/* ------------------------------------------------------------------
   Components: buttons, chips, fields, toasts, pulse, page heads
   ------------------------------------------------------------------ */

.icon { width: 1.1em; height: 1.1em; flex: none; }

.button {
  --bg: var(--ink);
  --fg: var(--paper);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  min-height: 3rem;
  padding: 0.8rem 1.4rem;
  border: 1px solid var(--bg);
  border-radius: 999px;
  background: var(--bg);
  color: var(--fg);
  font-size: 0.97rem;
  font-weight: 500;
  letter-spacing: -0.005em;
  line-height: 1.1;
  text-decoration: none;
  cursor: pointer;
  transition: transform 0.4s var(--ease-out), background-color 0.25s, border-color 0.25s, color 0.25s, box-shadow 0.4s var(--ease-out);
}

.button:hover { transform: translateY(-2px); box-shadow: 0 10px 24px -12px color-mix(in srgb, var(--bg) 70%, transparent); }
.button:active { transform: translateY(0); }
.button .icon--arrow { transition: transform 0.4s var(--ease-out); }
.button:hover .icon--arrow { transform: translateX(4px); }
.button:disabled { opacity: 0.65; cursor: progress; transform: none; }

.button--primary { --bg: var(--ink); --fg: var(--paper); }
.button--signal { --bg: var(--signal); --fg: var(--signal-ink); }
.button--danger { --bg: var(--danger); --fg: #fff; }
.button--ghost { --bg: transparent; --fg: var(--ink); border-color: var(--rule-strong); }
.button--ghost:hover { border-color: var(--ink); box-shadow: none; }
.button--small { min-height: 2.4rem; padding: 0.5rem 1rem; font-size: 0.88rem; }
.button--block { width: 100%; }
.button.is-copied { --bg: var(--moss); --fg: var(--paper); border-color: var(--moss); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1.5rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink);
  border-bottom: 1px solid var(--rule-strong);
  padding-bottom: 0.2rem;
  transition: border-color 0.3s, gap 0.4s var(--ease-out);
}
.link-arrow:hover { border-color: var(--signal); gap: 0.85rem; }

.link-button {
  padding: 0;
  border: 0;
  background: none;
  color: inherit;
  text-decoration: underline;
  text-underline-offset: 0.2em;
  cursor: pointer;
}
.link-button--danger { color: var(--danger); }

.chip, .tag {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--ink-2);
  white-space: nowrap;
  transition: background-color 0.25s, color 0.25s, border-color 0.25s;
}

a.chip:hover, a.tag:hover { border-color: var(--ink); color: var(--ink); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chip--static { text-transform: none; letter-spacing: 0.02em; }
.tag { padding: 0.15rem 0.55rem; }
.tag--draft { border-color: var(--signal); color: var(--signal); }

.filters { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-top: 2.5rem; }

/* Pulse: live node status --------------------------------------- */

.pulse {
  display: inline-flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.35rem 0.65rem;
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ink-2);
}

.pulse__name { color: var(--ink); font-weight: 550; }
.pulse__sep { color: var(--rule-strong); }

.pulse__dot {
  position: relative;
  display: inline-block;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--muted);
}

.pulse--live .pulse__dot, .created__eyebrow .pulse__dot { background: var(--signal); }
.pulse--live .pulse__dot::after, .created__eyebrow .pulse__dot::after {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: var(--signal);
  animation: ping 2s var(--ease-out) infinite;
}
.pulse--quiet .pulse__dot { background: color-mix(in srgb, var(--signal) 50%, var(--muted)); }
.pulse--down .pulse__dot { background: var(--danger); }

@keyframes ping { 0% { transform: scale(1); opacity: 0.7; } 100% { transform: scale(3.2); opacity: 0; } }

/* Fields -------------------------------------------------------- */

.stack { display: grid; gap: 1.25rem; margin-top: 2rem; }
.narrow-form { max-width: 28rem; }

.field { display: grid; gap: 0.45rem; margin: 0; padding: 0; border: 0; min-width: 0; }

.field__label {
  font-family: var(--font-mono);
  font-size: var(--step--2);
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--muted);
  padding: 0;
}

.field__input {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--rule-strong);
  border-radius: var(--radius-sm);
  background: var(--surface);
  color: var(--ink);
  font: inherit;
  font-size: 1rem;
  transition: border-color 0.2s, box-shadow 0.3s;
}
.field__input::placeholder { color: color-mix(in srgb, var(--muted) 70%, transparent); }
.field__input:focus { outline: none; border-color: var(--moss); box-shadow: 0 0 0 4px color-mix(in srgb, var(--moss) 16%, transparent); }
textarea.field__input { resize: vertical; }

