:root {
  --bg: #f8f9fa;
  --card: #ffffff;
  --fg: #202124;
  --fg-secondary: #5f6368;
  --border: #dadce0;
  --primary: #1a73e8;
  --primary-hover: #1967d2;
  --primary-active: #185abc;
  --font-sans: 'Google Sans', Roboto, 'Helvetica Neue', Arial, sans-serif;
  --elev-1: 0 1px 2px rgba(60, 64, 67, 0.30), 0 1px 3px 1px rgba(60, 64, 67, 0.15);
  --elev-2: 0 1px 2px rgba(60, 64, 67, 0.30), 0 2px 6px 2px rgba(60, 64, 67, 0.15);
}

* { box-sizing: border-box; }

html, body { height: 100%; }

body.login-page {
  margin: 0;
  background: var(--bg);
  color: var(--fg);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  display: grid;
  place-items: center;
  padding: 24px;
  background-image:
    radial-gradient(60vmax 60vmax at 50% 30%, #ffffff 0%, var(--bg) 70%);
}

.login-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: 28px 28px;
  width: min(360px, 100%);
  box-shadow: var(--elev-2);
}

#login-form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

#login-form input[type="password"] {
  font-family: var(--font-sans);
  font-size: 16px;
  font-weight: 400;
  padding: 14px 16px;
  border-radius: 8px;
  border: 1px solid var(--border);
  background: #fff;
  color: var(--fg);
  outline: none;
  transition: border-color 160ms ease, box-shadow 160ms ease;
  text-align: center;
  letter-spacing: 0.02em;
}

#login-form input[type="password"]::placeholder {
  color: var(--fg-secondary);
  opacity: 1;
  letter-spacing: 0;
  font-weight: 400;
}
#login-form input[type="password"]::-webkit-input-placeholder {
  color: var(--fg-secondary);
  opacity: 1;
}
#login-form input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px rgba(26, 115, 232, 0.18);
}
#login-form input:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

#login-form button {
  font-family: var(--font-sans);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 12px 22px;
  border-radius: 999px;
  border: 1px solid var(--primary);
  background: var(--primary);
  color: #fff;
  cursor: pointer;
  transition: background-color 160ms ease,
              border-color 160ms ease,
              box-shadow 160ms ease,
              transform 100ms ease;
  box-shadow: var(--elev-1);
}
#login-form button:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  box-shadow: var(--elev-2);
}
#login-form button:active {
  background: var(--primary-active);
  border-color: var(--primary-active);
  transform: scale(0.99);
}
#login-form button:focus-visible {
  outline: none;
  box-shadow: 0 0 0 2px #fff, 0 0 0 4px var(--primary);
}
#login-form button:disabled {
  opacity: 0.55;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.shake {
  animation: shake 360ms cubic-bezier(.36,.07,.19,.97) both;
}
@keyframes shake {
  10%, 90% { transform: translateX(-1px); }
  20%, 80% { transform: translateX(2px); }
  30%, 50%, 70% { transform: translateX(-5px); }
  40%, 60% { transform: translateX(5px); }
}