/* ── Note cards grid ──────────────────────────────────────── */
.note-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: 1.2rem;
  margin-bottom: 0.5rem;
}

.note-card {
  display: block;
  border: 1px solid var(--rule);
  border-radius: 3px;
  padding: 1.4rem 1.6rem;
  text-decoration: none;
  color: var(--ink);
  transition: border-color 0.15s, box-shadow 0.15s;
  position: relative;
}

.note-card:hover {
  border-color: var(--accent);
  box-shadow: 0 2px 12px rgba(26,58,92,0.07);
}

.note-card--placeholder {
  opacity: 0.5;
  cursor: default;
}

.note-card--placeholder:hover {
  border-color: var(--rule);
  box-shadow: none;
}

.note-tag {
  display: inline-block;
  font-size: 0.72rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.6rem;
  font-weight: 400;
}

.note-card h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
  margin-bottom: 0.4rem;
}

.note-card p {
  font-size: 0.88rem;
  color: var(--ink-mid);
  line-height: 1.5;
}

.note-card code {
  font-size: 0.82rem;
  background: var(--off-white);
  padding: 0.1em 0.3em;
  border-radius: 2px;
}

.note-arrow {
  position: absolute;
  top: 1.4rem;
  right: 1.4rem;
  color: var(--accent);
  font-size: 1rem;
  opacity: 0;
  transform: translateX(-4px);
  transition: opacity 0.15s, transform 0.15s;
}

.note-card:hover .note-arrow {
  opacity: 1;
  transform: translateX(0);
}

/* ── Interactive model layout ─────────────────────────────── */
.model-container {
  display: grid;
  grid-template-columns: 1fr 260px;
  grid-template-rows: auto auto;
  gap: 1.5rem 2rem;
  margin-bottom: 3rem;
  align-items: start;
}

#islm-canvas {
  grid-column: 1;
  grid-row: 1 / 3;
  display: block;
  width: 100%;
  border: 1px solid var(--rule);
  border-radius: 2px;
  background: var(--off-white);
}

.controls {
  grid-column: 2;
  grid-row: 1;
  display: flex;
  flex-direction: column;
  gap: 1.4rem;
}

.control-group label {
  display: block;
  font-size: 0.82rem;
  color: var(--ink-light);
  letter-spacing: 0.03em;
  margin-bottom: 0.4rem;
}

.slider-row {
  display: flex;
  align-items: center;
  gap: 0.8rem;
}

.slider-row input[type="range"] {
  flex: 1;
  accent-color: var(--accent);
  cursor: pointer;
}

.slider-val {
  font-family: var(--font-serif);
  font-size: 1rem;
  color: var(--ink);
  min-width: 2.5rem;
  text-align: right;
}

.equilibrium-display {
  grid-column: 2;
  grid-row: 2;
  border: 1px solid var(--rule);
  border-radius: 2px;
  padding: 1rem 1.2rem;
  background: var(--off-white);
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.eq-item {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
}

.eq-label {
  font-size: 0.82rem;
  color: var(--ink-light);
}

.eq-value {
  font-family: var(--font-serif);
  font-size: 1.15rem;
  font-weight: 500;
  color: var(--accent);
}

.model-notes p { color: var(--ink-mid); font-size: 0.95rem; }

/* ── Teaching page ────────────────────────────────────────── */
.course-list {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.course {
  padding: 1.8rem 0;
  border-bottom: 1px solid var(--rule);
}

.course:first-child { border-top: 1px solid var(--rule); }

.course-header {
  display: flex;
  align-items: baseline;
  gap: 1rem;
  margin-bottom: 0.3rem;
}

.course-header h3 {
  font-family: var(--font-serif);
  font-size: 1.05rem;
  font-weight: 500;
}

.course-level {
  font-size: 0.78rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--ink-light);
}

.course-meta {
  font-size: 0.88rem;
  color: var(--ink-light);
  margin-bottom: 0.5rem;
}

.course-desc {
  font-size: 0.9rem;
  color: var(--ink-mid);
  margin-bottom: 0.6rem;
}

/* ── Contact page ─────────────────────────────────────────── */
.contact-block { max-width: 520px; }

.contact-intro {
  color: var(--ink-mid);
  margin-bottom: 2.5rem;
}

.contact-label {
  display: block;
  font-size: 0.78rem;
  letter-spacing: 0.07em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 0.3rem;
}

.contact-email-block { margin-bottom: 2rem; }

.contact-email {
  font-family: var(--font-serif);
  font-size: 1.3rem;
  color: var(--accent);
  text-decoration: none;
  transition: opacity 0.15s;
}

.contact-email:hover { opacity: 0.75; }

.contact-address {
  font-style: normal;
  font-size: 0.92rem;
  color: var(--ink-mid);
  line-height: 1.8;
}

.social-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

.social-item {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  padding: 1rem 1.2rem;
  border: 1px solid var(--rule);
  border-radius: 2px;
  transition: border-color 0.15s;
}

.social-item:hover { border-color: var(--accent); }

.social-platform {
  font-size: 0.82rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--ink-light);
  margin-bottom: 0.2rem;
}

.social-handle {
  font-family: var(--font-serif);
  font-size: 0.95rem;
  color: var(--accent);
}

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 680px) {
  .model-container {
    grid-template-columns: 1fr;
  }

  #islm-canvas { grid-row: 1; }
  .controls { grid-column: 1; grid-row: 2; }
  .equilibrium-display { grid-column: 1; grid-row: 3; }

  .social-grid { grid-template-columns: 1fr; }

  .course { padding: 1.4rem 0; }
  .course-header { flex-wrap: wrap; gap: 0.1rem 0.8rem; }
  .course-header h3 { font-size: 1.15rem; line-height: 1.4; }
  .course-meta, .course-desc { font-size: 0.95rem; }

  .contact-block { max-width: none; }
  .contact-email { font-size: 1.25rem; }
  .contact-address { font-size: 1rem; }
  .note-grid { grid-template-columns: 1fr; }
}