/* Voice Truyện — Một khoảng trời để nghe. Shared static-site design system. */
:root{--bg:#f7f2e8;--bg-alt:#eee6d8;--card:#fffaf2;--text:#29251f;--muted:#72685e;--line:#dcd2c3;--accent:#a6470f;--on-accent:#fffaf2;--brand-1:#ffa65c;--brand-2:#e0641a;--glow:rgba(224,100,26,.18);--font:-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;--serif:"Iowan Old Style","Palatino Linotype",Georgia,serif;--ease:cubic-bezier(.22,.8,.24,1)}

@media(prefers-color-scheme:dark){:root{--bg:#171714;--bg-alt:#22221d;--card:#282820;--text:#f4eddf;--muted:#b5ac9c;--line:#3e3a30;--accent:#ffac69;--on-accent:#24190f;--glow:rgba(255,158,77,.16)}
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:96px;-webkit-text-size-adjust:100%}
body{margin:0;background:var(--bg);color:var(--text);font:17px/1.65 var(--font);-webkit-font-smoothing:antialiased}
button,a{-webkit-tap-highlight-color:transparent}
button{font:inherit}
img,svg{display:block;max-width:100%}
a{color:var(--accent);text-decoration:none}
a:hover{text-decoration:underline}
button{cursor:pointer}
p{margin:0 0 18px}
h1,h2,h3{margin:0;letter-spacing:-.045em;line-height:1.12;font-weight:500}
h1{font-size:clamp(44px,5.9vw,84px)}
h2{font-size:clamp(34px,4vw,56px)}
h3{font-size:25px;line-height:1.25;letter-spacing:-.025em}
em{font:italic 1.05em var(--serif);color:var(--accent);letter-spacing:-.045em}
::selection{background:#e0641a;color:white}
:focus-visible{outline:3px solid var(--accent);outline-offset:5px;border-radius:4px}
.wrap{width:min(1240px,100%);margin:auto;padding:0 48px}
.narrow{max-width:820px}
.skip{position:fixed;left:16px;top:-100px;z-index:100;background:var(--card);padding:12px}
.skip:focus{top:12px}
.eyebrow{font-size:11px;letter-spacing:.13em;font-weight:650;color:var(--accent);margin:0 0 24px;line-height:1.7}
.lead{color:var(--muted);font-size:clamp(18px,1.65vw,21px);max-width:560px;line-height:1.65;margin:24px 0}
.text-link{display:inline-flex;align-items:center;gap:16px;font-size:14px;font-weight:600;padding:10px 0;border-bottom:1px solid var(--line);color:var(--text)}
.text-link:hover{text-decoration:none;border-color:var(--accent)}

.nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 92%,transparent);backdrop-filter:blur(18px);border-bottom:1px solid var(--line)}
.nav .wrap{height:82px;display:flex;align-items:center;gap:36px}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);font-size:18px;letter-spacing:-.035em;font-weight:650;white-space:nowrap}
.brand:hover{text-decoration:none}
.brand img{width:30px;border-radius:8px}
.nav ul{display:flex;gap:28px;list-style:none;margin:0 0 0 auto;padding:0;font-size:13px}
.nav ul a{color:var(--muted);padding:10px 0}
.nav ul a:hover,.nav ul a[aria-current]{color:var(--accent);text-decoration:none}
.nav ul a[aria-current]{border-bottom:1px solid var(--accent)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:24px;border:1px solid transparent;border-radius:999px;background:var(--accent);color:var(--on-accent);font:600 14px/1.3 var(--font);padding:17px 25px;transition:background .2s,transform .2s}
.btn:hover{text-decoration:none;transform:translateY(-2px);filter:brightness(1.07)}
.btn:active{transform:translateY(0)}
.nav .btn{font-size:12px;padding:12px 20px;white-space:nowrap}
.menu-toggle{display:none;background:none;color:var(--text);border:1px solid var(--line);border-radius:99px;padding:8px 14px}
.btn.soon{background:var(--card);border-color:var(--line);color:var(--muted);cursor:default}
.btn.soon:hover{transform:none;filter:none}
.btn small{font-weight:400}
.btn svg{width:19px;height:19px;flex-shrink:0}
.cta-row{display:flex;flex-wrap:wrap;gap:12px;justify-content:center;margin:28px 0 0}
.status-dot{display:inline-block;width:6px;height:6px;background:var(--accent);border-radius:50%;vertical-align:middle;margin-right:7px}

