/*
  SSH Gateway — visual system
  This is an operator tool, not a marketing page: no hero, no scroll,
  everything needed fits the viewport like a real application.

  Color roles:
    ink-0/1/2   backgrounds, darkest to most elevated
    line        hairline borders
    paper/muted text, primary and secondary
    signal      the one accent color — means "live" (connected, cursor,
                primary action) and appears nowhere else
    amber/coral warning / error states only
*/

:root {
  color-scheme: dark;

  --ink-0: #0e1216;
  --ink-1: #141a20;
  --ink-2: #1b232b;
  --line: #2a343d;
  --paper: #e7ecef;
  --muted: #8fa1ac;
  --signal: #4fd1ae;
  --signal-dim: #2f6656;
  --amber: #d9a441;
  --coral: #e2685c;

  --sans: -apple-system, BlinkMacSystemFont, "Segoe UI", "Helvetica Neue", Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "SF Mono", "Cascadia Code", "JetBrains Mono",
    "Fira Code", Consolas, "Liberation Mono", monospace;

  --radius: 6px;
  --gap: 16px;
  --topbar-h: 48px;
  --tabs-h: 44px;
}

* {
  box-sizing: border-box;
}

html,
body {
  height: 100%;
}

body {
  margin: 0;
  background: var(--ink-0);
  color: var(--paper);
  font-family: var(--sans);
  font-size: 14px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  overflow: hidden;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  clip-path: inset(50%);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--signal);
  outline-offset: 1px;
}

button,
input,
textarea,
select {
  font: inherit;
  color: inherit;
}

/* ---------- top bar ---------- */

.topbar {
  height: var(--topbar-h);
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: var(--ink-1);
}

.brand {
  font-family: var(--mono);
  font-weight: 600;
  letter-spacing: -0.01em;
  font-size: 14px;
  white-space: nowrap;
}

.brand-mark {
  color: var(--signal);
}

.status {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--muted);
  flex: none;
}

.status[data-state="connecting"] .status-dot {
  background: var(--amber);
  animation: pulse 1s ease-in-out infinite;
}

.status[data-state="connected"] .status-dot {
  background: var(--signal);
  box-shadow: 0 0 0 3px var(--signal-dim);
}

.status[data-state="error"] .status-dot {
  background: var(--coral);
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.35; }
}

.topbar-node {
  margin-left: auto;
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-node strong {
  color: var(--paper);
  font-weight: 500;
}

.lang-toggle {
  flex: none;
  margin-left: 12px;
  background: none;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  color: var(--muted);
  font-family: var(--mono);
  font-size: 12px;
  padding: 4px 9px;
  cursor: pointer;
}

.lang-toggle:hover {
  color: var(--paper);
  border-color: #3a4854;
}

/* when there's no node info to push it to the far right (idle, mobile) */
.topbar-node:empty + .lang-toggle {
  margin-left: 12px;
}

/* ---------- mobile tabs ---------- */

.tabs {
  display: none;
  height: var(--tabs-h);
  border-bottom: 1px solid var(--line);
  background: var(--ink-1);
}

.tabs button {
  flex: 1;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 13px;
  border-bottom: 2px solid transparent;
  cursor: pointer;
}

.tabs button[aria-selected="true"] {
  color: var(--paper);
  border-bottom-color: var(--signal);
}

/* ---------- layout ---------- */

.layout {
  display: grid;
  grid-template-columns: 340px 1fr;
  height: calc(100dvh - var(--topbar-h));
}

.panel {
  min-width: 0;
  min-height: 0;
  overflow: hidden;
}

.panel-connect {
  border-right: 1px solid var(--line);
  background: var(--ink-1);
  overflow-y: auto;
  padding: var(--gap);
}

.panel-terminal {
  position: relative;
  background: var(--ink-0);
  display: flex;
  flex-direction: column;
}

/* ---------- form ---------- */

fieldset {
  border: none;
  margin: 0 0 20px;
  padding: 0;
}

legend {
  font-size: 11.5px;
  color: var(--muted);
  margin-bottom: 10px;
  padding: 0;
}

