/* ─────────────────────────────────────────────────────────────────
   Newton Technology — newtontechnology.com
   Aesthetic: scientific-instrument minimalism, brushed-metal accents,
   editorial typography (Fraunces display + Geist body + Geist Mono).
   ───────────────────────────────────────────────────────────────── */

/* ────────────────── Tokens ────────────────── */
:root {
  --bg: #0a0a0b;
  --bg-2: #0d0d0f;
  --surface: #131316;
  --elevated: #1a1a1d;
  --border: #26262a;
  --border-strong: #3a3a3f;
  --hairline: rgba(255, 255, 255, 0.08);
  --hairline-strong: rgba(255, 255, 255, 0.18);

  --text: #f3f3f5;
  --text-muted: #9c9ca2;
  --text-dim: #5e5e64;

  --silver-1: #ececef;
  --silver-2: #b6b6bc;
  --silver-3: #7a7a80;

  --accent: #d8d8dc;
  --accent-soft: rgba(216, 216, 220, 0.08);

  --grain-opacity: 0.06;
  --vignette: radial-gradient(120% 80% at 50% -10%, rgba(255,255,255,0.04), transparent 60%);

  --font-display: "Fraunces", "Cambria", "Georgia", serif;
  --font-body: "Geist", "Söhne", "Helvetica Neue", system-ui, sans-serif;
  --font-mono: "Geist Mono", "JetBrains Mono", ui-monospace, "SFMono-Regular", Menlo, monospace;

  --shadow-1: 0 1px 0 rgba(255, 255, 255, 0.04) inset, 0 8px 24px rgba(0, 0, 0, 0.4);
  --shadow-2: 0 1px 0 rgba(255, 255, 255, 0.05) inset, 0 24px 60px -20px rgba(0, 0, 0, 0.6);

  --col-max: 1240px;
  --pad-x: clamp(20px, 4vw, 56px);

  --t-fast: 160ms cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-med:  280ms cubic-bezier(0.2, 0.7, 0.2, 1);
  --t-slow: 520ms cubic-bezier(0.2, 0.7, 0.2, 1);
}

[data-theme="light"] {
  --bg: #f4f3ef;
  --bg-2: #ecebe6;
  --surface: #ffffff;
  --elevated: #ffffff;
  --border: #dedcd6;
  --border-strong: #b8b6b0;
  --hairline: rgba(0, 0, 0, 0.10);
  --hairline-strong: rgba(0, 0, 0, 0.22);

  --text: #14141a;
  --text-muted: #5a5a62;
  --text-dim: #8d8d94;

  --silver-1: #4a4a52;
  --silver-2: #6e6e76;
  --silver-3: #9a9aa2;

  --accent: #2a2a30;
  --accent-soft: rgba(20, 20, 26, 0.06);

  --grain-opacity: 0.03;
  --vignette: radial-gradient(120% 80% at 50% -10%, rgba(0,0,0,0.04), transparent 60%);

  --shadow-1: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 8px 28px rgba(30, 30, 40, 0.08);
  --shadow-2: 0 1px 0 rgba(255, 255, 255, 0.7) inset, 0 24px 60px -20px rgba(30, 30, 40, 0.12);
}

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

html { scroll-behavior: smooth; }

html, body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  font-feature-settings: "ss01", "ss02", "cv11";
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  transition: background-color var(--t-med), color var(--t-med);
}

body {
  min-height: 100vh;
  background-image: var(--vignette);
  background-attachment: fixed;
  overflow-x: hidden;
}

/* Subtle film-grain on body for atmosphere */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 100;
  opacity: var(--grain-opacity);
  mix-blend-mode: overlay;
  background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='160' height='160'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.6 0'/></filter><rect width='160' height='160' filter='url(%23n)'/></svg>");
}

a { color: inherit; text-decoration: none; }
button { font: inherit; color: inherit; background: none; border: 0; cursor: pointer; }
img, svg { display: block; max-width: 100%; }
ul, ol { margin: 0; padding: 0; list-style: none; }
::selection { background: var(--silver-2); color: var(--bg); }

/* ────────────────── Skip link ────────────────── */
.skip {
  position: absolute;
  left: -9999px;
  top: 0;
  padding: 12px 16px;
  background: var(--text);
  color: var(--bg);
  z-index: 200;
  font-family: var(--font-mono);
  font-size: 12px;
}
.skip:focus { left: 12px; top: 12px; }

