/* ============================================================
   COMPONENT: Buttons & pills
   Reusable — candidate for the design system.
   ============================================================ */

.btn {
  --_bg: var(--color-surface);
  --_fg: var(--color-text);
  display: inline-flex;
  align-items: center;
  gap: 0.6em;
  padding: 0.95em 1.6em;
  background: var(--_bg);
  color: var(--_fg);
  border-radius: var(--radius-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  letter-spacing: 0.01em;
  line-height: 1;
  border: 1px solid var(--color-line);
  transition: background var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out);
}
/* Default buttons read as neutral grey and warm to accent on hover */
.btn:hover {
  transform: translateY(-2px);
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: transparent;
}
.btn:active { transform: translateY(0); }

/* Accent buttons are NOT filled by default — like everything else,
   orange appears only on hover. Kept as a semantic alias. */
.btn--accent:hover { --_bg: var(--color-accent-hover); }

.btn--ghost {
  --_bg: transparent;
  border-color: var(--color-line);
}
.btn--ghost:hover { --_bg: var(--color-surface); }

.btn--lg { padding: 1.1em 2em; font-size: var(--fs-body); }

/* Choice pills (services selector / tags) */
.pill {
  display: inline-flex;
  align-items: center;
  padding: 0.7em 1.25em;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-line);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: var(--fs-sm);
  font-weight: 500;
  transition: background var(--dur-fast) var(--ease-out),
              border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.pill:hover {
  background: var(--color-accent);
  color: var(--color-accent-ink);
  border-color: transparent;
}
/* No persistent orange selection — choosing a service auto-advances,
   and orange only ever shows on hover. */

/* Tag (non-interactive, used on project cards) */
.tag {
  display: inline-flex;
  padding: 0.45em 0.9em;
  border-radius: var(--radius-pill);
  border: 1px solid var(--color-line);
  font-size: var(--fs-label);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-text-dim);
}

/* Circular icon button (back arrow in contact flow) */
.icon-btn {
  display: inline-grid;
  place-items: center;
  width: 3.25rem;
  height: 3.25rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  border: 1px solid var(--color-line);
  color: var(--color-text);
  transition: background var(--dur-fast) var(--ease-out),
              transform var(--dur-fast) var(--ease-out);
}
.icon-btn:hover { background: var(--color-surface-2); transform: translateX(-3px); }

/* Underlined inline link (contact details) */
.link-underline {
  display: inline-block;
  padding-bottom: 0.25em;
  border-bottom: 1px solid var(--color-line);
  transition: border-color var(--dur-fast) var(--ease-out),
              color var(--dur-fast) var(--ease-out);
}
.link-underline:hover { border-color: var(--color-text); }