:root {
  --bg: #0c0d10;
  --elev: #14151a;
  --subtle: #1b1c22;
  --fg: #e8e6e3;
  --muted: #8b909a;
  --dim: #6a6f78;
  --border: #2a2c33;
  --strong: #3a3d46;
  --accent: #c5c9d1;
  --accent-fg: #0c0d10;
  --danger: #c45c4a;
  --danger-fg: #fff6f4;
  --success: #7aa384;
  --ring: #c5c9d1;
  --sans: "Noto Sans SC", "IBM Plex Sans", system-ui, sans-serif;
  --display: "Instrument Serif", "Noto Serif SC", serif;
  --radius: 12px;
}
* { box-sizing: border-box; border-color: var(--border); }
html, body { margin: 0; min-height: 100%; background: var(--bg); color: var(--fg); font-family: var(--sans); -webkit-font-smoothing: antialiased; }
button:not(:disabled), [role="button"]:not(:disabled) { cursor: pointer; }
::selection { background: color-mix(in srgb, var(--accent) 30%, transparent); }
#app { min-height: 100dvh; }
h1, h2 { font-family: var(--display); font-weight: 500; letter-spacing: -0.02em; }
a { color: inherit; }
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  height: 40px; padding: 0 14px; border-radius: 8px; border: 1px solid transparent;
  font: 500 13px/1 var(--sans); color: var(--accent-fg); background: var(--accent);
}
label.btn { cursor: pointer; }
.btn:disabled { opacity: .45; cursor: not-allowed; }
.btn-ghost { background: transparent; color: var(--fg); border-color: transparent; }
.btn-ghost:hover { background: var(--subtle); }
.btn-outline { background: transparent; color: var(--fg); border-color: var(--border); }
.btn-danger { background: var(--danger); color: var(--danger-fg); }
.btn-sm { height: 32px; padding: 0 10px; font-size: 12px; }
.input, .select {
  width: 100%; height: 44px; padding: 0 12px; border-radius: 8px;
  border: 1px solid var(--border); background: var(--subtle); color: var(--fg); font: 14px var(--sans);
  outline: none;
}
.input:focus, .select:focus { border-color: var(--strong); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ring) 25%, transparent); }
.label { display: block; font-size: 13px; font-weight: 500; margin-bottom: 6px; }
.center { min-height: 100dvh; display: grid; place-items: center; padding: 24px; text-align: center; }
.muted { color: var(--muted); font-size: 14px; }
.danger { color: var(--danger); font-size: 13px; }
.badge {
  display: inline-flex; align-items: center; height: 20px; padding: 0 7px;
  border-radius: 999px; font-size: 11px; background: var(--subtle); color: var(--muted); border: 1px solid var(--border);
}
.badge-accent { background: var(--accent); color: var(--accent-fg); border-color: transparent; }
.login { min-height: 100dvh; display: grid; }
@media (min-width: 960px) { .login { grid-template-columns: 1fr 1fr; } }
.login-hero {
  display: none; flex-direction: column; justify-content: space-between;
  padding: 48px; border-right: 1px solid var(--border);
}
@media (min-width: 960px) { .login-hero { display: flex; } }
.login-hero h1 { font-size: 48px; line-height: 1.1; margin: 0; }
.login-panel { display: flex; align-items: center; justify-content: center; padding: 40px 20px; }
.login-card { width: 100%; max-width: 360px; }
.brand { display: flex; align-items: center; gap: 12px; }
.brand svg { width: 40px; height: 40px; }
.brand-en { font-size: 11px; letter-spacing: .18em; text-transform: uppercase; color: var(--dim); }
.dots { margin: 40px 0 0; padding: 0; list-style: none; color: var(--muted); font-size: 14px; }
.dots li { display: flex; gap: 12px; margin: 10px 0; }
.dots i { width: 6px; height: 6px; border-radius: 99px; background: var(--accent); margin-top: 8px; flex: none; }
.form { display: grid; gap: 12px; margin-top: 24px; }
.shell { min-height: 100dvh; display: flex; max-width: 1280px; margin: 0 auto; }
.aside {
  display: none; width: 240px; flex: none; border-right: 1px solid var(--border);
  padding: 24px 16px; flex-direction: column;
}
@media (min-width: 800px) { .aside { display: flex; } }
.nav { display: flex; flex-direction: column; gap: 4px; margin-top: 32px; flex: 1; }
.nav-btn {
  display: flex; align-items: center; gap: 10px; height: 40px; padding: 0 12px;
  border: 0; border-radius: 8px; background: transparent; color: var(--muted); font: 500 13px var(--sans); text-align: left;
}
.nav-btn.active, .nav-btn:hover { background: var(--subtle); color: var(--fg); }
.quota { border: 1px solid var(--border); background: var(--elev); border-radius: 10px; padding: 12px; font-size: 12px; color: var(--muted); }
.bar { height: 4px; background: var(--subtle); border-radius: 99px; overflow: hidden; margin-top: 8px; }
.bar > i { display: block; height: 100%; background: var(--accent); }
.main { flex: 1; min-width: 0; display: flex; flex-direction: column; }
.topbar { display: flex; align-items: center; justify-content: space-between; gap: 12px; padding: 12px 16px; border-bottom: 1px solid var(--border); }
@media (min-width: 800px) { .topbar { display: none; } }
.tabs { display: flex; gap: 4px; padding: 8px 12px; border-bottom: 1px solid var(--border); }
@media (min-width: 800px) { .tabs { display: none; } }
.page { padding: 28px 20px 48px; }
