/* =====================================================================
   NISHTAR · nishtarnotes.com
   Layout concept: jamesclear.com's reading structure (intro band with a
   signup card, dotted dividers, topic columns, dated archives) dressed in
   the original NISHTAR identity: a warm near-black page, one gold accent,
   Georgia for reading, Inter for wayfinding. Dark by design, single theme.
   ===================================================================== */
:root {
  color-scheme: dark;
  /* color */
  --bg: #0e0d0b;            /* page */
  --band: #14130f;          /* intro bands */
  --raised: #1a1915;        /* cards, panels */
  --line: #2a2822;          /* hairlines */
  --text: #e9e5dc;          /* reading text */
  --heading: #f7f4ee;       /* titles */
  --muted: #9b968b;         /* secondary text (5.9:1 on --bg) */
  --faint: #5d594f;         /* decoration only, never text */
  --accent: #c8a96e;        /* gold */
  --accent-ink: #14110b;    /* text on gold */
  --accent-soft: rgba(200, 169, 110, 0.13);
  --accent-line: rgba(200, 169, 110, 0.45);
  /* type */
  --serif: Georgia, "Iowan Old Style", "Times New Roman", serif;
  --sans: "Inter", "Helvetica Neue", Arial, sans-serif;
  /* layout */
  --wide: 1120px;
  --narrow: 680px;
  --gutter: clamp(1rem, 5vw, 2.5rem);
}

*, *::before, *::after { box-sizing: border-box; }
html { font-size: 18px; -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--serif);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}
h1, h2, h3, h4 { color: var(--heading); line-height: 1.2; margin: 0; text-wrap: balance; font-weight: 600; }
p { margin: 0 0 1.25rem; }
a { color: inherit; text-decoration: none; transition: color 0.18s ease; }
a:hover { color: var(--accent); }
img { max-width: 100%; height: auto; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }
.nw { white-space: nowrap; }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0 0 0 0); white-space: nowrap; }
.skip-link { position: absolute; left: 1rem; top: -4rem; background: var(--accent); color: var(--accent-ink); padding: 0.5rem 1rem; font-family: var(--sans); z-index: 10; }
.skip-link:focus { top: 1rem; }

/* ---------- layout ---------- */
.container { max-width: calc(var(--wide) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); }
.container.narrow, .narrow { max-width: calc(var(--narrow) + 2 * var(--gutter)); }
.section { margin-block: 4.5rem; }

/* ---------- header ---------- */
.site-header { border-top: 4px solid var(--heading); }
.nav {
  max-width: calc(var(--wide) + 2 * var(--gutter));
  margin-inline: auto;
  padding: 1.6rem var(--gutter);
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  gap: 1rem;
  font-family: var(--sans);
}
.brand { font-weight: 600; font-size: 0.85rem; letter-spacing: 0.24em; color: var(--heading); }
.nav-main { display: flex; gap: 2rem; list-style: none; margin: 0; padding: 0; }
.nav-main a, .nav-about { font-size: 0.9rem; color: var(--text); padding-block: 0.25rem; border-bottom: 1px solid transparent; }
.nav-about { justify-self: end; font-weight: 600; color: var(--heading); }
.nav-main a[aria-current="page"], .nav-about[aria-current="page"] { border-bottom-color: var(--accent-line); }
.nav-main a:hover, .nav-about:hover { color: var(--accent); }

/* ---------- intro band (jamesclear.com page top) ---------- */
.band { background: var(--band); border-bottom: 1px solid var(--line); padding-block: 4.5rem 5rem; }
.intro-grid { display: grid; grid-template-columns: minmax(0, 1.2fr) minmax(0, 1fr); gap: 4.5rem; align-items: start; }
.intro { max-width: 34rem; }
.intro h1 { font-family: var(--sans); font-size: 2.2rem; letter-spacing: -0.015em; margin-bottom: 1.75rem; }
.intro h1.display { font-family: var(--serif); font-weight: 400; font-size: clamp(2.3rem, 4.6vw, 3.3rem); line-height: 1.12; letter-spacing: -0.01em; }
.intro p { font-size: 1.08rem; }
.intro a { border-bottom: 1px solid var(--accent-line); }
.intro .lede { font-style: italic; font-size: 1.3rem; color: var(--heading); }
.eyebrow { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.1rem; }
.eyebrow a { color: inherit; }

