/* The colors are the app's own (CampfireColorScheme.kt in the app's repository): a lavender paper in the light scheme,
   a violet night in the dark one, purple for the interface and orange for the chords. */

@font-face { font-family: Inter; src: url("fonts/inter_regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: Inter; src: url("fonts/inter_bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains_mono_regular.ttf") format("truetype"); font-weight: 400; font-display: swap; }
@font-face { font-family: "JetBrains Mono"; src: url("fonts/jetbrains_mono_bold.ttf") format("truetype"); font-weight: 700; font-display: swap; }

:root {
	color-scheme: light dark;
	--background: #FAF8FE;
	--on-background: #1D1A23;
	--muted: #494456;
	--primary: #5A49CA;
	--on-primary: #FFFFFF;
	--primary-container: #E7DEFE;
	--on-primary-container: #573190;
	--container-low: #F5F2FB;
	--container: #EFEDF5;
	--container-high: #E9E7F0;
	--outline: #7A7488;
	--outline-variant: #C9C3D9;
	--chord: #A04F03;
	--sans: Inter, system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
	--mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
	:root {
		--background: #15121C;
		--on-background: #E3E1EA;
		--muted: #C9C3D9;
		--primary: #D0BCFF;
		--on-primary: #3D2068;
		--primary-container: #573190;
		--on-primary-container: #E7DEFE;
		--container-low: #1D1A25;
		--container: #211E29;
		--container-high: #2C2834;
		--outline: #938EA2;
		--outline-variant: #494456;
		--chord: #FE851E;
	}
	/* The dark bezels need a lighter rim to stand out from the night background. */
	.tablet, .phone, .laptop { --rim: #4A4655; --shadow: rgb(0 0 0 / 0.6); }
	.stage::before { opacity: 0.32; }
}

* { box-sizing: border-box; }
/* Touch screens get feedback of their own while pressed instead of the browser's gray tap overlay. Hover effects only
   apply to precise pointers, as a tap would otherwise leave them stuck on until the next tap elsewhere. A press shows
   at once, as a quick tap would be over before a transition got anywhere, and fades out on release. */
html { -webkit-text-size-adjust: 100%; -webkit-tap-highlight-color: transparent; }
body { margin: 0; background: var(--background); color: var(--on-background); font: 16px/1.6 var(--sans); }
img { max-width: 100%; height: auto; display: block; }
a { color: var(--primary); text-underline-offset: 3px; }
a, button { transition: opacity 0.2s, background-color 0.2s, color 0.2s, border-color 0.2s, box-shadow 0.2s, filter 0.2s, transform 0.2s; }
@media (hover: none) {
	a:active, button:active { transition-duration: 0s; }
	/* Plain links, the brand among them, fade while pressed. */
	a:not(.button, .platforms a, .site-header nav a):active { opacity: 0.55; }
}
a:focus-visible, button:focus-visible { outline: 2px solid var(--primary); outline-offset: 3px; border-radius: 4px; }
h1, h2, h3 { line-height: 1.2; letter-spacing: -0.02em; }
code, kbd { font-family: var(--mono); font-size: 0.9em; }

.skip { position: absolute; left: 16px; top: -60px; padding: 8px 14px; background: var(--primary); color: var(--on-primary); border-radius: 8px; z-index: 2; }
.skip:focus { top: 12px; }

