/* ==========================================================================
   AudioSaude (Quietum Plus promo) — Apple-like / Awwwards vibe
   Invariants: center container, desktop left align, mobile center align,
   no overflow-x on 360px, WCAG AA focus, reduced motion.
   ========================================================================== */

:root{
  color-scheme: light dark;
  --gutter: 20px;
  --radius-xl: 22px;
  --radius-lg: 18px;
  --radius-md: 14px;

  --bg: #f7fbff;
  --bg2:#eef7ff;
  --surface: rgba(255,255,255,0.72);
  --surface2: rgba(255,255,255,0.85);
  --stroke: rgba(26,58,90,0.12);
  --text: #0f2238;
  --muted: rgba(15,34,56,0.72);
  --brand: #2aa7b8;
  --brand2:#1a3a5a;
  --shadow: 0 18px 48px rgba(15,34,56,0.10);
  --shadow2: 0 10px 28px rgba(15,34,56,0.12);
  --focus: 0 0 0 4px rgba(42,167,184,0.28);

  --hero-bg: url("/assets/img/ai/bg-hero-light.webp");
  --section-bg: url("/assets/img/ai/bg-section-light.webp");
  --pattern: url("/assets/img/ai/pattern-cards-light.webp");
}

@media (prefers-color-scheme: dark){
  :root{
    --bg:#0b0f19;
    --bg2:#0f172a;
    --surface: rgba(12,18,32,0.72);
    --surface2: rgba(12,18,32,0.84);
    --stroke: rgba(170,220,255,0.14);
    --text:#eef6ff;
    --muted: rgba(238,246,255,0.72);
    --shadow: 0 18px 48px rgba(0,0,0,0.42);
    --shadow2: 0 10px 28px rgba(0,0,0,0.46);
    --hero-bg: url("/assets/img/ai/bg-hero-dark.webp");
    --section-bg: url("/assets/img/ai/bg-section-dark.webp");
    --pattern: url("/assets/img/ai/pattern-cards-dark.webp");
  }
}

*{ box-sizing: border-box; }
html, body{ height: 100%; }
html{ overflow-x: clip; scroll-behavior: smooth; }
body{
  margin: 0;
  overflow-x: clip;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji","Segoe UI Emoji";
  color: var(--text);
  background: radial-gradient(1200px 900px at 10% -10%, var(--bg2), transparent 60%),
              radial-gradient(1100px 900px at 100% 10%, rgba(42,167,184,0.12), transparent 55%),
              var(--bg);
  line-height: 1.45;
}

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

a{ color: inherit; text-decoration: none; }
a:hover{ text-decoration: underline; }
a:focus-visible, button:focus-visible, select:focus-visible, summary:focus-visible{
  outline: none;
  box-shadow: var(--focus);
  border-radius: 10px;
}
.sr-only{
  position:absolute!important;
  width:1px; height:1px;
  padding:0; margin:-1px;
  overflow:hidden; clip:rect(0,0,0,0);
  white-space:nowrap; border:0;
}

.container{
  width: min(1120px, calc(100% - (var(--gutter) * 2)));
  margin-inline: auto;
}

@media (max-width: 900px){
  .container{ text-align: center; }
}

.skip-link{
  position:absolute;
  left: 12px; top: 12px;
  padding: 10px 12px;
  background: var(--surface2);
  border: 1px solid var(--stroke);
  border-radius: 12px;
  transform: translateY(-140%);
  z-index: 9999;
}
.skip-link:focus{ transform: translateY(0); }

header{
  position: relative;
  background-image: var(--hero-bg);
  background-size: cover;
  background-position: center;
}
#scrollProgress{
  position: fixed;
  top: 0; left: 0;
  height: 3px;
  width: 0%;
  background: linear-gradient(90deg, var(--brand), rgba(42,167,184,0.35));
  z-index: 1000;
}

.navbar{
  position: sticky;
  top: 0;
  z-index: 50;
  backdrop-filter: saturate(140%);
  background: rgba(255,255,255,0.55);
  border-bottom: 1px solid var(--stroke);
}
@media (prefers-color-scheme: dark){
  .navbar{ background: rgba(11,15,25,0.55); }
}

.nav-inner{
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 14px;
  padding: 12px 0;
}

