/* apps/notes/style.css */

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

:root {
  --bg:      #0a0b0e;
  --bg2:     #0f1117;
  --surface: #1a1d26;
  --border:  #2a2d3a;
  --border2: #363a4d;
  --accent:  #00e5ff;
  --accent2: #7b5ea7;
  --accent3: #ff4d6d;
  --green:   #00ffa3;
  --yellow:  #ffd166;
  --text:    #e2e4ed;
  --text2:   #8b8fa8;
  --text3:   #555870;
  --mono:    'JetBrains Mono', monospace;
  --r:       4px;
  --toolbar: 44px;
}

html, body {
  height: 100%; overflow: hidden;
  background: var(--bg); color: var(--text);
  font-family: var(--mono);
}

/* ── Toolbar ── */
.toolbar {
  position: fixed; top: 0; left: 0; right: 0;
  height: var(--toolbar);
  display: flex; align-items: center; gap: 6px;
  padding: 0 12px;
  background: var(--bg2); border-bottom: 1px solid var(--border);
  z-index: 100; flex-wrap: nowrap; overflow-x: auto;
}

.tool-group { display: flex; align-items: center; gap: 3px; flex-shrink: 0; }
.tool-sep   { width: 1px; height: 20px; background: var(--border); flex-shrink: 0; margin: 0 2px; }

/* Tool buttons — pen/eraser/text/latex */
.tool-btn {
  width: 30px; height: 30px; border-radius: var(--r);
  background: none; border: 1px solid var(--border);
  color: var(--text2); font-size: 0.9rem;
  cursor: pointer; transition: 0.15s ease;
  display: flex; align-items: center; justify-content: center;
}
.tool-btn:hover { border-color: var(--border2); color: var(--text); }
.tool-btn.active {
  background: rgba(0,229,255,0.1);
  border-color: var(--accent); color: var(--accent);
}

/* Color dots */
.color-dot {
  width: 18px; height: 18px; border-radius: 50%;
  border: 2px solid transparent; cursor: pointer;
  flex-shrink: 0; transition: 0.15s ease;
}
.color-dot:hover { transform: scale(1.2); }
.color-dot.active { border-color: var(--text); transform: scale(1.25); }

/* Size slider */
.size-slider {
  width: 70px; flex-shrink: 0;
  accent-color: var(--accent);
  -webkit-appearance: none; appearance: none;
  height: 3px; background: var(--border); border-radius: 2px; cursor: pointer;
}
.size-label {
  font-size: 0.62rem; color: var(--text3);
  min-width: 28px; flex-shrink: 0;
}

/* Action buttons */
.action-btn {
  height: 28px; padding: 0 10px;
  background: none; border: 1px solid var(--border);
  color: var(--text2); font-family: var(--mono); font-size: 0.8rem;
  border-radius: var(--r); cursor: pointer; transition: 0.15s ease;
  flex-shrink: 0;
}
.action-btn:hover { border-color: var(--accent); color: var(--accent); }

.save-ind { font-size: 0.62rem; color: var(--green); min-width: 60px; flex-shrink: 0; }

/* ── Canvas ── */
canvas {
  position: fixed;
  top: var(--toolbar); left: 0; right: 0; bottom: 0;
  display: block;
  cursor: crosshair;
  touch-action: none;
}

/* Transparent canvas background — checkerboard hint */
body::before {
  content: '';
  position: fixed;
  top: var(--toolbar); left: 0; right: 0; bottom: 0;
  background-image:
    linear-gradient(45deg, #111318 25%, transparent 25%),
    linear-gradient(-45deg, #111318 25%, transparent 25%),
    linear-gradient(45deg, transparent 75%, #111318 75%),
    linear-gradient(-45deg, transparent 75%, #111318 75%);
  background-size: 16px 16px;
  background-position: 0 0, 0 8px, 8px -8px, -8px 0px;
  z-index: -1;
}

/* ── Text overlay ── */
.text-overlay {
  position: fixed; z-index: 200;
  min-width: 200px;
}
.text-overlay.hidden { display: none; }

#text-input {
  background: rgba(10,11,14,0.92);
  border: 1px solid var(--accent); border-radius: var(--r);
  color: var(--text); font-family: var(--mono); font-size: 0.9rem;
  padding: 6px 10px; outline: none; resize: none;
  min-width: 200px; min-height: 36px;
  caret-color: var(--accent);
  line-height: 1.5;
}

/* ── LaTeX panel ── */
.latex-panel {
  position: fixed; bottom: 20px; right: 20px;
  width: 320px; z-index: 300;
  background: var(--bg2); border: 1px solid var(--border2);
  border-radius: 8px; overflow: hidden;
  box-shadow: 0 8px 32px rgba(0,0,0,0.5);
}
.latex-panel.hidden { display: none; }

.latex-panel-header {
  display: flex; justify-content: space-between; align-items: center;
  padding: 8px 12px; background: var(--surface);
  border-bottom: 1px solid var(--border);
  font-size: 0.7rem; letter-spacing: 1px; text-transform: uppercase; color: var(--text2);
}
.latex-panel-header button {
  background: none; border: none; color: var(--text3);
  cursor: pointer; font-size: 0.9rem; padding: 0 4px;
}
.latex-panel-header button:hover { color: var(--accent3); }

.latex-shortcuts {
  display: flex; flex-wrap: wrap; gap: 4px; padding: 8px 10px;
  border-bottom: 1px solid var(--border);
}
.latex-shortcuts button {
  background: var(--surface); border: 1px solid var(--border);
  color: var(--text2); font-family: var(--mono); font-size: 0.65rem;
  padding: 2px 8px; border-radius: var(--r); cursor: pointer; transition: 0.15s ease;
}
.latex-shortcuts button:hover { border-color: var(--accent2); color: var(--accent2); }

#latex-input {
  width: 100%; background: var(--bg);
  border: none; border-bottom: 1px solid var(--border);
  color: var(--text); font-family: var(--mono); font-size: 0.78rem;
  padding: 10px 12px; outline: none; resize: none;
  min-height: 60px; caret-color: var(--accent);
}

#latex-preview {
  padding: 12px; min-height: 60px;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem; color: var(--text);
  border-bottom: 1px solid var(--border);
}
#latex-preview .hint { color: var(--text3); font-size: 0.72rem; font-family: var(--mono); }
#latex-preview .err  { color: var(--accent3); font-size: 0.68rem; font-family: var(--mono); }

.latex-insert-btn {
  width: 100%; padding: 9px;
  background: rgba(0,229,255,0.08); border: none;
  border-top: 1px solid var(--border);
  color: var(--accent); font-family: var(--mono); font-size: 0.72rem;
  cursor: pointer; transition: 0.15s ease; letter-spacing: 0.5px;
}
.latex-insert-btn:hover { background: rgba(0,229,255,0.15); }

/* ── Utils ── */
.hidden { display: none !important; }