/* Custom styles for the Simple Harmonic Motion simulator */

/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700&display=swap');

/* Global styles */
body {
  font-family: 'Poppins', sans-serif;
  background: linear-gradient(135deg, #e0f7fa 0%, #ffffff 100%);
  margin: 0;
  padding: 0;
}

/* Control panel styling */
#animationPanel {
  background: #f5f5f5;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  padding: 15px !important;
  margin: 20px auto !important;
  max-width: 90%;
  transition: all 0.3s ease;
}

#animationPanel button, 
#animationPanel fieldset,
#animationPanel label,
#animationPanel input {
  font-family: 'Poppins', sans-serif;
}

#animationPanel fieldset {
  margin: 0 8px;
  padding: 8px 15px;
  border-radius: 8px;
  background-color: #f9f9f9;
  transition: all 0.3s ease;
  box-shadow: 0 2px 5px rgba(0, 0, 0, 0.05);
}

#animationPanel fieldset:hover {
  background-color: #e3f2fd;
  transform: translateY(-2px);
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

#animationPanel input[type="radio"] {
  margin-right: 5px;
  cursor: pointer;
}

#animationPanel label {
  cursor: pointer;
  font-weight: 500;
  transition: color 0.3s ease;
}

#animationPanel label:hover {
  color: #00897b;
}

#dampingLabel {
  font-weight: 600;
  color: #00695c;
  margin-right: 10px;
}

/* Graph colors */
#plottingPanel path.trace {
  stroke: #00897b !important; /* Teal color for position */
  stroke-width: 2px !important;
}

#plottingPanel path.trace:nth-child(2) {
  stroke: #ff8f00 !important; /* Orange color for velocity */
  stroke-width: 2px !important;
}

/* Add animation for traces */
@keyframes dash {
  to {
    stroke-dashoffset: 1000;
  }
}

#plottingPanel path.trace {
  animation: dash 20s linear infinite;
}

/* Plotting panel */
#plots {
  border-radius: 12px;
  overflow: hidden;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  background: white;
  margin: 20px auto !important;
  transition: all 0.3s ease;
}

#plots:hover {
  box-shadow: 0 8px 25px rgba(0, 0, 0, 0.15);
  transform: translateY(-3px);
}

#plottingPanel {
  background: white;
}

/* Experiment info section */
.experiment-info {
  background: white;
  border-radius: 12px;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
  padding: 25px;
  margin: 30px auto;
  max-width: 90%;
  text-align: left;
}

.experiment-info h2 {
  color: #00695c;
  border-bottom: 2px solid #00897b;
  padding-bottom: 10px;
  margin-bottom: 20px;
}

.experiment-info p {
  line-height: 1.6;
  color: #333;
}

.experiment-info .formula {
  background: #f5f5f5;
  padding: 15px;
  border-radius: 8px;
  text-align: center;
  margin: 15px 0;
  font-size: 1.1em;
}

.experiment-info ul {
  padding-left: 20px;
}

.experiment-info li {
  margin-bottom: 10px;
  position: relative;
  padding-left: 15px;
}

.experiment-info li:before {
  content: "•";
  color: #00897b;
  font-weight: bold;
  position: absolute;
  left: 0;
}

/* Custom footer */
.custom-footer {
  background: #263238;
  color: white;
  text-align: center;
  padding: 15px;
  margin-top: 30px;
  font-size: 0.9em;
  font-weight: 300;
  letter-spacing: 0.5px;
}

/* Title styling */
#titlePanel button {
  font-family: 'Poppins', sans-serif !important;
  font-size: 1.8em !important;
  font-weight: 600 !important;
  color: #00695c !important;
  margin: 20px 0 !important;
  text-transform: uppercase;
  letter-spacing: 1px;
}

/* Improve equation display */
.formula {
  font-family: 'Poppins', sans-serif;
  line-height: 1.6;
}

