:root {
  --bg: #1a1b26;
  --surface: #24283b;
  --border: #3b4261;
  --text: #c0caf5;
  --text-dim: #565f89;
  --accent: #7aa2f7;
  --accent-hover: #89b4fa;
  --danger: #f7768e;
  --success: #9ece6a;
  --warning: #e0af68;
}

* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  height: 100vh;
  overflow: hidden;
}

/* ── Login screen ─────────────────────── */
#login-screen {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 100vh;
}

.login-box {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 2rem;
  width: 340px;
}

.login-box h1 {
  font-size: 1.4rem;
  margin-bottom: 0.3rem;
}

.login-box p {
  color: var(--text-dim);
  font-size: 0.85rem;
  margin-bottom: 1.5rem;
}

.login-box input {
  width: 100%;
  padding: 0.6rem 0.8rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.95rem;
  outline: none;
  margin-bottom: 1rem;
}

.login-box input:focus { border-color: var(--accent); }

.login-box button {
  width: 100%;
  padding: 0.6rem;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
}

.login-box button:hover { background: var(--accent-hover); }

.login-error {
  color: var(--danger);
  font-size: 0.85rem;
  margin-top: 0.5rem;
  display: none;
}

/* ── Main app ─────────────────────────── */
#app {
  display: none;
  flex-direction: column;
  height: 100vh;
}

/* ── Top bar ──────────────────────────── */
.topbar {
  display: flex;
  align-items: center;
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 0 0.5rem;
  height: 42px;
  flex-shrink: 0;
}

.topbar-title {
  font-weight: 600;
  font-size: 0.9rem;
  padding: 0 0.5rem;
  color: var(--accent);
  white-space: nowrap;
}

/* ── Tab bar ──────────────────────────── */
.tabs {
  display: flex;
  flex: 1;
  overflow-x: auto;
  gap: 2px;
  padding: 4px 0;
}

.tabs::-webkit-scrollbar { height: 0; }

.tab {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 0.8rem;
  cursor: pointer;
  white-space: nowrap;
  user-select: none;
}

.tab:hover { background: var(--bg); color: var(--text); }
.tab.active {
  background: var(--bg);
  border-color: var(--border);
  color: var(--text);
}

.tab .shell-badge {
  font-size: 0.65rem;
  padding: 1px 4px;
  border-radius: 3px;
  background: var(--border);
  color: var(--text-dim);
}

.tab .close-tab {
  font-size: 0.75rem;
  width: 18px;
  height: 18px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 4px;
  opacity: 0;
}

.tab:hover .close-tab { opacity: 0.6; }
.tab .close-tab:hover { opacity: 1; background: var(--danger); color: #fff; }

.tab-state {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
}

.tab-state.disconnected { background: var(--warning); }
.tab-state.terminated { background: var(--danger); }

.tab-name {
  cursor: text;
}

.tab-name-input {
  background: var(--bg);
  border: 1px solid var(--accent);
  border-radius: 3px;
  color: var(--text);
  font-size: 0.8rem;
  width: 80px;
  padding: 0 4px;
  outline: none;
}

/* ── New tab button ───────────────────── */
.new-tab-group {
  position: relative;
  display: flex;
  align-items: center;
}

.new-tab-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 1rem;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  margin: 0 4px;
}

.new-tab-btn:hover { color: var(--accent); border-color: var(--accent); }

.shell-menu {
  display: none;
  position: absolute;
  top: 100%;
  right: 0;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 4px;
  z-index: 100;
  min-width: 160px;
  box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

.shell-menu.open { display: block; }

.shell-option {
  display: block;
  width: 100%;
  padding: 8px 12px;
  background: none;
  border: none;
  color: var(--text);
  font-size: 0.85rem;
  text-align: left;
  border-radius: 4px;
  cursor: pointer;
}

.shell-option:hover { background: var(--bg); }

/* ── Toolbar (right side) ─────────────── */
.toolbar {
  display: flex;
  align-items: center;
  gap: 4px;
  padding-left: 8px;
}

.toolbar button {
  background: none;
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text-dim);
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
  white-space: nowrap;
}

