/* ============================================================
   Vibe Coder — 3-Panel UI Stylesheet
   Dark VS Code / CI terminal aesthetic.
   Uses CSS custom properties for all tokens — no hardcoded values.
   ============================================================ */

/* ─── Design Tokens ────────────────────────────────────────────────────────── */

:root {
  /* Color palette */
  --color-bg:              #1e1e1e;
  --color-surface:         #252526;
  --color-surface-raised:  #2d2d2d;
  --color-border:          #3c3c3c;
  --color-border-focus:    #007acc;

  /* Text */
  --color-text-primary:    #d4d4d4;
  --color-text-secondary:  #9d9d9d;
  --color-text-muted:      #666666;
  --color-text-inverse:    #ffffff;

  /* Brand / accent */
  --color-accent:          #007acc;
  --color-accent-hover:    #1e8ed8;
  --color-accent-active:   #005999;

  /* Semantic status */
  --color-success:         #4ec9b0;
  --color-warn:            #dcdcaa;
  --color-error:           #f44747;
  --color-info:            #9cdcfe;
  --color-running:         #569cd6;

  /* Terminal */
  --color-terminal-bg:     #0d0d0d;
  --color-terminal-text:   #cccccc;
  --color-terminal-ts:     #555555;
  --color-terminal-info:   #9cdcfe;
  --color-terminal-warn:   #dcdcaa;
  --color-terminal-error:  #f44747;
  --color-terminal-success:#4ec9b0;

  /* Progress bar */
  --color-progress-track:  #3c3c3c;
  --color-progress-fill-a: #007acc;
  --color-progress-fill-b: #4ec9b0;

  /* Top bar */
  --color-topbar-bg:       #323233;
  --color-topbar-border:   #252526;

  /* Panel header */
  --color-panel-header-bg: #2d2d2d;

  /* Badge */
  --color-badge-bg:        #3c3c3c;
  --color-badge-text:      #9cdcfe;

  /* Chat */
  --color-chat-user-bg:    #264f78;
  --color-chat-assistant-bg: #2d2d2d;
  --color-chat-input-bg:   #1e1e1e;

  /* Ship button */
  --color-ship-bg:         #16825d;
  --color-ship-hover:      #1a9b6f;
  --color-ship-text:       #ffffff;

  /* Toast */
  --color-toast-bg:        #323233;
  --color-toast-border:    #007acc;

  /* Sessions panel */
  --color-sessions-bg:     #252526;
  --color-sessions-border: #3c3c3c;
  --color-sessions-item-hover: #2a2d2e;

  /* Spacing scale */
  --space-xs:   4px;
  --space-sm:   8px;
  --space-md:  16px;
  --space-lg:  24px;
  --space-xl:  32px;
  --space-2xl: 48px;

  /* Typography */
  --font-ui:   -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', Consolas,
               'Courier New', monospace;

  --text-xs:   0.75rem;    /* 12px */
  --text-sm:   0.8125rem;  /* 13px */
  --text-base: 0.875rem;   /* 14px */
  --text-md:   1rem;       /* 16px */
  --text-lg:   1.125rem;   /* 18px */

  /* Radii */
  --radius-sm:  3px;
  --radius-md:  6px;
  --radius-lg:  8px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.4);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.5);

  /* Layout */
  --topbar-height:    56px;
  --statusbar-height: 24px;
  --panel-left-width: 30%;
  --panel-center-width: 35%;
  --panel-right-width: 35%;
}

/* ─── Reset & Base ─────────────────────────────────────────────────────────── */

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

html, body {
  height: 100%;
  overflow: hidden;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  line-height: 1.5;
  display: grid;
  grid-template-rows:
    var(--topbar-height)
    var(--statusbar-height)
    1fr;
  grid-template-columns: 1fr;
  grid-template-areas:
    "topbar"
    "statusbar"
    "workspace";
}

/* ─── Accessibility ─────────────────────────────────────────────────────────── */

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

:focus-visible {
  outline: 2px solid var(--color-border-focus);
  outline-offset: 2px;
}

/* ─── Top Bar ──────────────────────────────────────────────────────────────── */

.top-bar {
  grid-area: topbar;
  display: flex;
  align-items: center;
  gap: var(--space-md);
  padding: 0 var(--space-lg);
  background-color: var(--color-topbar-bg);
  border-bottom: 1px solid var(--color-topbar-border);
  height: var(--topbar-height);
}

.top-bar__brand {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.top-bar__logo {
  font-size: var(--text-lg);
  color: var(--color-accent);
}

.top-bar__name {
  font-size: var(--text-md);
  font-weight: 600;
  color: var(--color-text-inverse);
  white-space: nowrap;
}

.top-bar__form {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex: 1;
  min-width: 0;
}

