/* MechaRuby — Minimalist Editorial Stylesheet */

:root {
  /* Raw Light / Dark Palette Tokens */
  --bg-light: #fcfbf9;
  --bg-dark: #0c0d0f;

  --surface-light: #f3f1ed;
  --surface-dark: #15171b;

  --text-light: #121316;
  --text-dark: #f2f3f5;

  --muted-light: #52565e;
  --muted-dark: #9ba1ab;

  --border-light: #d6d3cd;
  --border-dark: #2c3038;

  /* Ruby Red Primary Brand Tokens */
  --ruby-light: #c8102e;
  --ruby-dark: #ff4757;

  --ruby-hover-light: #9e0b22;
  --ruby-hover-dark: #ff6b78;

  --ruby-tint-light: #fbe9ec;
  --ruby-tint-dark: #2b1115;

  --ruby-border-light: #e895a2;
  --ruby-border-dark: #7a202d;

  /* Terminal / Code Surface (Dark in both modes for crisp contrast) */
  --term-bg: #0d0e11;
  --term-header: #16181d;
  --term-border: #2a2e37;
  --term-text: #e6e8ec;
  --term-muted: #8b929e;
  --term-green: #3fb950;
  --term-red: #ff5c67;
  --term-purple: #c297ff;
  --term-cyan: #56d4dd;
  --term-yellow: #e3b341;

  /* Fallback assignments for browsers without light-dark() */
  --bg: var(--bg-light);
  --surface: var(--surface-light);
  --text: var(--text-light);
  --muted: var(--muted-light);
  --border: var(--border-light);
  --ruby: var(--ruby-light);
  --ruby-hover: var(--ruby-hover-light);
  --ruby-tint: var(--ruby-tint-light);
  --ruby-border: var(--ruby-border-light);

  @media (prefers-color-scheme: dark) {
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --text: var(--text-dark);
    --muted: var(--muted-dark);
    --border: var(--border-dark);
    --ruby: var(--ruby-dark);
    --ruby-hover: var(--ruby-hover-dark);
    --ruby-tint: var(--ruby-tint-dark);
    --ruby-border: var(--ruby-border-dark);
  }

  /* Explicit override fallbacks when <meta name="color-scheme"> is toggled */
  &:has(> head > meta[name="color-scheme"][content="dark"]) {
    color-scheme: dark;
    --bg: var(--bg-dark);
    --surface: var(--surface-dark);
    --text: var(--text-dark);
    --muted: var(--muted-dark);
    --border: var(--border-dark);
    --ruby: var(--ruby-dark);
    --ruby-hover: var(--ruby-hover-dark);
    --ruby-tint: var(--ruby-tint-dark);
    --ruby-border: var(--ruby-border-dark);
  }

  &:has(> head > meta[name="color-scheme"][content="light"]) {
    color-scheme: light;
    --bg: var(--bg-light);
    --surface: var(--surface-light);
    --text: var(--text-light);
    --muted: var(--muted-light);
    --border: var(--border-light);
    --ruby: var(--ruby-light);
    --ruby-hover: var(--ruby-hover-light);
    --ruby-tint: var(--ruby-tint-light);
    --ruby-border: var(--ruby-border-light);
  }

  @supports (color: light-dark(white, black)) {
    --bg: light-dark(var(--bg-light), var(--bg-dark));
    --surface: light-dark(var(--surface-light), var(--surface-dark));
    --text: light-dark(var(--text-light), var(--text-dark));
    --muted: light-dark(var(--muted-light), var(--muted-dark));
    --border: light-dark(var(--border-light), var(--border-dark));
    --ruby: light-dark(var(--ruby-light), var(--ruby-dark));
    --ruby-hover: light-dark(var(--ruby-hover-light), var(--ruby-hover-dark));
    --ruby-tint: light-dark(var(--ruby-tint-light), var(--ruby-tint-dark));
    --ruby-border: light-dark(var(--ruby-border-light), var(--ruby-border-dark));
  }

  /* MANDATORY: Automatically adapt native UI to user system preferences */
  color-scheme: light dark;
  accent-color: var(--ruby);

  /* Typography Stacks */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-heading: "Chakra Petch", var(--font-sans);
  --font-body: "Atkinson Hyperlegible", var(--font-sans);
  --font-mono: "SFMono-Regular", "JetBrains Mono", Consolas, "Liberation Mono", Menlo, monospace;
}

