/* Shared base: theme tokens, reset, background, header/nav, socials, and
   every component reused across pages (page-hero, card, btn, tag, content
   layout, callouts, code blocks, reveal/spotlight/toggle hooks).
   Page-specific rules live in each page's inline <style>. */
:root{
  --bg: #0b0c10;
  --panel: rgba(20, 21, 28, 0.68);
  --header-bg: rgba(8, 8, 14, 0.55);
  --text: #e8e9ed;
  --muted: #9aa0ad;

  --line: rgba(255,255,255,0.08);
  --line2: rgba(255,255,255,0.14);

  --accent: #6e8bfa;
  --accent-2: #4f6fe0;

  --radius: 14px;
  --shadow: 0 8px 24px rgba(0,0,0,.28);
  --shadow-hover: 0 14px 34px rgba(0,0,0,.35);

  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
}

:root[data-theme="light"]{
  --bg: #f6f6fa;
  --panel: rgba(255, 255, 255, 0.78);
  --header-bg: rgba(255, 255, 255, 0.68);
  --text: #14151b;
  --muted: #5b606f;

  --line: rgba(20,20,35,0.09);
  --line2: rgba(20,20,35,0.15);

  --accent: #3d5cd6;
  --accent-2: #2f47b3;

  --shadow: 0 6px 20px rgba(20,20,45,.06);
  --shadow-hover: 0 10px 28px rgba(20,20,45,.10);
}

*{ box-sizing:border-box; }
html, body { height:100%; }

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background:
    radial-gradient(1000px 560px at 50% -12%, color-mix(in srgb, var(--text) 6%, transparent), transparent 62%),
    var(--bg);
  color: var(--text);
  overflow-x:hidden;
}

header{
  position: sticky;
  top: 0;
  z-index: 10;
  background: var(--header-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
}

.wrap{
  max-width: 980px;
  margin: 0 auto;
  padding: 14px 18px;
}

.nav-container{
  position: relative;
  display:flex;
  justify-content:center;
  align-items:center;
  gap: 12px;
  min-height: 44px;
}

.links{
  display:flex;
  gap: 10px;
  align-items:center;
  flex-wrap: wrap;
  justify-content:center;
}

.links a{
  color: var(--text);
  text-decoration:none;
  padding: 8px 12px;
  border-radius: 12px;
  border: 1px solid transparent;
  opacity: .85;
}

.links a:hover{
  opacity: 1;
  border-color: var(--line2);
  background: rgba(255,255,255,.04);
}

.links a.active{
  opacity: 1;
  border-color: color-mix(in srgb, var(--accent) 30%, transparent);
  background: color-mix(in srgb, var(--accent) 9%, transparent);
}

.socials{
  position:absolute;
  right:0;
  display:flex;
  gap: 10px;
  align-items:center;
}

.socials a{
  text-decoration:none;
  color: var(--muted);
  font-size: 14px;
  padding: 6px 10px;
  border-radius: 10px;
  border: 1px solid transparent;
  transition: all .15s ease;
  white-space: nowrap;
}

.socials a:hover{
  color: var(--text);
  border-color: color-mix(in srgb, var(--accent) 28%, transparent);
  background: color-mix(in srgb, var(--accent) 7%, transparent);
  transform: translateY(-1px);
}

/* Shared nav icon buttons (theme toggle, game toggle) */
.icon-btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  border: 1px solid var(--line2);
  background: rgba(255,255,255,.03);
  color: var(--muted);
  cursor: pointer;
  flex: 0 0 auto;
  transition: transform .12s ease, border-color .12s ease, color .12s ease;
}

.icon-btn:hover{
  color: var(--text);
  border-color: color-mix(in srgb, var(--text) 25%, var(--line2));
  transform: translateY(-1px);
}

.icon-btn svg{ width: 16px; height: 16px; }
#themeToggle .icon-moon{ display:none; }
#themeToggle .icon-sun{ display:block; }
:root[data-theme="light"] #themeToggle .icon-moon{ display:block; }
:root[data-theme="light"] #themeToggle .icon-sun{ display:none; }

@media (max-width: 520px){
  .socials{
    position: static;
    justify-content:center;
    margin-top: 8px;
  }
  .nav-container{
    flex-direction: column;
    align-items:center;
  }
}

footer{
  margin-top: 12px;
  color: var(--muted);
  font-size: 13px;
  text-align:center;
}

/* ---------------------------------------------------------------------
   Shared components (page-hero, card, btn, tag, content layout, code)
   --------------------------------------------------------------------- */

.page-hero, .card{
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  box-shadow: var(--shadow);
  overflow: hidden;
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease;
}

.page-hero{
  border-radius: calc(var(--radius) + 6px);
  padding: 22px;
}

.card{
  border-radius: var(--radius);
  padding: 18px;
  display:flex;
  flex-direction: column;
  gap: 10px;
}

.card:hover{
  transform: translateY(-2px);
  border-color: color-mix(in srgb, var(--text) 22%, var(--line));
  box-shadow: var(--shadow-hover);
}

/* Cursor-follow spotlight, positioned by --mx/--my (set via JS on pointermove) */
.page-hero::after, .card::after{
  content:"";
  position:absolute;
  inset:0;
  z-index:0;
  border-radius: inherit;
  background: radial-gradient(260px circle at var(--mx,50%) var(--my,50%), color-mix(in srgb, var(--text) 10%, transparent), transparent 72%);
  opacity:0;
  transition: opacity .3s ease;
  pointer-events:none;
}

