/* ── Filmstrip Viewer — Theme Variables ──────── */

:root {
  /* Light theme (default) */
  --bg: #fafafa;
  --bg-alt: #f5f5f5;
  --bg-surface: #fff;
  --bg-topbar: #f0f0f0;
  --text: #1a1a1a;
  --text-secondary: #444;
  --text-muted: #888;
  --text-faint: #999;
  --text-dim: #bbb;
  --border: #d8d8d8;
  --border-light: #e0e0e0;
  --accent: #8b5e2a;
  --accent-bg: #faf3e8;
  --accent-border: #d4b88a;
  --blue: #2565b0;
  --blue-bg: #eef4fb;
  --green: #2e7d32;
  --green-dark: #1e8449;
  --green-bg: #e8f5e9;
  --green-bg-surface: #f0f8f0;
  --green-border: #c8e6c9;
  --purple: #8e44ad;
  --purple-bg: #f3e5f5;
  --red: #c0392b;
  --red-bg: #fde8e8;
  --red-border: #e8a0a0;
  --amber: #c0892a;
  --amber-bg: #fdf3e3;
  --blue-tag: #1565c0;
  --blue-tag-bg: #e3f2fd;
  --purple-tag: #7b1fa2;
  --purple-tag-bg: #f3e5f5;
  --raw-key: #2565b0;
  --raw-str: #4a7a30;
  --raw-num: #8b5e2a;
  --raw-bool: #c0392b;
  --raw-null: #999;
  --hover-bg: #eaeaea;
  --card-arrow: #bbb;
  --drop-bg: rgba(250, 250, 250, 0.92);
  --modal-backdrop: rgba(0, 0, 0, 0.3);
  --modal-shadow: rgba(0, 0, 0, 0.12);
  --scrollbar: #ccc;
  --scrollbar-hover: #aaa;
  --upload-bg: #1a1a1a;
  --upload-text: #fff;
  --upload-hover: #333;
}

[data-theme="dark"] {
  --bg: #0a0a0f;
  --bg-alt: #0c0c14;
  --bg-surface: #12121e;
  --bg-topbar: #0c0c14;
  --text: #c8c8d0;
  --text-secondary: #aaa;
  --text-muted: #666680;
  --text-faint: #555;
  --text-dim: #333;
  --border: #1a1a2e;
  --border-light: #1a1a2e;
  --accent: #d4a054;
  --accent-bg: #1a1510;
  --accent-border: #3a2a1a;
  --blue: #5a9bf5;
  --blue-bg: #0e1020;
  --green: #6a9a6a;
  --green-dark: #27ae60;
  --green-bg: #1a2a1a;
  --green-bg-surface: #0e1a0e;
  --green-border: #1a2a1a;
  --purple: #9b59b6;
  --purple-bg: #2a1a2a;
  --red: #e07070;
  --red-bg: #2a1a1a;
  --red-border: #5a2a2a;
  --amber: #d4a054;
  --amber-bg: rgba(212, 160, 84, 0.15);
  --blue-tag: #5a9bf5;
  --blue-tag-bg: #1a1a2a;
  --purple-tag: #9b88ce;
  --purple-tag-bg: #2a1a2a;
  --raw-key: #5a9bf5;
  --raw-str: #a8c880;
  --raw-num: #d4a054;
  --raw-bool: #e07070;
  --raw-null: #666;
  --hover-bg: #12121e;
  --card-arrow: #444;
  --drop-bg: rgba(10, 10, 15, 0.9);
  --modal-backdrop: rgba(0, 0, 0, 0.75);
  --modal-shadow: rgba(0, 0, 0, 0.3);
  --scrollbar: #1a1a2e;
  --scrollbar-hover: #2a2a3e;
  --upload-bg: #f0f0f0;
  --upload-text: #111;
  --upload-hover: #fff;
}

/* ── Base ────────────────────────────────────── */
* { margin: 0; padding: 0; box-sizing: border-box; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  font-size: 13px;
  line-height: 1.5;
  height: 100vh;
  overflow: hidden;
}

#app {
  display: grid;
  grid-template-columns: 220px 1fr;
  grid-template-rows: 40px 1fr;
  height: 100vh;
}

/* ── Top bar ──────────────────────────────────── */

#top-bar {
  grid-column: 1 / -1;
  grid-row: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 12px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-topbar);
}

.bar-left { display: flex; align-items: center; gap: 8px; }
.bar-center { display: flex; gap: 2px; }
.bar-right { display: flex; align-items: center; gap: 12px; }

.divider { color: var(--text-dim); }
.title { color: var(--accent); font-size: 0.85rem; font-weight: 600; }

/* WebSocket status indicator */
.ws-indicator {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--text-dim);
  margin-left: 4px;
}
.ws-connected { background: #27ae60; }
.ws-connecting { background: var(--accent); animation: pulse 1s infinite; }
.ws-disconnected { background: var(--text-dim); }
@keyframes pulse { 0%, 100% { opacity: 1; } 50% { opacity: 0.4; } }

/* Theme toggle */
.theme-toggle {
  background: none;
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
}
.theme-toggle:hover { color: var(--text); }

