/* ==========================================================================
   DANDI STUDIO — Homepage Styles
   Canvas graph + formula prompt + animated mascot
   ========================================================================== */

/* --------------------------------------------------------------------------
   Full-viewport lock (homepage only)
   -------------------------------------------------------------------------- */
body.page-home {
  overflow: hidden;
  width:    100vw;
  height:   100vh;
}

/* --------------------------------------------------------------------------
   Graph Canvas — fills entire viewport behind all other elements
   -------------------------------------------------------------------------- */
#graph-canvas {
  position:    fixed;
  top:         0;
  left:        0;
  width:       100%;
  height:      100%;
  display:     block;
  z-index:     1;
  cursor:      crosshair;
}

/* --------------------------------------------------------------------------
   Formula Input — top-left, floats over canvas
   -------------------------------------------------------------------------- */
#formula-container {
  position:   fixed;
  top:        20px;
  left:       20px;
  z-index:    10;
  display:    flex;
  flex-direction: column;
  gap:        5px;
  /* cap width so it never overlaps the mascot */
  max-width:  calc(100vw - 140px);
}

#formula-row {
  display:     flex;
  align-items: center;
  gap:         8px;
}

/* "> f(x) =" label  */
#formula-label {
  font-family:  var(--font-mono);
  font-size:    13px;
  color:        var(--green);
  white-space:  nowrap;
  user-select:  none;
  text-shadow:  0 0 6px var(--green);
  letter-spacing: 0.5px;
}

/* Text input field */
#formula-input {
  background:    transparent;
  border:        none;
  border-bottom: 1px solid var(--green);
  color:         var(--green);
  font-family:   var(--font-mono);
  font-size:     13px;
  width:         190px;
  outline:       none;
  caret-color:   var(--green);
  letter-spacing: 0.5px;
  padding-bottom: 1px;
  transition:    color 0.15s, border-color 0.15s;
}

#formula-input::placeholder {
  color: var(--green-dim);
}

#formula-input:focus {
  border-bottom-color: var(--cyan);
  color:               var(--cyan);
  caret-color:         var(--cyan);
}

/* Error / status message below the input row */
#formula-error {
  font-family:    var(--font-pixel);
  font-size:      7px;
  color:          var(--red);
  letter-spacing: 1px;
  min-height:     14px;
  text-shadow:    0 0 6px var(--red);
}

/* --------------------------------------------------------------------------
   Mascot Container — top-right, hover reveals navigation
   -------------------------------------------------------------------------- */
#mascot-container {
  position:       fixed;
  top:            16px;
  right:          16px;
  z-index:        10;
  display:        flex;
  flex-direction: column;
  align-items:    flex-end;
  gap:            8px;
  cursor:         pointer;
  /* Prevent text selection on repeated clicks */
  user-select:    none;
}

/* The canvas element injected by mascot.js */
#mascot-canvas {
  display:          block;
  image-rendering:  pixelated;
  image-rendering:  crisp-edges;
  /* Subtle green glow — intensifies on hover */
  filter:           drop-shadow(0 0 4px var(--green));
  transition:       filter 0.2s ease;
}

#mascot-container:hover   #mascot-canvas,
#mascot-container.active  #mascot-canvas {
  filter:
    drop-shadow(0 0  8px var(--green))
    drop-shadow(0 0 20px var(--green-dim));
}

/* --------------------------------------------------------------------------
   Mascot Navigation Links (slide in below mascot on hover)
   -------------------------------------------------------------------------- */
#mascot-nav {
  display:        flex;
  flex-direction: column;
  align-items:    flex-end;
  gap:            5px;

  /* Hidden by default */
  opacity:        0;
  transform:      translateY(-6px);
  pointer-events: none;
  transition:     opacity 0.18s ease, transform 0.18s ease;
}

/* Reveal on hover or .active (mobile tap) */
#mascot-container:hover  #mascot-nav,
#mascot-container.active #mascot-nav {
  opacity:        1;
  transform:      translateY(0);
  pointer-events: auto;
}

/* Individual nav links */
.nav-link {
  display:        inline-block;
  font-family:    var(--font-pixel);
  font-size:      7px;
  color:          var(--green);
  letter-spacing: 1px;
  padding:        5px 8px;
  background:     rgba(0, 0, 0, 0.88);
  border:         1px solid var(--green);
  white-space:    nowrap;
  transition:     color 0.1s, border-color 0.1s, background 0.1s;
}

.nav-link:hover,
.nav-link:focus {
  color:        var(--cyan);
  border-color: var(--cyan);
  background:   rgba(0, 255, 255, 0.06);
  outline:      none;
}

/* --------------------------------------------------------------------------
   Cookie Consent Banner — bottom of page
   -------------------------------------------------------------------------- */
#cookie-banner {
  position:        fixed;
  bottom:          0;
  left:            0;
  right:           0;
  z-index:         10000;
  background:      var(--bg);
  border-top:      2px solid var(--green);
  padding:         10px 20px;
  display:         flex;
  align-items:     center;
  justify-content: space-between;
  gap:             16px;
  flex-wrap:       wrap;
}

#cookie-banner p {
  font-family: var(--font-body);
  font-size:   18px;
  color:       var(--green);
  flex:        1;
  min-width:   200px;
}

#cookie-banner a {
  color:           var(--cyan);
  text-decoration: underline;
}

.cookie-buttons {
  display:    flex;
  gap:        8px;
  flex-shrink: 0;
}

.cookie-buttons button {
  font-family:    var(--font-pixel);
  font-size:      7px;
  color:          var(--green);
  background:     transparent;
  border:         1px solid var(--green);
  padding:        6px 10px;
  cursor:         pointer;
  letter-spacing: 1px;
  white-space:    nowrap;
  transition:     all 0.1s;
}

.cookie-buttons button:hover,
.cookie-buttons button:focus {
  color:       var(--bg);
  background:  var(--green);
  outline:     none;
}

/* --------------------------------------------------------------------------
   Responsive — small screens
   -------------------------------------------------------------------------- */
@media (max-width: 520px) {
  #formula-input {
    width: 140px;
  }

  #formula-label {
    font-size: 11px;
  }

  .nav-link {
    font-size: 6px;
    padding:   4px 6px;
  }

  #cookie-banner {
    flex-direction: column;
    align-items:    flex-start;
  }
}