/* ══════════════════════════════════════
   Signal Generator — style.css
   ══════════════════════════════════════ */

/* ── Tokens ──────────────────────────── */
:root, [data-theme="light"] {
  --bg:      #e8e3d8;
  --paper:   #ede8df;
  --card:    #f4f0e8;
  --border:  #d0c8b8;
  --ink:     #1e1a14;
  --ink2:    #3a3228;
  --ink3:    #5c5044;
  --ink4:    #7a6e60;
  --ink5:    #a89c8c;
  --accent:  #2d6e7e;
  --accent2: #1f4f5c;
  --accent3: #e0f2f7;
  --amber:   #b06a10;
  --amber2:  #fff3e0;
  --draft-c:    #5c5044;
  --draft-bg:   #e8e3d8;
  --solid-c:    #1f4f5c;
  --solid-bg:   #d4eef4;
  --question-c: #7a4800;
  --question-bg:#fff0d4;
  --danger:  #9b2c2c;
  --shadow:  rgba(0,0,0,.08);
  --radius:  6px;
}

[data-theme="dark"] {
  --bg:      #1a1714;
  --paper:   #221f1a;
  --card:    #2a2620;
  --border:  #3a3530;
  --ink:     #eae3d8;
  --ink2:    #c8bfae;
  --ink3:    #a89880;
  --ink4:    #7a6e60;
  --ink5:    #4a4440;
  --accent:  #4ab8cc;
  --accent2: #6dd0e0;
  --accent3: #0d2f38;
  --amber:   #f0a44a;
  --amber2:  #2a1e08;
  --draft-c:    #c8bfae;
  --draft-bg:   #2a2620;
  --solid-c:    #4ab8cc;
  --solid-bg:   #0d2f38;
  --question-c: #f0a44a;
  --question-bg:#2a1e08;
  --danger:  #e57373;
  --shadow:  rgba(0,0,0,.3);
  --radius:  6px;
}

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

body {
  font-family: 'DM Mono', 'Courier New', monospace;
  font-size: 13px;
  background: var(--bg);
  color: var(--ink);
  height: 100vh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
}

/* ── App shell ───────────────────────── */
.app {
  display: flex;
  flex-direction: column;
  height: 100vh;
  overflow: hidden;
}

/* ── Header ──────────────────────────── */
.app-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 10px 20px;
  background: var(--paper);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  min-height: 50px;
}

.brand {
  font-family: 'Fraunces', serif;
  font-size: 17px;
  font-weight: 300;
  color: var(--ink2);
  white-space: nowrap;
  flex-shrink: 0;
}
.brand em { color: var(--accent); font-style: italic; }

.outline-title-wrap {
  flex: 1;
  min-width: 0;
}

.outline-title {
  display: inline-block;
  font-family: 'Fraunces', serif;
  font-size: 18px;
  font-weight: 400;
  color: var(--ink);
  outline: none;
  border-bottom: 1px dashed transparent;
  padding: 2px 4px;
  min-width: 40px;
  max-width: 100%;
  cursor: text;
  transition: border-color .15s;
}
.outline-title:hover,
.outline-title:focus { border-bottom-color: var(--accent); }
.outline-title:empty::before {
  content: attr(data-placeholder);
  color: var(--ink5);
  font-style: italic;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.hdr-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink3);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 10px;
  cursor: pointer;
  transition: background .12s, color .12s;
}
.hdr-btn:hover { background: var(--card); color: var(--ink); }
.hdr-btn.mode-btn { font-size: 14px; padding: 4px 8px; }

/* ── App body ────────────────────────── */
.app-body {
  display: flex;
  flex: 1;
  overflow: hidden;
}

/* ── Outline panel ───────────────────── */
.outline-panel {
  flex: 1;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  min-width: 0;
}

.outline-toolbar {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  background: var(--paper);
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
}

.tool-btn {
  background: none;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink3);
  font-family: inherit;
  font-size: 11px;
  padding: 3px 9px;
  cursor: pointer;
  transition: background .12s, color .12s, border-color .12s;
}
.tool-btn:hover { background: var(--accent3); color: var(--accent); border-color: var(--accent); }

.toolbar-spacer { flex: 1; }

.tool-select {
  background: var(--paper);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink3);
  font-family: inherit;
  font-size: 11px;
  padding: 3px 6px;
  cursor: pointer;
}
.tool-select:focus { outline: none; border-color: var(--accent); }

