*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 16px; -webkit-font-smoothing: antialiased; }

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  line-height: 1.6;
  min-height: 100vh;
}

a { color: inherit; text-decoration: none; }

button, input, select { font-family: inherit; }

/* OTP digit inputs */
.otp-row {
  display: flex;
  gap: 10px;
  justify-content: center;
  margin: 24px 0;
}

.otp-digit {
  width: 52px;
  height: 60px;
  text-align: center;
  font-size: 1.5rem;
  font-weight: 700;
  border-radius: 10px;
  border: 2px solid var(--border);
  background: var(--input-bg);
  color: var(--text-primary);
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  caret-color: var(--accent);
}

.otp-digit:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-glow, rgba(0,0,0,0.1));
}

.otp-digit.filled { border-color: var(--accent); }

/* Spinner */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* Toast / alert */
.toast {
  padding: 12px 18px;
  border-radius: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 20px;
}

.toast.error { background: rgba(239,68,68,0.12); color: #f87171; border: 1px solid rgba(239,68,68,0.25); }
.toast.success { background: rgba(16,185,129,0.12); color: #34d399; border: 1px solid rgba(16,185,129,0.25); }
.toast.warning { background: rgba(245,158,11,0.12); color: #fbbf24; border: 1px solid rgba(245,158,11,0.25); }

/* Utility */
.hidden { display: none !important; }

@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(16px); }
  to   { opacity: 1; transform: translateY(0); }
}

.fade-in { animation: fadeInUp 0.45s ease both; }

@keyframes pulse-glow {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.6; }
}