/* ==========================================================================
   Uday BKV — site stylesheet
   "Paper & Ink": warm paper, deep ink, one electric-blue pen.
   Plain CSS, no build step. Tokens first; everything else reads from them.
   ========================================================================== */

/* ---------- 0. Fonts (self-hosted, SIL OFL — see /assets/fonts/OFL.txt) -- */
@font-face { font-family: "Instrument Serif"; font-style: normal; font-weight: 400; font-display: swap; src: url("../fonts/instrument-serif-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Instrument Serif"; font-style: italic; font-weight: 400; font-display: swap; src: url("../fonts/instrument-serif-latin-400-italic.woff2") format("woff2"); }
@font-face { font-family: "Geist"; font-style: normal; font-weight: 100 900; font-display: swap; src: url("../fonts/geist-latin-wght-normal.woff2") format("woff2-variations"), url("../fonts/geist-latin-wght-normal.woff2") format("woff2"); }
@font-face { font-family: "Geist Mono"; font-style: normal; font-weight: 400; font-display: swap; src: url("../fonts/geist-mono-latin-400-normal.woff2") format("woff2"); }
@font-face { font-family: "Geist Mono"; font-style: normal; font-weight: 500; font-display: swap; src: url("../fonts/geist-mono-latin-500-normal.woff2") format("woff2"); }

/* ---------- 1. Tokens ---------------------------------------------------- */
:root {
  --bg:        #F1F2EE;
  --bg-2:      #E6E8E2;
  --surface:   #FAFAF8;
  --ink:       #15171C;
  --ink-2:     #3A3D44;
  --muted:     #686B72;
  --faint:     #8F9197;
  --line:      rgba(21, 23, 28, 0.11);
  --line-2:    rgba(21, 23, 28, 0.2);

  --accent:      #3350F0;
  --accent-ink:  #FFFFFF;
  --accent-soft: rgba(51, 80, 240, 0.09);

  --blue:  #3350F0;
  --green: #1E7A4B;
  --amber: #B06E12;
  --red:   #CF4128;
  --mark:  #FFE27A;

  --code-bg:  #E8EAE4;
  --code-ink: #23252B;

  --serif: "Instrument Serif", "Iowan Old Style", Georgia, serif;
  --sans:  "Geist", ui-sans-serif, system-ui, -apple-system, "Segoe UI", sans-serif;
  --mono:  "Geist Mono", ui-monospace, "SFMono-Regular", Menlo, Consolas, monospace;

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 1px 0 rgba(21,23,28,.04), 0 10px 30px -18px rgba(21,23,28,.35);
  --ease: cubic-bezier(.2, .7, .2, 1);

  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --bg:        #0E0F11;
    --bg-2:      #16171A;
    --surface:   #17191C;
    --ink:       #EDEBE5;
    --ink-2:     #CBC9C2;
    --muted:     #9C9C96;
    --faint:     #6F6F6A;
    --line:      rgba(237, 235, 229, 0.10);
    --line-2:    rgba(237, 235, 229, 0.18);
    --accent:      #8C9BFF;
    --accent-ink:  #0E0F11;
    --accent-soft: rgba(140, 155, 255, 0.12);
    --blue:  #8C9BFF;
    --green: #5CCB92;
    --amber: #E8B04B;
    --red:   #FF7A63;
    --mark:  rgba(255, 226, 122, 0.22);
    --code-bg:  #15171A;
    --code-ink: #E3E1DA;
    --shadow: 0 1px 0 rgba(0,0,0,.3), 0 14px 40px -20px rgba(0,0,0,.8);
    color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --bg:        #0E0F11;
  --bg-2:      #16171A;
  --surface:   #17191C;
  --ink:       #EDEBE5;
  --ink-2:     #CBC9C2;
  --muted:     #9C9C96;
  --faint:     #6F6F6A;
  --line:      rgba(237, 235, 229, 0.10);
  --line-2:    rgba(237, 235, 229, 0.18);
  --accent:      #8C9BFF;
  --accent-ink:  #0E0F11;
  --accent-soft: rgba(140, 155, 255, 0.12);
  --blue:  #8C9BFF;
  --green: #5CCB92;
  --amber: #E8B04B;
  --red:   #FF7A63;
  --mark:  rgba(255, 226, 122, 0.22);
  --code-bg:  #15171A;
  --code-ink: #E3E1DA;
  --shadow: 0 1px 0 rgba(0,0,0,.3), 0 14px 40px -20px rgba(0,0,0,.8);
  color-scheme: dark;
}

/* ---------- 2. Base ------------------------------------------------------ */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; scroll-padding-top: 88px; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }

body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--sans);
  font-size: 17px;
  line-height: 1.6;
  font-feature-settings: "ss01", "cv11";
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}
img, svg, video { max-width: 100%; }
img { height: auto; }
a { color: inherit; }
::selection { background: var(--accent); color: var(--accent-ink); }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

.wrap { width: 100%; max-width: var(--wrap); margin-inline: auto; padding-inline: var(--gutter); }
.muted { color: var(--muted); }
.icon { width: 1.05em; height: 1.05em; flex: none; vertical-align: -0.16em; }
.skip-link { position: absolute; left: -999px; top: 8px; background: var(--ink); color: var(--bg); padding: 8px 14px; border-radius: 8px; z-index: 100; }
.skip-link:focus { left: 8px; }

/* ---------- 3. Header ---------------------------------------------------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  -webkit-backdrop-filter: saturate(1.4) blur(14px);
  backdrop-filter: saturate(1.4) blur(14px);
  border-bottom: 1px solid transparent;
  transition: border-color .25s var(--ease);
}
.site-header.is-scrolled { border-bottom-color: var(--line); }
.header-inner { display: flex; align-items: center; gap: 24px; height: 68px; }