/* ────────────────── Scroll progress ────────────────── */
.progress {
  position: fixed;
  top: 0; left: 0; right: 0;
  height: 1px;
  z-index: 90;
  background: var(--hairline);
}
.progress > span {
  display: block;
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--silver-1), var(--silver-2), var(--silver-3));
  transition: width 80ms linear;
}

/* ────────────────── Header ────────────────── */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: clamp(16px, 4vw, 48px);
  padding: 18px var(--pad-x);
  background: color-mix(in oklab, var(--bg) 88%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid var(--hairline);
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.brand-mark { width: 36px; height: 27px; }
.brand-word {
  display: inline-flex;
  flex-direction: column;
  line-height: 1;
  letter-spacing: 0.01em;
}
.brand-word-1 {
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 17px;
  font-style: italic;
  letter-spacing: -0.005em;
}
.brand-word-2 {
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  margin-top: 4px;
}

.site-nav {
  display: flex;
  justify-content: center;
  gap: clamp(14px, 2.4vw, 36px);
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.14em;
  color: var(--text-muted);
}
.site-nav a {
  position: relative;
  display: inline-flex;
  align-items: baseline;
  gap: 8px;
  padding: 6px 0;
  transition: color var(--t-fast);
}
.site-nav a::after {
  content: "";
  position: absolute;
  left: 0; right: 100%;
  bottom: 0;
  height: 1px;
  background: var(--accent);
  transition: right var(--t-med);
}
.site-nav a:hover { color: var(--text); }
.site-nav a:hover::after { right: 0; }
.nav-num {
  font-size: 10px;
  color: var(--text-dim);
  letter-spacing: 0.1em;
}

@media (max-width: 820px) {
  .site-nav { display: none; }
  .site-header { grid-template-columns: 1fr auto; }
}

.theme-toggle {
  display: inline-grid;
  place-items: center;
  width: 38px; height: 38px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
  transition: color var(--t-fast), border-color var(--t-fast), background var(--t-fast), transform var(--t-fast);
}
.theme-toggle:hover { color: var(--text); border-color: var(--border-strong); }
.theme-toggle:active { transform: scale(0.95); }
.theme-toggle svg { width: 16px; height: 16px; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
[data-theme="light"] .theme-toggle .icon-sun { display: block; }
[data-theme="light"] .theme-toggle .icon-moon { display: none; }

/* ────────────────── Shared section frame ────────────────── */
.section {
  position: relative;
  max-width: var(--col-max);
  margin: 0 auto;
  padding: clamp(80px, 12vw, 160px) var(--pad-x);
  border-top: 1px solid var(--hairline);
}
.section:first-of-type { border-top: 0; }

.section-head {
  display: grid;
  gap: 18px;
  max-width: 880px;
  margin-bottom: clamp(36px, 6vw, 64px);
}
.section-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 12px;
}
.section-tag::before {
  content: "";
  display: inline-block;
  width: 36px; height: 1px;
  background: var(--hairline-strong);
}
.section-title {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(32px, 4.6vw, 56px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0;
}
.section-title em {
  font-style: italic;
  font-variation-settings: "opsz" 144;
  background: linear-gradient(135deg, var(--silver-1), var(--silver-2) 60%, var(--silver-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.section-lede {
  font-size: clamp(15px, 1.6vw, 18px);
  line-height: 1.6;
  color: var(--text-muted);
  max-width: 64ch;
  margin: 0;
}

/* ────────────────── HERO ────────────────── */
.hero {
  position: relative;
  max-width: var(--col-max);
  margin: 0 auto;
  padding: clamp(60px, 10vw, 120px) var(--pad-x) clamp(80px, 10vw, 140px);
  min-height: calc(100vh - 80px);
  display: flex;
  align-items: center;
}
.hero-grid {
  width: 100%;
  display: grid;
  grid-template-columns: 240px 1fr 80px;
  gap: clamp(24px, 4vw, 64px);
  align-items: start;
}

.hero-meta {
  position: sticky;
  top: 100px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
}
.meta-line { display: inline-flex; align-items: center; gap: 10px; margin-bottom: 20px; }
.meta-line .dot {
  width: 6px; height: 6px; border-radius: 999px;
  background: var(--silver-2);
  box-shadow: 0 0 0 3px var(--accent-soft);
  animation: pulse 2.4s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 0.6; transform: scale(1); }
  50% { opacity: 1; transform: scale(1.15); }
}
.meta-list {
  display: grid;
  gap: 10px;
  border-top: 1px solid var(--hairline);
  padding-top: 16px;
}
.meta-list li {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  font-variant-numeric: tabular-nums;
}
.meta-list li > span:first-child { color: var(--text-dim); }
.meta-list li > span:last-child { color: var(--text); }