.top-bar__url-input {
  flex: 1;
  min-width: 0;
  height: 34px;
  padding: 0 var(--space-md);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  transition: border-color 0.15s ease;
}

.top-bar__url-input::placeholder {
  color: var(--color-text-muted);
}

.top-bar__url-input:focus {
  border-color: var(--color-border-focus);
  outline: none;
}

.top-bar__template-select {
  height: 34px;
  padding: 0 var(--space-sm);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  max-width: 200px;
}

.top-bar__template-select:focus {
  border-color: var(--color-border-focus);
  outline: none;
}

.top-bar__clone-btn {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  height: 34px;
  padding: 0 var(--space-md);
  background-color: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-inverse);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: background-color 0.15s ease;
}

.top-bar__clone-btn:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.top-bar__clone-btn:active:not(:disabled) {
  background-color: var(--color-accent-active);
}

.top-bar__clone-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.top-bar__clone-btn-icon {
  font-size: var(--text-base);
}

.top-bar__actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.top-bar__sessions-btn {
  height: 30px;
  padding: 0 var(--space-md);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-secondary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  cursor: pointer;
  transition: border-color 0.15s, color 0.15s;
}

.top-bar__sessions-btn:hover {
  border-color: var(--color-text-secondary);
  color: var(--color-text-primary);
}

.top-bar__ship-btn {
  height: 34px;
  padding: 0 var(--space-md);
  background-color: var(--color-ship-bg);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-ship-text);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  transition: background-color 0.15s;
}

.top-bar__ship-btn:hover {
  background-color: var(--color-ship-hover);
}

/* ─── Status Bar ───────────────────────────────────────────────────────────── */

.status-bar {
  grid-area: statusbar;
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  padding: 0 var(--space-lg);
  background-color: var(--color-accent);
  height: var(--statusbar-height);
  overflow: hidden;
}

.status-bar__dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  flex-shrink: 0;
}

.status-bar__dot--idle    { background-color: var(--color-text-muted); }
.status-bar__dot--running { background-color: #ffffff; animation: pulse 1.2s ease-in-out infinite; }
.status-bar__dot--done    { background-color: var(--color-success); }
.status-bar__dot--error   { background-color: var(--color-error); }

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.3; }
}

.status-bar__label {
  font-size: var(--text-xs);
  color: var(--color-text-inverse);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.status-bar__progress-track {
  width: 120px;
  height: 4px;
  background-color: rgba(255, 255, 255, 0.25);
  border-radius: 2px;
  flex-shrink: 0;
  overflow: hidden;
}

.status-bar__progress-fill {
  height: 100%;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--color-progress-fill-a), var(--color-progress-fill-b));
  transition: width 0.4s ease;
  width: 0%;
}

.status-bar__percent {
  font-size: var(--text-xs);
  color: var(--color-text-inverse);
  width: 36px;
  text-align: right;
  flex-shrink: 0;
}

/* ─── Sessions Panel ───────────────────────────────────────────────────────── */

.sessions-panel {
  position: fixed;
  top: var(--topbar-height);
  right: 0;
  width: 340px;
  height: calc(100vh - var(--topbar-height));
  background-color: var(--color-sessions-bg);
  border-left: 1px solid var(--color-sessions-border);
  z-index: 100;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-md);
}

.sessions-panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-md);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
}

.sessions-panel__title {
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text-primary);
}

.sessions-panel__close {
  background: none;
  border: none;
  color: var(--color-text-secondary);
  cursor: pointer;
  font-size: var(--text-md);
  padding: var(--space-xs);
  border-radius: var(--radius-sm);
  line-height: 1;
}

.sessions-panel__close:hover {
  color: var(--color-text-primary);
  background-color: var(--color-surface-raised);
}

.sessions-panel__list {
  list-style: none;
  overflow-y: auto;
  flex: 1;
  padding: var(--space-sm);
}

.sessions-panel__empty {
  color: var(--color-text-muted);
  font-size: var(--text-sm);
  padding: var(--space-md);
  text-align: center;
}

.session-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  cursor: pointer;
  border: 1px solid transparent;
  transition: background-color 0.1s;
}

.session-item:hover {
  background-color: var(--color-sessions-item-hover);
  border-color: var(--color-border);
}

.session-item__domain {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.session-item__meta {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.session-item__status {
  display: inline-block;
  font-size: var(--text-xs);
  padding: 1px 6px;
  border-radius: 10px;
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
}

/* ─── Workspace (3-panel grid) ─────────────────────────────────────────────── */

.workspace {
  grid-area: workspace;
  display: grid;
  grid-template-columns:
    var(--panel-left-width)
    var(--panel-center-width)
    var(--panel-right-width);
  height: 100%;
  overflow: hidden;
}

/* ─── Panel shared styles ──────────────────────────────────────────────────── */

.panel {
  display: flex;
  flex-direction: column;
  height: 100%;
  overflow: hidden;
  border-right: 1px solid var(--color-border);
}