.node-list {
  flex: 1;
  overflow-y: auto;
  padding: 12px 16px 40px;
}

.empty-state {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 8px;
  color: var(--ink5);
  padding: 40px;
}
.empty-icon { font-size: 32px; opacity: .4; }
.empty-msg { font-size: 14px; }
.empty-sub { font-size: 12px; color: var(--ink5); }
.empty-sub kbd {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 4px;
  font-family: inherit;
}

/* ── Node row ────────────────────────── */
.node-row {
  position: relative;
  display: flex;
  align-items: flex-start;
  gap: 8px;
  padding: 7px 8px;
  margin-bottom: 2px;
  border-radius: var(--radius);
  border: 1px solid transparent;
  cursor: pointer;
  transition: background .1s, border-color .1s;
  user-select: none;
}
.node-row:hover { background: var(--card); }
.node-row.selected {
  background: var(--accent3);
  border-color: var(--accent);
}

/* drag states */
.node-row.dragging { opacity: .4; }
.node-row.drag-over-above { border-top: 2px solid var(--accent); }
.node-row.drag-over-below { border-bottom: 2px solid var(--accent); }

/* number */
.node-num {
  font-size: 11px;
  color: var(--ink5);
  min-width: 26px;
  text-align: right;
  padding-top: 2px;
  flex-shrink: 0;
  font-variant-numeric: tabular-nums;
}

/* drag handle */
.node-drag {
  font-size: 13px;
  color: var(--ink5);
  cursor: grab;
  padding-top: 1px;
  flex-shrink: 0;
  opacity: 0;
  transition: opacity .1s;
}
.node-row:hover .node-drag { opacity: 1; }
.node-drag:active { cursor: grabbing; }

/* main content */
.node-main {
  flex: 1;
  min-width: 0;
}

.node-descriptor {
  font-size: 13px;
  color: var(--ink);
  outline: none;
  word-break: break-word;
  cursor: text;
  padding: 1px 0;
}
.node-descriptor:empty::before {
  content: attr(data-placeholder);
  color: var(--ink5);
  font-style: italic;
}

/* type-specific descriptor styles */
.node-row[data-type="section"] .node-descriptor {
  font-family: 'Fraunces', serif;
  font-size: 15px;
  font-weight: 400;
  color: var(--accent);
}
.node-row[data-type="note"] .node-descriptor {
  font-style: italic;
  color: var(--ink4);
  font-size: 12px;
}
.node-row[data-type="milestone"] .node-descriptor {
  font-weight: 500;
  color: var(--amber);
}
.node-row[data-type="milestone"] .node-num::before {
  content: "◆ ";
  font-size: 9px;
}

.node-chips {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 4px;
  margin-top: 5px;
}

.node-type-chip {
  font-size: 10px;
  padding: 1px 6px;
  border-radius: 3px;
  text-transform: uppercase;
  letter-spacing: .04em;
  border: 1px solid transparent;
}
.node-type-chip.section   { background: var(--accent3); color: var(--accent);   border-color: var(--accent); }
.node-type-chip.item      { background: var(--card);    color: var(--ink4);    border-color: var(--border); }
.node-type-chip.note      { background: var(--card);    color: var(--ink4);    border-color: var(--border); font-style: italic; }
.node-type-chip.milestone { background: var(--amber2);  color: var(--amber);   border-color: var(--amber); }

.status-chip {
  font-size: 10px;
  padding: 1px 7px;
  border-radius: 3px;
  cursor: pointer;
  border: 1px solid transparent;
  text-transform: lowercase;
  letter-spacing: .03em;
  transition: opacity .1s;
}
.status-chip:hover { opacity: .8; }
.status-chip.draft    { background: var(--draft-bg);    color: var(--draft-c);    border-color: var(--border); }
.status-chip.solid    { background: var(--solid-bg);    color: var(--solid-c);    border-color: var(--accent); }
.status-chip.question { background: var(--question-bg); color: var(--question-c); border-color: var(--amber); }

.tag-chip {
  font-size: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 1px 5px;
  color: var(--ink4);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}

/* insert hover buttons */
.node-insert-above,
.node-insert-below {
  position: absolute;
  left: 0;
  right: 0;
  height: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity .1s;
  z-index: 2;
  pointer-events: none;
}
.node-insert-above { top: -7px; }
.node-insert-below { bottom: -7px; }

