/* Radeux, radeux.co
   Visual world: quiet infrastructure.
   Cool ink on a faintly green off-white. One accent, a signal green, spent only
   on live state, links and the primary action. Type carries the page. */

:root {
  --ground:      #F5F7F4;
  --surface:     #FFFFFF;
  --ink:         #14181A;
  --ink-soft:    #39423E;
  --muted:       #59635F;
  --line:        #DCE2DC;
  --line-strong: #C3CCC4;
  --signal:      #146B47;
  --signal-lit:  #21935F;
  --signal-wash: #E8F1EB;

  --serif: "IBM Plex Serif", Georgia, "Times New Roman", serif;
  --sans:  "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

  --measure: 34rem;
  --page:    56rem;
  --gutter:  clamp(1.25rem, 5vw, 3rem);

  --step-d:  clamp(2.375rem, 1.55rem + 3.6vw, 4.25rem);
  --step-2:  clamp(1.5rem, 1.28rem + 0.95vw, 2.05rem);
  --step-1:  clamp(1.125rem, 1.06rem + 0.3vw, 1.3rem);
  --step-0:  1.0625rem;
  --step-s:  0.875rem;
  --step-xs: 0.8125rem;
}

@media (prefers-color-scheme: dark) {
  :root {
    --ground:      #0E1113;
    --surface:     #151A1C;
    --ink:         #E9EDE9;
    --ink-soft:    #C2CAC5;
    --muted:       #98A39D;
    --line:        #262D2F;
    --line-strong: #38423F;
    --signal:      #4FBE87;
    --signal-lit:  #61D398;
    --signal-wash: #16221C;
  }
}

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

html {
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
}

body {
  margin: 0;
  background: var(--ground);
  color: var(--ink);
  font-family: var(--sans);
  font-size: var(--step-0);
  line-height: 1.65;
  font-feature-settings: "kern", "liga";
  -webkit-font-smoothing: antialiased;
}

/* Browser surfaces, themed rather than inherited. */
::selection { background: var(--signal); color: var(--ground); }
:focus-visible {
  outline: 2px solid var(--signal-lit);
  outline-offset: 3px;
  border-radius: 2px;
}
html { scrollbar-color: var(--line-strong) var(--ground); scrollbar-width: thin; caret-color: var(--signal); }
::-webkit-scrollbar { width: 11px; height: 11px; }
::-webkit-scrollbar-track { background: var(--ground); }
::-webkit-scrollbar-thumb {
  background: var(--line-strong);
  border: 3px solid var(--ground);
  border-radius: 6px;
}
::-webkit-scrollbar-thumb:hover { background: var(--muted); }

img { max-width: 100%; height: auto; }

/* ---------- Structure ---------- */

.wrap {
  max-width: var(--page);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.col { max-width: var(--measure); }

.rule {
  border: 0;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- Masthead ---------- */

.masthead {
  padding-block: 1.75rem;
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1.5rem;
  flex-wrap: wrap;
}

.wordmark {
  font-family: var(--sans);
  font-size: 1.0625rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--ink);
  text-decoration: none;
}

.masthead nav {
  display: flex;
  gap: 1.5rem;
  font-size: var(--step-s);
}

.masthead nav a { color: var(--muted); }
.masthead nav a:hover { color: var(--ink); }

/* ---------- Type ---------- */

h1, h2, h3 {
  font-family: var(--serif);
  font-weight: 500;
  line-height: 1.14;
  letter-spacing: -0.015em;
  text-wrap: balance;
  margin: 0;
}

h1 {
  font-size: var(--step-d);
  line-height: 1.04;
  letter-spacing: -0.028em;
  max-width: 24ch;
}

h2 {
  font-size: var(--step-2);
  max-width: 22ch;
}

h3 {
  font-family: var(--sans);
  font-size: var(--step-0);
  font-weight: 600;
  line-height: 1.4;
  letter-spacing: 0;
}

p { margin: 0; max-width: var(--measure); }

.lede {
  font-size: var(--step-1);
  line-height: 1.55;
  color: var(--ink-soft);
}

.small { font-size: var(--step-s); color: var(--muted); line-height: 1.6; }

a { color: var(--signal); text-decoration: underline; text-underline-offset: 0.18em; text-decoration-thickness: 1px; }
a:hover { text-decoration-thickness: 2px; }

strong { font-weight: 600; color: var(--ink); }

/* ---------- Sections ---------- */

section { padding-block: clamp(3.5rem, 8vw, 6rem); }

.stack     { display: flex; flex-direction: column; gap: 1.25rem; }
.stack-sm  { display: flex; flex-direction: column; gap: 0.65rem; }
.stack-lg  { display: flex; flex-direction: column; gap: 2.25rem; }

.split {
  display: grid;
  grid-template-columns: minmax(0, 13rem) minmax(0, 1fr);
  gap: clamp(1.5rem, 4vw, 3rem);
  align-items: start;
}

@media (max-width: 56rem) {
  .split { grid-template-columns: minmax(0, 1fr); gap: 1.5rem; }
}

/* ---------- Hero ---------- */

.hero { padding-block: clamp(3rem, 9vw, 6.5rem) clamp(3rem, 7vw, 5rem); }

.hero h1 { margin-bottom: 1.5rem; }
.hero .lede + .lede { margin-top: 1rem; }

.live {
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-size: var(--step-xs);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  font-weight: 500;
  color: var(--signal);
  margin-bottom: 1.5rem;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--signal-lit);
  box-shadow: 0 0 0 0 color-mix(in srgb, var(--signal-lit) 55%, transparent);
  animation: beat 3.4s cubic-bezier(0.22, 1, 0.36, 1) infinite;
}

