/* ── Reset ──────────────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
  --bg:        #0d1117;
  --bg2:       #161b22;
  --bg3:       #1c2128;
  --bg4:       #21262d;
  --border:    #30363d;
  --border2:   #21262d;
  --accent:    #00d4ff;
  --accent-dim:#005a6e;
  --text:      #e6edf3;
  --text2:     #8b949e;
  --text3:     #484f58;
  --green:     #3fb950;
  --red:       #f85149;
  --yellow:    #d29922;
  --orange:    #f0883e;
  --r:         8px;
  --r-sm:      5px;
  --font:      -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --mono:      'JetBrains Mono','Fira Code','Cascadia Code','Courier New',monospace;
}

html, body { height: 100%; background: var(--bg); color: var(--text); font-family: var(--font); font-size: 14px; overflow: hidden; }

body { display: flex; flex-direction: column; }

/* ── Topbar ─────────────────────────────────────────────────────────────── */
#topbar {
  display: flex;
  align-items: center;
  gap: 8px;
  height: 46px;
  min-height: 46px;
  padding: 0 10px;
  background: var(--bg2);
  border-bottom: 1px solid var(--border);
  z-index: 200;
}

#main {
  flex: 1;
  overflow: hidden;
  position: relative;
  display: flex;
}

#statusbar {
  display: flex;
  align-items: center;
  gap: 10px;
  height: 26px;
  min-height: 26px;
  padding: 0 12px;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  font-size: 11.5px;
  color: var(--text2);
  font-family: var(--mono);
}

/* ── Brand ──────────────────────────────────────────────────────────────── */
#brand {
  display: flex;
  align-items: center;
  gap: 7px;
  font-weight: 700;
  font-size: 17px;
  letter-spacing: -0.5px;
  color: var(--text);
  white-space: nowrap;
  user-select: none;
  flex-shrink: 0;
}
.brand-icon { width: 20px; height: 20px; stroke: var(--accent); }
.brand-num  { color: var(--accent); }

/* ── Tabs ───────────────────────────────────────────────────────────────── */
#tab-bar {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 3px;
  overflow-x: auto;
  scrollbar-width: none;
  padding: 0 4px;
}
#tab-bar::-webkit-scrollbar { display: none; }

.tab-btn {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 4px 8px 4px 7px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--text2);
  font-size: 12.5px;
  font-family: var(--mono);
  cursor: pointer;
  white-space: nowrap;
  max-width: 220px;
  min-width: 80px;
  transition: all 0.12s;
}
.tab-btn:hover  { background: var(--bg3); color: var(--text); }
.tab-btn.active { background: var(--bg3); color: var(--text); border-color: var(--border); }
.tab-btn.bg-tab { opacity: 0.6; }

.tab-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  background: var(--text3);
  transition: background 0.2s;
}
.tab-dot.connected    { background: var(--green); }
.tab-dot.connecting   { background: var(--yellow); animation: pulse 1s infinite; }
.tab-dot.disconnected { background: var(--text3); }
.tab-dot.error        { background: var(--red); }
.tab-dot.idle         { background: var(--text3); }

.tab-label { overflow: hidden; text-overflow: ellipsis; flex: 1; text-align: left; }

.tab-close {
  width: 15px; height: 15px;
  display: flex; align-items: center; justify-content: center;
  border-radius: 3px;
  font-size: 13px;
  line-height: 1;
  color: var(--text3);
  flex-shrink: 0;
  transition: all 0.1s;
}
.tab-close:hover { background: rgba(248,81,73,0.2); color: var(--red); }

.add-tab-btn {
  display: flex; align-items: center; justify-content: center;
  width: 26px; height: 26px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text2);
  font-size: 18px; line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.12s;
}
.add-tab-btn:hover { background: var(--bg3); color: var(--text); }

/* ── Topbar actions ─────────────────────────────────────────────────────── */
#topbar-actions { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

.icon-btn {
  display: flex; align-items: center; justify-content: center;
  width: 32px; height: 32px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--text2);
  cursor: pointer;
  transition: all 0.12s;
}
.icon-btn:hover        { background: var(--bg3); color: var(--text); border-color: var(--border); }
.icon-btn svg          { width: 15px; height: 15px; }
.icon-btn-danger:hover { color: var(--red); border-color: rgba(248,81,73,0.35); }

/* ── Layout button + picker ─────────────────────────────────────────────── */
#layout-wrap { position: relative; }

.layout-btn-inner svg { width: 17px; height: 17px; }

.layout-picker {
  position: absolute;
  top: calc(100% + 6px);
  right: 0;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 10px;
  z-index: 300;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5);
  min-width: 260px;
  animation: fade-down 0.15s ease;
}

