/* --- Minimal CSS Reset --- */
*,
::before,
::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  -webkit-text-size-adjust: 100%;
  -webkit-tap-highlight-color: transparent;
}

h1, h2, h3, h4, h5, h6 {
  font-size: inherit;
  font-weight: inherit;
}

/* --- M3 Style Definitions --- */
:root {
  --md-sys-color-primary: #6750A4;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #EADDFF;
  --md-sys-color-on-primary-container: #21005D;
  --md-sys-color-outline: #79747E;
  --md-sys-color-on-surface: #1D1B20;
  --md-sys-color-on-surface-variant: #49454F;
  --md-sys-color-surface: #FEF7FF;
  --md-sys-color-surface-container: #F3EDF7;
  --md-sys-state-hover-opacity: 0.08;
  --md-sys-state-focus-opacity: 0.12;
  --md-sys-state-pressed-opacity: 0.12;
}
body {
  font-family: 'Roboto', sans-serif;
  background-color: var(--md-sys-color-surface);
  display: flex;
  justify-content: center;
  align-items: center;
  min-height: 100vh;
  margin: 0;
}
.login-card {
  background-color: var(--md-sys-color-surface-container);
  border-radius: 12px;
  padding: 24px;
  width: 100%;
  max-width: 360px;
  box-shadow: 0px 1px 3px 1px rgba(0, 0, 0, 0.15), 0px 1px 2px 0px rgba(0, 0, 0, 0.3);
}
.headline {
  color: var(--md-sys-color-on-surface);
  font-size: 24px;
  line-height: 32px;
  font-weight: 400;
  margin-bottom: 32px;
  text-align: center;
}
.text-field {
  position: relative;
  margin-bottom: 24px;
}
.text-field input {
  width: 100%;
  height: 56px;
  padding: 0 16px;
  font-size: 16px;
  color: var(--md-sys-color-on-surface);
  background: transparent;
  border: 1px solid var(--md-sys-color-outline);
  border-radius: 4px;
  outline: none;
  box-sizing: border-box;
  transition: border-color 0.2s, border-width 0.1s;
  caret-color: var(--md-sys-color-primary);
}
.text-field input:focus {
  border: 2px solid var(--md-sys-color-primary);
  padding-left: 15px;
  padding-right: 15px;
}
.text-field input:-webkit-autofill, .text-field input:-webkit-autofill:hover, .text-field input:-webkit-autofill:focus, .text-field input:-webkit-autofill:active {
  -webkit-box-shadow: 0 0 0 30px var(--md-sys-color-surface-container) inset !important;
  -webkit-text-fill-color: var(--md-sys-color-on-surface) !important;
  transition: background-color 5000s ease-in-out 0s;
}
.text-field input.error {
  border-color: #B3261E;
}
.text-field label {
  position: absolute;
  left: 16px;
  top: 50%;
  transform: translateY(-50%);
  background-color: var(--md-sys-color-surface-container);
  padding: 0 4px;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 16px;
  pointer-events: none;
  transition: top 0.2s, font-size 0.2s, color 0.2s, transform 0.2s;
}
.text-field input:focus ~ label, .text-field input:not(:placeholder-shown) ~ label {
  top: 0;
  font-size: 12px;
  color: var(--md-sys-color-primary);
  margin-left: -4px;
}
.text-field input:not(:placeholder-shown):not(:focus) ~ label {
  color: var(--md-sys-color-on-surface-variant);
}
.m3-button {
  position: relative;
  overflow: hidden;
  width: 100%;
  height: 40px;
  border-radius: 20px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  font-family: 'Roboto', sans-serif;
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.1px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0px 1px 2px rgba(0,0,0,0.3), 0px 1px 3px 1px rgba(0,0,0,0.15);
  transition: box-shadow 0.2s, background-color 0.2s;
}
.m3-button:hover {
  box-shadow: 0px 1px 2px rgba(0,0,0,0.3), 0px 2px 6px 2px rgba(0,0,0,0.15);
}
.m3-button::after {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background-color: var(--md-sys-color-on-primary);
  opacity: 0;
  transition: opacity 0.2s;
}
.m3-button:hover::after {
  opacity: var(--md-sys-state-hover-opacity);
}
.m3-button:active::after {
  opacity: var(--md-sys-state-pressed-opacity);
}
.ripple {
  position: absolute;
  border-radius: 50%;
  transform: scale(0);
  animation: ripple 600ms linear;
  background-color: rgba(255, 255, 255, 0.3);
  pointer-events: none;
}
@keyframes ripple {
  to {
    transform: scale(4);
    opacity: 0;
  }
}