:root {
  --escuela_trig-ruby: #9B111E;
  --escuela_trig-blue: #0000FF;
  --escuela_trig-violet: #4D088E;
  --escuela_trig-gold: #BDA838;
  --escuela_trig-space-0: #030218;
  --escuela_trig-space-1: #070321;
  --escuela_trig-space-2: #14063a;
  --escuela_trig-panel-0: rgba(13, 10, 36, 0.92);
  --escuela_trig-panel-1: rgba(6, 4, 22, 0.95);
  --escuela_trig-font-main: 'Merriweather', 'Helvetica Neue', Arial, sans-serif;
  --escuela_trig-font-mono: ui-monospace, 'Merriweather', 'SF Mono', Menlo, Consolas, 'Courier New', monospace;
}

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

html, body { min-height: 100%; }

.escuela_trig-body {
  font-family: var(--escuela_trig-font-main);
  color: var(--escuela_trig-gold);
  background:
    radial-gradient(1100px 720px at 78% -12%, var(--escuela_trig-space-2) 0%, rgba(20, 6, 58, 0) 60%),
    radial-gradient(900px 700px at 8% 110%, #1c0430 0%, rgba(28, 4, 48, 0) 55%),
    linear-gradient(160deg, var(--escuela_trig-space-1) 0%, var(--escuela_trig-space-0) 100%);
  background-attachment: fixed;
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
}

/* Faint page-level starfield (the canvas paints its own richer one) */
.escuela_trig-body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background-image:
    radial-gradient(1.4px 1.4px at 22% 18%, rgba(255, 255, 255, 0.9) 50%, transparent 51%),
    radial-gradient(1.1px 1.1px at 68% 9%, rgba(189, 168, 56, 0.8) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 84% 64%, rgba(160, 178, 255, 0.85) 50%, transparent 51%),
    radial-gradient(1px 1px at 12% 72%, rgba(255, 255, 255, 0.7) 50%, transparent 51%),
    radial-gradient(1.3px 1.3px at 42% 44%, rgba(255, 255, 255, 0.75) 50%, transparent 51%),
    radial-gradient(1px 1px at 92% 30%, rgba(189, 168, 56, 0.65) 50%, transparent 51%),
    radial-gradient(1.2px 1.2px at 56% 86%, rgba(160, 178, 255, 0.7) 50%, transparent 51%);
  background-size: 340px 340px, 280px 280px, 420px 420px, 300px 300px, 380px 380px, 260px 260px, 360px 360px;
  opacity: 0.55;
}

.escuela_trig-app {
  position: relative;
  z-index: 1;
  max-width: 1180px;
  margin: 0 auto;
  padding: 28px 20px 44px;
}

@keyframes escuela_trigRise {
  from { opacity: 0; transform: translateY(14px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ---------------- Header ---------------- */

.escuela_trig-header {
  position: relative;
  text-align: center;
  margin-bottom: 24px;
  padding-bottom: 18px;
  animation: escuela_trigRise 0.7s ease both;
}

.escuela_trig-header::after {
  content: '';
  position: absolute;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: 210px;
  height: 2px;
  border-radius: 2px;
  background: linear-gradient(90deg, transparent, var(--escuela_trig-ruby), var(--escuela_trig-blue), transparent);
  box-shadow: 0 0 12px rgba(77, 8, 142, 0.9);
}

.escuela_trig-title {
  margin-top: 14px;
  font-size: clamp(1.55rem, 3.4vw, 2.3rem);
  font-weight: 700;
  letter-spacing: 0.5px;
  color: var(--escuela_trig-gold);
  text-shadow: 0 0 22px rgba(189, 168, 56, 0.4), 0 0 60px rgba(77, 8, 142, 0.6);
}

.escuela_trig-subtitle {
  margin-top: 10px;
  font-size: 0.95rem;
  font-weight: 300;
  letter-spacing: 0.3px;
  color: var(--escuela_trig-gold);
}

/* ---------------- Layout ---------------- */

.escuela_trig-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.6fr) minmax(320px, 1fr);
  gap: 24px;
  align-items: start;
  animation: escuela_trigRise 0.8s 0.1s ease both;
}

/* Gradient-border shells (ruby → violet → blue) */
.escuela_trig-stage,
.escuela_trig-panel {
  border-radius: 20px;
  padding: 2px;
  background: linear-gradient(140deg, var(--escuela_trig-ruby) 0%, var(--escuela_trig-violet) 48%, var(--escuela_trig-blue) 100%);
  box-shadow: 0 0 34px rgba(155, 17, 30, 0.30), 0 0 54px rgba(0, 0, 255, 0.22), inset 0 0 10px rgba(0, 0, 0, 0.55);
}