.hero{position:relative;padding:48px 0 0;overflow:clip}
.hero-grid{display:grid;grid-template-columns:1.1fr 1fr;gap:28px;align-items:center;min-height:660px}
.hero-copy{position:relative;z-index:2;padding:24px 0 40px}
.hero-copy h1{font-size:clamp(48px,5.8vw,82px)}
.hero-copy .lead{max-width:430px}
.hero-actions{display:flex;gap:20px;flex-wrap:wrap;align-items:center;margin-top:34px}
.hero-actions .btn{font-size:13px}
.hero-note{font-size:11px;color:var(--muted);margin:24px 0 0}
.hero-note span{padding:0 7px}
.hero-art{--scene-bleed:0px;position:relative;min-width:0;height:640px;display:grid;place-items:center;isolation:isolate}
.sound-orbit{position:absolute;inset:0 calc(-1 * var(--scene-bleed));z-index:-1;pointer-events:none;background:radial-gradient(ellipse at center,var(--glow),transparent 65%)}
.orbit-ring{position:absolute;width:74%;aspect-ratio:1.7;border:1px solid color-mix(in srgb,var(--accent) 35%,transparent);border-radius:50%;left:50%;top:50%;transform:translate(-50%,-50%) rotate(-32deg)}
.orbit-ring.second{width:78%;aspect-ratio:2.2;transform:translate(-50%,-50%) rotate(25deg);border-style:dashed}
.orbit-label{position:absolute;bottom:55px;right:var(--scene-bleed);font-size:9px;letter-spacing:.18em;color:var(--muted)}
#sound-scene{position:absolute;inset:0 calc(-1 * var(--scene-bleed));width:calc(100% + 2 * var(--scene-bleed));height:100%;z-index:-1;pointer-events:none}
.hero-art.scene-ready .orbit-ring{opacity:.2}
@media(min-width:1024px){.hero-art{--scene-bleed:48px}}
.hero-phone{transform:rotate(-7deg);padding:15px}
.phone{position:relative;width:min(278px,72vw);margin:auto;border-radius:44px;padding:8px;background:linear-gradient(140deg,#5d574e,#1c1b19);box-shadow:0 0 0 1px #8a8173 inset,0 28px 60px -20px #21160955}
.phone img,.phone picture{display:block;width:100%;height:auto;border-radius:36px}
.hero-phone .phone{width:252px}
.floating-note{position:absolute;right:-5px;bottom:140px;padding:16px 20px;background:var(--card);border:1px solid var(--line);border-radius:14px;display:flex;gap:15px;align-items:center;box-shadow:0 15px 30px #2c190b12;transform:rotate(4deg);font-size:13px}
.floating-note small{display:block;color:var(--muted);font-size:11px}
.mini-wave{color:var(--accent);white-space:nowrap}
.art-caption{position:absolute;bottom:14px;left:22px;color:var(--muted);font-size:9px;letter-spacing:.13em}
.hero-bottom{display:flex;justify-content:space-between;gap:20px;border-bottom:1px solid var(--line);padding-top:26px;padding-bottom:26px;font-size:11px;color:var(--muted)}
.hero-bottom a{color:var(--text)}