.page-hero:hover::after, .card:hover::after{ opacity: 1; }

.page-hero > *, .card > *{ position:relative; z-index:1; }

h1{
  margin: 0 0 6px;
  font-size: clamp(30px, 3.2vw, 44px);
  letter-spacing: -0.6px;
  line-height: 1.12;
}

.card h2{
  margin: 0;
  font-size: 18px;
  letter-spacing: .2px;
  scroll-margin-top: 96px;
}

.card h3{
  margin: 18px 0 8px;
  font-size: 15px;
  letter-spacing: .2px;
  color: var(--text);
}

.card p{
  margin: 0;
  color: var(--muted);
  line-height: 1.65;
  font-size: 14px;
}

.card ul{
  margin: 10px 0 0;
  padding-left: 18px;
  line-height: 1.9;
  color: var(--muted);
}

.grid{
  display:grid;
  gap: 14px;
}

.meta, .tags{
  display:flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items:center;
}

.meta{ color: var(--muted); font-size: 12px; }

.tag{
  border: 1px solid var(--line);
  background: rgba(255,255,255,.03);
  padding: 4px 8px;
  border-radius: 999px;
  color: var(--muted);
  font-size: 12px;
}

.meta-row, .postmeta{
  display:flex;
  justify-content: space-between;
  align-items:flex-start;
  gap: 12px;
  flex-wrap: wrap;
  margin-top: 12px;
  color: var(--muted);
  font-size: 12px;
}

.actions{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 4px;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  padding: 10px 14px;
  border-radius: 12px;
  text-decoration:none;
  color: var(--text);
  border: 1px solid var(--line2);
  background: rgba(255,255,255,.03);
  transition: transform .15s ease, border-color .15s ease, box-shadow .15s ease, background .15s ease;
  font-size: 13px;
}

.btn:hover{
  transform: translateY(-1px);
  border-color: color-mix(in srgb, var(--text) 25%, var(--line2));
  box-shadow: var(--shadow-hover);
}

.btn.primary{
  border-color: color-mix(in srgb, var(--accent) 45%, var(--line2));
  background: linear-gradient(135deg, color-mix(in srgb, var(--accent) 20%, transparent), color-mix(in srgb, var(--accent-2) 20%, transparent));
  color: var(--text);
}

.btn.primary:hover{
  border-color: color-mix(in srgb, var(--accent) 65%, var(--line2));
  box-shadow: 0 0 0 1px color-mix(in srgb, var(--accent) 20%, transparent) inset, var(--shadow-hover);
}

.btn.disabled{
  cursor: not-allowed;
  opacity: .55;
  pointer-events: none;
}

/* Writeup content layout */
.content{
  display:grid;
  grid-template-columns: 1fr 320px;
  gap: 14px;
  align-items:start;
}

@media (max-width: 920px){
  .content{ grid-template-columns: 1fr; }
  .side{ position: static; }
}

.side{
  position: sticky;
  top: 86px;
  display:flex;
  flex-direction: column;
  gap: 14px;
}

.side .btn{ width: 100%; }

.toc a{
  display:block;
  color: var(--muted);
  text-decoration:none;
  padding: 8px 10px;
  border-radius: 12px;
  border: 1px solid transparent;
}

.toc a:hover{
  color: var(--text);
  border-color: var(--line2);
  background: rgba(255,255,255,.04);
}

.callout{
  border-left: 3px solid color-mix(in srgb, var(--text) 35%, transparent);
  background: color-mix(in srgb, var(--text) 5%, transparent);
  padding: 12px;
  border-radius: 12px;
  margin-top: 12px;
}

pre{
  margin: 12px 0 0;
  padding: 14px;
  border-radius: 14px;
  border: 1px solid var(--line);
  background: color-mix(in srgb, var(--bg) 70%, black 10%);
  overflow:auto;
  box-shadow: var(--shadow);
}

code, pre{
  font-family: var(--font-mono);
  font-size: 13px;
}

code{ color: var(--text); background: color-mix(in srgb, var(--text) 8%, transparent); padding: 2px 5px; border-radius: 4px; }
pre code{ color: var(--text); background: none; padding: 0; }

/* "Focus right now" style list — flat rows instead of glowing pill/dot badges */
.now-list{
  display:flex;
  flex-direction: column;
  margin-top: 6px;
}

.now-row{
  display:flex;
  align-items:flex-start;
  gap: 12px;
  padding: 12px 2px;
  border-top: 1px solid var(--line);
}

.now-row:first-child{ border-top: none; padding-top: 2px; }

.now-row .bar{
  width: 3px;
  align-self: stretch;
  min-height: 22px;
  border-radius: 999px;
  background: color-mix(in srgb, var(--text) 55%, transparent);
  flex: 0 0 auto;
}

.now-row .now-text{
  color: var(--muted);
  font-size: 14px;
  line-height: 1.6;
}

.now-row .now-text b{
  color: var(--text);
  font-weight: 650;
}

/* Scroll-reveal (JS adds data-reveal to elements, then .is-visible on intersect) */
[data-reveal]{
  opacity: 0;
  transform: translateY(16px);
  transition: opacity .5s ease, transform .5s ease;
}

[data-reveal].is-visible{
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce){
  [data-reveal]{ transition:none; opacity:1; transform:none; }
  .page-hero::after, .card::after{ transition:none; }
  .card:hover{ transform:none; }
}