/* ============================================================
   PROJECTS & STARTUPS SECTION
============================================================ */

.projects {
  width: 100%;
  padding: 4vh 3% 5.5vh;
  background: transparent;
  border-top: 2px solid rgba(8, 38, 110, 0.32);
}

.projects-title {
  font-weight: 900;
  color: #0a1628;
  text-transform: uppercase;
  text-align: center;
  line-height: 1.05;
  letter-spacing: 0.01em;
  font-size: clamp(2rem, 5vw, 4.5rem);
  margin-bottom: clamp(18px, 3.5vh, 48px);
}

/* ── 4-column grid ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: clamp(10px, 1.4vw, 18px);
  max-width: 1440px;
  margin: 0 auto;
}

/* ── Flip card shell ── */
.card {
  height: clamp(300px, 46vh, 520px);
  border-radius: 0;
  cursor: pointer;
  perspective: 1200px;
}

/* ── Inner 3-D wrapper ── */
.card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transform-style: preserve-3d;
  transition: transform 0.65s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Desktop — flip on hover */
@media (hover: hover) {
  .card:hover .card-inner {
    transform: rotateY(180deg);
  }
}

/* Mobile — flip on first tap (JS adds .flipped) */
.card.flipped .card-inner {
  transform: rotateY(180deg);
}

/* ── Front & back faces ── */
.card-front,
.card-back {
  position: absolute;
  inset: 0;
  overflow: hidden;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.card-back {
  transform: rotateY(180deg);
}

.card-front img,
.card-back img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

/* Fallback bg in case image has transparency */
.card-rypto      { background: #0d1b3e; }
.card-mindcandle { background: rgba(200, 232, 248, 0.5); }
.card-ragents    { background: #5c0a0a; }
.card-github     { background: rgba(200, 232, 248, 0.5); }

/* ── Tablet ── */
@media (max-width: 1024px) {
  .projects-title { font-size: clamp(1.9rem, 5.5vw, 3.8rem); }
}

/* ── Mobile ── */
@media (max-width: 640px) {
  .projects       { padding: 4vh 4% 5vh; }
  .projects-title { font-size: clamp(1.75rem, 8.5vw, 2.4rem); }
  .projects-grid  { grid-template-columns: repeat(2, 1fr); gap: 10px; }
  .card           { height: clamp(200px, 44vw, 300px); }
}

@media (max-width: 380px) {
  .card { height: clamp(180px, 46vw, 260px); }
}