.hero-main { min-width: 0; }

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 14px;
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  margin-bottom: 36px;
}
.hero-eyebrow .rule {
  display: inline-block;
  width: 56px; height: 1px;
  background: linear-gradient(90deg, transparent, var(--hairline-strong));
}

.hero-logo {
  margin: 8px 0 36px;
  width: clamp(180px, 28vw, 280px);
  filter: drop-shadow(0 16px 24px rgba(0,0,0,0.5));
}
[data-theme="light"] .hero-logo {
  filter: drop-shadow(0 12px 18px rgba(0,0,0,0.18));
}
.hero-logo-svg { width: 100%; height: auto; }

.hero-headline {
  font-family: var(--font-display);
  font-weight: 350;
  font-variation-settings: "opsz" 144;
  font-size: clamp(40px, 7vw, 96px);
  line-height: 0.98;
  letter-spacing: -0.025em;
  margin: 0 0 28px;
  max-width: 16ch;
}
.hero-headline em {
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(135deg, #fafafd 0%, var(--silver-2) 55%, var(--silver-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  padding-right: 0.05em;
}
[data-theme="light"] .hero-headline em {
  background: linear-gradient(135deg, #3a3a40 0%, #6a6a72 50%, #2a2a30 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  font-size: clamp(15px, 1.5vw, 18px);
  line-height: 1.62;
  color: var(--text-muted);
  max-width: 58ch;
  margin: 0 0 36px;
}
.hero-sub strong { color: var(--text); font-weight: 500; }

.hero-cta {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 18px 24px;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  padding: 14px 22px;
  background: linear-gradient(180deg, var(--silver-1), var(--silver-2));
  color: #0a0a0b;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.005em;
  border-radius: 999px;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: var(--shadow-2);
  transition: transform var(--t-fast), box-shadow var(--t-med), filter var(--t-fast);
}
.btn:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn:active { transform: translateY(0); }
.btn svg { width: 16px; height: 16px; transition: transform var(--t-fast); }
.btn:hover svg { transform: translateX(3px); }
[data-theme="light"] .btn {
  background: linear-gradient(180deg, #1f1f24, #0d0d10);
  color: #f4f4f6;
  border-color: rgba(0,0,0,0.2);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  padding: 8px 4px;
  border-bottom: 1px solid transparent;
  transition: color var(--t-fast), border-color var(--t-fast);
}
.btn-ghost:hover { color: var(--text); border-bottom-color: var(--hairline-strong); }

.hero-scroll {
  position: sticky;
  top: 50vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.24em;
  color: var(--text-dim);
  writing-mode: vertical-rl;
  transform: rotate(180deg);
}
.scroll-rule {
  display: inline-block;
  width: 1px;
  height: 48px;
  background: linear-gradient(180deg, transparent, var(--silver-2));
  animation: drop 2.2s ease-in-out infinite;
}
@keyframes drop {
  0% { transform: translateY(-12px); opacity: 0.2; }
  60% { opacity: 1; }
  100% { transform: translateY(12px); opacity: 0; }
}

@media (max-width: 980px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero-meta { position: static; }
  .hero-scroll { display: none; }
}

/* ────────────────── PRINCIPLES ────────────────── */
.principles {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: clamp(20px, 2.4vw, 36px);
  counter-reset: principle;
}
.principles li {
  position: relative;
  padding: 28px 26px 32px;
  background: linear-gradient(180deg, var(--surface), var(--bg-2));
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-1);
  transition: transform var(--t-med), border-color var(--t-med), box-shadow var(--t-med);
}
.principles li:hover { transform: translateY(-3px); border-color: var(--border-strong); box-shadow: var(--shadow-2); }
.principles .p-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
  margin-bottom: 28px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.principles .p-num::after {
  content: "";
  flex: 1;
  height: 1px;
  background: var(--hairline);
}
.principles h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 2.2vw, 28px);
  line-height: 1.15;
  letter-spacing: -0.015em;
  margin: 0 0 14px;
}
.principles p {
  color: var(--text-muted);
  font-size: 15px;
  line-height: 1.6;
  margin: 0;
}

