/* ════════════════════════════════════════════
   PORTFOLIO — Dr. Amara Osei
   Theme: Royal Blue & White · Refined Editorial
   ════════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --blue:       #1a2f6e;   /* deep royal blue */
  --blue-dark:  #111e4d;
  --blue-mid:   #243a8a;
  --blue-light: #2e4fb5;
  --blue-faint: #eef1fa;
  --white:      #ffffff;
  --off-white:  #f7f8fc;
  --text:       #1a1d2e;
  --muted:      #5a6180;
  --border:     #d6daf0;
  --accent:     #c8a84b;   /* gold accent for contrast */

  --font-display: 'Cormorant Garamond', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;

  --radius:   12px;
  --radius-lg:20px;
  --shadow:   0 4px 24px rgba(26,47,110,.10);
  --shadow-lg:0 12px 48px rgba(26,47,110,.16);

  --transition: 0.35s cubic-bezier(.4,0,.2,1);
  --nav-h: 72px;
}

/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.7;
  overflow-x: hidden;
}
img { display: block; width: 100%; object-fit: cover; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }

/* ── Containers ── */
.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Section rhythm ── */
section {
  padding: 100px 0;
}
.alt-bg {
  background: var(--blue-faint);
}

/* ════════════ NAV ════════════ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
#navbar.scrolled { box-shadow: var(--shadow); }
.nav-inner {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 2rem;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.nav-logo {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--blue);
  letter-spacing: -.02em;
}
.dot { color: var(--accent); }
.nav-links {
  display: flex;
  align-items: center;
  gap: 2.4rem;
}
.nav-links a {
  font-size: .875rem;
  font-weight: 500;
  color: var(--muted);
  letter-spacing: .02em;
  transition: color var(--transition);
}
.nav-links a:hover { color: var(--blue); }
.nav-cta {
  background: var(--blue) !important;
  color: var(--white) !important;
  padding: .55rem 1.4rem !important;
  border-radius: 100px !important;
  transition: background var(--transition), transform var(--transition) !important;
}
.nav-cta:hover { background: var(--blue-light) !important; transform: translateY(-1px); }

/* Burger */
.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--blue);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ════════════ HERO ════════════ */
#hero {
  min-height: 100vh;
  background: var(--blue-dark);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: calc(var(--nav-h) + 40px) 2rem 80px;
  text-align: center;
}
.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,.04) 1px, transparent 1px);
  background-size: 60px 60px;
}
.hero-bg-grid::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 60% at 50% 40%, rgba(46,79,181,.35) 0%, transparent 70%);
}
.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}
.hero-eyebrow {
  font-size: .8rem;
  font-weight: 500;
  letter-spacing: .22em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.4rem;
}
.hero-name {
  font-family: var(--font-display);
  font-size: clamp(3.4rem, 9vw, 7.2rem);
  font-weight: 300;
  line-height: 1.0;
  color: var(--white);
  letter-spacing: -.02em;
  margin-bottom: 1.6rem;
}
.hero-name em {
  font-style: italic;
  color: var(--accent);
}
.hero-tagline {
  font-size: 1.05rem;
  font-weight: 300;
  color: rgba(255,255,255,.65);
  line-height: 1.8;
  margin-bottom: 2.8rem;
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Buttons */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--white);
  color: var(--blue-dark);
  font-weight: 500;
  font-size: .9rem;
  padding: .8rem 2rem;
  border-radius: 100px;
  transition: transform var(--transition), box-shadow var(--transition);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 24px rgba(0,0,0,.25); }
.btn-primary.full { width: 100%; justify-content: center; background: var(--blue); color: var(--white); }
.btn-primary.full:hover { background: var(--blue-light); box-shadow: var(--shadow); }
.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  border: 1.5px solid rgba(255,255,255,.35);
  color: rgba(255,255,255,.85);
  font-size: .9rem;
  font-weight: 400;
  padding: .78rem 1.8rem;
  border-radius: 100px;
  transition: border-color var(--transition), background var(--transition);
}
.btn-ghost:hover { border-color: rgba(255,255,255,.7); background: rgba(255,255,255,.08); }

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: .6rem;
  color: rgba(255,255,255,.35);
  font-size: .7rem;
  letter-spacing: .15em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, rgba(255,255,255,.35), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%,100% { opacity: .4; transform: scaleY(1); }
  50% { opacity: 1; transform: scaleY(1.1); }
}