.page h1 { font-size: 32px; margin: 0; }
.toolbar { display: flex; flex-wrap: wrap; gap: 10px; margin: 20px 0; }
.search { flex: 1; min-width: 180px; height: 40px; }
.empty { border: 1px dashed var(--border); background: var(--elev); border-radius: 16px; padding: 64px 24px; text-align: center; }
.list { border: 1px solid var(--border); background: var(--elev); border-radius: 16px; overflow: hidden; }
.row {
  display: flex; align-items: center; gap: 12px; padding: 14px 16px;
  border-top: 1px solid var(--border); width: 100%; background: transparent; color: inherit; text-align: left;
}
.row:first-child { border-top: 0; }
.row:hover { background: var(--subtle); }
.row-main { flex: 1; min-width: 0; }
.row-main strong { display: block; font-size: 14px; font-weight: 500; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.row-main span { font-size: 12px; color: var(--muted); }
.actions { display: flex; flex-wrap: wrap; gap: 6px; }
.dialog-bg {
  position: fixed; inset: 0; background: color-mix(in srgb, var(--bg) 80%, transparent);
  display: grid; place-items: center; padding: 16px; z-index: 50;
}
.dialog {
  width: min(720px, 100%); background: var(--elev); border: 1px solid var(--border);
  border-radius: 16px; padding: 20px; box-shadow: 0 24px 48px -28px rgb(0 0 0 / .55);
}
.dialog.sm { width: min(440px, 100%); }
.dialog h2 { margin: 0 0 8px; font-size: 22px; }
.preview-frame { max-height: 70vh; overflow: auto; background: var(--bg); border-radius: 10px; }
.preview-frame img, .preview-frame video { max-width: 100%; max-height: 70vh; display: block; margin: 0 auto; }
.preview-frame iframe { width: 100%; height: 70vh; border: 0; background: #fff; }
.preview-text {
  margin: 0; padding: 16px; font: 13px/1.6 ui-monospace, Menlo, Consolas, monospace;
  white-space: pre-wrap; word-break: break-word; color: var(--fg);
}
.toast {
  position: fixed; right: 16px; bottom: 16px; z-index: 60; display: grid; gap: 8px;
}
.toast i {
  display: block; background: var(--elev); border: 1px solid var(--border); color: var(--fg);
  padding: 10px 14px; border-radius: 10px; font-size: 13px; font-style: normal;
}
.secret {
  font-family: ui-monospace, Menlo, monospace; letter-spacing: .12em;
  background: var(--subtle); border: 1px solid var(--border); border-radius: 8px; padding: 10px 12px;
}
.flex { display: flex; gap: 8px; align-items: center; }
.grow { flex: 1; }
.mt { margin-top: 16px; }
.right { display: flex; justify-content: flex-end; gap: 8px; margin-top: 16px; }
.hidden { display: none !important; }
.sr-file {
  position: fixed; left: 0; top: 0; width: 1px; height: 1px; opacity: 0; overflow: hidden;
}
.progress-banner {
  position: fixed; left: 50%; bottom: 20px; transform: translateX(-50%);
  background: var(--elev); border: 1px solid var(--border); color: var(--fg);
  padding: 10px 16px; border-radius: 10px; z-index: 70; font-size: 13px;
  box-shadow: 0 16px 40px -24px rgb(0 0 0 / .7);
}
.folder-head {
  display: flex; align-items: center; gap: 8px; padding: 10px 16px;
  background: var(--subtle); color: var(--muted); font-size: 13px;
  border-top: 1px solid var(--border);
}
.folder-head:first-child { border-top: 0; }
.folder-head strong { color: var(--fg); font-weight: 500; }
.row.nested { padding-left: 28px; }
.crumbs { display: flex; flex-wrap: wrap; align-items: center; gap: 4px; margin-top: 12px; font-size: 13px; }
.crumb { border: 0; background: transparent; color: var(--muted); padding: 4px 6px; border-radius: 6px; font: 500 13px var(--sans); }
.crumb:hover { background: var(--subtle); color: var(--fg); }
.crumb-sep { color: var(--dim); }
.icon-folder {
  width: 28px; height: 22px; flex: none; border-radius: 3px 3px 2px 2px;
  background: linear-gradient(#d5c394, #c4b07a);
  position: relative; margin-right: 4px;
}
.icon-folder:before {
  content: ""; position: absolute; left: 0; top: -6px; width: 12px; height: 8px;
  background: #d5c394; border-radius: 3px 3px 0 0;
}
.folder-row strong { font-weight: 600; }
.page.dropping { outline: 2px dashed var(--accent); outline-offset: -8px; background: color-mix(in srgb, var(--accent) 6%, transparent); }
#os-drop-mask {
  display: none; position: fixed; inset: 12px; z-index: 80; place-items: center;
  border: 2px dashed var(--accent); border-radius: 16px;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  color: var(--fg); text-align: center; pointer-events: none;
}
#os-drop-mask.show { display: grid; }
#os-drop-mask strong { display: block; font-size: 22px; font-family: var(--display); font-weight: 500; }
#os-drop-mask p { color: var(--muted); margin: 8px 0 0; }
.upload-panel {
  margin: 16px 0 8px; padding: 16px; border: 1px solid var(--border);
  background: var(--elev); border-radius: 12px;
}
.upload-fields {
  display: grid; gap: 12px;
}
@media (min-width: 800px) {
  .upload-fields { grid-template-columns: 1fr 1fr auto; align-items: end; }
}
.upload-fields .btn { height: 44px; }
input[type="file"].input { padding: 8px; height: auto; }
.row.is-disabled { opacity: .55; }