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

/* ===== Shared / theme-independent tokens ================================ */
/* All color tokens reference phaselab tokens.css — no raw hsl() values.  */
:root {
  --accent:  var(--blue-400);   /* interactive blue — dark-theme default  */
  --accent2: var(--gold-500);   /* bright gold — chart / canvas           */
  --red:     var(--red-500);    /* laser beam                             */
  --gold:    var(--gold-600);   /* physical Au layer                      */
  --radius:  8px;
}

/* ===== Dark theme — phaselab deep-blue palette ========================== */
[data-theme="dark"] {
  --bg:              var(--blue-900);      /* hsl(204, 72%, 18%) */
  --panel:           var(--bg-deep);       /* = var(--blue-800)  */
  --border:          var(--blue-700);      /* hsl(204, 70%, 31%) */
  --text:            var(--text-on-deep);  /* #ffffff            */
  --text-dim:        var(--blue-400);      /* hsl(204, 68%, 55%) */
  --input-bg:        var(--blue-900);
  --input-text:      var(--text-on-deep); /* white text on dark input bg */
  /* obs-bar / canvas card */
  --obs-bar-bg:      transparent;
  --obs-bar-border:  var(--blue-700);
  --obs-text:        var(--text-on-deep);
  --obs-dim:         var(--blue-400);
  --obs-sep-color:   var(--blue-700);
  --canvas-bg:       transparent;
}

/* ===== Light theme — phaselab tokens.css palette ======================== */
[data-theme="light"] {
  --bg:              var(--grey-50);       /* hsl(210, 15%, 98%) */
  --panel:           var(--bg-deep);       /* = var(--blue-800), dark panel */
  --border:          var(--blue-700);      /* border on dark panel */
  --text:            var(--text-on-deep);  /* #ffffff — white on dark panel */
  --text-dim:        hsla(0, 0%, 100%, 0.75);  /* dimmed white */
  --input-bg:        #fff;
  --input-text:      var(--text-heading);  /* dark text inside white inputs */
  --accent:          var(--gold-550);      /* hsl(44, 90%, 46%) — gold replaces blue */
  /* obs-bar / canvas card stay dark so the glow effect reads */
  --obs-bar-bg:      var(--blue-800);      /* hsl(204, 70%, 27%) */
  --obs-bar-border:  var(--blue-900);      /* hsl(204, 72%, 18%) */
  --obs-text:        var(--text-on-deep);  /* #ffffff */
  --obs-dim:         hsla(0, 0%, 100%, 0.60);
  --obs-sep-color:   hsla(0, 0%, 100%, 0.25);
  --canvas-bg:       var(--blue-600);      /* hsl(204, 73%, 34%) */
}

html, body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Segoe UI', system-ui, sans-serif;
  font-size: 14px;
}

/* ===== App shell ========================================================= */
#app {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 10px 20px 20px;
  max-width: 1200px;
  margin: 0 auto;
}

/* ===== Obs-bar title ===================================================== */
#obs-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--accent);
  letter-spacing: 0.5px;
  margin-right: 2px;
}

/* ===== Content row (left panel + main column) =========================== */
#content-row {
  display: flex;
  gap: 12px;
  align-items: flex-start;
}

/* ===== Left panel ======================================================== */
#left-panel {
  width: 188px;
  flex-shrink: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ===== Main column ======================================================= */
#main-col {
  flex: 1;
  min-width: 0;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

/* ===== Main animation box (obs bar + canvas) ============================ */
#main-anim-box {
  background: var(--panel);
  border: 1px solid var(--obs-bar-border);
  border-radius: var(--radius);
  overflow: hidden;
}

/* ===== Observables bar ================================================== */
#obs-bar {
  display: flex;
  align-items: center;
  padding: 5px 14px;
  gap: 8px;
  background: var(--obs-bar-bg);
  border-bottom: 1px solid var(--obs-bar-border);
  color: var(--obs-text);
  font-size: 12px;
}

/* scrollable obs items — button stays pinned outside */
#obs-items {
  display: flex;
  align-items: center;
  gap: 4px;
  flex: 1;
  min-width: 0;
  overflow-x: auto;
  white-space: nowrap;
}

.obs-item {
  display: inline-flex;
  align-items: baseline;
  gap: 3px;
}

.obs-lbl {
  font-size: 10px;
  color: var(--obs-dim);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.obs-val {
  font-weight: 700;
  font-variant-numeric: tabular-nums;
  font-size: 13px;
}

.obs-unit {
  font-size: 10px;
  color: var(--obs-dim);
}

.obs-sep {
  color: var(--obs-sep-color);
  margin: 0 8px;
  font-size: 14px;
}

.obs-theta { color: var(--accent); }
.rv-rp     { color: var(--blue-400); }   /* --blue-400 */
.rv-rs     { color: var(--red-400); }    /* --red-400  */
.rv-abs    { color: var(--gold-500); }   /* --gold-500 */
.rv-field  { color: var(--gold-700); }   /* --gold-700 — darker gold, distinct from abs */

/* Light theme: all obs values use gold accent (overrides the per-value colours above) */
[data-theme="light"] .obs-val { color: var(--accent); }

/* ===== Theme toggle button ============================================== */
#theme-toggle {
  flex-shrink: 0;
  background: none;
  border: 1px solid var(--obs-sep-color);
  border-radius: 4px;
  color: var(--obs-dim);
  font-size: 13px;
  line-height: 1;
  padding: 2px 6px;
  cursor: pointer;
  transition: opacity .15s;
}
#theme-toggle:hover { opacity: .75; }

/* ===== Canvas ============================================================ */
#canvas-wrap {
  cursor: crosshair;
  background: var(--canvas-bg);
}

#diagram {
  display: block;
  width: 100%;
  height: auto;
}

/* ===== Panel boxes (shared) ============================================== */
.panel-box {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 11px 13px;
}

.panel-box h2 {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 9px;
}

/* ===== Form controls ===================================================== */
.field {
  display: flex;
  flex-direction: column;
  gap: 3px;
  margin-bottom: 7px;
}

.field:last-child { margin-bottom: 0; }

.field label {
  font-size: 11px;
  color: var(--text-dim);
}

.field input[type="range"] {
  width: 100%;
  accent-color: var(--accent);
  cursor: pointer;
}

.field input[type="number"] {
  width: 100%;
  background: var(--input-bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--input-text);
  padding: 4px 7px;
  font-size: 12px;
}

.field input[type="number"]:focus {
  outline: none;
  border-color: var(--accent);
}

.angle-big {
  font-size: 26px;
  font-weight: 700;
  color: var(--accent);
  text-align: center;
  margin: 2px 0 7px;
  font-variant-numeric: tabular-nums;
}

/* ===== Buttons =========================================================== */
.btn {
  width: 100%;
  padding: 7px;
  border: none;
  border-radius: 5px;
  font-size: 12px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .15s;
}
.btn:hover   { opacity: .85; }
.btn:active  { opacity: .70; }
.btn:disabled { opacity: .35; cursor: default; }

.btn-scan { background: var(--accent); color: var(--text-heading); }
.btn-stop { background: var(--red);    color: var(--text-on-deep); display: none; }

/* ===== Scan status ======================================================= */
#scan-status {
  font-size: 10px;
  color: var(--text-dim);
  margin-top: 5px;
  min-height: 13px;
}

/* ===== Charts panel ====================================================== */
#charts-panel {
  background: var(--panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 10px 14px 12px;
}

#charts-panel h2 {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--text-dim);
  margin-bottom: 8px;
}

#charts {
  width: 100%;
  height: 210px;
}