/* ---------- signup card ---------- */
.signup-card {
  position: relative;
  background: var(--raised);
  border: 1px solid var(--line);
  padding: 2.5rem clamp(1.25rem, 4vw, 3rem) 2.25rem;
  text-align: center;
  overflow: hidden;
}
.signup-card::after { /* the dotted corner from jamesclear.com */
  content: ""; position: absolute; right: 0.9rem; bottom: 0.9rem; width: 3.2rem; height: 2.4rem;
  background-image: radial-gradient(var(--faint) 1px, transparent 1.4px);
  background-size: 0.6rem 0.6rem; opacity: 0.7; pointer-events: none;
}
.signup-heading { font-family: var(--sans); font-weight: 600; font-size: 1.12rem; line-height: 1.4; color: var(--heading); margin: 0 auto 1.75rem; max-width: 20rem; text-wrap: balance; }
.signup-form { display: grid; gap: 0.5rem; max-width: 20rem; margin-inline: auto; }
.signup-form input {
  width: 100%; font: inherit; font-family: var(--sans); font-size: 0.95rem; text-align: center;
  background: var(--bg); color: var(--heading); border: 1px solid var(--accent-line); padding: 0.85rem 1rem; border-radius: 0;
}
.signup-form input::placeholder { color: var(--muted); }
.signup-form input:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-soft); }
.signup-form button, .btn {
  font-family: var(--sans); font-weight: 600; font-size: 0.95rem; background: var(--accent); color: var(--accent-ink);
  border: 0; padding: 0.9rem 1.25rem; cursor: pointer; transition: filter 0.18s ease;
}
.signup-form button:hover, .btn:hover { filter: brightness(1.08); color: var(--accent-ink); }
.signup-note { font-style: italic; font-size: 0.92rem; color: var(--muted); margin: 1.5rem auto 0; max-width: 18rem; }
.signup-status { font-family: var(--sans); font-size: 0.85rem; color: var(--accent); margin: 1rem 0 0; }
.item .signup-card, .about-body + .narrow .signup-card, .narrow > .signup-card { margin-block: 3.5rem; }

/* ---------- dotted divider ---------- */
.dots { display: flex; justify-content: center; gap: 0.9rem; margin-block: 4.5rem 0; }
.dots span { width: 4px; height: 4px; border-radius: 50%; background: var(--accent); opacity: 0.75; }

/* ---------- section heads ---------- */
.section-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; padding-bottom: 0.9rem; border-bottom: 1px solid var(--line); margin-bottom: 0.5rem; }
.section-title { font-family: var(--sans); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.section-link { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); white-space: nowrap; }
.centered-head { text-align: center; margin-bottom: 3rem; }
.headline { font-family: var(--sans); font-size: clamp(1.7rem, 3.4vw, 2.2rem); letter-spacing: -0.015em; margin-bottom: 0.75rem; }
.centered-head p { color: var(--muted); margin: 0; }
.subhead { font-family: var(--sans); font-size: 1.35rem; margin-bottom: 1rem; }
.group-label { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.18em; text-transform: uppercase; color: var(--accent); margin-bottom: 1.25rem; }

/* ---------- rows (lists of posts) ---------- */
.rows { list-style: none; margin: 0; padding: 0; }
.row { padding-block: 1.3rem; border-bottom: 1px solid var(--line); display: grid; gap: 0.35rem; }
.row:last-child { border-bottom: 0; }
.row-link { display: grid; gap: 0.35rem; }
.row-title { font-size: 1.22rem; line-height: 1.35; color: var(--heading); transition: color 0.18s ease; }
.row-link:hover .row-title { color: var(--accent); }
.row-excerpt { color: var(--muted); font-size: 0.98rem; margin: 0; }
.row-meta { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 0; display: flex; gap: 0.75rem; }
.row-kind { color: var(--accent); }
.empty-state { font-style: italic; color: var(--muted); padding-block: 1.4rem; margin: 0; }
.notice { text-align: center; font-style: italic; color: var(--accent); font-size: 1.1rem; margin: -1rem 0 3rem; }

