@layer base, components;

@layer base {
  :root {
    --color-primary: oklch(65% 0.25 260);
    --color-secondary: oklch(75% 0.2 280);
    --color-background: oklch(98% 0.02 260);
    --color-text: oklch(20% 0.02 260);
    --container-bg: oklch(100% 0 0);
    --shadow-color: oklch(20% 0.02 260 / 0.3);
    --font-sans: "system-ui", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  }

  [data-theme="dark"] {
    --color-primary: oklch(70% 0.2 260);
    --color-secondary: oklch(80% 0.15 280);
    --color-background: oklch(20% 0.02 260);
    --color-text: oklch(95% 0.01 260);
    --container-bg: oklch(25% 0.03 260);
    --shadow-color: oklch(0% 0 0 / 0.5);
  }

  body {
    font-family: var(--font-sans);
    background-color: var(--color-background);
    color: var(--color-text);
    display: grid;
    place-content: center;
    min-block-size: 100vh;
    margin: 0;
    transition: background-color 0.3s ease, color 0.3s ease;
    /* Subtle noise texture */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 100 100'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.02'/%3E%3C/svg%3E");
  }

  h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    text-align: center;
    text-wrap: balance;
    color: var(--color-primary);
    margin-block-end: 2rem;
  }
}

@layer components {
  .app-container {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    padding: 2rem;
    border-radius: 1.5rem;
    background: var(--container-bg);
    box-shadow:
      0 3.8px 2.2px var(--shadow-color, 0.1),
      0 9.2px 5.3px var(--shadow-color, 0.07),
      0 17.3px 10px var(--shadow-color, 0.06),
      0 30.8px 17.9px var(--shadow-color, 0.05),
      0 57.6px 33.4px var(--shadow-color, 0.04),
      0 138px 80px var(--shadow-color, 0.03);
    transition: background-color 0.3s ease, box-shadow 0.3s ease;
  }

  #theme-toggle {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    color: var(--color-text);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.2s;
  }

  #theme-toggle:hover {
    background-color: oklch(0% 0 0 / 0.05);
  }

  [data-theme="dark"] #theme-toggle:hover {
    background-color: oklch(100% 0 0 / 0.1);
  }

  #theme-toggle .sun-icon {
    display: none;
  }

  #theme-toggle .moon-icon {
    display: block;
  }

  [data-theme="dark"] #theme-toggle .sun-icon {
    display: block;
  }

  [data-theme="dark"] #theme-toggle .moon-icon {
    display: none;
  }

  #generate-btn {
    font-size: 1.25rem;
    font-weight: 600;
    padding: 1rem 2rem;
    border: none;
    border-radius: 0.75rem;
    cursor: pointer;
    color: white;
    background-image: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    box-shadow: 0 4px 15px oklch(65% 0.25 260 / 0.4);
    transition: all 0.2s ease-in-out;
  }

  #generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px oklch(65% 0.25 260 / 0.5);
  }

  #generate-btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 10px oklch(65% 0.25 260 / 0.3);
  }

  lotto-numbers {
    display: block;
    min-height: 5rem;
  }
}