:root {
  --bg: #0e1116;
  --panel: #161b22;
  --panel2: #1c2230;
  --line: #2a3140;
  --text: #d7dde8;
  --muted: #8b95a7;
  --accent: #4c8dff;
  --accent2: #2f6fe0;
  --danger: #e05561;
  --ok: #3fb950;
  --dir: #e3b341;
}

* { box-sizing: border-box; }

html, body {
  margin: 0;
  height: 100%;
  background: var(--bg);
  color: var(--text);
  font: 14px/1.45 "Segoe UI", system-ui, -apple-system, sans-serif;
}

.hidden { display: none !important; }
.muted { color: var(--muted); }
.pad { padding: 14px; }

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 52px;
  padding: 0 16px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
}
.brand { font-weight: 600; letter-spacing: .2px; }
.dot {
  display: inline-block;
  width: 9px; height: 9px;
  border-radius: 50%;
  background: var(--ok);
  margin-right: 8px;
  box-shadow: 0 0 8px var(--ok);
}
.topbar-right { display: flex; align-items: center; gap: 10px; }
.pill {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 999px;
  padding: 4px 12px;
  font-size: 12px;
  color: var(--muted);
}

/* ---------- buttons ---------- */
.btn {
  background: var(--panel2);
  color: var(--text);
  border: 1px solid var(--line);
  border-radius: 6px;
  padding: 7px 12px;
  font-size: 13px;
  cursor: pointer;
}
.btn:hover { background: #232b3b; border-color: #3a4457; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent2); }
.btn-sm { padding: 4px 9px; font-size: 12px; }
.btn-danger { color: var(--danger); border-color: #4a2b31; }
.btn-danger:hover { background: #2a1a1e; }

/* ---------- layout ---------- */
.layout { display: flex; height: calc(100% - 52px); }

.sidebar {
  width: 290px;
  min-width: 290px;
  background: var(--panel);
  border-right: 1px solid var(--line);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.sidebar-title {
  padding: 12px 14px;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .8px;
  color: var(--muted);
  border-bottom: 1px solid var(--line);
}
.session-list { overflow-y: auto; flex: 1; }

.session {
  padding: 11px 14px;
  border-bottom: 1px solid #1e2430;
  cursor: pointer;
}
.session:hover { background: #1a2130; }
.session.active { background: #1d2a44; border-left: 3px solid var(--accent); padding-left: 11px; }
.session .s-host { font-weight: 600; }
.session .s-meta { font-size: 12px; color: var(--muted); margin-top: 3px; }
.session .tag {
  font-size: 10px;
  text-transform: uppercase;
  border-radius: 4px;
  padding: 1px 5px;
  margin-left: 6px;
  border: 1px solid var(--line);
  color: var(--muted);
}
.session .tag.legacy { color: var(--dir); border-color: #4a3f1c; }
.session .tag.new { color: var(--ok); border-color: #1f4626; }

/* ---------- content ---------- */
.content { flex: 1; overflow-y: auto; display: flex; flex-direction: column; }
.empty { margin: auto; text-align: center; color: var(--muted); }
.empty h2 { color: var(--text); font-weight: 600; }

.device-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 18px 12px;
  gap: 12px;
}
.dev-host { font-size: 18px; font-weight: 600; }
.dev-meta { font-size: 12px; color: var(--muted); margin-top: 3px; }
.device-actions { display: flex; gap: 8px; }

.pathbar { display: flex; gap: 8px; padding: 0 18px; }
.path-input {
  flex: 1;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 8px 10px;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
}
.path-input:focus { outline: none; border-color: var(--accent); }

.crumbs {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  padding: 10px 18px;
  font-size: 13px;
}
.crumb { color: var(--accent); cursor: pointer; padding: 2px 6px; border-radius: 4px; }
.crumb:hover { background: #1d2a44; }
.crumb-sep { color: var(--muted); }

.table-wrap { padding: 0 18px 18px; }
table.files { width: 100%; border-collapse: collapse; }
table.files th {
  text-align: left;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .6px;
  color: var(--muted);
  padding: 8px 10px;
  border-bottom: 1px solid var(--line);
}
table.files td {
  padding: 8px 10px;
  border-bottom: 1px solid #1c2230;
  font-size: 13px;
}
table.files tr:hover td { background: #171d28; }
.col-size, .col-time { width: 170px; }
.col-act { width: 170px; }

.row-name { display: flex; align-items: center; gap: 9px; cursor: pointer; }
.badge {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 4px;
  border: 1px solid var(--line);
  color: var(--muted);
  min-width: 38px;
  text-align: center;
}
.badge.dir { color: var(--dir); border-color: #4a3f1c; }
.nm { font-family: Consolas, "Courier New", monospace; }

/* ---------- shell ---------- */
.shell {
  margin: 0 18px 18px;
  background: #0b0e13;
  border: 1px solid var(--line);
  border-radius: 8px;
  overflow: hidden;
}
.shell-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 7px 12px;
  background: var(--panel);
  border-bottom: 1px solid var(--line);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .7px;
  color: var(--muted);
}
.shell-out {
  margin: 0;
  padding: 12px;
  max-height: 260px;
  overflow-y: auto;
  font-family: Consolas, "Courier New", monospace;
  font-size: 13px;
  white-space: pre-wrap;
  word-break: break-word;
  color: #b9c4d6;
}
.shell-input {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 9px 12px;
  border-top: 1px solid var(--line);
}
.shell-input .prompt { color: var(--ok); font-family: Consolas, monospace; }
.shell-input input {
  flex: 1;
  background: transparent;
  border: none;
  color: var(--text);
  font-family: Consolas, monospace;
  font-size: 13px;
}
.shell-input input:focus { outline: none; }

/* ---------- toast ---------- */
#toast {
  position: fixed;
  bottom: 20px;
  right: 20px;
  background: var(--panel2);
  border: 1px solid var(--line);
  border-left: 3px solid var(--accent);
  border-radius: 6px;
  padding: 11px 14px;
  max-width: 420px;
  font-size: 13px;
  box-shadow: 0 8px 24px rgba(0,0,0,.45);
  z-index: 99;
}
#toast.err { border-left-color: var(--danger); }
#toast.ok { border-left-color: var(--ok); }

/* ---------- login ---------- */
.login-overlay {
  position: fixed;
  inset: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(6, 9, 14, .93);
}
.login-card {
  width: min(340px, 92vw);
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 12px;
  padding: 26px 24px;
  display: flex;
  flex-direction: column;
  gap: 12px;
  box-shadow: 0 18px 50px rgba(0, 0, 0, .55);
}
.login-brand { font-size: 16px; }
.login-sub { color: var(--muted); font-size: 13px; margin-bottom: 4px; }
.login-input {
  background: var(--panel2);
  border: 1px solid var(--line);
  border-radius: 6px;
  color: var(--text);
  padding: 10px 12px;
  font-size: 14px;
}
.login-input:focus { outline: none; border-color: var(--accent); }
.login-btn { padding: 10px 12px; font-size: 14px; }
.login-msg { color: var(--danger); font-size: 13px; min-height: 18px; }