@media (max-width: 880px) {
  .principles { grid-template-columns: 1fr; }
}

/* ────────────────── CAPABILITIES ────────────────── */
.caps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  border-top: 1px solid var(--hairline);
  border-left: 1px solid var(--hairline);
}
.caps article {
  padding: 32px 28px;
  border-right: 1px solid var(--hairline);
  border-bottom: 1px solid var(--hairline);
  transition: background var(--t-med);
}
.caps article:hover { background: var(--accent-soft); }
.caps header { display: flex; align-items: baseline; gap: 14px; margin-bottom: 14px; }
.caps .cap-num {
  font-family: var(--font-mono);
  font-size: 11px;
  letter-spacing: 0.2em;
  color: var(--silver-2);
}
.caps h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: 22px;
  letter-spacing: -0.01em;
  margin: 0;
}
.caps p {
  font-size: 14.5px;
  line-height: 1.6;
  color: var(--text-muted);
  margin: 0 0 18px;
}
.cap-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.12em;
}
.cap-tags li {
  padding: 4px 9px;
  border: 1px solid var(--border);
  border-radius: 999px;
  color: var(--text-muted);
}

@media (max-width: 980px) { .caps { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 640px) { .caps { grid-template-columns: 1fr; } }

/* ────────────────── METHOD ────────────────── */
.method {
  display: grid;
  gap: 0;
  counter-reset: method;
  border-top: 1px solid var(--hairline);
}
.method li {
  display: grid;
  grid-template-columns: 120px 1fr;
  gap: clamp(24px, 4vw, 64px);
  padding: 28px 0;
  border-bottom: 1px solid var(--hairline);
  align-items: baseline;
  transition: padding var(--t-med);
}
.method li:hover { padding-left: 12px; }
.method .m-num {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.method h3 {
  font-family: var(--font-display);
  font-weight: 400;
  font-size: clamp(22px, 2.6vw, 32px);
  letter-spacing: -0.015em;
  margin: 0 0 10px;
}
.method p {
  color: var(--text-muted);
  font-size: 15.5px;
  line-height: 1.6;
  margin: 0;
  max-width: 68ch;
}

@media (max-width: 640px) {
  .method li { grid-template-columns: 1fr; gap: 8px; padding: 22px 0; }
  .method li:hover { padding-left: 0; }
}

/* ────────────────── ABOUT ────────────────── */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: clamp(32px, 6vw, 80px);
  align-items: start;
}
.about-quote {
  position: relative;
  padding: 36px 32px;
  background: linear-gradient(160deg, var(--surface) 0%, var(--bg-2) 80%);
  border: 1px solid var(--border);
  border-radius: 20px;
  box-shadow: var(--shadow-1);
}
.about-quote blockquote {
  margin: 0;
  font-family: var(--font-display);
  font-style: italic;
  font-weight: 350;
  font-size: clamp(22px, 2.6vw, 30px);
  line-height: 1.25;
  letter-spacing: -0.01em;
  color: var(--text);
}
.about-quote cite {
  display: block;
  margin-top: 20px;
  font-style: normal;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
}
.about-body p {
  font-size: 16px;
  line-height: 1.7;
  color: var(--text-muted);
  margin: 16px 0 0;
}
.about-body .section-tag { margin-bottom: 18px; }

@media (max-width: 880px) { .about-grid { grid-template-columns: 1fr; } }

/* ────────────────── CONTACT ────────────────── */
.contact-title {
  max-width: 22ch;
}
.contact-title em {
  font-style: italic;
}
.contact-card {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
  padding: 36px;
  border: 1px solid var(--border);
  border-radius: 22px;
  background:
    linear-gradient(160deg, var(--surface) 0%, var(--bg-2) 80%),
    radial-gradient(80% 100% at 0% 0%, var(--accent-soft), transparent 60%);
  box-shadow: var(--shadow-2);
}
.contact-email {
  display: grid;
  grid-template-columns: auto 1fr auto;
  align-items: center;
  gap: 18px;
  padding: 18px 20px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: var(--bg-2);
  transition: border-color var(--t-fast), transform var(--t-fast), background var(--t-fast);
}
.contact-email:hover { border-color: var(--border-strong); transform: translateY(-1px); }
.contact-label {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.2em;
  color: var(--text-dim);
}
.contact-value {
  font-family: var(--font-display);
  font-size: clamp(18px, 2vw, 24px);
  letter-spacing: -0.01em;
  color: var(--text);
}
.contact-email svg { width: 18px; height: 18px; color: var(--text-muted); transition: transform var(--t-fast), color var(--t-fast); }
.contact-email:hover svg { transform: translate(2px, -2px); color: var(--text); }

.contact-meta {
  display: grid;
  gap: 14px;
  margin: 0;
  align-self: center;
}
.contact-meta > div {
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 12px;
  padding-bottom: 12px;
  border-bottom: 1px solid var(--hairline);
}
.contact-meta > div:last-child { border-bottom: 0; padding-bottom: 0; }
.contact-meta dt {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-dim);
}
.contact-meta dd {
  margin: 0;
  font-size: 14.5px;
  color: var(--text);
}