section{padding:112px 0}
.alt{background:var(--bg-alt)}
.split{display:grid;grid-template-columns:1fr 1fr;gap:80px;align-items:center}
.section-heading{display:flex;align-items:flex-end;justify-content:space-between;gap:40px;margin-bottom:56px}
.section-heading .lead{margin:0}
.sec-head{text-align:center;margin-bottom:48px}
.sec-head p{color:var(--muted);max-width:620px;margin:20px auto 0}
.grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(min(260px,100%),1fr));gap:20px}
.card{position:relative;background:var(--card);border:1px solid var(--line);border-radius:22px;padding:32px}
.card p,.step p{color:var(--muted);font-size:15px;margin:14px 0 0}
.card.hl{border-color:var(--accent);background:color-mix(in srgb,var(--accent) 6%,var(--card))}
.tag{display:inline-block;padding:5px 10px;border:1px solid var(--line);border-radius:99px;font-size:10px;color:var(--muted);letter-spacing:.08em;text-transform:uppercase;margin-bottom:18px}
.tag.pro{border-color:var(--accent);color:var(--accent)}
.steps-grid{display:grid;grid-template-columns:repeat(3,1fr);border-top:1px solid var(--line);border-bottom:1px solid var(--line)}
.step{padding:30px 26px 36px 0}
.step+.step{border-left:1px solid var(--line);padding-left:26px}
.step-number{display:block;font:italic 42px var(--serif);color:var(--accent);margin-bottom:36px}
.step-format{display:block;color:var(--accent);font-size:9px;letter-spacing:.06em;margin-top:32px}
.benefit-layout{display:grid;grid-template-columns:1fr 1fr;gap:64px;align-items:center}
.benefit-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.benefit-grid .wide{grid-column:span 2}
.benefit-grid h3{font-size:21px}
.line-icon{color:var(--accent);font-size:40px;line-height:1;display:block;margin-bottom:24px}
/* Illustrative waveforms, not recorded audio or a quality scale. */
.voice-visual{margin:6px 0 28px}
.voice-wave{width:100%;height:auto;display:block;color:var(--accent);overflow:visible}
.voice-wave-guide{fill:none;stroke:var(--line);stroke-width:1;opacity:.55;vector-effect:non-scaling-stroke}
.voice-wave-path{fill:none;stroke:currentColor;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;vector-effect:non-scaling-stroke}
.voice-wave-dot{fill:currentColor;opacity:0;pointer-events:none}
.voice-dot-halo{opacity:.16}
.voice-visual figcaption{font-size:12px;color:var(--accent);margin-top:12px;letter-spacing:.015em}
.voice-visual-note{font-size:12px;color:var(--muted);margin:20px 0 0;text-align:center}
.card-foot{display:block;border-top:1px solid var(--line);padding-top:18px;margin-top:32px;font-size:10px;letter-spacing:.09em;color:var(--muted)}

.listening-section{padding-bottom:24px}
.reader-demo{padding:32px;background:var(--card);border:1px solid var(--line);border-radius:22px;box-shadow:0 20px 60px #26160708}
.demo-top,.demo-bottom{display:flex;align-items:center;justify-content:space-between;gap:12px;color:var(--muted);font-size:10px}
.demo-top{letter-spacing:.06em;border-bottom:1px solid var(--line);padding-bottom:18px}
.demo-muted{font:italic 24px var(--serif);color:var(--muted);opacity:.5;margin:36px 0 16px}
.lyric p{font:26px/1.8 var(--serif);margin:0;min-height:190px}
.lyric .w{color:var(--muted);transition:color .18s}
.lyric .w.on{color:var(--text)}
.lyric .w.now{color:var(--accent)}
.demo-bottom{margin-top:32px;border-top:1px solid var(--line);padding-top:18px;flex-wrap:wrap}
.demo-toggle{border:0;background:none;color:var(--accent);font-size:10px;text-decoration:underline;padding:8px 0}
.wave{display:flex;gap:3px;height:26px;align-items:center}
.wave i{width:3px;height:12px;border-radius:3px;background:var(--accent);animation:breathe 1s ease-in-out infinite alternate}
.wave i:nth-child(2n){height:24px;animation-delay:-.4s}
.wave i:nth-child(3){height:18px;animation-delay:-.7s}
.demo-paused .wave i{animation-play-state:paused}
@keyframes breathe{to{transform:scaleY(.4)}
}

