.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
  backdrop-filter: blur(4px);
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  padding: 32px;
  width: 360px;
  max-width: 90vw;
  text-align: center;
  box-shadow: 0 20px 60px rgba(0,0,0,0.5);
}

.modal h2 { font-size: 1.3rem; margin-bottom: 6px; color: var(--accent); }
.modal p { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 20px; line-height: 1.5; }

.modal form { display: flex; flex-direction: column; gap: 12px; }

.modal input {
  width: 100%;
  padding: 10px 14px;
  background: var(--surface2);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-size: 1rem;
  outline: none;
  transition: border-color 0.2s;
}
.modal input:focus { border-color: var(--accent); }

.modal button {
  width: 100%;
  padding: 10px;
  background: var(--accent);
  color: var(--bg);
  border: none;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 700;
  transition: opacity 0.2s;
}
.modal button:hover:not(:disabled) { opacity: 0.85; }
.modal button:disabled { opacity: 0.4; cursor: not-allowed; }

.name-error {
  color: #f87171;
  font-size: 0.8rem;
  background: rgba(248, 113, 113, 0.1);
  border: 1px solid rgba(248, 113, 113, 0.3);
  border-radius: 6px;
  padding: 6px 10px;
  text-align: center;
}

.pin-input {
  letter-spacing: 0.3em !important;
  font-size: 1.5rem !important;
  text-align: center !important;
  font-family: monospace !important;
}

.back-btn {
  background: transparent !important;
  color: var(--text-muted) !important;
  border: 1px solid var(--border) !important;
  font-weight: 400 !important;
  font-size: 0.8rem !important;
}

@media (max-width: 640px) {
  .modal-overlay { align-items: flex-end; justify-content: stretch; padding: 0; }
  .modal {
    width: 100%;
    border-radius: 20px 20px 0 0;
    padding: 12px 24px 32px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 -8px 40px rgba(0,0,0,0.6);
    animation: slideUp 0.3s ease-out;
  }
  @keyframes slideUp { from { transform: translateY(100%); } to { transform: translateY(0); } }
  .drag-handle {
    width: 40px; height: 4px;
    background: var(--border);
    border-radius: 2px;
    margin: 0 auto 14px;
  }
  .modal h2 { font-size: 1.15rem; }
  .modal p { font-size: 0.8rem; margin-bottom: 14px; }
}