/* =========================================================
   Adrian Krion — Design System
   Editorial, restrained, founder-advisor
   ========================================================= */

/* ----- Fonts ----- */
@import url('https://fonts.googleapis.com/css2?family=Instrument+Serif:ital@0;1&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ----- Design Tokens ----- */
:root {
  /* Light (default, warm editorial) */
  --bg:           #F7F5F1;
  --bg-elev:     #FFFFFF;
  --bg-inverse:  #111110;
  --text:         #141412;
  --text-muted:   #5C5A55;
  --text-soft:    #8A8780;
  --text-inverse: #F7F5F1;
  --border:       #E4DFD5;
  --border-strong:#C9C3B6;
  --accent:       #B14A1E; /* muted terracotta */
  --accent-ink:   #7A3112;
  --focus:        #1E3A8A;

  /* Typography */
  --font-serif: "Instrument Serif", ui-serif, Georgia, "Times New Roman", serif;
  --font-sans:  "Inter", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono:  "JetBrains Mono", ui-monospace, SFMono-Regular, Menlo, monospace;

  /* Scale */
  --step--1: clamp(0.83rem, 0.80rem + 0.15vw, 0.9rem);
  --step-0:  clamp(1.00rem, 0.97rem + 0.20vw, 1.08rem);
  --step-1:  clamp(1.18rem, 1.10rem + 0.40vw, 1.35rem);
  --step-2:  clamp(1.45rem, 1.30rem + 0.75vw, 1.75rem);
  --step-3:  clamp(1.80rem, 1.55rem + 1.20vw, 2.35rem);
  --step-4:  clamp(2.30rem, 1.90rem + 2.00vw, 3.35rem);
  --step-5:  clamp(3.00rem, 2.30rem + 3.50vw, 5.25rem);
  --step-6:  clamp(3.75rem, 2.80rem + 4.75vw, 6.75rem);

  /* Space */
  --sp-1: 0.25rem;
  --sp-2: 0.5rem;
  --sp-3: 0.75rem;
  --sp-4: 1rem;
  --sp-5: 1.5rem;
  --sp-6: 2rem;
  --sp-7: 3rem;
  --sp-8: 4.5rem;
  --sp-9: 6.5rem;
  --sp-10: 9rem;

  /* Layout */
  --max-w: 1200px;
  --max-read: 68ch;
  --radius: 2px;
  --radius-lg: 6px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --dur-1: 180ms;
  --dur-2: 360ms;
  --dur-3: 700ms;
}

[data-theme="dark"] {
  --bg:           #0E0E0C;
  --bg-elev:      #181816;
  --bg-inverse:   #F7F5F1;
  --text:         #F2EEE5;
  --text-muted:   #A8A39A;
  --text-soft:    #7A756D;
  --text-inverse: #141412;
  --border:       #2A2824;
  --border-strong:#3C3A35;
  --accent:       #E07745;
  --accent-ink:   #F5A373;
}

/* ----- Reset ----- */
*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body, h1, h2, h3, h4, h5, h6, p, figure, blockquote, dl, dd, ul, ol { margin: 0; padding: 0; }
ul, ol { list-style: none; }
img, picture, svg, video { display: block; max-width: 100%; }
button, input, textarea, select { font: inherit; color: inherit; }
button { background: none; border: 0; cursor: pointer; }
a { color: inherit; text-decoration: none; }

html {
  scroll-behavior: smooth;
  color-scheme: light dark;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  font-weight: 400;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  transition: background var(--dur-2) var(--ease), color var(--dur-2) var(--ease);
}

/* ----- Focus ----- */
:focus-visible {
  outline: 2px solid var(--focus);
  outline-offset: 3px;
  border-radius: var(--radius);
}

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

.container--narrow {
  max-width: 860px;
}

.container--prose {
  max-width: 720px;
}

section {
  padding-block: clamp(3.5rem, 7vw, 7rem);
}

.section-divider {
  border-top: 1px solid var(--border);
}

/* Eyebrow labels */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  margin-bottom: var(--sp-5);
}

