/* ═══════════════════════════════════════════════════════════════
   SKILLS.CSS  –  Skills Section (Module 4)
   Jeeva Sivan Portfolio | Dark Futuristic Developer Theme
   No fake percentages. Categories + pill cards with glow.
   ═══════════════════════════════════════════════════════════════ */

/* ─── Section layout ─────────────────────────────────────────── */
.skills-content {
  padding-block: var(--sp-24);
}

/* ─── Section header ─────────────────────────────────────────── */
.skills-header {
  margin-bottom: var(--sp-16);
}

/* ═══════════════════════════════════════════════════════════════
   CATEGORY GRID
   2×2 on desktop, first 4 categories; wide row for Concepts.
   ═══════════════════════════════════════════════════════════════ */
.skills-categories {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: auto auto;
  gap: var(--sp-5);
  align-items: start;
}

/* The "Concepts" card spans the full row */
.sk-category-wide {
  grid-column: 1 / -1;
}

/* ═══════════════════════════════════════════════════════════════
   INDIVIDUAL CATEGORY CARD
   ═══════════════════════════════════════════════════════════════ */
.sk-category {
  background: rgba(6, 13, 31, 0.7);
  border: 1px solid rgba(59, 130, 246, 0.14);
  border-radius: var(--radius-xl);
  padding: var(--sp-6);
  display: flex;
  flex-direction: column;
  gap: var(--sp-5);
  transition:
    border-color var(--transition-base),
    box-shadow var(--transition-base),
    transform var(--transition-bounce);
  position: relative;
  overflow: hidden;
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
}

/* Subtle top border glow on hover */
.sk-category::before {
  content: '';
  position: absolute;
  top: 0;
  left: 10%;
  right: 10%;
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(96, 165, 250, 0.6), rgba(6, 182, 212, 0.6), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.sk-category:hover::before {
  opacity: 1;
}

.sk-category:hover {
  border-color: rgba(59, 130, 246, 0.35);
  box-shadow:
    0 8px 32px rgba(0,0,0,0.4),
    0 0 24px rgba(37, 99, 235, 0.1);
  transform: translateY(-3px);
}

/* ── Category header (icon + title) ── */
.sk-cat-header {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  padding-bottom: var(--sp-4);
  border-bottom: 1px solid rgba(59, 130, 246, 0.1);
}

.sk-cat-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-lg);
  background: rgba(37, 99, 235, 0.12);
  border: 1px solid rgba(59, 130, 246, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  color: var(--clr-blue-bright);
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.sk-category:hover .sk-cat-icon {
  background: rgba(37, 99, 235, 0.2);
  border-color: rgba(59, 130, 246, 0.4);
}

.sk-cat-title {
  font-size: var(--fs-sm);
  font-weight: var(--fw-semibold);
  color: var(--clr-text-primary);
  letter-spacing: 0.02em;
}

/* ═══════════════════════════════════════════════════════════════
   SKILL PILLS
   ═══════════════════════════════════════════════════════════════ */
.sk-pills {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
}

.sk-pill {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.04em;
  color: var(--clr-text-secondary);
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid rgba(255, 255, 255, 0.07);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  cursor: default;
  transition:
    color var(--transition-fast),
    background var(--transition-fast),
    border-color var(--transition-fast),
    box-shadow var(--transition-fast),
    transform var(--transition-bounce);
  white-space: nowrap;
}

/* ── Colour dot (technology brand colour) ── */
.sk-pill-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  flex-shrink: 0;
  filter: drop-shadow(0 0 3px currentColor);
}

/* ── Hover glow variants ── */
.sk-pill[data-glow="blue"]:hover {
  color: #93c5fd;
  background: rgba(37, 99, 235, 0.12);
  border-color: rgba(96, 165, 250, 0.5);
  box-shadow: 0 0 14px rgba(37, 99, 235, 0.25);
  transform: translateY(-2px);
}

.sk-pill[data-glow="cyan"]:hover {
  color: #67e8f9;
  background: rgba(6, 182, 212, 0.1);
  border-color: rgba(6, 182, 212, 0.5);
  box-shadow: 0 0 14px rgba(6, 182, 212, 0.25);
  transform: translateY(-2px);
}

.sk-pill[data-glow="purple"]:hover {
  color: #c4b5fd;
  background: rgba(109, 40, 217, 0.12);
  border-color: rgba(167, 139, 250, 0.5);
  box-shadow: 0 0 14px rgba(109, 40, 217, 0.25);
  transform: translateY(-2px);
}

.sk-pill[data-glow="green"]:hover {
  color: #86efac;
  background: rgba(22, 163, 74, 0.1);
  border-color: rgba(134, 239, 172, 0.45);
  box-shadow: 0 0 14px rgba(22, 163, 74, 0.2);
  transform: translateY(-2px);
}

.sk-pill[data-glow="orange"]:hover {
  color: #fdba74;
  background: rgba(234, 88, 12, 0.1);
  border-color: rgba(253, 186, 116, 0.45);
  box-shadow: 0 0 14px rgba(234, 88, 12, 0.2);
  transform: translateY(-2px);
}

/* ── Wide card pills can wrap more freely ── */
.sk-category-wide .sk-pills {
  gap: var(--sp-2);
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════ */

/* ── Large tablet (≤ 1200px): 2-col ── */
@media (max-width: 1200px) {
  .skills-categories {
    grid-template-columns: repeat(2, 1fr);
  }

  .sk-category-wide {
    grid-column: 1 / -1;
  }
}

/* ── Small tablet (≤ 768px) ── */
@media (max-width: 768px) {
  .skills-content {
    padding-block: var(--sp-16);
  }

  .skills-categories {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-4);
  }

  .sk-category {
    padding: var(--sp-5);
  }
}

/* ── Mobile (≤ 540px): single column ── */
@media (max-width: 540px) {
  .skills-categories {
    grid-template-columns: 1fr;
  }

  .sk-category-wide {
    grid-column: 1;
  }

  .sk-pill {
    font-size: 0.65rem;
    padding: 5px 11px;
  }
}

/* ── Reduced motion ── */
@media (prefers-reduced-motion: reduce) {
  .sk-category,
  .sk-pill {
    transition: none !important;
  }
}