.view-tab {
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
}
.view-tab:hover { color: var(--text); }
.view-tab.active {
  color: var(--accent);
  border-color: var(--accent-border);
  background: var(--accent-bg);
}

.panel-toggle {
  background: none;
  border: 1px solid transparent;
  border-radius: 4px;
  color: var(--text-muted);
  font-family: inherit;
  font-size: 0.75rem;
  padding: 4px 10px;
  cursor: pointer;
}
.panel-toggle:hover { color: var(--text); }
.panel-toggle.active {
  color: var(--accent);
  background: var(--accent-bg);
  border-color: var(--accent-border);
}

/* Raw JSON view */
.raw-json {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--text-secondary);
  padding: 12px;
  background: var(--bg-alt);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  max-height: 100%;
  overflow-y: auto;
}
.raw-json .raw-key { color: var(--raw-key); }
.raw-json .raw-str { color: var(--raw-str); }
.raw-json .raw-num { color: var(--raw-num); }
.raw-json .raw-bool { color: var(--raw-bool); }
.raw-json .raw-null { color: var(--raw-null); }

.upload-btn {
  background: var(--upload-bg);
  border: 1px solid var(--upload-bg);
  border-radius: 4px;
  color: var(--upload-text);
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 14px;
  cursor: pointer;
}
.upload-btn:hover { background: var(--upload-hover); border-color: var(--upload-hover); }

/* ── Frame list sidebar ──────────────────────── */

#frame-list {
  grid-column: 1;
  grid-row: 2;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  background: var(--bg-alt);
  padding: 6px;
}

.frame-card {
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 4px;
}
.frame-card:hover { background: var(--hover-bg); }
.frame-card.selected {
  border-color: var(--accent);
  background: var(--accent-bg);
}

.frame-concern {
  font-size: 0.72rem;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.frame-meta {
  display: flex;
  gap: 8px;
  margin-top: 3px;
  font-size: 0.65rem;
  color: var(--text-muted);
}

.tier-badge {
  display: inline-block;
  padding: 0 5px;
  border-radius: 3px;
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
}
.tier-haiku { background: var(--green-bg); color: var(--green); }
.tier-sonnet { background: var(--blue-tag-bg); color: var(--blue-tag); }
.tier-opus { background: var(--purple-tag-bg); color: var(--purple-tag); }

/* ── Main content ────────────────────────────── */

#main-content {
  grid-column: 2;
  grid-row: 2;
  overflow: auto;
  position: relative;
}

.view-panel { display: none; height: 100%; }
.view-panel.active { display: flex; }

.empty-state {
  color: var(--text-faint);
  font-size: 0.8rem;
  padding: 2rem;
  text-align: center;
}
.empty-state.large { font-size: 1rem; margin: auto; }
.empty-state .dim { font-size: 0.75rem; color: var(--text-dim); }

/* ── C-loop view ─────────────────────────────── */

#c-view {
  flex-direction: row;
  overflow: hidden;
}

.c-half {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
  min-width: 0;
}

.c-half.hidden { display: none; }

#c-input { border-right: 1px solid var(--border); }
#c-input:last-child, #c-input.solo { border-right: none; }

.c-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 10px;
  padding-bottom: 6px;
  border-bottom: 1px solid var(--border-light);
}

.ctx-section { margin-bottom: 16px; }

.ctx-section-header {
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--blue);
  margin-bottom: 6px;
  padding: 4px 8px;
  background: var(--blue-bg);
  border-radius: 3px;
}

.ctx-section-body { padding: 0 4px; }

.ctx-section-body pre {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

.ctx-columns {
  display: flex;
  overflow-x: auto;
  overflow-y: hidden;
  max-height: 300px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-surface);
}

.col-columns { display: flex; flex: 1; overflow-x: auto; overflow-y: hidden; }
.col-column {
  min-width: 240px;
  max-width: 300px;
  border-right: 1px solid var(--border-light);
  overflow-y: auto;
  flex-shrink: 0;
  padding: 6px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.col-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 8px 10px;
  cursor: pointer;
  display: flex;
  gap: 8px;
  align-items: flex-start;
}
.col-card:hover { border-color: var(--text-muted); }
.col-card.selected { border-color: var(--accent); background: var(--accent-bg); }
.col-card.has-children .col-text::after { content: ' \2192'; color: var(--card-arrow); }
.col-digit {
  color: var(--blue);
  font-size: 0.65rem;
  font-weight: 600;
  min-width: 12px;
  flex-shrink: 0;
}
.col-text {
  font-size: 0.7rem;
  line-height: 1.45;
  color: var(--text);
}

#c-output-text {
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.72rem;
  line-height: 1.6;
  color: var(--text);
  margin-bottom: 16px;
}

.tool-card {
  background: var(--green-bg-surface);
  border: 1px solid var(--green-border);
  border-radius: 5px;
  padding: 8px 10px;
  margin-bottom: 6px;
  font-size: 0.7rem;
}
.tool-name { color: var(--green); font-weight: 600; }
.tool-io { color: var(--text-muted); margin-top: 3px; font-size: 0.65rem; }