.field {
  margin-bottom: 12px;
}

.field label {
  display: block;
  font-size: 12.5px;
  color: var(--muted);
  margin-bottom: 5px;
}

.field-row {
  display: flex;
  gap: 10px;
}

.field-row .field {
  flex: 1;
}

.field-row .field-host {
  flex: 3;
}

.field-row .field-port {
  flex: 1;
}

input[type="text"],
input[type="number"],
input[type="password"],
textarea {
  width: 100%;
  background: var(--ink-2);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: 8px 10px;
  color: var(--paper);
}

input[type="text"],
input[type="number"],
input[type="password"] {
  font-family: var(--mono);
  font-size: 13px;
}

textarea {
  font-family: var(--mono);
  font-size: 12.5px;
  resize: vertical;
  min-height: 64px;
}

input::placeholder,
textarea::placeholder {
  color: #4c5966;
}

input:focus,
textarea:focus {
  border-color: var(--signal);
}

.secret-row {
  position: relative;
}

.secret-row input,
.secret-row textarea {
  padding-right: 60px;
}

.secret-toggle {
  position: absolute;
  right: 6px;
  top: 6px;
  background: none;
  border: none;
  color: var(--muted);
  font-size: 11.5px;
  padding: 4px 6px;
  cursor: pointer;
  border-radius: 4px;
}

.secret-toggle:hover {
  color: var(--paper);
}

.segmented {
  display: flex;
  border: 1px solid var(--line);
  border-radius: var(--radius);
  overflow: hidden;
}

.segmented input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.segmented label {
  flex: 1;
  text-align: center;
  padding: 7px 0;
  font-size: 12.5px;
  color: var(--muted);
  cursor: pointer;
  margin: 0;
  border-right: 1px solid var(--line);
}

.segmented label:last-child {
  border-right: none;
}

.segmented input:checked + label {
  background: var(--ink-2);
  color: var(--paper);
}

.segmented input:focus-visible + label {
  outline: 2px solid var(--signal);
  outline-offset: -2px;
}

input:invalid:not(:placeholder-shown) {
  border-color: var(--coral);
}

.hint {
  font-size: 11.5px;
  color: #5c6b76;
  margin-top: 6px;
}

details.advanced {
  border: 1px solid var(--line);
  border-radius: var(--radius);
  margin-bottom: 16px;
}

details.advanced summary {
  padding: 9px 10px;
  font-size: 12.5px;
  color: var(--muted);
  cursor: pointer;
  list-style: none;
}

details.advanced summary::-webkit-details-marker {
  display: none;
}

details.advanced summary::before {
  content: "+ ";
  color: var(--signal);
}

details.advanced[open] summary::before {
  content: "\2212 ";
}

details.advanced .field {
  padding: 0 10px 10px;
}

details.advanced .field:first-of-type {
  padding-top: 2px;
}

.actions {
  display: flex;
  gap: 10px;
  margin-top: 4px;
}

button.btn {
  border-radius: var(--radius);
  border: 1px solid var(--line);
  background: var(--ink-2);
  padding: 9px 14px;
  font-size: 13px;
  cursor: pointer;
  flex: 1;
}

button.btn:hover {
  border-color: #3a4854;
}

button.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

button.btn-primary {
  background: var(--signal);
  border-color: var(--signal);
  color: #05201a;
  font-weight: 600;
}

button.btn-primary:hover {
  background: #5fe0bd;
}

button.btn-primary[data-active="true"] {
  background: var(--coral);
  border-color: var(--coral);
  color: #2a0e0b;
}

button.btn-primary[data-active="true"]:hover {
  background: #ea8074;
}

.result {
  margin-top: 14px;
  border-radius: var(--radius);
  border: 1px solid var(--line);
  padding: 10px;
  font-family: var(--mono);
  font-size: 12px;
  white-space: pre-wrap;
  overflow-wrap: anywhere;
  max-height: 220px;
  overflow-y: auto;
}

.result:empty {
  display: none;
}

.result[data-tone="ok"] {
  border-color: var(--signal-dim);
  color: var(--paper);
}

.result[data-tone="error"] {
  border-color: #6b332c;
  color: #f2b3ab;
}

.privacy-note {
  font-size: 11.5px;
  color: #5c6b76;
  border-top: 1px solid var(--line);
  padding-top: 12px;
  margin-top: 4px;
}