.toolbar button:hover { color: var(--text); border-color: var(--text-dim); }

/* ── Terminal area ────────────────────── */
.terminal-container {
  flex: 1;
  position: relative;
  overflow: hidden;
}

.terminal-pane {
  position: absolute;
  inset: 0;
  display: none;
  padding: 4px;
}

.terminal-pane.active { display: block; }

.terminal-pane .xterm { height: 100%; }

/* ── File modal ───────────────────────── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.6);
  z-index: 200;
  align-items: center;
  justify-content: center;
}

.modal-overlay.open { display: flex; }

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 1.5rem;
  width: 90%;
  max-width: 500px;
  max-height: 80vh;
  overflow-y: auto;
}

.modal h2 {
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

.modal label {
  font-size: 0.85rem;
  color: var(--text-dim);
  display: block;
  margin-bottom: 0.3rem;
}

.modal input[type="text"],
.modal input[type="file"],
.modal select {
  width: 100%;
  padding: 0.5rem 0.7rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 0.9rem;
  margin-bottom: 1rem;
}

.modal-actions {
  display: flex;
  gap: 8px;
  justify-content: flex-end;
}

.modal-actions button {
  padding: 0.5rem 1rem;
  border-radius: 6px;
  border: 1px solid var(--border);
  background: none;
  color: var(--text);
  cursor: pointer;
  font-size: 0.85rem;
}

.modal-actions button.primary {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
  font-weight: 600;
}

.file-list {
  max-height: 300px;
  overflow-y: auto;
  margin-bottom: 1rem;
}

.file-entry {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 8px;
  border-radius: 4px;
  cursor: pointer;
  font-size: 0.85rem;
}

.file-entry:hover { background: var(--bg); }
.file-entry.dir { color: var(--accent); }

.breadcrumb {
  font-size: 0.8rem;
  color: var(--text-dim);
  margin-bottom: 0.5rem;
  word-break: break-all;
}

/* ── Settings panel ──────────────────── */
.settings-row {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 1rem;
}

.settings-row label {
  margin-bottom: 0;
  min-width: 80px;
}

.settings-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
}

.settings-row .range-value {
  font-size: 0.85rem;
  min-width: 30px;
  text-align: center;
}

.theme-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 6px;
  margin-bottom: 1rem;
}

.theme-swatch {
  padding: 8px;
  border: 2px solid var(--border);
  border-radius: 6px;
  cursor: pointer;
  text-align: center;
  font-size: 0.75rem;
}

.theme-swatch:hover { border-color: var(--text-dim); }
.theme-swatch.active { border-color: var(--accent); }

/* ── Status bar ───────────────────────── */
.statusbar {
  background: var(--surface);
  border-top: 1px solid var(--border);
  padding: 2px 12px;
  font-size: 0.75rem;
  color: var(--text-dim);
  display: flex;
  justify-content: space-between;
  flex-shrink: 0;
}

/* ── Touch key bar (overlay, touch devices only) ── */
.touch-keybar {
  display: none;
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  z-index: 150;
  background: rgba(36, 40, 59, 0.92);
  border-top: 1px solid var(--border);
  padding: 6px 4px;
  justify-content: center;
  gap: 4px;
  flex-wrap: nowrap;
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  box-shadow: 0 -4px 16px rgba(0, 0, 0, 0.3);
}

.touch-keybar button {
  min-width: 44px;
  min-height: 44px;
  flex: 1 1 0;
  max-width: 64px;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-size: 1rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  user-select: none;
  -webkit-user-select: none;
  -webkit-tap-highlight-color: transparent;
  transition: background 0.1s, border-color 0.1s, color 0.1s;
}

.touch-keybar button:hover {
  color: var(--text);
  border-color: var(--text-dim);
}

.touch-keybar button:active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

.touch-keybar button.kb-active {
  background: var(--accent);
  color: var(--bg);
  border-color: var(--accent);
}

@media (pointer: coarse) {
  .touch-keybar { display: flex; }
}

/* ── Responsive ───────────────────────── */
@media (max-width: 600px) {
  .topbar-title { display: none; }
  .tab .shell-badge { display: none; }
  .toolbar button span.label { display: none; }
}