/* Agent Elmer — design system
   Warm organic (Elmer) meets a precise deterministic lattice. */

:root {
  --bg: #0a0b0f;
  --bg2: #101219;
  --fg: #f3f1ea;
  --muted: #a4aab3;
  --faint: #6c7480;
  --line: rgba(243, 241, 234, 0.09);
  --line2: rgba(243, 241, 234, 0.20);
  --panel: rgba(255, 255, 255, 0.02);
  --panel2: rgba(255, 255, 255, 0.045);
  --warm: #e8a45c;
  --cool: #57d1c6;
  --violet: #8f83ff;
  --warm-glow: rgba(232, 164, 92, 0.16);
  --cool-glow: rgba(87, 209, 198, 0.14);
  --violet-glow: rgba(143, 131, 255, 0.14);

  --serif: ui-serif, "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif;
  --sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --mono: ui-monospace, SFMono-Regular, "JetBrains Mono", Menlo, Consolas, monospace;

  --gutter: clamp(1.25rem, 5vw, 6rem);
  --measure: 46rem;
}

:root[data-theme="light"] {
  --bg: #f6f4ef;
  --bg2: #ece9e1;
  --fg: #14161b;
  --muted: #565c66;
  --faint: #8a9099;
  --line: rgba(20, 22, 27, 0.10);
  --line2: rgba(20, 22, 27, 0.22);
  --panel: rgba(20, 22, 27, 0.02);
  --panel2: rgba(20, 22, 27, 0.045);
  --warm: #c9772a;
  --cool: #0f9a90;
  --violet: #6b5cf0;
  --warm-glow: rgba(201, 119, 42, 0.12);
  --cool-glow: rgba(15, 154, 144, 0.10);
  --violet-glow: rgba(107, 92, 240, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  margin: 0;
  background:
    radial-gradient(1200px 820px at 82% -12%, var(--cool-glow), transparent 60%),
    radial-gradient(1000px 720px at 6% 108%, var(--warm-glow), transparent 55%),
    radial-gradient(900px 600px at 50% 40%, var(--violet-glow), transparent 70%),
    var(--bg);
  color: var(--fg);
  font-family: var(--sans);
  font-size: clamp(1rem, 0.5vw + 0.92rem, 1.14rem);
  line-height: 1.72;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

/* faint lattice + grain */
body::before {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 0;
  background-image:
    linear-gradient(var(--line) 1px, transparent 1px),
    linear-gradient(90deg, var(--line) 1px, transparent 1px);
  background-size: 84px 84px;
  mask-image: radial-gradient(130% 90% at 50% 0%, #000 32%, transparent 80%);
  opacity: 0.5;
}
body::after {
  content: "";
  position: fixed; inset: 0; pointer-events: none; z-index: 3;
  opacity: 0.03;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)'/%3E%3C/svg%3E");
}

/* skip link */
.skip { position: absolute; left: -9999px; z-index: 100; }
.skip:focus { left: 1rem; top: 1rem; background: var(--fg); color: var(--bg); padding: 0.5rem 0.9rem; border-radius: 8px; text-decoration: none; }

/* authority spine */
.spine { position: fixed; top: 0; left: 0; width: 2px; height: 100vh; background: var(--line); z-index: 5; }
.spine__fill { display: block; width: 100%; height: var(--progress, 0%); background: linear-gradient(var(--warm), var(--violet), var(--cool)); }

/* section rail */
.rail {
  position: fixed; top: 50%; right: 1.6rem; transform: translateY(-50%);
  display: flex; flex-direction: column; align-items: flex-end; gap: 0.6rem; z-index: 8;
}
.rail a {
  font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.14em; text-transform: uppercase;
  color: var(--muted); text-decoration: none; text-align: right; opacity: 0; white-space: nowrap;
  transition: opacity 0.3s ease, color 0.3s ease;
}
.rail a::after { content: ""; display: inline-block; width: 14px; height: 1px; background: currentColor; margin-left: 0.5rem; vertical-align: middle; opacity: 0.6; }
.rail:hover a { opacity: 0.7; }
.rail a.active { opacity: 1; color: var(--warm); }