@media (forced-colors: active) {
  :root {
    --bg: Canvas;
    --surface: Canvas;
    --text: CanvasText;
    --muted: GrayText;
    --border: CanvasText;
    --ruby: LinkText;
    --ruby-border: Highlight;
  }
}

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

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

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
}

body {
  margin: 0;
  background-color: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-size-adjust: from-font;
  font-size: clamp(1.0625rem, 1rem + 0.25vw, 1.1875rem);
  line-height: 1.65;
  text-align: start;
  overflow-wrap: break-word;
  border-top: 4px solid var(--ruby);
}

::selection {
  background-color: var(--ruby);
  color: #ffffff;
}

/* Typography Rules */
h1,
h2,
h3,
h4,
.brand {
  font-family: var(--font-heading);
}

h1,
h2,
h3,
h4 {
  color: var(--text);
  font-weight: 700;
  font-size-adjust: cap-height from-font;
  letter-spacing: -0.01em;
  line-height: 1.15;
  text-wrap: balance;
  margin-top: 0;
}

p,
li,
blockquote {
  text-wrap: pretty;
}

p {
  margin-top: 0;
  margin-bottom: 1.35rem;
  max-width: 68ch;
}

a {
  color: var(--ruby);
  text-decoration: underline;
  text-decoration-thickness: 1.5px;
  text-underline-offset: 0.2em;
  transition: color 0.15s ease;
}

a:hover,
a:focus-visible {
  color: var(--ruby-hover);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  background-color: var(--surface);
  border: 1px solid var(--border);
  padding: 0.15em 0.38em;
  border-radius: 4px;
}

pre code {
  background: none;
  border: none;
  padding: 0;
  font-size: inherit;
  color: inherit;
}

/* Layout Containers */
.container {
  width: 100%;
  max-width: 66rem;
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

.prose-container {
  max-width: 46rem;
}

/* Top Navigation Bar */
.site-header {
  padding-block: 1.5rem;
  border-bottom: 1px solid var(--border);
}

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

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 700;
  font-size: 2.55rem;
  line-height: 1;
  letter-spacing: -0.015em;
  color: var(--text);
  text-decoration: none;
}

.brand:hover {
  color: var(--ruby);
}

.brand-mascot {
  width: 2.5rem;
  height: 2.5rem;
  object-fit: contain;
  image-rendering: pixelated;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

.site-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 1.25rem;
}

.site-nav a {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--muted);
  text-decoration: none;
  font-weight: 600;
}

.site-nav a:hover,
.site-nav a:focus-visible {
  color: var(--ruby);
  text-decoration: underline;
}

.theme-toggle {
  appearance: none;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 6px;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.theme-toggle:hover,
.theme-toggle:focus-visible {
  border-color: var(--ruby);
  color: var(--ruby);
}

.theme-toggle svg {
  width: 1.1rem;
  height: 1.1rem;
  fill: currentColor;
}

.theme-toggle .icon-sun {
  display: none;
}

.theme-toggle .icon-moon {
  display: block;
}

@media (prefers-color-scheme: dark) {
  .theme-toggle:not([data-rendered-scheme="light"]) .icon-sun {
    display: block;
  }
  .theme-toggle:not([data-rendered-scheme="light"]) .icon-moon {
    display: none;
  }
}

.theme-toggle[data-rendered-scheme="dark"] .icon-sun {
  display: block;
}

.theme-toggle[data-rendered-scheme="dark"] .icon-moon {
  display: none;
}

/* Hero Section */
.hero {
  position: relative;
  overflow: hidden;
  padding-block: clamp(3.5rem, 8vw, 6rem) clamp(2.5rem, 5vw, 4rem);
  border-bottom: 1px solid var(--border);
}

.hero-grid {
  position: relative;
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

.hero-copy {
  position: relative;
  z-index: 2;
}

/* Mobile: Dwarf sits centered behind the text, darkened so text stays crisp */
.hero-mascot-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.hero-mascot {
  width: clamp(17rem, 72vw, 23rem);
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  image-rendering: pixelated;
  transform: none;
  opacity: 0.34;
  filter: brightness(0.68) contrast(1.08);
}

/* Desktop: Dwarf sits in the right column, large and prominent relative to text */
@media (min-width: 54rem) {
  .hero-grid {
    grid-template-columns: 1fr auto;
    gap: 3rem;
  }

  .hero-mascot-wrap {
    position: static;
    inset: auto;
    justify-content: center;
    pointer-events: auto;
  }