/* ════════════ ABOUT ════════════ */
#about { padding-top: calc(var(--nav-h) + 60px); }
.about-grid {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 5rem;
  align-items: stretch;
}
.about-image-wrap { position: relative; display: flex; flex-direction: column; }
.img-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  flex: 1;
  min-height: 480px;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.img-frame::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  box-shadow: inset 0 0 0 1.5px rgba(26,47,110,.1);
}
.about-social {
  margin-top: 1.4rem;
  display: flex;
  justify-content: center;
}
.social-pill {
  display: inline-flex;
  align-items: center;
  gap: .55rem;
  background: var(--blue-faint);
  color: var(--blue);
  font-size: .82rem;
  font-weight: 500;
  padding: .6rem 1.2rem;
  border-radius: 100px;
  border: 1.5px solid var(--border);
  transition: background var(--transition), border-color var(--transition);
}
.social-pill:hover { background: var(--blue); color: var(--white); border-color: var(--blue); }
.social-pill.mt { margin-top: 1.6rem; }

/* Profile image fill */
.img-frame img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: top center;
  display: block;
}
.section-label {
  font-size: .72rem;
  font-weight: 600;
  letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: 1rem;
}
.about-text h2, .section-header h2, .contact-info h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 400;
  line-height: 1.15;
  color: var(--blue-dark);
  margin-bottom: 1.4rem;
  letter-spacing: -.01em;
}
.contact-info h2 em, .hero-name em { font-style: italic; color: var(--accent); }
.about-text p, .contact-info p { color: var(--muted); margin-bottom: 1rem; font-size: .95rem; }
.about-stats {
  display: flex;
  gap: 2.5rem;
  margin-top: 2.2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.stat-num {
  display: block;
  font-family: var(--font-display);
  font-size: 2.4rem;
  font-weight: 600;
  color: var(--blue);
  line-height: 1;
}
.stat-label {
  display: block;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .08em;
  text-transform: uppercase;
  color: var(--muted);
  margin-top: .35rem;
}

/* ════════════ CARDS (Publications & Projects) ════════════ */
.section-header {
  text-align: center;
  margin-bottom: 4rem;
}
.card-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.pub-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  transition: transform var(--transition), box-shadow var(--transition);
}
.pub-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.card-img-wrap {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
  background: var(--blue-faint);
}
.card-img-wrap img {
  transition: transform .6s ease;
  height: 100%;
}
.pub-card:hover .card-img-wrap img { transform: scale(1.05); }
.card-tag {
  position: absolute;
  top: 1rem; left: 1rem;
  background: var(--blue-dark);
  color: var(--white);
  font-size: .68rem;
  font-weight: 600;
  letter-spacing: .1em;
  text-transform: uppercase;
  padding: .3rem .8rem;
  border-radius: 100px;
}
.card-body {
  padding: 1.6rem;
  flex: 1;
  display: flex;
  flex-direction: column;
}
.card-body h3 {
  font-family: var(--font-display);
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--blue-dark);
  line-height: 1.35;
  margin-bottom: .9rem;
}
.card-body p {
  font-size: .875rem;
  color: var(--muted);
  line-height: 1.75;
  flex: 1;
}
.card-meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.4rem;
  padding-top: 1rem;
  border-top: 1px solid var(--border);
  font-size: .78rem;
  font-weight: 500;
  color: var(--muted);
}
.read-link {
  color: var(--blue-light);
  font-weight: 500;
  transition: color var(--transition);
}
.read-link:hover { color: var(--blue-dark); }

/* ════════════ AWARDS ════════════ */
.awards-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}
.award-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow);
  border: 1px solid var(--border);
  transition: transform var(--transition), box-shadow var(--transition);
}
.award-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); }
.award-img-wrap {
  aspect-ratio: 16/7;
  overflow: hidden;
}
.award-img-wrap img { transition: transform .6s ease; height: 100%; }
.award-card:hover .award-img-wrap img { transform: scale(1.06); }
.award-body { padding: 1.5rem; }
.award-year {
  display: inline-block;
  font-size: .7rem;
  font-weight: 600;
  letter-spacing: .18em;
  text-transform: uppercase;
  color: var(--blue-light);
  margin-bottom: .7rem;
  background: var(--blue-faint);
  padding: .25rem .7rem;
  border-radius: 100px;
}
.award-body h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--blue-dark);
  line-height: 1.35;
  margin-bottom: .7rem;
}
.award-body p { font-size: .85rem; color: var(--muted); line-height: 1.7; }

/* ════════════ CONTACT ════════════ */
#contact { background: var(--white); }
.contact-wrap {
  display: grid;
  grid-template-columns: 420px 1fr;
  gap: 6rem;
  align-items: start;
}
.contact-info { padding-top: 1rem; }