.eyebrow::before {
  content: "";
  width: 28px;
  height: 1px;
  background: var(--border-strong);
}

/* Typography */
h1, h2, h3, h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  color: var(--text);
  line-height: 1.05;
  letter-spacing: -0.01em;
}

h1 { font-size: var(--step-5); letter-spacing: -0.025em; }
h2 { font-size: var(--step-4); letter-spacing: -0.02em; line-height: 1.08; }
h3 { font-size: var(--step-2); letter-spacing: -0.01em; line-height: 1.2; }
h4 { font-size: var(--step-1); font-family: var(--font-sans); font-weight: 500; letter-spacing: -0.005em; line-height: 1.3; }

p { max-width: var(--max-read); }
p + p { margin-top: 1em; }

strong { font-weight: 600; color: var(--text); }
em { font-style: italic; }

.lead {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  line-height: 1.35;
  color: var(--text);
  max-width: 34ch;
  font-style: italic;
}

.dek {
  font-size: var(--step-1);
  color: var(--text-muted);
  line-height: 1.5;
  max-width: 52ch;
  font-weight: 400;
}

.small, small {
  font-size: var(--step--1);
  color: var(--text-muted);
}

/* Inline link */
.link, .prose a {
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.link:hover, .prose a:hover {
  color: var(--accent);
  border-color: var(--accent);
}

/* ----- Header / Nav ----- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%) blur(12px);
  -webkit-backdrop-filter: saturate(140%) blur(12px);
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  border-bottom: 1px solid transparent;
  transition: border-color var(--dur-2) var(--ease), background var(--dur-2) var(--ease);
}
.site-header.is-scrolled {
  border-bottom-color: var(--border);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-5);
  padding-block: 1.1rem;
}

.brand {
  font-family: var(--font-serif);
  font-size: 1.35rem;
  letter-spacing: -0.01em;
  display: inline-flex;
  align-items: baseline;
  gap: 0.35rem;
}
.brand .dot {
  display: inline-block;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
  transform: translateY(-2px);
}

.nav-links {
  display: none;
  gap: var(--sp-6);
  align-items: center;
}

.nav-links a {
  font-size: 0.92rem;
  color: var(--text-muted);
  position: relative;
  padding-block: 0.25rem;
  transition: color var(--dur-1) var(--ease);
}
.nav-links a:hover,
.nav-links a[aria-current="page"] {
  color: var(--text);
}
.nav-links a[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -6px;
  height: 1px;
  background: var(--accent);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
}

.theme-toggle {
  width: 36px; height: 36px;
  display: inline-grid;
  place-items: center;
  border-radius: 50%;
  color: var(--text-muted);
  transition: color var(--dur-1) var(--ease), background var(--dur-1) var(--ease);
}
.theme-toggle:hover { color: var(--text); background: color-mix(in srgb, var(--text) 6%, transparent); }
.theme-toggle svg { width: 18px; height: 18px; }
.theme-toggle .icon-sun { display: none; }
[data-theme="dark"] .theme-toggle .icon-sun { display: block; }
[data-theme="dark"] .theme-toggle .icon-moon { display: none; }

/* Mobile nav */
.nav-toggle {
  display: inline-grid;
  place-items: center;
  width: 36px; height: 36px;
  color: var(--text);
}
.nav-toggle svg { width: 20px; height: 20px; }

.mobile-nav {
  position: fixed;
  inset: 0;
  background: var(--bg);
  z-index: 100;
  transform: translateY(-100%);
  /* Hard-hide when closed so a tall (overflowing) menu can't leak its
     bottom-anchored content over the header. Delay hiding until the
     slide-out finishes. */
  visibility: hidden;
  pointer-events: none;
  overflow-y: auto;
  transition: transform var(--dur-2) var(--ease), visibility 0s linear var(--dur-2);
  padding: var(--sp-5);
  display: flex;
  flex-direction: column;
}
.mobile-nav.is-open {
  transform: translateY(0);
  visibility: visible;
  pointer-events: auto;
  transition: transform var(--dur-2) var(--ease), visibility 0s linear 0s;
}

