/* ===== Reset & Base ===== */
* { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg-primary: #0f1117;
  --bg-secondary: #1a1d27;
  --bg-tertiary: #232634;
  --bg-hover: #2a2d3d;
  --border: #313244;
  --border-light: #45475a;
  --text-primary: #cdd6f4;
  --text-secondary: #a6adc8;
  --text-muted: #7f849c;
  --accent: #89b4fa;
  --accent-hover: #74c7ec;
  --success: #a6e3a1;
  --warning: #f9e2af;
  --danger: #f38ba8;
  --info: #89dceb;
  --radius: 10px;
  --radius-sm: 6px;
  --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
}

html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  font-family: "Segoe UI", "Microsoft YaHei", "PingFang SC", system-ui, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  line-height: 1.5;
}

/* Main app shell (index.html) uses sidebar + content row layout */
body.app-layout {
  flex-direction: row;
}

/* ===== Sidebar ===== */
.sidebar {
  flex: 0 0 220px;
  width: 220px;
  height: 100%;
  background: linear-gradient(180deg, #1a1d27 0%, #161821 100%);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  box-shadow: 2px 0 12px rgba(0, 0, 0, 0.2);
  overflow: hidden;
}

.sidebar-logo {
  flex: 0 0 auto;
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 16px 16px;
  border-bottom: 1px solid var(--border);
}

.sidebar-logo .logo-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--accent) 0%, var(--info) 100%);
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  flex-shrink: 0;
}

.sidebar-logo .logo-text h1 {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: -0.3px;
  line-height: 1.2;
}

.sidebar-logo .logo-text span {
  font-size: 10px;
  color: var(--text-muted);
}

/* Connection controls in sidebar */
.sidebar-connect {
  flex: 0 0 auto;
  padding: 14px 16px;
  display: flex;
  flex-direction: column;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.btn-block {
  width: 100%;
  justify-content: center;
}

.sidebar-connect .device-info {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--bg-tertiary);
  border-radius: 20px;
  border: 1px solid var(--border);
  justify-content: center;
  margin-top: 2px;
}

.sidebar-connect .device-info .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
  transition: background 0.3s;
  flex-shrink: 0;
}

.sidebar-connect .device-info.connected .dot { background: var(--success); box-shadow: 0 0 8px var(--success); }
.sidebar-connect .device-info.error .dot { background: var(--danger); box-shadow: 0 0 8px var(--danger); }

.sidebar-connect .device-info .status-text {
  font-size: 12px;
  color: var(--text-secondary);
}

/* Sidebar navigation */
.sidebar-nav {
  flex: 1 1 auto;
  padding: 10px 10px;
  display: flex;
  flex-direction: column;
  gap: 2px;
  overflow-y: auto;
}

.nav-item {
  background: none;
  border: none;
  color: var(--text-secondary);
  padding: 11px 14px;
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  border-radius: 8px;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  gap: 10px;
  text-align: left;
  width: 100%;
  font-family: inherit;
}

.nav-item:hover {
  color: var(--text-primary);
  background: var(--bg-hover);
}

.nav-item.active {
  color: var(--accent);
  background: rgba(137, 180, 250, 0.12);
  border: 1px solid rgba(137, 180, 250, 0.25);
}

.nav-item .nav-icon {
  font-size: 16px;
  width: 20px;
  text-align: center;
  flex-shrink: 0;
}

.nav-item .nav-label {
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ===== Iframe Page Header (used by shell/tty/portforward/filemgr pages) ===== */
.header {
  flex: 0 0 auto;
  background: linear-gradient(135deg, #1a1d27 0%, #232634 100%);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
}

.header .spacer { flex: 1; }

.frame-header {
  padding: 8px 16px;
  gap: 10px;
}

.frame-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

/* ===== Main Content ===== */
.main {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  overflow: hidden;
}

.tab-pane {
  display: none;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.tab-pane.active { display: flex; }

/* ===== Iframe Tool Frame ===== */
.tool-frame {
  flex: 1;
  width: 100%;
  height: 100%;
  border: none;
  background: var(--bg-primary);
}

