/* --- Fonts--- */
@font-face {
  font-family: "Roboto";
  src: url("./assets/fonts/roboto/roboto-variable.ttf") format("truetype");
  font-weight: 100 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: "Roboto Mono";
  src: url("./assets/fonts/roboto-mono/roboto-mono-variable.ttf")
    format("truetype");
  font-weight: 100 700;
  font-style: normal;
  font-display: swap;
}

/* --- Reset--- */
* {
  box-sizing: border-box;
  scroll-behavior: smooth;
  margin: 0;
  padding: 0;
  font: inherit;
}

:root {
  /* Neutrals Colors */
  --neutral-0: #eee;
  --neutral-1: #d5d5d5;
  --neutral-2: #bbb;
  --neutral-3: #a2a2a2;
  --neutral-4: #888;
  --neutral-5: #6f6f6f;
  --neutral-6: #555;
  --neutral-7: #3c3c3c;
  --neutral-8: #222;

  /* Principal Colors */
  --color01-300: #ccd0db;
  --color01-400: #a4a8b3;
  --color01-500: #7c7f8b;
  --color01-600: #545663;
  --color01-700: #2b2d3a;

  /* Secondary Color */
  --color02-300: #ccd0db;
  --color02-400: #a4a8b3;
  --color02-500: #7c7f8b;
  --color02-600: #545663;
  --color02-700: #2b2d3a;

  /* Utils */
  --focus-ring-500: #0b5ed7;
  --overlay-l: rgba(233, 236, 239, 0.8);
  --overlay-d: rgba(52, 58, 64, 0.8);

  /* Light Theme */
  --bg: var(--neutral-0);
  --surface: var(--neutral-1);
  --surface-2: var(--neutral-2);
  --surface-3: var(--neutral-3);
  --border: var(--neutral-4);
  --divider: var(--neutral-5);
  --text-muted: var(--neutral-6);
  --text: var(--neutral-8);

  --primary: var(--color02-400);
  --primary-hover: var(--color02-600);
  --primary-foreground: var(--color02-700);
  --primary-contrast: var(--color02-300);

  --accent: var(--color01-700);
  --accent-hover: var(--color01-500);
  --link: var(--color01-700);
  --link-hover: var(--color01-500);

  --focus-ring: var(--focus-ring-500);
  --overlay: var(--overlay-l);

  --font-primary: "Times New Roman", Times, serif;
  --font-secondary: "Roboto", system-ui, -apple-system, "Segoe UI", Arial,
    sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, SFMono-Regular, Menlo, Consolas,
    monospace;
}

/* Dark Theme */
:root[data-theme="dark"] {
  --bg: var(--neutral-8);
  --surface: var(--neutral-7);
  --surface-2: var(--neutral-6);
  --surface-3: var(--neutral-5);
  --border: var(--neutral-5);
  --divider: var(--neutral-4);
  --text-muted: var(--neutral-3);
  --text: var(--neutral-0);

  --primary: var(--color01-700);
  --primary-hover: var(--color01-500);
  --primary-foreground: var(--color01-300);
  --primary-contrast: var(--neutral-8);

  --accent: var(--color02-300);
  --accent-hover: var(--color02-500);
  --link: var(--color02-300);
  --link-hover: var(--color02-500);

  --focus-ring: var(--focus-ring-500);
  --overlay: var(--overlay-d);
}

/* General Formats */
body {
  color: var(--text);
  background-color: var(--bg);
  font-family: var(--font-primary);
}

li {
  list-style-type: none;
}

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

a:hover {
  color: var(--link-hover);
}

img,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

.skip-link {
  position: fixed;
  left: -9999px;
  top: auto;
  z-index: 1000;
}
.skip-link:focus {
  left: 1rem;
  top: 1rem;
  background: var(--surface);
  color: var(--text);
  border: 1px solid var(--border);
  padding: 0.5rem 0.75rem;
  border-radius: 0.5rem;
}

.selector {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 2rem;
  height: 2rem;
  color: var(--link);
  cursor: pointer;
}

.selector:hover {
  color: var(--link-hover);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.5rem 1rem;
  border-radius: 0.5rem;
  text-decoration: none;
  border: 1px solid var(--border);
  font-family: var(--font-secondary);
  font-size: 0.875rem;
}
.btn.primary {
  background: var(--primary);
  color: var(--primary-foreground);
}
.btn.primary:hover {
  background: var(--primary-hover);
  color: var(--primary-contrast);
}
.btn.ghost {
  background: var(--surface-2);
  color: var(--accent);
  border-color: var(--border);
}
.btn.ghost:hover {
  background: var(--accent-hover);
  color: var(--bg);
}

.btn:focus-visible,
.selector:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

/* header */
header {
  display: flex;
  justify-content: space-between;
  align-items: center;

  position: sticky;
  top: 0;
  z-index: 100;
  height: 5rem;

  font-family: var(--font-primary);
  padding: 1rem 6rem;

  background: var(--bg);
  border-bottom: 1px solid var(--border);
}

header .logo {
  display: flex;
  justify-content: flex-start;
  align-items: center;

  font-size: 2rem;

  height: 100%;