.brand{
  display:flex;
  align-items:center;
  gap: 10px;
  font-weight: 800;
  letter-spacing: -0.02em;
}
.brand-mark{
  width: 34px; height: 34px;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--brand), var(--brand2));
  box-shadow: var(--shadow2);
  display:grid;
  place-items:center;
}
.brand-mark svg{ width: 22px; height:22px; }
.brand span{ font-size: 14px; opacity: .95; }
.brand small{ display:block; font-weight: 650; opacity: .7; letter-spacing: 0; }

.nav-links{
  display:flex;
  gap: 14px;
  align-items:center;
  font-size: 13px;
  color: var(--muted);
}
.nav-links a{
  padding: 10px 10px;
  border-radius: 12px;
}
.nav-links a:hover{
  background: rgba(42,167,184,0.10);
  text-decoration: none;
}

.nav-actions{ display:flex; gap: 10px; align-items:center; }

.lang{
  position:relative;
  display:flex;
  align-items:center;
}

.lang-btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  padding:10px 14px;
  border-radius:999px;
  border:1px solid var(--border);
  background:rgba(255,255,255,.06);
  color:var(--text);
  font-weight:700;
  cursor:pointer;
}

.lang-btn:hover{ background:rgba(255,255,255,.10); }

.lang-caret{
  opacity:.85;
  font-size:12px;
  transform:translateY(-1px);
}

.lang-menu{
  position:absolute;
  right:0;
  top:calc(100% + 10px);
  min-width:180px;
  padding:10px;
  border-radius:14px;
  border:1px solid rgba(255,255,255,.14);
  background:rgba(9,14,22,.98);
  box-shadow:0 24px 60px rgba(0,0,0,.35);
  display:none;
  z-index:50;
}

@media (prefers-color-scheme: light){
  .lang-menu{
  background:rgba(255,255,255,.98);
  border:1px solid rgba(15,34,56,.16);
  box-shadow:0 24px 60px rgba(15,34,56,.18);
  }
}

.lang[aria-expanded="true"] .lang-menu{ display:block; }

.lang-item{
  width:100%;
  text-align:left;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  padding:10px 12px;
  border-radius:10px;
  border:1px solid transparent;
  background:transparent;
  color:inherit;
  cursor:pointer;
  font-weight:700;
}

.lang-item:hover{
  background:rgba(255,255,255,.08);
  border-color:rgba(255,255,255,.10);
}

@media (prefers-color-scheme: light){
  .lang-item:hover{
  background:rgba(15,34,56,.06);
  border-color:rgba(15,34,56,.12);
  }
}

.lang-item[aria-current="true"]{
  background:rgba(29,195,185,.18);
  border-color:rgba(29,195,185,.34);
}

.lang-item small{
  opacity:.75;
  font-weight:600;
}

.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap: 10px;
  padding: 12px 16px;
  border-radius: 14px;
  border: 1px solid rgba(42,167,184,0.25);
  background: linear-gradient(135deg, var(--brand), rgba(42,167,184,0.55));
  color: #07202b;
  font-weight: 800;
  letter-spacing: -0.01em;
  box-shadow: var(--shadow2);
  text-decoration: none;
}
@media (prefers-color-scheme: dark){
  .btn{ color:#06141b; }
}
.btn:hover{ transform: translateY(-1px); text-decoration:none; }
.btn:active{ transform: translateY(0); }

.btn.secondary{
  background: transparent;
  color: var(--text);
  border: 1px solid var(--stroke);
  box-shadow: none;
}
.btn.secondary:hover{
  background: rgba(42,167,184,0.10);
}

.menu{
  display:none;
  border: 1px solid var(--stroke);
  background: var(--surface);
  padding: 10px 12px;
  border-radius: 14px;
  font-weight: 800;
}
.menu summary{
  list-style:none;
  cursor:pointer;
  display:flex;
  gap:10px;
  align-items:center;
}
.menu summary::-webkit-details-marker{ display:none; }
.menu-panel{
  display:grid;
  gap: 6px;
  padding-top: 10px;
}
.menu-panel a{ padding:10px 10px; border-radius: 12px; }
.menu-panel a:hover{ background: rgba(42,167,184,0.10); text-decoration:none; }

