/* ==========================================================
   ACMOBOOK Phase 1 Design System (Batch 1)
   Scoped tokens — do not break BackStage / Admin / Partner
   ========================================================== */

:root {
  --acm-primary: #6C63FF;
  --acm-primary-hover: #5648F5;
  --acm-primary-soft: #EEF0FF;
  --acm-text: #0F172A;
  --acm-text-muted: #64748B;
  --acm-surface: #FFFFFF;
  --acm-surface-soft: #F8FAFC;
  --acm-border: #E2E8F0;
  --acm-success: #16A34A;
  --acm-warning: #D97706;
  --acm-danger: #DC2626;
  --acm-radius: 10px;
  --acm-radius-sm: 8px;
  --acm-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
  --acm-shadow-sticky: 0 -4px 20px rgba(15, 23, 42, 0.08);
  --acm-space-1: 8px;
  --acm-space-2: 12px;
  --acm-space-3: 16px;
  --acm-space-4: 24px;
  --acm-space-5: 32px;
  --acm-space-6: 48px;
  --acm-touch: 44px;
  --acm-header-h: 64px;
  --acm-bottom-nav-h: 64px;
  --acm-font: "Poppins", system-ui, -apple-system, sans-serif;
  --acm-max: 1120px;

  /* Bridge legacy header vars toward brand family (safe) */
  --primary: var(--acm-primary);
  --primary-dark: var(--acm-primary-hover);
}

/* Shell body padding for mobile chrome */
body.page-home,
body.acm-shell {
  font-family: var(--acm-font);
  color: var(--acm-text);
  background: var(--acm-surface);
}

@media (max-width: 991.98px) {
  body.acm-shell .site-main,
  body.page-home .site-main {
    padding-bottom: calc(var(--acm-bottom-nav-h) + env(safe-area-inset-bottom, 0px) + 12px);
  }
}

/* ---------- Primitives ---------- */
.acm-container {
  width: min(100% - 32px, var(--acm-max));
  margin-inline: auto;
}

.acm-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  min-height: var(--acm-touch);
  padding: 0 20px;
  border-radius: var(--acm-radius-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.2;
  text-decoration: none;
  cursor: pointer;
  transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.acm-btn--primary {
  background: var(--acm-primary);
  color: #fff;
}

.acm-btn--primary:hover,
.acm-btn--primary:focus-visible {
  background: var(--acm-primary-hover);
  color: #fff;
}

.acm-btn--secondary {
  background: var(--acm-surface);
  color: var(--acm-primary);
  border-color: var(--acm-primary);
}

.acm-btn--secondary:hover,
.acm-btn--secondary:focus-visible {
  background: var(--acm-primary-soft);
  color: var(--acm-primary-hover);
}

.acm-btn--ghost {
  background: transparent;
  color: var(--acm-text);
  border-color: var(--acm-border);
}

.acm-btn--ghost:hover {
  background: var(--acm-surface-soft);
}

.acm-btn--block {
  width: 100%;
}

.acm-link {
  color: var(--acm-primary);
  font-weight: 600;
  text-decoration: none;
}

.acm-link:hover {
  color: var(--acm-primary-hover);
  text-decoration: underline;
}

.acm-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  border-radius: 999px;
  background: var(--acm-primary-soft);
  color: var(--acm-primary);
  font-size: 0.75rem;
  font-weight: 600;
}

.acm-section {
  padding: var(--acm-space-5) 0;
}

@media (min-width: 768px) {
  .acm-section {
    padding: var(--acm-space-6) 0;
  }
}

.acm-section__head {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-end;
  justify-content: space-between;
  gap: var(--acm-space-3);
  margin-bottom: var(--acm-space-4);
}

.acm-section__head h2 {
  margin: 8px 0 4px;
  font-size: clamp(1.35rem, 2.5vw, 1.75rem);
  font-weight: 700;
  color: var(--acm-text);
  letter-spacing: -0.02em;
}

.acm-section__head p {
  margin: 0;
  color: var(--acm-text-muted);
  max-width: 36rem;
  font-size: 0.95rem;
}

.acm-empty {
  padding: var(--acm-space-5);
  text-align: center;
  background: var(--acm-surface-soft);
  border: 1px dashed var(--acm-border);
  border-radius: var(--acm-radius);
}

.acm-empty p {
  margin: 0 0 var(--acm-space-3);
  color: var(--acm-text-muted);
}

/* Auth gate foundation */
.acm-auth-gate {
  position: fixed;
  inset: 0;
  z-index: 12000;
  display: none;
  align-items: flex-end;
  justify-content: center;
  padding: env(safe-area-inset-top, 0) var(--acm-space-3) calc(env(safe-area-inset-bottom, 0px) + var(--acm-space-3));
  background: rgba(15, 23, 42, 0.45);
}

.acm-auth-gate.is-open {
  display: flex;
}

.acm-auth-gate__panel {
  width: min(100%, 420px);
  background: var(--acm-surface);
  border-radius: 16px 16px 12px 12px;
  box-shadow: var(--acm-shadow);
  padding: var(--acm-space-4);
}

@media (min-width: 768px) {
  .acm-auth-gate {
    align-items: center;
  }

  .acm-auth-gate__panel {
    border-radius: var(--acm-radius);
  }
}

.acm-auth-gate__title {
  margin: 0 0 8px;
  font-size: 1.125rem;
  font-weight: 700;
}

.acm-auth-gate__text {
  margin: 0 0 var(--acm-space-4);
  color: var(--acm-text-muted);
  font-size: 0.9375rem;
  line-height: 1.5;
}

.acm-auth-gate__actions {
  display: flex;
  flex-direction: column;
  gap: var(--acm-space-2);
}

.acm-sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}