/* ================================================================
   PHASOR DIAGRAM — Main Application CSS
   Source: phasor_diagram.html <style> block 1 (lines 15–793)
   Font @import moved to <link> tags in HTML shell.
   ================================================================ */

:root {
  --bg: #f5f7fa;
  --bg2: #ffffff;
  --text: #1e293b;
  --text-dim: #64748b;
  --accent: #2563eb;
  --panel-bg: rgba(255,255,255,0.95);
  --border: rgba(148,163,184,0.3);
  --err: #dc2626;
  --set-border: rgba(37,99,235,0.18);
}

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

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'IBM Plex Mono', monospace;
  min-height: 100vh;
  padding-top: 80px !important;
  padding-bottom: 60px !important;
}

/* Fix header layout to prevent overlapping */
.header-container {
  min-height: 50px !important;
}
.header-container h1 {
  font-size: 11px !important;
  line-height: 1.3 !important;
}
.toolkit-title {
  font-size: 14px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  position: absolute !important;
  left: 50% !important;
  right: auto !important;
  width: auto !important;
  max-width: 400px !important;
  margin-left: -200px !important;
}
.header-left {
  max-width: 35% !important;
  z-index: 1 !important;
}
.header-right {
  z-index: 1 !important;
}

.page-header {
  text-align: center;
  padding: 20px 20px 6px;
}
.page-header h1 {
  font-family: 'Source Serif 4', serif;
  font-size: 1.45rem;
  font-weight: 700;
  color: var(--accent);
}
.page-header p {
  font-size: 0.74rem;
  color: var(--text-dim);
  margin-top: 4px;
  max-width: 860px;
  margin-left: auto; margin-right: auto;
  line-height: 1.5;
}

/* Top toolbar */
.top-bar {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 10px;
  padding: 8px 20px 14px;
  flex-wrap: wrap;
}
.top-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 6px 16px;
  border: 1px solid var(--accent);
  border-radius: 5px;
  background: var(--accent);
  color: #fff;
  cursor: pointer;
  transition: all 0.15s;
}
.top-btn:hover { background: #1d4ed8; }
.top-btn.secondary {
  background: transparent;
  color: var(--accent);
}
.top-btn.secondary:hover {
  background: rgba(37,99,235,0.06);
}

/* Set container */
.set-container {
  max-width: 1160px;
  margin: 0 auto 20px;
  border: 2px solid var(--set-border);
  border-radius: 12px;
  background: var(--bg2);
  overflow: hidden;
  transition: border-color 0.2s;
  box-shadow: 0 2px 12px rgba(37,99,235,0.06);
}
.set-container:hover { border-color: rgba(37,99,235,0.35); }

.set-header {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 16px;
  background: linear-gradient(135deg, rgba(37,99,235,0.04), rgba(37,99,235,0.01));
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.set-title-input {
  font-family: 'Source Serif 4', serif;
  font-size: 1rem;
  font-weight: 600;
  color: var(--accent);
  background: transparent;
  border: 1px solid transparent;
  border-radius: 4px;
  padding: 2px 8px;
  outline: none;
  min-width: 140px;
  max-width: 300px;
  transition: border-color 0.15s;
}
.set-title-input:hover { border-color: var(--border); }
.set-title-input:focus { border-color: var(--accent); background: #fff; }

.set-badge {
  font-size: 0.58rem;
  color: var(--text-dim);
  background: rgba(148,163,184,0.12);
  padding: 2px 8px;
  border-radius: 10px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}
.set-actions {
  margin-left: auto;
  display: flex;
  gap: 6px;
  align-items: center;
}
.set-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.62rem;
  padding: 4px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: transparent;
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.set-btn:hover { color: var(--accent); border-color: var(--accent); }
.set-btn.danger:hover { color: var(--err); border-color: var(--err); }

.set-body {
  display: flex;
  justify-content: center;
  align-items: flex-start;
  gap: 16px;
  padding: 14px 16px;
  flex-wrap: wrap;
}

