/* ============================================================
   Benjamin Barron — Personal Portfolio
   ============================================================ */

/* === CUSTOM PROPERTIES === */
:root {
  --bg:           #F7F9FC;
  --white:        #FFFFFF;
  --accent:       #2E6FBA;
  --accent-dark:  #1E5291;
  --accent-light: #EBF3FB;
  --text:         #1B2A41;
  --muted:        #6B7F95;
  --line:         #E2E8F0;
  --card-bg:      #FFFFFF;
  --nav-h:        64px;

  --serif:  'Newsreader', Georgia, 'Times New Roman', serif;
  --sans:   'DM Sans', system-ui, -apple-system, sans-serif;

  --radius-card: 14px;
  --radius-btn:  999px;
  --shadow-card: 0 2px 16px rgba(27, 42, 65, 0.07), 0 1px 4px rgba(27, 42, 65, 0.04);
  --shadow-hover: 0 8px 32px rgba(27, 42, 65, 0.12), 0 2px 8px rgba(27, 42, 65, 0.06);

  --transition: 220ms ease;
}

/* === RESET === */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-h) + 16px);
}

body {
  font-family: var(--sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; }

a {
  color: inherit;
  text-decoration: none;
}

ul { list-style: none; }

/* === NAVIGATION === */
.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-h);
  background: rgba(247, 249, 252, 0.92);
  border-bottom: 1px solid transparent;
  backdrop-filter: blur(0px);
  transition: border-color var(--transition), backdrop-filter var(--transition), background var(--transition);
}

.site-nav.scrolled {
  border-bottom-color: var(--line);
  backdrop-filter: blur(12px);
  background: rgba(247, 249, 252, 0.88);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 32px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
}

.nav-logo {
  font-family: var(--serif);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
  letter-spacing: -0.01em;
  white-space: nowrap;
  flex-shrink: 0;
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 7px 14px;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 500;
  color: var(--muted);
  border-radius: var(--radius-btn);
  border: none;
  background: none;
  cursor: pointer;
  transition: color var(--transition), background var(--transition);
  white-space: nowrap;
}

.nav-link:hover {
  color: var(--text);
  background: rgba(27, 42, 65, 0.05);
}

.nav-cta {
  color: var(--accent);
  border: 1.5px solid var(--accent);
  padding: 6px 16px;
  font-weight: 600;
}

.nav-cta:hover {
  background: var(--accent);
  color: var(--white);
}

/* Dropdown */
.nav-dropdown-wrapper {
  position: relative;
}

.nav-dropdown-btn .caret {
  transition: transform var(--transition);
}

.nav-dropdown-btn[aria-expanded="true"] .caret {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  min-width: 240px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: 10px;
  box-shadow: var(--shadow-hover);
  padding: 6px;
  opacity: 0;
  visibility: hidden;
  transform: translateX(-50%) translateY(-6px);
  transition: opacity var(--transition), visibility var(--transition), transform var(--transition);
}

.nav-dropdown-wrapper:hover .dropdown-menu,
.dropdown-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateX(-50%) translateY(0);
}

.dropdown-item {
  display: block;
  padding: 9px 14px;
  font-size: 0.88rem;
  font-weight: 500;
  color: var(--muted);
  border-radius: 7px;
  transition: color var(--transition), background var(--transition);
}

.dropdown-item:hover {
  color: var(--accent);
  background: var(--accent-light);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 36px;
  height: 36px;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
  flex-shrink: 0;
}

.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s ease, opacity 0.3s ease;
  transform-origin: center;
}

.hamburger[aria-expanded="true"] span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}
.hamburger[aria-expanded="true"] span:nth-child(2) {
  opacity: 0;
  transform: scaleX(0);
}
.hamburger[aria-expanded="true"] span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* === HERO === */
.hero {
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: calc(var(--nav-h) + 40px) 24px 72px;
  position: relative;
  overflow: hidden;
}

/* Parallax photo layer */
.hero-bg {
  position: absolute;
  top: -25%;
  left: 0;
  right: 0;
  bottom: -25%;
  background-image: url('../images/coverphoto.jpeg');
  background-size: cover;
  background-position: center top;
  background-color: #B8CCE4;
  will-change: transform;
  z-index: 0;
}

/* White overlay over the parallax photo */
.hero::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255, 255, 255, 0.82);
  z-index: 1;
}

/* === HERO CARD === */
.hero-card {
  position: relative;
  z-index: 2;
  z-index: 2;
  width: 100%;
  max-width: 520px;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 20px 60px rgba(27, 42, 65, 0.18), 0 4px 16px rgba(27, 42, 65, 0.10);
}

/* Top block: #BFCFE6 with headshot */
.hero-card__photo {
  background: #BFCFE6;
  padding: 44px 32px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
}