.wrap { max-width: 1080px; margin: 0 auto; padding: 0 24px; }

/* Header and footer */

/* A link to a section stops with the section's heading 32px under the sticky header (72px and its 1px border),
   rather than with the empty space that separates it from the previous section. */
html { scroll-padding-top: 73px; }
.site-header { position: sticky; top: 0; z-index: 1; background: color-mix(in srgb, var(--background) 88%, transparent); -webkit-backdrop-filter: blur(12px); backdrop-filter: blur(12px); border-bottom: 1px solid color-mix(in srgb, var(--outline-variant) 50%, transparent); }
.site-header .wrap { display: flex; align-items: center; justify-content: space-between; gap: 16px; height: 72px; }
.brand { display: inline-flex; align-items: center; gap: 10px; color: inherit; text-decoration: none; font-weight: 700; font-size: 20px; letter-spacing: -0.01em; }
.brand img { width: 32px; height: 32px; }
.site-header nav { display: flex; align-items: center; gap: 4px; }
.site-header nav a:not(.button) { color: var(--muted); text-decoration: none; font-size: 15px; padding: 8px 12px; border-radius: 20px; }
@media (hover: hover) and (pointer: fine) { .site-header nav a:not(.button):hover { background: var(--container); color: var(--on-background); } }
@media (hover: none) { .site-header nav a:not(.button):active { background: color-mix(in srgb, var(--on-background) 12%, transparent); color: var(--on-background); } }
.site-header nav a[aria-current] { color: var(--on-background); font-weight: 700; }

.site-footer { margin-top: 72px; padding-bottom: 32px; }
.coffee { display: flex; align-items: center; justify-content: space-between; gap: 24px 48px; padding: 32px 40px; border-radius: 20px; background: var(--primary-container); color: var(--on-primary-container); }
.coffee h2 { font-size: 24px; margin: 0 0 8px; }
.coffee p { margin: 0; max-width: 40em; }
.coffee .button { gap: 10px; min-height: 48px; padding: 0 28px; font-size: 16px; }
.coffee .button svg { width: 22px; height: 22px; fill: none; stroke: currentColor; stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; }
.legal { display: flex; flex-wrap: wrap; gap: 8px 32px; justify-content: space-between; margin-top: 32px; color: var(--muted); font-size: 14px; }
.legal p { margin: 0; }
.legal nav { display: flex; flex-wrap: wrap; align-items: center; gap: 8px 24px; }
.legal .source { display: inline-flex; align-items: center; gap: 8px; }
.legal .source svg { width: 16px; height: 16px; fill: currentColor; }
.legal a { color: inherit; }
/* Without the coffee box above it (on the privacy policy and support pages), a line separates it from the page. */
.legal:first-child { margin-top: 0; padding-top: 32px; border-top: 1px solid var(--outline-variant); }

/* Buttons, shaped like the app's Material 3 ones */

.button { display: inline-flex; align-items: center; justify-content: center; min-height: 40px; padding: 0 24px; border-radius: 20px; font-weight: 700; font-size: 15px; text-decoration: none; background: var(--primary); color: var(--on-primary); white-space: nowrap; }
@media (hover: hover) and (pointer: fine) { .button:hover { filter: brightness(1.08); } }
/* Pressed, a button shrinks a little under a layer of its own text color, as the app's Material 3 buttons get one. */
@media (hover: none) { .button:active { box-shadow: inset 0 0 0 100vmax color-mix(in srgb, currentColor 18%, transparent); transform: scale(0.96); } }
.button.tonal { background: var(--primary-container); color: var(--on-primary-container); }
.button.small { min-height: 36px; padding: 0 16px; font-size: 14px; }

/* Home page */

.hero { display: grid; grid-template-columns: 5fr 6fr; gap: 48px; align-items: center; padding: 64px 0 56px; }
.hero h1 { font-size: clamp(36px, 5vw, 52px); margin: 0 0 20px; }
.hero p { font-size: 18px; color: var(--muted); margin: 0 0 28px; max-width: 30em; }
.hero .actions { display: flex; flex-wrap: wrap; gap: 12px; }

