 2px; }

.file-ico {
  width: 34px; height: 34px; flex: none; display: grid; place-items: center;
  border-radius: 10px; background: var(--bg); color: var(--text-dim);
}
.file-ico.folder { background: var(--orange-soft); color: var(--orange-strong); }
.file-ico.video { background: #f3ecff; color: #7c5cf0; }
.file-ico.audio { background: #e9f7ff; color: #0ea5e9; }
.file-ico.image { background: var(--green-soft); color: #16a34a; }
.file-ico.archive { background: #fff1e6; color: #d97706; }
.file-ico.pdf { background: var(--red-soft); color: var(--red); }
.file-ico.text { background: var(--blue-soft); color: var(--blue); }

/* 宫格视图 */
.file-area.view-grid {
  display: grid; grid-template-columns: repeat(auto-fill, minmax(150px, 1fr)); gap: 12px;
  padding: 4px;
}
.file-area.view-grid .file-row {
  display: flex; flex-direction: column; align-items: flex-start; gap: 10px;
  padding: 16px; border: 1px solid var(--line); border-radius: 14px; background: var(--card);
  box-shadow: var(--shadow-sm); border-bottom: 1px solid var(--line);
}
.file-area.view-grid .file-row:hover { border-color: var(--orange-line); }
.file-area.view-grid .col-main { flex-direction: column; align-items: flex-start; gap: 10px; width: 100%; }
.file-area.view-grid .file-ico { width: 44px; height: 44px; }
.file-area.view-grid .file-name { white-space: normal; word-break: break-word; }
.file-area.view-grid .col-size { display: none; }
.file-area.view-grid .col-time { font-size: 11.5px; }
.file-area.view-grid .row-actions { width: 100%; justify-content: flex-start; }

.empty-state { display: grid; place-items: center; gap: 10px; padding: 60px 20px; color: var(--text-faint); text-align: center; }
.empty-state svg { color: var(--orange-line); }
.empty-state p { margin: 0; font-size: 15px; color: var(--text-dim); font-weight: 600; }
.empty-state span { font-size: 13px; }

.panel-foot { padding: 12px 4px 6px; color: var(--text-faint); font-size: 12px; }

/* ---------- 上传队列 ---------- */
.upload-panel {
  position: fixed; right: 22px; bottom: 22px; width: min(360px, calc(100vw - 32px));
  max-height: 60vh; display: flex; flex-direction: column; z-index: 20; padding: 12px 14px;
}
.upload-panel header { display: flex; align-items: center; justify-content: space-between; margin-bottom: 10px; font-weight: 700; font-size: 14px; }
.upload-panel header > div { display: flex; gap: 2px; }
.upload-list { overflow-y: auto; display: grid; gap: 10px; }
.upload-item { background: var(--card-soft); border: 1px solid var(--line); border-radius: 12px; padding: 10px 12px; }
.upload-item-head { display: flex; align-items: center; justify-content: space-between; gap: 8px; font-size: 12px; color: var(--text-dim); }
.upload-name { font-weight: 600; color: var(--text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.upload-status { font-weight: 600; }
.upload-status.done { color: var(--green); }
.upload-status.failed { color: var(--red); }
.upload-status.skipped { color: var(--text-faint); }
.progress { height: 6px; border-radius: 999px; background: var(--line); overflow: hidden; margin-top: 8px; }
.progress i { display: block; height: 100%; background: var(--grad); border-radius: 999px; transition: width .2s; }

/* ---------- 模态框 ---------- */
.modal { position: fixed; inset: 0; z-index: 40; display: grid; place-items: center; padding: 20px; }
.modal-backdrop { position: absolute; inset: 0; background: rgba(31, 36, 48, 0.34); backdrop-filter: blur(3px); }
.modal-card {
  position: relative; z-index: 1; background: var(--card); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow); max-height: 90vh;
  display: flex; flex-direction: column; overflow: hidden;
}
.modal-card > header { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 14px 18px; border-bottom: 1px solid var(--line); }
.modal-title { font-weight: 700; font-size: 15px; }
.modal-body { padding: 16px 18px; overflow: auto; }