/* ── B-loop view ─────────────────────────────── */

#b-view { flex-direction: row; }

.b-sidebar {
  width: 200px;
  border-right: 1px solid var(--border);
  overflow-y: auto;
  padding: 6px;
  flex-shrink: 0;
}

.b-card {
  padding: 8px 10px;
  border: 1px solid transparent;
  border-radius: 5px;
  cursor: pointer;
  margin-bottom: 4px;
  font-size: 0.72rem;
}
.b-card:hover { background: var(--hover-bg); }
.b-card.selected { border-color: var(--blue); background: var(--blue-bg); }
.b-card-label { color: var(--blue); font-weight: 600; }
.b-card-info { color: var(--text-muted); font-size: 0.65rem; margin-top: 2px; }

.b-main {
  flex: 1;
  overflow-y: auto;
  padding: 12px;
}

.b-section-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  text-transform: uppercase;
  margin: 12px 0 6px;
}
.b-section-label:first-child { margin-top: 0; }

.msg-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 10px 12px;
  margin-bottom: 6px;
}
.msg-role {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.msg-role-user { color: var(--blue); }
.msg-role-assistant { color: var(--accent); }
.msg-content {
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 200px;
  overflow-y: auto;
}

.resp-block {
  background: var(--bg-surface);
  border-left: 3px solid var(--border);
  border-radius: 0 5px 5px 0;
  padding: 10px 12px;
  margin-bottom: 6px;
  font-size: 0.7rem;
}
.resp-block.type-text { border-left-color: var(--amber); }
.resp-block.type-tool_use { border-left-color: var(--green-dark); }
.resp-block.type-thinking { border-left-color: var(--purple); }
.resp-block.type-server_tool_use { border-left-color: #2980b9; }

.resp-type {
  font-size: 0.6rem;
  font-weight: 600;
  text-transform: uppercase;
  margin-bottom: 4px;
}
.resp-type-text { color: var(--accent); }
.resp-type-tool_use { color: var(--green-dark); }
.resp-type-thinking { color: var(--purple); }
.resp-type-server_tool_use { color: #2980b9; }

.resp-content {
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 300px;
  overflow-y: auto;
}

/* ── A-loop view ─────────────────────────────── */

#a-view {
  flex-direction: column;
  overflow-y: auto;
  padding: 12px;
}

#a-blocks {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.a-block {
  background: var(--bg-surface);
  border-left: 4px solid var(--border);
  border-radius: 0 6px 6px 0;
  padding: 12px 14px;
}
.a-block.type-text { border-left-color: var(--amber); }
.a-block.type-tool_use { border-left-color: var(--green-dark); }
.a-block.type-tool_result { border-left-color: var(--green); }
.a-block.type-thinking { border-left-color: var(--purple); }
.a-block.type-server_tool_use { border-left-color: #2980b9; }

.a-block-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
}

.a-block-type {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  padding: 2px 6px;
  border-radius: 3px;
}
.atype-text { background: var(--amber-bg); color: var(--accent); }
.atype-tool_use { background: var(--green-bg); color: var(--green); }
.atype-tool_result { background: var(--green-bg); color: var(--green-dark); }
.atype-thinking { background: var(--purple-bg); color: var(--purple); }
.atype-server_tool_use { background: var(--blue-tag-bg); color: #2980b9; }

.a-block-detail {
  font-size: 0.65rem;
  color: var(--text-faint);
}

.a-block-content {
  font-size: 0.7rem;
  color: var(--text-secondary);
  white-space: pre-wrap;
  word-break: break-word;
  max-height: 400px;
  overflow-y: auto;
}

/* ── Drag-and-drop overlay ───────────────────── */

.drop-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: var(--drop-bg);
  z-index: 100;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  color: var(--accent);
  border: 2px dashed var(--accent);
  margin: 8px;
  border-radius: 8px;
}
.drop-overlay.active { display: flex; }

/* ── Raw file modal ──────────────────────────── */

.modal-overlay {
  position: fixed;
  inset: 0;
  background: var(--modal-backdrop);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
}

.modal-box {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 8px;
  max-width: 90vw;
  max-height: 85vh;
  display: flex;
  flex-direction: column;
  min-width: 600px;
  box-shadow: 0 4px 24px var(--modal-shadow);
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-bottom: 1px solid var(--border-light);
  font-size: 0.75rem;
  color: var(--accent);
}

.modal-close {
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  padding: 2px 10px;
  cursor: pointer;
  line-height: 1;
}
.modal-close:hover { border-color: var(--accent); }

.modal-remove {
  background: var(--red-bg);
  border: 1px solid var(--red-border);
  border-radius: 4px;
  color: var(--red);
  font-family: inherit;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 4px 12px;
  cursor: pointer;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}
.modal-remove:hover { border-color: var(--red); }

.modal-content {
  padding: 14px;
  overflow: auto;
  flex: 1;
  white-space: pre-wrap;
  word-break: break-word;
  font-size: 0.7rem;
  line-height: 1.6;
  color: var(--text-secondary);
}

/* ── Scrollbar ───────────────────────────────── */

::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--scrollbar); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--scrollbar-hover); }