.layout-picker-label {
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--text3);
  margin-bottom: 8px;
  padding: 0 2px;
}

.layout-picker-grid {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.layout-option {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 10px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: var(--r-sm);
  color: var(--text2);
  cursor: pointer;
  font-size: 13px;
  font-family: var(--font);
  text-align: left;
  transition: all 0.1s;
  width: 100%;
}
.layout-option:hover      { background: var(--bg3); color: var(--text); border-color: var(--border); }
.layout-option.active     { background: rgba(0,212,255,0.08); color: var(--accent); border-color: rgba(0,212,255,0.3); }
.layout-option .lo-icon   { width: 32px; height: 32px; flex-shrink: 0; fill: currentColor; }
.layout-option .lo-panes  { font-size: 11px; color: var(--text3); margin-left: auto; }
.layout-option.active .lo-panes { color: var(--accent-dim); }

/* Layout SVG thumbnails */
.layout-option .lo-icon rect { opacity: 0.5; }
.layout-option:hover .lo-icon rect,
.layout-option.active .lo-icon rect { opacity: 1; }

/* ── Login panel ────────────────────────────────────────────────────────── */
#login-panel {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px 16px;
  overflow-y: auto;
}

#login-card {
  width: 100%;
  max-width: 500px;
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r);
  padding: 32px 28px;
  animation: fade-up 0.2s ease;
}

.login-hero {
  text-align: center;
  margin-bottom: 28px;
}
.login-logo {
  width: 52px; height: 52px;
  margin: 0 auto 14px;
  background: rgba(0,212,255,0.07);
  border: 1px solid rgba(0,212,255,0.2);
  border-radius: 14px;
  display: flex; align-items: center; justify-content: center;
}
.login-logo svg { width: 28px; height: 28px; stroke: var(--accent); }

#login-card h1 {
  font-size: 32px;
  font-weight: 800;
  letter-spacing: -1px;
  color: var(--text);
}
.h1-accent { color: var(--accent); }

.login-subtitle { color: var(--text2); font-size: 14px; margin-top: 4px; }

/* ── Form ───────────────────────────────────────────────────────────────── */
.form-row { display: flex; gap: 10px; }
.flex-1   { flex: 1; }
.w-port   { width: 86px; flex-shrink: 0; }

.form-group { display: flex; flex-direction: column; gap: 5px; margin-bottom: 14px; }
.form-group label { font-size: 12.5px; font-weight: 500; color: var(--text2); }
.label-opt { font-weight: 400; color: var(--text3); }

input[type=text], input[type=password], input[type=number], textarea {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  color: var(--text);
  font-family: var(--font);
  font-size: 14px;
  padding: 8px 11px;
  width: 100%;
  outline: none;
  transition: border-color 0.15s, box-shadow 0.15s;
  -webkit-appearance: none;
}
input:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0,212,255,0.1);
}
textarea { resize: vertical; font-family: var(--mono); font-size: 12px; }
input[type=number] { -moz-appearance: textfield; }
input[type=number]::-webkit-inner-spin-button { -webkit-appearance: none; }

.input-wrap { position: relative; }
.input-wrap input { padding-right: 38px; }
.input-icon-btn {
  position: absolute;
  right: 7px; top: 50%;
  transform: translateY(-50%);
  background: none; border: none;
  color: var(--text3);
  cursor: pointer;
  padding: 4px;
  display: flex; align-items: center;
  transition: color 0.1s;
}
.input-icon-btn:hover { color: var(--text2); }
.input-icon-btn svg   { width: 15px; height: 15px; }

.auth-toggle {
  display: flex;
  margin-bottom: 14px;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  overflow: hidden;
}
.auth-tab {
  flex: 1;
  padding: 7px;
  background: transparent;
  border: none;
  color: var(--text2);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.1s;
}
.auth-tab + .auth-tab { border-left: 1px solid var(--border); }
.auth-tab.active { background: var(--bg3); color: var(--text); }

.error-msg {
  background: rgba(248,81,73,0.08);
  border: 1px solid rgba(248,81,73,0.3);
  border-radius: var(--r-sm);
  color: var(--red);
  font-size: 13px;
  padding: 8px 12px;
  margin-bottom: 14px;
}

.connect-btn {
  width: 100%;
  padding: 11px;
  background: var(--accent);
  color: #000;
  font-size: 15px;
  font-weight: 700;
  border: none;
  border-radius: var(--r-sm);
  cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  gap: 8px;
  transition: background 0.15s, transform 0.08s;
  letter-spacing: 0.02em;
}
.connect-btn:hover:not(:disabled)  { background: #00bcd4; }
.connect-btn:active:not(:disabled) { transform: scale(0.985); }
.connect-btn:disabled              { opacity: 0.55; cursor: not-allowed; }

