/* Number Line Explorer Styles */

/* ========== BACK LINK ========== */

.back-link {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  font-size: var(--text-xl);
  color: var(--color-neutral-600);
  background: white;
  border: 2px solid var(--color-neutral-200);
  border-radius: var(--radius-lg);
  text-decoration: none;
  transition: all var(--duration-fast) var(--ease-out);
}

.back-link:hover {
  border-color: var(--color-secondary);
  color: var(--color-secondary);
}

/* ========== NUMBER LINE SVG ========== */

.number-line-svg {
  width: 100%;
  height: 200px;
  max-width: 900px;
}

/* Main line */
.number-line {
  stroke: var(--color-primary-dark);
  stroke-width: 3;
  stroke-linecap: round;
}

/* Tick marks */
.tick-major {
  stroke: var(--color-primary-dark);
  stroke-width: 2;
}

.tick-minor {
  stroke: var(--color-neutral-400);
  stroke-width: 1;
}

/* Tick labels */
.tick-label {
  font-family: var(--font-secondary);
  font-size: 14px;
  font-weight: 600;
  fill: var(--color-primary-dark);
  text-anchor: middle;
  user-select: none;
}

.tick-label.highlight {
  fill: var(--color-secondary);
  font-size: 16px;
  font-weight: 700;
}

/* Zero marker */
.zero-marker {
  fill: var(--color-secondary);
}

/* ========== DRAGGABLE POINT ========== */

.point-marker {
  cursor: grab;
  transition: transform 0.1s ease-out;
}

.point-marker:active {
  cursor: grabbing;
}

.point-circle {
  fill: var(--color-accent-pink);
  stroke: white;
  stroke-width: 3;
  filter: drop-shadow(0 3px 6px rgba(255, 105, 180, 0.4));
  transition: r 0.2s ease-out;
}

.point-marker:hover .point-circle {
  r: 18;
}

.point-label {
  font-family: var(--font-secondary);
  font-size: 16px;
  font-weight: 700;
  fill: var(--color-primary-dark);
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}

/* ========== HOP ARCS ========== */

.hop-arc {
  fill: none;
  stroke-width: 3;
  stroke-linecap: round;
  opacity: 0;
  animation: hopAppear 0.4s ease-out forwards;
}

@keyframes hopAppear {
  from {
    opacity: 0;
    stroke-dashoffset: var(--path-length, 100);
  }
  to {
    opacity: 0.7;
    stroke-dashoffset: 0;
  }
}

.hop-arc.positive {
  stroke: var(--color-success);
}

.hop-arc.negative {
  stroke: var(--color-accent-red);
}

.hop-label {
  font-family: var(--font-secondary);
  font-size: 12px;
  font-weight: 700;
  text-anchor: middle;
  pointer-events: none;
  user-select: none;
}

.hop-label.positive {
  fill: var(--color-success);
}

.hop-label.negative {
  fill: var(--color-accent-red);
}

/* ========== ARROW HEADS ========== */

.arrow-left,
.arrow-right {
  fill: var(--color-primary-dark);
}

/* ========== POSITION DISPLAY ========== */

#current-position {
  font-size: var(--text-2xl);
  font-weight: var(--weight-extrabold);
  color: var(--color-accent-pink);
  margin-left: var(--space-2);
}

/* ========== CHALLENGE FEEDBACK STATES ========== */

.tool-feedback.checking {
  background: linear-gradient(to bottom, #fef3c7, #fde68a);
  border-color: rgba(251, 191, 36, 0.3);
}

.tool-feedback.correct {
  background: linear-gradient(to bottom, #d1fae5, #a7f3d0);
  border-color: rgba(16, 185, 129, 0.3);
}

.tool-feedback.incorrect {
  background: linear-gradient(to bottom, #fee2e2, #fecaca);
  border-color: rgba(239, 68, 68, 0.3);
}

/* ========== RANGE-SPECIFIC STYLES ========== */

/* For larger ranges, smaller text */
.number-line-svg.range-large .tick-label {
  font-size: 11px;
}

.number-line-svg.range-large .tick-label.highlight {
  font-size: 13px;
}

/* ========== TOUCH FRIENDLY ========== */

@media (pointer: coarse) {
  .point-circle {
    r: 18;
  }

  .point-marker:hover .point-circle {
    r: 20;
  }
}

/* ========== MOBILE RESPONSIVE ========== */

@media (max-width: 767px) {
  .number-line-svg {
    height: 160px;
  }

  .tick-label {
    font-size: 11px;
  }

  .tick-label.highlight {
    font-size: 13px;
  }

  .point-label {
    font-size: 14px;
  }

  #current-position {
    font-size: var(--text-xl);
  }
}