/* topbar */
.topbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 10;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0.95rem var(--gutter) 0.95rem calc(var(--gutter) + 2px);
  backdrop-filter: saturate(140%) blur(14px);
  background: linear-gradient(color-mix(in srgb, var(--bg) 88%, transparent), color-mix(in srgb, var(--bg) 55%, transparent));
  border-bottom: 1px solid var(--line);
}
.mark {
  display: flex; align-items: center; gap: 0.55rem; margin-right: 1.4rem;
  font-family: var(--mono); letter-spacing: 0.16em; text-transform: uppercase; font-size: 0.8rem;
  color: var(--fg); text-decoration: none; white-space: nowrap;
}
.mark__elmer { width: 1.6rem; height: 1.6rem; color: var(--warm); display: block; }
.topnav { display: flex; gap: 1.2rem; align-items: center; }
.topnav a { color: var(--muted); text-decoration: none; font-size: 0.84rem; white-space: nowrap; transition: color 0.25s ease; }
.topnav a:hover { color: var(--fg); }
.topnav a.active { color: var(--fg); }
.topnav .cta {
  color: var(--bg); background: var(--fg); padding: 0.42rem 0.95rem; border-radius: 999px; font-weight: 600;
  transition: background 0.25s ease, transform 0.25s ease;
}
.topnav .cta:hover { background: var(--warm); color: var(--bg); transform: translateY(-1px); }

/* theme toggle */
.themer {
  display: inline-grid; place-items: center; width: 2rem; height: 2rem; margin-left: 0.4rem;
  border: 1px solid var(--line2); border-radius: 999px; background: transparent; color: var(--muted);
  cursor: pointer; font-size: 0.9rem; line-height: 1; transition: color 0.2s ease, border-color 0.2s ease;
}
.themer:hover { color: var(--fg); border-color: var(--fg); }

/* beats */
main { position: relative; z-index: 1; }
.beat { position: relative; padding: clamp(5rem, 12vh, 9rem) var(--gutter) clamp(5rem, 12vh, 9rem) calc(var(--gutter) + 2px); }
.beat + .beat { border-top: 1px solid var(--line); }
.beat__inner { max-width: 74rem; margin: 0 auto; }
.beat__body { max-width: var(--measure); margin-top: 1.6rem; }
.beat__body > p { margin: 0 0 1.15rem; }
.beat__body > h3 { font-family: var(--serif); font-weight: 400; font-size: 1.5rem; margin: 2.4rem 0 0.8rem; }

.eyebrow { font-family: var(--mono); font-size: 0.74rem; letter-spacing: 0.22em; text-transform: uppercase; color: var(--cool); margin: 0 0 1.4rem; display: flex; align-items: center; gap: 0.6rem; }
.eyebrow::before { content: ""; width: 1.6rem; height: 1px; background: currentColor; opacity: 0.6; }
.beat__title { font-family: var(--serif); font-weight: 400; line-height: 1.08; letter-spacing: -0.015em; margin: 0; font-size: clamp(2rem, 4.4vw, 3.6rem); }
.beat__sub { font-size: clamp(1.15rem, 1.6vw, 1.6rem); color: var(--muted); margin: 1rem 0 0; max-width: var(--measure); font-weight: 350; }

/* hero */
.beat--hero { min-height: 100vh; display: flex; align-items: center; overflow: hidden; }
.beat--hero::after {
  content: ""; position: absolute; inset: 0; z-index: -1; pointer-events: none;
  background: radial-gradient(600px 400px at 78% 30%, var(--warm-glow), transparent 65%);
}
.beat--hero::before {
  content: ""; position: absolute; right: 3%; top: 50%; transform: translateY(-50%);
  width: min(40vw, 540px); height: min(40vw, 540px); z-index: -1; pointer-events: none;
  background: url(hero-elmer.svg) no-repeat center / contain;
  opacity: 0.97;
}
@media (max-width: 980px) {
  .beat--hero::before { opacity: 0.16; right: -6%; width: 70vw; height: 70vw; }
}
.beat--hero .beat__title {
  font-size: clamp(2.9rem, 8.4vw, 6.6rem);
  background: linear-gradient(98deg, var(--fg) 22%, var(--warm) 64%, var(--cool) 92%);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.beat--hero .beat__sub { font-size: clamp(1.3rem, 2.4vw, 2rem); color: var(--fg); }
.beat--hero .beat__body { max-width: 42rem; font-size: 1.12rem; }

/* principle / pull text */
.beat--principle { background: linear-gradient(var(--bg), var(--bg2)); }
.beat--principle .beat__title { font-size: clamp(1.9rem, 3.8vw, 3.1rem); max-width: 28ch; }
.beat--principle .beat__title em { color: var(--warm); font-style: italic; }

