/* =====================================
   JavaScripts tools page styling
   (Basic Arithmetic Mentor)
   ===================================== */

.js-page {
  background: rgba(15, 23, 42, 0.92);
  border-radius: 16px;
  padding: 1.5rem 1.25rem 2rem 1.25rem;
  box-shadow: 0 24px 60px rgba(15, 23, 42, 0.95);
  margin-top: 1rem;
}

/* Hero */
.js-hero h1 {
  text-align: center;
  font-size: 2rem;
  margin-bottom: 0.5rem;
}

.js-subtitle {
  text-align: center;
  max-width: 60rem;
  margin: 0 auto 1.2rem auto;
  color: #d1d5db;
}

/* Layout: two columns on desktop, stacked on mobile */
.js-layout {
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
  margin-top: 1rem;
}

.js-column {
  flex: 1;
}

.js-info ul {
  margin-left: 1.2rem;
}

/* Interactive card */
.js-card {
  background: radial-gradient(circle at top left, #020617, #020617);
  border-radius: 14px;
  padding: 1.2rem 1.3rem 1.4rem 1.3rem;
  border: 1px solid rgba(148, 163, 184, 0.4);
  box-shadow: 0 16px 40px rgba(15, 23, 42, 0.9);
}

.js-card h2 {
  margin-bottom: 0.8rem;
}

/* Controls */
.js-controls {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-bottom: 0.9rem;
}

.js-control-group {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  min-width: 150px;
}

.js-control-group label {
  font-size: 0.9rem;
  color: #e5e7eb;
}

.js-control-group select {
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  border: 1px solid #334155;
  background: #020617;
  color: #e5e7eb;
}

/* Problem & answer */
.js-problem-box {
  margin: 0.8rem 0;
  padding: 0.5rem 0.7rem;
  border-radius: 8px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid #1f2937;
}

.js-label {
  font-size: 0.85rem;
  color: #9ca3af;
  margin-bottom: 0.15rem;
}

.js-problem {
  font-size: 1.25rem;
  font-weight: 600;
}

.js-answer-box {
  margin-top: 0.6rem;
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.js-answer-box label {
  font-size: 0.9rem;
}

.js-answer-box input {
  padding: 0.4rem 0.5rem;
  border-radius: 6px;
  border: 1px solid #334155;
  background: #020617;
  color: #e5e7eb;
}

/* Buttons */
.js-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 0.9rem;
}

/* Reuse global .btn styles; ensure width is nice on mobile */
.js-buttons .btn {
  min-width: 120px;
}

/* Feedback */
.js-feedback {
  margin-top: 0.9rem;
  min-height: 1.4rem;
  font-weight: 500;
}

/* Responsive */
@media (min-width: 900px) {
  .js-layout {
    flex-direction: row;
    align-items: flex-start;
  }

  .js-info {
    padding-right: 0.75rem;
  }

  .js-tool {
    padding-left: 0.75rem;
  }
}

@media (max-width: 640px) {
  .js-page {
    padding: 1.2rem 0.9rem 2rem 0.9rem;
  }

  .js-buttons {
    flex-direction: column;
  }

  .js-buttons .btn {
    width: 100%;
    justify-content: center;
  }
}