/* RetroAudio marketing site. Same family look as RetroChat: warm paper, ink, coral, mustard, teal. */
:root {
  --ink: #1c1b22; --ink-2: #3a3843; --muted: #6e6875; --paper: #faf6ef; --paper-2: #f3ede2; --card: #fff;
  --line: #e8e0d3; --line-2: #dcd2c2; --coral: #e8553d; --coral-deep: #c9412a; --coral-ink: #c9412a; --mustard: #f2b544;
  --teal: #0f5c5c; --violet: #6a4fd8; --green: #1f9d63; --night: #1c1b22; --hard: #1c1b22;
  --display: 'Bricolage Grotesque', Inter, system-ui, sans-serif; --font: Inter, system-ui, -apple-system, 'Segoe UI', Roboto, sans-serif;
  --mono: 'JetBrains Mono', ui-monospace, Consolas, monospace; --max: 1200px; --gutter: 16px;
  color-scheme: light;
}
@media (prefers-color-scheme: dark) {
  :root { --ink: #f4efe6; --ink-2: #d8d2c8; --muted: #a39cab; --paper: #131218; --paper-2: #1a1920; --card: #1e1d25; --line: #2d2b35; --line-2: #3a3843; --coral-ink: #f4866f; --night: #0c0b10; --hard: #000; color-scheme: dark; }
}
@media (min-width: 720px) { :root { --gutter: 32px; } }
*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) { html { scroll-behavior: auto; } *, *::before, *::after { animation: none !important; transition: none !important; } }
body { margin: 0; background: var(--paper); color: var(--ink); font: 16px/1.6 var(--font); -webkit-font-smoothing: antialiased; overflow-x: clip; }
h1, h2, h3, p, ul, ol { margin: 0; }
ul, ol { padding: 0; list-style: none; }
a { color: inherit; }
img { display: block; }
section[id] { scroll-margin-top: 80px; }
:focus-visible { outline: 2px solid var(--coral); outline-offset: 3px; }
.wrap { width: min(100% - 2 * var(--gutter), var(--max)); margin-inline: auto; }
.skip { position: absolute; left: 12px; top: -60px; padding: 10px 14px; background: var(--ink); color: var(--paper); border-radius: 10px; z-index: 100; }
.skip:focus { top: 12px; }

/* type */
.h1 { font: 800 clamp(40px, 3.6vw + 22px, 74px)/0.98 var(--display); letter-spacing: -0.04em; text-wrap: balance; }
.h2 { font: 800 clamp(30px, 2.2vw + 20px, 52px)/1.03 var(--display); letter-spacing: -0.034em; text-wrap: balance; }
.lead { font-size: clamp(17px, 0.35vw + 15.6px, 20px); color: var(--ink-2); text-wrap: pretty; }
.lead--light { color: #cfc8d4; }
.eyebrow { font: 700 12.5px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--coral-ink); margin-bottom: 16px; }
.eyebrow--light { color: var(--mustard); }
.hl { position: relative; white-space: nowrap; background: linear-gradient(transparent 62%, rgba(242, 181, 68, 0.55) 62%); }
.head { max-width: 720px; display: grid; gap: 16px; margin-bottom: 44px; }
.head--center { margin-inline: auto; text-align: center; }

/* buttons */
.btn { display: inline-flex; align-items: center; justify-content: center; gap: 10px; min-height: 50px; padding: 0 24px; border-radius: 999px; border: 1.5px solid transparent; font: 600 16px/1 var(--font); text-decoration: none; cursor: pointer; white-space: nowrap; transition: transform 0.18s, box-shadow 0.18s, background 0.18s, color 0.18s, border-color 0.18s; }
.btn--sm { min-height: 40px; padding: 0 18px; font-size: 14.5px; }
.btn--primary { background: var(--ink); color: var(--paper); box-shadow: 3px 3px 0 var(--coral); }
.btn--primary:hover { transform: translate(-1px, -1px); box-shadow: 5px 5px 0 var(--coral); }
.btn--outline { background: var(--card); color: var(--ink); border-color: var(--ink); }
.btn--outline:hover { background: var(--ink); color: var(--paper); }
.btn--coral { background: var(--coral); color: #fff; box-shadow: 4px 4px 0 #000; }
.btn--coral:hover { transform: translate(-1px, -1px); box-shadow: 6px 6px 0 #000; }
.dot { width: 10px; height: 10px; border-radius: 50%; background: var(--coral); box-shadow: 0 0 0 4px rgba(232, 85, 61, 0.2); animation: pulse 1.6s ease-in-out infinite; }
@keyframes pulse { 50% { box-shadow: 0 0 0 7px rgba(232, 85, 61, 0.08); } }

