:root {
      --bg: #f5f7fb;
      --bg-card: #ffffff;
      --text: #222222;
      --muted: #5f6977;
      --accent: #2563eb;
      --accent-soft: rgba(37, 99, 235, 0.08);
      --border-soft: #e2e8f0;
      --radius-lg: 16px;
      --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
    }

    * {
      box-sizing: border-box;
    }

    body {
      font-family: "Segoe UI", sans-serif;
      background-color: #f7f9fc;
      margin: 0;
      padding: 24px;
      display: flex;
      flex-direction: column;
      align-items: center;
    }

    a {
      color: var(--accent);
      text-decoration: none;
    }

    a:hover {
      text-decoration: underline;
    }

    /* Layout */

    .page {
      min-height: 100vh;
      display: flex;
      flex-direction: column;
      width: 100%;
    }

    h1 {
      margin: 0;
      font-size: clamp(2rem, 3vw, 2.4rem);
      letter-spacing: -0.03em;
      text-align: center;
      color: #2f6652;
      margin-bottom: 10px;
    }

    h1 i {
      font-style: italic;
      color: var(--accent);
    }

    .layout {
      max-width: 1250px;
      width: 100%;
      margin: 0 auto;
      display: flex;
      flex-direction: column;
      text-align: justify;
      gap: 0.75rem;
    }

    .layout-inner {
      max-width: 850px;
      width: 100%;
      margin: 0 auto;
      display: grid;
      grid-template-columns: minmax(0, 1fr);
      gap: 1.5rem;
    }

    main {
      display: flex;
      flex-direction: column;
      gap: 1.25rem;
    }

    /* Cards i seccions */

    .card {
      background: var(--bg-card);
      border-radius: var(--radius-lg);
      padding: 1.5rem 1.5rem 1.75rem;
      box-shadow: var(--shadow-soft);
      border: 1px solid rgba(148, 163, 184, 0.15);
    }

    .card-header {
      display: flex;
      flex-wrap: wrap;
      align-items: baseline;
      justify-content: space-between;
      gap: 0.5rem;
      margin-bottom: 0.9rem;
      border-bottom: 1px solid rgba(226, 232, 240, 0.9);
      padding-bottom: 0.6rem;
    }

    .card-title {
      margin: 0;
      font-size: 1.25rem;
      letter-spacing: -0.02em;
    }

    .card-title i {
      color: var(--accent);
    }

    .card-tag {
      font-size: 0.8rem;
      padding: 0.2rem 0.6rem;
      border-radius: 999px;
      background: var(--accent-soft);
      color: var(--accent);
      white-space: nowrap;
    }

    .card img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 1rem auto;
   }

    h3 {
      margin-top: 1.3rem;
      margin-bottom: 0.4rem;
      font-size: 1.05rem;
    }

    p {
      margin: 0 0 0.7rem;
      font-size: 0.97rem;
      color: var(--text);
    }

    ul, ol {
      margin: 0.8rem 1rem 0.8rem 2.2rem;
      padding: 0;
      color: var(--text);
      font-size: 0.95rem;
    }

    li {
      margin-bottom: 0.3rem;
    }

    i {
      font-style: italic;
    }

    .boto {
      background-color: #e6f0fa;
      border: 1px solid #336699;
      color: #336699;
      font-size: 0.95em;
      padding: 8px 14px;
      border-radius: 6px;
      cursor: pointer;
      transition: background-color 0.2s;
    }

    .boto:hover {
      background-color: #d0e7f9;
    }

    /* Galeria de làmines */

    .galeria-lamines {
      display: flex;
      flex-wrap: wrap;
      gap: 10px;
      justify-content: center;
    }

    .lamina-item {
      box-sizing: border-box;
      width: calc(20% - 10px); /* 5 per fila escriptoris grans */
      text-align: center;
    }

    .lamina-item img {
      max-width: 100%;
      height: auto;
      display: block;
      margin: 0 auto;
    }

    /* Responsivitat */

    @media (min-width: 880px) {
      .layout-inner {
        grid-template-columns: minmax(0, 260px) minmax(0, 1fr);
        align-items: flex-start;
      }

      .sidebar {
        border-radius: 999px;
      }
    }

    @media (max-width: 879px) {
      body {
        padding: 16px;
      }

      .layout {
        padding: 0.25rem 0 1.5rem;
      }

      .sidebar {
        position: static;
        border-radius: var(--radius-lg);
        box-shadow: 0 8px 24px rgba(15, 23, 42, 0.06);
        justify-content: flex-start;
        margin-bottom: 0.25rem;
      }
    }

    @media (max-width: 800px) {
      .lamina-item {
        width: calc(33.333% - 10px); /* 3 per fila en pantalles petites */
      }
    }

    @media (max-width: 500px) {
      body {
        padding: 12px;
      }

      .lamina-item {
        width: calc(50% - 10px); /* 2 per fila en ṃbil */
      }
    }