.brand { display: inline-flex; align-items: center; gap: 10px; text-decoration: none; font-weight: 600; letter-spacing: -0.01em; }
.brand-mark {
  position: relative; display: grid; place-items: center;
  width: 30px; height: 30px; border-radius: 9px;
  background: var(--ink); color: var(--bg);
  font-family: var(--serif); font-size: 22px; line-height: 1;
}
.brand-mark span { transform: translateY(-2px); }
.brand-mark::after {
  content: ""; position: absolute; top: -3px; right: -3px;
  width: 9px; height: 9px; border-radius: 50%;
  background: var(--accent); box-shadow: 0 0 0 2px var(--bg);
}
.brand-name { font-size: 15.5px; }

.site-nav { margin-left: auto; }
.site-nav ul { display: flex; gap: 4px; list-style: none; margin: 0; padding: 0; }
.site-nav a {
  display: block; padding: 7px 12px; border-radius: 999px;
  font-size: 14.5px; color: var(--muted); text-decoration: none;
  transition: color .2s, background-color .2s;
}
.site-nav a:hover { color: var(--ink); background: var(--bg-2); }
.site-nav a[aria-current="page"] { color: var(--ink); background: var(--surface); box-shadow: inset 0 0 0 1px var(--line); }

.header-actions { display: flex; align-items: center; gap: 6px; }
.icon-btn {
  display: grid; place-items: center; width: 38px; height: 38px;
  border: 1px solid var(--line); border-radius: 999px;
  background: transparent; color: var(--ink); cursor: pointer;
  transition: background-color .2s, border-color .2s;
}
.icon-btn:hover { background: var(--bg-2); border-color: var(--line-2); }
.icon-btn .icon { width: 18px; height: 18px; }
.theme-toggle .icon-moon { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-sun { display: none; }
:root[data-theme="dark"] .theme-toggle .icon-moon { display: block; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .theme-toggle .icon-sun { display: none; }
  :root:not([data-theme="light"]) .theme-toggle .icon-moon { display: block; }
}
.menu-toggle { display: none; }

.read-progress { position: absolute; left: 0; bottom: -1px; height: 2px; width: 100%; background: var(--accent); transform-origin: 0 50%; transform: scaleX(0); opacity: 0; }
.is-article .read-progress { opacity: 1; }

@media (max-width: 1000px) {
  .menu-toggle { display: grid; }
  .site-nav {
    position: absolute; left: 0; right: 0; top: 100%;
    background: var(--bg); border-bottom: 1px solid var(--line);
    padding: 8px var(--gutter) 18px;
    display: none;
  }
  .site-nav.is-open { display: block; animation: drop .25s var(--ease); }
  .site-nav ul { flex-direction: column; gap: 2px; }
  .site-nav a { font-size: 17px; padding: 12px 14px; border-radius: 10px; }
  .header-actions { margin-left: auto; }
}
@keyframes drop { from { opacity: 0; transform: translateY(-6px); } }

/* ---------- 4. Buttons, chips, tags ------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 11px 18px; border-radius: 999px;
  border: 1px solid var(--line-2); background: var(--surface);
  color: var(--ink); font: 500 15px/1.2 var(--sans); text-decoration: none;
  transition: transform .2s var(--ease), background-color .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { border-color: var(--ink); transform: translateY(-1px); }
.btn-primary { background: var(--ink); border-color: var(--ink); color: var(--bg); }
.btn-primary:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
.btn .icon-arrow { transition: transform .2s var(--ease); }
.btn:hover .icon-arrow { transform: translateX(3px); }
.btn-small { padding: 6px 12px; font-size: 13.5px; }

.tags { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.tags li, .tags a {
  font: 500 11.5px/1 var(--mono); letter-spacing: .01em; text-transform: lowercase;
  color: var(--muted); text-decoration: none;
}
.tags li { padding: 5px 8px; border-radius: 6px; background: var(--bg-2); }
.tags li:has(a) { padding: 0; background: none; }
.tags a { display: block; padding: 6px 9px; border-radius: 6px; background: var(--bg-2); transition: color .2s, background-color .2s; }
.tags a:hover { color: var(--accent); background: var(--accent-soft); }

.filters { display: flex; flex-wrap: wrap; gap: 8px; margin: 0 0 40px; }
.chip {
  font: 500 13px/1 var(--sans); color: var(--muted);
  padding: 9px 13px; border-radius: 999px;
  border: 1px solid var(--line); background: transparent; cursor: pointer;
  transition: all .2s var(--ease);
}
.chip:hover { color: var(--ink); border-color: var(--line-2); }
.chip-n { font: 500 11px/1 var(--mono); opacity: .6; margin-left: 3px; }
.chip.is-active { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* stream tone dot */
[class*="tone-"] i { display: inline-block; width: 7px; height: 7px; border-radius: 50%; background: currentColor; margin-right: 8px; vertical-align: 1px; }
.tone-blue  { --tone: var(--blue); }
.tone-green { --tone: var(--green); }
.tone-amber, .tone-warm { --tone: var(--amber); }
.tone-red   { --tone: var(--red); }
.tone-cool  { --tone: var(--blue); }

/* ---------- 5. Page heads ----------------------------------------------- */
.kicker {
  font: 500 12.5px/1.4 var(--mono); letter-spacing: .06em; text-transform: uppercase;
  color: var(--muted); margin: 0 0 18px;
}
.kicker .count { color: var(--ink); }
.page-head { padding: clamp(48px, 9vw, 110px) 0 clamp(28px, 4vw, 44px); max-width: 880px; }
.page-title {
  font: 50 clamp(1rem, 2.5vw, 2.4rem)/0.95 var(--serif);
  letter-spacing: -0.02em; margin: 0;
}
.page-dek { font-size: clamp(1.08rem, 1.6vw, 1.25rem); color: var(--ink-2); max-width: 58ch; margin: 22px 0 0; line-height: 1.55; }