/* nav */
.nav { position: sticky; top: 0; z-index: 50; background: rgba(250, 246, 239, 0.82); backdrop-filter: saturate(1.4) blur(12px); border-bottom: 1px solid transparent; transition: border-color 0.2s; }
@media (prefers-color-scheme: dark) { .nav { background: rgba(19, 18, 24, 0.8); } }
.nav.is-scrolled { border-bottom-color: var(--line); }
.nav__inner { display: flex; align-items: center; justify-content: space-between; gap: 20px; height: 68px; }
.brand { display: inline-flex; align-items: center; gap: 9px; text-decoration: none; font: 700 20px/1 var(--display); letter-spacing: -0.02em; }
.brand b { color: var(--coral); font-weight: 800; }
.nav__links { display: flex; gap: 28px; font-weight: 500; font-size: 15px; }
.nav__links a { text-decoration: none; color: var(--ink-2); }
.nav__links a:hover { color: var(--coral-ink); }
.nav__actions { display: flex; align-items: center; gap: 16px; }
.nav__signin { text-decoration: none; font-weight: 600; font-size: 15px; }
.burger { display: none; width: 42px; height: 42px; border: 1.5px solid var(--line-2); border-radius: 12px; background: var(--card); cursor: pointer; padding: 0; flex-direction: column; justify-content: center; align-items: center; gap: 5px; }
.burger span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; }
.menu { display: grid; gap: 4px; padding: 12px var(--gutter) 20px; border-bottom: 1px solid var(--line); background: var(--paper); }
.menu a:not(.btn) { padding: 12px 4px; text-decoration: none; font-weight: 600; border-bottom: 1px solid var(--line); }
.menu .btn { margin-top: 12px; }
@media (max-width: 900px) {
  .nav__links, .nav__signin { display: none; }
  .burger { display: inline-flex; }
  .nav__actions .btn { display: none; }
}

/* hero */
.hero { position: relative; padding: clamp(40px, 6vw, 88px) 0 clamp(60px, 7vw, 110px); }
.hero__bg { position: absolute; inset: 0; z-index: -1; background-image: radial-gradient(rgba(28, 27, 34, 0.12) 1px, transparent 1px); background-size: 22px 22px; mask-image: linear-gradient(to bottom, #000 30%, transparent 92%); }
@media (prefers-color-scheme: dark) { .hero__bg { background-image: radial-gradient(rgba(244, 239, 230, 0.07) 1px, transparent 1px); } }
.hero__grid { display: grid; grid-template-columns: 1.08fr 0.92fr; gap: clamp(32px, 5vw, 72px); align-items: center; }
.hero__copy { display: grid; gap: 24px; }
.tag { display: inline-flex; align-items: center; gap: 10px; width: fit-content; padding: 6px 14px 6px 6px; border-radius: 999px; background: var(--card); border: 1px solid var(--line); font-size: 14px; font-weight: 500; }
.tag span { background: var(--coral); color: #fff; font: 700 11px/1 var(--mono); letter-spacing: 0.08em; text-transform: uppercase; padding: 5px 9px; border-radius: 999px; }
.hero__cta { display: flex; gap: 14px; flex-wrap: wrap; }
.ticks { display: flex; flex-wrap: wrap; gap: 8px 22px; color: var(--muted); font-size: 14.5px; }
.ticks li::before { content: '✓'; color: var(--green); font-weight: 800; margin-right: 7px; }
.demo { background: var(--card); border: 1.5px solid var(--hard); border-radius: 26px; padding: clamp(22px, 3vw, 34px); box-shadow: 10px 10px 0 var(--mustard); display: grid; gap: 14px; font-family: Charter, 'Iowan Old Style', Georgia, serif; font-size: 17.5px; line-height: 1.65; transform: rotate(0.6deg); }
.demo__kicker { font: 700 12px/1 var(--mono); letter-spacing: 0.12em; text-transform: uppercase; color: var(--coral-ink); }
.demo__title { font: 800 clamp(24px, 1.4vw + 16px, 31px)/1.12 var(--display); letter-spacing: -0.025em; }
.demo [data-retroaudio-button] { min-height: 44px; }
.demo__hint { font: 14px/1.5 var(--font); color: var(--muted); padding-top: 4px; border-top: 1px dashed var(--line-2); }
@media (max-width: 960px) { .hero__grid { grid-template-columns: 1fr; } .demo { transform: none; } }