.cta{text-align:center;background:var(--bg-alt);border:1px solid var(--line);border-radius:30px;padding:80px 24px;position:relative;overflow:hidden}
.cta:before{content:"";position:absolute;inset:0;background:radial-gradient(ellipse at 50% 100%,var(--glow),transparent 65%);pointer-events:none}
.cta>*{position:relative}
.cta h2{font-size:clamp(38px,5vw,66px)}
.cta>p:not(.eyebrow){margin:24px 0 0;color:var(--muted)}
.cta .download-note{font-size:11px}
.page-head{padding:92px 0 44px;text-align:center;border-bottom:1px solid var(--line);background:radial-gradient(ellipse at 50% 0,var(--glow),transparent 70%)}
.page-head h1{font-size:clamp(42px,5.5vw,72px)}
.page-head .lead{margin:24px auto 0}
.checks{padding:0;list-style:none;margin:24px 0 0}
.checks li{position:relative;padding:9px 0 9px 26px;font-size:15px;color:var(--muted)}
.checks li:before{content:"✓";position:absolute;left:0;color:var(--accent)}
.checks .tag{margin:0 0 0 6px}
.pricing-grid{grid-template-columns:1fr 1fr;gap:28px}
.pricing-grid .card{padding:40px}
.plan-title{font-size:25px;letter-spacing:-.03em}
.price{font-size:clamp(36px,4vw,54px);letter-spacing:-.045em;font-weight:550;margin:32px 0 14px;line-height:1.2}
.price small{font-size:15px;letter-spacing:0;font-weight:400;color:var(--muted)}
.note{font-size:13px;color:var(--muted)}
details{border-bottom:1px solid var(--line);padding:22px 0}
summary{position:relative;cursor:pointer;font-weight:550;font-size:17px;list-style:none;padding-right:36px}
summary::-webkit-details-marker{display:none}
summary:after{content:"＋";position:absolute;right:0;top:0;color:var(--accent);font-weight:400;font-size:22px}
details[open] summary:after{content:"−"}
details p{color:var(--muted);font-size:15px;margin:16px 30px 0 0}
.faq-heading{font-size:22px;margin:40px 0 14px}
.faq-heading:first-child{margin-top:0}

.journey-section{padding:64px 0;background:var(--bg-alt)}
.journey{position:relative}
.journey-stage{display:none;isolation:isolate}
.journey-scene{display:grid;grid-template-columns:1fr 1fr;align-items:center;gap:64px;padding:56px 0}
.stage-halo{position:absolute;z-index:-2;pointer-events:none;inset:12% 0;border:1px solid var(--line);border-radius:50%;background:radial-gradient(ellipse,var(--glow),transparent 65%)}
#journey-scene-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:-1;pointer-events:none}
.journey-stage.scene-ready .stage-halo{border-color:transparent}
.stage-label{position:absolute;top:0;left:0;right:0;text-align:center;font-size:9px;letter-spacing:.17em;color:var(--muted)}
.journey-shot{position:absolute;inset:36px 0 28px;display:grid;place-items:center}
.journey-shot .phone{width:240px}
.journey-progress{position:absolute;bottom:0;left:0;right:0;display:flex;gap:8px;justify-content:center}
.journey-progress i{width:22px;height:3px;background:var(--line);border-radius:2px}
.journey-progress i.active{background:var(--accent)}

@media(min-width:1024px){.journey.motion-ready{display:grid;grid-template-columns:1fr 1fr;gap:100px}
.motion-ready .journey-stage{display:block;position:relative;height:min(620px,calc(100vh - 140px))}
.motion-ready .journey-scene{display:flex;min-height:85vh;padding:64px 0}
.motion-ready .scene-phone{display:none}
}

.legal-layout{display:grid;grid-template-columns:260px minmax(0,1fr);gap:80px;padding-top:72px;padding-bottom:100px;align-items:start}
.legal-toc{position:sticky;top:116px;max-height:calc(100vh - 140px);overflow:auto}
.legal-toc ol{list-style:none;padding-left:0;margin:0;color:var(--muted)}
.legal-toc li{padding:5px 0;font-size:12px}
.legal-toc a{color:var(--muted)}
.prose{max-width:760px;overflow-wrap:anywhere}
.prose h1{font-size:clamp(34px,4vw,52px);margin-bottom:28px}
.prose h2{font-size:26px;margin:44px 0 18px;scroll-margin-top:104px;letter-spacing:-.025em}
.prose p,.prose li{font-size:16px;color:var(--muted)}
.prose li{margin:8px 0}
.prose ul{padding-left:24px}
footer{border-top:1px solid var(--line);padding:54px 0 24px;color:var(--muted)}
.footer-top{display:flex;justify-content:space-between;gap:40px}
.footer-top p{font:italic 21px var(--serif);margin-top:14px}
.footer-top nav{display:flex;flex-wrap:wrap;gap:16px 28px;font-size:12px;align-content:flex-start}
.footer-top a{color:var(--text)}
.footer-bottom{display:flex;justify-content:space-between;gap:20px;font-size:10px;padding-top:48px}