.editor-card { width: min(1000px, 98vw); height: min(84vh, 820px); }
.editor-heading { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.editor-path { color: var(--text-faint); font-size: 11.5px; }
.editor-actions { display: flex; align-items: center; gap: 8px; flex-wrap: wrap; }
.editor-body { flex: 1; display: grid; grid-template-columns: 1fr; min-height: 0; }
.editor-body.split { grid-template-columns: 1fr 1fr; }
#editor-textarea {
  width: 100%; height: 100%; resize: none; border: 0; outline: 0; padding: 22px 26px;
  font: 14px/1.85 ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;
  color: var(--text); background: var(--card); min-height: 0;
}
.editor-preview { overflow: auto; min-height: 0; border-left: 1px solid var(--line); background: var(--card-soft); }
.editor-footer { display: flex; justify-content: space-between; gap: 12px; padding: 9px 18px; border-top: 1px solid var(--line); color: var(--text-faint); font-size: 11.5px; }
.editor-shortcuts { text-align: right; }

.preview-info { color: var(--text-faint); font-size: 12.5px; }

/* Markdown 预览 */
.md-doc { padding: 26px 30px; color: var(--text); font-size: 14.5px; line-height: 1.85; max-width: 920px; margin: 0 auto; }
.md-doc h1, .md-doc h2, .md-doc h3, .md-doc h4 { margin: 22px 0 10px; line-height: 1.4; }
.md-doc h1 { font-size: 27px; } .md-doc h2 { font-size: 21px; }
.md-doc h3 { font-size: 17px; } .md-doc h4 { font-size: 15px; }
.md-doc h1:first-child, .md-doc h2:first-child { margin-top: 4px; }
.md-doc p { margin: 9px 0; }
.md-doc ul, .md-doc ol { padding-left: 24px; margin: 8px 0; }
.md-doc li { margin: 4px 0; }
.md-doc a { color: var(--blue); }
.md-doc blockquote { margin: 12px 0; padding: 8px 14px; color: var(--text-dim); border-left: 3px solid var(--orange); background: var(--orange-soft); border-radius: 0 8px 8px 0; }
.md-doc pre.md-fence { margin: 12px 0; padding: 14px 16px; overflow: auto; background: #f4f6fb; border: 1px solid var(--line-strong); border-radius: 10px; font: 12.5px/1.7 ui-monospace, Menlo, Consolas, monospace; }
.md-doc pre.md-fence code { background: none; border: 0; padding: 0; color: var(--text); }
.md-doc img { max-width: 100%; border-radius: 10px; }
.md-doc hr { border: 0; border-top: 1px solid var(--line-strong); margin: 18px 0; }
.md-doc .md-empty { color: var(--text-faint); }

