:root {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #555555;
  --accent: #0b6cff;
  --accent-2: #0e7c66;
  --maxw: 760px;
  --space: 22px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0b0b0b;
    --fg: #f3f3f3;
    --muted: #a0a0a0;
    --accent: #6aa7ff;
    --accent-2: #37cf9c;
  }
}

/* Manual theme override via data-theme attribute */
:root[data-theme='light'] {
  --bg: #ffffff;
  --fg: #111111;
  --muted: #555555;
  --accent: #0b6cff;
  --accent-2: #0e7c66;
}

:root[data-theme='dark'] {
  --bg: #0b0b0b;
  --fg: #f3f3f3;
  --muted: #a0a0a0;
  --accent: #6aa7ff;
  --accent-2: #37cf9c;
}

html { box-sizing: border-box; scroll-behavior: smooth; }
*, *::before, *::after { box-sizing: inherit; }

body {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Inter, Arial, sans-serif;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

.wrap {
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 48px 22px 80px;
}

header { margin: 18vh 0 10vh; position: relative; }

/* Soft gradient blob behind the header for visual interest */
.hero-blob::before {
  content: "";
  position: absolute;
  top: -20%;
  left: -10%;
  width: 120%;
  height: 320px;
  background:
    radial-gradient(40% 50% at 25% 30%, color-mix(in oklab, var(--accent) 70%, transparent) 0%, transparent 70%),
    radial-gradient(40% 50% at 70% 30%, color-mix(in oklab, var(--accent-2) 70%, transparent) 0%, transparent 70%);
  filter: blur(60px);
  opacity: 0.25;
  pointer-events: none;
  z-index: -1;
}

h1 {
  font-size: clamp(32px, 6vw, 52px);
  line-height: 1.2;
  margin: 0 0 12px;
  letter-spacing: -0.005em;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

/* Subtle animated gradient for the main heading */
.gradient-text {
  background: linear-gradient(90deg, var(--fg), var(--accent), var(--accent-2));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  -webkit-text-fill-color: transparent; /* prevents glyph clipping in some browsers */
  display: inline-block; /* avoids line-box clipping */
  padding: 4px 0; /* tiny vertical padding to avoid visual crop on glyphs like Y */
  text-shadow: 0 0 0 rgba(0,0,0,0); /* nudge rasterization on some browsers */
}

@media (prefers-reduced-motion: no-preference) {
  .gradient-text {
    background-size: 200% 100%;
    transition: background-position 600ms ease;
  }
  .gradient-text:hover {
    background-position: 100% 0;
  }
}

.tagline {
  color: var(--muted);
  font-size: clamp(16px, 2.8vw, 20px);
  margin: 0 0 8px;
}

.meta { color: var(--muted); font-size: 14px; }

section { margin: 56px 0; }

h2 {
  font-size: clamp(20px, 3.2vw, 24px);
  margin: 0 0 14px;
  letter-spacing: -0.01em;
  display: inline-block;
  background-image: linear-gradient(currentColor, currentColor);
  background-repeat: no-repeat;
  background-size: 0 2px;
  background-position: 0 100%;
  transition: background-size 300ms ease;
}

h2:hover { background-size: 100% 2px; }

p { margin: 12px 0; }

ul { margin: 10px 0 10px 22px; padding: 0; }

/* Accent-colored list markers */
ul li::marker { color: var(--accent); }

li { margin: 8px 0; }

hr {
  border: none;
  height: 1px;
  background: linear-gradient(to right, transparent, rgba(127,127,127,0.25), transparent);
  margin: 32px 0;
}

a {
  color: var(--accent);
  text-decoration: underline;
  text-underline-offset: 2px;
  text-decoration-thickness: 1.5px;
}

a:hover { color: var(--accent-2); }

.muted { color: var(--muted); }

.pill {
  display: inline-block;
  padding: 2px 10px;
  border: 1px solid rgba(127,127,127,0.35);
  border-radius: 999px;
  font-size: 12px;
  color: var(--muted);
  margin-right: 8px;
}

footer { margin-top: 72px; color: var(--muted); font-size: 14px; }

/* Reveal-on-scroll animation */
.reveal { opacity: 0; transform: translateY(16px); transition: opacity 600ms ease, transform 600ms ease; }
.reveal.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
  .reveal { opacity: 1; transform: none; }
}

/* Theme toggle button */
.theme-toggle {
  position: fixed;
  top: 16px;
  right: 16px;
  z-index: 999;
  background: rgba(127,127,127,0.08);
  color: var(--fg);
  border: 1px solid rgba(127,127,127,0.35);
  border-radius: 999px;
  padding: 6px 10px;
  cursor: pointer;
  backdrop-filter: blur(6px);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.theme-toggle:hover { background: rgba(127,127,127,0.15); }
.theme-toggle:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }

.theme-toggle .icon { font-size: 18px; width: 18px; height: 18px; display: none; line-height: 1; }
:root[data-theme='light'] .theme-toggle .icon--sun { display: inline-block; }
:root[data-theme='dark'] .theme-toggle .icon--moon { display: inline-block; }



/* Back to top button */
/* Removed back-to-top, copy button, sr-only as per request */

/* Selection color */
::selection {
  background: color-mix(in oklab, var(--accent) 85%, transparent);
  color: #fff;
}