.mobile-nav-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: 0.4rem;
}

.mobile-nav ul {
  margin-top: var(--sp-7);
  display: flex;
  flex-direction: column;
  gap: var(--sp-4);
}
.mobile-nav ul a {
  font-family: var(--font-serif);
  font-size: var(--step-3);
  color: var(--text);
  display: inline-block;
  padding-block: 0.35rem;
}
.mobile-nav ul a[aria-current="page"] { color: var(--accent); }

.mobile-nav .nav-foot {
  margin-top: auto;
  padding-top: var(--sp-6);
  border-top: 1px solid var(--border);
  color: var(--text-muted);
  font-size: var(--step--1);
  display: flex;
  justify-content: space-between;
}

@media (min-width: 820px) {
  .nav-links { display: flex; }
  .nav-toggle { display: none; }
}

/* ----- Buttons ----- */
.btn {
  --btn-bg: var(--text);
  --btn-fg: var(--bg);
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.85rem 1.35rem;
  font-size: 0.92rem;
  font-weight: 500;
  letter-spacing: 0.005em;
  border-radius: 999px;
  background: var(--btn-bg);
  color: var(--btn-fg);
  border: 1px solid var(--btn-bg);
  transition: transform var(--dur-1) var(--ease), background var(--dur-1) var(--ease), color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
  white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn:active { transform: translateY(0); }

.btn .arrow {
  transition: transform var(--dur-1) var(--ease);
}
.btn:hover .arrow { transform: translate(3px, -3px); }

.btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text);
  border-color: var(--border-strong);
}
.btn--ghost:hover {
  --btn-bg: var(--text);
  --btn-fg: var(--bg);
}

.btn--accent {
  --btn-bg: var(--accent);
  --btn-fg: #fff;
}

.cta-row {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-3);
  margin-top: var(--sp-6);
}

/* Link with arrow */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 500;
  color: var(--text);
  border-bottom: 1px solid var(--border-strong);
  padding-bottom: 2px;
  transition: color var(--dur-1) var(--ease), border-color var(--dur-1) var(--ease);
}
.link-arrow:hover { color: var(--accent); border-color: var(--accent); }
.link-arrow .arrow { transition: transform var(--dur-1) var(--ease); }
.link-arrow:hover .arrow { transform: translate(3px, -3px); }

/* ----- Hero ----- */
.hero {
  padding-block: clamp(4rem, 10vw, 9rem) clamp(3rem, 6vw, 5rem);
}

.hero__name {
  font-family: var(--font-serif);
  font-size: clamp(3.25rem, 2.3rem + 5.2vw, 7rem);
  line-height: 0.98;
  letter-spacing: -0.03em;
  max-width: 16ch;
}

.hero__name em {
  font-style: italic;
  color: var(--accent);
}

.hero__dek {
  margin-top: var(--sp-6);
  font-size: var(--step-2);
  color: var(--text-muted);
  line-height: 1.35;
  max-width: 46ch;
  font-weight: 300;
}

.hero__meta {
  margin-top: var(--sp-7);
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-5) var(--sp-7);
  color: var(--text-muted);
  font-size: var(--step--1);
}

.hero__meta dt {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.68rem;
  color: var(--text-soft);
  margin-bottom: 0.3rem;
}
.hero__meta dd { color: var(--text); font-weight: 500; }

/* ----- Proof strip ----- */
.proof {
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  padding-block: var(--sp-6);
}

.proof-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--sp-5) var(--sp-6);
  align-items: start;
}

.proof-item {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
  font-size: var(--step--1);
}
.proof-item b {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--step-1);
  color: var(--text);
  line-height: 1.15;
}
.proof-item span {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.66rem;
  color: var(--text-soft);
}

@media (min-width: 700px) {
  .proof-grid { grid-template-columns: repeat(4, 1fr); }
}

/* ----- Section headers ----- */
.section-header {
  display: grid;
  gap: var(--sp-5);
  margin-bottom: var(--sp-7);
}