/* Add smooth scrolling */
html {
  scroll-behavior: smooth;
}

/* Improve buttons */
button {
  font-family: 'Poppins', sans-serif !important;
  transition: all 0.3s ease !important;
}

button:hover {
  transform: translateY(-2px) !important;
}

/* Improve the equation display in the sidebar */
div[style*="position:absolute; right:50px"] {
  border-radius: 12px !important;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1) !important;
  background: #f9f9f9 !important;
  padding: 15px !important;
  height: auto !important;
  max-height: 600px !important;
  overflow-y: auto !important;
}

div[style*="position:absolute; right:50px"] h3 {
  color: #00695c !important;
  font-family: 'Poppins', sans-serif !important;
  border-bottom: 2px solid #00897b !important;
  padding-bottom: 8px !important;
}

div[style*="position:absolute; right:50px"] ul {
  font-family: 'Poppins', sans-serif !important;
  line-height: 1.6 !important;
}

/* ============================================================
   CONTROL PANEL — STYLISH INPUTS, SLIDERS & BUTTONS
   ============================================================ */

/* --- Hide number-input spinner arrows (Chrome / Safari / Edge) --- */
input[type="number"]::-webkit-outer-spin-button,
input[type="number"]::-webkit-inner-spin-button {
  -webkit-appearance: none;
  margin: 0;
}

/* --- Hide number-input spinner arrows (Firefox) --- */
input[type="number"] {
  -moz-appearance: textfield;
}

/* --- Stylish number inputs --- */
input[type="number"]#displacementField,
input[type="number"]#bField,
input[type="number"]#v0Field,
input[type="number"]#wField,
input[type="number"]#F0Field {
  width: 56px !important;
  padding: 5px 8px !important;
  border: 2px solid #b2dfdb !important;
  border-radius: 8px !important;
  background: linear-gradient(135deg, #ffffff, #f0fdfc) !important;
  color: #00695c !important;
  font-family: 'Poppins', sans-serif !important;
  font-size: 0.85em !important;
  font-weight: 600 !important;
  text-align: center !important;
  outline: none !important;
  box-shadow: 0 2px 6px rgba(0, 137, 123, 0.15) !important;
  transition: border-color 0.25s, box-shadow 0.25s !important;
  vertical-align: middle !important;
}

input[type="number"]#displacementField:focus,
input[type="number"]#bField:focus,
input[type="number"]#v0Field:focus,
input[type="number"]#wField:focus,
input[type="number"]#F0Field:focus {
  border-color: #00897b !important;
  box-shadow: 0 0 0 3px rgba(0, 137, 123, 0.2) !important;
}

/* --- Larger, modern range sliders (track) --- */
input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  height: 8px !important;
  border-radius: 4px !important;
  background: linear-gradient(to right, #00897b, #b2dfdb) !important;
  outline: none !important;
  cursor: pointer !important;
  transition: background 0.3s !important;
}

/* Chrome / Safari / Edge thumb */
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px !important;
  height: 22px !important;
  border-radius: 50% !important;
  background: linear-gradient(135deg, #00897b, #004d40) !important;
  border: 3px solid #ffffff !important;
  box-shadow: 0 2px 6px rgba(0, 77, 64, 0.4) !important;
  cursor: grab !important;
  transition: transform 0.15s, box-shadow 0.15s !important;
}

input[type="range"]::-webkit-slider-thumb:active {
  cursor: grabbing !important;
  transform: scale(1.2) !important;
  box-shadow: 0 4px 12px rgba(0, 77, 64, 0.5) !important;
}

/* Firefox thumb */
input[type="range"]::-moz-range-thumb {
  width: 22px !important;
  height: 22px !important;
  border-radius: 50% !important;
  background: linear-gradient(135deg, #00897b, #004d40) !important;
  border: 3px solid #ffffff !important;
  box-shadow: 0 2px 6px rgba(0, 77, 64, 0.4) !important;
  cursor: grab !important;
}

