/* Oscilloscope display -- Tektronix 465 inspired
 * Tan/champagne panel, recessed CRT, teal phosphor
 * Designed for mcltspice docs hero section */

/* ── Outer chassis ───────────────────────────────────────── */
.scope-frame {
  --scope-teal: #2dd4bf;
  --scope-teal-dim: rgba(45, 212, 191, 0.12);
  --scope-teal-glow: rgba(45, 212, 191, 0.18);
  --scope-panel: #b5a48a;
  --scope-panel-light: #c7b89e;
  --scope-panel-dark: #9e8f78;
  --scope-crt-bg: #0a0a0a;
  --scope-label: #3b3428;
  --scope-knob: #2a2a2d;
  --scope-knob-ring: #1e1e20;
  --scope-section-line: rgba(59, 52, 40, 0.25);

  position: relative;
  background:
    /* subtle metallic grain */
    url("data:image/svg+xml,%3Csvg width='4' height='4' xmlns='http://www.w3.org/2000/svg'%3E%3Crect width='1' height='1' x='0' y='0' fill='rgba(0,0,0,0.03)'/%3E%3Crect width='1' height='1' x='2' y='2' fill='rgba(255,255,255,0.02)'/%3E%3C/svg%3E"),
    linear-gradient(175deg, var(--scope-panel-light), var(--scope-panel), var(--scope-panel-dark));
  border-radius: 6px;
  padding: 0;
  box-shadow:
    0 10px 30px rgba(0, 0, 0, 0.55),
    0 2px 6px rgba(0, 0, 0, 0.3),
    inset 0 1px 0 rgba(255, 255, 255, 0.15),
    inset 0 -1px 0 rgba(0, 0, 0, 0.1);
  max-width: 340px;
  width: 100%;
  margin: 0 auto;
  overflow: hidden;
}

/* ── Top brand bar ───────────────────────────────────────── */
.scope-brand {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  padding: 8px 14px 6px;
  border-bottom: 1px solid var(--scope-section-line);
}

.scope-brand-name {
  font-family: 'Georgia', 'Times New Roman', serif;
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--scope-label);
  opacity: 0.75;
}

.scope-brand-model {
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.55rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--scope-label);
  opacity: 0.55;
}

/* ── CRT bay (recessed dark area) ────────────────────────── */
.scope-crt-bay {
  margin: 10px 12px 0;
  background: #1a1816;
  border-radius: 4px;
  padding: 6px;
  box-shadow:
    inset 0 2px 6px rgba(0, 0, 0, 0.5),
    inset 0 0 0 1px rgba(0, 0, 0, 0.2);
}

/* ── CRT screen ──────────────────────────────────────────── */
.scope-screen {
  position: relative;
  background: var(--scope-crt-bg);
  border-radius: 3px;
  overflow: hidden;
  aspect-ratio: 1;
  box-shadow:
    0 0 15px var(--scope-teal-glow),
    inset 0 1px 4px rgba(0, 0, 0, 0.4);
}

/* ── Canvas ──────────────────────────────────────────────── */
.scope-canvas {
  display: block;
  width: 100%;
  height: 100%;
}

/* ── Graticule overlay (8x10 grid, like the 465) ─────────── */
.scope-graticule {
  position: absolute;
  inset: 0;
  pointer-events: none;
  /* 10 horizontal, 8 vertical — classic Tek grid */
  background-image:
    repeating-linear-gradient(
      90deg,
      transparent,
      transparent calc(12.5% - 0.5px),
      rgba(45, 212, 191, 0.07) calc(12.5% - 0.5px),
      rgba(45, 212, 191, 0.07) calc(12.5% + 0.5px),
      transparent calc(12.5% + 0.5px)
    ),
    repeating-linear-gradient(
      0deg,
      transparent,
      transparent calc(12.5% - 0.5px),
      rgba(45, 212, 191, 0.07) calc(12.5% - 0.5px),
      rgba(45, 212, 191, 0.07) calc(12.5% + 0.5px),
      transparent calc(12.5% + 0.5px)
    );
}

/* Center crosshair tick marks */
.scope-graticule::before,
.scope-graticule::after {
  content: '';
  position: absolute;
}

.scope-graticule::before {
  /* horizontal center tick */
  top: 50%;
  left: calc(50% - 8px);
  width: 16px;
  height: 1px;
  background: rgba(45, 212, 191, 0.18);
}

.scope-graticule::after {
  /* vertical center tick */
  left: 50%;
  top: calc(50% - 8px);
  width: 1px;
  height: 16px;
  background: rgba(45, 212, 191, 0.18);
}