/* Form */
.contact-form {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow);
}
.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: .45rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: .78rem;
  font-weight: 600;
  letter-spacing: .06em;
  text-transform: uppercase;
  color: var(--muted);
}
.form-group input,
.form-group select,
.form-group textarea {
  font-family: var(--font-body);
  font-size: .9rem;
  color: var(--text);
  background: var(--off-white);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  padding: .75rem 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  outline: none;
  resize: none;
  appearance: none;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  border-color: var(--blue-light);
  box-shadow: 0 0 0 3px rgba(46,79,181,.12);
  background: var(--white);
}
.form-note {
  margin-top: 1rem;
  font-size: .82rem;
  text-align: center;
  color: var(--blue-light);
  min-height: 1.2rem;
}

/* ════════════ FOOTER ════════════ */
footer {
  background: var(--blue-dark);
  padding: 2.2rem 0;
}
.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
}
footer .nav-logo { color: var(--white); }
footer p { font-size: .8rem; color: rgba(255,255,255,.45); }
footer a { color: rgba(255,255,255,.55); transition: color var(--transition); }
footer a:hover { color: var(--white); }

/* ════════════ REVEAL ANIMATION ════════════ */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity .65s cubic-bezier(.4,0,.2,1), transform .65s cubic-bezier(.4,0,.2,1);
}
.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ════════════ CAROUSEL ════════════ */
.carousel-wrapper {
  position: relative;
  width: 100%;
}

.carousel-track-container {
  overflow: hidden;
  border-radius: var(--radius-lg);
}

.carousel-track {
  display: flex;
  gap: 2rem;
  transition: transform 0.5s cubic-bezier(.4,0,.2,1);
  will-change: transform;
  align-items: stretch;
}

/* Slides default to 3-up */
.carousel-slide {
  flex: 0 0 calc((100% - 4rem) / 3);
  min-width: 0;
}

/* Awards carousel shows 3-up by default too */
#awards-carousel .carousel-slide {
  flex: 0 0 calc((100% - 4rem) / 3);
}

/* Carousel controls */
.carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1.2rem;
  margin-top: 2.2rem;
}

.carousel-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--white);
  border: 1.5px solid var(--border);
  color: var(--blue);
  box-shadow: var(--shadow);
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  flex-shrink: 0;
}

.carousel-btn:hover {
  background: var(--blue);
  color: var(--white);
  border-color: var(--blue);
  transform: scale(1.08);
  box-shadow: var(--shadow-lg);
}

.carousel-btn:disabled {
  opacity: 0.35;
  pointer-events: none;
}

/* Alt-bg sections: give btn a light blue bg */
.alt-bg .carousel-btn {
  background: var(--white);
}

/* Dots */
.carousel-dots {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.carousel-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--border);
  transition: background var(--transition), transform var(--transition), width var(--transition);
  cursor: pointer;
  border: none;
  padding: 0;
  flex-shrink: 0;
}

.carousel-dot.active {
  background: var(--blue);
  width: 22px;
  border-radius: 4px;
}

/* ════════════ RESPONSIVE ════════════ */
@media (max-width: 1024px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
  .awards-grid { grid-template-columns: repeat(2, 1fr); }
  .about-grid { grid-template-columns: 280px 1fr; gap: 3rem; }
  .contact-wrap { grid-template-columns: 1fr; gap: 3rem; }

  /* Carousel: 2 slides visible */
  .carousel-slide {
    flex: 0 0 calc((100% - 2rem) / 2);
  }
  #awards-carousel .carousel-slide {
    flex: 0 0 calc((100% - 2rem) / 2);
  }
}

@media (max-width: 768px) {
  section { padding: 70px 0; }
  .card-grid, .awards-grid { grid-template-columns: 1fr; }
  .about-grid { grid-template-columns: 1fr; }
  .about-image-wrap { max-width: 320px; margin: 0 auto; }
  .img-frame { aspect-ratio: unset; min-height: 360px; }
  .form-row { grid-template-columns: 1fr; }
  .about-stats { gap: 1.5rem; }
  .contact-form { padding: 1.8rem; }

  /* Carousel: 1 slide visible */
  .carousel-slide {
    flex: 0 0 100%;
  }
  #awards-carousel .carousel-slide {
    flex: 0 0 100%;
  }
  .carousel-track { gap: 0; }

  /* Mobile nav */
  .burger { display: flex; }
  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: var(--white);
    flex-direction: column;
    padding: 2rem;
    gap: 1.6rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%);
    transition: transform var(--transition);
    z-index: 999;
  }
  .nav-links.open { transform: translateY(0); }
  .nav-links a { font-size: 1rem; color: var(--text); }
  .nav-cta { display: inline-block; text-align: center; }
  .footer-inner { justify-content: center; text-align: center; }
}

@media (max-width: 480px) {
  .hero-actions { flex-direction: column; align-items: center; }
  .btn-primary, .btn-ghost { width: 100%; justify-content: center; }
  .about-stats { flex-wrap: wrap; gap: 1.2rem; }
}