/* ==========================
   ESTILO TIPO VERCEL
========================== */

:root {
  --bg: #ffffff;
  --surface: #fafafa;
  --card: #ffffff;
  --text: #111111;
  --text-light: #666666;
  --border: #e5e7eb;
  --accent: #000000;
  --radius: 18px;
  --shadow: 0 10px 40px rgba(0, 0, 0, 0.06);
  --transition: 0.25s ease;
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 15rem;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family:
    Inter,
    ui-sans-serif,
    system-ui,
    -apple-system,
    BlinkMacSystemFont,
    'Segoe UI',
    sans-serif;
  line-height: 1.8;
}

/* ==========================
      HEADER
========================== */

header {
  position: sticky;
  top: 0;
  z-index: 1000;

  background: rgba(255, 255, 255, 0.9);
  backdrop-filter: blur(15px);

  border-bottom: 1px solid var(--border);

  padding: 22px 7%;
  text-align: center;
}

header h1 {
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: -2px;
}

header > p {
  color: var(--text-light);
  margin: 10px auto 0;
  max-width: 700px;
}

/* ==========================
      NAV
========================== */

nav {
  margin-top: 25px;
}

nav ul {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;

  list-style: none;
}

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

  padding: 12px 18px;

  border: 1px solid var(--border);

  border-radius: 999px;

  transition: var(--transition);
}

nav a:hover {
  background: #000;
  color: #fff;
  transform: translateY(-2px);
}

/* ==========================
      MAIN
========================== */

main {
  width: min(1150px, 90%);
  margin: auto;

  padding: 70px 0 120px;

  display: grid;
  gap: 55px;
}

/* ==========================
      SECCIONES
========================== */

section {
  background: var(--card);

  border: 1px solid var(--border);

  border-radius: var(--radius);

  padding: 45px;

  box-shadow: var(--shadow);

  transition: var(--transition);
}

section:hover {
  transform: translateY(-6px);
}

section h2 {
  font-size: 2rem;
  margin-bottom: 30px;
  letter-spacing: -1px;
}

section h3 {
  margin: 35px 0 15px;
  font-size: 1.3rem;
}

article {
  display: grid;
  gap: 20px;
}

p {
  color: #444;
}

strong {
  color: #111;
}

/* ==========================
      LISTAS
========================== */

ul,
ol {
  margin-left: 30px;
}

li {
  margin: 10px 0;
}

/* ==========================
      BLOQUES
========================== */

aside {
  margin-top: 25px;

  background: #f8f8f8;

  border-left: 4px solid black;

  padding: 20px;

  border-radius: 12px;
}

blockquote {
  margin: 20px 0;

  padding: 25px;

  background: #fafafa;

  border-left: 5px solid black;

  font-style: italic;
}

/* ==========================
      TABLA
========================== */

table {
  width: 100%;
  border-collapse: collapse;
  overflow: hidden;

  border-radius: 15px;
}

caption {
  font-size: 1.3rem;
  margin-bottom: 20px;
  font-weight: 700;
}

thead {
  background: black;
  color: white;
}

th,
td {
  padding: 18px;
  border: 1px solid var(--border);
  text-align: left;
}

tbody tr:nth-child(even) {
  background: #fafafa;
}

tbody tr:hover {
  background: #f2f2f2;
}

/* ==========================
      IMAGEN
========================== */

img {
  width: 100%;
  max-width: 700px;

  display: block;

  margin: 40px auto;

  border-radius: 18px;

  box-shadow: var(--shadow);
}

/* ==========================
      BOTONES
========================== */

button {
  cursor: pointer;

  border: none;

  padding: 16px 28px;

  border-radius: 12px;

  background: black;

  color: white;

  font-size: 1rem;

  transition: var(--transition);
}

button:hover {
  transform: translateY(-3px);

