/*
 * OAuth Buttons — social-auth-premium Sprint 1/2/3
 *
 * Shared styles for the "Continuer avec X" buttons used in the signup modal,
 * the dedicated signup page, and the sign-in page. The partial is
 * app/views/shared/_oauth_buttons.html.erb.
 *
 * Design intent:
 *   - Default skin uses var(--bg-surface) + var(--border-default), works in
 *     light + dark mode automatically via tokens.
 *   - Apple uses an inverted skin (black-on-white in light, white-on-black in
 *     dark) per Apple HIG.
 *   - GitHub uses a near-black skin for brand consistency.
 *   - All buttons share a single height/padding/typography baseline so they
 *     read as one stack.
 */

.oauth-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  width: 100%;
  min-height: 44px; /* WCAG 2.5.5 touch target */
  padding: 0.625rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  line-height: 1.2;
  border-radius: 0.625rem;
  border: 1px solid var(--border-default);
  background: var(--bg-surface);
  color: var(--text-primary);
  cursor: pointer;
  transition: background 120ms ease-out, border-color 120ms ease-out, box-shadow 120ms ease-out;
}

.oauth-btn:hover {
  background: var(--bg-surface-hover);
  border-color: var(--text-tertiary);
}

.oauth-btn:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.oauth-btn:active {
  transform: translateY(1px);
}

.oauth-btn-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  flex-shrink: 0;
}

.oauth-btn-label {
  flex: 1 1 auto;
  text-align: left;
  padding-left: 0.25rem;
}

/* Apple — inverted skin per HIG. */
.oauth-btn-apple {
  background: #000;
  color: #fff;
  border-color: #000;
}
.oauth-btn-apple:hover {
  background: #1a1a1a;
  border-color: #1a1a1a;
}
html[data-theme="dark"] .oauth-btn-apple {
  background: #fff;
  color: #000;
  border-color: #fff;
}
html[data-theme="dark"] .oauth-btn-apple:hover {
  background: #f0f0f0;
  border-color: #f0f0f0;
}

/* GitHub — near-black for brand identity. */
.oauth-btn-github {
  background: #24292f;
  color: #fff;
  border-color: #24292f;
}
.oauth-btn-github:hover {
  background: #32383f;
  border-color: #32383f;
}
html[data-theme="dark"] .oauth-btn-github {
  background: #f0f6fc;
  color: #0d1117;
  border-color: #f0f6fc;
}
html[data-theme="dark"] .oauth-btn-github:hover {
  background: #d0d7de;
  border-color: #d0d7de;
}

/* Divider between OAuth stack and email/password form. */
.oauth-divider {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin: 1.25rem 0;
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--text-tertiary);
}
.oauth-divider::before,
.oauth-divider::after {
  content: "";
  flex: 1 1 auto;
  height: 1px;
  background: var(--border-default);
}