/* ---------- 6. Home ------------------------------------------------------ */
.hero {
  display: grid; grid-template-columns: minmax(0, 1.45fr) minmax(0, .8fr);
  gap: clamp(32px, 6vw, 88px); align-items: end;
  padding-top: clamp(40px, 7vw, 96px); padding-bottom: clamp(40px, 6vw, 72px);
}
.eyebrow {
  display: inline-flex; align-items: center; gap: 10px;
  font: 500 12.5px/1 var(--mono); letter-spacing: .06em; text-transform: uppercase; color: var(--muted);
  padding: 8px 12px 8px 10px; border: 1px solid var(--line); border-radius: 999px; margin: 0 0 28px;
}
.pulse { width: 8px; height: 8px; border-radius: 50%; background: var(--green); animation: pulse 2.4s ease-out infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 color-mix(in srgb, var(--green) 55%, transparent); } 70%, 100% { box-shadow: 0 0 0 8px transparent; } }
.hero-title {
  font: 100 clamp(1.5rem, 1.4vw, 1.6rem)/1 var(--serif);
  letter-spacing: -0.025em; margin: 0;
}
.hero-title em { font-style: italic; color: var(--accent); }
.hero-lede { font-size: clamp(1.05rem, 1.5vw, 1.2rem); color: var(--ink-2); max-width: 54ch; margin: 30px 0 0; }
.hero-lede strong { color: var(--ink); font-weight: 600; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 10px; margin-top: 32px; }
.socials { display: flex; gap: 4px; list-style: none; padding: 0; margin: 26px 0 0 -8px; }
.socials a { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 999px; color: var(--muted); transition: color .2s, background-color .2s; }
.socials a:hover { color: var(--ink); background: var(--bg-2); }
.socials .icon { width: 19px; height: 19px; }

.hero-portrait { margin: 0; position: relative; }
.hero-portrait img {
  display: block; width: 80%; aspect-ratio: 4 / 5; object-fit: cover;
  border-radius: 20px; background: var(--bg-2);
  box-shadow: var(--shadow);
  transform: rotate(1.6deg);
  transition: transform .6s var(--ease);
}
.hero-portrait:hover img { transform: rotate(0deg) scale(1.01); }
.hero-portrait figcaption {
  position: absolute; left: -18px; bottom: 26px;
  display: flex; flex-direction: column;
  background: var(--surface); border: 1px solid var(--line); border-radius: 12px;
  padding: 10px 14px; box-shadow: var(--shadow);
  font: 500 12px/1.45 var(--mono); color: var(--muted); transform: rotate(-2deg);
}
.hero-portrait figcaption a { display: flex; flex-direction: column; text-decoration: none; }
.hero-portrait figcaption span:first-child { color: var(--ink); }
.hero-portrait figcaption span:last-child { color: var(--accent); }
.hero-portrait figcaption a:hover span:last-child { text-decoration: underline; text-underline-offset: 3px; }
.socials a.socials-text { width: auto; padding: 0 14px; font-size: 14px; border: 1px solid var(--line); text-decoration: none; white-space: nowrap; color: var(--ink-2); }

.now-inner {
  display: grid; grid-template-columns: auto minmax(0, 1fr); gap: 10px 28px; align-items: center;
  padding: 22px 26px; border: 1px solid var(--line); border-radius: var(--radius);
  background: var(--surface);
}
.now-label { grid-row: span 2; margin: 0; font: 400 2.3rem/1 var(--serif); font-style: italic; color: var(--accent); padding-right: 26px; border-right: 1px solid var(--line); align-self: stretch; display: flex; align-items: center; }
.now-text { margin: 0; color: var(--ink-2); }
.now-text strong { color: var(--ink); font-weight: 600; }
.now-chips { display: flex; flex-wrap: wrap; gap: 6px; list-style: none; margin: 0; padding: 0; }
.now-chips li { font-size: 13.5px; padding: 5px 11px; border-radius: 999px; background: var(--bg-2); color: var(--ink-2); }

.section { padding-top: clamp(64px, 9vw, 120px); }
.section-head { display: flex; align-items: baseline; gap: 16px; padding-bottom: 18px; margin-bottom: 8px; border-bottom: 1px solid var(--ink); }
.section-num { font: 500 12.5px/1 var(--mono); color: var(--muted); letter-spacing: .04em; }
.section-title { font: 400 clamp(2rem, 4vw, 2.9rem)/1 var(--serif); letter-spacing: -0.015em; margin: 0; }
.section-link { margin-left: auto; display: inline-flex; align-items: center; gap: 6px; font-size: 14.5px; color: var(--muted); text-decoration: none; white-space: nowrap; }
.section-link:hover { color: var(--accent); }
.section-link .icon-arrow { transition: transform .2s var(--ease); }
.section-link:hover .icon-arrow { transform: translateX(3px); }
.section-lede { color: var(--muted); margin: 18px 0 4px; }

.split { display: grid; grid-template-columns: minmax(0, 1.25fr) minmax(0, 1fr); gap: clamp(32px, 6vw, 80px); }