.section-header h2 { max-width: 22ch; }

.section-header p.dek { margin: 0; }

@media (min-width: 900px) {
  .section-header--split {
    grid-template-columns: 1fr 1fr;
    gap: var(--sp-7);
    align-items: end;
  }
}

/* ----- Numbered list / areas ----- */
.areas {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}

.area {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-3);
  padding-block: clamp(1.75rem, 3vw, 2.5rem);
  border-bottom: 1px solid var(--border);
}

.area__num {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.12em;
  color: var(--text-soft);
}

.area__title {
  font-family: var(--font-serif);
  font-size: var(--step-3);
  line-height: 1.1;
  letter-spacing: -0.015em;
}

.area__body {
  color: var(--text-muted);
  max-width: 60ch;
}

.area__list {
  margin-top: var(--sp-4);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-2);
  font-size: 0.93rem;
}
.area__list li {
  padding-left: 1.25rem;
  position: relative;
  color: var(--text);
}
.area__list li::before {
  content: "";
  position: absolute;
  left: 0; top: 0.7em;
  width: 8px; height: 1px;
  background: var(--border-strong);
}

@media (min-width: 820px) {
  .area {
    grid-template-columns: 140px 1fr 1fr;
    gap: var(--sp-6);
    align-items: baseline;
  }
  .area__list { grid-template-columns: repeat(2, 1fr); gap: var(--sp-2) var(--sp-5); }
}

/* ----- Cards ----- */
.card-grid {
  display: grid;
  gap: var(--sp-5);
}
@media (min-width: 700px) { .card-grid { grid-template-columns: repeat(2, 1fr); } }
@media (min-width: 1000px) { .card-grid--3 { grid-template-columns: repeat(3, 1fr); } }

.card {
  display: flex;
  flex-direction: column;
  gap: var(--sp-3);
  padding: var(--sp-6);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color var(--dur-1) var(--ease), transform var(--dur-2) var(--ease);
  min-height: 100%;
}
.card:hover { border-color: var(--border-strong); }
a.card:hover { transform: translateY(-3px); }

.card__meta {
  display: flex;
  gap: var(--sp-3);
  align-items: center;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}

.card h3 {
  font-size: var(--step-2);
  line-height: 1.15;
}

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

.card__foot {
  margin-top: auto;
  padding-top: var(--sp-3);
  font-size: 0.88rem;
  color: var(--text);
}

/* ----- Split content ----- */
.split {
  display: grid;
  gap: var(--sp-6);
  align-items: start;
}
@media (min-width: 860px) {
  .split { grid-template-columns: 1fr 1.25fr; gap: var(--sp-8); }
  .split--reverse { grid-template-columns: 1.25fr 1fr; }
}

.split h2 { max-width: 14ch; }
.split .prose { max-width: 60ch; color: var(--text); }
.split .prose p { color: var(--text-muted); }
.split .prose p + p { margin-top: 1.25em; }

/* ----- Experience blocks ----- */
.experience {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}
.experience__item {
  padding-block: clamp(2rem, 3.5vw, 3rem);
  border-bottom: 1px solid var(--border);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--sp-4);
}
.experience__meta {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}
.experience__meta .sep { color: var(--border-strong); }

.experience__title {
  font-family: var(--font-serif);
  font-size: var(--step-3);
  line-height: 1.1;
  letter-spacing: -0.015em;
  max-width: 22ch;
}
.experience__body p { color: var(--text-muted); max-width: 62ch; }
.experience__tags {
  display: flex;
  flex-wrap: wrap;
  gap: var(--sp-2);
  margin-top: var(--sp-3);
}
.experience__tags span {
  font-size: 0.78rem;
  color: var(--text-muted);
  padding: 0.3rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: 999px;
}

@media (min-width: 860px) {
  .experience__item { grid-template-columns: 200px 1fr; gap: var(--sp-6); }
}

