/* ── profpi Shared Tools Styling ── */

.tool-page-container {
  max-width: 1140px;
  margin: 0 auto;
  padding: 40px 24px 80px;
}

.tool-header {
  margin-bottom: 32px;
}

.tool-header h1 {
  font-size: 2.2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.eyebrow {
  font-size: 0.85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--accent);
  margin-bottom: 6px;
}

.tool-description {
  font-size: 1.05rem;
  color: var(--text-muted);
  max-width: 700px;
  line-height: 1.5;
}

/* Two-column layout */
.tool-grid {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 32px;
  align-items: start;
}

@media (max-width: 900px) {
  .tool-grid {
    grid-template-columns: 1fr;
  }
}

/* Card components */
.tool-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.tool-card h2 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

/* Form Controls */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: block;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-row {
  display: flex;
  gap: 12px;
}

.form-row .form-group {
  flex: 1;
}

.input-control {
  width: 100%;
  padding: 12px 14px;
  background: var(--input-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  font-family: inherit;
  font-size: 16px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.input-control:focus {
  outline: none;
  border-color: var(--border-focus);
  box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.12);
}

select.input-control {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2364748b' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 14px center;
  background-size: 14px;
  padding-right: 40px;
}

html[data-theme="dark"] select.input-control {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 24 24' stroke='%2394a3b8' stroke-width='2.5'%3E%3Cpath stroke-linecap='round' stroke-linejoin='round' d='M19.5 8.25l-7.5 7.5-7.5-7.5'/%3E%3C/svg%3E");
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  width: 100%;
  transition: background 0.2s, transform 0.15s;
}

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  background: var(--card-active);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  padding: 12px 20px;
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.2s, border-color 0.2s;
}

.btn-secondary:hover {
  background: var(--border-color);
}

/* Outputs & Results */
.tool-output {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.result-card {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-lg);
}

.result-formula {
  background: var(--card-active);
  border-radius: var(--radius-md);
  padding: 16px;
  font-family: 'JetBrains Mono', monospace;
  font-size: 1.1rem;
  text-align: center;
  margin: 16px 0;
  color: var(--accent);
  border: 1px solid var(--border-color);
  word-wrap: break-word;
}

.result-steps {
  margin-top: 18px;
  border-top: 1px solid var(--border-color);
  padding-top: 18px;
}

.result-steps h3 {
  font-size: 1rem;
  margin-bottom: 12px;
}

.result-steps ol {
  padding-left: 20px;
  line-height: 1.6;
  font-size: 0.92rem;
  color: var(--text-muted);
}

.result-steps li {
  margin-bottom: 8px;
}

.result-steps li strong {
  color: var(--text-main);
}

/* Diagram rendering containers */
.visual-container {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--card-active);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 24px;
  min-height: 280px;
  position: relative;
  overflow: hidden;
}

.visual-container svg {
  max-width: 100%;
  max-height: 400px;
  height: auto;
}

.visual-actions {
  display: flex;
  justify-content: flex-end;
  gap: 12px;
  margin-top: 12px;
}

/* Tool Cross Links */
.tool-cross-links {
  margin-top: 48px;
  border-top: 1px solid var(--border-color);
  padding-top: 32px;
}

.tool-cross-links h3 {
  font-size: 1.1rem;
  margin-bottom: 16px;
}

.cross-links-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
  gap: 16px;
}

.cross-link-card {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px;
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.cross-link-card:hover {
  border-color: var(--accent);
  box-shadow: var(--shadow-lg);
}

.cross-link-card svg {
  color: var(--accent);
  transition: transform 0.2s;
}

.cross-link-card:hover svg {
  transform: translateX(4px);
}

/* Error alerts */
.error-alert {
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: var(--danger);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  font-size: 0.9rem;
  font-weight: 500;
  margin-bottom: 20px;
  display: none;
}