  .hero-mascot {
    width: clamp(20rem, 30vw, 26rem);
    transform: none;
    opacity: 1;
    filter: drop-shadow(0 16px 36px rgba(0, 0, 0, 0.28));
  }
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.825rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--ruby);
  margin-bottom: 1.25rem;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 0.55rem;
  height: 0.55rem;
  background-color: var(--ruby);
  transform: rotate(45deg);
}

.hero h1 {
  font-size: clamp(2.35rem, 1.5rem + 4vw, 4.15rem);
  max-width: 18ch;
  margin-bottom: 1.5rem;
}

.hero h1 .ruby-accent {
  color: var(--ruby);
}

.hero-lede {
  font-size: clamp(1.2rem, 1.05rem + 0.6vw, 1.45rem);
  line-height: 1.5;
  color: var(--muted);
  max-width: 56ch;
  margin-bottom: 2rem;
}

.pill-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.pill-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.875rem;
  font-weight: 600;
  text-decoration: none;
  padding: 0.55rem 0.95rem;
  border-radius: 6px;
  background-color: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  transition: border-color 0.15s ease, background-color 0.15s ease;
}

.pill-link:hover,
.pill-link:focus-visible {
  border-color: var(--ruby);
  color: var(--ruby);
  background-color: var(--ruby-tint);
}

.pill-link .dot {
  width: 0.45rem;
  height: 0.45rem;
  border-radius: 50%;
  background-color: var(--ruby);
}

/* Philosophy Section */
.philosophy {
  padding-block: clamp(3rem, 6vw, 5rem);
  border-bottom: 1px solid var(--border);
}

.philosophy-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
}

@media (min-width: 54rem) {
  .philosophy-grid {
    grid-template-columns: 18rem 1fr;
    gap: 3.5rem;
  }
}

.philosophy-sidebar h2 {
  font-size: clamp(1.5rem, 1.2rem + 1vw, 2rem);
  margin-bottom: 0.75rem;
}

.philosophy-sidebar p {
  color: var(--muted);
  font-size: 0.95rem;
}

.philosophy-body p {
  font-size: clamp(1.08rem, 1rem + 0.3vw, 1.22rem);
  line-height: 1.7;
}

.philosophy-body p strong {
  color: var(--text);
  font-weight: 700;
}

.philosophy-callout {
  margin-block: 2rem;
  padding: 1.25rem 1.5rem;
  border-left: 4px solid var(--ruby);
  background-color: var(--ruby-tint);
  border-radius: 0 6px 6px 0;
}

.philosophy-callout p {
  margin: 0;
  font-weight: 600;
  color: var(--text);
}

/* Core Pattern Trio (3 Pillars) */
.pillars {
  padding-block: clamp(3rem, 6vw, 4.5rem);
  border-bottom: 1px solid var(--border);
}

.pillars-header {
  margin-bottom: 2.5rem;
}

.pillars-header h2 {
  font-size: clamp(1.75rem, 1.35rem + 1.5vw, 2.5rem);
  margin-bottom: 0.5rem;
}

.pillars-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(18rem, 1fr));
  gap: 1.5rem;
}

.pillar-card {
  background-color: var(--surface);
  border: 1px solid var(--border);
  border-top: 3px solid var(--ruby);
  border-radius: 6px;
  padding: 1.5rem;
}

.pillar-num {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--ruby);
  display: block;
  margin-bottom: 0.5rem;
}

.pillar-card h3 {
  font-size: 1.2rem;
  margin-bottom: 0.65rem;
}

.pillar-card p {
  font-size: 0.975rem;
  color: var(--muted);
  margin-bottom: 0;
}

/* Tool Showcase Sections */
.tool-section {
  padding-block: clamp(3.5rem, 7vw, 5.5rem);
  border-bottom: 1px solid var(--border);
}

.tool-header {
  display: flex;
  flex-wrap: wrap;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.tool-title-group {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.tool-name {
  font-family: var(--font-mono);
  font-size: clamp(1.65rem, 1.3rem + 1.5vw, 2.35rem);
  font-weight: 800;
  color: var(--text);
  margin: 0;
}

.tool-name a {
  color: inherit;
  text-decoration: none;
}

.tool-name a:hover,
.tool-name a:focus-visible {
  color: var(--ruby);
  text-decoration: underline;
}

