/* ============================================================================
   Blitz Wallet — Shared Component Primitives
   Reusable UI atoms built on the tokens in index.css. Link this right after
   index.css on every page. Prefer these classes over hand-rolled equivalents
   so buttons, spinners, error boxes, toasts, and loaders stay consistent.
   See docs/design-system.md.
   ========================================================================== */

/* --- Buttons -------------------------------------------------------------- */
/* Canonical button, matching the home hero (index.html). Solid Blitz blue. */

.btn-primary,
.btn-secondary {
  min-height: 48px;
  padding: 0.9rem 1.25rem;
  border-radius: var(--radius-card);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  border: 1px solid transparent;
  text-decoration: none;
  font-family: var(--font-sans);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition:
    transform var(--ease-micro),
    background var(--ease-micro),
    color var(--ease-micro),
    box-shadow var(--ease-micro);
}

.btn-primary {
  background: var(--color-brand);
  color: #fff;
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 18px 34px var(--color-brand-strong);
}

/* Light-surface secondary: brand outline. (The home hero ships its own
   over-dark .btn-secondary, which overrides this on that page.) */
.btn-secondary {
  background: transparent;
  color: var(--color-brand);
  border-color: var(--color-surface-offset);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  background: var(--color-surface-offset);
}

/* --- Spinner -------------------------------------------------------------- */
/* Single canonical spinner. Size via --spinner-size (default 40px). */

.spinner {
  width: var(--spinner-size, 40px);
  height: var(--spinner-size, 40px);
  border-radius: 50%;
  border: 4px solid color-mix(in srgb, var(--color-brand) 16%, transparent);
  border-top-color: var(--color-brand);
  animation: spin 0.95s linear infinite;
}

@keyframes spin {
  from {
    transform: rotate(0deg);
  }
  to {
    transform: rotate(360deg);
  }
}

/* --- Full-screen branded loader ------------------------------------------ */

.loading-screen {
  width: 100%;
  min-height: 100dvh;
  display: grid;
  place-items: center;
  padding: var(--space-gutter);
}

.loading-screen[hidden],
.loading-screen.hidden {
  display: none;
}

.loading-screen-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.25rem;
}

.loading-wordmark {
  width: 220px;
  max-width: 65vw;
}

.loading-copy {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.loading-copy h1 {
  margin: 0;
  color: var(--color-ink);
  font-size: clamp(2rem, 4vw, 3.5rem);
  font-weight: 400;
}

.loading-copy p {
  margin: 0;
  color: var(--color-ink-70);
}

/* --- Error box ------------------------------------------------------------ */
/* Single error component. Replaces .error-message / .error-box /
   .loading-error / .creating-error. */

.error-box {
  padding: 2rem;
  border-radius: 12px;
  background: var(--color-error-bg);
  border: 1px solid var(--color-error-border);
  text-align: center;
}

.error-box h2 {
  color: var(--color-error-text);
  margin-bottom: 1rem;
}

.error-box p {
  color: var(--color-error-text);
  margin-top: 0.5rem;
}

/* --- Toast / overlay ------------------------------------------------------ */
/* Single notification pattern. Replaces native alert() and button-text
   swaps for "Copied!", validation and network errors. */

.overlay-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  z-index: 9990;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1rem;
}

.overlay-backdrop.active {
  display: flex;
}

.overlay-card {
  background: var(--color-surface);
  border-radius: 16px;
  padding: 2rem;
  max-width: 420px;
  width: 100%;
  position: relative;
  box-shadow: var(--shadow-card);
}

.overlay-title {
  font-size: 1.1rem;
  font-weight: 500;
  margin-bottom: 0.75rem;
  color: var(--color-ink);
}

.overlay-body {
  font-size: 0.9rem;
  line-height: 1.5;
  color: var(--color-ink-70);
  margin-bottom: 1rem;
}

/* --- Layout utilities ----------------------------------------------------- */

.section {
  padding: var(--space-section) var(--space-gutter);
}

.section-inner {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.hairline {
  border: 1px solid var(--color-hairline);
}

@media (max-width: 680px) {
  .section {
    padding-left: 1rem;
    padding-right: 1rem;
  }
}

/* --- Reduced motion ------------------------------------------------------- */

@media (prefers-reduced-motion: reduce) {
  .btn-primary,
  .btn-secondary {
    transition: none;
  }
  .spinner {
    animation-duration: 2s;
  }
}