/* grids + cards */
.grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(272px, 1fr)); gap: 1.25rem; margin-top: 2.5rem; }
.card {
  position: relative; border: 1px solid var(--line); border-radius: 18px; padding: 1.9rem;
  background: linear-gradient(180deg, var(--panel), transparent);
  transition: transform 0.35s ease, border-color 0.35s ease, background 0.35s ease;
}
.card:hover { transform: translateY(-4px); border-color: var(--line2); background: linear-gradient(180deg, var(--panel2), transparent); }
.card h3 { font-family: var(--serif); font-weight: 400; font-size: 1.5rem; margin: 0 0 0.2rem; }
.card p { color: var(--muted); margin: 0.75rem 0 0; }
.card ul { color: var(--muted); padding-left: 1.1rem; margin: 1rem 0 0; }
.card li { margin: 0.32rem 0; }
.tag { font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--warm); }

/* icons (line, in warm) */
.icon { width: 2rem; height: 2rem; color: var(--warm); margin-bottom: 0.9rem; display: block; }
.icon svg { width: 100%; height: 100%; stroke: currentColor; fill: none; stroke-width: 1.6; stroke-linecap: round; stroke-linejoin: round; }

/* flow (stage machine) */
.flow { display: flex; flex-wrap: wrap; align-items: center; gap: 0.6rem; margin-top: 2.2rem; }
.flow__node { border: 1px solid var(--line2); border-radius: 999px; padding: 0.5rem 0.9rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--fg); }
.flow__arrow { color: var(--cool); }

/* steps */
.steps { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1.6rem; margin-top: 2.5rem; }
.step { border-top: 2px solid var(--line2); padding-top: 1.2rem; }
.step__n { font-family: var(--serif); font-size: 2.3rem; color: var(--warm); display: block; line-height: 1; }
.step h3 { font-family: var(--serif); font-weight: 400; font-size: 1.35rem; margin: 0.55rem 0 0.5rem; }
.step p { color: var(--muted); margin: 0; }

/* compare (old way vs new way) */
.compare { display: grid; grid-template-columns: 1fr 1fr; gap: 1.25rem; margin-top: 2.5rem; }
.compare__col { border: 1px solid var(--line); border-radius: 18px; padding: 1.9rem; }
.compare__col--new { border-color: color-mix(in srgb, var(--warm) 55%, var(--line)); background: linear-gradient(180deg, var(--warm-glow), transparent); }
.compare__col h3 { font-family: var(--serif); font-weight: 400; font-size: 1.5rem; margin: 0 0 0.6rem; }
.compare__col ul { margin: 0; padding-left: 1.1rem; color: var(--muted); }
.compare__col li { margin: 0.4rem 0; }

/* pricing */
.pricing { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1.25rem; margin-top: 2.5rem; }
.tier { border: 1px solid var(--line); border-radius: 18px; padding: 1.9rem 1.7rem; display: flex; flex-direction: column; }
.tier--featured { border-color: var(--warm); background: linear-gradient(180deg, var(--warm-glow), transparent); }
.tier h3 { font-family: var(--serif); font-weight: 400; font-size: 1.5rem; margin: 0; }
.tier .price { font-family: var(--serif); font-size: 1.9rem; color: var(--warm); margin: 0.4rem 0 0.6rem; }
.tier p { color: var(--muted); margin: 0 0 1rem; font-size: 0.95rem; }
.tier ul { color: var(--muted); padding-left: 1.1rem; margin: 0; }
.tier li { margin: 0.35rem 0; }

/* faq */
.faq { max-width: var(--measure); margin-top: 1.5rem; }
.faq details { border-bottom: 1px solid var(--line); padding: 1.05rem 0; }
.faq details:first-child { border-top: 1px solid var(--line); }
.faq summary { cursor: pointer; font-weight: 600; list-style: none; display: flex; gap: 0.7rem; align-items: baseline; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::before { content: "+"; color: var(--cool); font-family: var(--mono); }
.faq details[open] summary::before { content: "\2013"; }
.faq p { color: var(--muted); margin: 0.7rem 0 0 1.5rem; }