/* ----- Principles grid ----- */
.principles {
  display: grid;
  gap: var(--sp-5);
  border-top: 1px solid var(--border);
  padding-top: var(--sp-7);
}
.principle {
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
}
.principle:first-child { border-top: 0; padding-top: 0; }
.principle__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.14em;
  color: var(--text-soft);
  margin-bottom: var(--sp-2);
}
.principle h3 {
  font-size: var(--step-2);
  margin-bottom: var(--sp-2);
  line-height: 1.15;
}
.principle p { color: var(--text-muted); }
@media (min-width: 780px) {
  .principles { grid-template-columns: repeat(2, 1fr); gap: var(--sp-6) var(--sp-7); }
  .principle { border-top: 0; padding-top: 0; }
}
@media (min-width: 1040px) {
  .principles { grid-template-columns: repeat(4, 1fr); }
}

/* ----- Final CTA ----- */
.final-cta {
  background: var(--bg-inverse);
  color: var(--text-inverse);
  padding-block: clamp(4rem, 8vw, 7rem);
  position: relative;
  overflow: hidden;
}

.final-cta::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 20% 20%, color-mix(in srgb, var(--accent) 30%, transparent) 0%, transparent 55%),
    radial-gradient(circle at 80% 80%, color-mix(in srgb, var(--accent) 18%, transparent) 0%, transparent 55%);
  opacity: 0.7;
  pointer-events: none;
}

.final-cta .container { position: relative; }

.final-cta h2 {
  color: var(--text-inverse);
  font-size: clamp(2.25rem, 1.6rem + 3vw, 4rem);
  max-width: 20ch;
  line-height: 1.05;
}

.final-cta .dek { color: color-mix(in srgb, var(--text-inverse) 70%, transparent); }

.final-cta .btn {
  --btn-bg: var(--text-inverse);
  --btn-fg: var(--bg-inverse);
}
.final-cta .btn--ghost {
  --btn-bg: transparent;
  --btn-fg: var(--text-inverse);
  border-color: color-mix(in srgb, var(--text-inverse) 30%, transparent);
}
.final-cta .btn--ghost:hover {
  --btn-bg: var(--text-inverse);
  --btn-fg: var(--bg-inverse);
}

/* ----- Footer ----- */
.site-footer {
  background: var(--bg);
  border-top: 1px solid var(--border);
  padding-block: var(--sp-8) var(--sp-6);
}
.footer-grid {
  display: grid;
  gap: var(--sp-6);
}
@media (min-width: 800px) {
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; gap: var(--sp-7); }
}

.footer-brand h4 {
  font-family: var(--font-serif);
  font-weight: 400;
  font-size: var(--step-2);
  letter-spacing: -0.01em;
  margin-bottom: var(--sp-3);
}
.footer-brand p { color: var(--text-muted); max-width: 40ch; font-size: 0.93rem; }

.footer-col h5 {
  font-family: var(--font-mono);
  text-transform: uppercase;
  letter-spacing: 0.14em;
  font-size: 0.72rem;
  color: var(--text-soft);
  margin-bottom: var(--sp-4);
  font-weight: 500;
}
.footer-col ul { display: flex; flex-direction: column; gap: var(--sp-2); }
.footer-col a {
  color: var(--text);
  font-size: 0.95rem;
  border-bottom: 1px solid transparent;
  padding-bottom: 2px;
  transition: border-color var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.footer-col a:hover { color: var(--accent); border-bottom-color: var(--accent); }

.footer-bottom {
  margin-top: var(--sp-7);
  padding-top: var(--sp-4);
  border-top: 1px solid var(--border);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--sp-3);
  color: var(--text-soft);
  font-size: var(--step--1);
}

/* ----- Forms ----- */
.form {
  display: grid;
  gap: var(--sp-5);
  max-width: 640px;
}
.form-row { display: grid; gap: var(--sp-5); }
@media (min-width: 640px) {
  .form-row--2 { grid-template-columns: 1fr 1fr; }
}

