/* =========================
   DAVID MPANGALA — PORTFOLIO
   style.css
========================= */

/* ── RESET (backup — index.html already has this) ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html { scroll-behavior: smooth; }

/* ── SELECTION COLOR ── */
::selection {
  background: rgba(108, 99, 255, 0.35);
  color: #f0f0f8;
}

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: #0a0a0f; }
::-webkit-scrollbar-thumb { background: #6c63ff; border-radius: 2px; }

/* ── NAVBAR ACTIVE LINK ── */
.navbar ul a.active {
  color: #f0f0f8;
}
.navbar ul a.active::after {
  width: 100%;
}

/* ── HERO FLOATING ANIMATION ── */
.profile-img {
  animation: float 5s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-10px); }
}

/* ── STAT CARD COUNTER ANIMATION ── */
.stat-number {
  display: block;
  transition: color 0.3s ease;
}

.stat-card:hover .stat-number {
  color: #38bdf8;
}

/* ── SKILL TAG HOVER GLOW ── */
.skill-tag:hover {
  box-shadow: 0 0 12px rgba(108, 99, 255, 0.25);
}

/* ── PROJECT CARD GRADIENT TOP LINE ── */
.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 2px;
  background: linear-gradient(90deg, #6c63ff, #38bdf8);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

.project-card:hover::before {
  transform: scaleX(1);
}

/* ── STACK TAG FONT ── */
.stack-tag {
  font-family: 'DM Mono', 'Courier New', monospace;
}

/* ── EXPERIENCE TIMELINE DOT PULSE ── */
.exp-item::before {
  transition: box-shadow 0.3s ease;
}

.exp-item:hover::before {
  box-shadow: 0 0 20px rgba(108, 99, 255, 0.7);
}

/* ── CONTACT LINK HOVER ── */
.contact-link:hover .contact-link-icon {
  background: rgba(108, 99, 255, 0.2);
  color: #a78bfa;
}

/* ── AVAILABILITY CARD GLOW ── */
.availability-card {
  position: relative;
  overflow: hidden;
}

.availability-card::before {
  content: '';
  position: absolute;
  top: -50%; left: -50%;
  width: 200%; height: 200%;
  background: radial-gradient(circle, rgba(108,99,255,0.06) 0%, transparent 60%);
  pointer-events: none;
}

/* ── FOOTER LINK ── */
footer a {
  color: #6c63ff;
  text-decoration: none;
  transition: opacity 0.3s;
}
footer a:hover { opacity: 0.75; }

/* ── SECTION DIVIDER LINE ── */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, rgba(108,99,255,0.3), transparent);
  margin: 0 auto;
  max-width: 1100px;
}

/* ── MOBILE HAMBURGER (hidden by default) ── */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 4px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #f0f0f8;
  border-radius: 2px;
  transition: all 0.3s ease;
}

.hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* ── MOBILE NAV DRAWER ── */
@media (max-width: 768px) {
  .hamburger { display: flex; }

  .navbar ul {
    display: none;
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: rgba(10, 10, 15, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 1rem 0;
    border-bottom: 1px solid rgba(108,99,255,0.15);
  }

  .navbar ul.open { display: flex; }

  .navbar ul li { width: 100%; text-align: center; }

  .navbar ul a {
    display: block;
    padding: 0.85rem 2rem;
    font-size: 0.95rem;
  }

  .nav-cta {
    margin: 0.5rem auto;
    display: inline-block;
    width: auto;
  }

  /* Hero adjustments */
  .hero { padding: 7rem 1.5rem 4rem; }
  .hero h1 { font-size: clamp(2rem, 8vw, 3rem); }

  /* About grid → single column */
  .about-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .about-stats {
    grid-template-columns: 1fr 1fr;
  }

  /* Projects grid → single column on small screens */
  .projects-grid {
    grid-template-columns: 1fr;
  }

  /* Contact grid → single column */
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  /* Experience timeline left padding */
  .exp-timeline { padding-left: 1.25rem; }

  /* Sections */
  .section { padding: 4rem 1.25rem; }
  .section-full { padding: 4rem 1.25rem; }

  /* Cert grid */
  .cert-grid { grid-template-columns: 1fr; }

  /* Skills grid */
  .skills-grid { grid-template-columns: 1fr; }

  /* Exp date wrap */
  .exp-date {
    margin-left: 0;
    width: 100%;
    margin-top: 4px;
  }
  .exp-meta { flex-direction: column; align-items: flex-start; }
}

/* ── EXTRA SMALL PHONES ── */
@media (max-width: 420px) {
  .hero-tags { gap: 6px; }
  .hero-tag { font-size: 0.75rem; padding: 0.25rem 0.7rem; }
  .buttons { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }
  .about-stats { grid-template-columns: 1fr; }
  .stat-number { font-size: 1.75rem; }
}

/* ── PRINT STYLES ── */
@media print {
  .navbar, .scroll-hint, .hero-glow, .hero-glow2 { display: none; }
  body { background: white; color: black; }
  .section, .section-full { padding: 2rem 1rem; }
}