/* quote + stats */
.quote { font-family: var(--serif); font-size: clamp(1.5rem, 3.2vw, 2.6rem); line-height: 1.25; max-width: 24ch; margin: 0; }
.quote em { color: var(--warm); font-style: italic; }
.stats { display: flex; flex-wrap: wrap; gap: 2.5rem; margin-top: 2.5rem; }
.stat__n { font-family: var(--serif); font-size: clamp(2rem, 4vw, 3rem); color: var(--fg); line-height: 1; }
.stat__l { font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); margin-top: 0.5rem; }
.values { display: flex; flex-wrap: wrap; gap: 1.5rem; justify-content: center; margin-top: 2rem; font-family: var(--mono); font-size: 0.72rem; letter-spacing: 0.16em; text-transform: uppercase; color: var(--muted); }
.values span { display: inline-flex; align-items: center; gap: 0.5rem; }
.values span::before { content: ""; width: 6px; height: 6px; border-radius: 50%; background: var(--warm); }

/* buttons */
.button { display: inline-block; margin: 0.4rem 0.6rem 0 0; padding: 0.85rem 1.6rem; border-radius: 999px; background: var(--fg); color: var(--bg); font-weight: 600; text-decoration: none; transition: background 0.25s ease, transform 0.25s ease; }
.button:hover { background: var(--warm); transform: translateY(-2px); }
.button--ghost { background: transparent; color: var(--fg); border: 1px solid var(--line2); }
.button--ghost:hover { background: var(--panel2); color: var(--fg); }

/* diagrams */
.diagram { max-width: 100%; margin: 2.5rem 0 0; }
.diagram svg { width: 100%; height: auto; display: block; overflow: visible; }
figure { margin: 0; }
figcaption { margin-top: 0.9rem; font-size: 0.85rem; font-family: var(--mono); color: var(--faint); }
.muted { color: var(--muted); }
.elmer-figure { max-width: 380px; }
.elmer-figure img { width: 100%; height: auto; display: block; }

/* markdown */
blockquote { margin: 2rem 0; padding-left: 1.4rem; border-left: 2px solid var(--warm); font-family: var(--serif); font-size: clamp(1.2rem, 2vw, 1.7rem); color: var(--fg); line-height: 1.45; }
code { font-family: var(--mono); font-size: 0.9em; color: var(--cool); background: color-mix(in srgb, var(--cool) 10%, transparent); padding: 0.1em 0.36em; border-radius: 6px; }
pre { background: var(--panel2); border: 1px solid var(--line); border-radius: 12px; padding: 1rem 1.2rem; overflow-x: auto; }
pre code { background: none; color: var(--fg); }
a { color: var(--cool); }

/* cta */
.beat--cta { text-align: center; background: linear-gradient(var(--bg2), var(--bg)); }
.beat--cta .beat__inner { max-width: 48rem; }
.beat--cta .beat__title { font-size: clamp(2rem, 4vw, 3.2rem); }
.beat--cta .beat__body { margin: 1.5rem auto 0; }
.beat--cta .eyebrow { justify-content: center; }

/* footer */
.footer { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding: 2.5rem calc(var(--gutter) + 2px) 3.5rem var(--gutter); border-top: 1px solid var(--line); font-size: 0.84rem; color: var(--faint); position: relative; z-index: 1; }
.footer a { color: var(--muted); }

/* reveal */
.beat__inner { opacity: 0; transform: translateY(20px); transition: opacity 0.8s ease, transform 0.8s ease; }
.beat.in .beat__inner { opacity: 1; transform: none; }

/* diagram auto-draw + float */
.diagram svg .drawable { stroke-dasharray: var(--len, 1000); stroke-dashoffset: var(--len, 1000); }
.beat.in .diagram svg .drawable { animation: draw 1.6s ease forwards; }
@keyframes draw { to { stroke-dashoffset: 0; } }
.float { animation: floaty 7s ease-in-out infinite; }
@keyframes floaty { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-8px); } }

@media (max-width: 1100px) { .rail { display: none; } }
@media (max-width: 760px) {
  .topnav a:not(.cta) { display: none; }
  body::before { background-size: 52px 52px; }
  .compare { grid-template-columns: 1fr; }
}
@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .beat__inner { opacity: 1; transform: none; transition: none; }
  .float, .diagram svg .drawable { animation: none; }
}

/* focus */
a:focus-visible, button:focus-visible, summary:focus-visible { outline: 2px solid var(--cool); outline-offset: 3px; border-radius: 4px; }