/* =========================================================
   SIGN-IN PROMPT MODAL (My Library entry, logged-out)
   All classes are prefixed `signin-` to avoid colliding with
   Bootstrap (.modal, .close, .btn) and the rest of the app.
   ========================================================= */

:root {
  --signin-brand: #6d28d9;
  --signin-brand-2: #8b5cf6;
  --signin-brand-soft: #f5f3ff;
  --signin-ink: #090f1a;
  --signin-muted: #64748b;
  --signin-border: #e2e8f0;
  --signin-bg: #f0f2f8;
  --signin-success: #10b981;
}

/* Hidden by default; JS toggles .is-open on the overlay to show it. */
.signin-overlay {
  display: none;
}
.signin-overlay.is-open {
  position: fixed;
  inset: 0;
  background: rgba(15, 23, 42, 0.5);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: grid;
  place-items: center;
  z-index: 2000;
  animation: signin-fade 0.25s ease;
}

.signin-modal {
  width: min(460px, 92vw);
  background: #fff;
  border-radius: 20px;
  box-shadow:
    0 30px 60px -20px rgba(15, 23, 42, 0.45),
    0 0 0 1px rgba(15, 23, 42, 0.04);
  overflow: hidden;
  position: relative;
  font-family: 'Inter', system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  color: var(--signin-ink);
  animation: signin-pop 0.4s cubic-bezier(0.2, 0.9, 0.3, 1.2);
}

.signin-close {
  position: absolute;
  top: 12px;
  right: 12px;
  width: 36px;
  height: 36px;
  border: 1px solid var(--signin-border);
  background: #fff;
  border-radius: 10px;
  cursor: pointer;
  color: var(--signin-ink);
  display: grid;
  place-items: center;
  z-index: 10;
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
  transition: background 0.15s ease, transform 0.15s ease;
  padding: 0;
}
.signin-close:hover {
  background: var(--signin-bg);
  color: var(--signin-brand);
  border-color: #cfc8e8;
}

.signin-hero {
  padding: 30px 32px 6px;
  text-align: center;
  background:
    radial-gradient(circle at 50% 0%, rgba(139, 92, 246, 0.18), transparent 65%),
    #fff;
  position: relative;
}
.signin-hero::before,
.signin-hero::after {
  content: '';
  position: absolute;
  border-radius: 50%;
  opacity: 0.5;
}
.signin-hero::before {
  width: 8px;
  height: 8px;
  top: 24px;
  left: 60px;
  background: var(--signin-brand-2);
  animation: signin-float 3s ease-in-out infinite;
}
.signin-hero::after {
  width: 6px;
  height: 6px;
  top: 50px;
  right: 70px;
  background: #22d3ee;
  animation: signin-float 4s ease-in-out infinite 0.5s;
}

.signin-icon-badge {
  width: 64px;
  height: 64px;
  margin: 0 auto 14px;
  border-radius: 18px;
  background: linear-gradient(135deg, var(--signin-brand), var(--signin-brand-2));
  color: #fff;
  display: grid;
  place-items: center;
  box-shadow: 0 14px 30px -8px rgba(109, 40, 217, 0.55);
  position: relative;
  animation: signin-float 4s ease-in-out infinite;
}
.signin-icon-badge::after {
  content: '';
  position: absolute;
  inset: -7px;
  border-radius: 24px;
  border: 2px dashed rgba(139, 92, 246, 0.4);
  animation: signin-spin 18s linear infinite;
}

.signin-modal h2 {
  margin: 0 0 8px;
  font-size: 20px;
  letter-spacing: -0.02em;
  font-weight: 700;
  color: var(--signin-ink);
}
.signin-modal .signin-sub {
  color: var(--signin-muted);
  font-size: 13.5px;
  line-height: 1.55;
  max-width: 360px;
  margin: 0 auto;
}

.signin-perks {
  padding: 16px 32px 4px;
  display: grid;
  gap: 8px;
}
.signin-perk {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  background: var(--signin-brand-soft);
  border: 1px solid #ede9fe;
  border-radius: 12px;
  font-size: 14px;
  transition: transform 0.2s ease, background 0.2s ease;
  color: var(--signin-ink);
}
.signin-perk:hover {
  transform: translateX(2px);
  background: #f3efff;
}
.signin-perk .signin-check {
  width: 26px;
  height: 26px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--signin-brand), var(--signin-brand-2));
  color: #fff;
  display: grid;
  place-items: center;
  flex-shrink: 0;
  box-shadow: 0 4px 10px -3px rgba(109, 40, 217, 0.5);
}
.signin-perk b {
  font-weight: 600;
}
.signin-perk small {
  color: var(--signin-muted);
  display: block;
  font-size: 12.5px;
  margin-top: 1px;
}

.signin-actions {
  padding: 14px 32px 22px;
  display: grid;
  gap: 10px;
}
.signin-btn {
  height: 44px;
  border-radius: 12px;
  border: none;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: inherit;
  transition: transform 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
  width: 100%;
  padding: 0 14px;
}
/* Anchor-tag button states — pin the colors so the app's global a:hover
   styles don't bleed through and turn link text blue/purple. */
.signin-btn,
.signin-btn:link,
.signin-btn:visited,
.signin-btn:hover,
.signin-btn:active,
.signin-btn:focus {
  text-decoration: none;
}
.signin-btn-primary,
.signin-btn-primary:link,
.signin-btn-primary:visited,
.signin-btn-primary:hover,
.signin-btn-primary:active,
.signin-btn-primary:focus {
  background: linear-gradient(135deg, var(--signin-brand), var(--signin-brand-2));
  color: #fff !important;
  box-shadow: 0 10px 22px -8px rgba(109, 40, 217, 0.6);
}
.signin-btn-primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 26px -8px rgba(109, 40, 217, 0.7);
  filter: brightness(1.04);
}

.signin-btn-secondary,
.signin-btn-secondary:link,
.signin-btn-secondary:visited,
.signin-btn-secondary:active,
.signin-btn-secondary:focus {
  background: #fff;
  color: var(--signin-ink) !important;
  border: 1px solid var(--signin-border);
}
.signin-btn-secondary:hover {
  background: var(--signin-bg);
  color: var(--signin-ink) !important;
}

.signin-btn-ghost {
  background: transparent;
  color: var(--signin-muted) !important;
  height: 32px;
  font-weight: 500;
}
.signin-btn-ghost:hover {
  color: var(--signin-ink) !important;
}

.signin-divider {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--signin-muted);
  font-size: 12px;
  margin: 4px 0;
}
.signin-divider::before,
.signin-divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--signin-border);
}

.signin-trust {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  color: var(--signin-muted);
  font-size: 12px;
  margin-top: 4px;
}
.signin-trust svg {
  color: var(--signin-success);
}

@keyframes signin-fade {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes signin-pop {
  from { transform: translateY(14px) scale(0.96); opacity: 0; }
  to   { transform: none; opacity: 1; }
}
@keyframes signin-spin {
  to { transform: rotate(360deg); }
}
@keyframes signin-float {
  0%, 100% { transform: translateY(0); }
  50%      { transform: translateY(-4px); }
}