/* Canvas and left column */
.left-col {
  display: flex;
  flex-direction: column;
  gap: 10px;
  align-items: center;
}
canvas.phasor-canvas {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 8px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}
.triple-canvas-wrap {
  display: none;
  gap: 4px;
  width: 580px;
}
.triple-canvas-wrap.active {
  display: flex;
}
.triple-canvas-wrap canvas {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: 6px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  flex: 1;
}
.view-toggle {
  display: flex;
  gap: 4px;
  margin-bottom: 6px;
  width: 580px;
}
.view-toggle button {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.65rem;
  font-weight: 500;
  padding: 3px 10px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg2);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
}
.view-toggle button.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}
.view-toggle button:hover:not(.active) {
  border-color: var(--accent);
  color: var(--accent);
}
.anim-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  width: 580px;
  padding: 0 2px;
}
.anim-btn {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  font-weight: 600;
  padding: 5px 14px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg2);
  color: var(--text-dim);
  cursor: pointer;
  transition: all 0.15s;
  white-space: nowrap;
}
.anim-btn.running { background: var(--accent); color: #fff; border-color: var(--accent); }
.anim-btn:hover { border-color: var(--accent); }
.anim-speed {
  display: flex; align-items: center; gap: 4px; flex: 1;
}
.anim-speed label { font-size: 0.62rem; color: var(--text-dim); white-space: nowrap; }
.anim-speed input[type="range"] {
  flex: 1; height: 18px; -webkit-appearance: none; appearance: none; background: transparent; cursor: pointer;
}
.anim-speed input[type="range"]::-webkit-slider-track {
  height: 3px; background: var(--border); border-radius: 2px;
}
.anim-speed input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); border: 1.5px solid #fff;
  box-shadow: 0 0 2px rgba(0,0,0,0.15); margin-top: -4.5px;
}
.anim-speed input[type="range"]::-moz-range-track {
  height: 3px; background: var(--border); border-radius: 2px;
}
.anim-speed input[type="range"]::-moz-range-thumb {
  appearance: none; width: 12px; height: 12px; border-radius: 50%;
  background: var(--accent); border: 1.5px solid #fff;
  box-shadow: 0 0 2px rgba(0,0,0,0.15);
}
.anim-speed-val {
  font-size: 0.62rem; color: var(--text); font-variant-numeric: tabular-nums; width: 46px; text-align: right;
}

.scope-container { width: 580px; display: flex; flex-direction: column; gap: 10px; }
.scope-section { width: 580px; }
.scope-header {
  display: flex; align-items: center; justify-content: space-between; margin-bottom: 6px;
}
.scope-header .section-label { margin: 0; }
.scope-traces { display: flex; flex-wrap: wrap; gap: 4px 10px; }
.scope-trace {
  display: flex; align-items: center; gap: 4px; cursor: pointer;
  font-size: 0.65rem; color: var(--text-dim); user-select: none;
}
.scope-trace input[type="checkbox"] {
  accent-color: var(--accent); width: 13px; height: 13px; cursor: pointer;
}
.scope-trace .trace-swatch { width: 12px; height: 3px; border-radius: 2px; }
canvas.scope-canvas {
  background: var(--bg2); border: 1px solid var(--border);
  border-radius: 8px; box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

/* Panel (equations side) */
.panel {
  background: var(--panel-bg);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px;
  width: 440px;
  backdrop-filter: blur(12px);
}
.panel h3 {
  font-family: 'Source Serif 4', serif;
  font-size: 0.92rem;
  color: var(--accent);
  margin-bottom: 8px;
  font-weight: 600;
}
.section-label {
  font-size: 0.63rem; color: var(--accent); text-transform: uppercase;
  letter-spacing: 0.1em; margin-bottom: 6px; margin-top: 10px;
}

