:root {
    --bg-dark: #ECEFF4;
    --bg-secondary: #1b263b;
    --accent: #415a77;
    --text-light: #e0e1dd;
    --text-muted: #1d1d1d;
  }
  * { box-sizing: border-box; margin:0; padding:0; }
  body {
    font-family: 'Segoe UI', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-light);
  }
  p {
      font-size: clamp(
          0.1rem,              /* tamaño mínimo (16px) */
          0.3rem + 1.2vw,      /* fórmula intermedia */
          1.25rem            /* tamaño máximo (20px) */
      );
  }

  h1 {
      font-size: clamp(
          0.1rem,              /* tamaño mínimo (16px) */
          0.5rem + 1vw,      /* fórmula intermedia */
          2.5rem            /* tamaño máximo (20px) */
      );
  }
  header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: clamp(
              0.2rem,              /* tamaño mínimo (16px) */
              0.1rem + 1vw,      /* fórmula intermedia */
              0.8rem            /* tamaño máximo (20px) */
          );
    background-color: var(--bg-secondary);
    position: sticky;
    top: 0;
    z-index: 99;
  }
  header img {
    height: clamp(
        0.5rem,              /* tamaño mínimo (16px) */
        1.5rem + 2.5vw,      /* fórmula intermedia */
        4rem            /* tamaño máximo (20px) */
    );
    filter:
    drop-shadow(0 2px 1px rgba(255, 255, 255, 0.658))
    drop-shadow(0 -2px 1px rgba(255, 255, 255, 0.726))
    drop-shadow(0 0px 20px rgba(255, 255, 255, 0.788));
  }
  .hamburger {
    font-size: 1.5rem;
    cursor: pointer;
  }
  .search-container {
    position: relative;
  }
  .search-input {
    width: 0;
    padding: 0;
    border: none;
    outline: none;
    background-color: var(--bg-dark);
    color: var(--text-light);
    transition: width 0.3s ease, padding 0.3s ease;
  }
  .search-input.open {
    width: 20%;
    padding: 0.3rem;
    border: 1px solid var(--accent);
    border-radius: 0.3rem;
  }
  nav {
    position: fixed;
    top: 0;
    left: -250px;
    width: 250px;
    height: 100%;
    background-color: var(--bg-secondary);
    transition: left 0.3s ease;
    padding-top: 4rem;
    z-index: 10;
  }
  nav.open {
    left: 0;
  }
  nav ul {
    list-style: none;
  }
  nav a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-light);
    text-decoration: none;
    transition: background 0.2s;
  }
  nav a:hover {
    background-color: var(--accent);
  }
  main {
    margin-left: 0;
    padding: 2rem;
    transition: margin-left 0.3s ease;
  }
  main.shift {
    margin-left: 250px;
  }

  .hamburger-button {
      width: clamp(1px, 0.5rem + 1.2vw, 30px); height: clamp(2px, 0.5rem + 1vw, 24px); display: flex; flex-direction: column; justify-content: space-between;
      background: none; border: none; cursor: pointer; padding: 0;
      z-index: 10;
    }
    .hamburger-button span {
      display: block; height: clamp(1px, 1px + 0.4vw, 4px); background: var(--text-light);
      border-radius: 2px; transition: transform 0.3s ease, opacity 0.3s ease; position: relative;
    }
    .hamburger-button.open span:nth-child(1) {
      transform: translateY(calc(51%)) rotate(-50deg);
    }
    .hamburger-button.open span:nth-child(2) {
      opacity: 0;
    }
    .hamburger-button.open span:nth-child(3) {
      transform: translateY(calc(51%)) rotate(50deg);
    }