:root {
  color-scheme: light;
  --bg: #f4f6f8;
  --panel: #ffffff;
  --ink: #17212b;
  --muted: #667483;
  --line: #d9e0e7;
  --accent: #166b8f;
  --accent-dark: #0f536f;
  --folder: #8a5a12;
  --file: #32615f;
  --danger: #b42318;
  --soft: #e8f3f7;
  font-family: Inter, "Segoe UI", "Microsoft YaHei", Arial, sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
}

button,
input,
select {
  font: inherit;
}

button {
  border: 0;
  cursor: pointer;
}

button:disabled {
  cursor: not-allowed;
  opacity: 0.45;
}

.hidden {
  display: none !important;
}

.app-shell {
  min-height: 100vh;
}

.host-view,
.auth-view {
  min-height: 100vh;
  padding: 28px 18px;
  display: grid;
  place-items: center;
}

.host-panel,
.auth-panel {
  width: min(430px, 100%);
  padding: 24px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--panel);
}

.host-panel {
  width: min(560px, 100%);
}

.eyebrow {
  margin: 0 0 4px;
  color: var(--accent);
  font-size: 12px;
  font-weight: 800;
  letter-spacing: 0;
  text-transform: uppercase;
}

h1,
p {
  margin-top: 0;
}

h1 {
  margin-bottom: 8px;
  font-size: 30px;
  line-height: 1.08;
}

.auth-note,
.host-line {
  margin-bottom: 0;
  color: var(--muted);
  font-size: 14px;
  line-height: 1.5;
}

.login-form {
  margin-top: 22px;
  display: grid;
  gap: 12px;
}

.download-panel {
  margin-top: 18px;
  padding: 12px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #f8fafb;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.download-panel span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.download-panel a {
  min-height: 36px;
  padding: 0 12px;
  border-radius: 7px;
  background: var(--soft);
  color: var(--accent-dark);
  display: inline-flex;
  align-items: center;
  text-decoration: none;
  font-size: 13px;
  font-weight: 800;
}

label {
  display: grid;
  gap: 7px;
}

label span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

input,
select {
  width: 100%;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: 7px;
  background: #fff;
  color: var(--ink);
  outline: none;
  padding: 0 12px;
}

input:focus,
select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(22, 107, 143, 0.14);
}

.primary-btn,
.icon-btn,
.soft-btn,
.row-action {
  min-height: 44px;
  border-radius: 7px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.primary-btn {
  gap: 8px;
  color: #fff;
  background: var(--accent);
  font-weight: 800;
}

.primary-btn:hover {
  background: var(--accent-dark);
}

.btn-symbol {
  font-size: 18px;
}

.auth-error {
  min-height: 20px;
  margin: 12px 0 0;
  color: var(--danger);
  font-size: 14px;
}

.pin-card {
  margin-top: 22px;
  padding: 18px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--soft);
  display: grid;
  gap: 8px;
}

.pin-card span,
.host-info span {
  color: var(--muted);
  font-size: 13px;
  font-weight: 800;
}

.pin-card strong {
  color: var(--accent-dark);
  font-size: 44px;
  line-height: 1;
  letter-spacing: 6px;
}

.host-info {
  margin-top: 18px;
  display: grid;
  gap: 8px;
}

.url-list {
  display: grid;
  gap: 8px;
}

.url-list a,
.url-list p {
  margin: 0;
  padding: 11px 12px;
  border-radius: 7px;
  background: #edf1f4;
  color: var(--ink);
  font-size: 14px;
  font-weight: 800;
  overflow-wrap: anywhere;
  text-decoration: none;
}

.host-warning {
  margin: 16px 0 0;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.5;
}

.main-view {
  min-height: 100vh;
  padding: 14px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.topbar,
.control-strip,
.pathbar,
.file-list {
  border: 1px solid var(--line);
  background: var(--panel);
  border-radius: 8px;
}

.topbar {
  min-height: 88px;
  padding: 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.brand-block {
  min-width: 0;
}

.icon-btn {
  width: 44px;
  flex: 0 0 auto;
  background: #e9eef2;
  color: var(--ink);
  font-size: 22px;
  font-weight: 800;
}

.control-strip {
  padding: 12px;
  display: grid;
  grid-template-columns: minmax(112px, 0.8fr) minmax(0, 1.4fr) 44px;
  gap: 10px;
  align-items: end;
}

.pathbar {
  min-height: 52px;
  padding: 8px;
  display: grid;
  grid-template-columns: 72px minmax(0, 1fr);
  gap: 8px;
  align-items: center;
}

.soft-btn {
  background: var(--soft);
  color: var(--accent-dark);
  font-weight: 800;
}

.crumbs {
  min-width: 0;
  display: flex;
  gap: 6px;
  overflow-x: auto;
  scrollbar-width: thin;
}

.crumbs button {
  min-height: 36px;
  max-width: 180px;
  padding: 0 10px;
  border-radius: 7px;
  flex: 0 0 auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  background: #edf1f4;
  color: var(--ink);
  font-weight: 700;
}

.summary-row {
  min-height: 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

#statusText[data-tone="active"] {
  color: var(--accent-dark);
}

#statusText[data-tone="error"] {
  color: var(--danger);
}

.file-list {
  flex: 1;
  min-height: 240px;
  overflow: hidden;
}

.file-item {
  min-height: 68px;
  padding: 10px;
  border-bottom: 1px solid var(--line);
  display: grid;
  grid-template-columns: 46px minmax(0, 1fr) 44px;
  gap: 10px;
  align-items: center;
}

.file-item:last-child {
  border-bottom: 0;
}

.file-badge {
  width: 46px;
  height: 46px;
  border-radius: 7px;
  color: #fff;
  font-weight: 900;
}

.file-badge.folder {
  background: var(--folder);
}

.file-badge.file {
  background: var(--file);
}

.file-meta {
  min-width: 0;
  padding: 0;
  display: grid;
  gap: 4px;
  text-align: left;
  background: transparent;
}

.file-name {
  min-width: 0;
  overflow-wrap: anywhere;
  color: var(--ink);
  font-size: 15px;
  font-weight: 800;
  line-height: 1.25;
}

.file-sub {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.2;
}

.row-action {
  width: 44px;
  background: #edf1f4;
  color: var(--accent-dark);
  font-size: 22px;
  font-weight: 900;
}

.empty-state {
  padding: 36px 18px;
  color: var(--muted);
  text-align: center;
  font-weight: 700;
}

@media (min-width: 860px) {
  .main-view {
    width: min(980px, 100%);
    margin: 0 auto;
    padding: 24px;
  }

  .control-strip {
    grid-template-columns: 220px minmax(0, 1fr) 44px;
  }

  .file-list {
    max-height: calc(100vh - 270px);
    overflow-y: auto;
  }
}

@media (max-width: 520px) {
  .main-view {
    padding: 10px;
    gap: 10px;
  }

  .topbar {
    padding: 14px;
  }

  h1 {
    font-size: 24px;
  }

  .control-strip {
    grid-template-columns: minmax(0, 1fr) 44px;
  }

  .root-field {
    grid-column: 1 / -1;
  }

  .search-field {
    grid-column: 1;
  }

  .file-list {
    border-radius: 8px;
  }
}