/* Line-numbered equation editor */
.eq-editor-wrap {
  position: relative;
  width: 100%;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg);
  overflow: hidden;
  display: flex;
  transition: border-color 0.15s, box-shadow 0.15s;
}
.eq-editor-wrap.focused {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(37,99,235,0.12);
}
.eq-fullscreen-overlay {
  display: none;
  position: fixed;
  top: 0; left: 0;
  width: 100vw; height: 100vh;
  z-index: 99999;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(3px);
  align-items: center;
  justify-content: center;
  padding: 24px;
  box-sizing: border-box;
}
.eq-fullscreen-overlay.active {
  display: flex;
}
.eq-fullscreen-modal {
  width: 100%;
  max-width: 900px;
  height: 100%;
  max-height: calc(100vh - 48px);
  background: var(--bg2);
  border-radius: 12px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,0.35);
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.eq-fullscreen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg);
  flex-shrink: 0;
}
.eq-fullscreen-header span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text);
}
.eq-fullscreen-close {
  width: 30px; height: 30px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg2);
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.15s;
}
.eq-fullscreen-close:hover {
  border-color: var(--err);
  color: var(--err);
  background: rgba(220,38,38,0.06);
}
.eq-fullscreen-body {
  flex: 1;
  display: flex;
  overflow: hidden;
}
.eq-fullscreen-body .eq-line-numbers {
  width: 52px;
  font-size: 0.88rem;
  padding: 14px 0;
  overflow-y: auto;
  flex-shrink: 0;
  background: rgba(148,163,184,0.06);
  border-right: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  line-height: 1.6;
  color: rgba(100,116,139,0.45);
  text-align: right;
  user-select: none;
  pointer-events: none;
}
.eq-fullscreen-body .eq-line-numbers div {
  padding-right: 12px;
  height: 1.6em;
}
.eq-fullscreen-body .eq-line-numbers div.has-error {
  color: var(--err);
  font-weight: 600;
  background: rgba(220,38,38,0.06);
}
.eq-fullscreen-body textarea {
  flex: 1;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.92rem;
  line-height: 1.6;
  padding: 14px 20px;
  border: none;
  background: transparent;
  color: var(--text);
  resize: none;
  outline: none;
  tab-size: 2;
  overflow-y: auto;
}
.eq-expand-btn {
  position: absolute;
  top: 4px; right: 4px;
  width: 26px; height: 26px;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg2);
  color: var(--text-dim);
  font-size: 14px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all 0.15s;
  line-height: 1;
}
.eq-expand-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.canvas-expand-btn {
  position: absolute;
  top: 6px; right: 6px;
  width: 24px; height: 24px;
  border: 1px solid rgba(148,163,184,0.25);
  border-radius: 4px;
  background: rgba(255,255,255,0.85);
  color: var(--text-dim);
  font-size: 13px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: all 0.15s;
  line-height: 1;
  opacity: 0.6;
}
.canvas-expand-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: rgba(255,255,255,0.95);
  opacity: 1;
}
.canvas-wrap {
  position: relative;
  display: inline-block;
}
.scope-section {
  position: relative;
}