.strip { border-block: 1px solid var(--line); background: var(--paper-2); }
.strip__inner { display: flex; align-items: center; gap: 22px; padding: 18px 0; flex-wrap: wrap; }
.strip__inner > span { font: 700 12px/1 var(--mono); letter-spacing: 0.14em; text-transform: uppercase; color: var(--muted); }
.strip ul { display: flex; flex-wrap: wrap; gap: 10px 26px; font: 700 17px/1.2 var(--display); color: var(--ink-2); }

/* sections */
.section { padding: clamp(72px, 9vw, 128px) 0; }
.section--paper { background: var(--paper-2); }
.section--dark { background: var(--night); color: #faf6ef; }
.features { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.feature { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 26px; display: grid; gap: 10px; align-content: start; transition: transform 0.2s, box-shadow 0.2s; }
.feature:hover { transform: translateY(-3px); box-shadow: 0 18px 40px -22px rgba(28, 27, 34, 0.35); }
.feature h3 { font: 700 20px/1.22 var(--display); letter-spacing: -0.015em; }
.feature p { color: var(--ink-2); font-size: 15.5px; }
.feature--big { grid-column: span 2; grid-row: span 2; border: 1.5px solid var(--hard); box-shadow: 8px 8px 0 var(--coral); }
.feature--big h3 { font-size: 28px; }
.feature__icon { width: 46px; height: 46px; border-radius: 14px; display: grid; place-items: center; font: 800 19px/1 var(--display); color: #fff; }
.c-coral { background: var(--coral); } .c-teal { background: var(--teal); } .c-mustard { background: var(--mustard); color: #1c1b22; } .c-violet { background: var(--violet); }
.karaoke { margin-top: auto; padding-top: 18px; font: 800 clamp(24px, 2vw + 12px, 38px)/1.25 var(--display); letter-spacing: -0.02em; }
.karaoke span { border-radius: 8px; padding: 0 4px; animation: kara 3.6s steps(1) infinite; }
.karaoke span:nth-child(1) { animation-delay: 0s; } .karaoke span:nth-child(2) { animation-delay: 0.5s; } .karaoke span:nth-child(3) { animation-delay: 1s; } .karaoke span:nth-child(4) { animation-delay: 1.5s; } .karaoke span:nth-child(5) { animation-delay: 2s; } .karaoke span:nth-child(6) { animation-delay: 2.5s; } .karaoke span:nth-child(7) { animation-delay: 3s; }
@keyframes kara { 0% { background: rgba(242, 181, 68, 0.85); } 14% { background: rgba(242, 181, 68, 0.2); } 100% { background: rgba(242, 181, 68, 0.2); } }
@media (max-width: 960px) { .features { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .features { grid-template-columns: 1fr; } .feature--big { grid-column: auto; grid-row: auto; } }