.themes { list-style: none; margin: 0; padding: 0; counter-reset: t; display: grid; grid-template-columns: 1fr 1fr; gap: 0 28px; }
.themes li { counter-increment: t; padding: 22px 0; border-bottom: 1px solid var(--line); }
.themes li::before { content: "0" counter(t); font: 500 12px/1 var(--mono); color: var(--accent); }
.themes h3 { font: 600 1.05rem/1.3 var(--sans); margin: 10px 0 6px; letter-spacing: -0.01em; }
.themes p { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.55; }

.note-stack { display: grid; gap: 14px; margin-top: 22px; }

.background { display: grid; grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr); gap: clamp(28px, 5vw, 72px); padding-top: 26px; }
.background-text { margin: 0; font: 200 clamp(1.4rem, 1.4vw, 1.05rem)/1.3 var(--serif); color: var(--ink); letter-spacing: -0.005em; }
.background-text em { color: var(--accent); }
.edu { list-style: none; margin: 0; padding: 0; }
.edu li { display: flex; flex-direction: column; gap: 4px; padding: 16px 0; border-top: 1px solid var(--line); }
.edu li:last-child { border-bottom: 1px solid var(--line); }
.edu-what { font-weight: 500; }
.edu-where { font: 500 12.5px/1.4 var(--mono); text-transform: uppercase; letter-spacing: .05em; color: var(--muted); }

.linkboard { display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 16px; }
.linkboard > div { padding: 24px; border-radius: var(--radius); background: var(--bg-2); }
.linkboard-label { margin: 0 0 8px; font: 500 12.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); }
.linklist { list-style: none; margin: 0; padding: 0; }
.linklist li + li { border-top: 1px solid var(--line); }
.linklist a { display: flex; flex-direction: column; gap: 3px; padding: 14px 0; text-decoration: none; }
.linklist-title { font-weight: 500; transition: color .2s; }
.linklist a:hover .linklist-title { color: var(--accent); }
.linklist-desc { font-size: 14.5px; color: var(--muted); }
.linklist-meta { font: 500 12px/1.4 var(--mono); color: var(--faint); display: inline-flex; align-items: center; gap: 6px; }
.linklist-large a { padding: 22px 0; }
.linklist-large .linklist-title { font: 400 1.7rem/1.15 var(--serif); }

/* ---------- 7. Entry list (writing) ------------------------------------- */
.entries { list-style: none; margin: 0; padding: 0; }
.entry { border-bottom: 1px solid var(--line); }
.entry[hidden] { display: none; }
.entry-link {
  display: grid; grid-template-columns: 7.5rem minmax(0, 1fr) auto 28px; gap: 24px; align-items: baseline;
  padding: 22px 0; text-decoration: none; position: relative;
}
.entry-link::before {
  content: ""; position: absolute; inset: 0 calc(-1 * min(var(--gutter), 20px)); border-radius: 12px;
  background: var(--surface); opacity: 0; transition: opacity .2s; z-index: -1;
}
.entry-link:hover::before { opacity: 1; }
.entry-date { font: 500 12.5px/1.6 var(--mono); color: var(--faint); white-space: nowrap; }
.entry-body { display: flex; flex-direction: column; gap: 6px; min-width: 0; }
.entry-title { font: 400 clamp(1.35rem, 2.2vw, 1.7rem)/1.18 var(--serif); letter-spacing: -0.005em; transition: color .2s; }
.entry-link:hover .entry-title { color: var(--accent); }
.entry-dek { font-size: 15px; color: var(--muted); line-height: 1.5; display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.entry-stream { font: 500 12px/1 var(--mono); color: var(--tone); white-space: nowrap; }
.entry-arrow { color: var(--faint); align-self: center; transition: transform .25s var(--ease), color .2s; }
.entry-link:hover .entry-arrow { color: var(--accent); transform: translateX(4px); }
.entry-arrow .icon { width: 20px; height: 20px; }

.years { display: grid; gap: 8px; }
.year-group { display: grid; grid-template-columns: 7.5rem minmax(0, 1fr); gap: 24px; border-top: 1px solid var(--ink); }
.year-group[hidden] { display: none; }
.year-label { position: sticky; top: 84px; align-self: start; margin: 0; padding-top: 22px; font: 400 2.2rem/1 var(--serif); color: var(--ink); }
.year-group .entry-link { grid-template-columns: 6.5rem minmax(0, 1fr) auto 28px; }
.year-group .entry:last-child { border-bottom: 0; }
.empty { color: var(--muted); padding: 40px 0; font-style: italic; }

/* ---------- 8. Cards (projects) ----------------------------------------- */
.cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; margin-top: 28px; }
.cards-page { margin-top: 0; }
.card {
  position: relative; display: flex; flex-direction: column;
  border-radius: 18px; background: var(--surface); border: 1px solid var(--line);
  overflow: hidden; transition: transform .35s var(--ease), box-shadow .35s var(--ease), border-color .2s;
}
.card[hidden] { display: none; }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow); border-color: var(--line-2); }
.card-media { position: relative; aspect-ratio: 16 / 9; background: var(--bg-2); overflow: hidden; border-bottom: 1px solid var(--line); }
.card-media img { width: 100%; height: 100%; object-fit: cover; object-position: top center; display: block; transition: transform .6s var(--ease); }
.card:hover .card-media img { transform: scale(1.03); }
.card-media.is-empty {
  display: grid; place-items: center;
  background:
    radial-gradient(circle at 20% 20%, var(--accent-soft), transparent 55%),
    repeating-linear-gradient(135deg, transparent 0 14px, var(--line) 14px 15px),
    var(--bg-2);
}
.card-glyph { font: 400 7rem/1 var(--serif); font-style: italic; color: var(--accent); opacity: .85; }
.card-index { position: absolute; top: 12px; left: 12px; font: 500 11.5px/1 var(--mono); padding: 6px 8px; border-radius: 6px; background: var(--surface); color: var(--muted); border: 1px solid var(--line); }
.card-body { display: flex; flex-direction: column; gap: 10px; padding: 22px 22px 20px; flex: 1; }
.card-title { font: 400 1.75rem/1.1 var(--serif); letter-spacing: -0.01em; margin: 0; }
.card-title a { text-decoration: none; }
.card:hover .card-title a { color: var(--accent); }
.stretched::after { content: ""; position: absolute; inset: 0; z-index: 1; }
.card-dek { margin: 0; color: var(--muted); font-size: 15px; line-height: 1.55; }
.card-foot { display: flex; align-items: center; justify-content: space-between; gap: 12px; margin-top: auto; padding-top: 8px; }
.card-repo {
  position: relative; z-index: 2; display: inline-flex; align-items: center; gap: 6px;
  font: 500 13px/1 var(--sans); color: var(--ink); text-decoration: none;
  padding: 7px 11px; border-radius: 999px; border: 1px solid var(--line-2); background: var(--bg);
  white-space: nowrap; transition: all .2s;
}
.card-repo:hover { background: var(--ink); color: var(--bg); border-color: var(--ink); }

