/* Material Design 3 Variables */
: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-surface: #fef7ff;
  --md-sys-color-on-surface: #1d1b20;
  --md-sys-color-surface-variant: #e7e0ec;
  --md-sys-color-on-surface-variant: #49454f;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;

  /* Custom colors for the button */
  --button-primary: #d32f2f;
  --button-primary-hover: #b71c1c;
  --button-on-primary: #ffffff;

  /* Typography */
  --md-sys-typescale-display-large-font: "Roboto", sans-serif;
  --md-sys-typescale-headline-medium-font: "Roboto", sans-serif;
  --md-sys-typescale-label-large-font: "Roboto", sans-serif;
}

/* Reset and base styles */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--md-sys-typescale-display-large-font);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
}

.container {
  width: 100%;
  max-width: 600px;
  text-align: center;
}

.header {
  margin-bottom: 48px;
}

.title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 400;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 8px;
  letter-spacing: -0.25px;
}

.subtitle {
  font-size: 1.125rem;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 400;
  margin-bottom: 0;
}

.main-content {
  display: flex;
  justify-content: center;
  align-items: center;
}

/* Material Design 3 Button */
.material-button {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 20px 32px;
  min-width: 200px;
  min-height: 80px;
  border: none;
  border-radius: 24px;
  background-color: var(--button-primary);
  color: var(--button-on-primary);
  font-family: var(--md-sys-typescale-label-large-font);
  font-size: 1.25rem;
  font-weight: 500;
  letter-spacing: 0.1px;
  cursor: pointer;
  overflow: hidden;
  transition: all 0.2s cubic-bezier(0.2, 0, 0, 1);
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.3),
    0px 1px 3px 1px rgba(0, 0, 0, 0.15);

  /* Prevent text selection */
  -webkit-user-select: none;
  -moz-user-select: none;
  -ms-user-select: none;
  user-select: none;

  /* Prevent tap highlight on mobile */
  -webkit-tap-highlight-color: transparent;
}

.material-button:hover {
  background-color: var(--button-primary-hover);
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.3),
    0px 2px 6px 2px rgba(0, 0, 0, 0.15);
  transform: translateY(-1px);
}

.material-button:active {
  transform: translateY(0);
  box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.3),
    0px 1px 3px 1px rgba(0, 0, 0, 0.15);
}

.material-button .material-icons {
  font-size: 1.5rem;
}

.button-text {
  font-weight: 500;
}

/* Ripple effect */
.ripple {
  position: absolute;
  border-radius: 50%;
  background-color: rgba(255, 255, 255, 0.3);
  transform: scale(0);
  animation: ripple-animation 0.6s linear;
  pointer-events: none;
}

@keyframes ripple-animation {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* Mobile optimizations */
@media (max-width: 768px) {
  .container {
    padding: 16px;
  }

  .header {
    margin-bottom: 32px;
  }

  .material-button {
    min-width: 180px;
    min-height: 70px;
    padding: 16px 24px;
    font-size: 1.125rem;
  }

  .material-button .material-icons {
    font-size: 1.25rem;
  }
}

/* Touch device optimizations */
@media (hover: none) and (pointer: coarse) {
  .material-button:hover {
    background-color: var(--button-primary);
    transform: none;
    box-shadow: 0px 1px 2px rgba(0, 0, 0, 0.3),
      0px 1px 3px 1px rgba(0, 0, 0, 0.15);
  }

  .material-button:active {
    background-color: var(--button-primary-hover);
    transform: scale(0.98);
  }
}

/* Accessibility improvements */
.material-button:focus-visible {
  outline: 2px solid var(--md-sys-color-primary);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  .material-button {
    transition: none;
  }

  .ripple {
    animation: none;
  }
}