/* ===== Frame Header (compact header for iframed pages) ===== */
.frame-header {
  padding: 8px 16px;
  gap: 10px;
}

.frame-label {
  font-size: 13px;
  font-weight: 600;
  color: var(--accent);
}

.header-hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-right: 12px;
}

/* ===== Shell Tab ===== */
.shell-container {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 16px;
  gap: 16px;
  overflow: hidden;
}

.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
}

.card-title {
  font-size: 15px;
  font-weight: 600;
  margin-bottom: 14px;
  display: flex;
  align-items: center;
  gap: 8px;
  color: var(--text-primary);
}

.card-title .icon { font-size: 18px; }

.btn {
  border: none;
  border-radius: var(--radius-sm);
  padding: 9px 18px;
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.btn-sm {
  padding: 6px 14px;
  font-size: 12px;
}

.btn-primary {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-hover) 100%);
  color: var(--bg-primary);
}
.btn-primary:hover { opacity: 0.9; transform: translateY(-1px); }
.btn-primary:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border-light);
}
.btn-secondary:hover { background: var(--bg-hover); border-color: var(--accent); }
.btn-secondary:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-danger {
  background: var(--danger);
  color: var(--bg-primary);
}
.btn-danger:hover { opacity: 0.9; }

/* Shell Command Area */
.shell-card {
  flex: 1;
  display: flex;
  flex-direction: column;
  padding: 20px;
  min-height: 0;
}

.command-input-row {
  display: flex;
  gap: 10px;
  margin-bottom: 14px;
}

.command-input {
  flex: 1;
  padding: 10px 14px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 13px;
  outline: none;
  transition: border-color 0.2s;
}

.command-input:focus { border-color: var(--accent); }
.command-input:disabled { opacity: 0.5; cursor: not-allowed; }
.command-input::placeholder { color: var(--text-muted); }

.output-area {
  flex: 1 1 auto;
  min-height: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px;
  overflow: auto;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  line-height: 1.6;
  white-space: pre-wrap;
  word-break: break-all;
  color: #d4d4d4;
}

.output-area .cmd-prefix { color: var(--accent); }
.output-area .stderr { color: var(--danger); }
.output-area .sys-msg { color: var(--text-muted); font-style: italic; }

/* ===== Port Forwarding Tab ===== */
.pf-container {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 12px;
  overflow: hidden;
}

.pf-config {
  padding: 16px 20px;
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: flex-end;
}

.fld {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.fld label {
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fld input {
  background: var(--bg-tertiary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  padding: 7px 12px;
  font-size: 13px;
  outline: none;
  font-family: "Cascadia Code", Consolas, monospace;
  transition: border-color 0.2s;
}

.fld input:focus { border-color: var(--accent); }
.fld input:disabled { opacity: 0.5; }

#f-host input { width: 150px; }
#f-port input { width: 80px; }

.pf-status {
  font-size: 12px;
  color: var(--text-muted);
  padding-bottom: 6px;
  display: flex;
  align-items: center;
  gap: 6px;
}

.pf-status .dot {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-muted);
}

.pf-status.open .dot { background: var(--success); box-shadow: 0 0 6px var(--success); }
.pf-status.error .dot { background: var(--danger); box-shadow: 0 0 6px var(--danger); }

/* Connection List */
.conn-list-wrap {
  flex: 0 0 auto;
  max-height: 140px;
  overflow-y: auto;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
}

.conn-list { width: 100%; border-collapse: collapse; }

.conn-list th {
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  padding: 8px 12px;
  text-align: left;
  font-size: 11px;
  color: var(--text-muted);
  font-weight: 600;
  border-bottom: 1px solid var(--border);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.conn-list td {
  padding: 6px 12px;
  font-size: 12px;
  cursor: pointer;
  border-bottom: 1px solid rgba(49, 50, 68, 0.3);
  font-family: "Cascadia Code", Consolas, monospace;
}