@media(max-width:1100px){.wrap{padding-left:32px;padding-right:32px}
.hero-grid{gap:0}
.hero-copy h1{font-size:62px}
.floating-note{right:0}
.split{gap:40px}
.benefit-layout{gap:32px}
.nav .wrap{gap:22px}
.hero-actions{gap:12px}
.legal-layout{gap:40px}
}

@media(max-width:800px){.wrap{padding-left:24px;padding-right:24px}
.hero-grid{grid-template-columns:1fr}
.hero-copy{padding:30px 0 0}
.hero-copy h1{font-size:clamp(48px,9vw,72px)}
.hero-copy .lead{max-width:520px}
.hero-art{height:610px;max-width:520px;width:100%;margin:auto}
.hero-phone .phone{width:234px}
.hero-bottom{font-size:10px}
.split,.benefit-layout{grid-template-columns:1fr;gap:40px}
.section-heading{align-items:flex-start;flex-direction:column;gap:24px}
.steps-grid{grid-template-columns:1fr}
.step,.step+.step{padding:28px 0;border-left:0}
.step+.step{border-top:1px solid var(--line)}
.step-number{margin-bottom:18px}
.step-format{margin-top:20px}
section{padding:72px 0}
.listening-section{padding-bottom:12px}
.pricing-grid{grid-template-columns:1fr}
.journey-scene{grid-template-columns:1fr;padding:40px 0;gap:40px}
.legal-layout{grid-template-columns:1fr;gap:40px;padding-top:48px}
.legal-toc{position:static;max-height:none;border-bottom:1px solid var(--line);padding-bottom:28px}
.footer-top{flex-direction:column}
.footer-bottom{flex-direction:column;gap:8px}
.nav .wrap{height:70px}
.nav-download{display:none}
.nav ul{gap:20px}
.page-head{padding-top:64px}
.cta{padding:56px 20px}
}

@media(max-width:560px){.nav .wrap{justify-content:space-between}
.nav .brand{font-size:17px}
.menu-toggle{display:block;font-size:12px}
.nav ul{flex-wrap:wrap;gap:18px;font-size:12px;justify-content:center}
.menu-ready .nav ul{display:none;position:absolute;left:0;right:0;top:70px;background:var(--bg);padding:24px;border-bottom:1px solid var(--line);box-shadow:0 12px 18px #00000008}
.menu-ready .nav ul.open{display:flex}
.nav .wrap{flex-wrap:wrap;gap:10px}
body:not(.menu-ready) .nav .wrap{height:auto;min-height:70px;padding-top:12px;padding-bottom:12px}
body:not(.menu-ready) .nav ul{width:100%;margin:0}
body:not(.menu-ready) .menu-toggle{display:none}
.hero{padding-top:20px}
.hero .eyebrow{font-size:9px}
.hero-copy h1{font-size:52px}
.hero-actions{gap:16px}
.hero-art{height:560px}
.hero-phone .phone{width:215px}
.floating-note{bottom:110px;padding:12px;font-size:11px}
.hero-bottom{align-items:flex-start}
.hero-bottom>span{max-width:150px}
.hero-bottom a{white-space:nowrap}
.reader-demo{padding:24px}
.lyric p{font-size:24px}
.benefit-grid{grid-template-columns:1fr}
.benefit-grid .wide{grid-column:auto}
.card{padding:26px}
.pricing-grid .card{padding:28px}
.cta-row{flex-direction:column;align-items:center}
.page-head h1{font-size:43px}
.prose h1{font-size:36px}
}