@media (max-width: 900px){
  .nav-links{ display:none; }
  .nav-actions > a.btn{ display:none !important; }
  .menu{ display:block; }
  .nav-inner{ padding: 10px 0; }
}

.hero{
  padding: 22px 0 12px;
}
.hero-grid{
  display:grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 42px;
  align-items: center;
  min-height: calc(100svh - 88px);
  padding: 18px 0 10px;
}
@media (max-width: 900px){
  .hero-grid{
    grid-template-columns: 1fr;
    gap: 20px;
    min-height: auto;
    padding: 20px 0 18px;
  }
}

.kicker{
  display:inline-flex;
  gap: 10px;
  align-items:center;
  padding: 8px 12px;
  border: 1px solid var(--stroke);
  background: var(--surface);
  border-radius: 999px;
  font-weight: 750;
  font-size: 12px;
  color: var(--muted);
  width: fit-content;
}
@media (max-width: 900px){
  .kicker{ margin-inline:auto; }
}

h1{
  font-size: clamp(34px, 4.2vw, 52px);
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin: 14px 0 10px;
}
.lead{
  font-size: 16px;
  color: var(--muted);
  margin: 0 0 18px;
  max-width: 56ch;
}
@media (max-width: 900px){
  .lead{ margin-inline:auto; }
}

.bullets{
  display:grid;
  gap: 10px;
  padding: 0;
  margin: 18px 0 22px;
  list-style: none;
}
.bullets li{
  display:flex;
  gap: 10px;
  align-items:flex-start;
  color: var(--muted);
  font-weight: 650;
}
.bullets svg{ flex:0 0 auto; margin-top:2px; }

.hero-actions{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
}
@media (max-width: 900px){
  .hero-actions{ justify-content:center; }
}

.media-card{
  background: linear-gradient(180deg, rgba(255,255,255,0.40), rgba(255,255,255,0.10));
  border: 1px solid var(--stroke);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow);
  position: relative;
  overflow: hidden;
}
@media (prefers-color-scheme: dark){
  .media-card{ background: linear-gradient(180deg, rgba(12,18,32,0.55), rgba(12,18,32,0.15)); }
}
.media-card:before{
  content:"";
  position:absolute;
  inset: -2px;
  background-image: var(--pattern);
  opacity: .34;
  pointer-events:none;
}
.media-card > *{ position: relative; z-index: 1; }
.media-card img{ display:block; margin-inline:auto; }

main{ display:block; }
section{
  padding: 28px 0;
}
section .section-head{
  display:flex;
  align-items:flex-end;
  justify-content: space-between;
  gap: 20px;
  margin-bottom: 16px;
}
section h2{
  margin: 0;
  font-size: 28px;
  letter-spacing: -0.03em;
}
section p.section-sub{
  margin: 8px 0 0;
  color: var(--muted);
  max-width: 74ch;
}
@media (max-width: 900px){
  section h2{ margin-inline:auto; }
  section .section-head{ flex-direction: column; align-items:center; }
  section p.section-sub{ margin-inline:auto; }
}

.surface{
  background-image: var(--section-bg);
  background-size: cover;
  background-position: center;
}

.vh{
  min-height: 100svh;
  display:flex;
}
.vh > .container{ margin-block: auto; }

.grid-2{
  display:grid;
  grid-template-columns: 0.95fr 1.05fr;
  gap: 22px;
  align-items: start;
}
@media (max-width: 900px){
  .grid-2{ grid-template-columns: 1fr; }
}

.cards{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}
@media (max-width: 900px){
  .cards{ grid-template-columns: 1fr; }
}

.card{
  border: 1px solid var(--stroke);
  background: var(--surface2);
  border-radius: var(--radius-lg);
  padding: 16px;
  box-shadow: var(--shadow2);
  position: relative;
  overflow: hidden;
  display:flex;
  flex-direction: column;
  min-height: 100%;
  align-items: stretch;
}
.card:before{
  content:"";
  position:absolute;
  inset:-2px;
  background-image: var(--pattern);
  opacity:.26;
  pointer-events:none;
}
.card > *{ position: relative; z-index: 1; }

.card h3{
  margin: 10px 0 6px;
  letter-spacing: -0.02em;
}
.card p{ margin: 0; color: var(--muted); }

