/* ============================================================
   CUSTOM PROPERTIES
   ============================================================ */
:root {
  --color-bg:           #F8F5EF;
  --color-card:         #FFFFFF;
  --color-text:         #1A1A1A;
  --color-text-muted:   #666666;
  --color-accent:       #9EC5E8;
  --color-accent-dark:  #5A9BD4;
  --color-border:       #E8E4DD;

  --font-serif: 'IBM Plex Serif', Georgia, serif;
  --font-sans:  'IBM Plex Sans', system-ui, -apple-system, sans-serif;
  --font-mono:  'IBM Plex Mono', 'Courier New', monospace;
}

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

/* ============================================================
   BASE
   ============================================================ */
html {
  font-size: 17px;
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg);
  color: var(--color-text);
  font-family: var(--font-sans);
  font-weight: 400;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ============================================================
   STICKY HEADER
   ============================================================ */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
}

.site-nav {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 32px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  color: var(--color-text);
  text-decoration: none;
  white-space: nowrap;
  flex-shrink: 0;
  letter-spacing: 0.01em;
  transition: color 150ms ease;
}

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

/* tabs centered between name and icons */
.nav-tabs {
  display: flex;
  gap: 4px;
  flex: 1;
  justify-content: center;
}

.nav-tab {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-text-muted);
  text-decoration: none;
  padding: 8px 14px;
  border-bottom: 3px solid transparent;
  transition: color 150ms ease, border-color 150ms ease;
}

.nav-tab:hover {
  color: var(--color-text);
}

.nav-tab.active {
  color: var(--color-text);
  border-bottom-color: var(--color-accent);
}

.nav-icons {
  display: flex;
  gap: 16px;
  align-items: center;
  flex-shrink: 0;
}

.icon-link {
  color: var(--color-text);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 6px;
  border-radius: 50%;
  transition: color 150ms ease, background-color 150ms ease;
}

.icon-link:hover {
  color: var(--color-text);
  background-color: rgba(158, 197, 232, 0.22);
}

/* ============================================================
   MAIN
   ============================================================ */
.site-main {
  flex: 1;
}

/* ============================================================
   TAB PANELS
   ============================================================ */
.tab-panel {
  display: none;
}

.tab-panel.active {
  display: block;
  animation: tabFadeIn 150ms ease forwards;
}

@keyframes tabFadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

/* ============================================================
   CONTENT WRAPPER (Writing / Projects / About)
   ============================================================ */
.content-wrap {
  max-width: 880px;
  margin: 0 auto;
  padding: 64px 32px 80px;
}

/* ============================================================
   HOME TAB — full-width baby blue band at top
   ============================================================ */
#panel-home {
  background: linear-gradient(
    to bottom,
    rgba(158, 197, 232, 0.38) 0%,
    rgba(158, 197, 232, 0.34) 30%,
    rgba(158, 197, 232, 0.08) 60%,
    transparent 80%
  );
}

/* ============================================================
   PROJECTS TAB — baby blue tint section background
   ============================================================ */
#panel-projects {
  background-color: rgba(158, 197, 232, 0.13);
}

/* ============================================================
   HERO (Home tab)
   ============================================================ */
.hero {
  max-width: 920px;
  margin: 0 auto;
  padding: 88px 40px 80px;
}

.hero-layout {
  display: flex;
  flex-direction: row;
  gap: 60px;
  align-items: center;
}

/* Portrait placeholder circle */
.hero-portrait {
  flex-shrink: 0;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  border: 3px solid var(--color-accent);
  overflow: hidden;
  position: relative;
  background-image: url('assets/portrait.jpg');
  background-repeat: no-repeat;
  background-size: 160%;          /* zoom — increase % to zoom in more */
  background-position: center 5%; /* framing — increase % to pull face down */
}

.hero-portrait-img {
  /* Visually hidden; kept in DOM for screen-reader alt text */
  position: absolute;
  width: 1px;
  height: 1px;
  margin: -1px;
  padding: 0;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* Text content block (right of portrait on desktop) */
.hero-content {
  flex: 1;
  min-width: 0;
  text-align: left;
}

.hero-name {
  font-family: var(--font-serif);
  font-weight: 700;
  font-size: clamp(42px, 6vw, 62px);
  color: var(--color-text);
  line-height: 1.08;
  letter-spacing: -0.5px;
  margin-bottom: 18px;
}

.hero-subtitle {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 18px;
  color: var(--color-text-muted);
  margin-bottom: 22px;
  line-height: 1.55;
}

.hero-bio {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  margin-bottom: 36px;
}

.hero-ctas {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  justify-content: flex-start;
  margin-bottom: 32px;
}

.hero-icons {
  display: flex;
  gap: 4px;
  align-items: center;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-block;
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: 0.01em;
  padding: 12px 26px;
  border-radius: 4px;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  transition: background-color 150ms ease, border-color 150ms ease, color 150ms ease;
  white-space: nowrap;
}

.btn-primary {
  background-color: var(--color-accent);
  color: var(--color-text);
  border-color: var(--color-accent);
}

.btn-primary:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  color: #fff;
}

.btn-secondary {
  background-color: var(--color-card);
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover {
  border-color: var(--color-accent);
  color: var(--color-accent-dark);
}

/* ============================================================
   SECTION HEADINGS (Writing / Projects / About tabs)
   ============================================================ */
.section-heading {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: clamp(28px, 4vw, 36px);
  color: var(--color-text);
  line-height: 1.2;
  margin-bottom: 10px;
}

.section-heading::after {
  content: '';
  display: block;
  width: 36px;
  height: 3px;
  background-color: var(--color-accent);
  margin-top: 10px;
  border-radius: 2px;
}

.section-intro {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  color: var(--color-text-muted);
  margin-bottom: 48px;
}