.spinner {
  width: 16px; height: 16px;
  border: 2px solid rgba(0,0,0,0.25);
  border-top-color: #000;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

.privacy-notice {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-top: 18px;
  padding: 11px 13px;
  background: rgba(0,212,255,0.04);
  border: 1px solid rgba(0,212,255,0.12);
  border-radius: var(--r-sm);
}
.notice-icon { width: 17px; height: 17px; stroke: var(--accent); flex-shrink: 0; margin-top: 2px; }
.privacy-notice p { font-size: 12px; color: var(--text2); line-height: 1.6; }

/* ── Terminal wrapper + panes ───────────────────────────────────────────── */
#terminal-wrapper {
  flex: 1;
  display: grid;
  gap: 2px;
  background: #111;
  overflow: hidden;
}

/* .pane is injected by JS */
.pane {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: #000;
  position: relative;
  outline: none;
}

.pane--active {
  box-shadow: inset 0 0 0 2px var(--accent);
}

.pane-header {
  display: none;  /* shown only in multi-pane layouts */
  align-items: center;
  gap: 7px;
  height: 28px;
  min-height: 28px;
  padding: 0 8px;
  background: rgba(22,27,34,0.95);
  border-bottom: 1px solid var(--border2);
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text2);
  user-select: none;
}

.pane-header.visible { display: flex; }

.pane-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--text3);
  flex-shrink: 0;
}
.pane-dot.connected    { background: var(--green); }
.pane-dot.connecting   { background: var(--yellow); animation: pulse 1s infinite; }
.pane-dot.disconnected { background: var(--text3); }
.pane-dot.error        { background: var(--red); }

.pane-label { flex: 1; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

.pane-close {
  display: flex; align-items: center; justify-content: center;
  width: 16px; height: 16px;
  border-radius: 3px;
  border: none;
  background: none;
  font-size: 14px;
  color: var(--text3);
  cursor: pointer;
  flex-shrink: 0;
  transition: all 0.1s;
}
.pane-close:hover { background: rgba(248,81,73,0.2); color: var(--red); }

.pane-body {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

.pane-body .xterm           { flex: 1; padding: 2px; }
.pane-body .xterm-viewport  { overflow-y: auto !important; }

/* Empty slot */
.pane--empty {
  background: var(--bg);
  align-items: center;
  justify-content: center;
  cursor: default;
}

.empty-slot-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  padding: 20px 30px;
  background: var(--bg2);
  border: 1px dashed var(--border);
  border-radius: var(--r);
  color: var(--text3);
  cursor: pointer;
  transition: all 0.15s;
  font-family: var(--font);
  font-size: 13px;
}
.empty-slot-btn:hover { background: var(--bg3); color: var(--text2); border-color: var(--accent); }
.empty-slot-btn svg   { width: 28px; height: 28px; }

/* ── Status bar ─────────────────────────────────────────────────────────── */
.sep { color: var(--text3); user-select: none; }

#status-text { transition: color 0.2s; }
#status-text.status-connected    { color: var(--green); }
#status-text.status-connecting   { color: var(--yellow); }
#status-text.status-disconnected { color: var(--text3); }
#status-text.status-error        { color: var(--red); }

.statusbar-right { margin-left: auto; display: flex; align-items: center; gap: 10px; }
.powered         { color: var(--text3); }
.powered a       { color: var(--text2); text-decoration: none; }
.powered a:hover { color: var(--accent); }
.privacy-badge   { color: var(--text3); font-size: 11px; }
#sessions-text   { color: var(--text3); }

/* ── Animations ─────────────────────────────────────────────────────────── */
@keyframes fade-up   { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes fade-down { from { opacity: 0; transform: translateY(-6px); } to { opacity: 1; transform: none; } }
@keyframes spin      { to { transform: rotate(360deg); } }
@keyframes pulse     { 0%,100% { opacity: 1; } 50% { opacity: 0.35; } }

/* ── Mobile ─────────────────────────────────────────────────────────────── */
@media (max-width: 600px) {
  #login-card      { padding: 20px 16px; }
  .form-row        { flex-direction: column; }
  .w-port          { width: 100%; }
  .privacy-badge   { display: none; }
  .powered         { display: none; }
  #brand .brand-icon { display: none; }
}

/* ── Scrollbar ──────────────────────────────────────────────────────────── */
::-webkit-scrollbar       { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text3); }