  /* background-color: var(--overlay); */

  /* border: 1px solid var(--border); */
  /* border-radius: 0.5rem; */
}

header .right {
  display: flex;
  justify-content: flex-end;
  align-items: center;
  position: relative;

  font-family: var(--font-secondary);

  height: 100%;

  /* background-color: var(--overlay); */

  /* border: 1px solid var(--border); */
  /* border-radius: 0.5rem; */
}

header nav ul {
  display: flex;
}

header li {
  border-right: 1px solid var(--border);
}

header a {
  padding: 0.5rem;
}

header a:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
  border-radius: 0.25rem;
}

/* header > burger */
.burger {
  font-size: 1.25rem;
  background: transparent;
  border: none;
  display: none;
}

/* header > button-theme-toggle */
#theme-toggle {
  background: transparent;
  border: none;
}

#theme-toggle .sun,
#theme-toggle .moon {
  width: 1.125rem;
  height: auto;
}
#theme-toggle .sun {
  display: none;
}
:root[data-theme="dark"] #theme-toggle .sun {
  display: inline;
}
#theme-toggle .moon {
  display: inline;
}
:root[data-theme="dark"] #theme-toggle .moon {
  display: none;
}

/* main */
main {
  min-height: 480px;
  margin: 2rem 6rem 6rem 6rem;
}

main section {
  max-width: 720px;
  margin: 3rem auto;
  line-height: 1.25;
}

main section h2 {
  font-size: 1.25rem;
}

/* main > section-hero */
#hero {
  display: flex;
  justify-content: center;
}

#hero .finalGoal {
  max-width: 720px;
  display: grid;
  grid-template-columns: auto 1fr;
  margin: 6rem 0;
  align-items: center;
  text-align: center;
  font-size: 2.5rem;
  color: var(--accent);
}

/* main > section-goals */
#goals .text {
  text-align: justify;
  font-size: 1.25rem;
  margin: 2rem 0 6rem 0;
}

/* main > section-articles */
.card {
  display: flex;
  flex-direction: column;
  margin: 2rem 0;
  gap: 0.5rem;

  /* background: var(--surface); */
  /* border: 1px solid var(--border); */
  /* border-radius: 0.5rem; */
}

.card h3 {
  margin: 0;
  font-size: 1.25rem;
  text-transform: uppercase;
}

.card h4 {
  margin: 0;
  font-size: 1rem;
  text-transform: uppercase;
}

.card .info {
  display: flex;
  justify-content: center;
  align-items: center;
  flex-wrap: wrap;
  font-size: 1rem;
  color: var(--text-muted);
  gap: 0.5rem 1rem;
}

/* main > section-contact */
#contact {
  max-width: 400px;
  margin: 3rem auto;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 2rem 0 6rem 0;
}

.contact-form label {
  font-family: var(--font-secondary);
  font-size: 0.875rem;
  color: var(--text-muted);
}

.contact-form input,
.contact-form textarea {
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: 0.5rem;
  background-color: var(--surface);
  color: var(--text);
  font-family: var(--font-primary);
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}

.contact-form button {
  align-self: flex-end;
  margin-top: 1rem;
  cursor: pointer;
}

/* footer */
footer {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 1.5rem 6rem;
  background-color: var(--bg);
  border-top: 1px solid var(--border);
  gap: 1rem;
}

footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}
footer p + p {
  margin-top: 0.25rem;
}
footer a {
  color: var(--link);
  margin: 0 0.5rem;
}
footer a:hover {
  color: var(--link-hover);
}

footer .links {
  display: flex;
  justify-content: space-between;
}

/* focus */
:focus-visible {
  outline: 2px solid var(--focus-ring);
  outline-offset: 2px;
}
:focus {
  outline: none;
}

/* media queries */
@media (max-width: 600px) {
  header .right {
    position: relative;
  }

  header .right #nav {
    display: none;
    position: absolute;
    top: 100%;
    right: 0;
    width: max-content;
    flex-direction: column;
    z-index: 100;

    background-color: var(--surface);

    border: 1px solid var(--border);
    border-radius: 0.5rem;
  }

  header .right #nav.open {
    display: block;
  }

  header .right #nav a {
    display: block;
    padding: 0.25rem 1rem;
    color: var(--link);
    text-decoration: none;
    white-space: nowrap;
  }
  header .right #nav a:hover {
    color: var(--link-hover);
    background-color: var(--surface-2);
  }

  header nav ul {
    display: block;
    margin: 0;
    padding: 0;
  }
  header nav li {
    border-right: none;
    list-style: none;
    margin: 0;
  }

  header nav li + li {
    border-top: 1px solid var(--border);
  }

  .burger {
    display: block;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation: none;
    transition: none;
  }
  html:focus-within {
    scroll-behavior: auto;
  }
}