.split { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: clamp(32px, 6vw, 90px); align-items: start; }
.split > div { display: grid; gap: 18px; position: sticky; top: 100px; }
@media (max-width: 900px) { .split { grid-template-columns: 1fr; } .split > div { position: static; } }
.tools { display: grid; gap: 14px; }
.tools li { display: grid; gap: 6px; padding: 22px 24px; border-radius: 20px; background: #2a2931; border: 1px solid rgba(250, 246, 239, 0.1); }
.tools b { font: 700 20px/1.2 var(--display); }
.tools span { color: #cfc8d4; }

.how { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; counter-reset: how; }
.how li { background: var(--card); border: 1px solid var(--line); border-radius: 22px; padding: 26px; display: grid; gap: 10px; align-content: start; }
.how__n { width: 40px; height: 40px; border-radius: 50%; display: grid; place-items: center; background: var(--ink); color: var(--paper); font: 800 18px/1 var(--display); }
.how h3 { font: 700 21px/1.2 var(--display); }
.how p { color: var(--ink-2); }
@media (max-width: 860px) { .how { grid-template-columns: 1fr; } }
.code { margin-top: 26px; background: #1c1b22; color: #faf6ef; border-radius: 16px; padding: 18px 22px; font: 14px/1.6 var(--mono); overflow-x: auto; white-space: nowrap; }

.compare { max-width: 880px; margin: 0 auto; background: var(--card); border: 1.5px solid var(--hard); border-radius: 22px; overflow: hidden; box-shadow: 8px 8px 0 var(--teal); }
.compare__row { display: grid; grid-template-columns: 1.1fr 1fr 1fr; gap: 12px; padding: 16px 22px; border-top: 1px solid var(--line); align-items: center; }
.compare__row--head { border-top: 0; font: 700 15px var(--display); background: var(--paper-2); }
.compare__row--head span:nth-child(2) { color: var(--coral-ink); }
.compare__row > span:first-child { font-weight: 600; }
.yes::before { content: '✓ '; color: var(--green); font-weight: 800; }
.no { color: var(--muted); }
@media (max-width: 640px) { .compare__row { grid-template-columns: 1fr 1fr; } .compare__row > span:first-child { grid-column: 1 / -1; } .compare__row--head > span:first-child { display: none; } }

.plans { display: grid; grid-template-columns: repeat(4, 1fr); gap: 18px; align-items: stretch; }
.plan { background: var(--card); border: 1px solid var(--line); border-radius: 24px; padding: 28px 24px; display: flex; flex-direction: column; gap: 12px; position: relative; }
.plan h3 { font: 700 22px var(--display); }
.plan__price { font: 800 44px/1 var(--display); letter-spacing: -0.04em; }
.plan__price small { font: 500 15px var(--font); color: var(--muted); letter-spacing: 0; }
.plan__note { color: var(--muted); font-size: 14px; margin-top: -6px; }
.plan ul { display: grid; gap: 9px; font-size: 15px; margin: 6px 0 18px; flex: 1; }
.plan li { padding-left: 24px; position: relative; }
.plan li::before { content: '✓'; position: absolute; left: 0; color: var(--green); font-weight: 800; }
.plan .btn { width: 100%; }
.plan--featured { border: 1.5px solid var(--hard); box-shadow: 8px 8px 0 var(--coral); }
.plan__badge { position: absolute; top: -13px; left: 24px; background: var(--coral); color: #fff; font: 700 11px/1 var(--mono); letter-spacing: 0.1em; text-transform: uppercase; padding: 7px 12px; border-radius: 999px; }
@media (max-width: 1080px) { .plans { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .plans { grid-template-columns: 1fr; } }

.faq { display: grid; grid-template-columns: 0.8fr 1.2fr; gap: clamp(28px, 5vw, 70px); }
.faq .head { margin: 0; }
.faq__list { display: grid; gap: 10px; }
.faq details { background: var(--card); border: 1px solid var(--line); border-radius: 16px; padding: 0 20px; }
.faq summary { cursor: pointer; padding: 18px 0; font: 700 18px/1.3 var(--display); list-style: none; display: flex; justify-content: space-between; gap: 12px; }
.faq summary::after { content: '+'; color: var(--coral); font-size: 24px; line-height: 1; }
.faq details[open] summary::after { content: '–'; }
.faq summary::-webkit-details-marker { display: none; }
.faq details p { padding: 0 0 18px; color: var(--ink-2); }
@media (max-width: 860px) { .faq { grid-template-columns: 1fr; } }

