/* Design tokens. Every color below is themed — never hardcode a hex in a rule
   or in a page's markup, or dark mode will miss it. */
:root {
  --bg: #ffffff;
  --surface: #ffffff;
  --surface-alt: #f7f8fa;
  --text: #111827;
  --muted: #5b6472;
  --border: #e5e7eb;
  --accent: #b10202;
  --accent-hover: #8e0202;
  --accent-on: #ffffff;
  --accent-soft: rgba(177, 2, 2, 0.08);
  --container: 1100px;
  --radius: 10px;
  --shadow: 0 6px 20px rgba(16, 24, 40, 0.06);
  --shadow-lift: 0 14px 30px rgba(16, 24, 40, 0.14);
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1216;
    --surface: #171b21;
    --surface-alt: #1d222a;
    --text: #e8eaed;
    --muted: #a2acba;
    --border: #2b323b;
    /* The brand red fails contrast on a dark background, so dark mode uses a
       lightened tint and flips button text to dark. */
    --accent: #ff6a60;
    --accent-hover: #ff8a82;
    --accent-on: #230705;
    --accent-soft: rgba(255, 106, 96, 0.14);
    --shadow: 0 6px 20px rgba(0, 0, 0, 0.45);
    --shadow-lift: 0 14px 30px rgba(0, 0, 0, 0.6);
  }
}

* { box-sizing: border-box }

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

img { max-width: 100% }

a { color: var(--accent) }

:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 2px;
  border-radius: 4px;
}

/* layout */
.container { max-width: var(--container); margin: 0 auto; padding: 1rem }

/* header */
.site-header {
  border-bottom: 3px solid var(--accent);
  background: var(--bg);
  position: sticky;
  top: 0;
  z-index: 10;
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
  padding-block: 0.6rem;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  text-decoration: none;
  min-width: 0;
}

.brand-logo { height: 52px; width: auto; display: block }

.brand-name { font-size: 1.15rem; font-weight: 700; line-height: 1.2 }

.brand-tag {
  display: block;
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--muted);
}

.nav { list-style: none; padding: 0; margin: 0; display: flex; gap: 0.25rem; flex-wrap: wrap }

.nav a {
  display: block;
  text-decoration: none;
  color: var(--muted);
  padding: 0.45rem 0.7rem;
  border-radius: 6px;
}

.nav a:hover { color: var(--text); background: var(--surface-alt) }

.nav a[aria-current="page"] { color: var(--accent); font-weight: 600 }

/* Hamburger: hidden until the breakpoint below swaps it in. */
.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 44px;
  height: 44px;
  padding: 0 10px;
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 8px;
  cursor: pointer;
}

.nav-toggle span {
  display: block;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.2s ease, opacity 0.2s ease;
}

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

/* hero */
.hero { display: flex; gap: 2.5rem; align-items: center; padding: 2.5rem 0 }

.hero-text { flex: 1 1 340px }

.hero-text h1 { margin: 0 0 0.75rem 0; font-size: clamp(1.9rem, 4vw, 2.6rem); line-height: 1.15 }

.hero-text p { margin: 0 0 1.25rem 0; max-width: 60ch }

.hero-image { flex: 0 0 auto }

.hero-image img {
  width: min(340px, 60vw);
  aspect-ratio: 1;
  object-fit: cover;
  border-radius: 50%;
  border: 5px solid var(--accent);
  display: block;
}

.hero-actions { display: flex; flex-wrap: wrap; gap: 0.6rem; align-items: center }

/* buttons */
.btn {
  display: inline-block;
  background: var(--accent);
  color: var(--accent-on);
  padding: 0.6rem 1.1rem;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  border: 1px solid var(--accent);
  transition: background 0.15s ease, transform 0.15s ease;
}

.btn:hover { background: var(--accent-hover); border-color: var(--accent-hover); transform: translateY(-1px) }

.btn.ghost { background: transparent; color: var(--accent) }

.btn.ghost:hover { background: var(--accent-soft); transform: translateY(-1px) }

/* visit counter */
.visit-counter {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  margin-top: 1.25rem;
  font-size: 0.9rem;
  color: var(--muted);
}

.visit-counter button {
  font: inherit;
  color: var(--muted);
  background: transparent;
  border: 1px solid var(--border);
  border-radius: 999px;
  padding: 0.25rem 0.75rem;
  cursor: pointer;
}