/* ---------- AI 助手 ---------- */
.ai-card { width: min(860px, 98vw); align-self: start; margin: 6vh auto auto; max-height: 86vh; }
.ai-card > header { flex: none; }
.ai-model-chip { font-size: 11px; color: var(--orange-strong); background: var(--orange-soft); border: 1px solid var(--orange-line); padding: 3px 10px; border-radius: 20px; width: max-content; }
.ai-main { padding: 16px 18px 18px; overflow-y: auto; }
.ai-context { display: flex; align-items: center; gap: 9px; flex-wrap: wrap; margin-bottom: 10px; padding: 9px 12px; background: var(--orange-soft); border: 1px solid var(--orange-line); border-radius: 11px; color: var(--text-dim); font-size: 12.5px; }
.ai-context svg { color: var(--orange-strong); flex: none; }
.ai-check { display: inline-flex; align-items: center; gap: 6px; cursor: pointer; margin-left: auto; color: var(--text-dim); }
.ai-check input { accent-color: var(--orange); }
.ai-main textarea {
  width: 100%; resize: vertical; min-height: 88px; max-height: 220px;
  padding: 13px 15px; font: inherit; font-size: 14px; color: var(--text);
  background: var(--card-soft); border: 1px solid var(--line-strong); border-radius: 12px;
  outline: 0; line-height: 1.7;
}
.ai-main textarea:focus { border-color: var(--orange); box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.14); background: #fff; }
.ai-presets { display: flex; flex-wrap: wrap; gap: 8px; margin: 12px 0 6px; }
.chip { border: 1px solid var(--line-strong); background: var(--card); color: var(--text-dim); font-size: 12px; border-radius: 20px; padding: 6px 13px; cursor: pointer; transition: all .16s; }
.chip:hover { border-color: var(--orange-line); background: var(--orange-soft); color: var(--orange-strong); }
.ai-actions { display: flex; justify-content: space-between; align-items: center; gap: 12px; margin: 12px 0 4px; }
.ai-status { color: var(--text-faint); font-size: 12px; min-width: 0; }
.ai-result { margin-top: 14px; border: 1px solid var(--line); border-radius: 12px; background: var(--card-soft); overflow: hidden; }
.ai-result-head { display: flex; justify-content: space-between; align-items: center; gap: 10px; padding: 9px 12px; border-bottom: 1px solid var(--line); color: var(--text-dim); font-size: 12px; }
.ai-result-head > div { display: flex; gap: 7px; flex-wrap: wrap; }
.ai-output { margin: 0; padding: 14px 16px; max-height: 34vh; overflow: auto; white-space: pre-wrap; word-break: break-word; font: 12.5px/1.8 ui-monospace, Menlo, Consolas, monospace; color: var(--text); }
.ai-thinking { display: flex; align-items: center; gap: 5px; padding: 8px 14px; border-top: 1px solid var(--line); color: var(--text-faint); font-size: 12px; }
.thinking-dot { width: 6px; height: 6px; border-radius: 50%; background: var(--orange); animation: blink 1.2s infinite ease-in-out; }
.thinking-dot:nth-child(2) { animation-delay: .18s; }
.thinking-dot:nth-child(3) { animation-delay: .36s; }
@keyframes blink { 0%, 80%, 100% { opacity: .25; } 40% { opacity: 1; } }

/* ---------- AI 设置 ---------- */
.config-card { width: min(560px, 100%); }
.config-body { padding: 18px 22px 8px; overflow-y: auto; }
.config-footer { display: flex; justify-content: space-between; align-items: center; gap: 12px; padding: 10px 22px 16px; color: var(--text-faint); font-size: 12px; }
.config-note { color: var(--text-faint); font-size: 12px; line-height: 1.8; margin: 4px 0 6px; }

/* ---------- Toast ---------- */
.toasts { position: fixed; top: 18px; left: 50%; transform: translateX(-50%); z-index: 80; display: grid; gap: 8px; }
.toast {
  background: var(--card); border: 1px solid var(--line-strong); color: var(--text);
  padding: 10px 16px; border-radius: 12px; font-size: 13.5px; font-weight: 600;
  box-shadow: var(--shadow); opacity: 1;
}
.toast.ok { border-color: #bfe9cd; color: #15803d; background: var(--green-soft); }
.toast.error { border-color: #f5c2c2; color: #b91c1c; background: var(--red-soft); }

@media (max-width: 900px) {
  .login-shell { grid-template-columns: 1fr; }
  .login-hero { text-align: center; padding: 8px; }
  .hero-features { margin: 0 auto; }
  .login-card { justify-self: center; }
}
@media (max-width: 760px) {
  .app { padding: 12px 12px 32px; }
  .app-header { position: static; }
  .file-area.view-list .file-head { display: none; }
  .file-area.view-list .file-row { grid-template-columns: minmax(0, 1fr) auto; row-gap: 6px; }
  .file-area.view-list .col-size, .file-area.view-list .col-time { display: none; }
  .editor-card, .ai-card { width: 100vw; height: 100vh; max-height: 100vh; margin: 0; border-radius: 0; }
  .editor-body.split { grid-template-columns: 1fr; }
  .editor-body.split .editor-preview { display: none; }
  .oauth-buttons { grid-template-columns: 1fr; }
  .hero-features { grid-template-columns: 1fr; }
}