@media(prefers-reduced-motion:reduce){*,*:before,*:after{scroll-behavior:auto!important;animation:none!important;transition:none!important}
.hero-phone{transform:none}
}

/* Pricing and support: dedicated illustrations, clear reading surfaces. */
.immersive-head{padding:36px 0;overflow:clip;text-align:left}
.page-hero-grid{display:grid;grid-template-columns:1.15fr 1fr;gap:24px;align-items:center;min-height:480px}
.page-hero-copy{min-width:0;padding:30px 0}
.immersive-head .lead{margin:24px 0;max-width:420px}
.immersive-head h1{font-size:clamp(42px,5vw,68px);line-height:1.17}
.page-art{position:relative;isolation:isolate;min-width:0;height:460px;color:var(--accent);background:radial-gradient(ellipse at center,var(--glow),transparent 68%)}
.page-art svg,.page-scene{position:absolute;inset:0;width:100%;height:100%;pointer-events:none}
.art-fallback{opacity:.65;transition:opacity .3s}
.page-art.scene-ready .art-fallback{opacity:0}
.art-symbol{filter:drop-shadow(0 8px 18px var(--glow))}
.page-art-caption{position:absolute;bottom:18px;left:0;right:0;text-align:center;font-size:11px;letter-spacing:.08em;color:var(--muted)}
.plans-section{padding-top:56px}
.billing-switch{border:0;padding:0;margin:0 auto 36px;text-align:center;min-width:0}
.billing-switch[hidden]{display:none}
.billing-switch legend{width:100%;font-size:12px;color:var(--muted);margin-bottom:12px}
.billing-options{display:inline-flex;gap:4px;padding:5px;border:1px solid var(--line);border-radius:999px;background:var(--card)}
.billing-options label{position:relative;cursor:pointer}
.billing-options input{position:absolute;opacity:0;width:1px;height:1px}
.billing-options span{display:block;border-radius:999px;padding:12px 24px;font-size:14px;color:var(--muted)}
.billing-options small{font-size:10px;margin-left:8px}
.billing-options input:checked+span{background:var(--accent);color:var(--on-accent)}
.billing-options input:focus-visible+span{outline:3px solid var(--accent);outline-offset:4px}
.pricing-grid .alternate-price{margin:0;font-size:15px}
.pricing-grid .annual-benefit{font-size:13px;margin:12px 0 0;color:var(--muted)}
.pro-plan[data-billing="yearly"] .annual-benefit,.pro-plan[data-billing="yearly"] .note{color:var(--accent);font-weight:600}
.billing-price{min-height:106px}
.support-section{padding-top:48px}
.topic-links{display:flex;flex-wrap:wrap;gap:10px;margin-bottom:48px;scroll-margin-top:110px}
.topic-links a{border:1px solid var(--line);border-radius:999px;background:var(--card);padding:12px 18px;font-size:13px;color:var(--text)}
.topic-links a:hover{border-color:var(--accent);color:var(--accent);text-decoration:none}
.faq-heading[id]{scroll-margin-top:110px}
.faq-answer{display:flow-root}
.contact-card{margin-top:48px;text-align:center;border-color:var(--accent);background:radial-gradient(ellipse at 50% 0,var(--glow),transparent 75%),var(--card);padding:40px}
@media(max-width:1023px){
 .page-hero-grid{grid-template-columns:1fr;gap:0;min-height:0;text-align:center}
 .page-hero-copy{padding:28px 0 0}.immersive-head .lead{margin:24px auto}
 .page-art{width:min(480px,100%);height:320px;margin:auto}.page-art-caption{bottom:4px}
 .page-scene{display:none}.immersive-head{padding:28px 0}
}
@media(max-width:560px){
 .immersive-head h1{font-size:42px}.page-art{height:280px}
 .billing-options span{padding:11px 16px}.billing-options small{margin-left:5px}
 .topic-links{gap:8px;margin-bottom:36px}.topic-links a{font-size:12px;padding:10px 13px}
 .plans-section,.support-section{padding-top:36px}.contact-card{padding:28px 20px}
 .contact-card .btn{font-size:12px;padding:16px 18px;max-width:100%}
}
@media(prefers-reduced-motion:reduce){.art-fallback{transition:none}}