.conn-list tr:hover { background: rgba(137, 180, 250, 0.08); }
.conn-list tr.selected { background: rgba(137, 180, 250, 0.18); }
.conn-list tr.closed { color: var(--text-muted); }

.conn-list td.cid { width: 50px; color: var(--accent); }
.conn-list td.target { color: var(--text-secondary); }
.conn-list td.state { width: 60px; text-align: center; }
.conn-list td.act { width: 50px; text-align: center; }

.conn-list .del-btn {
  background: none;
  border: none;
  color: var(--danger);
  cursor: pointer;
  font-size: 16px;
  padding: 0 4px;
  line-height: 1;
}

.conn-list .del-btn:hover { color: #eb6f92; }
.conn-list .del-btn:disabled { color: var(--border-light); cursor: not-allowed; }

/* IO Area */
.io-area {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.pane {
  flex: 1 1 50%;
  min-height: 0;
  display: flex;
  flex-direction: column;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  overflow: hidden;
}

.pane-head {
  flex: 0 0 auto;
  background: var(--bg-tertiary);
  padding: 8px 14px;
  font-size: 12px;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
  border-bottom: 1px solid var(--border);
}

.pane-head .recv { color: var(--info); }
.pane-head .send { color: var(--success); }

.mode-tabs {
  display: flex;
  gap: 0;
  margin-left: auto;
}

.mode-tabs button {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  padding: 3px 10px;
  font-size: 11px;
  cursor: pointer;
  height: 24px;
}

.mode-tabs button:first-child { border-radius: 4px 0 0 4px; }
.mode-tabs button:last-child { border-radius: 0 4px 4px 0; border-left: none; }
.mode-tabs button.active { background: var(--accent); color: var(--bg-primary); border-color: var(--accent); }

.pane-body { flex: 1 1 auto; min-height: 0; display: flex; }

.io-text {
  flex: 1;
  background: var(--bg-primary);
  border: none;
  color: var(--text-primary);
  padding: 12px;
  font-family: "Cascadia Code", Consolas, monospace;
  font-size: 12.5px;
  resize: none;
  outline: none;
  line-height: 1.5;
  white-space: pre-wrap;
  word-break: break-all;
}

.io-text::placeholder { color: var(--text-muted); }

/* Send Bar */
.send-bar {
  flex: 0 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  display: flex;
  gap: 10px;
  align-items: center;
}

.send-bar .hint {
  font-size: 11px;
  color: var(--text-muted);
  margin-left: auto;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Status Bar */
.statusbar {
  flex: 0 0 auto;
  background: var(--bg-secondary);
  border-top: 1px solid var(--border);
  padding: 6px 16px;
  font-size: 11px;
  color: var(--text-muted);
  display: flex;
  gap: 16px;
}

.statusbar .msg { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.statusbar .bytes { color: var(--warning); }

/* ===== xterm Terminal Tab ===== */
.tty-container {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 10px;
  overflow: hidden;
}

.tty-toolbar {
  flex: 0 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--shadow);
}

.tty-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.tty-title .icon { font-size: 16px; }

.tty-actions {
  display: flex;
  gap: 8px;
}

.term-status {
  margin-left: auto;
  font-size: 12px;
  color: var(--text-muted);
  padding: 4px 12px;
  background: var(--bg-tertiary);
  border-radius: 12px;
  border: 1px solid var(--border);
}

.term-status.connected { color: var(--success); border-color: var(--success); }
.term-status.error { color: var(--danger); border-color: var(--danger); }

.terminal-wrap {
  flex: 1 1 auto;
  min-height: 0;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

#terminal-container {
  width: 100%;
  height: 100%;
  padding: 8px;
  box-sizing: border-box;
  overflow: hidden;
}

#terminal-container .xterm {
  height: 100%;
  width: 100%;
}

#terminal-container .xterm-viewport {
  overflow-y: auto !important;
}

#terminal-container .xterm-screen {
  height: 100%;
}

/* ===== File Manager Tab ===== */
.fm-container {
  flex: 1 1 auto;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: 12px;
  gap: 10px;
  overflow: hidden;
}

