:root {
  --bg: #0a0f16;
  --panel: #111b26;
  --panel-2: #152433;
  --border: #27384a;
  --text: #d7e0e7;
  --muted: #96a8b7;
  --accent: #46c0ff;
  --accent-2: #e1b45a;
  --danger: #ff846d;
  --helper-off: #1a2633;
  --helper-armed: #214e6d;
  --helper-locked: #7a5021;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top right, rgba(70, 192, 255, 0.12), transparent 35%),
    linear-gradient(180deg, #081018 0%, #0b1219 100%);
  color: var(--text);
  font-family: ui-sans-serif, system-ui, sans-serif;
  overflow: hidden;
  touch-action: manipulation;
}

body {
  height: 100vh;
  height: 100dvh;
}

button,
input {
  font: inherit;
}

button {
  border: 1px solid var(--border);
  border-radius: 10px;
  background: var(--panel-2);
  color: var(--text);
  padding: 0.72rem 0.9rem;
  -webkit-tap-highlight-color: transparent;
  touch-action: manipulation;
}

button:active {
  opacity: 0.75;
}

button.ghost {
  background: transparent;
}

input {
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 10px;
  background: rgba(6, 10, 16, 0.55);
  color: var(--text);
  padding: 0.7rem 0.8rem;
  font-size: 16px; /* prevents iOS zoom on focus */
}

label {
  display: grid;
  gap: 0.35rem;
  color: var(--muted);
  font-size: 0.95rem;
}

h1,
h2,
p,
ul {
  margin: 0;
}

ul {
  padding-left: 1.2rem;
  color: var(--muted);
}

/* ── App shell: desktop = sidebar + terminal ── */

.app-shell {
  display: grid;
  height: 100vh;
  height: 100dvh;
  grid-template-columns: minmax(280px, 360px) 1fr;
}

/* ── Control panel / sidebar ── */

.control-panel {
  display: grid;
  gap: 1rem;
  padding: 1.25rem;
  padding-top: calc(1.25rem + var(--safe-top));
  border-right: 1px solid rgba(39, 56, 74, 0.65);
  background: rgba(10, 18, 27, 0.76);
  backdrop-filter: blur(18px);
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  align-content: start;
}

.panel-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.panel-close {
  display: none;
  font-size: 1.5rem;
  padding: 0.3rem 0.6rem;
}

.subtitle {
  color: var(--muted);
  line-height: 1.5;
}

.connect-form,
.fixture-panel,
.status-panel,
.notes-panel {
  display: grid;
  gap: 0.8rem;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: rgba(15, 25, 37, 0.7);
}

.button-row {
  display: flex;
  gap: 0.7rem;
  flex-wrap: wrap;
}

.status-row {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  color: var(--muted);
}

.status-row strong {
  color: var(--text);
}

/* ── Terminal panel ── */

.terminal-panel {
  display: grid;
  grid-template-rows: auto 1fr auto;
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
}

.terminal-toolbar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 0.5rem 0.75rem;
  padding-top: calc(0.5rem + var(--safe-top));
  border-bottom: 1px solid rgba(39, 56, 74, 0.55);
  background: rgba(11, 20, 30, 0.7);
  backdrop-filter: blur(12px);
}

#panel-toggle {
  display: none;
  font-size: 1.3rem;
  padding: 0.4rem 0.6rem;
}

.session-name {
  color: var(--muted);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  flex: 1;
  text-align: right;
}

.terminal-wrap {
  position: relative;
  overflow: hidden;
  padding: 0.5rem;
  touch-action: none; /* we handle pinch-zoom ourselves */
}

#terminal-canvas {
  display: block;
  width: 100%;
  height: 100%;
  border: 1px solid rgba(39, 56, 74, 0.7);
  border-radius: 12px;
  background: #0a1017;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.04);
  transform-origin: 0 0;
}

.terminal-input {
  position: absolute;
  left: 1.25rem;
  bottom: 1.25rem;
  width: 1px;
  height: 1px;
  opacity: 0.01;
  resize: none;
}

/* ── Helper key bar ── */

.helper-bar {
  display: flex;
  gap: 0.45rem;
  padding: 0.5rem;
  padding-bottom: calc(0.5rem + var(--safe-bottom));
  overflow-x: auto;
  border-top: 1px solid rgba(39, 56, 74, 0.55);
  background: rgba(11, 20, 30, 0.82);
  -webkit-overflow-scrolling: touch;
}