.escuela_trig-stage-inner {
  position: relative;
  border-radius: 18px;
  overflow: hidden;
  background: radial-gradient(120% 120% at 50% 42%, #0d0d2c 0%, #060617 62%, #03030d 100%);
  width: 100%;
  max-width: min(100%, 80vh);
  margin: 0 auto;
  aspect-ratio: 1 / 1;
}

.escuela_trig-canvas {
  display: block;
  width: 100%;
  height: 100%;
  touch-action: none;
  cursor: default;
  user-select: none;
  -webkit-user-select: none;
}

.escuela_trig-stage-hint {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 10px;
  text-align: center;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.4px;
  color: var(--escuela_trig-gold);
  pointer-events: none;
  text-shadow: 0 0 8px rgba(0, 0, 0, 0.9);
}

/* ---------------- Panel ---------------- */

.escuela_trig-panel-body {
  border-radius: 18px;
  background: linear-gradient(165deg, var(--escuela_trig-panel-0), var(--escuela_trig-panel-1));
  padding: 18px 18px 16px;
  backdrop-filter: blur(6px);
  -webkit-backdrop-filter: blur(6px);
}

.escuela_trig-mode-toggle {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4px;
  padding: 4px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--escuela_trig-ruby), var(--escuela_trig-blue));
  box-shadow: 0 0 20px rgba(77, 8, 142, 0.55);
}

.escuela_trig-mode-btn {
  appearance: none;
  -webkit-appearance: none;
  border: 0;
  border-radius: 999px;
  padding: 10px 10px;
  cursor: pointer;
  font-family: var(--escuela_trig-font-main);
  font-size: 0.86rem;
  font-weight: 600;
  letter-spacing: 0.4px;
  color: var(--escuela_trig-gold);
  background: rgba(5, 3, 20, 0.88);
  transition: background 0.25s ease, box-shadow 0.25s ease, transform 0.12s ease;
}

.escuela_trig-mode-btn:hover { background: rgba(24, 10, 52, 0.92); }
.escuela_trig-mode-btn:active { transform: scale(0.985); }

.escuela_trig-mode-btn.escuela_trig-is-active {
  background: linear-gradient(135deg, rgba(155, 17, 30, 0.65), rgba(0, 0, 255, 0.65));
  box-shadow: inset 0 0 0 1px rgba(189, 168, 56, 0.55), 0 0 16px rgba(77, 8, 142, 0.8);
  text-shadow: 0 0 10px rgba(189, 168, 56, 0.6);
}

.escuela_trig-section { margin-top: 18px; }

.escuela_trig-section-title {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 2.2px;
  text-transform: uppercase;
  color: var(--escuela_trig-gold);
  margin-bottom: 12px;
}

.escuela_trig-section-title::after {
  content: '';
  flex: 1;
  height: 1.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, rgba(155, 17, 30, 0.85), rgba(0, 0, 255, 0.85), transparent);
}

.escuela_trig-is-hidden { display: none !important; }

/* ---------------- Fraction of π inputs ---------------- */

.escuela_trig-fraction-row {
  display: flex;
  align-items: center;
  gap: 16px;
}

.escuela_trig-fraction-stack {
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 6px;
  width: 86px;
}

.escuela_trig-fraction-input {
  width: 100%;
  text-align: center;
  font-family: var(--escuela_trig-font-mono);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--escuela_trig-gold);
  background: rgba(4, 2, 18, 0.85);
  border: 1px solid rgba(189, 168, 56, 0.55);
  border-radius: 10px;
  padding: 8px 4px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.escuela_trig-fraction-input:focus {
  border-color: var(--escuela_trig-gold);
  box-shadow: 0 0 14px rgba(189, 168, 56, 0.45), inset 0 0 8px rgba(189, 168, 56, 0.12);
}

.escuela_trig-fraction-divider {
  height: 2.5px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--escuela_trig-ruby), var(--escuela_trig-blue));
  box-shadow: 0 0 8px rgba(77, 8, 142, 0.8);
}

.escuela_trig-pi-glyph {
  font-family: var(--escuela_trig-font-mono);
  font-size: 1.9rem;
  font-weight: 700;
  line-height: 1;
  color: var(--escuela_trig-gold);
  text-shadow: 0 0 16px rgba(189, 168, 56, 0.55);
}

.escuela_trig-fraction-hint {
  flex: 1;
  font-size: 0.78rem;
  line-height: 1.5;
  color: var(--escuela_trig-gold);
}

