/* Layout: a single readable column with wide bands; the "aerial root" rule marks each section. */
:root {
  --paper: #f2f4ef;
  --paper-2: #e6eae2;
  --ink: #142520;
  --ink-soft: #4a5a53;
  --line: #c9d1c7;
  --copper: #a3501d;
  --copper-soft: #f3dfcf;
  --leaf: #2f5d4c;
  --card: #ffffff;
  --bubble-out: #dcefe3;
  --display: "Bricolage Grotesque", "Segoe UI", system-ui, sans-serif;
  --body: "IBM Plex Sans", "Segoe UI", system-ui, sans-serif;
  --mono: "IBM Plex Mono", ui-monospace, "SF Mono", Menlo, monospace;
  --wrap: 68rem;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root:not([data-theme="light"]) {
    --paper: #101a17; --paper-2: #16231f; --ink: #e7ece6; --ink-soft: #a7b4ad;
    --line: #2a3a34; --copper: #e3925a; --copper-soft: #3a2518; --leaf: #8cc2ab;
    --card: #17241f; --bubble-out: #1f3a2f; color-scheme: dark;
  }
}
:root[data-theme="dark"] {
  --paper: #101a17; --paper-2: #16231f; --ink: #e7ece6; --ink-soft: #a7b4ad;
  --line: #2a3a34; --copper: #e3925a; --copper-soft: #3a2518; --leaf: #8cc2ab;
  --card: #17241f; --bubble-out: #1f3a2f; color-scheme: dark;
}

* { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 1.0625rem/1.65 var(--body);
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration-color: var(--copper); text-underline-offset: 3px; }
a:hover { color: var(--copper); }
:focus-visible { outline: 2px solid var(--copper); outline-offset: 3px; border-radius: 2px; }

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-left: max(20px, env(safe-area-inset-left, 0px));
  padding-right: max(20px, env(safe-area-inset-right, 0px));
}

h1, h2, h3 { font-family: var(--display); line-height: 1.08; letter-spacing: -0.02em; text-wrap: balance; margin: 0; }
h1 { font-size: clamp(2.4rem, 6vw, 4.4rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.4vw, 2.5rem); font-weight: 650; }
h3 { font-size: 1.2rem; font-weight: 650; letter-spacing: -0.01em; }
p { margin: 0; max-width: 62ch; }
.lede { font-size: clamp(1.15rem, 2vw, 1.35rem); color: var(--ink-soft); max-width: 46ch; }
.eyebrow {
  font: 500 0.78rem/1 var(--mono);
  letter-spacing: 0.12em; text-transform: uppercase; color: var(--copper);
}
.muted { color: var(--ink-soft); }
.mono { font-family: var(--mono); font-variant-numeric: tabular-nums; }

/* Header */
.site-head { border-bottom: 1px solid var(--line); }
.site-head .wrap { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding-block: 1.1rem; flex-wrap: wrap; }
.brand { display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none; font: 700 1.15rem/1 var(--display); letter-spacing: -0.01em; }
.brand svg { width: 30px; height: 30px; color: var(--leaf); }
.nav { display: flex; gap: 1.4rem; font-size: 0.95rem; flex-wrap: wrap; }
.nav a { text-decoration: none; color: var(--ink-soft); }
.nav a:hover, .nav a[aria-current="page"] { color: var(--ink); }

/* Buttons */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 1.25rem; border-radius: 6px; text-decoration: none;
  font: 600 1rem/1 var(--body); border: 1px solid transparent;
}
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--copper); color: #fff; }
.btn-ghost { border-color: var(--line); color: var(--ink); }
.btn-ghost:hover { border-color: var(--copper); }
.actions { display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* Sections */
section { padding-block: clamp(3.5rem, 8vw, 6rem); }
.band { background: var(--paper-2); }
.section-head { display: grid; gap: 0.9rem; margin-bottom: 2.5rem; }
.roots { display: block; width: 120px; height: 22px; color: var(--copper); }

/* Hero */
.hero .wrap { display: grid; gap: 1.6rem; padding-block: clamp(3.5rem, 9vw, 7rem) clamp(2.5rem, 6vw, 4rem); }
.hero h1 em { font-style: normal; color: var(--copper); }

/* Method */
.steps { list-style: none; margin: 0; padding: 0; display: grid; grid-template-columns: repeat(auto-fit, minmax(14rem, 1fr)); gap: 2rem 2.5rem; }
.steps li { display: grid; gap: 0.6rem; align-content: start; border-top: 2px solid var(--ink); padding-top: 1rem; min-width: 0; }
.steps .n { font: 500 0.85rem/1 var(--mono); color: var(--copper); }

