:root {
  --bg-1: #e0f7fa;
  --bg-2: #eef1ff;
  --card-bg: rgba(255, 255, 255, 0.72);
  --card-border: rgba(255, 255, 255, 0.6);
  --text: #1a1d29;
  --muted: #6b7280;
  --accent: #6366f1;
  --accent-2: #06b6d4;
  --error: #ef4444;
  --shadow: 0 20px 60px -15px rgba(30, 41, 59, 0.25);
}

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

body {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  font-family: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at 20% 20%, var(--bg-1), transparent 50%),
    radial-gradient(circle at 80% 80%, var(--bg-2), transparent 50%),
    linear-gradient(135deg, #f5f7ff 0%, #eef2ff 100%);
}

.card {
  width: 100%;
  max-width: 360px;
  text-align: center;
  padding: 44px 36px;
  border-radius: 24px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation: rise 0.5s ease;
}

@keyframes rise {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 16px;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
}

.icon.success {
  background: linear-gradient(135deg, #10b981, #06b6d4);
}

.icon svg {
  width: 26px;
  height: 26px;
}

h1 {
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
}

.subtitle {
  color: var(--muted);
  font-size: 14px;
  margin-bottom: 28px;
}

.pin-inputs {
  display: flex;
  gap: 12px;
  justify-content: center;
  margin-bottom: 20px;
}

.pin-inputs.shake {
  animation: shake 0.4s;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  20%, 60% { transform: translateX(-8px); }
  40%, 80% { transform: translateX(8px); }
}

.pin-digit {
  width: 52px;
  height: 60px;
  font-family: inherit;
  font-size: 24px;
  font-weight: 700;
  text-align: center;
  color: var(--text);
  background: #fff;
  border: 1.5px solid #d8dce8;
  border-radius: 12px;
  transition: border-color 0.2s, box-shadow 0.2s;
}

.pin-digit:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.15);
}

#loginError {
  height: 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--error);
  opacity: 0;
  transition: opacity 0.2s;
}

#loginError.visible {
  opacity: 1;
}

.now-display {
  font-size: 28px;
  font-weight: 800;
  letter-spacing: -0.02em;
  font-variant-numeric: tabular-nums;
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  background-clip: text;
  -webkit-background-clip: text;
  color: transparent;
}