.node-row:hover .node-insert-above,
.node-row:hover .node-insert-below {
  opacity: 1;
  pointer-events: auto;
}

.insert-btn {
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: 3px;
  font-size: 10px;
  padding: 0 8px;
  height: 14px;
  cursor: pointer;
  font-family: inherit;
  line-height: 14px;
  opacity: .7;
  transition: opacity .1s;
}
.insert-btn:hover { opacity: 1; }

/* ── Properties panel ────────────────── */
.props-panel {
  width: 280px;
  flex-shrink: 0;
  border-left: 1px solid var(--border);
  background: var(--paper);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}

.props-empty {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 10px;
  color: var(--ink5);
  padding: 24px;
}
.props-empty-icon { font-size: 28px; opacity: .35; }
.props-empty-msg  { font-size: 12px; text-align: center; line-height: 1.5; }

.props-content {
  flex: 1;
  overflow-y: auto;
  padding: 16px;
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.props-section {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.props-lbl {
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: .08em;
  color: var(--ink5);
}

.props-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.props-select {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 12px;
  padding: 4px 6px;
  cursor: pointer;
}
.props-select:focus { outline: none; border-color: var(--accent); }

.props-input {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 12px;
  padding: 5px 8px;
}
.props-input:focus { outline: none; border-color: var(--accent); }

.props-textarea {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 12px;
  padding: 6px 8px;
  resize: vertical;
  min-height: 60px;
}
.props-textarea:focus { outline: none; border-color: var(--accent); }

.props-tag-row {
  display: flex;
  flex-wrap: wrap;
  gap: 4px;
  align-items: center;
}

.props-tag-chip {
  font-size: 11px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  padding: 2px 5px;
  color: var(--ink4);
  display: inline-flex;
  align-items: center;
  gap: 3px;
}
.props-tag-x {
  background: none;
  border: none;
  color: var(--ink5);
  cursor: pointer;
  font-size: 12px;
  padding: 0;
  line-height: 1;
}
.props-tag-x:hover { color: var(--danger); }

.props-tag-input {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 3px;
  color: var(--ink);
  font-family: inherit;
  font-size: 11px;
  padding: 2px 6px;
  width: 80px;
}
.props-tag-input:focus { outline: none; border-color: var(--accent); }

/* meta pairs */
.meta-pair {
  display: flex;
  gap: 6px;
  align-items: center;
}
.meta-key {
  width: 80px;
  flex-shrink: 0;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink4);
  font-family: inherit;
  font-size: 11px;
  padding: 4px 6px;
}
.meta-val {
  flex: 1;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--ink);
  font-family: inherit;
  font-size: 11px;
  padding: 4px 6px;
}
.meta-key:focus, .meta-val:focus { outline: none; border-color: var(--accent); }
.meta-del {
  background: none;
  border: none;
  color: var(--ink5);
  cursor: pointer;
  font-size: 14px;
  padding: 0 2px;
  line-height: 1;
}
.meta-del:hover { color: var(--danger); }

.props-add-btn {
  background: none;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  color: var(--ink4);
  font-family: inherit;
  font-size: 11px;
  padding: 4px 10px;
  cursor: pointer;
  text-align: left;
  transition: border-color .12s, color .12s;
}
.props-add-btn:hover { border-color: var(--accent); color: var(--accent); }

.props-delete-btn {
  background: none;
  border: 1px solid transparent;
  border-radius: var(--radius);
  color: var(--ink5);
  font-family: inherit;
  font-size: 11px;
  padding: 5px 10px;
  cursor: pointer;
  transition: border-color .12s, color .12s;
  width: 100%;
  text-align: left;
}
.props-delete-btn:hover { border-color: var(--danger); color: var(--danger); }

.props-divider {
  height: 1px;
  background: var(--border);
  margin: 2px 0;
}

/* node number in props */
.props-node-num {
  font-size: 10px;
  color: var(--ink5);
  font-variant-numeric: tabular-nums;
}

/* ── Toast ───────────────────────────── */
#toast {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(8px);
  background: var(--ink);
  color: var(--bg);
  font-size: 12px;
  padding: 7px 16px;
  border-radius: 4px;
  pointer-events: none;
  opacity: 0;
  transition: opacity .2s, transform .2s;
  z-index: 999;
  white-space: nowrap;
}
#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* ── Scrollbar ───────────────────────── */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--ink5); }