/* The screenshots sit in device frames drawn in CSS. Every measurement of a frame is a share of its width (cqw), so
   that a frame keeps its proportions at any size. The bezels are dark in both color schemes, as the devices are. */
.tablet, .phone, .laptop { container-type: inline-size; --bezel: #1D1B20; --rim: #3A3740; --shadow: rgb(29 26 35 / 0.4); }
.frame, .laptop .lid { position: relative; background: var(--bezel); box-shadow: 0 0 0 1px var(--rim), inset 0 0 0 1px rgb(255 255 255 / 0.06), 0 28px 48px -24px var(--shadow); }
.screen { display: block; overflow: hidden; background: var(--background); }
.screen img { width: 100%; }
.tablet .frame { padding: 2.4cqw; border-radius: 4cqw; }
.tablet .screen { border-radius: 1.6cqw; }
/* The front camera, in the middle of the long edge as it is on an iPad held sideways */
.tablet .frame::before { content: ""; position: absolute; top: 0.85cqw; left: 50%; width: 0.7cqw; height: 0.7cqw; margin-left: -0.35cqw; border-radius: 50%; background: #34323A; }
.phone .frame { padding: 3cqw; border-radius: 14.75cqw; }
.phone .screen { position: relative; container-type: inline-size; border-radius: 11.75cqw; }
/* The Dynamic Island, where the iPhone draws it: the screenshots leave its place empty (all but one, which it covers). */
.phone .screen::after { content: ""; position: absolute; top: 3.2cqw; left: 35.8cqw; width: 28.4cqw; height: 8.3cqw; border-radius: 4.2cqw; background: #000; }
/* The side button on the right and the volume buttons on the left */
.phone .frame::before, .phone .frame::after { content: ""; position: absolute; width: 1.2cqw; background: var(--rim); }
.phone .frame::before { right: -1.2cqw; top: 26%; height: 11%; border-radius: 0 1cqw 1cqw 0; }
.phone .frame::after { left: -1.2cqw; top: 20%; height: 14%; border-radius: 1cqw 0 0 1cqw; }
.laptop { min-width: 0; }
.laptop .lid { width: 86%; margin: 0 auto; padding: 1.2cqw 1.2cqw 1.8cqw; border-radius: 2.4cqw 2.4cqw 0 0; }
.laptop .screen { border-radius: 0.8cqw 0.8cqw 0 0; }
.laptop .base { position: relative; height: 1.8cqw; border-radius: 0 0 2cqw 2cqw / 0 0 1.4cqw 1.4cqw; background: linear-gradient(#4A474F, #2A282E 45%, #18171B); box-shadow: 0 0 0 1px var(--rim), 0 24px 32px -20px var(--shadow); }
/* The groove that lifts the lid */
.laptop .base::before { content: ""; position: absolute; top: 0; left: 43%; width: 14%; height: 40%; border-radius: 0 0 1cqw 1cqw; background: #1D1B20; }

/* A tablet and a phone, tilted towards each other, over a glow in the colors of the app icon */
.stage { position: relative; aspect-ratio: 1.1; isolation: isolate; }
.stage::before { content: ""; position: absolute; inset: 8% 4% 4% 10%; z-index: -1; border-radius: 50%; background: linear-gradient(135deg, #5A49CA, #F57C00); opacity: 0.28; filter: blur(56px); }
.stage .tablet { position: absolute; top: 12%; left: 0; width: 86%; transform: rotate(-6deg); }
.stage .phone { position: absolute; top: 28%; right: 1%; width: 27%; transform: rotate(6deg); }

section { padding-top: 96px; scroll-margin-top: -64px; }
section > h2, .split h2 { font-size: clamp(28px, 3.4vw, 36px); margin: 0 0 16px; max-width: 22em; }

/* Text next to a picture rather than above it. The sections take turns: the text is on the left in one and on the
   right in the next, while it always comes first for screen readers and on phones. */
.split { display: grid; grid-template-columns: 2fr 3fr; gap: 48px; align-items: center; }
.split.reverse { grid-template-columns: 3fr 2fr; }
.split.reverse > :first-child { order: 1; }
.split .lead { margin-bottom: 16px; }
.split .lead:last-child { margin-bottom: 0; }
.lead { font-size: 18px; color: var(--muted); max-width: 40em; margin: 0 0 40px; }