.field__input--title {
  font-family: var(--font-display);
  font-size: var(--step-2);
  letter-spacing: -0.02em;
  padding: 0.6rem 1rem;
}

.check { display: inline-flex; gap: 0.5rem; align-items: center; color: var(--muted); }

.segmented {
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.25rem;
  padding: 0.25rem;
  border: 1px solid var(--rule-strong);
  border-radius: 999px;
  background: var(--surface);
  width: fit-content;
}

.segmented__option { position: relative; cursor: pointer; }
.segmented__option input { position: absolute; opacity: 0; pointer-events: none; }
.segmented__option span {
  display: block;
  padding: 0.5rem 0.95rem;
  border-radius: 999px;
  font-size: 0.9rem;
  color: var(--ink-2);
  transition: background-color 0.3s var(--ease-out), color 0.3s;
}
.segmented__option input:checked + span { background: var(--ink); color: var(--paper); }
.segmented__option input:focus-visible + span { outline: 2px solid var(--signal); outline-offset: 2px; }

.fineprint { font-size: var(--step--1); line-height: 1.55; color: var(--muted); }

.form-errors {
  padding: 1rem 1.25rem;
  border: 1px solid var(--danger);
  border-radius: var(--radius-sm);
  color: var(--danger);
}

/* Toasts -------------------------------------------------------- */

.toasts {
  position: fixed;
  left: 50%;
  bottom: 1.5rem;
  z-index: 160;
  display: grid;
  gap: 0.5rem;
  transform: translateX(-50%);
  width: max-content;
  max-width: calc(100vw - 2rem);
}

.toast {
  padding: 0.8rem 1.25rem;
  border-radius: 999px;
  background: var(--ink);
  color: var(--paper);
  font-size: 0.93rem;
  box-shadow: var(--shadow);
  animation: toast-in 0.6s var(--ease-out) both;
}
.toast--alert { background: var(--danger); color: #fff; }
.is-leaving .toast { animation: toast-out 0.5s var(--ease-in-out) forwards; }

@keyframes toast-in { from { opacity: 0; transform: translateY(16px) scale(0.96); } }
@keyframes toast-out { to { opacity: 0; transform: translateY(16px); } }

/* Page heads ---------------------------------------------------- */

.page-head {
  padding-top: calc(var(--header-h) + clamp(3rem, 9vw, 8rem));
  padding-bottom: clamp(2rem, 5vw, 4rem);
}

.page-head__title {
  margin-top: 1.25rem;
  font-size: var(--step-5);
  font-weight: 320;
  line-height: 0.9;
  letter-spacing: -0.045em;
  font-variation-settings: "SOFT" 30, "WONK" 0, "opsz" 144;
  animation: rise-in 1.1s var(--ease-out) both;
}

.page-head__title--small { font-size: var(--step-4); }

.page-head__lede {
  max-width: 38rem;
  margin-top: 2.5rem;
  font-family: var(--font-display);
  font-size: var(--step-1);
  font-weight: 340;
  line-height: 1.45;
  color: var(--ink-2);
  animation: rise-in 1.1s 0.12s var(--ease-out) both;
}

@keyframes rise-in { from { opacity: 0; transform: translateY(28px); } }

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

.section { padding-block: clamp(4.5rem, 11vw, 10rem) 0; }
.section--tight { padding-block: 0; }

.section__head {
  display: grid;
  grid-template-columns: minmax(3rem, 1fr) 11fr;
  align-items: end;
  gap: 1rem 1.5rem;
  margin-bottom: clamp(2.5rem, 5vw, 4.5rem);
  padding-top: 1.1rem;
  border-top: 1px solid var(--rule-strong);
}

.section__head .section__title { grid-column: 2; }
.section__head .section__more { grid-column: 2; margin-top: 0; justify-self: start; }

.section__index {
  align-self: start;
  color: var(--signal);
  font-size: var(--step--1);
}

.section__title {
  font-size: var(--step-4);
  font-weight: 330;
  line-height: 0.96;
  letter-spacing: -0.04em;
}

@media (min-width: 900px) {
  .section__head { grid-template-columns: 1fr 8fr 3fr; }
  .section__head .section__more { grid-column: 3; justify-self: end; align-self: end; }
}

/* Scroll-driven reveals ----------------------------------------- */

@supports (animation-timeline: view()) {
  @media (prefers-reduced-motion: no-preference) {
    .section__head,
    .post-row,
    .figure,
    .stat,
    .primer__list li,
    .node-teaser__radar,
    .phone,
    .neighbors tr,
    .activity,
    .hops,
    .scopes {
      animation: reveal linear both;
      animation-timeline: view();
      animation-range: entry 0% entry 45%;
    }
  }
}

@keyframes reveal { from { opacity: 0; transform: translateY(36px); } }