.cta { background: var(--night); color: #faf6ef; padding: clamp(70px, 8vw, 110px) 0; text-align: center; }
.cta__inner { display: grid; gap: 18px; justify-items: center; }

.foot { padding: 46px 0 30px; border-top: 1px solid var(--line); }
.foot__inner { display: flex; justify-content: space-between; gap: 30px; flex-wrap: wrap; }
.foot__inner > div { display: grid; gap: 12px; max-width: 380px; }
.foot__inner p { color: var(--muted); font-size: 14.5px; }
.foot nav { display: flex; flex-wrap: wrap; gap: 12px 24px; font-size: 14.5px; }
.foot nav a { text-decoration: none; color: var(--ink-2); }
.foot nav a:hover { color: var(--coral-ink); }
.foot__copy { color: var(--muted); font-size: 13px; margin-top: 28px; }

/* docs & legal */
.doc { display: grid; grid-template-columns: 230px 1fr; gap: 48px; padding: 40px 0 100px; }
.doc__toc { position: sticky; top: 90px; align-self: start; display: grid; gap: 4px; font-size: 14.5px; }
.doc__toc a { text-decoration: none; color: var(--ink-2); padding: 5px 10px; border-radius: 8px; }
.doc__toc a:hover { background: var(--paper-2); }
.doc__toc b { font: 700 12px var(--mono); letter-spacing: 0.1em; text-transform: uppercase; color: var(--muted); margin: 14px 10px 4px; }
.prose { min-width: 0; max-width: 780px; }
.prose h1 { font: 800 44px/1.05 var(--display); letter-spacing: -0.035em; margin-bottom: 14px; }
.prose h2 { font: 800 28px/1.15 var(--display); letter-spacing: -0.025em; margin: 52px 0 12px; scroll-margin-top: 90px; }
.prose h3 { font: 700 19px/1.3 var(--display); margin: 28px 0 8px; scroll-margin-top: 90px; }
.prose p, .prose ul, .prose ol, .prose pre, .prose table { margin: 0 0 14px; }
.prose ul, .prose ol { padding-left: 22px; list-style: revert; }
.prose li { margin: 4px 0; }
.prose a { color: var(--coral-ink); }
.prose code { font: 0.9em var(--mono); background: var(--paper-2); padding: 1px 6px; border-radius: 6px; }
.prose pre { background: #1c1b22; color: #faf6ef; padding: 16px 18px; border-radius: 14px; overflow-x: auto; font: 13.5px/1.6 var(--mono); }
.prose pre code { background: none; padding: 0; color: inherit; }
.prose table { width: 100%; border-collapse: collapse; font-size: 14.5px; display: block; overflow-x: auto; }
.prose th, .prose td { text-align: left; padding: 9px 10px; border-bottom: 1px solid var(--line); vertical-align: top; }
.prose th { font-size: 12px; text-transform: uppercase; letter-spacing: 0.06em; color: var(--muted); }
.prose .note { background: var(--card); border: 1px solid var(--line); border-left: 4px solid var(--coral); padding: 12px 16px; border-radius: 10px; }
.prose .meta { color: var(--muted); font-size: 14px; margin-bottom: 26px; }
@media (max-width: 860px) { .doc { grid-template-columns: 1fr; gap: 10px; } .doc__toc { position: static; display: flex; flex-wrap: wrap; } .doc__toc b { width: 100%; } .prose h1 { font-size: 34px; } }
.legal { max-width: 760px; padding: 40px 0 100px; }
.menu[hidden] { display: none; }
@media (min-width: 901px) { .menu { display: none !important; } }
.faq { align-items: start; }
.faq .head { position: sticky; top: 100px; }
@media (max-width: 860px) { .faq .head { position: static; } }