.panel--right {
  border-right: none;
}

.panel__header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-panel-header-bg);
  border-bottom: 1px solid var(--color-border);
  flex-shrink: 0;
  min-height: 36px;
}

.panel__title {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.panel__badge {
  font-size: var(--text-xs);
  padding: 2px 8px;
  background-color: var(--color-badge-bg);
  color: var(--color-badge-text);
  border-radius: 10px;
  font-family: var(--font-mono);
}

.panel__header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

/* ─── Left panel: idle ─────────────────────────────────────────────────────── */

.panel__idle {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.panel__idle-text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.7;
}

/* ─── Left panel: clone progress ──────────────────────────────────────────── */

.clone-progress {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  padding: var(--space-md);
  overflow-y: auto;
}

/* Step list */

.step-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.step-item {
  display: grid;
  grid-template-columns: 20px 1fr auto;
  align-items: center;
  gap: var(--space-sm);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  font-size: var(--text-sm);
  transition: border-color 0.2s, background-color 0.2s;
}

.step-item--pending  { opacity: 0.4; }
.step-item--running  {
  border-color: var(--color-running);
  background-color: rgba(86, 156, 214, 0.08);
  opacity: 1;
}
.step-item--done     {
  border-color: var(--color-success);
  background-color: rgba(78, 201, 176, 0.08);
  opacity: 1;
}
.step-item--error    {
  border-color: var(--color-error);
  background-color: rgba(244, 71, 71, 0.08);
  opacity: 1;
}

.step-item__icon  { font-size: var(--text-base); text-align: center; }
.step-item__label { color: var(--color-text-primary); }
.step-item__meta  { font-size: var(--text-xs); color: var(--color-text-muted); font-family: var(--font-mono); }

/* Detection results */

.detection-results {
  background-color: var(--color-surface-raised);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-md);
}

.detection-results__title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  margin-bottom: var(--space-sm);
}

.detection-results__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-xs) var(--space-md);
}

.detection-results__grid dt {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

.detection-results__grid dd {
  font-size: var(--text-xs);
  color: var(--color-info);
  font-family: var(--font-mono);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

/* Thumbnail section */

.thumbnail-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 0;
}

.thumbnail-section__title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.thumbnail-section__count {
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.thumbnail-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-sm);
  overflow-y: auto;
  flex: 1;
}

.thumbnail-card {
  border-radius: var(--radius-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
  background-color: var(--color-surface-raised);
  cursor: default;
  transition: border-color 0.15s;
}

.thumbnail-card:hover {
  border-color: var(--color-accent);
}

.thumbnail-card__img {
  width: 100%;
  aspect-ratio: 16 / 9;
  object-fit: cover;
  display: block;
  background-color: var(--color-surface);
}

.thumbnail-card__label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  padding: var(--space-xs) var(--space-sm);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* ─── Left panel: chat ─────────────────────────────────────────────────────── */

.chat-container {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: var(--space-md);
  gap: var(--space-md);
}

.chat-container__title {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.chat-messages {
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  min-height: 0;
}

.chat-message {
  display: flex;
  gap: var(--space-sm);
  align-items: flex-start;
  font-size: var(--text-sm);
}

.chat-message__role {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  font-weight: 700;
  text-transform: uppercase;
}

.chat-message--user .chat-message__role {
  background-color: var(--color-chat-user-bg);
  color: var(--color-text-inverse);
}

.chat-message--assistant .chat-message__role {
  background-color: var(--color-chat-assistant-bg);
  color: var(--color-info);
  border: 1px solid var(--color-border);
}

.chat-message__text {
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  line-height: 1.5;
  flex: 1;
}

.chat-message--user .chat-message__text {
  background-color: var(--color-chat-user-bg);
  color: var(--color-text-inverse);
}

.chat-message--assistant .chat-message__text {
  background-color: var(--color-chat-assistant-bg);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border);
}

.chat-input-row {
  display: flex;
  gap: var(--space-sm);
  flex-shrink: 0;
}

.chat-input {
  flex: 1;
  min-height: 56px;
  max-height: 120px;
  padding: var(--space-sm) var(--space-md);
  background-color: var(--color-chat-input-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  color: var(--color-text-primary);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  resize: vertical;
  line-height: 1.5;
  transition: border-color 0.15s;
}

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

.chat-input:focus {
  border-color: var(--color-border-focus);
  outline: none;
}

.chat-send-btn {
  align-self: flex-end;
  height: 36px;
  padding: 0 var(--space-md);
  background-color: var(--color-accent);
  border: none;
  border-radius: var(--radius-md);
  color: var(--color-text-inverse);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s;
}

.chat-send-btn:hover:not(:disabled) {
  background-color: var(--color-accent-hover);
}

