/* =========================================================
   portfolio.css — Custom keyframes & JS-controlled classes
   Tailwind CDN handles all utility classes in index.html
   ========================================================= */

:root {
  --surface: #f9f6f5;
  --surface-lowest: #ffffff;
  --surface-low: #f3f0ef;
  --surface-container: #eae7e7;
  --surface-high: #e5e2e1;
  --on-surface: #2f2e2e;
  --on-surface-variant: #5c5b5b;
  --primary: #00647b;
  --primary-container: #00cffc;
  --on-primary: #e2f6ff;
  --outline-variant: #afacac;
}

/* ── Scroll Progress ── */
#scroll-progress {
  position: fixed; top: 0; left: 0;
  height: 3px; width: 0%;
  background: linear-gradient(90deg, #00647b, #00cffc);
  z-index: 9999;
  transition: width 0.1s linear;
}

/* ── Hero Name Char Animation ── */
.char {
  display: inline-block;
  opacity: 0;
  transform: translateY(18px);
  animation: charReveal 0.4s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}
@keyframes charReveal {
  to { opacity: 1; transform: translateY(0); }
}

/* ── Typewriter Cursor ── */
.typewriter-cursor {
  display: inline-block;
  animation: blink 0.85s step-end infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* ── Section Fade-in (JS adds this class) ── */
.section-revealed { opacity: 1 !important; transform: none !important; }

/* ── Material Symbols ── */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
}

/* ── Nav: Scrolled shadow ── */
#navbar.scrolled {
  box-shadow: 0 4px 24px rgba(47, 46, 46, 0.08);
}

/* ── Nav: Active link ── */
.nav-link.active {
  color: #00647b !important;
  font-weight: 700;
}

/* ── Mobile Menu ── */
#nav-links.active {
  transform: translateX(0) !important;
}
#mobile-overlay.active {
  display: block !important;
}
#mobile-toggle .icon-close { display: none; }
#mobile-toggle.active .icon-menu { display: none; }
#mobile-toggle.active .icon-close { display: inline; }

/* ── Projects Grid (JS-injected) ── */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.project-card {
  background: var(--surface-lowest);
  border-radius: 0.75rem;
  overflow: hidden;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16,1,0.3,1),
              background-color 0.3s ease, box-shadow 0.3s ease;
}
.project-card.visible { opacity: 1; transform: translateY(0); }
.project-card:hover {
  background: var(--surface-high);
  box-shadow: 0 20px 40px rgba(47,46,46,0.06);
}
.project-image {
  width: 100%;
  aspect-ratio: 16/9;
  background: linear-gradient(135deg, rgba(0,100,123,0.08), rgba(0,207,252,0.15));
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
  font-size: 3rem;
}
.project-image img { width: 100%; height: 100%; object-fit: cover; }
.project-content { padding: 1.5rem 2rem 2rem; }
.project-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 0.5rem;
}
.project-description {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: 1rem;
}
.project-tech { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.25rem; }
.tech-tag {
  padding: 0.25rem 0.75rem;
  background: var(--surface-container);
  border-radius: 9999px;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  font-family: 'Inter', sans-serif;
}
.project-links { display: flex; gap: 1rem; align-items: center; flex-wrap: wrap; }
.project-link {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  text-decoration: none;
  transition: opacity 0.2s;
}
.project-link.primary { color: var(--primary); }
.project-link.secondary { color: var(--on-surface-variant); }
.project-link:hover { opacity: 0.7; }

/* ── Blog Grid (JS-injected) ── */
.blog-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
}
.blog-card {
  background: var(--surface-lowest);
  border-radius: 0.75rem;
  padding: 2rem;
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16,1,0.3,1),
              background-color 0.3s ease;
}
.blog-card.visible { opacity: 1; transform: translateY(0); }
.blog-card:hover { background: var(--surface-high); }
.blog-date {
  font-family: 'Inter', sans-serif;
  font-size: 0.6875rem;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--primary);
  font-weight: 600;
  margin-bottom: 0.75rem;
}
.blog-title {
  font-family: 'Manrope', sans-serif;
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--on-surface);
  margin-bottom: 0.75rem;
  line-height: 1.4;
}
.blog-excerpt {
  font-size: 0.875rem;
  color: var(--on-surface-variant);
  line-height: 1.6;
  margin-bottom: 1.25rem;
}
.blog-link {
  font-family: 'Inter', sans-serif;
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--primary);
  text-decoration: none;
}
.blog-link:hover { text-decoration: underline; }

/* ── Cert & Award Card Reveal (JS adds .visible) ── */
.cert-card, .award-card {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s cubic-bezier(0.16,1,0.3,1);
}
.cert-card.visible, .award-card.visible { opacity: 1; transform: translateY(0); }

/* ── Stat Counter Card ── */
.stat-item {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.stat-item.visible { opacity: 1; transform: translateY(0); }

/* ── Modals ── */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(47, 46, 46, 0.55);
  backdrop-filter: blur(4px);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}
.modal-overlay.active { display: flex; }
.modal-dialog {
  background: var(--surface-lowest);
  border-radius: 1rem;
  width: 100%;
  max-width: 680px;
  max-height: 85vh;
  overflow-y: auto;
  box-shadow: 0 20px 60px rgba(47,46,46,0.15);
  outline: none;
  padding: 2.5rem;
  position: relative;
}

/* ── Error state ── */
.error {
  color: #b31b25;
  font-family: 'Inter', sans-serif;
  font-size: 0.875rem;
  padding: 1rem;
  background: #fff0f0;
  border-radius: 0.75rem;
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
  .char { opacity: 1; transform: none; }
}