/* Reset, page frame and the shared pieces: bus, nodes, panels, tokens, buttons. */

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: 5rem;
  -webkit-text-size-adjust: 100%;
  /* The pointer is a "</>"; it points with the tip of the "<". */
  cursor: url("../img/cursor.svg") 3 16, auto;
}

a,
button,
label {
  cursor: url("../img/cursor-link.svg") 3 16, pointer;
}

input,
textarea {
  cursor: text;
}

body {
  margin: 0;
  background-color: var(--void);
  /* Dot grid, on the same pitch as the traces drawn in the hero. */
  background-image: radial-gradient(circle, rgba(45, 123, 255, 0.2) 1px, transparent 1.5px);
  background-size: var(--grid) var(--grid);
  background-position: calc(var(--grid) / 2) calc(var(--grid) / 2);
  color: var(--text);
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1,
h2,
h3,
h4,
p,
ul,
ol,
dl,
dd {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

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

a {
  color: var(--arc);
  text-decoration-color: var(--line-strong);
  text-underline-offset: 0.2em;
}

a:hover {
  color: #fff;
  text-decoration-color: var(--arc);
}

:focus-visible {
  outline: 2px solid var(--arc);
  outline-offset: 3px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip-path: inset(50%);
  white-space: nowrap;
}

.skip-link {
  position: fixed;
  top: 0.75rem;
  left: 0.75rem;
  z-index: 20;
  padding: 0.5rem 0.875rem;
  background: var(--signal);
  color: #000;
  transform: translateY(-200%);
}

.skip-link:focus {
  transform: none;
}

/* Soft light that follows the pointer (position set in js/pointer.js). */
.spotlight {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: radial-gradient(
    24rem circle at var(--spot-x, 50%) var(--spot-y, -30%),
    rgba(45, 123, 255, 0.13),
    transparent 70%
  );
}

/* Top bar. The mark sits on the bus, as its origin. */
.topbar {
  position: fixed;
  inset: 0 0 auto;
  z-index: 10;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 4rem;
  padding-right: var(--gutter);
  background: linear-gradient(#000 30%, transparent);
  pointer-events: none;
}

.topbar__mark,
.topbar__right {
  pointer-events: auto;
}

.topbar__right {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.25rem);
  align-items: center;
}

/* Language switcher: one flag per language, the current one lit. */
.languages {
  display: flex;
  gap: 0.5rem;
}

.languages__option {
  display: block;
  padding: 2px;
  border: 1px solid transparent;
  opacity: 0.45;
  transition:
    opacity 0.2s,
    border-color 0.2s,
    box-shadow 0.2s;
}

.languages__option:hover {
  opacity: 1;
}

.languages__option[aria-current="true"] {
  border-color: var(--arc);
  box-shadow: 0 0 10px rgba(45, 123, 255, 0.8);
  opacity: 1;
}

.flag {
  display: block;
  width: 1.625rem;
  height: auto;
}

.topbar__mark {
  display: grid;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  margin-left: calc(var(--bus-x) - 1.125rem);
  border: 1px solid var(--signal);
  background: var(--void);
  color: var(--arc);
  text-decoration: none;
  transition:
    color 0.2s,
    box-shadow 0.2s;
}

.topbar__mark:hover {
  color: #fff;
  box-shadow: 0 0 14px rgba(45, 123, 255, 0.7);
}

.topbar__mark svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.topbar__nav {
  display: flex;
  gap: clamp(1rem, 2.5vw, 2.25rem);
}

.topbar__nav a {
  padding: 0.5rem 0;
  border-bottom: 1px solid transparent;
  color: var(--muted);
  font-size: 0.9375rem;
  text-decoration: none;
}

.topbar__nav a:hover,
.topbar__nav a.is-active {
  border-bottom-color: var(--signal);
  color: #fff;
}

.topbar__toggle {
  display: none;
  place-items: center;
  width: 2.25rem;
  height: 2.25rem;
  padding: 0;
  border: 1px solid var(--line-strong);
  background: var(--void);
  color: var(--arc);
}

.topbar__toggle[aria-expanded="true"] {
  border-color: var(--arc);
}

.topbar__toggle svg {
  width: 1.25rem;
  height: 1.25rem;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
}

/* Small screens: the section links fold into a panel opened by the button. */
@media (max-width: 64rem) {
  .topbar__right {
    gap: 0.875rem;
  }

  .js .topbar__toggle {
    display: grid;
  }

  .js .topbar__nav {
    position: absolute;
    top: 3.75rem;
    right: var(--gutter);
    display: none;
    flex-direction: column;
    gap: 0;
    min-width: 13rem;
    padding: 0.5rem 0;
    border: 1px solid var(--line-strong);
    background: var(--panel);
  }

  .js .topbar__nav.is-open {
    display: flex;
  }

  .js .topbar__nav a {
    padding: 0.75rem 1.25rem;
    border-bottom: 0;
    border-left: 2px solid transparent;
    font-size: 1rem;
  }

  .js .topbar__nav a:hover,
  .js .topbar__nav a.is-active {
    border-left-color: var(--signal);
  }

  /* Without JavaScript there is no button: keep the one link that matters most. */
  html:not(.js) .topbar__nav a:not([href="#contato"]) {
    display: none;
  }
}

/* The schematic: bus on the left, signal running down it with the scroll. */
.schematic {
  position: relative;
  z-index: 1;
}

.bus {
  position: absolute;
  top: 0;
  bottom: 0;
  left: var(--bus-x);
  z-index: 2;
  width: 1px;
  background: var(--line);
  pointer-events: none;
}

.bus__signal {
  position: absolute;
  top: 0;
  left: 0;
  width: 1px;
  height: var(--signal-y, 0);
  background: linear-gradient(to bottom, var(--signal), var(--arc));
  box-shadow: 0 0 8px var(--signal);
}