.helper-bar button {
  flex: 0 0 auto;
  min-width: 3.2rem;
  background: var(--helper-off);
}

.helper-bar button[data-state="armed"] {
  background: var(--helper-armed);
  border-color: rgba(70, 192, 255, 0.6);
}

.helper-bar button[data-state="locked"] {
  background: var(--helper-locked);
  border-color: rgba(225, 180, 90, 0.7);
}

/* ── Zoom indicator ── */

.zoom-indicator {
  position: absolute;
  top: 1rem;
  right: 1rem;
  padding: 0.3rem 0.6rem;
  border-radius: 8px;
  background: rgba(0, 0, 0, 0.7);
  color: var(--accent);
  font-size: 0.8rem;
  font-family: ui-monospace, monospace;
  pointer-events: none;
  opacity: 0;
  transition: opacity 0.3s;
  z-index: 5;
}

.zoom-indicator.visible {
  opacity: 1;
}

/* ── Panel overlay backdrop (mobile only) ── */

.panel-backdrop {
  display: none;
}

/* ══════════════════════════════════════════
   Mobile: stack vertically, overlay sidebar
   ══════════════════════════════════════════ */

@media (max-width: 980px) {
  .app-shell {
    grid-template-columns: 1fr;
    grid-template-rows: 1fr;
  }

  /* Sidebar becomes a slide-over overlay */
  .control-panel {
    position: fixed;
    inset: 0;
    z-index: 100;
    border-right: 0;
    background: rgba(10, 18, 27, 0.96);
    backdrop-filter: blur(24px);
    transform: translateX(-100%);
    transition: transform 0.25s ease;
    padding-bottom: calc(1.25rem + var(--safe-bottom));
  }

  .control-panel.open {
    transform: translateX(0);
  }

  .control-panel.collapsed {
    transform: translateX(-100%);
  }

  .panel-close {
    display: block;
  }

  #panel-toggle {
    display: block;
  }

  /* Backdrop behind the sidebar */
  .panel-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 99;
    background: rgba(0, 0, 0, 0.5);
  }

  .panel-backdrop.visible {
    display: block;
  }

  /* Terminal fills entire viewport */
  .terminal-panel {
    height: 100vh;
    height: 100dvh;
  }

  .terminal-wrap {
    padding: 0.25rem;
  }

  #terminal-canvas {
    border-radius: 6px;
  }

  /* ── Thumb-friendly helper bar ── */
  .helper-bar {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(3rem, 1fr));
    gap: 0.35rem;
    padding: 0.4rem;
    padding-bottom: calc(0.4rem + var(--safe-bottom));
    overflow-x: visible;
    overflow-y: auto;
    max-height: 7rem;
  }

  .helper-bar button {
    min-width: 0;
    min-height: 2.6rem;
    font-size: 0.95rem;
    padding: 0.4rem 0.2rem;
    border-radius: 8px;
  }
}

/* ── Landscape on mobile: shrink helper bar, horizontal scroll ── */

@media (max-width: 980px) and (orientation: landscape) {
  .terminal-toolbar {
    padding: 0.3rem 0.75rem;
    padding-left: calc(0.75rem + var(--safe-left));
  }

  .helper-bar {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    overflow-y: hidden;
    max-height: none;
    padding: 0.3rem 0.4rem;
    padding-bottom: calc(0.3rem + var(--safe-bottom));
    padding-left: calc(0.4rem + var(--safe-left));
    padding-right: calc(0.4rem + var(--safe-right));
  }

  .helper-bar button {
    min-height: 2.2rem;
    min-width: 2.8rem;
    font-size: 0.85rem;
    padding: 0.3rem 0.4rem;
  }

  .terminal-wrap {
    padding: 0.15rem;
    padding-left: calc(0.15rem + var(--safe-left));
    padding-right: calc(0.15rem + var(--safe-right));
  }
}

/* ── Very small screens (< 400px width) ── */

@media (max-width: 400px) {
  .helper-bar {
    grid-template-columns: repeat(auto-fill, minmax(2.5rem, 1fr));
    gap: 0.25rem;
  }

  .helper-bar button {
    font-size: 0.85rem;
    min-height: 2.4rem;
  }

  .terminal-toolbar button {
    font-size: 0.8rem;
    padding: 0.35rem 0.5rem;
  }
}