/* Adventure Video Editor: a topo map for the page, the app's own dark UI for the screenshots. */

:root {
  --paper: #e4e9dc;        /* map paper */
  --paper-deep: #d6ddca;
  --ink: #1b281f;          /* forest ink */
  --ink-soft: #46574b;
  --contour: #9a6a3c;      /* contour lines */
  --forest: #1f3127;       /* the ground under the elevation profile */
  --forest-raised: #29402f;
  --on-forest: #e6ecdf;
  --on-forest-soft: #a9b8a6;
  --signal: #ef6a1f;       /* the gauge orange from the widgets */
  --signal-hover: #ff7f36;
  --link: #255c78;

  --display: "Saira Condensed", "Arial Narrow", sans-serif;
  --body: "Public Sans", system-ui, sans-serif;

  --step--1: 0.875rem;
  --step-0: 1.0625rem;
  --step-1: 1.3rem;
  --step-2: clamp(1.9rem, 1.2rem + 2.6vw, 2.9rem);
  --step-3: clamp(3rem, 1.4rem + 6.6vw, 6.4rem);

  --wrap: 1180px;
  --gutter: clamp(16px, 4vw, 40px);
  --radius-shot: 10px;
  color-scheme: light;
}

*, *::before, *::after { box-sizing: border-box; }
html { -webkit-text-size-adjust: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--paper);
  color: var(--ink);
  font: 400 var(--step-0)/1.6 var(--body);
  text-rendering: optimizeLegibility;
}
img { display: block; max-width: 100%; height: auto; }
a { color: var(--link); text-underline-offset: 0.18em; }
a:hover { color: var(--ink); }
:focus-visible { outline: 3px solid var(--signal); outline-offset: 3px; border-radius: 4px; }

.wrap { width: min(100% - 2 * var(--gutter), var(--wrap)); margin-inline: auto; }

h1, h2, h3 {
  font-family: var(--display);
  font-weight: 800;
  line-height: 0.98;
  letter-spacing: -0.01em;
  margin: 0;
}
h2 { font-size: var(--step-2); }
h3 { font-size: var(--step-1); font-weight: 700; line-height: 1.15; letter-spacing: 0; }
p { margin: 0; max-width: 62ch; }

/* ---------- Header ---------- */

.site-header { position: relative; z-index: 2; }
.site-header .wrap {
  display: flex; align-items: center; justify-content: space-between; gap: 16px;
  padding-block: 18px;
}
.wordmark {
  display: inline-flex; align-items: center; gap: 10px;
  color: var(--ink); text-decoration: none;
  font: 700 1.35rem/1 var(--display);
}
.wordmark img { width: 34px; height: 34px; border-radius: 8px; }
.site-nav { display: flex; align-items: center; gap: clamp(12px, 3vw, 28px); font-weight: 600; font-size: var(--step--1); }
.site-nav a { color: var(--ink); text-decoration: none; }
.site-nav a:hover { text-decoration: underline; }
.site-nav .nav-download {
  border: 2px solid var(--ink); border-radius: 999px; padding: 6px 14px;
}
.site-nav .nav-download:hover { background: var(--ink); color: var(--paper); text-decoration: none; }
@media (max-width: 560px) { .site-nav .nav-hide-small { display: none; } }

/* ---------- Buttons ---------- */

.button {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 14px 22px; border-radius: 999px;
  font: 700 var(--step-0)/1 var(--body); text-decoration: none;
  background: var(--signal); color: var(--ink);
  border: 0; cursor: pointer;
}
.button:hover { background: var(--signal-hover); color: var(--ink); }
.button svg { width: 18px; height: 18px; flex: none; }
.text-link { font-weight: 600; }

/* ---------- Hero ---------- */

.hero {
  position: relative;
  background: var(--paper) url("img/contours.svg") center / cover no-repeat;
  padding-top: clamp(24px, 5vw, 64px);
}
.hero-grid {
  display: grid; gap: clamp(28px, 4vw, 56px); align-items: center;
  grid-template-columns: minmax(0, 5fr) minmax(0, 7fr);
}
.hero h1 { font-size: var(--step-3); max-width: 9ch; }
.hero-lede { margin-top: 22px; font-size: var(--step-1); line-height: 1.5; color: var(--ink-soft); max-width: 36ch; }
.hero-actions { margin-top: 30px; display: flex; flex-wrap: wrap; align-items: center; gap: 14px 24px; }
.hero-note { margin-top: 16px; font-size: var(--step--1); color: var(--ink-soft); }

