:root {
      --bg-gradient: linear-gradient(135deg, #ccfbff 0%, #e7d9ff 50%, #ef96c5 100%);
      --card-bg: #ffffff;
      --card-border: #eaeaea;
      --text-primary: #222222;
      --text-muted: #6b7280;
      --brand: #6a5acd;
      --brand-contrast: #ffffff;
      --accent: #0ea5e9;
      --danger: #d70022;
      --surface: rgba(255,255,255,0.6);
    }
    body {
      font-family: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
      color: var(--text-primary);
      margin: 0;
      padding: 24px;
      min-height: 100vh;
      background: var(--bg-gradient);
      background-size: cover;
      background-attachment: fixed;
    }
    h1 {
      text-align: center;
      margin: 8px 0 32px;
      font-size: clamp(28px, 3.2vw, 44px);
      letter-spacing: 0.04em;
      font-weight: 800;
      line-height: 1.1;
      color: transparent;
      background: linear-gradient(90deg, #111 0%, #6a5acd 40%, #0ea5e9 100%);
      -webkit-background-clip: text;
              background-clip: text;
      text-shadow: 0 1px 0 rgba(255,255,255,0.25);
    }
    .calendar-container {
      display: flex;
      flex-wrap: wrap;
      justify-content: center;
      gap: 22px;
      max-width: 1400px;
      margin: 0 auto;
    }
    .month {
      background: var(--card-bg);
      border: 1px solid var(--card-border);
      border-radius: 14px;
      width: 300px;
      margin-bottom: 20px;
      box-shadow: 0 8px 24px rgba(0,0,0,0.08);
      transition: box-shadow 180ms ease, transform 180ms ease;
      overflow: hidden;
      backdrop-filter: saturate(120%) blur(6px);
    }
    .month:hover {
      box-shadow: 0 14px 40px rgba(0,0,0,0.16);
      transform: translateY(-2px);
    }
    .month-header {
      background: linear-gradient(135deg, rgba(106,90,205,0.9), rgba(14,165,233,0.9));
      color: var(--brand-contrast);
      padding: 14px 12px;
      border-radius: 14px 14px 0 0;
      text-align: center;
      font-size: 1.15rem;
      font-weight: 700;
      letter-spacing: 0.06em;
      text-transform: uppercase;
    }
    table {
      width: 100%;
      border-collapse: collapse;
      margin-bottom: 10px;
      table-layout: fixed;
    }
     table td:hover {
      background: #f4faff;
      cursor: pointer;
      transition: background 0.18s ease;
    }
    
    th, td {
      width: 14.28%;
      text-align: center;
      padding: 8px 0;
      border: 1px solid #f0f0f0;
      position: relative;
    }
  
    th {
      background: #eef5ff;
      font-weight: 700;
      color: #0f172a;
      padding: 10px 0;
    }
    th:first-child {
      color: var(--danger);
    }
    tr:nth-child(odd) td {
      background: #ffffff;
    }
    tr:nth-child(even) td {
      background: #fcfcff;
    }
    .holiday {
      background: #ffe5e5;
      color: var(--danger);
      font-weight: 700;
      border-radius: 999px;
      display: inline-flex;
      align-items: center;
      justify-content: center;
      width: 32px;
      height: 32px;
      line-height: 32px;
      text-decoration: none;
      box-shadow: inset 0 -1px 0 rgba(0,0,0,0.06);
    }
    a.holiday:hover {
      filter: brightness(0.95);
    }
    td > a {
      color: inherit;
      text-decoration: none;
      font-weight: 600;
    }
    td > a:focus-visible,
    .holiday:focus-visible {
      outline: 2px solid var(--accent);
      outline-offset: 2px;
      border-radius: 999px;
    }
    /* Optional helper for a future .today class */
    .today {
      background: #fff7ed !important;
    }
    /* Responsive styles */
    @media (max-width: 1000px) {
      .calendar-container {
        gap: 12px;
      }
      .month {
        width: 45vw;
        min-width: 220px;
      }
    }
    @media (max-width: 700px) {
      .calendar-container {
        flex-direction: column;
        align-items: center;
      }
      .month {
        width: 92vw;
        min-width: 180px;
      }
    }