.headshot-frame {
  position: relative;
  width: 148px;
  height: 148px;
  border-radius: 50%;
  overflow: hidden;
  border: 4px solid rgba(255, 255, 255, 0.7);
  background: rgba(255, 255, 255, 0.25);
  display: flex;
  align-items: center;
  justify-content: center;
}

.headshot-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center top;
  display: block;
}

/* Hide the real img when it fails to load; show placeholder instead */
.headshot-img[src=""],
.headshot-img:not([src]) {
  display: none;
}

.headshot-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

/* Hide placeholder once real image loads */
.headshot-img + .headshot-placeholder {
  display: none;
}

/* Bottom block: white with text */
.hero-card__text {
  background: var(--white);
  padding: 36px 40px 40px;
  text-align: center;
}

.hero-eyebrow {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  white-space: nowrap;
}

.hero-heading {
  font-family: var(--serif);
  font-size: clamp(2rem, 5vw, 2.6rem);
  font-weight: 400;
  line-height: 1.1;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 16px;
}

.hero-sub {
  font-size: 0.97rem;
  line-height: 1.8;
  color: var(--muted);
  margin-bottom: 32px;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  justify-content: center;
}

/* === BUTTONS === */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 13px 26px;
  font-family: var(--sans);
  font-size: 0.92rem;
  font-weight: 600;
  border-radius: var(--radius-btn);
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

.btn:hover {
  transform: translateY(-1px);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  border-color: var(--accent);
  box-shadow: 0 4px 14px rgba(46, 111, 186, 0.3);
}

.btn-primary:hover {
  background: var(--accent-dark);
  border-color: var(--accent-dark);
  box-shadow: 0 6px 20px rgba(46, 111, 186, 0.4);
}

.btn-outline {
  background: transparent;
  color: var(--text);
  border-color: var(--line);
}

.btn-outline:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-light);
}

/* Scroll arrow */
.scroll-arrow {
  position: absolute;
  z-index: 2;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  justify-content: center;
  width: 40px;
  height: 40px;
  color: var(--muted);
  border: 1px solid var(--line);
  border-radius: 50%;
  transition: color var(--transition), border-color var(--transition);
  animation: bounce 2.4s ease-in-out infinite;
}

.scroll-arrow:hover {
  color: var(--accent);
  border-color: var(--accent);
}

@keyframes bounce {
  0%, 100% { transform: translateX(-50%) translateY(0); }
  50%       { transform: translateX(-50%) translateY(7px); }
}

/* === SECTION SHARED STYLES === */
.section {
  padding: 96px 32px;
}

.section:nth-of-type(even) {
  background: var(--white);
}

.section-inner {
  max-width: 1100px;
  margin: 0 auto;
}

.section-header {
  margin-bottom: 56px;
}

.section-heading {
  font-family: var(--serif);
  font-size: clamp(2rem, 4vw, 2.8rem);
  font-weight: 400;
  letter-spacing: -0.025em;
  color: var(--text);
  margin-bottom: 14px;
}

.section-intro {
  font-size: 1.05rem;
  line-height: 1.8;
  color: var(--muted);
  max-width: 600px;
}

/* Divider between major sections */
.section + .section {
  border-top: 1px solid var(--line);
}

/* === PROJECT CARDS === */
.project-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.project-card {
  background: var(--card-bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  overflow: hidden;
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-hover);
}

.project-card__image {
  width: 100%;
  aspect-ratio: 16 / 10;
}

/* Per-card placeholder gradients */
.project-card__image--bio {
  background: linear-gradient(135deg, #CDDFF5 0%, #A8C7EC 50%, #C4DCF4 100%);
}
.project-card__image--epi {
  background: linear-gradient(135deg, #C4E8F5 0%, #9DD2EA 50%, #B8E2F3 100%);
}
.project-card__image--device {
  background: linear-gradient(135deg, #CDD5F0 0%, #A8B8E8 50%, #C0CCEE 100%);
}
.project-card__image--youtube {
  background: linear-gradient(135deg, #D0DEF5 0%, #B0C8EE 50%, #C8D8F4 100%);
}

.project-card__body {
  padding: 28px 30px 32px;
}

.project-card__title {
  font-family: var(--serif);
  font-size: 1.35rem;
  font-weight: 600;
  color: var(--text);
  margin-bottom: 12px;
  letter-spacing: -0.01em;
}

.project-card__desc {
  font-size: 0.95rem;
  line-height: 1.75;
  color: var(--muted);
  margin-bottom: 20px;
}

.project-card__link {
  display: inline-flex;
  align-items: center;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--accent);
  transition: gap var(--transition), opacity var(--transition);
  letter-spacing: 0.01em;
}