/* Idea log */
.ideas { display: grid; gap: 0; border-top: 1px solid var(--line); }
.idea {
  display: grid; grid-template-columns: 7rem 1fr auto; gap: 1.5rem; align-items: center;
  padding-block: 1.4rem; border-bottom: 1px solid var(--line); text-decoration: none;
}
.idea > * { min-width: 0; }
a.idea:hover h3 { color: var(--copper); }
.idea .tag { font: 500 0.8rem/1.3 var(--mono); color: var(--ink-soft); }
.idea .body { display: grid; gap: 0.3rem; }
.pill {
  font: 500 0.75rem/1 var(--mono); letter-spacing: 0.06em; text-transform: uppercase;
  padding: 0.45rem 0.65rem; border-radius: 999px; white-space: nowrap;
}
.pill-live { background: var(--copper-soft); color: var(--copper); }
.pill-later { border: 1px dashed var(--line); color: var(--ink-soft); }
@media (max-width: 640px) {
  .idea { grid-template-columns: 1fr; gap: 0.6rem; }
}

/* Founder */
.founder { display: grid; grid-template-columns: 9rem 1fr; gap: 2rem; align-items: start; }
.founder > * { min-width: 0; }
.avatar {
  width: 9rem; height: 9rem; border-radius: 50%; object-fit: cover;
  background: var(--leaf); color: var(--paper);
  display: grid; place-items: center; font: 700 2.4rem/1 var(--display);
}
.founder .meta { display: flex; gap: 1.25rem; flex-wrap: wrap; font-size: 0.95rem; color: var(--ink-soft); margin-top: 0.4rem; }
@media (max-width: 560px) { .founder { grid-template-columns: 1fr; } .avatar { width: 6.5rem; height: 6.5rem; font-size: 1.8rem; } }

/* Placeholder marker (remove once real data is in) */
.todo { background: var(--copper-soft); color: var(--copper); padding: 0 0.3em; border-radius: 3px; font-weight: 600; }

/* Contact */
.contact { display: grid; gap: 1.2rem; }
.contact .email { font: 600 clamp(1.3rem, 3.5vw, 2rem)/1.2 var(--display); word-break: break-all; }

/* Footer */
.site-foot { border-top: 1px solid var(--line); font-size: 0.9rem; color: var(--ink-soft); }
.site-foot .wrap { display: flex; justify-content: space-between; gap: 1rem; flex-wrap: wrap; padding-block: 2rem; }

/* ---------- Idea page ---------- */
.split { display: grid; grid-template-columns: 1.05fr 1fr; gap: clamp(2rem, 5vw, 4rem); align-items: center; }
.split > * { min-width: 0; }
@media (max-width: 860px) { .split { grid-template-columns: 1fr; } }

.facts { display: grid; grid-template-columns: repeat(auto-fit, minmax(13rem, 1fr)); gap: 2rem; }
.fact { display: grid; gap: 0.5rem; align-content: start; }
.fact .big { font: 700 clamp(2.4rem, 5vw, 3.4rem)/1 var(--display); color: var(--copper); letter-spacing: -0.03em; font-variant-numeric: tabular-nums; }
.fact .src { font-size: 0.85rem; color: var(--ink-soft); }

/* Mock-up: invoice + reminder thread */
.mock { background: var(--card); border: 1px solid var(--line); border-radius: 14px; box-shadow: 0 18px 40px -24px rgba(20, 37, 32, 0.35); overflow: hidden; }
.mock-top { display: flex; justify-content: space-between; align-items: center; gap: 0.75rem; padding: 0.85rem 1.1rem; border-bottom: 1px solid var(--line); font-size: 0.85rem; flex-wrap: wrap; }
.mock-top strong { font-family: var(--display); font-size: 0.98rem; }
.inv { display: grid; grid-template-columns: repeat(3, 1fr); gap: 0.25rem 1rem; padding: 0.9rem 1.1rem; border-bottom: 1px solid var(--line); background: var(--paper); }
.inv dt { font: 500 0.7rem/1.4 var(--mono); text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-soft); }
.inv dd { margin: 0; font: 600 0.95rem/1.4 var(--mono); font-variant-numeric: tabular-nums; }
.inv .over { color: var(--copper); }
.thread { display: grid; gap: 0.85rem; padding: 1.1rem; }
.when { font: 500 0.72rem/1 var(--mono); color: var(--ink-soft); letter-spacing: 0.06em; text-transform: uppercase; justify-self: center; }
.msg { max-width: 88%; padding: 0.7rem 0.9rem; border-radius: 12px; font-size: 0.92rem; line-height: 1.5; }
.msg.out { justify-self: end; background: var(--bubble-out); border-bottom-right-radius: 4px; }
.msg.in { justify-self: start; background: var(--paper-2); border-bottom-left-radius: 4px; }
.msg small { display: block; margin-top: 0.35rem; font: 500 0.7rem/1 var(--mono); color: var(--ink-soft); }
.flag { justify-self: stretch; display: flex; gap: 0.6rem; align-items: center; padding: 0.65rem 0.8rem; border: 1px dashed var(--copper); border-radius: 8px; font-size: 0.85rem; color: var(--ink); }
.flag b { color: var(--copper); font-family: var(--mono); font-weight: 500; font-size: 0.75rem; text-transform: uppercase; letter-spacing: 0.06em; }
.mock-note { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.8rem; }

