/* style.css */

:root {
    color-scheme: light dark;
    --bg-light: #f9fbfc;
    --bg-dark: #111827;
    --text-light: #1a1a1a;
    --text-dark: #f3f4f6;
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --input-bg-light: #ffffff;
    --input-bg-dark: #1f2937;
    --input-border-light: #ccc;
    --input-border-dark: #4b5563;
    --label-color-light: #555;
    --label-color-dark: #d1d5db;
    --transition-fast: 0.3s ease;
    --transition-medium: 0.4s ease;
    --radius: 8px;
  }
  
  *, *::before, *::after {
    box-sizing: border-box;
  }
  
  html {
    margin: 0;
    padding: 0;
    scroll-behavior: smooth;
  }
  
  body {
    font-family: system-ui, sans-serif;
    line-height: 1.6;
    margin: 0;
    padding: 0;
    overflow-x: hidden;
    transition: background-color var(--transition-medium), color var(--transition-medium);
  }
  
  html[data-theme="light"] {
    background-color: var(--bg-light);
    color: var(--text-light);
  }
  
  html[data-theme="dark"] {
    background-color: var(--bg-dark);
    color: var(--text-dark);
  }
  
  header {
    background-color: #1f2937;
    color: white;
    padding: 1rem;
    position: sticky;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    transition: all var(--transition-medium);
    width: 100%;
  }
  
  .header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 700px;
    margin: auto;
  }
  
  header h1 {
    margin: 0;
    font-size: 1.25rem;
  }
  
  header h1 a {
    color: white;
    text-decoration: none;
    transition: color var(--transition-fast);
  }
  
  header h1 a:hover,
  header h1 a:focus {
    color: var(--primary);
    text-decoration: underline;
  }
  
  header button {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    color: white;
  }
  
  main {
    padding: 0 1rem;
    max-width: 700px;
    margin: auto;
  }
  
  section {
    margin-bottom: 2rem;
  }
  
  h1, h2 {
    font-weight: 600;
    margin-bottom: 1rem;
  }
  
  a {
    color: var(--primary);
  }
  
  a:focus, button:focus, input:focus, textarea:focus {
    outline: 3px solid var(--primary);
    outline-offset: 2px;
  }
  
  form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    max-width: 100%;
  }
  
  .form-group {
    position: relative;
    max-width: 100%;
  }
  
  input, textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 0.75rem;
    font-size: 1rem;
    border: 1px solid var(--input-border-light);
    border-radius: var(--radius);
    background-color: var(--input-bg-light);
    color: inherit;
    transition: all var(--transition-fast);
    scroll-margin-top: 6rem;
  }
  
  html[data-theme="dark"] input,
  html[data-theme="dark"] textarea {
    background-color: var(--input-bg-dark);
    border-color: var(--input-border-dark);
  }
  
  label {
    position: absolute;
    top: 0.55rem;
    left: 0.75rem;
    padding: 0 0.25rem;
    background-color: var(--input-bg-light);
    color: var(--label-color-light);
    font-size: 1rem;
    pointer-events: none;
    transition: all var(--transition-fast);
  }
  
  html[data-theme="dark"] label {
    background-color: var(--input-bg-dark);
    color: var(--label-color-dark);
  }
  
  input:focus + label,
  input:not(:placeholder-shown) + label,
  textarea:focus + label,
  textarea:not(:placeholder-shown) + label {
    top: -1.3rem;
    left: 0;
    font-size: 0.8rem;
    border: 1px solid var(--input-border-light);
    border-bottom: 1px solid var(--input-bg-light);
    border-radius: var(--radius) var(--radius) 0 0;
    background-color: var(--input-bg-light);
  }
  
  html[data-theme="dark"] input:focus + label,
  html[data-theme="dark"] input:not(:placeholder-shown) + label,
  html[data-theme="dark"] textarea:focus + label,
  html[data-theme="dark"] textarea:not(:placeholder-shown) + label {
    border-color: var(--input-border-dark);
    border-bottom: 1px solid var(--input-bg-dark);
    background-color: var(--input-bg-dark);
  }
  
  input:focus,
  input:not(:placeholder-shown),
  textarea:focus,
  textarea:not(:placeholder-shown) {
    border-top-left-radius: 0;
  }
  
  button[type="submit"] {
    background-color: var(--primary);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background-color var(--transition-fast);
    align-self: flex-end;
  }
  
  button[type="submit"]:hover {
    background-color: var(--primary-dark);
  }
  
  footer {
    background-color: #e5e7eb;
    text-align: center;
    padding: 1rem;
    font-size: 0.875rem;
    margin-top: 2rem;
    width: 100%;
  }
  
  html[data-theme="dark"] footer {
    background-color: #1f2937;
    color: #d1d5db;
  }
  
  @media (max-width: 600px) {
    header h1 {
      font-size: 1rem;
    }
  
    input,
    textarea,
    button {
      font-size: 0.95rem;
    }
  
    .header-inner {
      padding: 0 1rem;
    }
  
    form {
        gap: 0.5rem;
      }
    
      .form-group {
        margin-bottom: 2.25rem;
      }
  
    button[type="submit"] {
      align-self: stretch;
    }
  }
  
  @media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
      transition: none !important;
      animation: none !important;
      scroll-behavior: auto !important;
    }
  }