/* ---------- terminal pane ---------- */

:root {
  --terminal-bg: #0b0f14;
}

.term-wrap {
  position: relative;
  flex: 1 1 auto;
  min-height: 0;
  min-width: 0;
  overflow: hidden;
  background: var(--terminal-bg);
}

#terminal {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  min-width: 0;
  min-height: 0;
  padding: 0;
  background: var(--terminal-bg);
}

#terminal .xterm {
  width: 100%;
  height: 100%;
  padding: 10px 12px;
  background: var(--terminal-bg);
}

#terminal .xterm-viewport,
#terminal .xterm-screen,
#terminal .xterm-screen canvas {
  background-color: var(--terminal-bg) !important;
}

#terminal .xterm-viewport {
  overflow-y: scroll !important;
  overflow-x: hidden !important;
  overscroll-behavior: contain;
  scrollbar-width: auto;
  scrollbar-color: #53616d #111820;
}

#terminal .xterm-viewport::-webkit-scrollbar {
  width: 11px;
}

#terminal .xterm-viewport::-webkit-scrollbar-track {
  background: #111820;
}

#terminal .xterm-viewport::-webkit-scrollbar-thumb {
  background: #53616d;
  border-radius: 6px;
  border: 2px solid #111820;
}

#terminal .xterm-viewport::-webkit-scrollbar-thumb:hover {
  background: #71818d;
}

#terminal .xterm-screen {
  touch-action: pan-x pan-y;
}

#terminal .xterm-helper-textarea {
  z-index: 2;
}

.terminal-toolbar {
  flex: none;
  display: flex;
  gap: 6px;
  padding: 7px 8px;
  border-top: 1px solid var(--line);
  background: var(--ink-1);
  overflow-x: auto;
  overscroll-behavior-x: contain;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  scrollbar-color: #53616d var(--ink-1);
  z-index: 5;
}

.terminal-toolbar button {
  flex: 0 0 auto;
  min-width: 42px;
  min-height: 34px;
  padding: 6px 9px;
  border: 1px solid var(--line);
  border-radius: 5px;
  background: var(--ink-2);
  color: var(--paper);
  font-family: var(--mono);
  font-size: 12px;
  cursor: pointer;
  touch-action: manipulation;
  -webkit-tap-highlight-color: transparent;
}

.terminal-toolbar button:hover {
  border-color: #3a4854;
}

.terminal-toolbar button:active {
  transform: translateY(1px);
  background: #202a33;
}

.terminal-toolbar [data-term-action="scroll-bottom"] {
  min-width: 50px;
}

.term-empty {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--mono);
  color: #3c4854;
  font-size: 13px;
  pointer-events: none;
  text-align: center;
  padding: 0 20px;
}

.term-wrap[data-live="true"] .term-empty {
  display: none;
}

/* ---------- responsive ---------- */

@media (max-width: 880px) {
  .terminal-toolbar {
    padding-bottom: max(7px, env(safe-area-inset-bottom));
  }

  #terminal {
    padding: 8px;
  }

  .tabs {
    display: flex;
  }

  .layout {
    grid-template-columns: 1fr;
    height: calc(100dvh - var(--topbar-h) - var(--tabs-h));
  }

  .panel {
    display: none;
  }

  .panel[data-active="true"] {
    display: flex;
    flex-direction: column;
  }

  .panel-connect[data-active="true"] {
    display: block;
  }

  .topbar-node {
    display: none;
  }
}

@media (max-width: 880px) {
  .panel-terminal {
    min-height: 0;
  }

  #terminal .xterm {
    padding: 8px 6px 8px 8px;
  }

  .terminal-toolbar {
    padding-bottom: calc(7px + env(safe-area-inset-bottom));
  }
}

@media (prefers-reduced-motion: reduce) {
  .status[data-state="connecting"] .status-dot {
    animation: none;
  }
}


/* Mobile terminal: preserve native touch scrolling until long-press selection starts. */
#terminal .xterm-screen,
#terminal .xterm-viewport {
  touch-action: pan-x pan-y;
}