  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

/* ==========================
      DIALOG
========================== */

dialog {
  position: fixed;

  top: 50%;
  left: 50%;

  transform: translate(-50%, -50%);

  width: min(600px, 90vw);

  max-height: 85vh;
  overflow: auto;

  margin: 0;

  padding: 35px;

  border: none;
  border-radius: 20px;

  background: #fff;

  box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3);
}

dialog::backdrop {
  background: rgba(0, 0, 0, 0.45);
  backdrop-filter: blur(4px);
}

/* ==========================
      FORMULARIO
========================== */

fieldset {
  border: 1px solid var(--border);

  border-radius: 18px;

  padding: 30px;
}

legend {
  font-weight: 700;
  padding: 0 10px;
}

select {
  margin-top: 12px;

  padding: 14px;

  border-radius: 10px;

  border: 1px solid var(--border);

  width: 320px;

  max-width: 100%;
}

input[type='checkbox'] {
  transform: scale(1.2);
}

/* ==========================
      DETAILS
========================== */

details {
  border: 1px solid var(--border);

  border-radius: 16px;

  padding: 20px;
}

summary {
  cursor: pointer;

  font-weight: 700;

  font-size: 1.05rem;
}

audio,
video {
  width: 100%;

  margin-top: 20px;

  border-radius: 12px;
}

/* ==========================
      FOOTER
========================== */

footer {
  margin-top: 80px;

  padding: 60px 7%;

  background: #fafafa;

  border-top: 1px solid var(--border);

  display: grid;

  gap: 18px;

  color: #666;
}

footer small {
  color: #999;
}

/* ==========================
      LINKS
========================== */

a {
  color: inherit;
}

/* ===========================================
   RESPONSIVE 
=========================================== */

/* Tablets grandes */
@media (max-width: 1024px) {
  main {
    width: 94%;
    padding: 50px 0 80px;
  }

  header {
    padding: 18px 4%;
  }

  section {
    padding: 35px;
  }

  header h1 {
    font-size: 2.5rem;
  }
}

/* Tablets */
@media (max-width: 768px) {
  html {
    font-size: 15px;
  }

  header {
    position: relative;
    padding: 20px;
  }

  header h1 {
    font-size: 2rem;
    text-align: center;
  }

  header > p {
    text-align: center;
    margin: auto;
    margin-top: 15px;
  }

  nav {
    margin-top: 25px;
  }

  nav ul {
    display: flex;

    align-items: stretch;

    gap: 5px;
  }

  nav li {
    width: fit-content;
    margin:0;
  }

  nav a {
    display: block;
    padding: 6px 10px;
    width: 100%;
  
    text-align: center;
  }

  main {
    width: 95%;

    gap: 35px;

    padding: 35px 0 70px;
  }

  section {
    padding: 30px 24px;
  }

  section h2 {
    font-size: 1.7rem;
  }

  section h3 {
    font-size: 1.2rem;
  }

  table {
    display: block;

    overflow-x: auto;

    white-space: nowrap;
  }

  img {
    width: 100%;

    height: auto;
  }

  audio,
  video {
    width: 100%;
    height: auto;
  }

  dialog {
    width: 92%;

    max-width: none;
  }
}

/* Celulares */
@media (max-width: 480px) {
  html {
    font-size: 14px;
  }

  body {
    line-height: 1.7;
  }

  header {
    padding: 18px;
  }

  header h1 {
    font-size: 1.6rem;

    letter-spacing: -1px;
  }

  section {
    padding: 22px 18px;

    border-radius: 14px;
  }

  section h2 {
    font-size: 1.45rem;
  }

  section h3 {
    font-size: 1.1rem;
  }

  p,
  li {
    font-size: 0.95rem;
  }

  button {
    width: 100%;

    padding: 16px;
  }

  select {
    width: 100%;
  }

  fieldset {
    padding: 20px;
  }

  aside,
  blockquote {
    padding: 16px;
  }

  th,
  td {
    padding: 12px;
  }
}

/* Pantallas muy grandes */
@media (min-width: 1600px) {
  main {
    width: 1250px;
  }

  header {
    padding-left: 8%;
    padding-right: 8%;
  }
}