/* ============================================================
   ARTICLE CARDS
   ============================================================ */
.article-list {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.article-card {
  background-color: rgba(158, 197, 232, 0.09);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 28px 32px;
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.article-card:hover {
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.07), 0 0 0 1px var(--color-accent);
  border-color: var(--color-accent);
}

.article-title {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 21px;
  color: var(--color-text);
  line-height: 1.35;
  margin-bottom: 8px;
}

.article-meta {
  font-family: var(--font-mono);
  font-weight: 400;
  font-size: 13px;
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.article-desc {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  margin-bottom: 16px;
}

.article-link {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 14px;
  color: var(--color-accent-dark);
  text-decoration: none;
  transition: color 150ms ease;
}

.article-link:hover {
  color: var(--color-accent);
}

/* ============================================================
   PROJECT CARDS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 20px;
}

.project-card {
  background-color: rgba(255, 255, 255, 0.70);
  border: 1px solid var(--color-border);
  border-radius: 6px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.project-card:hover {
  box-shadow: 0 4px 18px rgba(0, 0, 0, 0.07), 0 0 0 1px var(--color-accent);
  border-color: var(--color-accent);
}

.project-name {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 21px;
  color: var(--color-text);
  margin-bottom: 8px;
}

.project-tagline {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
  font-style: italic;
  margin-bottom: 14px;
}

.project-desc {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 15px;
  line-height: 1.65;
  color: var(--color-text);
  flex: 1;
  margin-bottom: 24px;
}

.project-actions {
  display: flex;
  gap: 10px;
}

/* ============================================================
   ABOUT TAB
   ============================================================ */
.about-bio {
  font-size: 17px;
  line-height: 1.7;
  color: var(--color-text);
  max-width: 720px;
  margin-bottom: 52px;
}

.about-section {
  margin-bottom: 44px;
}

.about-section-heading {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 18px;
  color: var(--color-text);
  padding-bottom: 10px;
  border-bottom: 1px solid var(--color-border);
  margin-bottom: 4px;
}

.info-table {
  display: flex;
  flex-direction: column;
}

.info-row {
  display: flex;
  gap: 40px;
  padding: 14px 0;
  border-bottom: 1px solid var(--color-border);
  align-items: baseline;
}

.info-label {
  font-family: var(--font-sans);
  font-weight: 600;
  font-size: 14px;
  color: var(--color-text);
  flex: 0 0 220px;
  min-width: 0;
}

.info-value {
  font-family: var(--font-sans);
  font-weight: 400;
  font-size: 14px;
  color: var(--color-text-muted);
  line-height: 1.5;
}

.contact-link {
  color: var(--color-accent-dark);
  text-decoration: none;
  font-weight: 500;
  font-size: 14px;
  transition: color 150ms ease;
}

.contact-link:hover {
  color: var(--color-accent);
}

/* ============================================================
   OUTSIDE OF WORK LIST (About tab)
   ============================================================ */
.outside-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.outside-list li {
  position: relative;
  padding: 10px 0 10px 20px;
  font-family: var(--font-sans);
  font-size: 15px;
  color: var(--color-text);
  line-height: 1.5;
  border-bottom: 1px solid var(--color-border);
}

.outside-list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 18px;
  width: 5px;
  height: 5px;
  background-color: var(--color-accent);
  border-radius: 50%;
}

/* ============================================================
   FOOTER
   ============================================================ */
.site-footer {
  background-color: var(--color-accent);
  border-top: none;
  padding: 28px 32px;
  text-align: center;
}

.footer-text {
  font-family: var(--font-sans);
  font-weight: 500;
  font-size: 13px;
  color: var(--color-text);
}

/* ============================================================
   RESPONSIVE — tablet / nav collapse
   ============================================================ */
@media (max-width: 860px) {
  .site-nav {
    gap: 16px;
    padding: 0 20px;
  }
}

/* hide nav name so tabs + icons fit on medium screens */
@media (max-width: 640px) {
  .nav-name {
    display: none;
  }

  .site-nav {
    padding: 0 16px;
    height: 56px;
    gap: 0;
    justify-content: space-between;
  }

  .nav-tabs {
    flex: 1;
    gap: 0;
  }

  .nav-tab {
    padding: 8px 10px;
    font-size: 13px;
  }

  .nav-icons {
    gap: 12px;
  }
}

/* ============================================================
   RESPONSIVE — mobile single column (768px breakpoint)
   ============================================================ */
@media (max-width: 768px) {
  /* hero: portrait stacks above content */
  .hero {
    padding: 56px 20px 56px;
  }

  .hero-layout {
    flex-direction: column;
    align-items: center;
    gap: 36px;
    text-align: center;
  }

  .hero-content {
    text-align: center;
  }

  .hero-portrait {
    width: 180px;
    height: 180px;
  }

  .hero-subtitle {
    font-size: 17px;
  }

  .hero-ctas {
    flex-direction: column;
    align-items: stretch;
    width: 100%;
    max-width: 280px;
    margin-left: auto;
    margin-right: auto;
  }

  .hero-icons {
    justify-content: center;
  }

  .btn {
    text-align: center;
  }

  .content-wrap {
    padding: 44px 20px 64px;
  }

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

  .info-row {
    flex-direction: column;
    gap: 2px;
    padding: 12px 0;
  }

  .info-label {
    flex: none;
  }

  .article-card,
  .project-card {
    padding: 22px 20px;
  }
}

/* ============================================================
   RESPONSIVE — small mobile
   ============================================================ */
@media (max-width: 400px) {
  /* hide nav icons; they're still in the hero */
  .nav-icons {
    display: none;
  }

  .nav-tabs {
    justify-content: space-around;
  }

  .nav-tab {
    padding: 8px 8px;
    font-size: 13px;
  }
}