.bus__head {
  position: absolute;
  top: -3px;
  left: -3px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: #fff;
  box-shadow: 0 0 10px 3px var(--arc);
  opacity: 0;
  transform: translateY(var(--signal-y, 0));
}

.js .bus__head {
  opacity: 1;
}

/* A node is where a component taps the bus: a diamond on the bus and a short
   lead to the component. It lights up when the signal reaches it. */
.node {
  position: absolute;
  top: var(--node-top, 50%);
  left: calc(-1 * var(--tap));
  width: var(--tap);
  height: 1px;
  pointer-events: none;
}

.node::before {
  content: "";
  position: absolute;
  inset: 0 0.875rem 0 0;
  background: var(--line-strong);
  transform-origin: left;
  transition:
    transform 0.5s cubic-bezier(0.2, 0.7, 0.2, 1),
    background-color 0.4s;
}

.node::after {
  content: "";
  position: absolute;
  top: -4px;
  left: -4px;
  width: 9px;
  height: 9px;
  border: 1px solid var(--line-strong);
  background: var(--void);
  transform: rotate(45deg);
  transition:
    background-color 0.3s,
    border-color 0.3s,
    box-shadow 0.3s;
}

.motion .node::before {
  transform: scaleX(0);
}

.node.is-live::before {
  background: var(--signal);
  transform: none;
}

.node.is-live::after {
  border-color: var(--arc);
  background: var(--arc);
  box-shadow:
    0 0 0 4px rgba(45, 123, 255, 0.2),
    0 0 16px var(--signal);
}

/* Section frame */
.block {
  position: relative;
  padding: var(--block-space) var(--gutter) 0 var(--content-x);
}

.block:last-of-type {
  padding-bottom: var(--block-space);
}

.block__head {
  position: relative;
  margin-bottom: clamp(1.75rem, 4vw, 3rem);
}

.block__title {
  color: #fff;
  font-family: var(--font-display);
  font-size: var(--text-title);
  font-weight: 400;
  line-height: 1.25;
}

.block__subtitle {
  margin-bottom: 1.5rem;
  color: var(--muted);
  font-size: var(--text-base);
  font-weight: 500;
}

.block__lead {
  max-width: var(--measure);
  margin-bottom: 2.25rem;
  color: #fff;
  font-size: var(--text-lead);
  line-height: 1.5;
}

/* Panel: a component drawn on the schematic, one corner cut. */
.panel {
  position: relative;
  border: 1px solid var(--line);
  background: var(--panel);
  clip-path: polygon(0 0, calc(100% - var(--cut)) 0, 100% var(--cut), 100% 100%, 0 100%);
}

.panel::before {
  content: "";
  position: absolute;
  top: -1px;
  right: -1px;
  width: var(--cut);
  height: var(--cut);
  background: linear-gradient(
    to top right,
    transparent calc(50% - 0.75px),
    var(--line-strong) calc(50% - 0.75px),
    var(--line-strong) calc(50% + 0.75px),
    transparent calc(50% + 0.75px)
  );
  pointer-events: none;
}

/* Logo plate: a company or tool mark in its own colours, on a light ground
   (or a dark one, for marks drawn in white). */
.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 7.5rem;
  height: 3.25rem;
  padding: 0.5rem 0.75rem;
  background: #f1f6ff;
  clip-path: polygon(0 0, calc(100% - 9px) 0, 100% 9px, 100% 100%, 0 100%);
}

.logo--dark {
  background: #0b1a33;
}

.logo img {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
}

/* Technology tokens */
.tokens {
  display: flex;
  flex-wrap: wrap;
  gap: 0.375rem;
}

.token {
  padding: 0.25rem 0.5rem;
  border: 1px solid var(--line-strong);
  background: rgba(45, 123, 255, 0.06);
  color: var(--arc);
  font-family: var(--font-mono);
  font-size: var(--text-small);
  line-height: 1.3;
}

/* Buttons */
.button {
  --button-cut: 10px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 2.875rem;
  padding: 0.625rem 1.375rem;
  border: 1px solid var(--line-strong);
  background:
    linear-gradient(
        to top right,
        transparent calc(50% - 0.75px),
        var(--line-strong) calc(50% - 0.75px),
        var(--line-strong) calc(50% + 0.75px),
        transparent calc(50% + 0.75px)
      )
      top right / var(--button-cut) var(--button-cut) no-repeat,
    rgba(0, 0, 0, 0.6);
  clip-path: polygon(
    0 0,
    calc(100% - var(--button-cut)) 0,
    100% var(--button-cut),
    100% 100%,
    0 100%
  );
  color: var(--text);
  font: 500 1rem/1.2 var(--font-body);
  text-decoration: none;
  cursor: pointer;
  transition:
    background-color 0.2s,
    border-color 0.2s,
    color 0.2s;
}

.button:hover {
  border-color: var(--arc);
  color: #fff;
}

.button:focus-visible {
  outline-offset: -5px;
}

.button--primary {
  border-color: var(--signal);
  background: var(--signal);
  color: #000;
}

.button--primary:hover {
  border-color: var(--arc);
  background: var(--arc);
  color: #000;
}

.button--primary:focus-visible {
  outline-color: #000;
}

.button:disabled {
  cursor: progress;
  opacity: 0.6;
}

/* Text being decoded (js/motion.js): typed in behind a couple of raw glyphs. */
.decode__edge {
  color: var(--arc);
}

.decode__rest {
  opacity: 0;
}

/* With motion on, components stay dark until the signal reaches their node. */
.motion [data-part],
.motion [data-led],
.motion [data-decode] {
  opacity: 0;
}

@keyframes live {
  50% {
    opacity: 0.35;
  }
}

@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}