/* Kallisti's website: dark, bold and round, after Discord's site, in
   Kallisti's teal. No build step, no external fonts. */
:root {
  --bg: #0d1117;
  --bg-2: #151b23;
  --card: #1c2430;
  --text: #f2f4f7;
  --muted: #a9b1bd;
  --accent: #3eb1a3;
  --accent-deep: #1d5f58;
  --radius: 28px;
  color-scheme: dark;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  color: var(--text);
  background: var(--bg);
  -webkit-font-smoothing: antialiased;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
}

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

a {
  color: inherit;
}

h1,
h2,
h3 {
  margin: 0 0 16px;
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.05;
}

h1 {
  font-size: clamp(40px, 6vw, 72px);
  text-transform: uppercase;
}

h2 {
  font-size: clamp(32px, 4vw, 48px);
}

p {
  margin: 0 0 16px;
  font-size: 18px;
  line-height: 1.6;
  color: var(--muted);
}

/* Navigation */
.nav {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  gap: 32px;
  align-items: center;
  padding: 16px clamp(16px, 5vw, 64px);
  background: rgb(13 17 23 / 0.85);
  backdrop-filter: blur(12px);
}

.brand {
  display: flex;
  gap: 10px;
  align-items: center;
  font-size: 20px;
  font-weight: 800;
  text-decoration: none;
}

.brand img {
  border-radius: 8px;
}

.nav nav {
  display: flex;
  flex: 1;
  gap: 28px;
  justify-content: center;
}

.nav nav a {
  font-weight: 600;
  text-decoration: none;
}

.nav nav a:hover {
  text-decoration: underline;
}

/* Buttons: round, like Discord's */
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 56px;
  padding: 0 32px;
  border-radius: 999px;
  font-size: 18px;
  font-weight: 700;
  text-decoration: none;
  transition:
    box-shadow 0.15s,
    background 0.15s,
    color 0.15s;
}

.button.small {
  min-height: 40px;
  padding: 0 18px;
  font-size: 14px;
}

.button.light {
  background: #fff;
  color: #10141a;
}

.button.light:hover {
  color: var(--accent-deep);
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.35);
}

.button.dark {
  background: #222831;
  color: #fff;
}

.button.dark:hover {
  background: #2c3440;
  box-shadow: 0 8px 24px rgb(0 0 0 / 0.35);
}

/* Hero */
.hero {
  position: relative;
  display: grid;
  gap: 48px;
  justify-items: center;
  padding: clamp(48px, 8vw, 112px) clamp(16px, 5vw, 64px) 0;
  overflow: hidden;
  text-align: center;
  background:
    radial-gradient(60% 60% at 50% 0%, rgb(62 177 163 / 0.45), transparent 70%),
    linear-gradient(180deg, #12302f 0%, var(--bg) 85%);
}

.hero-text {
  max-width: 840px;
}

.hero-text p {
  margin-inline: auto;
  max-width: 720px;
  font-size: 20px;
  color: #d5dbe3;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  justify-content: center;
  margin-top: 32px;
}

.hero-shot {
  width: min(1200px, 100%);
  margin-bottom: -4px;
}

.hero-shot img,
.feature img {
  border-radius: 16px;
  box-shadow:
    0 0 0 1px rgb(255 255 255 / 0.08),
    0 30px 80px rgb(0 0 0 / 0.55);
}

.hero-shot img {
  border-bottom-left-radius: 0;
  border-bottom-right-radius: 0;
}

/* Features: picture and text, alternating sides */
.feature {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: clamp(32px, 6vw, 96px);
  align-items: center;
  max-width: 1280px;
  margin: 0 auto;
  padding: clamp(64px, 9vw, 128px) clamp(16px, 5vw, 64px);
}

.feature.reverse {
  grid-template-columns: 1fr 1.4fr;
}

/* A picture with a credit line under it. */
.feature figure {
  margin: 0;
}

.feature figcaption {
  margin-top: 14px;
  color: var(--muted);
  text-align: center;
}

/* Long lines (the commands) must not widen a column. */
.feature > * {
  min-width: 0;
}

.feature.reverse > :first-child {
  order: 2;
}

.pair {
  position: relative;
}

.pair img:not(.phone) {
  width: 92%;
  margin-left: auto;
}

.pair .phone {
  position: absolute;
  bottom: -32px;
  left: 0;
  z-index: 1;
  width: 28%;
  border-radius: 24px;
}

.card {
  padding: 32px;
  border-radius: var(--radius);
  background: var(--card);
}

.code .caption {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}

.code pre {
  margin: 0;
  padding: 20px;
  overflow-x: auto;
  border-radius: 16px;
  background: #0b0f14;
  font-size: 14px;
  line-height: 1.7;
}

