/* ============================================================
   COMPONENT — Buttons
   .btn is the base; modifiers compose on top.
   Naming uses single-dash modifiers (.btn-primary) — new convention
   for components. Legacy double-dash (.container--wide) kept on
   existing classes only.

   Usage:
     <a class="btn btn-primary" href="…">Read full preview</a>
     <button class="btn btn-secondary">Save</button>
     <a class="btn btn-ghost" href="…">All venue guides ›</a>
   ============================================================ */

/* ---------- Base ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-sm);
  padding: 12px 22px;
  border: 1px solid transparent;
  background: transparent;
  color: inherit;
  font: 700 13px/1 var(--font-ui);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  cursor: pointer;
  transition:
    background var(--dur-fast) var(--ease-out),
    color var(--dur-fast) var(--ease-out),
    border-color var(--dur-fast) var(--ease-out);
  white-space: nowrap;
}
.btn:hover { text-decoration: none; }
.btn:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}
.btn[disabled],
.btn.is-disabled {
  opacity: 0.5;
  pointer-events: none;
}
.btn svg {
  width: 14px;
  height: 14px;
  flex-shrink: 0;
}

/* ---------- Variants ---------- */
.btn-primary {
  background: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--text-inverse);
}

.btn-secondary {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
}
.btn-secondary:hover {
  background: var(--color-accent);
  color: var(--text-inverse);
}

.btn-ghost {
  background: transparent;
  color: var(--color-accent);
  border-color: var(--color-accent);
  letter-spacing: 0.04em;
}

.btn-ghost:hover {
  color: var(--color-primary);
}

/* On dark surfaces — inverted primary (white pill on navy/red bg) */
.btn-on-dark {
  background: var(--text-inverse);
  color: var(--color-accent);
  border-color: var(--text-inverse);
}
.btn-on-dark:hover {
  background: var(--color-primary);
  color: var(--text-inverse);
  border-color: var(--color-primary);
}

/* ---------- Sizes ---------- */
.btn-sm {
  padding: 8px 14px;
  font-size: 11px;
}
.btn-lg {
  padding: 16px 28px;
  font-size: 14px;
}

/* ---------- Shape ---------- */
.btn-square { border-radius: var(--radius-md); }
.btn-block  { display: flex; width: 100%; }