/* What Campfire is about, right under the hero */

.highlights { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px 32px; margin: 0; padding: 32px 0 0; list-style: none; border-top: 1px solid var(--outline-variant); }
.highlights svg { display: block; width: 28px; height: 28px; margin-bottom: 12px; color: var(--primary); fill: none; stroke: currentColor; stroke-width: 1.75; stroke-linecap: round; stroke-linejoin: round; }
.highlights circle { fill: currentColor; stroke: none; }
.highlights h2 { font-size: 18px; margin: 0 0 4px; }
.highlights p { color: var(--muted); margin: 0; }

/* The ChordPro example: the file on one side, the page Campfire makes of it on the other */

.chordpro { display: grid; grid-template-columns: 1fr 1fr; border: 1px solid var(--outline-variant); border-radius: 20px; overflow: hidden; }
.chordpro > div { padding: 16px 24px 20px; min-width: 0; }
.chordpro .source { background: var(--container-low); border-right: 1px solid var(--outline-variant); }
.chordpro .label { display: flex; align-items: center; justify-content: space-between; gap: 12px; min-height: 36px; margin-bottom: 12px; font-size: 13px; font-weight: 700; color: var(--muted); }
.chordpro pre { margin: 0; font: 14px/1.7 var(--mono); white-space: pre-wrap; overflow-wrap: anywhere; }
.chordpro pre .directive { color: var(--primary); }
.chordpro pre .chord { color: var(--chord); }
.song-title { font-weight: 700; font-size: 16px; margin: 0; }
.song-artist { color: var(--muted); font-size: 14px; margin: 0 0 12px; }
.chip { display: inline-block; padding: 2px 12px; border-radius: 8px; background: var(--container-high); font-size: 13px; margin-bottom: 8px; }
.sheet { font-size: 15px; }
.sheet .line { display: flex; flex-wrap: wrap; margin-bottom: 4px; }
.sheet .segment { display: inline-flex; flex-direction: column; white-space: pre; }
.sheet .segment b { color: var(--chord); font-weight: 700; padding-right: 0.6ch; }
/* A zero-width space gives an empty chord a line of its own, so the words under it line up with the rest. */
.sheet .segment b:empty::before { content: "\200B"; }
.transpose { display: inline-flex; align-items: center; background: var(--container-high); border-radius: 18px; font-weight: 400; color: var(--on-background); }
.transpose button { width: 36px; height: 36px; border: 0; border-radius: 18px; background: none; color: inherit; font: inherit; font-size: 18px; cursor: pointer; }
@media (hover: hover) and (pointer: fine) { .transpose button:hover { background: color-mix(in srgb, var(--on-background) 8%, transparent); } }
.transpose button:active { background: color-mix(in srgb, var(--on-background) 12%, transparent); }
@media (hover: none) { .transpose button:active { background: color-mix(in srgb, var(--on-background) 18%, transparent); } }
.transpose button.reset { width: auto; min-width: 7ch; padding: 0 6px; font-size: inherit; font-variant-numeric: tabular-nums; }

/* A row of phones, each with a caption. On narrow screens it scrolls sideways instead of wrapping. */

.tour { display: grid; grid-template-columns: repeat(4, 1fr); gap: 32px; }
.tour figure { margin: 0; min-width: 0; }
.tour .phone { width: 88%; max-width: 240px; margin: 0 auto 24px; }
.tour figcaption { max-width: 240px; margin: 0 auto; color: var(--muted); font-size: 15px; }
.tour strong { display: block; color: var(--on-background); font-size: 16px; margin-bottom: 2px; }

/* Download links, one card per platform with the logo of its store: phones and tablets in the first row, computers in the
   second */

