/* ========================================================================
   CODE ASSIST PAGE
   ======================================================================== */

.mode-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 14px;
  margin-bottom: 20px;
}

.mode-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 20px 18px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  background: var(--bg-primary);
  cursor: pointer;
  transition: all 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  text-align: left;
  font-family: var(--font-sans);
  overflow: hidden;
}
.mode-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.35s ease;
}
.mode-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, rgba(79,70,229,0.04), transparent 70%);
  opacity: 0;
  transition: opacity 0.35s ease;
  pointer-events: none;
}
.mode-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--border-medium);
}
.mode-card:hover::before { opacity: 1; }
.mode-card:hover::after { opacity: 1; }

.mode-card.active {
  border-color: var(--primary);
  background: linear-gradient(145deg, rgba(79,70,229,0.04), rgba(255,255,255,0.95));
  box-shadow: 0 4px 16px rgba(79,70,229,0.12), 0 0 0 1px rgba(79,70,229,0.2);
  transform: translateY(-2px);
}
.mode-card.active::before { opacity: 1; }

.mode-card-label {
  font-size: 15px;
  font-weight: 700;
  color: var(--text-primary);
  position: relative;
  z-index: 1;
}
.mode-card-desc {
  font-size: 12.5px;
  color: var(--text-tertiary);
  line-height: 1.4;
  position: relative;
  z-index: 1;
}

.code-main {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}

.code-input-section,
.code-result-section {
  background: var(--gradient-card);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 20px;
  display: flex;
  flex-direction: column;
  box-shadow: var(--shadow-sm);
}

.code-input-header,
.code-result-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 14px;
  gap: 12px;
}

.code-input-title,
.code-result-title {
  font-size: 14px;
  font-weight: 700;
  white-space: nowrap;
}

.code-lang-select {
  display: flex;
  align-items: center;
  gap: 8px;
}

.convert-arrow { color: var(--primary); font-size: 18px; font-weight: bold; }

.code-textarea {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 13.5px;
  line-height: 1.7;
  resize: vertical;
  min-height: 200px;
}

.code-submit-row { display: flex; gap: 12px; margin-top: 14px; }
.code-result-content { flex: 1; display: flex; flex-direction: column; }
.code-output { max-height: 600px; font-family: var(--font-mono); font-size: 13px; line-height: 1.7; }

@media (max-width: 860px) {
  .code-main { grid-template-columns: 1fr; gap: 16px; }
  .mode-grid { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .code-textarea { min-height: 160px; font-size: 15px; }
  .code-submit-row .btn { flex: 1; }
  .code-input-header { flex-wrap: wrap; gap: 8px; }
  .code-lang-select { width: 100%; }
  .code-lang-select select { flex: 1; }
}

@media (max-width: 640px) {
  .mode-grid { grid-template-columns: 1fr; }
  .code-lang-select { flex-direction: column; }
  .code-lang-select select { width: 100% !important; }
  .mode-card { padding: 14px 14px; }
}