/* =============================================================
   ROBOTICS ENGINEERING CLUB — Supplemental CSS
   Extends club-sub.css with the S-T-E-M pillars strip
   ============================================================= */

/* Hero accent */
.robotics-hero__accent { color: #1a7a3c; }

/* ── STEM Pillars Strip ── */
.robotics-stem {
    padding-block: clamp(2rem, 4vw, 3rem);
    background: var(--color-primary);
}
.robotics-stem__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: clamp(1rem, 2vw, 1.5rem);
}
.robotics-stem__card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: clamp(1rem, 2vw, 1.5rem);
    background: rgba(255,255,255,0.06);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius-md);
    transition: background 0.22s ease, transform 0.22s ease;
}
.robotics-stem__card:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-3px);
}

/* Big STEM letter */
.robotics-stem__letter {
    font-family: var(--font-heading);
    font-weight: 900;
    font-size: clamp(2rem, 3.5vw, 3rem);
    line-height: 1;
    flex-shrink: 0;
    width: 52px;
    text-align: center;
    color: #1a7a3c;
    background: rgba(26,122,60,0.18);
    border-radius: var(--radius-sm);
    padding: 0.2rem 0.4rem;
}
.robotics-stem__letter--t { color: #f4b91f; background: rgba(244,185,31,0.18); }
.robotics-stem__letter--e { color: #e61f2a; background: rgba(230,31,42,0.18); }
.robotics-stem__letter--m { color: #0d7aa8; background: rgba(13,122,168,0.18); }

.robotics-stem__title {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: clamp(0.9rem, 1.4vw, 1.05rem);
    color: #fff;
    margin: 0 0 0.35rem;
}
.robotics-stem__text {
    font-size: clamp(0.8rem, 1.1vw, 0.87rem);
    line-height: 1.7;
    color: rgba(255,255,255,0.7);
    margin: 0;
}

/* ── Responsive ── */
@media (max-width: 900px) {
    .robotics-stem__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .robotics-stem__grid { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
    .robotics-stem__card { transition: none !important; transform: none !important; }
}