/* Make the slider wrapper taller so the thumb doesn't get clipped */
#bSlider.div2,
#v0Slider.div2,
#wSlider.div2,
#F0Slider.div2,
div[id$="Slider.div2"] {
  padding: 6px 0 !important;
}

/* --- Unit label buttons (b, v₀, ω, F₀ unit tags) --- */
button#bLabel2,
button#v0Label2,
button#wLabel2,
button#F0Label2,
button#displacementLabel2 {
  display: inline-block !important;
  padding: 4px 9px !important;
  margin-left: 4px !important;
  background: linear-gradient(135deg, #e0f2f1, #b2dfdb) !important;
  color: #00695c !important;
  border: 1px solid #80cbc4 !important;
  border-radius: 6px !important;
  font-family: 'Poppins', sans-serif !important;
  font-size: 0.78em !important;
  font-weight: 600 !important;
  box-shadow: 0 1px 4px rgba(0, 137, 123, 0.15) !important;
  cursor: default !important;
  vertical-align: middle !important;
  transform: none !important;
}

/* --- Parameter label buttons (b:, v₀:, ω:, F₀:) --- */
button#bLabel,
button#v0Label,
button#wLabel,
button#F0Label,
button#displacementLabel {
  font-family: 'Poppins', sans-serif !important;
  font-size: 0.9em !important;
  font-weight: 700 !important;
  color: #004d40 !important;
  min-width: 28px !important;
  transform: none !important;
}

/* --- Play / Pause / Reset action buttons --- */
button#playPauseButton,
button#reset {
  width: 40px !important;
  height: 40px !important;
  border-radius: 50% !important;
  background: linear-gradient(135deg, #00897b, #00695c) !important;
  border: none !important;
  box-shadow: 0 3px 8px rgba(0, 77, 64, 0.35) !important;
  cursor: pointer !important;
  transition: transform 0.2s, box-shadow 0.2s !important;
  padding: 0 !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: center !important;
  vertical-align: middle !important;
}

button#playPauseButton:hover,
button#reset:hover {
  transform: scale(1.12) translateY(0) !important;
  box-shadow: 0 5px 14px rgba(0, 77, 64, 0.45) !important;
}

button#playPauseButton img,
button#reset img {
  filter: brightness(0) invert(1) !important; /* white icons */
  width: 18px !important;
  height: 18px !important;
}

/* ============================================================
   TWO-COLUMN SIMULATION LAYOUT
   Left  → plots + spring-mass animation canvas
   Right → damping controls + parameter sliders
   ============================================================ */

#sim-layout-wrapper {
  display: flex !important;
  flex-direction: row !important;
  align-items: flex-start !important;
  justify-content: center !important;
  gap: 28px !important;
  padding: 16px 12px !important;
  box-sizing: border-box !important;
  flex-wrap: wrap !important;
  width: 100% !important;
  margin: 0 auto !important;
}

/* Left column — simulation canvases */
#sim-left-col {
  flex: 0 0 auto !important;
  width: 975px !important;
  max-width: 100% !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 0 !important;
}

/* Right column — all controls */
#sim-right-col {
  flex: 1 1 300px !important;
  min-width: 280px !important;
  max-width: 400px !important;
  display: flex !important;
  flex-direction: column !important;
  gap: 18px !important;
  padding-top: 8px !important;
}

/* Make animationPanel and controlPanel fill the right column nicely */
#sim-right-col #animationPanel {
  background: linear-gradient(135deg, #e8f5e9, #f1f8e9) !important;
  border-radius: 14px !important;
  padding: 14px 18px !important;
  box-shadow: 0 4px 14px rgba(0,105,92,0.12) !important;
  border: 1px solid #c8e6c9 !important;
}

#sim-right-col #controlPanel {
  background: linear-gradient(135deg, #e0f7fa, #f9fbe7) !important;
  border-radius: 14px !important;
  padding: 16px 18px !important;
  box-shadow: 0 4px 14px rgba(0,105,92,0.12) !important;
  border: 1px solid #b2dfdb !important;
  width: auto !important;
  text-align: left !important;
}

