:root {
  --bg: #fafafa;
  --surface: #ffffff;
  --border: #e4e4e7;
  --text: #18181b;
  --muted: #71717a;
  --accent: #2563eb;
  --accent-hover: #1d4ed8;
  --error: #dc2626;
  --radius: 10px;
}

* { box-sizing: border-box; }

body {
  margin: 0;
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
}

.hidden { display: none !important; }

/* ---------- Login ---------- */

#login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

/* ---------- Server picker / Admin (share the topbar + wide-card layout) ---------- */

#servers-screen,
#admin-screen {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

#servers-screen .card.wide,
#admin-screen .card.wide {
  max-width: none;
  margin: 0 0 20px;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 999px;
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-left: 8px;
  background: var(--border);
  color: var(--muted);
}

.badge-admin { background: #fef3c7; color: #92400e; }
.badge-user { background: #dbeafe; color: #1e40af; }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  width: 100%;
  max-width: 340px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.card.wide { max-width: 440px; }

.back-link {
  align-self: flex-start;
  padding: 0;
  margin-bottom: -4px;
}

.server-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 360px;
  overflow-y: auto;
}

.server-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
  background: var(--bg);
}

.server-item:hover,
.server-item:focus-visible {
  border-color: var(--accent);
  outline: none;
}

.server-name {
  font-size: 14px;
  font-weight: 500;
  color: var(--text);
}

.server-host {
  font-size: 12px;
  margin-top: 2px;
}

.server-arrow {
  color: var(--muted);
}

.server-item:hover .server-arrow { color: var(--accent); }

.hint {
  margin: 0;
  font-size: 12px;
  color: var(--muted);
}

.card h1 {
  margin: 0;
  font-size: 20px;
  font-weight: 600;
}

.card h2 {
  margin: 0 0 4px;
  font-size: 15px;
  font-weight: 600;
}

.subtitle {
  margin: 0 0 8px 0;
  color: var(--muted);
  font-size: 14px;
}

label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 13px;
  color: var(--muted);
}

input {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

input:focus {
  outline: none;
  border-color: var(--accent);
}

button {
  cursor: pointer;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 500;
}

.card button[type="submit"] {
  margin-top: 6px;
  padding: 10px;
  background: var(--accent);
  color: white;
}

.card button[type="submit"]:hover {
  background: var(--accent-hover);
}

.error {
  margin: 0;
  color: var(--error);
  font-size: 13px;
  min-height: 16px;
}

/* ---------- Browse screen ---------- */

#browse-screen {
  max-width: 760px;
  margin: 0 auto;
  padding: 24px 20px 60px;
}

.topbar {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--border);
  margin-bottom: 16px;
}

.topbar strong {
  font-size: 16px;
  margin-right: 8px;
}

.muted { color: var(--muted); font-size: 13px; }

.link-btn {
  background: none;
  color: var(--muted);
  font-size: 13px;
  padding: 4px 0;
}

.link-btn:hover { color: var(--text); }

.breadcrumb {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 14px;
  display: flex;
  gap: 4px;
  flex-wrap: wrap;
}

.breadcrumb span {
  cursor: pointer;
}

.breadcrumb span:hover { color: var(--accent); text-decoration: underline; }

.breadcrumb .sep { cursor: default; color: var(--border); }

.file-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.file-table thead th {
  text-align: left;
  font-size: 12px;
  font-weight: 500;
  color: var(--muted);
  padding: 10px 14px;
  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

.file-table tbody tr {
  border-bottom: 1px solid var(--border);
}

.file-table tbody tr:last-child { border-bottom: none; }

.file-table tbody tr:hover { background: var(--bg); }

.file-table td {
  padding: 10px 14px;
  font-size: 14px;
  vertical-align: middle;
}

.name-cell {
  display: flex;
  align-items: center;
  gap: 8px;
  cursor: default;
}

.name-cell.dir { cursor: pointer; color: var(--text); }
.name-cell.dir:hover { color: var(--accent); }

.icon { font-size: 15px; width: 18px; text-align: center; }

.download-link {
  color: var(--accent);
  text-decoration: none;
  font-size: 13px;
  padding: 4px 8px;
  border-radius: 6px;
}

.download-link:hover { background: #eff6ff; }

#empty-state {
  text-align: center;
  padding: 30px 0;
}

/* ---------- Admin: manage users ---------- */

.admin-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .grow { flex: 1 1 auto; }
.form-row .shrink { flex: 0 0 90px; }

textarea {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 13px;
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  color: var(--text);
  background: var(--bg);
  resize: vertical;
}

textarea:focus {
  outline: none;
  border-color: var(--accent);
}

.admin-form select {
  padding: 9px 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  font-size: 14px;
  color: var(--text);
  background: var(--bg);
}

fieldset {
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  margin: 0;
}

fieldset legend {
  font-size: 12px;
  color: var(--muted);
  padding: 0 4px;
}

.checkbox-list {
  display: flex;
  flex-direction: column;
  gap: 6px;
  max-height: 180px;
  overflow-y: auto;
}

.checkbox-item {
  display: flex;
  flex-direction: row;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  color: var(--text);
}

.checkbox-item input { width: auto; padding: 0; }

.server-grant-row {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 4px 0;
}

.server-grant-row + .server-grant-row {
  border-top: 1px solid var(--border);
  margin-top: 2px;
  padding-top: 8px;
}

.server-grant-detail {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding-left: 22px;
}

.path-chip-list {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.path-chip {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 2px 4px 2px 10px;
  font-size: 12px;
  color: var(--text);
}

.path-chip-remove {
  background: none;
  color: var(--muted);
  border-radius: 999px;
  width: 18px;
  height: 18px;
  line-height: 1;
  font-size: 13px;
  padding: 0;
}

.path-chip-remove:hover { color: var(--error); }

.path-adder {
  display: flex;
  gap: 6px;
}

.path-add-input {
  flex: 1 1 auto;
  padding: 6px 8px;
  font-size: 12px;
  min-width: 0;
}

.path-adder .link-btn {
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 4px 10px;
  flex: 0 0 auto;
}

#users-table .link-btn {
  margin-right: 10px;
  padding: 4px 6px;
}

.link-btn.danger { color: var(--error); }
.link-btn.danger:hover { color: #991b1b; }
.link-btn:disabled { color: var(--border); cursor: not-allowed; }

.modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  z-index: 10;
}

.modal {
  max-width: 380px;
}

.modal h2 {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.modal-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 4px;
}