@media (max-width: 820px) {
  .contact-card { grid-template-columns: 1fr; padding: 24px; }
}

/* ────────────────── Footer ────────────────── */
.site-footer {
  border-top: 1px solid var(--hairline);
  padding: 32px var(--pad-x) 40px;
  margin-top: 40px;
}
.foot-grid {
  max-width: var(--col-max);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
}
.foot-brand { display: inline-flex; align-items: center; gap: 14px; }
.foot-mark { width: 30px; height: 22px; }
.foot-name {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 16px;
}
.foot-tagline {
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-muted);
  margin-top: 3px;
}
.foot-meta {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.16em;
  color: var(--text-muted);
  display: inline-flex;
  align-items: center;
  gap: 10px;
}
.foot-dot { color: var(--text-dim); }

/* ────────────────── Reveal animations ────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 700ms ease, transform 700ms cubic-bezier(0.2, 0.7, 0.2, 1);
}
.reveal.is-in { opacity: 1; transform: none; }

.hero-eyebrow, .hero-logo, .hero-headline, .hero-sub, .hero-cta, .hero-meta {
  animation: rise 900ms cubic-bezier(0.2, 0.7, 0.2, 1) both;
}
.hero-eyebrow { animation-delay: 80ms; }
.hero-logo    { animation-delay: 160ms; }
.hero-headline{ animation-delay: 240ms; }
.hero-sub     { animation-delay: 360ms; }
.hero-cta     { animation-delay: 460ms; }
.hero-meta    { animation-delay: 200ms; }

@keyframes rise {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
  }
  html { scroll-behavior: auto; }
}

/* ────────────────── 404 page ────────────────── */
.not-found {
  min-height: calc(100vh - 220px);
  max-width: var(--col-max);
  margin: 0 auto;
  padding: clamp(60px, 10vw, 120px) var(--pad-x);
  display: flex;
  align-items: center;
  justify-content: center;
  text-align: center;
}
.nf-wrap { max-width: 720px; }

.nf-tag {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.22em;
  color: var(--text-muted);
  margin-bottom: 28px;
  display: inline-flex;
  align-items: center;
  gap: 14px;
}
.nf-tag::before, .nf-tag::after {
  content: "";
  display: inline-block;
  width: 44px; height: 1px;
  background: var(--hairline-strong);
}

.nf-figure {
  font-family: var(--font-display);
  font-weight: 300;
  font-variation-settings: "opsz" 144;
  font-size: clamp(120px, 22vw, 240px);
  line-height: 0.9;
  letter-spacing: -0.045em;
  margin: 0 0 12px;
  background: linear-gradient(135deg, var(--silver-1) 0%, var(--silver-2) 55%, var(--silver-3) 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 12px 24px rgba(0, 0, 0, 0.35));
}
[data-theme="light"] .nf-figure {
  background: linear-gradient(135deg, #3a3a40 0%, #6a6a72 55%, #2a2a30 100%);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  filter: drop-shadow(0 8px 16px rgba(20, 20, 26, 0.12));
}

.nf-title {
  font-family: var(--font-display);
  font-weight: 350;
  font-variation-settings: "opsz" 144;
  font-size: clamp(28px, 4.4vw, 44px);
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin: 0 0 18px;
}
.nf-title em {
  font-style: italic;
  font-weight: 400;
  background: linear-gradient(135deg, var(--silver-1), var(--silver-3));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
[data-theme="light"] .nf-title em {
  background: linear-gradient(135deg, #3a3a40, #6a6a72);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.nf-sub {
  font-size: clamp(15px, 1.6vw, 17px);
  line-height: 1.62;
  color: var(--text-muted);
  max-width: 54ch;
  margin: 0 auto 36px;
}

.nf-actions {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
  gap: 18px 26px;
  margin-bottom: 56px;
}
.nf-actions .btn svg { transform: translateX(0); }
.nf-actions .btn:hover svg { transform: translateX(-3px); }

.nf-coords {
  display: inline-flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 12px;
  padding: 14px 20px;
  border: 1px solid var(--hairline);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--text-dim);
  font-variant-numeric: tabular-nums;
}
.nf-coords .dot { opacity: 0.5; }

/* ────────────────── Focus ring ────────────────── */
:focus-visible {
  outline: 2px solid var(--silver-1);
  outline-offset: 3px;
  border-radius: 6px;
}