/* ── Scanline overlay ────────────────────────────────────── */
.scope-scanlines {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: repeating-linear-gradient(
    0deg,
    transparent,
    transparent 2px,
    rgba(0, 0, 0, 0.04) 2px,
    rgba(0, 0, 0, 0.04) 4px
  );
  mix-blend-mode: multiply;
}

/* ── Control panel area ──────────────────────────────────── */
.scope-panel {
  padding: 8px 12px 6px;
  border-top: 1px solid var(--scope-section-line);
  margin-top: 10px;
}

.scope-controls-row {
  display: flex;
  align-items: flex-start;
  gap: 2px;
}

/* ── Control section (labeled group) ─────────────────────── */
.scope-section {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: 4px 2px;
  position: relative;
}

/* Section divider lines */
.scope-section + .scope-section::before {
  content: '';
  position: absolute;
  left: -1px;
  top: 0;
  bottom: 0;
  width: 1px;
  background: var(--scope-section-line);
}

.scope-section-label {
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.45rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--scope-label);
  opacity: 0.6;
  line-height: 1;
}

/* ── Rotary knob ─────────────────────────────────────────── */
.scope-knob {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: radial-gradient(circle at 40% 35%, #3a3a3e, var(--scope-knob));
  border: 2px solid var(--scope-knob-ring);
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.35),
    inset 0 1px 1px rgba(255, 255, 255, 0.06);
  position: relative;
}

/* Knob indicator line */
.scope-knob::after {
  content: '';
  position: absolute;
  top: 3px;
  left: 50%;
  width: 1.5px;
  height: 7px;
  background: #d4d0c8;
  border-radius: 1px;
  transform: translateX(-50%);
}

.scope-knob-label {
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.4rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--scope-label);
  opacity: 0.5;
  line-height: 1;
}

/* ── Source knob (interactive) ───────────────────────────── */
/* Uses --knob-rotation custom prop so JS rotation composes with CSS scale */
.scope-source-knob {
  cursor: pointer;
  transition: transform 0.15s;
  transform: rotate(var(--knob-rotation, 0deg));
}

.scope-source-knob:hover {
  transform: rotate(var(--knob-rotation, 0deg)) scale(1.08);
}

.scope-source-knob:active {
  transform: rotate(var(--knob-rotation, 0deg)) scale(0.95);
}

.scope-source-knob:focus-visible {
  outline: 2px solid var(--scope-teal);
  outline-offset: 2px;
}

/* ── Signal name label ──────────────────────────────────── */
.scope-source-name {
  max-width: 60px;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  text-align: center;
}

/* ── Loading state overlay ──────────────────────────────── */
.scope-screen[data-loading="true"]::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(10, 10, 10, 0.7);
  z-index: 5;
  animation: scope-loading-pulse 1.2s ease-in-out infinite;
}

@keyframes scope-loading-pulse {
  0%, 100% { opacity: 0.5; }
  50% { opacity: 0.9; }
}

/* ── Power toggle ────────────────────────────────────────── */
.scope-toggle {
  appearance: none;
  background: var(--scope-knob);
  border: 2px solid var(--scope-knob-ring);
  border-radius: 6px;
  color: #8a8880;
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.55rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  padding: 5px 8px;
  cursor: pointer;
  transition: color 0.2s, box-shadow 0.2s;
  text-transform: uppercase;
  line-height: 1;
  box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.scope-toggle:hover {
  color: #c4c0b8;
}

.scope-toggle[data-active="true"] {
  color: var(--scope-teal);
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.3),
    0 0 6px var(--scope-teal-glow);
}

.scope-toggle:focus-visible {
  outline: 2px solid var(--scope-teal);
  outline-offset: 2px;
}

/* ── Power LED ───────────────────────────────────────────── */
.scope-led {
  width: 5px;
  height: 5px;
  border-radius: 50%;
  background: #3a3632;
  border: 1px solid rgba(0, 0, 0, 0.3);
  transition: background 0.3s, box-shadow 0.3s;
}

.scope-led[data-on="true"] {
  background: var(--scope-teal);
  box-shadow: 0 0 6px var(--scope-teal-glow);
}

/* ── Attribution bar ─────────────────────────────────────── */
.scope-attribution-bar {
  padding: 5px 14px 7px;
  border-top: 1px solid var(--scope-section-line);
}

.scope-attribution {
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.45rem;
  color: var(--scope-panel-dark);
  line-height: 1.4;
  text-align: center;
}