/* ---------- 9. Notes ----------------------------------------------------- */
.notes-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: 18px; }
.note-card {
  position: relative; display: flex; flex-direction: column; gap: 12px;
  padding: 24px 24px 22px; border-radius: 16px; text-decoration: none;
  background: var(--surface); border: 1px solid var(--line);
  transition: transform .3s var(--ease), box-shadow .3s var(--ease);
}
.note-card::before { content: ""; position: absolute; left: 24px; top: 0; width: 42px; height: 4px; border-radius: 0 0 4px 4px; background: var(--tone); }
.note-card:hover { transform: translateY(-3px) rotate(-.3deg); box-shadow: var(--shadow); }
.note-card time { font: 500 12px/1 var(--mono); color: var(--faint); }
.note-title { font: 600 1.08rem/1.3 var(--sans); letter-spacing: -0.01em; }
.note-quote { font: 400 1.35rem/1.3 var(--serif); font-style: italic; color: var(--ink-2); }
.note-quote::before { content: "“"; color: var(--tone); }
.note-quote::after { content: "”"; color: var(--tone); }
.note-card .tags { margin-top: auto; padding-top: 6px; }

/* ---------- 10. Learning page ------------------------------------------- */
.ledger { display: grid; grid-template-columns: 16rem minmax(0, 1fr); gap: 24px 48px; padding: 36px 0 44px; border-top: 1px solid var(--ink); }
.ledger-title { margin: 0; font: 400 2rem/1.05 var(--serif); letter-spacing: -0.01em; }
.ledger-title span { display: block; font: 500 12px/1 var(--mono); color: var(--muted); margin-bottom: 12px; letter-spacing: .04em; }
.edu-large .edu-what { font: 400 1.6rem/1.2 var(--serif); }
.edu-large li:first-child { border-top: 0; padding-top: 0; }
.certs { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fill, minmax(230px, 1fr)); gap: 12px; }
.certs li { display: flex; flex-direction: column; gap: 8px; justify-content: space-between; padding: 18px; min-height: 112px; border-radius: 12px; background: var(--surface); border: 1px solid var(--line); }
.cert-name { font-weight: 600; line-height: 1.3; }
.cert-issuer { font: 500 11.5px/1.4 var(--mono); color: var(--muted); text-transform: uppercase; letter-spacing: .04em; }
.course-groups { display: grid; gap: 28px; }
.course-group h3 { margin: 0 0 6px; font: 500 12.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--accent); }
.course-group ul { list-style: none; margin: 0; padding: 0; }
.course-group li { display: flex; justify-content: space-between; gap: 20px; padding: 13px 0; border-bottom: 1px solid var(--line); }
.course-platform { font: 500 12px/1.6 var(--mono); color: var(--faint); white-space: nowrap; }
.ledger .linklist a { padding-top: 0; }

/* ---------- 11. Article --------------------------------------------------- */
.article-head { padding-top: clamp(44px, 8vw, 96px); padding-bottom: clamp(28px, 4vw, 44px); }
.article-head > * { max-width: 920px; }
.stream-link { font: 500 12.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--tone, var(--muted)); text-decoration: none; }
.stream-link:hover { text-decoration: underline; text-underline-offset: 4px; }
.article-title { font: 400 clamp(2.4rem, 5.6vw, 4.5rem)/1.02 var(--serif); letter-spacing: -0.02em; margin: 0; text-wrap: balance; }
.article-dek { font-size: clamp(1.1rem, 1.7vw, 1.3rem); line-height: 1.5; color: var(--ink-2); margin: 24px 0 0; max-width: 62ch; }
.article-meta { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 20px; margin-top: 28px; font: 500 13px/1 var(--mono); color: var(--muted); }
.article-meta > span::before, .article-meta > time + span::before { content: ""; }
.article-meta .btn { font-family: var(--sans); }
.tags-head { margin-top: 22px; }

.article-grid { display: grid; grid-template-columns: minmax(0, 1fr); gap: 56px; padding-top: 36px; border-top: 1px solid var(--line); }
@media (min-width: 1100px) {
  .article-grid { grid-template-columns: minmax(0, 720px) 1fr; }
  .article-grid.no-toc { grid-template-columns: minmax(0, 720px); }
}
.toc { position: sticky; top: 100px; align-self: start; max-height: calc(100vh - 130px); overflow: auto; padding-left: 22px; border-left: 1px solid var(--line); font-size: 14px; }
.toc[hidden] { display: none; }
@media (max-width: 1099px) { .toc { display: none !important; } }
.toc-label { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); margin: 0 0 14px; }
.toc ol { list-style: none; margin: 0; padding: 0; display: grid; gap: 2px; }
.toc a { display: block; padding: 5px 0; color: var(--muted); text-decoration: none; line-height: 1.35; transition: color .2s; }
.toc a:hover { color: var(--ink); }
.toc a.is-active { color: var(--accent); }
.toc .toc-h3 a { padding-left: 14px; font-size: 13.5px; }