.fm-toolbar {
  flex: 0 0 auto;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 8px 10px;
  display: flex;
  gap: 6px;
  align-items: center;
  flex-wrap: wrap;
  box-shadow: var(--shadow);
}

.fm-pathbar-input {
  height: 30px;
  padding: 0 6px;
  flex: 1;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 14px;
  font-family: "Cascadia Code", Consolas, monospace;
  outline: none;
  min-width: 80px;
}

.fm-pathbar-input::placeholder { color: var(--text-muted); }

.fm-list-wrap {
  flex: 1 1 auto;
  min-height: 0;
  overflow: auto;
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  position: relative;
}

.fm-list-wrap.dragover {
  background: rgba(137, 180, 250, 0.1);
  outline: 2px dashed var(--accent);
  outline-offset: -4px;
}

.fm-list {
  width: 100%;
  border-collapse: collapse;
}

.fm-list th {
  position: sticky;
  top: 0;
  z-index: 1;
  background: var(--bg-secondary);
  border-bottom: 1px solid var(--border);
  padding: 8px 12px;
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  color: var(--accent);
  cursor: pointer;
  user-select: none;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.fm-list th:hover { color: var(--text-primary); }

.fm-list td {
  padding: 6px 12px;
  border-bottom: 1px solid rgba(49, 50, 68, 0.3);
  font-size: 12px;
  cursor: pointer;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.fm-list tr:hover { background: rgba(137, 180, 250, 0.06); }
.fm-list tr.selected { background: rgba(137, 180, 250, 0.15); }

.fm-list td.icon-col { width: 32px; text-align: center; }
.fm-list td.name-col { max-width: 0; overflow: hidden; text-overflow: ellipsis; }
.fm-list td.size-col { width: 90px; text-align: right; font-family: "Cascadia Code", Consolas, monospace; color: var(--text-secondary); }
.fm-list td.date-col { width: 140px; color: var(--text-muted); font-family: "Cascadia Code", Consolas, monospace; }

.icon-dir { color: var(--warning); }
.icon-file { color: var(--accent); }
.icon-link { color: #f5c2e7; }

.fm-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  height: 100%;
  color: var(--text-muted);
  gap: 8px;
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  pointer-events: none;
}

.fm-empty .big { font-size: 32px; }

/* 上传进度 */
.fm-progress {
  display: none;
  position: absolute;
  bottom: 10px;
  left: 10px;
  right: 10px;
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  padding: 10px 14px;
  z-index: 100;
  max-height: 200px;
  overflow-y: auto;
}

.fm-progress.show { display: block; }

.prog-item {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-size: 12px;
}

.prog-item .name {
  flex: 1;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.prog-item .bar {
  width: 120px;
  height: 8px;
  background: var(--bg-tertiary);
  border-radius: 4px;
  overflow: hidden;
}

.prog-item .bar-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.2s;
}

.prog-item .pct {
  width: 40px;
  text-align: right;
  color: var(--text-secondary);
  font-family: "Cascadia Code", Consolas, monospace;
}

.prog-item.done .bar-fill { background: var(--success); }
.prog-item.err .bar-fill { background: var(--danger); }

/* ===== Scrollbar ===== */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-light); border-radius: 4px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-muted); }

/* ===== Responsive ===== */
@media (max-width: 768px) {
  .sidebar {
    flex: 0 0 56px;
    width: 56px;
  }
  .sidebar-logo .logo-text { display: none; }
  .sidebar-connect .device-info .status-text { display: none; }
  .sidebar-connect { padding: 10px 8px; }
  .sidebar-connect .btn span { display: none; }
  .nav-item .nav-label { display: none; }
  .nav-item { justify-content: center; padding: 11px 0; }
  .header { padding: 10px 16px; flex-wrap: wrap; }
  .header .logo-text h1 { font-size: 15px; }
  .shell-container, .pf-container, .tty-container, .fm-container { padding: 12px; }
}