.visit-counter button:hover:not(:disabled) { color: var(--text); border-color: var(--muted) }

.visit-counter button:disabled { opacity: 0.5; cursor: default }

/* grids */
.grid { display: grid; gap: 1.25rem }
.projects-grid { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)) }
.highlights-grid { grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)) }

/* cards */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

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

/* aspect-ratio keeps every screenshot cropped identically regardless of source size */
.card img { display: block; width: 100%; aspect-ratio: 16 / 9; object-fit: cover }

.card-body { padding: 1rem; display: flex; flex-direction: column; gap: 0.6rem }

/* Card headings differ by page (h3 on the index, h2 on the projects page where
   each card is a top-level entry), so style both to look identical. */
.card-body h2, .card-body h3 { margin: 0; font-size: 1.05rem }

.card-body h2 a, .card-body h3 a { text-decoration: none }

.card-body h2 a:hover, .card-body h3 a:hover { text-decoration: underline }

.card-body p { margin: 0; color: var(--muted); font-size: 0.95rem }

.card-link { font-size: 0.9rem; word-break: break-word }

/* tech pills */
.tags { display: flex; flex-wrap: wrap; gap: 0.4rem; list-style: none; padding: 0; margin: 0 }

.tags li {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--accent);
  background: var(--accent-soft);
  border: 1px solid var(--accent-soft);
  border-radius: 999px;
  padding: 0.15rem 0.6rem;
}

.wip {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
}

.card progress { width: 100%; height: 8px }

/* highlights */
.highlights { padding: 1rem 0 }

.highlight {
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-left: 4px solid var(--accent);
  border-radius: var(--radius);
  padding: 1.1rem;
}

.highlight h3 { margin: 0 0 0.35rem 0; font-size: 1.05rem }

.highlight p { margin: 0; color: var(--muted); font-size: 0.95rem }

.highlight .meta { display: block; margin-bottom: 0.5rem }

/* sections */
section { margin-bottom: 2.5rem }

h2 { font-size: 1.6rem; margin: 0 0 1rem 0 }

/* about */
.about-images {
  display: flex;
  flex-direction: row;
  justify-content: center;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  margin-bottom: 1.5rem;
}

.about-images img {
  border-radius: 15%;
  width: 300px;
  aspect-ratio: 1;
  object-fit: cover;
  display: block;
}

.about-section p {
  font-size: 1.05rem;
  line-height: 1.7;
  max-width: 70ch;
  margin: 0 auto 1.25rem auto;
}

/* posts */
.post-list { padding-left: 0; list-style: none; display: grid; gap: 1rem }

.post-list li {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  transition: transform 0.18s ease, box-shadow 0.18s ease;
}

.post-list li:hover { transform: translateY(-3px); box-shadow: var(--shadow) }

.post-list a { font-weight: 600; font-size: 1.05rem; text-decoration: none }

.post-list a:hover { text-decoration: underline }

.post-list p { margin: 0.35rem 0 0 0; color: var(--muted); font-size: 0.95rem }

/* contact */
.contact {
  padding: 1.5rem;
  background: var(--surface-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}

.contact h2 { margin-top: 0 }

/* footer */
.site-footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.9rem;
}

/* code block */
pre { background: #0f172a; color: #e6eef8; padding: 1rem; border-radius: 6px; overflow: auto }

code { font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, "Roboto Mono", "Courier New", monospace }

.meta { color: var(--muted); font-size: 0.9rem }

/* responsive */
@media (max-width: 760px) {
  .nav-toggle { display: flex }

  .site-nav {
    flex-basis: 100%;
    display: none;
  }

  .site-nav.is-open { display: block }

  .nav { flex-direction: column; gap: 0; padding-bottom: 0.5rem }

  .nav a { padding: 0.7rem 0.5rem; border-bottom: 1px solid var(--border) }

  .brand-logo { height: 40px }

  .brand-name { font-size: 1rem }

  .hero { flex-direction: column-reverse; text-align: center; gap: 1.5rem; padding: 1.5rem 0 }

  .hero-text p { margin-inline: auto }

  .hero-actions, .visit-counter { justify-content: center }

  .about-images img { width: 200px }

  .about-section p { font-size: 1rem }
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important }
  .card:hover, .post-list li:hover, .btn:hover { transform: none }
}