/* ==========================================================================
   components.css — Reusable UI primitives used across pages:
   buttons, cards, telemetry chips, stat blocks, accordion, route line.
   ========================================================================== */

/* --- Buttons ------------------------------------------------------------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: var(--font-display); font-weight: 500; font-size: var(--step--1);
  letter-spacing: 0.01em;
  padding: 0.7rem 1.25rem;
  border-radius: var(--radius-pill);
  border: 1px solid transparent;
  transition: transform var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease), color var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}
.btn:active { transform: translateY(1px); }
.btn--primary { background: var(--signal); color: #fff; }
.btn--primary:hover { background: var(--signal-deep); }
.btn--brand { background: var(--pine); color: #fff; }
.btn--brand:hover { background: var(--pine-soft); }
.btn--ghost { border-color: var(--line-strong); color: var(--ink); }
.btn--ghost:hover { border-color: var(--ink); }
.btn--on-dark { border-color: rgba(255,255,255,0.25); color: var(--mist); }
.btn--on-dark:hover { border-color: var(--mist); background: rgba(255,255,255,0.06); }
.btn__arrow { transition: transform var(--dur) var(--ease); }
.btn:hover .btn__arrow { transform: translateX(3px); }

/* --- Telemetry chip — a monospace data marker, the page's recurring motif - */
.chip {
  display: inline-flex; align-items: center; gap: 0.4rem;
  font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.06em;
  padding: 0.28rem 0.6rem;
  border: 1px solid var(--line-strong);
  border-radius: var(--radius-s);
  color: var(--text-muted); background: var(--paper);
}
.chip__dot { width: 7px; height: 7px; border-radius: 50%; background: var(--signal); box-shadow: 0 0 0 0 rgba(255,106,61,0.6); animation: pulse 2.4s var(--ease) infinite; }
.section--dark .chip { background: rgba(255,255,255,0.04); border-color: rgba(255,255,255,0.18); color: var(--sage-soft); }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(255,106,61,0.5); } 70% { box-shadow: 0 0 0 7px rgba(255,106,61,0); } 100% { box-shadow: 0 0 0 0 rgba(255,106,61,0); } }

/* --- Card ---------------------------------------------------------------- */
.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-l);
  padding: var(--space-l);
  transition: transform var(--dur) var(--ease), box-shadow var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-m); border-color: var(--line-strong); }
.card__icon { width: 44px; height: 44px; display: grid; place-items: center; border-radius: var(--radius-m); background: color-mix(in srgb, var(--pine) 12%, transparent); color: var(--pine); margin-bottom: var(--space-m); }
.card__icon svg { width: 22px; height: 22px; }
.card h3 { font-size: var(--step-1); margin-bottom: var(--space-2xs); }
.card p { color: var(--text-muted); font-size: var(--step--1); }

.grid { display: grid; gap: var(--space-m); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 900px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

/* --- Stat block ---------------------------------------------------------- */
.stat__num { font-family: var(--font-display); font-weight: 700; font-size: var(--step-4); line-height: 1; letter-spacing: -0.03em; color: var(--ink); }
.section--dark .stat__num { color: var(--mist); }
.stat__num .unit { color: var(--signal); }
.stat__label { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: 0.04em; color: var(--text-muted); margin-top: var(--space-2xs); }
.section--dark .stat__label { color: var(--sage); }

/* --- Logo / trust row ---------------------------------------------------- */
.logo-row { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-l); opacity: 0.7; }
.logo-row span { font-family: var(--font-display); font-weight: 700; font-size: 1.15rem; color: var(--text-muted); letter-spacing: -0.01em; }

/* --- Accordion (FAQ) ----------------------------------------------------- */
.accordion { border-top: 1px solid var(--line); }
.accordion__item { border-bottom: 1px solid var(--line); }
.accordion__trigger {
  width: 100%; display: flex; justify-content: space-between; align-items: center; gap: var(--space-m);
  padding: var(--space-m) 0; text-align: left;
  font-family: var(--font-display); font-weight: 500; font-size: var(--step-1); color: var(--ink);
}
.accordion__icon { flex-shrink: 0; width: 22px; height: 22px; position: relative; }
.accordion__icon::before, .accordion__icon::after { content: ""; position: absolute; inset: 0; margin: auto; background: var(--brand); transition: transform var(--dur) var(--ease); }
.accordion__icon::before { width: 14px; height: 2px; }
.accordion__icon::after  { width: 2px; height: 14px; }
.accordion__trigger[aria-expanded="true"] .accordion__icon::after { transform: scaleY(0); }
.accordion__panel { overflow: hidden; height: 0; transition: height var(--dur) var(--ease); }
.accordion__panel p { padding-bottom: var(--space-m); color: var(--text-muted); max-width: 68ch; }

/* --- Route line: the signature flow motif ------------------------------- */
.route-line { width: 100%; height: 2px; background: var(--line); position: relative; overflow: hidden; }
.route-line::after {
  content: ""; position: absolute; top: 0; left: -30%; width: 30%; height: 100%;
  background: linear-gradient(90deg, transparent, var(--signal), transparent);
  animation: lope 3.2s var(--ease) infinite;
}
@keyframes lope { to { left: 130%; } }

/* --- Scroll reveal ------------------------------------------------------- */
[data-reveal] { opacity: 0; transform: translateY(18px); transition: opacity var(--dur-slow) var(--ease), transform var(--dur-slow) var(--ease); }
[data-reveal].is-visible { opacity: 1; transform: none; }

/* --- Forms --------------------------------------------------------------- */
.field { display: flex; flex-direction: column; gap: var(--space-2xs); margin-bottom: var(--space-m); }
.field label { font-family: var(--font-mono); font-size: var(--step--1); letter-spacing: 0.04em; color: var(--text-muted); }
.field input, .field select, .field textarea {
  padding: 0.75rem 0.9rem; border: 1px solid var(--line-strong); border-radius: var(--radius-m);
  background: var(--paper); transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease);
}
.field input:focus, .field select:focus, .field textarea:focus { outline: none; border-color: var(--pine); box-shadow: 0 0 0 3px color-mix(in srgb, var(--pine) 18%, transparent); }
.field--error input, .field--error textarea { border-color: var(--signal); }
.field__hint { font-size: var(--step--1); color: var(--signal-deep); min-height: 1.2em; }