/* --- Variables --- */
:root {
  --max-width: 760px;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, sans-serif;
  --font-mono: ui-monospace, "SF Mono", Menlo, Monaco, "Cascadia Mono", monospace;
  /* Light, purple-accented palette */
  --text: #2d2a33;
  --text-muted: #5c5666;
  --bg: #faf8fc;
  --border: #e8e4ee;
  --card-bg: #ffffff;
  --accent: #7c5cbf;
  --accent-soft: #e8e2f2;
  --link: #6b4cb8;
  --link-visited: #8b6cc9;
  --focus-ring: 2px solid #7c5cbf;
}

@media (prefers-color-scheme: dark) {
  :root {
    --text: #ebe8f0;
    --text-muted: #a89fb8;
    --bg: #2a2633;
    --border: #454055;
    --card-bg: #352f42;
    --accent: #a78bfa;
    --accent-soft: #3d3550;
    --link: #c4b5fd;
    --link-visited: #a78bfa;
    --focus-ring: 2px solid #a78bfa;
  }
}

/* --- Scroll progress bar --- */
.scroll-progress {
  position: fixed;
  top: 0;
  left: 0;
  width: 0%;
  height: 3px;
  background: var(--accent);
  z-index: 1;
  transition: width 0.1s ease-out;
}

/* --- Scroll reveal --- */
.reveal {
  opacity: 0;
  transform: translateY(1rem);
  transition: opacity 0.5s ease-out, transform 0.5s ease-out;
}

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

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

html {
  font-size: 18px;
  line-height: 1.6;
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  padding: var(--space-xl) var(--space-lg);
  font-family: var(--font-sans);
  color: var(--text);
  background-color: var(--bg);
  background-image: radial-gradient(ellipse 120% 80% at 50% -20%, var(--accent-soft), transparent 60%);
  background-attachment: fixed;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
}

/* --- Typography --- */
h1 {
  font-size: 1.75rem;
  font-weight: 600;
  margin: 0 0 var(--space-md);
  letter-spacing: -0.02em;
}

h2 {
  font-size: 1.125rem;
  font-weight: 600;
  margin: 0 0 var(--space-md);
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

h2::before {
  content: "";
  display: inline-block;
  width: 4px;
  height: 1em;
  background: var(--accent-soft);
  border-radius: 2px;
  margin-right: var(--space-sm);
  vertical-align: -0.15em;
}

p {
  margin: 0 0 var(--space-md);
}

p:last-child {
  margin-bottom: 0;
}

ul {
  margin: 0 0 var(--space-md);
  padding-left: 1.25rem;
}

li {
  margin-bottom: var(--space-sm);
}

li:last-child {
  margin-bottom: 0;
}

/* --- Links --- */
a {
  color: var(--link);
  text-decoration: none;
}

a:visited {
  color: var(--link-visited);
}

a.link-accent,
a.link-accent:visited,
a.link-accent:hover {
  color: var(--accent);
}

a:hover {
  text-decoration: underline;
}

a:focus-visible {
  outline: var(--focus-ring);
  outline-offset: 2px;
}

/* --- Hero --- */
.hero {
  margin-bottom: 0;
  padding-bottom: var(--space-xl);
  border-bottom: 2px solid var(--accent);
}

.hero-subtext {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 36em;
}

/* --- Sections & cards --- */
.section,
.card {
  padding: var(--space-xl) 0;
  border-bottom: 1px solid var(--accent);
}

.section:last-of-type,
.card:last-of-type {
  border-bottom: none;
}

main > section:last-child {
  border-bottom: none;
}

.lede {
  font-size: 1rem;
  color: var(--text-muted);
  max-width: 36em;
  margin-bottom: var(--space-md);
}

/* --- Back link (sub-pages) --- */
.back {
  display: inline-block;
  font-size: 0.875rem;
  color: var(--text-muted);
  margin-bottom: var(--space-lg);
}

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

/* --- Stack (vertical list of cards) --- */
.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-xl);
}

.stack .card.update {
  padding: var(--space-xl);
  border: 1px solid var(--accent);
  border-radius: 10px;
  background: var(--card-bg);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.stack footer {
  margin-top: var(--space-2xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--accent);
}

/* --- Update cards (weekly log) --- */
.update__head {
  margin-bottom: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--accent);
}

.update__head h2 {
  margin-bottom: var(--space-xs);
}

.update__head h2::before {
  display: none;
}

.meta {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}

.update__list {
  list-style: none;
  padding-left: 0;
  margin: 0;
}

.update__list li {
  margin-bottom: var(--space-sm);
  padding-left: 0;
}

.update__list li:last-child {
  margin-bottom: 0;
}

/* --- Build log --- */
#build-log .build-log-fallback {
  margin-bottom: var(--space-md);
}

#iframe-wrapper {
  width: 100%;
  border: 1px solid var(--accent);
  border-radius: 10px;
  overflow: hidden;
  background: var(--card-bg);
  margin-bottom: var(--space-md);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

#iframe-wrapper iframe {
  display: block;
  width: 100%;
  height: 900px;
  border: none;
}

.embed-note {
  font-size: 0.875rem;
  color: var(--text-muted);
}

@media (max-width: 640px) {
  #iframe-wrapper iframe {
    height: 700px;
  }
}

/* --- Contact --- */
#contact p {
  margin-bottom: var(--space-sm);
}

#contact p:last-child {
  margin-bottom: 0;
}


/* --- Footer --- */
footer {
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--accent);
  text-align: center;
}

footer p {
  font-size: 0.875rem;
  color: var(--text-muted);
  margin: 0;
}