.chat-send-btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.chat-typing {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  font-style: italic;
  flex-shrink: 0;
}

/* ─── Center panel: terminal ───────────────────────────────────────────────── */

.terminal-clear-btn {
  background: none;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: 1px 8px;
  font-size: var(--text-xs);
  cursor: pointer;
  font-family: var(--font-ui);
  transition: color 0.15s, border-color 0.15s;
}

.terminal-clear-btn:hover {
  color: var(--color-text-primary);
  border-color: var(--color-text-secondary);
}

.terminal {
  flex: 1;
  overflow-y: auto;
  background-color: var(--color-terminal-bg);
  font-family: var(--font-mono);
  font-size: var(--text-xs);
  line-height: 1.6;
  padding: var(--space-sm);
  scroll-behavior: smooth;
}

.terminal__line {
  display: flex;
  gap: var(--space-sm);
  padding: 1px 0;
  white-space: pre-wrap;
  word-break: break-all;
}

.terminal__ts {
  color: var(--color-terminal-ts);
  flex-shrink: 0;
  user-select: none;
}

.terminal__text {
  flex: 1;
}

.terminal__line--info  .terminal__text { color: var(--color-terminal-info); }
.terminal__line--warn  .terminal__text { color: var(--color-terminal-warn); }
.terminal__line--error .terminal__text { color: var(--color-terminal-error); }
.terminal__line--plain .terminal__text { color: var(--color-terminal-text); }

.terminal__line--file-write .terminal__text {
  color: var(--color-terminal-success);
}

.terminal__line--file-write::before {
  content: '✏️ ';
}

.terminal__line--done .terminal__text {
  color: var(--color-success);
  font-weight: 700;
}

/* Animated cursor on last line when running */
.terminal--running .terminal__line:last-child .terminal__text::after {
  content: '▋';
  animation: blink 1s step-end infinite;
  color: var(--color-terminal-text);
}

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

/* ─── Right panel: preview ─────────────────────────────────────────────────── */

.preview-mode-badge {
  font-size: var(--text-xs);
  padding: 2px 8px;
  border-radius: 10px;
  background-color: var(--color-badge-bg);
  color: var(--color-text-secondary);
  font-family: var(--font-mono);
}

.preview-open-btn {
  font-size: var(--text-xs);
  color: var(--color-accent);
  text-decoration: none;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  padding: 2px 8px;
  transition: background-color 0.15s;
}

.preview-open-btn:hover {
  background-color: rgba(0, 122, 204, 0.15);
}

.preview-container {
  flex: 1;
  position: relative;
  overflow: hidden;
  background-color: var(--color-bg);
}

.preview-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-xl);
}

.preview-placeholder__text {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-align: center;
  line-height: 1.7;
}

.preview-iframe {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border: none;
  background-color: #ffffff;
}

/* ─── Toast ────────────────────────────────────────────────────────────────── */

.toast {
  position: fixed;
  bottom: var(--space-lg);
  left: 50%;
  transform: translateX(-50%);
  background-color: var(--color-toast-bg);
  border: 1px solid var(--color-toast-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-lg);
  font-size: var(--text-sm);
  color: var(--color-text-primary);
  box-shadow: var(--shadow-md);
  z-index: 200;
  max-width: 480px;
  text-align: center;
  animation: slide-up 0.2s ease;
}

@keyframes slide-up {
  from { transform: translateX(-50%) translateY(8px); opacity: 0; }
  to   { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* ─── Responsive — panels stack on narrow screens ──────────────────────────── */

@media (max-width: 900px) {
  body {
    overflow: auto;
    grid-template-rows:
      var(--topbar-height)
      var(--statusbar-height)
      auto;
  }

  .workspace {
    grid-template-columns: 1fr;
    grid-template-rows: repeat(3, 480px);
    height: auto;
    overflow: visible;
  }

  .panel {
    border-right: none;
    border-bottom: 1px solid var(--color-border);
    height: 480px;
    overflow: hidden;
  }

  .panel--right {
    border-bottom: none;
  }

  .top-bar {
    flex-wrap: wrap;
    height: auto;
    padding: var(--space-sm) var(--space-md);
    gap: var(--space-sm);
  }

  .top-bar__form {
    order: 2;
    flex-basis: 100%;
  }

  .top-bar__actions {
    order: 3;
  }

  .sessions-panel {
    width: 100%;
    top: 0;
    height: 100vh;
  }
}

@media (max-width: 500px) {
  .top-bar__template-select {
    max-width: 140px;
  }

  .top-bar__clone-btn span.top-bar__clone-btn-icon {
    display: none;
  }
}

/* ─── Scrollbar styling (Webkit) ───────────────────────────────────────────── */

::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background-color: var(--color-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background-color: var(--color-text-muted);
}

/* ─── Reduced motion ───────────────────────────────────────────────────────── */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}