/* ── Tutorials section ─────────────────────────────────── */
#tutorials { padding: 100px 0; }

.tut-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 56px;
}

.tut-card {
  background: var(--bg2);
  border: 1px solid var(--border);
  border-radius: var(--r2);
  overflow: hidden;
  transition: border-color 0.2s, transform 0.2s, box-shadow 0.2s;
}
.tut-card:hover {
  border-color: var(--amber-ring, rgba(245,166,35,0.4));
  transform: translateY(-4px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.4);
}

.tut-video-wrap {
  position: relative;
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #000;
}
.tut-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.tut-info {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
}
.tut-num {
  font-family: var(--f-display);
  font-size: 11px;
  font-weight: 700;
  color: var(--amber);
  letter-spacing: 0.08em;
  flex-shrink: 0;
}
.tut-title {
  font-family: var(--f-display);
  font-size: 14px;
  font-weight: 700;
  color: var(--ink);
  line-height: 1.4;
}
.tut-desc {
  font-size: 12px;
  color: var(--ink3);
  line-height: 1.55;
  margin-top: 3px;
}

/* Play overlay button */
.tut-card { cursor: pointer; }
.tut-video-wrap { position: relative; }
.tut-play-btn {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  background: rgba(0,0,0,0.3);
  opacity: 0; transition: opacity 0.2s;
}
.tut-card:hover .tut-play-btn { opacity: 1; }
.tut-play-btn i {
  width: 52px; height: 52px;
  background: var(--amber); border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: #000; stroke-width: 2;
  padding-left: 4px;
}

/* Lightbox */
#tut-lightbox {
  position: fixed; inset: 0; z-index: 2000;
  background: rgba(0,0,0,0.92);
  backdrop-filter: blur(10px);
  display: flex; align-items: center; justify-content: center;
  opacity: 0; pointer-events: none;
  transition: opacity 0.25s ease;
}
#tut-lightbox.open { opacity: 1; pointer-events: auto; }
.tut-lb-inner {
  position: relative;
  width: min(90vw, 1100px);
  border-radius: var(--r2);
  overflow: hidden;
  box-shadow: 0 32px 80px rgba(0,0,0,0.8);
}
.tut-lb-inner video {
  width: 100%; display: block;
  aspect-ratio: 16/9; background: #000;
}
.tut-lb-close {
  position: absolute; top: 12px; right: 14px; z-index: 10;
  background: rgba(0,0,0,0.6); border: none;
  color: #fff; font-size: 22px; width: 36px; height: 36px;
  border-radius: 50%; cursor: pointer; line-height: 1;
  display: flex; align-items: center; justify-content: center;
  transition: background 0.15s;
}
.tut-lb-close:hover { background: var(--amber); color: #000; }

/* ── Light mode ────────────────────────────────────────── */
html.light-mode .tut-card {
  background: rgba(0,0,0,0.03);
  border-color: rgba(0,0,0,0.09);
}
html.light-mode .tut-card:hover {
  border-color: var(--amber);
}

/* ── Responsive ────────────────────────────────────────── */
@media (max-width: 900px) {
  .tut-grid { grid-template-columns: 1fr; max-width: 480px; margin-left: auto; margin-right: auto; }
}