/* ---------- topic tiles (home) ---------- */
.tile-group + .tile-group { margin-top: 2.25rem; }
.tile-group { margin-top: 1.75rem; }
.tiles { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 1rem; }
.tile { display: grid; align-content: start; gap: 0.4rem; background: var(--raised); border: 1px solid var(--line); padding: 1.3rem 1.4rem; transition: border-color 0.18s ease, background 0.18s ease; }
.tile:hover { border-color: var(--accent-line); background: var(--accent-soft); color: inherit; }
.tile-name { font-family: var(--sans); font-weight: 600; color: var(--heading); }
.tile-blurb { color: var(--muted); font-size: 0.93rem; line-height: 1.55; }
.tile-count { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--accent); margin-top: 0.35rem; }

.split { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4rem; }

/* ---------- topic columns (articles page) ---------- */
.topic-group { margin-top: 3.5rem; }
.topic-cols { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 3.25rem 4.5rem; }
.topic-col h3 { font-family: var(--sans); font-size: 1.12rem; padding-bottom: 0.9rem; border-bottom: 1px solid var(--line); }
.hairline-list { list-style: none; margin: 0; padding: 0; }
.hairline-list li { border-bottom: 1px solid var(--line); padding-block: 0.85rem; line-height: 1.5; }
.topic-empty { color: var(--muted); font-style: italic; padding-block: 0.9rem; margin: 0; border-bottom: 1px solid var(--line); }
.more-link { display: inline-block; margin-top: 1.3rem; font-family: var(--sans); font-size: 0.76rem; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--heading); }

/* ---------- 1-3-1 format strip ---------- */
.format { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-block: 1px solid var(--line); }
.format-part { display: grid; justify-items: center; text-align: center; gap: 0.5rem; padding: 2.5rem 1.5rem; }
.format-part + .format-part { border-left: 1px solid var(--line); }
.format-num { font-family: var(--serif); font-size: 4.2rem; line-height: 1; color: var(--accent); font-variant-numeric: lining-nums; }
.format-name { font-family: var(--sans); font-size: 0.78rem; font-weight: 600; letter-spacing: 0.2em; text-transform: uppercase; color: var(--heading); }
.format-desc { color: var(--muted); font-size: 0.97rem; max-width: 17rem; }

/* ---------- newsletter archive ---------- */
.issue-archive { max-width: 52rem; margin-inline: auto; }
.issue-year { display: grid; grid-template-columns: 7rem minmax(0, 1fr); gap: 1rem; margin-bottom: 2.5rem; }
.issue-year h3 { font-family: var(--sans); font-size: 1.1rem; padding-top: 0.15rem; }
.issue-list { list-style: none; margin: 0; padding: 0; }
.issue-list li { display: grid; grid-template-columns: 4.5rem minmax(0, 1fr); gap: 1rem; padding-block: 0.55rem; }
.issue-list time { font-family: var(--sans); font-size: 0.74rem; font-weight: 600; letter-spacing: 0.1em; color: var(--muted); padding-top: 0.3rem; font-variant-numeric: tabular-nums; }
.issue-list a { font-family: var(--sans); font-weight: 600; font-size: 1.05rem; line-height: 1.45; color: var(--heading); }
.issue-list a:hover { color: var(--accent); }

/* ---------- notes stream (seths.blog style) ---------- */
.note-stream { margin-block: 3.5rem 2rem; }
.note-full { padding-block: 2.75rem; border-bottom: 1px solid var(--line); }
.note-full:first-child { padding-top: 0; }
.note-meta { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.6rem; margin-bottom: 0.75rem; }
.note-title { font-family: var(--serif); font-weight: 400; font-size: clamp(1.6rem, 3.6vw, 2rem); margin-bottom: 1.25rem; }
.topic-tag { color: var(--accent); }
.archive { margin-top: 4rem; }
.archive .section-title { margin-bottom: 1.5rem; }
.month { margin-bottom: 2rem; }
.month h3 { font-family: var(--sans); font-size: 0.95rem; margin-bottom: 0.5rem; }
.month ul { list-style: none; margin: 0; padding: 0; }
.month li { display: flex; justify-content: space-between; gap: 1rem; padding-block: 0.6rem; border-bottom: 1px solid var(--line); }
.month li a { min-width: 0; }
.month time { font-family: var(--sans); font-size: 0.72rem; letter-spacing: 0.1em; color: var(--muted); white-space: nowrap; padding-top: 0.3rem; }