.project-card__link:hover {
  opacity: 0.75;
}

/* === COURSEWORK === */
.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.course-tile {
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 28px 26px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-card);
  box-shadow: var(--shadow-card);
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.course-tile:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-hover);
  border-color: rgba(46, 111, 186, 0.25);
}

.course-number {
  font-family: var(--serif);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--accent);
  letter-spacing: -0.01em;
}

.course-title {
  font-size: 0.97rem;
  font-weight: 500;
  color: var(--text);
  line-height: 1.4;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 6px;
}

.course-tag {
  display: inline-block;
  font-family: var(--sans);
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: var(--accent-light);
  border-radius: 999px;
  padding: 2px 8px;
}

.course-instructor {
  font-size: 0.84rem;
  color: var(--muted);
  font-style: italic;
  margin-top: 4px;
}

/* === CONTACT / FOOTER === */
.contact-section {
  background: var(--text) !important;
  border-top: none !important;
}

.contact-section .section-heading {
  color: var(--white);
}

.contact-inner {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 64px;
  flex-wrap: wrap;
}

.contact-list {
  display: flex;
  flex-direction: column;
  gap: 18px;
  margin-top: 36px;
}

.contact-list li {
  display: flex;
  flex-direction: column;
  gap: 3px;
}

.contact-label {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
}

.contact-list a,
.contact-list span:not(.contact-label) {
  font-size: 0.97rem;
  color: rgba(255, 255, 255, 0.85);
  transition: color var(--transition);
}

.contact-list a:hover {
  color: var(--white);
}

.contact-right {
  flex-shrink: 0;
}

.quick-links-heading {
  font-family: var(--serif);
  font-size: 1.1rem;
  font-weight: 400;
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 16px;
  margin-top: 36px;
}

.quick-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.quick-links a {
  font-size: 0.95rem;
  font-weight: 500;
  color: rgba(255, 255, 255, 0.75);
  transition: color var(--transition);
}

.quick-links a:hover {
  color: var(--white);
}

.footer-bar {
  max-width: 1100px;
  margin: 56px auto 0;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-copy {
  font-size: 0.84rem;
  color: rgba(255, 255, 255, 0.35);
}

/* === FADE-UP ANIMATION === */
.fade-up {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.65s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.65s cubic-bezier(0.22, 1, 0.36, 1);
}

.fade-up.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Stagger project cards and course tiles */
.project-grid .project-card:nth-child(1),
.course-grid .course-tile:nth-child(1) { transition-delay: 0s; }

.project-grid .project-card:nth-child(2),
.course-grid .course-tile:nth-child(2) { transition-delay: 0.08s; }

.project-grid .project-card:nth-child(3),
.course-grid .course-tile:nth-child(3) { transition-delay: 0.16s; }

.project-grid .project-card:nth-child(4) { transition-delay: 0.24s; }

/* === RESPONSIVE — TABLET (≤960px) === */
@media (max-width: 960px) {
  .project-grid {
    grid-template-columns: 1fr;
    max-width: 640px;
    margin: 0 auto;
  }

  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* === RESPONSIVE — MOBILE (≤720px) === */
@media (max-width: 720px) {
  .nav-inner {
    padding: 0 20px;
  }

  .nav-links {
    display: none;
    position: fixed;
    inset: var(--nav-h) 0 0 0;
    background: var(--white);
    flex-direction: column;
    align-items: flex-start;
    padding: 16px 20px 32px;
    gap: 4px;
    overflow-y: auto;
    border-top: 1px solid var(--line);
  }

  .nav-links.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    justify-content: flex-start;
    padding: 12px 14px;
    font-size: 1rem;
    color: var(--text);
  }

  .nav-cta {
    margin-top: 8px;
    border-width: 1.5px;
  }

  .nav-dropdown-wrapper {
    width: 100%;
  }

  .nav-dropdown-btn {
    width: 100%;
    justify-content: space-between;
  }

  .dropdown-menu {
    position: static;
    transform: none;
    box-shadow: none;
    border: none;
    background: var(--bg);
    border-radius: 8px;
    padding: 4px 0 4px 12px;
    margin-top: 4px;
    display: none;
  }

  .dropdown-menu.open {
    display: block;
    opacity: 1;
    visibility: visible;
  }

  .hamburger {
    display: flex;
  }

  .hero {
    padding: calc(var(--nav-h) + 24px) 16px 64px;
  }

  .hero-card__text {
    padding: 28px 24px 32px;
  }

  .hero-heading {
    font-size: clamp(2.8rem, 12vw, 3.8rem);
  }

  .section {
    padding: 64px 20px;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .contact-inner {
    gap: 0;
  }

  .contact-right {
    width: 100%;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }
}

/* === RESPONSIVE — SMALL MOBILE (≤400px) === */
@media (max-width: 400px) {
  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
  }

  .btn {
    width: 100%;
    justify-content: center;
  }
}