/* Right-column label headings */
#sim-right-col #animationPanel #dampingLabel {
  display: block !important;
  font-size: 0.85em !important;
  font-weight: 700 !important;
  color: #004d40 !important;
  letter-spacing: 0.5px !important;
  text-transform: uppercase !important;
  margin-bottom: 10px !important;
  border-bottom: 2px solid #80cbc4 !important;
  padding-bottom: 6px !important;
}

/* Stack slider panels vertically inside the right column */
#sim-right-col #parameterPanelTop,
#sim-right-col #parameterPanelBottom {
  display: flex !important;
  flex-direction: column !important;
  gap: 12px !important;
}

#sim-right-col .slider-panel,
#sim-right-col #wSliderPanel,
#sim-right-col #F0SliderPanel {
  display: flex !important;
  flex-direction: row !important;
  align-items: center !important;
  gap: 6px !important;
  width: 100% !important;
  margin: 0 !important;
}

/* Make sliders fill available width in right column */
#sim-right-col #bSlider,
#sim-right-col #v0Slider,
#sim-right-col #wSlider,
#sim-right-col #F0Slider {
  flex: 1 1 auto !important;
  min-width: 100px !important;
  width: auto !important;
}

#sim-right-col #bSlider .div2,
#sim-right-col #v0Slider .div2,
#sim-right-col #wSlider .div2,
#sim-right-col #F0Slider .div2,
#sim-right-col div[id$='Slider.div2'] {
  width: 100% !important;
}

#sim-right-col input[type='range'] {
  width: 100% !important;
}

/* ─── Damping fieldset spacing & labels ─── */
.damping-controls {
  display: flex !important;
  flex-wrap: wrap !important;
  gap: 8px 12px !important;
  position: static !important;
  margin-top: 10px !important;
  align-items: center !important;
}

.damping-controls fieldset {
  display: inline-flex !important;
  align-items: center !important;
  gap: 4px !important;
  padding: 6px 12px !important;
  margin: 0 !important;
  border: 1px solid #b2dfdb !important;
  border-radius: 8px !important;
  background: white !important;
  cursor: pointer !important;
  transition: background 0.2s, border-color 0.2s, box-shadow 0.2s !important;
}

.damping-controls fieldset:hover {
  background: #e0f2f1 !important;
  border-color: #00897b !important;
  box-shadow: 0 2px 8px rgba(0,137,123,0.15) !important;
}

.damping-controls label {
  cursor: pointer !important;
  font-weight: 600 !important;
  font-size: 0.85rem !important;
  color: #004d40 !important;
  user-select: none !important;
}

/* ─── Responsive layouts ─── */

/* Stack on medium screens */
@media (max-width: 1100px) {
  #sim-layout-wrapper {
    flex-direction: column !important;
    align-items: center !important;
  }
  #sim-left-col {
    width: 100% !important;
    max-width: 100% !important;
  }
  #plots {
    width: 100% !important;
    height: auto !important;
    aspect-ratio: 975 / 600 !important;
  }
  #plotpanel {
    width: 100% !important;
  }
  #graphpanel {
    width: 100% !important;
  }
  #sim-right-col {
    max-width: 100% !important;
    width: 100% !important;
  }
}

/* Mobile-friendly scaling */
@media (max-width: 768px) {
  #sim-layout-wrapper {
    padding: 8px 6px !important;
    gap: 14px !important;
  }
  #sim-left-col {
    width: 100% !important;
  }
  #plots {
    width: 100% !important;
    max-width: 100% !important;
    height: auto !important;
  }
  #plotpanel {
    width: 100% !important;
    max-width: 100% !important;
  }
  #sim-right-col {
    min-width: unset !important;
    width: 100% !important;
    gap: 12px !important;
  }
  .damping-controls {
    gap: 6px 8px !important;
  }
  .damping-controls fieldset {
    padding: 5px 8px !important;
  }
  .damping-controls label {
    font-size: 0.78rem !important;
  }
}