.field { display: grid; gap: 0.45rem; }
.field label {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}
.field input,
.field textarea,
.field select {
  width: 100%;
  border: 0;
  border-bottom: 1px solid var(--border-strong);
  padding: 0.6rem 0;
  background: transparent;
  font-size: var(--step-0);
  color: var(--text);
  transition: border-color var(--dur-1) var(--ease);
  appearance: none;
}
.field input:focus,
.field textarea:focus,
.field select:focus {
  outline: none;
  border-bottom-color: var(--accent);
}
.field textarea { min-height: 140px; resize: vertical; line-height: 1.55; }
.field--full { grid-column: 1 / -1; }

.form-note {
  color: var(--text-muted);
  font-size: var(--step--1);
}

/* ----- Article / Prose ----- */
.article-list {
  display: grid;
  gap: 0;
  border-top: 1px solid var(--border);
}
.article-item {
  padding-block: clamp(1.5rem, 2.2vw, 2rem);
  border-bottom: 1px solid var(--border);
  display: grid;
  gap: var(--sp-3);
  grid-template-columns: 1fr;
  align-items: baseline;
  transition: background var(--dur-1) var(--ease);
  margin-inline: calc(-1 * var(--sp-3));
  padding-inline: var(--sp-3);
}
.article-item:hover { background: color-mix(in srgb, var(--text) 3%, transparent); }
.article-item .meta {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text-soft);
}
.article-item h3 {
  font-size: var(--step-2);
  line-height: 1.15;
  letter-spacing: -0.015em;
}
.article-item .dek { font-size: 0.95rem; max-width: 60ch; }
.article-item .arrow-wrap { justify-self: end; color: var(--text-muted); }

@media (min-width: 860px) {
  .article-item { grid-template-columns: 120px 1fr auto; gap: var(--sp-6); }
}

/* ----- Topics (Speaking) ----- */
.topics {
  display: grid;
  gap: var(--sp-3);
}
.topic {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--sp-4);
  padding: 1.1rem 0;
  border-bottom: 1px solid var(--border);
}
.topic:first-child { border-top: 1px solid var(--border); }
.topic__title {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  line-height: 1.15;
  letter-spacing: -0.01em;
}
.topic__num {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-soft);
  letter-spacing: 0.14em;
}

/* ----- Intro / Hero for subpages ----- */
.page-hero {
  padding-block: clamp(4rem, 8vw, 7rem) clamp(2.5rem, 4vw, 4rem);
}
.page-hero h1 {
  font-size: clamp(2.75rem, 2rem + 4vw, 5.5rem);
  line-height: 1;
  letter-spacing: -0.028em;
  max-width: 18ch;
}
.page-hero .dek { margin-top: var(--sp-5); font-size: var(--step-2); color: var(--text-muted); max-width: 48ch; }

/* ----- Inline marks / abstract visuals ----- */
.abstract-mark {
  width: 100%;
  aspect-ratio: 1 / 1;
  background:
    radial-gradient(circle at 30% 30%, color-mix(in srgb, var(--accent) 18%, transparent), transparent 55%),
    linear-gradient(135deg, color-mix(in srgb, var(--text) 8%, transparent), color-mix(in srgb, var(--text) 2%, transparent));
  border-radius: var(--radius-lg);
  border: 1px solid var(--border);
  position: relative;
  overflow: hidden;
}
.abstract-mark::before,
.abstract-mark::after {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(to right, color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px),
    linear-gradient(to bottom, color-mix(in srgb, var(--text) 5%, transparent) 1px, transparent 1px);
  background-size: 32px 32px;
  opacity: 0.5;
}
.abstract-mark::after {
  background: radial-gradient(circle at 70% 70%, color-mix(in srgb, var(--accent) 30%, transparent), transparent 40%);
  mix-blend-mode: multiply;
}

/* ----- Animations ----- */
[data-animate] {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity var(--dur-3) var(--ease), transform var(--dur-3) var(--ease);
}
[data-animate].is-visible {
  opacity: 1;
  transform: none;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  [data-animate] { opacity: 1; transform: none; }
  html { scroll-behavior: auto; }
}