.icon{
  width: 56px; height: 56px;
  display:block;
  margin-inline: 0;
}
@media (max-width: 900px){
  .icon{ margin-inline: auto; }
}

.reveal{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
  will-change: opacity, transform;
}
.reveal.is-visible{
  opacity: 1;
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .reveal{ opacity: 1; transform: none; transition:none; }
  .btn:hover, .btn:active{ transform:none; }
}

.steps{
  display:grid;
  gap: 12px;
}
.step{
  border: 1px solid var(--stroke);
  background: var(--surface);
  border-radius: var(--radius-lg);
  padding: 14px 14px;
  box-shadow: var(--shadow2);
}
.step h3{ margin: 0 0 6px; }
.step p{ margin:0; color: var(--muted); }
.step.is-active{
  outline: 2px solid rgba(42,167,184,0.35);
  background: rgba(42,167,184,0.10);
}
.experience-media{
  position: sticky;
  top: 92px;
}
@media (max-width: 900px){
  .experience-media{ position: static; }
}

.pillrow{
  display:flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-top: 16px;
}
@media (max-width: 900px){
  .pillrow{ justify-content:center; }
}
.pill{
  display:inline-flex;
  align-items:center;
  gap: 8px;
  padding: 10px 12px;
  border-radius: 999px;
  border: 1px solid var(--stroke);
  background: var(--surface);
  font-weight: 750;
  color: var(--muted);
}

.pricing{
  display:grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  align-items: stretch;
}
@media (max-width: 900px){
  .pricing{ grid-template-columns: 1fr; }
}

.price-card .badge{
  align-self: flex-start;
  padding: 8px 10px;
  border-radius: 999px;
  background: rgba(42,167,184,0.12);
  border: 1px solid rgba(42,167,184,0.22);
  font-weight: 900;
  font-size: 12px;
  letter-spacing: 0.02em;
  color: var(--muted);
  margin-bottom: 10px;
}
@media (max-width:900px){
  .price-card .badge{ margin-inline:auto; }
}

.price-row{
  margin-top: 10px;
  display:flex;
  align-items: baseline;
  gap: 10px;
  justify-content: space-between;
}
@media (max-width: 900px){
  .price-row{ justify-content:center; flex-wrap: wrap; }
}
.price{
  font-size: 34px;
  font-weight: 950;
  letter-spacing: -0.03em;
}
.strike{
  text-decoration: line-through;
  color: var(--muted);
  font-weight: 800;
}
.small{
  color: var(--muted);
  font-size: 13px;
}
.price-card .cta{
  margin-top: auto;
  padding-top: 14px;
}
.price-card img{ margin-top: 6px; }

.guarantee{
  display:grid;
  grid-template-columns: 0.45fr 1fr;
  gap: 16px;
  align-items:center;
}
@media (max-width:900px){
  .guarantee{ grid-template-columns:1fr; }
}
.badge-img{
  width: min(220px, 100%);
  margin-inline: 0;
}
@media (max-width:900px){
  .badge-img{ margin-inline:auto; }
}

.faq details{
  border: 1px solid var(--stroke);
  background: var(--surface2);
  border-radius: var(--radius-lg);
  padding: 12px 14px;
  box-shadow: var(--shadow2);
}
.faq details + details{ margin-top: 10px; }
.faq summary{
  cursor: pointer;
  font-weight: 900;
  letter-spacing: -0.01em;
}
.faq p{ color: var(--muted); margin: 10px 0 0; }

footer{
  padding: 22px 0 30px;
  border-top: 1px solid var(--stroke);
  background: linear-gradient(180deg, rgba(42,167,184,0.05), transparent 65%);
}
.footer-grid{
  display:grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 18px;
  align-items:start;
}
@media (max-width:900px){
  .footer-grid{ grid-template-columns: 1fr; }
}
.footer-links{
  display:flex;
  gap: 12px;
  flex-wrap: wrap;
  color: var(--muted);
  font-weight: 750;
  font-size: 13px;
}
.footer-note{
  color: var(--muted);
  font-size: 12px;
  margin-top: 10px;
}

.label-list{ columns:2; column-gap:26px; padding-left:18px; margin:10px 0 0; }
@media (max-width:900px){ .label-list{ columns:1; } }