.article-foot { padding-top: 64px; }
.pager { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.pager-link { display: flex; flex-direction: column; gap: 10px; padding: 22px; border-radius: 14px; border: 1px solid var(--line); background: var(--surface); text-decoration: none; transition: border-color .2s, transform .25s var(--ease); }
.pager-link:hover { border-color: var(--ink); transform: translateY(-2px); }
.pager-link.next { text-align: right; grid-column: 2; }
.pager-dir { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: var(--muted); display: inline-flex; align-items: center; gap: 6px; }
.pager-link.next .pager-dir { justify-content: flex-end; }
.pager-title { font: 400 1.35rem/1.2 var(--serif); }
.back-link { display: inline-flex; align-items: center; gap: 8px; margin-top: 28px; color: var(--muted); text-decoration: none; font-size: 15px; }
.back-link:hover { color: var(--accent); }

/* ---------- 12. Prose ----------------------------------------------------- */
.prose { font-size: 1.07rem; line-height: 1.75; color: var(--ink-2); min-width: 0; overflow-wrap: break-word; }
.prose > :first-child { margin-top: 0; }
.prose p, .prose ul, .prose ol, .prose blockquote, .prose table, .prose pre, .prose figure, .prose .highlighter-rouge, .prose .table-wrap { margin: 0 0 1.35em; }
.prose h1, .prose h2, .prose h3, .prose h4 { color: var(--ink); scroll-margin-top: 96px; }
.prose h1 { font: 400 2.3rem/1.1 var(--serif); margin: 2em 0 .6em; letter-spacing: -0.015em; }
.prose h2 { font: 400 2rem/1.12 var(--serif); margin: 2.1em 0 .6em; letter-spacing: -0.01em; }
.prose h3 { font: 600 1.2rem/1.35 var(--sans); margin: 1.9em 0 .5em; letter-spacing: -0.01em; }
.prose h4 { font: 600 1.02rem/1.4 var(--sans); margin: 1.6em 0 .4em; }
.prose a { color: var(--ink); text-decoration: underline; text-decoration-color: var(--accent); text-decoration-thickness: 1.5px; text-underline-offset: 3px; transition: color .2s; }
.prose a:hover { color: var(--accent); }
.prose strong { color: var(--ink); font-weight: 600; }
.prose ul, .prose ol { padding-left: 1.3em; }
.prose li { margin: .35em 0; padding-left: .2em; }
.prose li::marker { color: var(--faint); }
.prose ol > li::marker { font: 500 .9em var(--mono); }
.prose blockquote {
  margin-left: 0; padding: 18px 22px; border-radius: 0 12px 12px 0;
  border-left: 3px solid var(--accent); background: var(--accent-soft); color: var(--ink);
}
.prose blockquote > :last-child { margin-bottom: 0; }
.prose hr { border: 0; height: auto; margin: 3em 0; text-align: center; }
.prose hr::after { content: "· · ·"; letter-spacing: .6em; color: var(--faint); font-size: 1.1rem; }
.prose img {
  display: block; margin: 1.8em auto; border-radius: 12px; border: 1px solid var(--line);
  max-width: 100% !important; height: auto !important; box-shadow: none !important; background: var(--surface);
}
.prose p[align="center"] img, .prose p > img:only-child { margin: 1.2em auto; }
.prose mark { background: var(--mark); color: inherit; padding: 0 .15em; border-radius: 3px; }

.prose :not(pre) > code {
  font: 500 .86em/1 var(--mono); color: var(--ink);
  background: var(--code-bg); border: 1px solid var(--line); padding: .16em .4em; border-radius: 6px;
  overflow-wrap: anywhere;
}
.prose pre, .prose .highlight {
  font: 400 13.5px/1.65 var(--mono); color: var(--code-ink);
  background: var(--code-bg); border-radius: 12px; overflow-x: auto;
}
.prose div.highlighter-rouge { position: relative; border: 1px solid var(--line); border-radius: 12px; }
.prose div.highlighter-rouge .highlight { margin: 0; }
.prose pre { margin: 0; padding: 18px 20px; tab-size: 2; }
.prose pre code { font: inherit; background: none; border: 0; padding: 0; }
.code-lang { position: absolute; top: 9px; right: 12px; font: 500 11px/1 var(--mono); color: var(--faint); text-transform: lowercase; pointer-events: none; transition: opacity .2s; }
.copy-btn {
  position: absolute; top: 7px; right: 8px; opacity: 0;
  font: 500 11.5px/1 var(--mono); color: var(--ink); cursor: pointer;
  padding: 6px 9px; border-radius: 6px; border: 1px solid var(--line-2); background: var(--surface);
  transition: opacity .2s;
}
.highlighter-rouge:hover .copy-btn, .copy-btn:focus-visible { opacity: 1; }
.highlighter-rouge:hover .code-lang { opacity: 0; }

.table-wrap { overflow-x: auto; border: 1px solid var(--line); border-radius: 12px; }
.prose table { width: 100%; border-collapse: collapse; font-size: .92rem; line-height: 1.5; margin: 0; }
.prose th, .prose td { padding: 11px 14px; text-align: left; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font: 500 12px/1.3 var(--mono); text-transform: uppercase; letter-spacing: .04em; color: var(--muted); background: var(--bg-2); }
.prose tr:last-child td { border-bottom: 0; }