.scope-attribution a {
  color: var(--scope-label);
  text-decoration: none;
  transition: color 0.15s;
}

.scope-attribution a:hover {
  color: #1a1610;
}

/* ── Idle state ──────────────────────────────────────────── */
.scope-screen[data-idle="true"] .scope-canvas {
  opacity: 0.6;
}

/* ── Reduced motion ──────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  .scope-scanlines {
    display: none;
  }
}

/* ── Responsive ──────────────────────────────────────────── */
@media (max-width: 50rem) {
  .scope-frame {
    max-width: 280px;
  }

  .scope-knob {
    width: 24px;
    height: 24px;
  }

  .scope-knob::after {
    height: 5px;
  }
}

/* ── Skin picker (model name → clickable) ──────────────── */
.scope-brand-right {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 1px;
}

button.scope-brand-model {
  appearance: none;
  background: none;
  border: none;
  padding: 0;
  cursor: pointer;
  line-height: inherit;
  transition: opacity 0.15s;
}

button.scope-brand-model:hover {
  opacity: 0.85;
}

button.scope-brand-model:focus-visible {
  outline: 2px solid var(--scope-teal);
  outline-offset: 2px;
  border-radius: 2px;
}

.scope-brand-sub {
  font-family: var(--sl-font-mono, ui-monospace, monospace);
  font-size: 0.4rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--scope-label);
  opacity: 0.4;
}

/* ── Tektronix Type 545A skin (1959) ─────────────────────── */
/* Vacuum-tube era: blue-green hammertone, cream silk-screen,
   Bakelite knobs, deeper CRT recess, ventilation holes        */

.scope-skin-545a {
  --scope-panel: #4a6e64;
  --scope-panel-light: #5a7e72;
  --scope-panel-dark: #3a5a50;
  --scope-label: #e0d8c8;
  --scope-knob: #1c1814;
  --scope-knob-ring: #141210;
  --scope-section-line: rgba(224, 216, 200, 0.15);
}

/* Hammertone texture — larger dimpled dots, irregular placement */
.scope-skin-545a {
  background:
    url("data:image/svg+xml,%3Csvg width='8' height='8' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='2' cy='2' r='1.2' fill='rgba(0,0,0,0.06)'/%3E%3Ccircle cx='6' cy='5' r='0.8' fill='rgba(255,255,255,0.04)'/%3E%3Ccircle cx='4' cy='7' r='1' fill='rgba(0,0,0,0.04)'/%3E%3Ccircle cx='7' cy='1' r='0.6' fill='rgba(255,255,255,0.03)'/%3E%3C/svg%3E"),
    linear-gradient(175deg, var(--scope-panel-light), var(--scope-panel), var(--scope-panel-dark));
}

/* Deeper CRT bay recess — tube-era instruments had heavier bezels */
.scope-skin-545a .scope-crt-bay {
  box-shadow:
    inset 0 3px 8px rgba(0, 0, 0, 0.6),
    inset 0 0 0 1px rgba(0, 0, 0, 0.3);
}

/* Larger Bakelite-era knobs */
.scope-skin-545a .scope-knob {
  width: 32px;
  height: 32px;
  background: radial-gradient(circle at 40% 35%, #2e2218, var(--scope-knob));
}

.scope-skin-545a .scope-knob::after {
  height: 8px;
  background: #c8b890;
}

/* Cream-on-green attribution */
.scope-skin-545a .scope-attribution {
  color: var(--scope-label);
  opacity: 0.6;
}

.scope-skin-545a .scope-attribution a {
  color: var(--scope-label);
}

.scope-skin-545a .scope-attribution a:hover {
  color: #fff;
}

/* ── Ventilation holes (545A only) ──────────────────────── */
.scope-vent-holes {
  display: none;
  justify-content: center;
  gap: 8px;
  padding: 6px 14px 8px;
}

.scope-vent-hole {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(0, 0, 0, 0.4) 40%, rgba(0, 0, 0, 0.15) 100%);
  box-shadow: inset 0 1px 2px rgba(0, 0, 0, 0.3);
}

.scope-skin-545a .scope-vent-holes {
  display: flex;
}

/* ── 545A responsive overrides ──────────────────────────── */
@media (max-width: 50rem) {
  .scope-skin-545a .scope-knob {
    width: 26px;
    height: 26px;
  }

  .scope-skin-545a .scope-knob::after {
    height: 6px;
  }

  .scope-vent-hole {
    width: 5px;
    height: 5px;
  }
}