.canvas-fullscreen-overlay {
  position: fixed; inset: 0;
  background: rgba(15,23,42,0.7);
  backdrop-filter: blur(6px);
  z-index: 2000;
  display: none;
  align-items: center;
  justify-content: center;
}
.canvas-fullscreen-overlay.active {
  display: flex;
}
.canvas-fullscreen-modal {
  background: var(--bg);
  border-radius: 14px;
  box-shadow: 0 25px 50px rgba(0,0,0,0.3);
  width: 92vw; height: 88vh;
  display: flex;
  flex-direction: column;
  overflow: hidden;
}
.canvas-fullscreen-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
}
.canvas-fullscreen-header span {
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--text);
}
.canvas-fullscreen-close {
  width: 32px; height: 32px;
  border: 1px solid var(--border);
  border-radius: 6px;
  background: var(--bg2);
  color: var(--text-dim);
  font-size: 16px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}
.canvas-fullscreen-close:hover {
  background: rgba(220,38,38,0.08);
  border-color: rgba(220,38,38,0.3);
  color: #dc2626;
}
.canvas-fullscreen-body {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 12px;
  overflow: hidden;
}
.canvas-fullscreen-body canvas {
  display: block;
}
.canvas-fullscreen-controls {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 8px 16px;
  border-bottom: 1px solid var(--border);
  flex-shrink: 0;
  flex-wrap: wrap;
  background: var(--bg2);
}
.cvs-fs-anim {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.cvs-fs-anim-btn {
  padding: 4px 12px;
  border: 1px solid var(--border);
  border-radius: 5px;
  background: var(--bg);
  color: var(--text);
  font-size: 0.72rem;
  font-weight: 600;
  cursor: pointer;
}
.cvs-fs-anim-btn:hover { border-color: var(--accent); color: var(--accent); }
.cvs-fs-anim-btn.active { background: var(--accent); color: #fff; border-color: var(--accent); }
.cvs-fs-speed {
  display: flex;
  align-items: center;
  gap: 4px;
  font-size: 0.68rem;
  color: var(--text-dim);
}
.cvs-fs-speed input[type="range"] { width: 70px; }
.cvs-fs-traces {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
  flex: 1;
}
.cvs-fs-trace {
  display: flex;
  align-items: center;
  gap: 3px;
  font-size: 0.68rem;
  font-family: 'IBM Plex Mono', monospace;
  cursor: pointer;
  user-select: none;
}
.cvs-fs-trace input[type="checkbox"] { margin: 0; width: 13px; height: 13px; cursor: pointer; }
.cvs-fs-trace-swatch {
  width: 10px; height: 10px;
  border-radius: 2px;
  display: inline-block;
}
.eq-editor-wrap.fullscreen .eq-expand-btn {
  top: 12px; right: 16px;
  width: 36px; height: 36px;
  font-size: 18px;
  background: var(--bg);
}
.eq-line-numbers {
  width: 32px;
  flex-shrink: 0;
  padding: 8px 0;
  background: rgba(148,163,184,0.06);
  border-right: 1px solid var(--border);
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.72rem;
  line-height: 1.6;
  color: rgba(100,116,139,0.45);
  text-align: right;
  user-select: none;
  overflow: hidden;
  pointer-events: none;
}
.eq-line-numbers div {
  padding-right: 6px;
  height: 1.6em;
}
.eq-line-numbers div.has-error {
  color: var(--err);
  font-weight: 600;
  background: rgba(220,38,38,0.06);
}
.eq-editor {
  flex: 1;
  min-height: 120px;
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.76rem;
  line-height: 1.6;
  padding: 8px 10px;
  border: none;
  border-radius: 0;
  background: transparent;
  color: var(--text);
  resize: vertical;
  outline: none;
  tab-size: 2;
  overflow-y: auto;
}

.error-msg { font-size: 0.7rem; color: var(--err); margin-top: 4px; min-height: 1em; line-height: 1.4; }

.preset-row { display: flex; gap: 5px; flex-wrap: wrap; margin-top: 8px; }
.preset-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.60rem;
  padding: 3px 7px; border: 1px solid var(--border); border-radius: 4px;
  background: transparent; color: var(--text-dim); cursor: pointer; transition: all 0.15s;
}
.preset-btn:hover { background: rgba(37,99,235,0.06); color: var(--accent); border-color: var(--accent); }

.toggle-row { display: flex; gap: 6px; margin-top: 8px; flex-wrap: wrap; }
.toggle-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.63rem;
  padding: 3px 7px; border: 1px solid var(--border); border-radius: 4px;
  background: transparent; color: var(--text-dim); cursor: pointer; transition: all 0.15s;
}
.toggle-btn.active { background: rgba(37,99,235,0.08); color: var(--accent); border-color: var(--accent); }

