:root {
  /* Material 3 Color Tokens — generated from brand seed #04CA9B (IDK Can You? teal) */
  --md-sys-color-primary: #006d52;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #82f8c9;
  --md-sys-color-on-primary-container: #002116;
  --md-sys-color-secondary: #4a6358;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #cce9d9;
  --md-sys-color-on-secondary-container: #072017;
  --md-sys-color-tertiary: #3e6374;
  --md-sys-color-on-tertiary: #ffffff;
  --md-sys-color-tertiary-container: #c1e8fb;
  --md-sys-color-on-tertiary-container: #001f29;
  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;
  --md-sys-color-background: #f6fbf6;
  --md-sys-color-on-background: #181d1a;
  --md-sys-color-surface: #f6fbf6;
  --md-sys-color-on-surface: #181d1a;
  --md-sys-color-surface-variant: #dbe5de;
  --md-sys-color-on-surface-variant: #404944;
  --md-sys-color-outline: #707974;
  --md-sys-color-outline-variant: #bfc9c2;
  --md-sys-color-shadow: #000000;
  --md-sys-color-surface-tint: #006d52;
  --md-sys-color-inverse-surface: #2d322f;
  --md-sys-color-inverse-on-surface: #eef1ed;
  --md-sys-color-inverse-primary: #65dbae;
  --md-sys-color-scrim: #000000;
  --md-sys-color-surface-container-highest: #e1e3df;
  --md-sys-color-surface-container-high: #e7e9e5;
  --md-sys-color-surface-container: #edefeb;
  --md-sys-color-surface-container-low: #f3f5f1;
  --md-sys-color-surface-container-lowest: #ffffff;

  /* Typography */
  --md-sys-typescale-display-large: 400 57px/64px 'Outfit', sans-serif;
  --md-sys-typescale-display-medium: 400 45px/52px 'Outfit', sans-serif;
  --md-sys-typescale-display-small: 400 36px/44px 'Outfit', sans-serif;
  --md-sys-typescale-headline-large: 400 32px/40px 'Outfit', sans-serif;
  --md-sys-typescale-headline-medium: 400 28px/36px 'Outfit', sans-serif;
  --md-sys-typescale-headline-small: 400 24px/32px 'Outfit', sans-serif;
  --md-sys-typescale-title-large: 400 22px/28px 'Outfit', sans-serif;
  --md-sys-typescale-title-medium: 500 16px/24px 'Outfit', sans-serif;
  --md-sys-typescale-title-small: 500 14px/20px 'Outfit', sans-serif;
  --md-sys-typescale-label-large: 500 14px/20px 'Outfit', sans-serif;
  --md-sys-typescale-label-medium: 500 12px/16px 'Outfit', sans-serif;
  --md-sys-typescale-label-small: 500 11px/16px 'Outfit', sans-serif;
  --md-sys-typescale-body-large: 400 16px/24px 'Outfit', sans-serif;
  --md-sys-typescale-body-medium: 400 14px/20px 'Outfit', sans-serif;
  --md-sys-typescale-body-small: 400 12px/16px 'Outfit', sans-serif;

  /* Expressive Shapes */
  --shape-corner-extra-small: 4px;
  --shape-corner-small: 8px;
  --shape-corner-medium: 12px;
  --shape-corner-large: 16px;
  --shape-corner-extra-large: 28px;
  --shape-corner-full: 999px;
}

body {
  margin: 0;
  padding: 0;
  font-family: 'Outfit', sans-serif;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

header {
  padding: 16px;
  text-align: center;
}

main {
  flex: 1;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 24px 16px;
}

/* Card Surface */
.card-surface {
  background-color: var(--md-sys-color-surface-container-low);
  border-radius: var(--shape-corner-extra-large);
  padding: 24px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.3), 0 1px 3px 1px rgba(0, 0, 0, 0.15); /* Elevation 1 */
  width: 100%;
  max-width: 400px; /* Default for cards */
  box-sizing: border-box;
}

/* Typography Helpers */
.display-medium { font: var(--md-sys-typescale-display-medium); }
.headline-small { font: var(--md-sys-typescale-headline-small); }
.body-large { font: var(--md-sys-typescale-body-large); }
.body-medium { font: var(--md-sys-typescale-body-medium); }
.label-large { font: var(--md-sys-typescale-label-large); }

.text-on-surface-variant { color: var(--md-sys-color-on-surface-variant); }
.text-primary { color: var(--md-sys-color-primary); }

/* Buttons */
.primary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  border: none;
  border-radius: var(--shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  cursor: pointer;
  transition: box-shadow 0.2s ease, transform 0.1s ease;
}

.primary-btn:hover {
  box-shadow: 0 2px 6px 2px rgba(0, 0, 0, 0.15); /* Elevation 2 */
}

.primary-btn:active {
  transform: scale(0.98);
}

.secondary-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 10px 24px;
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
  border-radius: var(--shape-corner-full);
  font: var(--md-sys-typescale-label-large);
  text-decoration: none;
  cursor: pointer;
}

/* Google Sign In Button Specifics */
.google-btn {
  background-color: #ffffff;
  color: #1f1f1f;
  border: 1px solid #747775;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}
.google-btn:hover {
  background-color: #f0f4f9; /* Google's hover state */
  box-shadow: none;
  border-color: #1f1f1f;
}

/* Layout Utilities */
.gap-16 { gap: 16px; }
.mt-16 { margin-top: 16px; }
.mt-32 { margin-top: 32px; }
.mb-24 { margin-bottom: 24px; }
.mb-40 { margin-bottom: 40px; }
.text-center { text-align: center; }
.w-100 { width: 100%; }
.flex-col { display: flex; flex-direction: column; }

/* Admin Section specific (restoring legacy class support) */
.admin h2 {
    font: var(--md-sys-typescale-headline-medium);
    margin-top: 0;
    margin-bottom: 16px;
}