@keyframes beat {
  0%       { box-shadow: 0 0 0 0 color-mix(in srgb, var(--signal-lit) 50%, transparent); }
  35%, 100%{ box-shadow: 0 0 0 9px color-mix(in srgb, var(--signal-lit) 0%, transparent); }
}

@media (prefers-reduced-motion: reduce) {
  .live-dot { animation: none; }
}

/* ---------- Actions ---------- */

.actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
  margin-top: 2.25rem;
}

.button {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  background: var(--signal);
  color: var(--ground);
  font-family: var(--sans);
  font-size: var(--step-0);
  font-weight: 500;
  text-decoration: none;
  padding: 0.8rem 1.4rem;
  border-radius: 3px;
  border: 1px solid transparent;
  box-shadow: 0 1px 2px rgba(10, 20, 15, 0.16), 0 6px 18px -8px rgba(10, 20, 15, 0.34);
  transition: background 160ms cubic-bezier(0.22, 1, 0.36, 1),
              transform 160ms cubic-bezier(0.22, 1, 0.36, 1),
              box-shadow 160ms cubic-bezier(0.22, 1, 0.36, 1);
}

.button:hover {
  background: var(--signal-lit);
  transform: translateY(-1px);
  box-shadow: 0 2px 4px rgba(10, 20, 15, 0.18), 0 12px 26px -10px rgba(10, 20, 15, 0.4);
}

.button:active { transform: translateY(0); }

.button .arrow { transition: transform 220ms cubic-bezier(0.22, 1, 0.36, 1); }
.button:hover .arrow { transform: translateX(3px); }

@media (prefers-reduced-motion: reduce) {
  .button, .button .arrow { transition: none; }
  .button:hover { transform: none; }
}

.link-plain { color: var(--ink-soft); text-decoration-color: var(--line-strong); }
.link-plain:hover { color: var(--ink); text-decoration-color: currentColor; }

/* ---------- Ledger (a typical week) ---------- */

.ledger {
  border-top: 1px solid var(--line);
}

.ledger-row {
  display: grid;
  grid-template-columns: 5.5rem minmax(0, 1fr);
  gap: 1.25rem;
  padding-block: 0.95rem;
  border-bottom: 1px solid var(--line);
  align-items: baseline;
}

.ledger-day {
  font-size: var(--step-xs);
  letter-spacing: 0.09em;
  text-transform: uppercase;
  color: var(--muted);
  font-variant-numeric: tabular-nums;
}

.ledger-row p { font-size: var(--step-s); color: var(--ink-soft); max-width: none; }

.ledger-row.is-quiet .ledger-day,
.ledger-row.is-quiet p { color: var(--muted); }

@media (max-width: 34rem) {
  .ledger-row { grid-template-columns: minmax(0, 1fr); gap: 0.2rem; }
}

/* ---------- Lists ---------- */

.list { list-style: none; margin: 0; padding: 0; }

.list > li {
  padding-block: 1.15rem;
  border-bottom: 1px solid var(--line);
}

.list > li:first-child { border-top: 1px solid var(--line); }
.list h3 { margin-bottom: 0.3rem; }
.list p { font-size: var(--step-s); color: var(--muted); }

.plain-list { list-style: none; margin: 0; padding: 0; }
.plain-list > li { padding-block: 0.4rem; color: var(--ink-soft); }
.plain-list > li::before {
  content: "";
  display: inline-block;
  width: 0.9rem;
  height: 1px;
  background: var(--line-strong);
  vertical-align: 0.32em;
  margin-right: 0.7rem;
}

/* ---------- Aside panel ---------- */

.panel {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: clamp(1.5rem, 4vw, 2.25rem);
  box-shadow: 0 1px 2px rgba(15, 25, 20, 0.04), 0 14px 34px -22px rgba(15, 25, 20, 0.24);
}

.panel h2 { margin-bottom: 1rem; }

.mailto {
  font-family: var(--sans);
  font-size: var(--step-1);
  font-weight: 500;
  word-break: break-all;
}

/* ---------- Legal pages ---------- */

.legal { padding-block: clamp(2.5rem, 6vw, 4rem) clamp(4rem, 9vw, 6rem); }
.legal h1 { max-width: 24ch; margin-bottom: 0.75rem; }
.legal h2 { margin-top: 3rem; margin-bottom: 0.9rem; }
.legal h3 { margin-top: 1.75rem; margin-bottom: 0.35rem; }
.legal p, .legal li { max-width: var(--measure); }
.legal p + p { margin-top: 0.9rem; }
.legal ul { padding-left: 1.15rem; margin: 0.9rem 0 0; }
.legal li { margin-bottom: 0.45rem; }
.legal li::marker { color: var(--line-strong); }

.notice {
  border-left: 1px solid var(--signal);
  background: var(--signal-wash);
  padding: 1.15rem 1.4rem;
  border-radius: 0 4px 4px 0;
  margin-top: 1.5rem;
}

.notice p { font-size: var(--step-s); color: var(--ink-soft); }

/* ---------- Footer ---------- */

.foot {
  border-top: 1px solid var(--line);
  padding-block: 2.5rem 3.5rem;
}

.foot-grid {
  display: flex;
  justify-content: space-between;
  gap: 2rem 3rem;
  flex-wrap: wrap;
  align-items: start;
}

.foot nav { display: flex; gap: 1.5rem; flex-wrap: wrap; font-size: var(--step-s); }
.foot nav a { color: var(--muted); }
.foot nav a:hover { color: var(--ink); }
.foot .small { max-width: 30ch; }