.hero-frame { margin: 0; }
.hero-frame img {
  border-radius: var(--radius-shot);
  border: 3px solid var(--ink);
  box-shadow: 14px 14px 0 var(--paper-deep);
  aspect-ratio: 2250 / 1180; object-fit: cover; width: 100%;
}
.hero-frame figcaption {
  margin-top: 14px; font-size: var(--step--1); color: var(--ink-soft); font-style: italic;
}

@media (max-width: 880px) {
  .hero-grid { grid-template-columns: 1fr; }
  .hero h1 { max-width: 12ch; }
}

/* ---------- Elevation profile: the hero's ground line ---------- */

.terrain { display: block; width: 100%; height: clamp(90px, 14vw, 170px); }
.terrain .ground { fill: var(--forest); }
.terrain .ridge { fill: none; stroke: var(--contour); stroke-width: 2.5; stroke-linejoin: round; vector-effect: non-scaling-stroke; }
.terrain .playhead { stroke: var(--on-forest); stroke-width: 1.5; vector-effect: non-scaling-stroke; }
.terrain .playhead-dot { fill: var(--signal); }

.terrain-wrap { position: relative; margin-top: clamp(32px, 6vw, 72px); }
.terrain-dot {
  position: absolute; left: 2%; top: 7.5%;
  width: 14px; height: 14px; margin: -7px 0 0 -7px; border-radius: 50%;
  background: var(--signal); box-shadow: 0 0 0 3px var(--paper);
}

@media (prefers-reduced-motion: no-preference) {
  .terrain-dot { opacity: 0; animation: appear 0.4s 1.4s forwards; }
  .terrain .ridge { stroke-dasharray: 1; stroke-dashoffset: 1; animation: draw 1.8s 0.2s cubic-bezier(.45,.05,.2,1) forwards; }
  .terrain .playhead, .terrain .playhead-dot { opacity: 0; animation: appear 0.4s 1.4s forwards; }
}
@keyframes draw { to { stroke-dashoffset: 0; } }
@keyframes appear { to { opacity: 1; } }

/* ---------- Features (on the forest ground) ---------- */

.features { background: var(--forest); color: var(--on-forest); padding-block: clamp(24px, 4vw, 48px) clamp(64px, 9vw, 120px); }
.features a { color: #9fd3ee; }
.terrain-caption { color: var(--on-forest-soft); font-size: var(--step--1); font-style: italic; }

.feature {
  display: grid; gap: clamp(24px, 4vw, 56px); align-items: center;
  grid-template-columns: minmax(0, 4fr) minmax(0, 8fr);
  margin-top: clamp(56px, 8vw, 110px);
}
.feature:nth-of-type(even) { grid-template-columns: minmax(0, 8fr) minmax(0, 4fr); }
.feature:nth-of-type(even) .feature-text { order: 2; }
.feature h2 { color: #fff; }
.feature p { margin-top: 16px; color: var(--on-forest-soft); }
.feature ul { margin: 18px 0 0; padding: 0; list-style: none; color: var(--on-forest); font-size: var(--step--1); }
.feature li { padding: 7px 0 7px 22px; border-top: 1px solid rgba(230, 236, 223, 0.14); position: relative; }
.feature li::before {
  content: ""; position: absolute; left: 2px; top: 0.95em; width: 8px; height: 8px;
  border-radius: 50%; border: 2px solid var(--signal);
}
.shot { margin: 0; }
.shot img {
  border-radius: var(--radius-shot);
  box-shadow: 0 0 0 1px rgba(255, 255, 255, 0.08), 0 24px 60px rgba(0, 0, 0, 0.45);
  width: 100%;
}
.shot-wide { grid-column: 1 / -1; }

@media (max-width: 880px) {
  .feature, .feature:nth-of-type(even) { grid-template-columns: 1fr; }
  .feature:nth-of-type(even) .feature-text { order: 0; }
}

.also { margin-top: clamp(64px, 9vw, 120px); border-top: 2px solid var(--contour); padding-top: 32px; }
.also-list { display: grid; grid-template-columns: repeat(auto-fit, minmax(240px, 1fr)); gap: 28px 40px; margin: 28px 0 0; }
.also-list dt { font: 700 var(--step-1)/1.15 var(--display); color: #fff; }
.also-list dd { margin: 8px 0 0; color: var(--on-forest-soft); font-size: var(--step--1); line-height: 1.55; }