.tool-badge {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
  padding: 0.3rem 0.7rem;
  border-radius: 4px;
  background-color: var(--ruby-tint);
  color: var(--ruby);
  border: 1px solid var(--ruby-border);
  text-decoration: none;
  transition: background-color 0.15s ease, border-color 0.15s ease, color 0.15s ease;
}

.tool-repo-link:hover,
.tool-repo-link:focus-visible {
  background-color: var(--ruby);
  border-color: var(--ruby);
  color: #ffffff;
}

.tool-thesis {
  font-size: clamp(1.25rem, 1.1rem + 0.5vw, 1.55rem);
  font-weight: 700;
  line-height: 1.35;
  margin-bottom: 1.25rem;
  max-width: 52ch;
}

/* Tool Hero Grid (Title, Thesis & Gem Mascot) */
.tool-hero-grid {
  position: relative;
  overflow: hidden;
  display: grid;
  grid-template-columns: 1fr;
  align-items: center;
  margin-bottom: 2rem;
}

.tool-hero-copy {
  position: relative;
  z-index: 2;
}

.tool-hero-copy .tool-thesis {
  margin-bottom: 0;
}

/* Mobile: Gem Mascot sits centered behind the tool title and thesis, darkened so text remains crisp */
.tool-mascot-wrap {
  position: absolute;
  inset: 0;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  pointer-events: none;
}

.tool-mascot {
  width: clamp(12rem, 50vw, 15rem);
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: contain;
  image-rendering: pixelated;
  transform: none;
  opacity: 0.26;
  filter: brightness(0.68) contrast(1.08);
}

/* Desktop: Gem Mascot stands to the side in the right column, matching hero pattern */
@media (min-width: 54rem) {
  .tool-hero-grid {
    grid-template-columns: 1fr auto;
    gap: 2.5rem;
  }

  .tool-mascot-wrap {
    position: static;
    inset: auto;
    justify-content: center;
    pointer-events: auto;
  }

  .tool-mascot {
    width: clamp(8.5rem, 12vw, 11rem);
    transform: none;
    opacity: 1;
    filter: drop-shadow(0 12px 28px rgba(0, 0, 0, 0.25));
  }
}

.tool-split {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2rem;
  margin-top: 2rem;
  align-items: start;
}

@media (min-width: 58rem) {
  .tool-split {
    grid-template-columns: 1fr 1.15fr;
    gap: 2.5rem;
  }
}

.tool-points {
  list-style: none;
  padding: 0;
  margin: 1.5rem 0 0 0;
  display: grid;
  gap: 1rem;
}

.tool-points li {
  position: relative;
  padding-left: 1.35rem;
  font-size: 1rem;
}

.tool-points li::before {
  content: "■";
  position: absolute;
  left: 0;
  top: 0.05em;
  color: var(--ruby);
  font-size: 0.75em;
}

/* Code & Terminal Windows */
.code-stack {
  display: grid;
  gap: 1.25rem;
}

.code-window {
  color-scheme: dark;
  accent-color: var(--ruby);
  background-color: var(--term-bg);
  border: 1px solid var(--term-border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.14);
}

.code-bar {
  background-color: var(--term-header);
  border-bottom: 1px solid var(--term-border);
  padding: 0.55rem 0.9rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 0.775rem;
  color: var(--term-muted);
}

.code-bar-tag {
  color: var(--term-red);
  font-weight: 600;
}

.code-window pre {
  margin: 0;
  padding: 1.1rem 1.25rem;
  overflow-x: auto;
  font-family: var(--font-mono);
  font-size: 0.84rem;
  line-height: 1.6;
  color: var(--term-text);
  tab-size: 2;
}

/* Terminal Syntax Highlights */
.t-comment { color: var(--term-muted); }
.t-key     { color: var(--term-cyan); }
.t-str     { color: var(--term-green); }
.t-bool    { color: var(--term-purple); font-weight: 600; }
.t-kw      { color: var(--term-red); font-weight: 600; }
.t-ok      { color: var(--term-green); font-weight: 700; }
.t-err     { color: var(--term-red); font-weight: 700; }
.t-warn    { color: var(--term-yellow); font-weight: 600; }

/* Footer */
.site-footer {
  padding-block: 3.5rem;
  color: var(--muted);
  font-size: 0.925rem;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
}

.footer-inner p {
  margin: 0;
}

.footer-meta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.85rem;
}

.site-version {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 600;
  padding: 0.15rem 0.5rem;
  border-radius: 4px;
  background-color: var(--surface);
  border: 1px solid var(--border);
  color: var(--muted);
}