.prose-page { max-width: 720px; padding-bottom: 40px; }

/* ---------- 13. Syntax (rouge) ------------------------------------------ */
.highlight .c, .highlight .c1, .highlight .cm, .highlight .cs, .highlight .cp, .highlight .ch, .highlight .cd { color: var(--faint); font-style: italic; }
.highlight .k, .highlight .kd, .highlight .kn, .highlight .kp, .highlight .kr, .highlight .kv, .highlight .ow { color: #8A3FFC; }
.highlight .kc, .highlight .kt, .highlight .nb, .highlight .bp { color: #0B7A75; }
.highlight .s, .highlight .s1, .highlight .s2, .highlight .sb, .highlight .sc, .highlight .sd, .highlight .se, .highlight .sh, .highlight .si, .highlight .sx, .highlight .sr, .highlight .ss, .highlight .dl { color: #1E7A4B; }
.highlight .m, .highlight .mi, .highlight .mf, .highlight .mh, .highlight .mo, .highlight .il { color: #B85B00; }
.highlight .nf, .highlight .fm, .highlight .nx { color: #2F4AE0; }
.highlight .nc, .highlight .nn, .highlight .ne { color: #B0306A; }
.highlight .na, .highlight .nt, .highlight .nv, .highlight .vi, .highlight .vg { color: #B0306A; }
.highlight .nd, .highlight .ni { color: #B85B00; }
.highlight .o, .highlight .p { color: var(--muted); }
.highlight .gd { color: var(--red); } .highlight .gi { color: var(--green); }
.highlight .err { color: inherit; background: none; }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .highlight .k, :root:not([data-theme="light"]) .highlight .kd, :root:not([data-theme="light"]) .highlight .kn, :root:not([data-theme="light"]) .highlight .kr, :root:not([data-theme="light"]) .highlight .ow { color: #C4A5FF; }
  :root:not([data-theme="light"]) .highlight .kc, :root:not([data-theme="light"]) .highlight .kt, :root:not([data-theme="light"]) .highlight .nb, :root:not([data-theme="light"]) .highlight .bp { color: #5FD4CB; }
  :root:not([data-theme="light"]) .highlight .s, :root:not([data-theme="light"]) .highlight .s1, :root:not([data-theme="light"]) .highlight .s2, :root:not([data-theme="light"]) .highlight .sd, :root:not([data-theme="light"]) .highlight .dl, :root:not([data-theme="light"]) .highlight .sb { color: #8FDBA8; }
  :root:not([data-theme="light"]) .highlight .m, :root:not([data-theme="light"]) .highlight .mi, :root:not([data-theme="light"]) .highlight .mf, :root:not([data-theme="light"]) .highlight .nd { color: #F2B86A; }
  :root:not([data-theme="light"]) .highlight .nf, :root:not([data-theme="light"]) .highlight .fm, :root:not([data-theme="light"]) .highlight .nx { color: #9FB0FF; }
  :root:not([data-theme="light"]) .highlight .nc, :root:not([data-theme="light"]) .highlight .nn, :root:not([data-theme="light"]) .highlight .na, :root:not([data-theme="light"]) .highlight .nt, :root:not([data-theme="light"]) .highlight .nv { color: #F59AC3; }
}
:root[data-theme="dark"] .highlight .k, :root[data-theme="dark"] .highlight .kd, :root[data-theme="dark"] .highlight .kn, :root[data-theme="dark"] .highlight .kr, :root[data-theme="dark"] .highlight .ow { color: #C4A5FF; }
:root[data-theme="dark"] .highlight .kc, :root[data-theme="dark"] .highlight .kt, :root[data-theme="dark"] .highlight .nb, :root[data-theme="dark"] .highlight .bp { color: #5FD4CB; }
:root[data-theme="dark"] .highlight .s, :root[data-theme="dark"] .highlight .s1, :root[data-theme="dark"] .highlight .s2, :root[data-theme="dark"] .highlight .sd, :root[data-theme="dark"] .highlight .dl, :root[data-theme="dark"] .highlight .sb { color: #8FDBA8; }
:root[data-theme="dark"] .highlight .m, :root[data-theme="dark"] .highlight .mi, :root[data-theme="dark"] .highlight .mf, :root[data-theme="dark"] .highlight .nd { color: #F2B86A; }
:root[data-theme="dark"] .highlight .nf, :root[data-theme="dark"] .highlight .fm, :root[data-theme="dark"] .highlight .nx { color: #9FB0FF; }
:root[data-theme="dark"] .highlight .nc, :root[data-theme="dark"] .highlight .nn, :root[data-theme="dark"] .highlight .na, :root[data-theme="dark"] .highlight .nt, :root[data-theme="dark"] .highlight .nv { color: #F59AC3; }