.link {
  font-weight: 700;
  color: var(--accent);
  text-decoration: none;
}

.link:hover {
  text-decoration: underline;
}

/* Downloads */
.download {
  padding: clamp(64px, 9vw, 128px) clamp(16px, 5vw, 64px);
  text-align: center;
  background:
    radial-gradient(50% 80% at 50% 100%, rgb(62 177 163 / 0.3), transparent 70%),
    var(--bg-2);
}

.download .sub {
  margin-inline: auto;
  max-width: 640px;
}

.cards {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 24px;
  max-width: 1080px;
  margin: 40px auto;
}

.platform {
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  border: 2px solid transparent;
}

.platform h3 {
  margin: 0;
  font-size: 28px;
}

.platform p {
  margin-bottom: 16px;
}

/* The visitor's system (see main.js) */
.platform.yours {
  border-color: var(--accent);
}

.alt {
  margin-top: 4px;
  font-size: 15px;
  font-weight: 600;
  color: var(--muted);
}

/* Footer */
footer {
  display: grid;
  gap: 8px;
  justify-items: center;
  padding: 48px 16px 64px;
  text-align: center;
}

footer p {
  margin: 0;
  font-size: 15px;
}

/* Narrow screens */
/* The features page */
.page-head {
  max-width: 900px;
  margin: 0 auto;
  padding: clamp(64px, 9vw, 120px) clamp(16px, 5vw, 64px) 0;
  text-align: center;
}

.jump {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.jump a {
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--card);
  font-size: 15px;
  font-weight: 600;
  text-decoration: none;
}

.jump a:hover {
  background: var(--accent-deep);
}

.nav nav a[aria-current="page"] {
  color: var(--accent);
}

.group {
  padding-top: clamp(48px, 6vw, 96px);
  padding-bottom: clamp(48px, 6vw, 96px);
  scroll-margin-top: 72px;
}

.list {
  margin: 0;
  padding: 0;
  list-style: none;
}

.list li {
  margin: 0 0 12px;
  padding-left: 22px;
  position: relative;
  font-size: 17px;
  line-height: 1.5;
  color: var(--muted);
}

.list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.6em;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
}

.list b {
  color: var(--text);
}

.list code {
  font-size: 15px;
}

.tag {
  display: inline-block;
  padding: 1px 8px;
  border-radius: 999px;
  background: var(--accent-deep);
  color: var(--text);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.02em;
  vertical-align: 2px;
  white-space: nowrap;
}

.small {
  font-size: 15px;
}

.checklist ul {
  margin: 0;
  padding-left: 20px;
  font-size: 18px;
  line-height: 1.9;
}

.checklist .caption,
.code .caption {
  font-size: 14px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--accent);
}

.note {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 clamp(16px, 5vw, 64px) clamp(64px, 9vw, 120px);
  text-align: center;
}

.ports {
  margin: 16px 0 0;
}

.more {
  padding-bottom: 0;
}

@media (max-width: 860px) {
  .nav nav {
    display: none;
  }

  .nav {
    justify-content: space-between;
  }

  .feature,
  .feature.reverse {
    grid-template-columns: 1fr;
  }

  .feature.reverse > :first-child {
    order: 0;
  }

  .cards {
    grid-template-columns: 1fr;
  }

  .pair .phone {
    bottom: -16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .button {
    transition: none;
  }
}

/* Screenshots open at full size (lightbox.js). */
.zoomable {
  cursor: zoom-in;
}

.zoomable:focus-visible {
  outline: 3px solid var(--accent);
  outline-offset: 4px;
}

html.lightbox-open {
  overflow: hidden;
}

.lightbox {
  width: 100vw;
  max-width: 100vw;
  height: 100vh;
  max-height: 100vh;
  padding: 24px;
  border: 0;
  background: transparent;
  cursor: zoom-out;
}

.lightbox[open] {
  display: flex;
  flex-direction: column;
  gap: 12px;
  align-items: center;
  justify-content: center;
}

.lightbox::backdrop {
  background: rgb(0 0 0 / 0.94);
}

.lightbox img {
  max-width: 100%;
  max-height: calc(100vh - 110px);
  object-fit: contain;
  border-radius: 12px;
  box-shadow: 0 30px 80px rgb(0 0 0 / 0.6);
}

.lightbox-caption {
  max-width: 80ch;
  margin: 0;
  color: var(--muted);
  text-align: center;
}

.lightbox-close {
  position: fixed;
  top: 16px;
  right: 20px;
  width: 44px;
  height: 44px;
  border: 0;
  border-radius: 50%;
  background: rgb(255 255 255 / 0.12);
  color: var(--text);
  font-size: 28px;
  line-height: 1;
  cursor: pointer;
}

.lightbox-close:hover,
.lightbox-close:focus-visible {
  background: rgb(255 255 255 / 0.24);
}