/* ---------- reading (prose) ---------- */
.prose { font-size: 1.12rem; line-height: 1.78; }
.prose p { margin: 0 0 1.5rem; }
.prose a { border-bottom: 1px solid var(--accent-line); }
.prose a:hover { border-bottom-color: var(--accent); }
.prose h2 { font-family: var(--sans); font-size: 1.45rem; margin: 3rem 0 1rem; }
.prose h3 { font-family: var(--sans); font-size: 1.15rem; margin: 2.25rem 0 0.75rem; }
.prose ul, .prose ol { padding-left: 1.4rem; margin: 0 0 1.5rem; }
.prose li { margin-bottom: 0.5rem; }
.prose li::marker { color: var(--accent); }
.prose blockquote { margin: 2rem 0; padding: 0.1rem 0 0.1rem 1.5rem; border-left: 2px solid var(--accent); color: var(--heading); font-style: italic; font-size: 1.15rem; }
.prose blockquote p:last-child { margin-bottom: 0; }
.prose hr { border: 0; height: 4px; margin: 3rem auto; width: 5.5rem; background-image: radial-gradient(circle, var(--accent) 2px, transparent 2.5px); background-size: 1.1rem 4px; background-repeat: repeat-x; opacity: 0.75; }
.prose figure { margin: 2.25rem 0; }
.prose figure img, .prose picture img { display: block; width: 100%; height: auto; }
.prose figcaption, .prose .image-caption { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); margin-top: 0.6rem; text-align: center; }
.prose code { font-size: 0.88em; background: var(--raised); padding: 0.1em 0.35em; border-radius: 3px; }
.prose iframe { max-width: 100%; }
.prose strong { color: var(--heading); }
sup.fn-ref { font-family: var(--sans); font-size: 0.62em; line-height: 0; }
sup.fn-ref a { color: var(--accent); border: 0; padding-inline: 0.1em; }
.footnotes { margin-top: 3rem; padding-top: 1.5rem; border-top: 1px solid var(--line); font-size: 0.92rem; color: var(--muted); }
.footnotes-label { font-family: var(--sans); font-size: 0.72rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; }
.footnotes a.fn-back { border: 0; color: var(--accent); }

/* ---------- single post ---------- */
.item-header { padding-block: 4.5rem 0; }
.item-title { font-family: var(--serif); font-weight: 400; font-size: clamp(2.1rem, 5.2vw, 3.1rem); line-height: 1.12; letter-spacing: -0.01em; margin-bottom: 1.25rem; }
.item-subtitle { font-size: 1.25rem; color: var(--muted); line-height: 1.55; margin-bottom: 1.5rem; }
.item-meta { font-family: var(--sans); font-size: 0.74rem; letter-spacing: 0.12em; text-transform: uppercase; color: var(--muted); display: flex; flex-wrap: wrap; gap: 0.6rem; padding-bottom: 2rem; border-bottom: 1px solid var(--line); margin: 0; }
.item-body { margin-top: 2.5rem; }
.item-articles .item-body > p:first-of-type::first-letter { float: left; font-size: 3.6rem; line-height: 0.85; margin: 0.35rem 0.6rem 0 0; color: var(--accent); }
.item-newsletter .item-body h2 { font-size: 0.76rem; letter-spacing: 0.2em; text-transform: uppercase; color: var(--accent); padding-top: 2rem; border-top: 1px solid var(--line); margin-top: 2.75rem; }
.item-newsletter .item-body h2:first-child { border-top: 0; padding-top: 0; margin-top: 0; }
.source-note { font-family: var(--sans); font-size: 0.82rem; color: var(--muted); }
.source-note a { border-bottom: 1px solid var(--accent-line); }
.pager { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 1rem; margin-block: 1rem 3rem; }
.pager a { display: grid; gap: 0.3rem; background: var(--raised); border: 1px solid var(--line); padding: 1.1rem 1.25rem; transition: border-color 0.18s ease; }
.pager a:hover { border-color: var(--accent-line); color: inherit; }
.pager .next { grid-column: 2; text-align: right; }
.nav-dir { font-family: var(--sans); font-size: 0.7rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.nav-title { color: var(--heading); line-height: 1.4; }
.keep-reading { margin-bottom: 4rem; }
.keep-reading .section-title { padding-bottom: 0.9rem; border-bottom: 1px solid var(--line); }