.platforms { display: grid; grid-template-columns: repeat(3, 1fr); gap: 12px; }
.platforms > * { display: flex; align-items: center; gap: 16px; min-height: 80px; padding: 16px 20px; border-radius: 16px; background: var(--container-low); border: 1px solid var(--outline-variant); color: var(--on-background); text-decoration: none; font-size: 14px; line-height: 1.4; }
.platforms svg, .platforms img { flex-shrink: 0; width: 40px; height: 40px; }
.platforms .github { fill: currentColor; }
.platforms span { color: var(--muted); }
.platforms strong { display: block; color: var(--on-background); font-size: 16px; }
.platforms a::after { content: "↗"; content: "↗" / ""; margin-left: auto; color: var(--muted); font-size: 18px; }
@media (hover: hover) and (pointer: fine) { .platforms a:hover { background: color-mix(in srgb, var(--primary) 8%, var(--container-low)); border-color: var(--outline); } }
@media (hover: none) { .platforms a:active { background: color-mix(in srgb, var(--primary) 18%, var(--container-low)); border-color: var(--primary); transform: scale(0.98); } }
.platforms a:focus-visible { outline-offset: 3px; border-radius: 16px; }
/* Not out yet: shown so the platform isn't missing, but without a link. */
.platforms .soon { background: none; border-style: dashed; }
.platforms .soon svg { opacity: 0.6; }
.platforms .soon .chip { flex-shrink: 0; margin: 0 0 0 auto; color: var(--on-background); }

/* Privacy policy, support and the 404 page */

.document { max-width: 720px; padding: 48px 0 0; }
.document h1 { font-size: clamp(32px, 4.4vw, 44px); margin: 0 0 24px; }
.document h2 { font-size: 24px; margin: 48px 0 12px; }
.document h3 { font-size: 18px; margin: 32px 0 8px; }
.document p, .document li { color: var(--muted); }
.document strong { color: var(--on-background); }
.document li { margin-bottom: 10px; }
.document .updated { font-size: 14px; }
.document .contact { background: var(--container); border-radius: 20px; padding: 24px; margin: 32px 0; }
.document .contact h2 { margin-top: 0; }
.document .contact p:last-child { margin-bottom: 0; }

@media (max-width: 860px) {
	.hero, .split, .split.reverse { grid-template-columns: 1fr; gap: 32px; }
	.split.reverse > :first-child { order: 0; }
	.chordpro { grid-template-columns: 1fr; }
	.chordpro .source { border-right: 0; border-bottom: 1px solid var(--outline-variant); }
	.hero { padding-top: 24px; }
	.stage { width: 100%; max-width: 560px; margin: 0 auto; }
	section { padding-top: 72px; scroll-margin-top: -40px; }
	.highlights { grid-template-columns: 1fr 1fr; }
	.platforms { grid-template-columns: 1fr 1fr; }
	.tour { grid-template-columns: none; grid-auto-flow: column; grid-auto-columns: 42%; gap: 24px; overflow-x: auto; scroll-snap-type: x mandatory; scrollbar-width: none; margin: 0 -24px; padding: 0 24px; scroll-padding: 0 24px; }
	.tour::-webkit-scrollbar { display: none; }
	.tour figure { scroll-snap-align: start; }
	.coffee { flex-direction: column; align-items: flex-start; padding: 28px; }
}

@media (max-width: 600px) {
	.wrap { padding: 0 16px; }
	.site-header nav a.optional { display: none; }
	.hero p, .lead { font-size: 17px; }
	.platforms { grid-template-columns: 1fr; }
	.highlights { gap: 24px 16px; }
	.highlights h2 { font-size: 16px; }
	.highlights p { font-size: 15px; }
	.tour { grid-auto-columns: 62%; margin: 0 -16px; padding: 0 16px; scroll-padding: 0 16px; }
	.coffee { padding: 24px; }
	.chordpro > div { padding: 16px; }
	.chordpro pre { font-size: 13px; }
	.sheet { font-size: 14px; }
}