/* ---------- Theme ---------- */
:root {
  --bg: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(17, 24, 39, 0.12);
  --card: rgba(255, 255, 255, 0.92);
  --shadow: 0 10px 28px rgba(17, 24, 39, 0.08);
  --link: #1d4ed8;
  --link-hover: #1e40af;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b1220;
    --text: #e5e7eb;
    --muted: #9ca3af;
    --border: rgba(255, 255, 255, 0.14);
    --card: rgba(255, 255, 255, 0.04);
    --shadow: 0 14px 40px rgba(0, 0, 0, 0.35);
    --link: #93c5fd;
    --link-hover: #bfdbfe;
  }
}

/* ---------- Base ---------- */
*,
*::before,
*::after { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
  max-width: 860px;
  margin: 2.2rem auto;
  padding: 0 1.1rem;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.65;
  font-size: 16px;
  color: var(--text);
  background:
    radial-gradient(900px 450px at 15% 0%, rgba(29, 78, 216, 0.10), transparent 60%),
    radial-gradient(800px 420px at 95% 5%, rgba(16, 185, 129, 0.08), transparent 55%),
    var(--bg);
}

a {
  color: var(--link);
  text-decoration-thickness: 1px;
  text-underline-offset: 0.18em;
}
a:hover { color: var(--link-hover); }

a:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--link) 60%, transparent);
  outline-offset: 3px;
  border-radius: 6px;
}

/* ---------- Header / Nav ---------- */
header {
  padding: 1rem 1.1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

header h1 {
  margin: 0;
  letter-spacing: -0.02em;
  font-size: 1.6rem;
  line-height: 1.2;
}

nav {
  margin-top: 0.5rem;
  font-size: 0.98rem;
  color: var(--muted);
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
  align-items: center;
}

nav a {
  color: var(--text);
  text-decoration: none;
  padding: 0.25rem 0.55rem;
  border: 1px solid transparent;
  border-radius: 999px;
}

nav a:hover {
  border-color: var(--border);
  background: color-mix(in srgb, var(--card) 85%, transparent);
}

/* ---------- Separator ---------- */
hr {
  border: 0;
  height: 1px;
  background: var(--border);
  margin: 1.4rem 0;
}

/* ---------- Sections as cards ---------- */
main section {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
  padding: 1.1rem 1.1rem;
  margin: 1rem 0;
}

h2 {
  margin: 0 0 0.6rem;
  font-size: 1.15rem;
  letter-spacing: -0.01em;
}

p {
  margin: 0.6rem 0;
  color: color-mix(in srgb, var(--text) 92%, var(--muted));
}

/* Lists */
ul {
  padding-left: 1.1rem;
  margin: 0.6rem 0 0;
}
li { margin: 0.35rem 0; }

/* ---------- Footer ---------- */
footer {
  margin-top: 1.6rem;
  color: var(--muted);
  font-size: 0.92rem;
  text-align: center;
}

/* ---------- HERO (About + photo) ---------- */
/* Goal: photo vertically centered with text block */
.hero {
  display: grid;
  grid-template-columns: minmax(0, 1fr) 210px; /* text | photo */
  gap: 1.4rem;
  align-items: center; /* <-- centers photo w.r.t. text block */
}

.hero-text { min-width: 0; }
.hero-text h2 { margin-top: 0; }

.hero-media {
  justify-self: end;
  display: flex;
  align-items: center;   /* vertically centers the image within its column */
  justify-content: center;
}

.profile-pic {
  display: block;        /* remove baseline gap */
  width: 210px;
  height: 210px;
  border-radius: 18px;
  object-fit: cover;
  border: 1px solid var(--border);
  background: color-mix(in srgb, var(--card) 85%, transparent);
}

/* ---------- Responsive ---------- */
@media (max-width: 700px) {
  body { margin: 1.2rem auto; }

  header { padding: 0.9rem; }

  /* Stack and center the image */
  .hero {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .hero-media {
    order: -1;            /* image above text (delete if you want image below) */
    justify-self: center; /* center horizontally */
    margin-bottom: 0.6rem;
  }

  .profile-pic {
    width: 140px;
    height: 140px;
  }
}