/* ---------- about ---------- */
.about-grid { align-items: center; }
.checks { list-style: none; margin: 0; padding: 0; display: grid; gap: 1.4rem; justify-self: center; }
.checks li { display: grid; grid-template-columns: 1.6rem minmax(0, 1fr); align-items: center; gap: 1rem; font-family: var(--sans); font-weight: 600; font-size: 1.12rem; color: var(--heading); line-height: 1.35; }
.checks li::before { content: "✓"; display: grid; place-items: center; width: 1.6rem; height: 1.6rem; border-radius: 50%; background: var(--accent); color: var(--accent-ink); font-size: 0.85rem; }
.about-body { margin-top: 4rem; }
.about-body h2:first-child { margin-top: 0; }
.start-here { list-style: none; padding: 0 !important; }
.start-here li { padding-block: 0.7rem; border-bottom: 1px solid var(--line); margin: 0 !important; }
.start-here a { color: var(--heading); font-weight: 600; }

/* ---------- topic page ---------- */
.topic-section + .topic-section { margin-top: 3.5rem; }
.topic-section .section-title { padding-bottom: 0.9rem; border-bottom: 1px solid var(--line); }

/* ---------- app (Tribes) ---------- */
.app-hero { position: relative; overflow: hidden; padding-block: 3.5rem 0; border-bottom: 1px solid var(--line); }
.app-mark { text-align: center; }
.wordmark { font-family: var(--serif); font-size: clamp(3rem, 7vw, 4.4rem); line-height: 1; letter-spacing: -0.03em; color: var(--heading); margin: 0 0 0.6rem; }
.wordmark-dot { color: var(--accent); }
.app-kicker { font-family: var(--sans); color: var(--muted); font-size: 1.05rem; margin: 0; }
.app-kicker em { font-family: var(--serif); color: var(--text); }
.app-hero-grid { display: grid; grid-template-columns: minmax(0, 1.15fr) minmax(0, 0.85fr); gap: 3rem; align-items: center; margin-top: 3.5rem; }
.app-copy { padding-bottom: 4.5rem; }
.app-headline { font-family: var(--sans); font-weight: 600; font-size: clamp(2.5rem, 5.6vw, 4.1rem); line-height: 1.04; letter-spacing: -0.035em; margin-bottom: 1.75rem; }
.app-headline em { font-family: var(--serif); font-weight: 400; letter-spacing: -0.02em; }
.app-sub { font-family: var(--sans); color: var(--muted); font-size: 1.08rem; line-height: 1.65; max-width: 30rem; }
.app-cta { display: grid; justify-items: start; gap: 0.9rem; margin-top: 2rem; }
.btn { display: inline-flex; align-items: center; gap: 0.5rem; border-radius: 999px; padding: 1rem 1.8rem; }
.app-fine { font-family: var(--sans); font-size: 0.8rem; color: var(--muted); margin: 0; }