.escuela_trig-fraction-input::-webkit-outer-spin-button,
.escuela_trig-fraction-input::-webkit-inner-spin-button,
.escuela_trig-number-input::-webkit-outer-spin-button,
.escuela_trig-number-input::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

.escuela_trig-fraction-input,
.escuela_trig-number-input {
  -moz-appearance: textfield;
  appearance: textfield;
}

.escuela_trig-input-invalid {
  border-color: rgba(255, 90, 110, 0.85) !important;
  box-shadow: 0 0 12px rgba(255, 60, 90, 0.4) !important;
}

/* ---------------- Quick-angle chips ---------------- */

.escuela_trig-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 7px;
  margin-top: 14px;
}

.escuela_trig-chip {
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--escuela_trig-gold);
  background: rgba(189, 168, 56, 0.07);
  border: 1px solid rgba(189, 168, 56, 0.45);
  border-radius: 999px;
  padding: 5px 10px;
  transition: background 0.2s ease, box-shadow 0.2s ease, transform 0.12s ease;
}

.escuela_trig-chip:hover {
  background: linear-gradient(135deg, var(--escuela_trig-ruby), var(--escuela_trig-blue));
  box-shadow: 0 0 14px rgba(77, 8, 142, 0.75);
  transform: translateY(-1px);
}

.escuela_trig-chip.escuela_trig-is-active {
  background: linear-gradient(135deg, rgba(155, 17, 30, 0.75), rgba(0, 0, 255, 0.75));
  border-color: rgba(189, 168, 56, 0.8);
  box-shadow: 0 0 12px rgba(189, 168, 56, 0.35);
}

/* ---------------- Angle readout ---------------- */

.escuela_trig-angle-readout {
  margin-top: 14px;
  padding: 11px 14px;
  border-radius: 12px;
  border: 1px solid rgba(189, 168, 56, 0.35);
  background: rgba(2, 1, 14, 0.7);
  font-family: var(--escuela_trig-font-mono);
  font-size: 1.02rem;
  color: var(--escuela_trig-gold);
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  gap: 6px;
  text-shadow: 0 0 12px rgba(189, 168, 56, 0.35);
}

.escuela_trig-angle-symbol,
.escuela_trig-angle-rad,
.escuela_trig-angle-deg { font-weight: 700; }

.escuela_trig-angle-rad { font-size: 1.14rem; }
.escuela_trig-angle-sep { padding: 0 2px; }

/* ---------------- Equation mode fields ---------------- */

.escuela_trig-field { display: block; margin-bottom: 14px; }

.escuela_trig-field-label {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  font-size: 0.8rem;
  letter-spacing: 0.6px;
  margin-bottom: 8px;
  color: var(--escuela_trig-gold);
}

.escuela_trig-field-label b {
  font-family: var(--escuela_trig-font-mono);
  font-weight: 700;
}

.escuela_trig-select {
  width: 100%;
  appearance: none;
  -webkit-appearance: none;
  cursor: pointer;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--escuela_trig-gold);
  background:
    rgba(4, 2, 18, 0.85)
    url("data:image/svg+xml,%3Csvg%20xmlns='http://www.w3.org/2000/svg'%20width='12'%20height='8'%3E%3Cpath%20d='M1%201l5%205%205-5'%20fill='none'%20stroke='%23BDA838'%20stroke-width='1.6'%20stroke-linecap='round'/%3E%3C/svg%3E")
    no-repeat right 12px center;
  border: 1px solid rgba(189, 168, 56, 0.55);
  border-radius: 10px;
  padding: 10px 34px 10px 12px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.escuela_trig-select:focus {
  border-color: var(--escuela_trig-gold);
  box-shadow: 0 0 14px rgba(189, 168, 56, 0.4);
}

.escuela_trig-select option {
  background: #0a0620;
  color: var(--escuela_trig-gold);
}

.escuela_trig-slider-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.escuela_trig-slider {
  flex: 1;
  appearance: none;
  -webkit-appearance: none;
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--escuela_trig-ruby), var(--escuela_trig-violet), var(--escuela_trig-blue));
  outline: none;
  box-shadow: 0 0 12px rgba(77, 8, 142, 0.6);
  cursor: pointer;
}

.escuela_trig-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 18px;
  height: 18px;
  border-radius: 50%;
  background: radial-gradient(circle at 34% 30%, #fff6cf 0%, var(--escuela_trig-gold) 55%, #6f611c 100%);
  border: 1px solid rgba(255, 244, 200, 0.8);
  box-shadow: 0 0 12px rgba(189, 168, 56, 0.95);
  cursor: pointer;
}