/* ---------- Example videos ---------- */

.videos { padding-block: clamp(64px, 9vw, 120px); background: var(--paper) url("img/contours.svg") center / cover no-repeat; }
.videos .intro { margin-top: 14px; color: var(--ink-soft); }
.shapes {
  display: grid; gap: clamp(12px, 2vw, 24px); margin-top: 36px; align-items: start;
  grid-template-columns: minmax(0, 1.7778fr) minmax(0, 0.5625fr) minmax(0, 1fr);
}
.shape {
  aspect-ratio: var(--r);
  border: 2px dashed var(--contour); border-radius: var(--radius-shot);
  background: rgba(228, 233, 220, 0.75);
  display: flex; flex-direction: column; justify-content: flex-end; gap: 4px; padding: clamp(12px, 2vw, 20px);
}
.shape strong { font: 700 var(--step-1)/1.1 var(--display); }
.shape span { font-size: var(--step--1); color: var(--ink-soft); }
@media (max-width: 680px) {
  .shapes { grid-template-columns: 1fr; }
  .shape-tall { width: 60%; }
  .shape-square { width: 80%; }
}

/* ---------- Download band ---------- */

.get { background: var(--forest-raised); color: var(--on-forest); padding-block: clamp(56px, 8vw, 100px); }
.get-grid { display: grid; grid-template-columns: minmax(0, 6fr) minmax(0, 5fr); gap: clamp(28px, 5vw, 72px); align-items: start; }
.get h2 { color: #fff; }
.get p { margin-top: 14px; color: var(--on-forest-soft); }
.get a:not(.button) { color: #9fd3ee; }
.get .button { margin-top: 26px; }
.latest-meta { margin-top: 14px; font-size: var(--step--1); color: var(--on-forest-soft); }
.get-aside { border-left: 2px solid var(--contour); padding-left: 24px; }
.get-aside h3 { color: #fff; }
@media (max-width: 880px) { .get-grid { grid-template-columns: 1fr; } }

/* ---------- Footer ---------- */

.site-footer { padding-block: 36px; font-size: var(--step--1); color: var(--ink-soft); }
.site-footer .wrap { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 12px 24px; align-items: center; }
.site-footer nav { display: flex; gap: 20px; }

/* ---------- Downloads page ---------- */

.page-head { padding-block: clamp(24px, 5vw, 56px) 8px; }
.page-head h1 { font-size: clamp(2.8rem, 1.6rem + 4.5vw, 4.8rem); }
.page-head p { margin-top: 14px; font-size: var(--step-1); color: var(--ink-soft); max-width: 46ch; }

.channel { padding-block: 40px; }
.channel + .channel { border-top: 2px solid var(--contour); }
.channel-head { display: flex; flex-wrap: wrap; align-items: baseline; gap: 6px 16px; }
.channel-head p { color: var(--ink-soft); }

.release { margin-top: 28px; background: #f2f5ec; border: 2px solid var(--ink); border-radius: 12px; padding: clamp(20px, 3vw, 32px); }
.release-top { display: flex; flex-wrap: wrap; justify-content: space-between; gap: 16px 24px; align-items: flex-start; }
.release h3 { font-size: clamp(1.7rem, 1.2rem + 1.6vw, 2.3rem); font-weight: 800; }
.release-date { margin-top: 6px; color: var(--ink-soft); font-size: var(--step--1); }
.release .button { white-space: nowrap; }
.release-facts { display: grid; grid-template-columns: max-content 1fr; gap: 6px 18px; margin: 22px 0 0; font-size: var(--step--1); }
.release-facts dt { color: var(--ink-soft); }
.release-facts dd { margin: 0; overflow-wrap: anywhere; }
.sha { font-family: ui-monospace, "SF Mono", Menlo, monospace; font-size: 0.8rem; }
.copy {
  margin-left: 8px; font: 600 0.75rem/1 var(--body); padding: 4px 8px; border-radius: 6px;
  border: 1px solid var(--ink-soft); background: transparent; color: var(--ink); cursor: pointer;
}
.copy:hover { background: var(--ink); color: #f2f5ec; }
.release h4 { margin: 26px 0 0; font: 700 var(--step-0)/1.2 var(--body); }
.release ul { margin: 8px 0 0; padding-left: 20px; max-width: 70ch; }
.release li { margin-top: 4px; }
.release li::marker { color: var(--signal); }
.empty { margin-top: 20px; padding: 22px; border: 2px dashed var(--contour); border-radius: 12px; color: var(--ink-soft); }

.steps { margin: 18px 0 0; padding-left: 0; list-style: none; counter-reset: step; max-width: 70ch; }
.steps li { counter-increment: step; position: relative; padding: 10px 0 10px 48px; }
.steps li::before {
  content: counter(step); position: absolute; left: 0; top: 8px;
  width: 32px; height: 32px; border-radius: 50%; background: var(--ink); color: var(--paper);
  font: 700 1rem/32px var(--display); text-align: center;
}
.steps code, .channel code { font-size: 0.85em; background: var(--paper-deep); padding: 2px 6px; border-radius: 4px; overflow-wrap: anywhere; }