.phone { position: relative; margin: 0 auto; width: min(19rem, 100%); align-self: end; }
.phone::before { /* warm halo behind the device */
  content: ""; position: absolute; inset: -12% -40% -10% -40%; z-index: -1;
  background:
    radial-gradient(38% 30% at 30% 35%, rgba(200, 169, 110, 0.16), transparent 70%),
    radial-gradient(30% 26% at 75% 65%, rgba(200, 169, 110, 0.11), transparent 70%);
}
.phone-screen {
  background: #141414; color: var(--text); border: 10px solid #2c2a25; border-bottom: 0;
  border-radius: 2.6rem 2.6rem 0 0; padding: 0.9rem 1.1rem 0; font-family: var(--sans);
  box-shadow: 0 0 0 1px #3a372f, 0 30px 60px rgba(0, 0, 0, 0.5);
  display: grid; gap: 0.85rem;
}
.ph-status { display: flex; justify-content: space-between; align-items: center; font-size: 0.68rem; font-weight: 600; color: var(--heading); }
.ph-island { width: 5.2rem; height: 1.25rem; border-radius: 1rem; background: #000; }
.ph-icons { letter-spacing: -0.15em; font-size: 0.5rem; }
.ph-head { display: flex; justify-content: space-between; align-items: center; margin-top: 0.4rem; }
.ph-title { font-family: var(--serif); font-size: 1.25rem; color: var(--heading); }
.ph-streak { font-size: 0.62rem; font-weight: 600; color: var(--accent); background: var(--accent-soft); padding: 0.25rem 0.55rem; border-radius: 999px; }
.ph-goal { display: grid; gap: 0.25rem; background: #1f1e1a; border: 1px solid #2d2b25; border-radius: 0.9rem; padding: 0.8rem 0.9rem; }
.ph-label { font-size: 0.56rem; font-weight: 600; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.ph-goal-text { font-family: var(--serif); font-size: 0.86rem; line-height: 1.4; color: var(--heading); }
.ph-today { margin-bottom: -0.35rem; }
.ph-members { list-style: none; margin: 0; padding: 0; display: grid; gap: 0.55rem; }
.ph-members li { display: grid; grid-template-columns: 1.6rem minmax(0, 1fr) 2.9rem; align-items: center; gap: 0.6rem; }
.ph-avatar { width: 1.6rem; height: 1.6rem; border-radius: 50%; display: grid; place-items: center; font-size: 0.62rem; font-weight: 600; color: var(--accent-ink); }
.a1 { background: #c8a96e; } .a2 { background: #a8b89a; } .a3 { background: #d39a7c; } .a4 { background: #9fb3c8; }
.ph-bar { height: 0.42rem; border-radius: 999px; background: #2a2822; overflow: hidden; }
.ph-bar span { display: block; height: 100%; border-radius: inherit; background: var(--accent); }
.ph-num { font-size: 0.64rem; text-align: right; color: var(--muted); font-variant-numeric: tabular-nums; }
.ph-pillars { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.ph-pillars span { font-size: 0.58rem; font-weight: 500; padding: 0.28rem 0.55rem; border-radius: 999px; border: 1px solid #34312a; color: var(--muted); }
.ph-pillars .done { background: var(--accent-soft); border-color: var(--accent-line); color: var(--accent); }
.ph-pillars .done::before { content: "✓ "; }
.ph-button { background: var(--accent); color: var(--accent-ink); text-align: center; font-size: 0.78rem; font-weight: 600; padding: 0.65rem; border-radius: 999px; }
.ph-tabbar { display: flex; justify-content: space-around; border-top: 1px solid #2a2822; padding-block: 0.7rem 1.1rem; font-size: 0.6rem; color: var(--muted); }
.ph-tabbar .on { color: var(--heading); font-weight: 600; }

.app-proof { background: var(--band); border-bottom: 1px solid var(--line); padding-block: 4.75rem; }
.proof-statement { font-size: clamp(1.5rem, 3.2vw, 2.2rem); line-height: 1.35; color: var(--heading); max-width: 40rem; margin-bottom: 2.75rem; text-wrap: balance; }
.proof-statement em { color: var(--accent); }
.proof-stats { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 2.5rem; max-width: 52rem; }
.stat { display: grid; gap: 0.6rem; align-content: start; padding-top: 1.25rem; border-top: 1px solid var(--line); }
.stat-num { font-size: clamp(3rem, 7vw, 4.4rem); line-height: 1; color: var(--accent); font-variant-numeric: tabular-nums lining-nums; }
.stat:last-child .stat-num { color: var(--muted); }
.stat-text { color: var(--text); font-size: 1.02rem; }
.cite { font-family: var(--sans); font-size: 0.76rem; color: var(--muted); margin: 2.5rem 0 0; max-width: 46rem; line-height: 1.6; }

.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: 1.25rem; }
.step { background: var(--raised); border: 1px solid var(--line); padding: 1.75rem 1.6rem; }
.step-num { display: grid; place-items: center; width: 2rem; height: 2rem; border-radius: 50%; border: 1px solid var(--accent-line); color: var(--accent); font-family: var(--sans); font-weight: 600; font-size: 0.85rem; margin-bottom: 1.25rem; }
.step h3 { font-family: var(--sans); font-size: 1.12rem; margin-bottom: 0.6rem; }
.step p { color: var(--muted); font-size: 0.98rem; margin: 0; }