/* Timeline of the sequence */
.ladder { list-style: none; margin: 0; padding: 0; display: grid; gap: 0; border-left: 2px solid var(--line); }
.ladder li { position: relative; display: grid; grid-template-columns: 6rem 1fr; gap: 1rem; padding: 0 0 1.6rem 1.4rem; }
.ladder li > * { min-width: 0; }
.ladder li::before { content: ""; position: absolute; left: -7px; top: 0.35rem; width: 12px; height: 12px; border-radius: 50%; background: var(--paper); border: 2px solid var(--copper); }
.ladder .day { font: 600 0.9rem/1.6 var(--mono); color: var(--copper); }
@media (max-width: 520px) { .ladder li { grid-template-columns: 1fr; gap: 0.2rem; } }

.cols-2 { display: grid; grid-template-columns: repeat(auto-fit, minmax(17rem, 1fr)); gap: 2rem 3rem; }
.cols-2 > div { display: grid; gap: 0.6rem; align-content: start; }
.checks { list-style: none; padding: 0; margin: 0; display: grid; gap: 0.6rem; }
.checks li { padding-left: 1.6rem; position: relative; }
.checks li::before { content: ""; position: absolute; left: 0; top: 0.55em; width: 0.8rem; height: 2px; background: var(--copper); }

.faq { display: grid; gap: 0; border-top: 1px solid var(--line); }
.faq details { border-bottom: 1px solid var(--line); padding-block: 1.1rem; }
.faq summary { cursor: pointer; font: 600 1.08rem/1.4 var(--display); list-style: none; display: flex; justify-content: space-between; gap: 1rem; }
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after { content: "+"; font-family: var(--mono); color: var(--copper); }
.faq details[open] summary::after { content: "–"; }
.faq details p { margin-top: 0.7rem; color: var(--ink-soft); }

.cta-band { background: var(--ink); color: var(--paper); }
.cta-band .lede { color: color-mix(in srgb, var(--paper) 75%, transparent); }
.cta-band .btn-primary { background: var(--copper); color: #fff; }
.cta-band .btn-primary:hover { background: var(--paper); color: var(--ink); }
.cta-band .email { color: var(--paper); }

@media (prefers-reduced-motion: no-preference) {
  .btn, .nav a, a.idea h3 { transition: color 0.15s, background-color 0.15s, border-color 0.15s; }
}
.split h1 { font-size: clamp(2.2rem, 4.6vw, 3.6rem); }

/* ---------- Phone layout ---------- */
.mobile-cta { display: none; }
[id] { scroll-margin-top: 1rem; }
.btn { min-height: 48px; justify-content: center; }
@media (max-width: 640px) {
  body { font-size: 1rem; padding-bottom: calc(76px + env(safe-area-inset-bottom, 0px)); }
  section { padding-block: 3rem; }
  .hero .wrap { padding-block: 2.25rem 2.5rem; gap: 1.25rem; }
  .site-head .wrap { padding-block: 0.75rem; row-gap: 0.25rem; }
  .nav { gap: 0.25rem 1.1rem; }
  .nav a { display: inline-block; padding-block: 0.6rem; }
  .actions .btn { flex: 1 1 10rem; }
  .section-head { margin-bottom: 1.75rem; }
  .steps { gap: 1.5rem; }
  .facts { gap: 1.5rem; }
  .site-foot .wrap { flex-direction: column; }
  .site-foot a { display: inline-block; padding-block: 0.4rem; }
  .mock { border-radius: 12px; }
  .inv { gap: 0.2rem 0.6rem; padding: 0.8rem 0.9rem; }
  .inv dd { font-size: 0.82rem; white-space: nowrap; }
  .thread { padding: 0.9rem; }
  .msg { max-width: 92%; font-size: 0.9rem; }
  .ladder li { padding-bottom: 1.25rem; }
  .faq summary { padding-block: 0.3rem; }

  /* Fixed contact bar: one tap to reach us from any point on the page */
  .mobile-cta {
    display: flex; gap: 0.6rem;
    position: fixed; left: 0; right: 0; bottom: 0; z-index: 20;
    padding-top: 0.7rem;
    padding-bottom: calc(0.7rem + env(safe-area-inset-bottom, 0px));
    padding-left: max(16px, env(safe-area-inset-left, 0px));
    padding-right: max(16px, env(safe-area-inset-right, 0px));
    background: var(--paper); border-top: 1px solid var(--line);
    box-shadow: 0 -8px 24px -16px rgba(20, 37, 32, 0.4);
  }
  .mobile-cta .btn { flex: 1; }
}
.bio { display: grid; gap: 0.9rem; margin-top: 1.2rem; }
@media (max-width: 640px) { .idea .pill { justify-self: start; } }
.reach { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem 1.75rem; }
.wa-ico { width: 1.15em; height: 1.15em; flex: none; }
.small { font-size: 0.92rem; }
.cta-band .muted { color: color-mix(in srgb, var(--paper) 70%, transparent); }