/* Adjustment sliders */
.adj-section { margin-top: 8px; border-top: 1px solid var(--border); padding-top: 8px; }
.adj-header { display: flex; justify-content: space-between; align-items: center; cursor: pointer; user-select: none; }
.adj-header:hover .section-label { color: var(--accent); }
.adj-reset-btn {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.62rem;
  padding: 3px 10px; border: 1px solid var(--border); border-radius: 4px;
  background: transparent; color: var(--text-dim); cursor: pointer;
}
.adj-reset-btn:hover { color: var(--err); border-color: var(--err); }
.adj-list { margin-top: 6px; }
.adj-var {
  margin-bottom: 6px; padding: 6px 8px; border-radius: 6px;
  background: var(--bg); border: 1px solid transparent; transition: border-color 0.15s;
}
.adj-var.modified { border-color: rgba(37,99,235,0.25); background: rgba(37,99,235,0.02); }
.adj-var-header { display: flex; align-items: center; gap: 8px; margin-bottom: 4px; }
.adj-var-name { font-size: 0.76rem; font-weight: 600; min-width: 0; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.adj-var-reset {
  font-size: 0.6rem; color: var(--text-dim); cursor: pointer; margin-left: auto;
  flex-shrink: 0; opacity: 0; transition: opacity 0.15s; padding: 1px 6px;
  border: 1px solid transparent; border-radius: 3px;
}
.adj-var.modified .adj-var-reset { opacity: 1; }
.adj-var-reset:hover { color: var(--err); border-color: var(--err); }
.adj-row { display: flex; align-items: center; gap: 6px; margin-bottom: 3px; }
.adj-row label { font-size: 0.65rem; color: var(--text-dim); width: 20px; flex-shrink: 0; text-align: right; }
.adj-row input[type="range"] {
  flex: 1; height: 20px; -webkit-appearance: none; appearance: none; background: transparent; cursor: pointer;
}
.adj-row input[type="range"]::-webkit-slider-track { height: 4px; background: var(--border); border-radius: 2px; }
.adj-row input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18); margin-top: -5px;
}
.adj-row input[type="range"]::-moz-range-track { height: 4px; background: var(--border); border-radius: 2px; }
.adj-row input[type="range"]::-moz-range-thumb {
  appearance: none; width: 14px; height: 14px; border-radius: 50%;
  background: var(--accent); border: 2px solid #fff;
  box-shadow: 0 1px 3px rgba(0,0,0,0.18);
}
.adj-val {
  font-size: 0.64rem; color: var(--text); width: 46px; text-align: right;
  flex-shrink: 0; font-variant-numeric: tabular-nums; font-weight: 500;
}

.var-swatch { display: inline-block; width: 14px; height: 3px; border-radius: 2px; margin-right: 6px; vertical-align: middle; }
.var-name { font-weight: 600; }

.vars-table { width: 100%; margin-top: 8px; border-collapse: collapse; font-size: 0.68rem; }
.vars-table th {
  text-align: left; padding: 3px 6px; color: var(--text-dim); font-weight: 500;
  border-bottom: 1px solid var(--border); font-size: 0.61rem;
  text-transform: uppercase; letter-spacing: 0.06em;
}
.vars-table td {
  padding: 2px 6px; border-bottom: 1px solid rgba(148,163,184,0.12); vertical-align: middle;
}

.help-section { margin-top: 10px; border-top: 1px solid var(--border); padding-top: 8px; }
.help-section h4 { font-size: 0.63rem; color: var(--text-dim); text-transform: uppercase; letter-spacing: 0.08em; margin-bottom: 4px; }
.help-section p, .help-section code { font-size: 0.66rem; line-height: 1.5; color: var(--text-dim); }
.help-section code { background: rgba(37,99,235,0.06); padding: 1px 4px; border-radius: 3px; color: var(--text); }

/* Cross-set reference indicator */
.xref-badge {
  font-size: 0.55rem;
  color: #7c3aed;
  background: rgba(124,58,237,0.08);
  padding: 1px 5px;
  border-radius: 8px;
  margin-left: 4px;
  letter-spacing: 0.03em;
}

/* Collapsed state */
.set-container.collapsed .set-body { display: none; }
.set-container.collapsed { background: var(--bg); }

/* Instructions */
.instructions {
  max-width: 1160px; margin: 20px auto 32px; padding: 20px 28px;
  background: var(--bg2); border: 1px solid var(--border); border-radius: 8px;
  font-size: 0.74rem; line-height: 1.65; color: var(--text);
}
.instructions h2 {
  font-family: 'Source Serif 4', serif; font-size: 1.05rem;
  font-weight: 700; color: var(--accent); margin-bottom: 10px;
}
.instructions h3 {
  font-family: 'Source Serif 4', serif; font-size: 0.86rem;
  font-weight: 600; color: var(--accent); margin-top: 14px; margin-bottom: 4px;
}
.instructions p { margin-bottom: 6px; }
.instructions code { background: var(--bg); padding: 1px 5px; border-radius: 3px; font-size: 0.71rem; }