.pillars { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(5, minmax(0, 1fr)); border-block: 1px solid var(--line); }
.pillars li { display: grid; gap: 0.4rem; align-content: start; padding: 1.75rem 1.25rem; }
.pillars li + li { border-left: 1px solid var(--line); }
.pillar-name { font-family: var(--sans); font-weight: 600; color: var(--heading); }
.pillar-desc { color: var(--muted); font-size: 0.95rem; line-height: 1.55; }

.app-pair { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 4.5rem; }
.pair-block p { color: var(--text); }
.signature { font-style: italic; color: var(--accent); }

.app-final { border-top: 1px solid var(--line); text-align: center; padding-block: 5rem 5.5rem; }
.app-final-head { font-family: var(--serif); font-weight: 400; font-size: clamp(2rem, 4.6vw, 3rem); margin-bottom: 2rem; }

/* ---------- 404 ---------- */
.not-found { min-height: 40vh; }
.not-found h1 { font-family: var(--serif); font-weight: 400; font-size: 2.6rem; margin-bottom: 1.25rem; }
.not-found a { border-bottom: 1px solid var(--accent-line); }

/* ---------- footer ---------- */
.site-footer { border-top: 1px solid var(--line); margin-top: 5rem; padding-block: 2.75rem 3.25rem; font-family: var(--sans); }
.footer-inner { max-width: calc(var(--wide) + 2 * var(--gutter)); margin-inline: auto; padding-inline: var(--gutter); display: flex; flex-wrap: wrap; justify-content: space-between; gap: 1.25rem 2rem; }
.footer-copy { font-size: 0.8rem; color: var(--muted); margin: 0; }
.footer-links { display: flex; flex-wrap: wrap; gap: 0.6rem 1.4rem; list-style: none; margin: 0; padding: 0; font-size: 0.8rem; }
.footer-links a { color: var(--muted); }
.footer-links a:hover { color: var(--heading); }

/* ---------- responsive ---------- */
@media (max-width: 900px) {
  .intro-grid, .app-hero-grid, .split, .app-pair { grid-template-columns: minmax(0, 1fr); gap: 3rem; }
  .intro { max-width: none; }
  .app-copy { padding-bottom: 0; }
  .pillars { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .pillars li { border-left: 0 !important; border-top: 1px solid var(--line); }
  .pillars li:nth-child(-n+2) { border-top: 0; }
  .pillars li:nth-child(even) { border-left: 1px solid var(--line) !important; }
  .pillars li:last-child { grid-column: 1 / -1; }
  .steps { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 720px) {
  html { font-size: 17px; }
  .nav { grid-template-columns: 1fr auto; grid-template-areas: "brand about" "main main"; row-gap: 1.1rem; padding-block: 1.25rem 0.9rem; }
  .brand { grid-area: brand; }
  .nav-about { grid-area: about; }
  .nav-main { grid-area: main; gap: 1.4rem; overflow-x: auto; scrollbar-width: none; }
  .band { padding-block: 3rem 3.5rem; }
  .topic-cols, .proof-stats { grid-template-columns: minmax(0, 1fr); gap: 2.5rem; }
  .format { grid-template-columns: minmax(0, 1fr); }
  .format-part { grid-template-columns: 3.5rem minmax(0, 1fr); justify-items: start; text-align: left; column-gap: 1.25rem; row-gap: 0.2rem; padding: 1.5rem 0; }
  .format-part + .format-part { border-left: 0; border-top: 1px solid var(--line); }
  .format-num { grid-row: span 2; font-size: 3rem; }
  .issue-year { grid-template-columns: minmax(0, 1fr); gap: 0.5rem; }
  .pager { grid-template-columns: minmax(0, 1fr); }
  .pager .next { grid-column: 1; }
  .section { margin-block: 3.5rem; }
}
@media (max-width: 480px) {
  .pillars { grid-template-columns: minmax(0, 1fr); }
  .pillars li { border-left: 0 !important; border-top: 1px solid var(--line) !important; }
  .pillars li:first-child { border-top: 0 !important; }
  .pillars li:last-child { grid-column: auto; }
  .nav-main { gap: 1.1rem; }
  .nav-main a { font-size: 0.85rem; }
}
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition: none !important; scroll-behavior: auto !important; }
}