/* ----- Skip link ----- */
.skip {
  position: absolute;
  left: 0; top: 0;
  padding: 0.75rem 1rem;
  background: var(--text);
  color: var(--bg);
  transform: translateY(-150%);
  z-index: 1000;
}
.skip:focus { transform: translateY(0); }

/* ----- Utilities ----- */
.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px;
  overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}
.muted { color: var(--text-muted); }
.serif { font-family: var(--font-serif); }
.mono { font-family: var(--font-mono); }
.flow > * + * { margin-top: var(--sp-4); }
.divider { height: 1px; background: var(--border); }

/* =========================================================
   Signal — daily AI & tech briefing
   ========================================================= */
.signal-updated {
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--text-soft);
  letter-spacing: 0.02em;
  margin-top: var(--sp-5);
}

.signal-intro-wrap { padding-block: var(--sp-6); }
.signal-intro {
  font-family: var(--font-serif);
  font-size: var(--step-2);
  line-height: 1.4;
  max-width: 60ch;
  color: var(--text);
}

.signal-list {
  display: grid;
  gap: 0;
  margin-top: var(--sp-5);
  border-top: 1px solid var(--border);
}

.signal-item {
  display: grid;
  gap: var(--sp-2);
  padding-block: var(--sp-5);
  border-bottom: 1px solid var(--border);
}

.signal-item__meta {
  display: flex;
  align-items: center;
  gap: var(--sp-3);
  font-family: var(--font-mono);
  font-size: var(--step--1);
  color: var(--text-soft);
}
.signal-item__source { color: var(--accent); font-weight: 500; }
.signal-item__date { position: relative; padding-left: var(--sp-3); }
.signal-item__date::before {
  content: "";
  position: absolute; left: 0; top: 50%;
  width: 3px; height: 3px; border-radius: 50%;
  background: var(--border-strong); transform: translateY(-50%);
}

.signal-item__title {
  font-size: var(--step-2);
  line-height: 1.25;
  font-weight: 500;
  letter-spacing: -0.01em;
}
.signal-item__title a {
  display: inline;
  transition: color var(--dur-1) var(--ease);
}
.signal-item__title a:hover { color: var(--accent); }
.signal-item__title .arrow {
  display: inline-block;
  vertical-align: baseline;
  color: var(--text-soft);
  transition: transform var(--dur-1) var(--ease), color var(--dur-1) var(--ease);
}
.signal-item__title a:hover .arrow {
  color: var(--accent);
  transform: translate(2px, -2px);
}

.signal-item__summary {
  color: var(--text-muted);
  max-width: 72ch;
}

.signal-colophon { color: var(--text-soft); }

/* ----- Newsletter subscribe ----- */
.signal-subscribe {
  display: grid;
  grid-template-columns: 1.1fr 1fr;
  gap: var(--sp-6);
  align-items: center;
  padding: var(--sp-7);
  background: var(--bg-elev);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
}
.signal-subscribe h2 { margin-top: var(--sp-2); }
.signal-subscribe .dek { margin-top: var(--sp-3); }
.subscribe-form {
  display: flex;
  gap: var(--sp-3);
  flex-wrap: wrap;
}
.subscribe-form input[type="email"] {
  flex: 1 1 12rem;
  min-width: 0;
  padding: 0.85rem 1.1rem;
  background: var(--bg);
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--text);
}
.subscribe-form input[type="email"]::placeholder { color: var(--text-soft); }
.subscribe-form input[type="email"]:focus-visible { outline: 2px solid var(--focus); outline-offset: 2px; }
.subscribe-form .btn { flex: 0 0 auto; }

.subscribe-status {
  min-height: 1.2em;
  margin-top: var(--sp-3);
  font-size: var(--step--1);
  color: var(--text-soft);
}
.subscribe-status.is-success { color: var(--accent); }
.subscribe-status.is-error { color: #b42318; }
[data-theme="dark"] .subscribe-status.is-error { color: #f97066; }

@media (max-width: 720px) {
  .signal-subscribe { grid-template-columns: 1fr; padding: var(--sp-6); }
}