/* ---------- 14. Footer ---------------------------------------------------- */
.site-footer { margin-top: clamp(80px, 12vw, 160px); background: var(--ink); color: var(--bg); padding: clamp(56px, 8vw, 96px) 0 28px; }
.site-footer a { color: inherit; text-decoration: none; }
.site-footer .muted { color: color-mix(in srgb, var(--bg) 55%, transparent); }
.footer-cta { padding-bottom: clamp(40px, 6vw, 64px); margin-bottom: 0; border-bottom: 1px solid color-mix(in srgb, var(--bg) 16%, transparent); }
.footer-kicker { font: 500 12.5px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: color-mix(in srgb, var(--bg) 55%, transparent); margin: 0 0 18px; }
.footer-line { font: 400 clamp(2.4rem, 6.4vw, 5.2rem)/1 var(--serif); letter-spacing: -0.02em; margin: 0 0 34px; max-width: 16ch; }
.footer-line em { color: var(--accent); }
:root:not([data-theme="dark"]) .site-footer .footer-line em { color: #93A2FF; }
.site-footer .btn-primary { background: var(--bg); color: var(--ink); border-color: var(--bg); }
.site-footer .btn-primary:hover { background: var(--accent); border-color: var(--accent); color: var(--accent-ink); }
:root:not([data-theme="dark"]) .site-footer .btn-primary:hover { background: #93A2FF; border-color: #93A2FF; color: #0E0F11; }
.footer-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 32px; padding: 44px 0; }
.footer-label { font: 500 12px/1 var(--mono); text-transform: uppercase; letter-spacing: .06em; color: color-mix(in srgb, var(--bg) 50%, transparent); margin: 0 0 16px; }
.footer-grid ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 9px; }
.footer-grid a { color: color-mix(in srgb, var(--bg) 85%, transparent); transition: color .2s; }
.footer-grid a:hover { color: var(--bg); text-decoration: underline; text-underline-offset: 4px; }
.footer-clock { margin: 0; font: 400 1.9rem/1.2 var(--serif); }
.footer-clock .muted { font: 400 13px/1.6 var(--sans); }
.footer-base { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px; padding-top: 24px; margin-top: 0; border-top: 1px solid color-mix(in srgb, var(--bg) 16%, transparent); font-size: 13.5px; }

/* dark theme: footer becomes a lifted panel instead of inverted */
:root[data-theme="dark"] .site-footer { background: var(--bg-2); color: var(--ink); border-top: 1px solid var(--line); }
:root[data-theme="dark"] .site-footer .muted,
:root[data-theme="dark"] .footer-kicker,
:root[data-theme="dark"] .footer-label { color: var(--muted); }
:root[data-theme="dark"] .footer-grid a { color: var(--ink-2); }
:root[data-theme="dark"] .footer-grid a:hover { color: var(--ink); }
:root[data-theme="dark"] .footer-cta, :root[data-theme="dark"] .footer-base { border-color: var(--line); }
:root[data-theme="dark"] .site-footer .btn-primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) .site-footer { background: var(--bg-2); color: var(--ink); border-top: 1px solid var(--line); }
  :root:not([data-theme="light"]) .site-footer .muted,
  :root:not([data-theme="light"]) .footer-kicker,
  :root:not([data-theme="light"]) .footer-label { color: var(--muted); }
  :root:not([data-theme="light"]) .footer-grid a { color: var(--ink-2); }
  :root:not([data-theme="light"]) .footer-grid a:hover { color: var(--ink); }
  :root:not([data-theme="light"]) .footer-cta, :root:not([data-theme="light"]) .footer-base { border-color: var(--line); }
  :root:not([data-theme="light"]) .site-footer .btn-primary { background: var(--ink); color: var(--bg); border-color: var(--ink); }
  :root:not([data-theme="light"]) .site-footer .footer-line em { color: var(--accent); }
}

/* ---------- 15. 404 ------------------------------------------------------- */
.notfound { padding-top: clamp(64px, 12vw, 160px); }
.notfound-title { font: 400 clamp(3rem, 9vw, 7rem)/0.95 var(--serif); letter-spacing: -0.02em; margin: 0; }
.notfound-title em { color: var(--accent); }

/* ---------- 16. Motion ---------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(14px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.is-in { opacity: 1; transform: none; }

/* ---------- 17. Responsive ----------------------------------------------- */
@media (max-width: 980px) {
  .hero { grid-template-columns: 1fr; align-items: start; }
  .hero-portrait { max-width: 420px; order: -1; }
  .hero-portrait img { aspect-ratio: 5 / 4; }
  .hero-portrait figcaption { left: auto; right: -8px; bottom: -14px; }
  .split, .background { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .ledger { grid-template-columns: 1fr; }
}
@media (max-width: 720px) {
  body { font-size: 16px; }
  .hero-portrait { max-width: none; }
  .hero-portrait img { transform: none; aspect-ratio: 4 / 3; object-position: 50% 30%; border-radius: 16px; }
  .hero-portrait figcaption { right: 12px; bottom: -16px; }
  .now-inner { grid-template-columns: 1fr; padding: 20px; }
  .now-label { grid-row: auto; border-right: 0; padding-right: 0; font-size: 1.9rem; }
  .cards { grid-template-columns: 1fr; }
  .themes { grid-template-columns: 1fr; }
  .entry-link, .year-group .entry-link { grid-template-columns: minmax(0, 1fr) 22px; gap: 6px 14px; padding: 18px 0; }
  .entry-date { grid-column: 1; grid-row: 1; }
  .entry-body { grid-column: 1; grid-row: 2; }
  .entry-stream { grid-column: 1; grid-row: 3; margin-top: 4px; }
  .entry-arrow { grid-column: 2; grid-row: 1 / span 3; }
  .year-group { grid-template-columns: 1fr; gap: 0; }
  .year-label { position: static; padding: 20px 0 4px; font-size: 1.8rem; }
  .section-head { flex-wrap: wrap; gap: 8px 14px; }
  .section-link { margin-left: 0; width: 100%; order: 3; }
  .pager { grid-template-columns: 1fr; }
  .pager-link.next { grid-column: 1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 28px 20px; }
  .course-group li { flex-direction: column; gap: 2px; }
  .prose { font-size: 1.02rem; }
  .prose pre { font-size: 12.5px; padding: 16px; }
  .copy-btn { opacity: 1; }
  .code-lang { display: none; }
}
@media (max-width: 420px) {
  .footer-grid { grid-template-columns: 1fr; }
}