.escuela_trig-slider::-moz-range-thumb {
  width: 17px;
  height: 17px;
  border-radius: 50%;
  border: 1px solid rgba(255, 244, 200, 0.8);
  background: radial-gradient(circle at 34% 30%, #fff6cf 0%, var(--escuela_trig-gold) 55%, #6f611c 100%);
  box-shadow: 0 0 12px rgba(189, 168, 56, 0.95);
  cursor: pointer;
}

.escuela_trig-slider::-moz-range-track {
  height: 6px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--escuela_trig-ruby), var(--escuela_trig-violet), var(--escuela_trig-blue));
}

.escuela_trig-number-input {
  width: 86px;
  text-align: center;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--escuela_trig-gold);
  background: rgba(4, 2, 18, 0.85);
  border: 1px solid rgba(189, 168, 56, 0.55);
  border-radius: 10px;
  padding: 8px 4px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.escuela_trig-number-input:focus {
  border-color: var(--escuela_trig-gold);
  box-shadow: 0 0 14px rgba(189, 168, 56, 0.4);
}

/* ---------------- Solutions box ---------------- */

.escuela_trig-solutions {
  border: 1px dashed rgba(189, 168, 56, 0.5);
  border-radius: 12px;
  background: linear-gradient(180deg, rgba(10, 6, 40, 0.55), rgba(2, 1, 14, 0.65));
  padding: 12px 14px;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.84rem;
  line-height: 1.75;
  color: var(--escuela_trig-gold);
  min-height: 74px;
  text-shadow: 0 0 8px rgba(189, 168, 56, 0.25);
  overflow-wrap: anywhere;
}

.escuela_trig-solution-title {
  font-weight: 700;
  letter-spacing: 0.4px;
  margin-bottom: 4px;
}

.escuela_trig-solution-line { font-weight: 600; }

.escuela_trig-solution-note { font-size: 0.78rem; }

.escuela_trig-mode-hint {
  margin-top: 10px;
  font-size: 0.74rem;
  line-height: 1.5;
  color: var(--escuela_trig-gold);
}

/* ---------------- Live trig readouts ---------------- */

.escuela_trig-readout-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}

.escuela_trig-readout-cell {
  border: 1px solid rgba(189, 168, 56, 0.3);
  border-radius: 12px;
  padding: 10px 12px;
  background: linear-gradient(170deg, rgba(16, 8, 44, 0.75), rgba(3, 2, 16, 0.85));
  box-shadow: inset 0 0 18px rgba(77, 8, 142, 0.25);
}

.escuela_trig-readout-label {
  display: block;
  font-size: 0.72rem;
  letter-spacing: 1.6px;
  text-transform: uppercase;
  margin-bottom: 4px;
  color: var(--escuela_trig-gold);
}

.escuela_trig-readout-value {
  display: block;
  font-family: var(--escuela_trig-font-mono);
  font-size: 1.12rem;
  font-weight: 700;
  color: var(--escuela_trig-gold);
  text-shadow: 0 0 12px rgba(189, 168, 56, 0.5);
}

.escuela_trig-footer-note {
  margin-top: 16px;
  font-family: var(--escuela_trig-font-mono);
  font-size: 0.74rem;
  line-height: 1.6;
  color: var(--escuela_trig-gold);
}

/* ---------------- A11y / selection ---------------- */

.escuela_trig-app button:focus-visible,
.escuela_trig-app input:focus-visible,
.escuela_trig-app select:focus-visible {
  outline: 2px solid rgba(189, 168, 56, 0.85);
  outline-offset: 2px;
}

.escuela_trig-body ::selection {
  background: rgba(189, 168, 56, 0.4);
  color: #ffffff;
}

/* ---------------- Responsive ---------------- */

@media (max-width: 960px) {
  .escuela_trig-layout { grid-template-columns: 1fr; }
  .escuela_trig-stage-inner { max-width: min(100%, 66vh); }
  .escuela_trig-panel { width: 100%; max-width: 660px; margin: 0 auto; }
}

@media (max-width: 480px) {
  .escuela_trig-app { padding: 20px 12px 32px; }
  .escuela_trig-stage-hint { display: none; }
  .escuela_trig-fraction-row { flex-wrap: wrap; }
  .escuela_trig-fraction-hint { flex-basis: 100%; order: 3; }
  .escuela_trig-readout-value { font-size: 1rem; }
  .escuela_trig-angle-readout { font-size: 0.94rem; }
}

@media (prefers-reduced-motion: reduce) {
  .escuela_trig-header,
  .escuela_trig-layout { animation: none; }
  .escuela_trig-mode-btn,
  .escuela_trig-chip { transition: none; }
}