/* ==========================================================================
   Talky AI Buds — Design System
   Classic editorial-journal meets AI-translation product
   ========================================================================== */

:root{
  /* --- Brand tokens (per brief) --- */
  --ink:            #0d0d0d;   /* near-black, headline/text */
  --navy:           #183f62;   /* deep brand navy */
  --navy-2:         #23557f;   /* lighter navy for gradients/hover */
  --yellow:         #f5b700;   /* CTA / button color */
  --yellow-dark:    #d99e00;
  --white:          #ffffff;   /* strip color */
  --paper:          #f6f4ee;   /* warm paper tint for alternating bands */
  --line:           #dfe3e8;   /* hairline borders */
  --navy-tint:      #eef3f7;   /* soft navy-tinted band */
  --ink-soft:       #4a5560;   /* secondary text */

  /* --- Type --- */
  --font-display: "Fraunces", Georgia, "Times New Roman", serif;
  --font-body:    "Public Sans", -apple-system, Segoe UI, Roboto, sans-serif;
  --font-mono:    "JetBrains Mono", "Courier New", monospace;

  --radius: 10px;
  --shadow-sm: 0 2px 10px rgba(13,13,13,0.06);
  --shadow-md: 0 10px 30px rgba(13,13,13,0.10);
  --shadow-lg: 0 20px 50px rgba(24,63,98,0.18);

  --maxw: 1180px;
}

*,*::before,*::after{ box-sizing:border-box; }
html{ scroll-behavior:smooth; scroll-padding-top:90px; }
body{
  margin:0;
  font-family:var(--font-body);
  color:var(--ink);
  background:var(--white);
  font-size:18px;
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
}
h1,h2,h3,h4{
  font-family:var(--font-display);
  color:var(--navy);
  line-height:1.15;
  margin:0 0 .5em;
}
h1{ font-size:clamp(2.4rem,5vw,3.6rem); font-weight:700; color:var(--ink); }
h2{ font-size:clamp(1.7rem,3.4vw,2.3rem); font-weight:600; }
h3{ font-size:1.35rem; font-weight:600; }
p{ margin:0 0 1.1em; font-size:1.05rem; }
a{ color:var(--navy); text-decoration-color:rgba(24,63,98,.35); text-underline-offset:3px; transition:color .2s ease, text-decoration-color .2s ease; }
a:hover{ color:var(--yellow-dark); text-decoration-color:var(--yellow-dark); }
img{ max-width:100%; display:block; }
.container{ max-width:var(--maxw); margin:0 auto; padding:0 24px; }
.eyebrow{
  font-family:var(--font-mono);
  text-transform:uppercase;
  letter-spacing:.14em;
  font-size:.78rem;
  color:var(--navy-2);
  display:inline-block;
  margin-bottom:.8em;
}
.section{ padding:88px 0; }
.section.band-paper{ background:var(--paper); }
.section.band-navy-tint{ background:var(--navy-tint); }
.section-head{ max-width:760px; margin:0 0 44px; }
.section-head.center{ margin:0 auto 44px; text-align:center; }

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;
  align-items:center;
  gap:10px;
  font-family:var(--font-body);
  font-weight:700;
  font-size:1rem;
  padding:16px 34px;
  border-radius:999px;
  border:none;
  cursor:pointer;
  text-decoration:none;
  position:relative;
  overflow:hidden;
  transition:transform .25s cubic-bezier(.2,.8,.2,1), box-shadow .25s ease, background .25s ease;
}
.btn-yellow{
  background:var(--yellow);
  color:var(--ink);
  box-shadow:0 6px 18px rgba(245,183,0,.35);
}
.btn-yellow:hover{
  background:var(--yellow-dark);
  color:var(--ink);
  transform:translateY(-3px);
  box-shadow:0 12px 26px rgba(245,183,0,.45);
}
.btn-yellow::after{
  content:"";
  position:absolute; top:0; left:-60%;
  width:40%; height:100%;
  background:linear-gradient(120deg, rgba(255,255,255,0) 0%, rgba(255,255,255,.55) 50%, rgba(255,255,255,0) 100%);
  transform:skewX(-20deg);
  transition:left .6s ease;
}
.btn-yellow:hover::after{ left:130%; }
.btn-outline{
  background:transparent;
  border:2px solid var(--navy);
  color:var(--navy);
}
.btn-outline:hover{ background:var(--navy); color:var(--white); transform:translateY(-3px); }

/* ---------- Header ---------- */
.site-header{
  position:sticky; top:0; z-index:1000;
  background:rgba(255,255,255,.92);
  backdrop-filter:blur(8px);
  border-bottom:1px solid var(--line);
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding:16px 24px;
  max-width:var(--maxw); margin:0 auto;
}
.brand{
  display:flex; align-items:center; gap:10px;
  font-family:var(--font-display); font-weight:700; font-size:1.35rem;
  color:var(--ink); text-decoration:none;
}
.brand .dot{ width:10px; height:10px; border-radius:50%; background:var(--yellow); box-shadow:0 0 0 4px var(--navy-tint); }
.brand:hover{ color:var(--navy); }
.nav-links{ display:flex; align-items:center; gap:32px; list-style:none; margin:0; padding:0; }
.nav-links a{
  color:var(--ink); font-weight:600; font-size:.98rem; text-decoration:none;
  position:relative; padding:6px 0;
}
.nav-links a::after{
  content:""; position:absolute; left:0; bottom:0; height:2px; width:0;
  background:var(--yellow); transition:width .25s ease;
}
.nav-links a:hover::after{ width:100%; }
.nav-links a:hover{ color:var(--navy); }
.header-actions{ display:flex; align-items:center; gap:18px; }
.hamburger{ display:none; background:none; border:none; cursor:pointer; padding:8px; }
.hamburger span{ display:block; width:26px; height:3px; background:var(--ink); margin:5px 0; border-radius:2px; transition:.3s; }

/* ---------- Language ticker (signature element) ---------- */
.ticker-wrap{
  background:var(--ink); color:var(--white);
  overflow:hidden; white-space:nowrap; padding:10px 0;
  border-bottom:1px solid rgba(255,255,255,.08);
}
.ticker-track{
  display:inline-flex; gap:48px;
  animation:ticker 26s linear infinite;
  font-family:var(--font-mono); font-size:.85rem; letter-spacing:.02em;
}
.ticker-track span{ color:var(--yellow); margin:0 8px; }
@keyframes ticker{ 0%{ transform:translateX(0);} 100%{ transform:translateX(-50%);} }

/* ---------- Hero / Intro ---------- */
.hero{
  padding:64px 0 90px;
  background:
    radial-gradient(1100px 480px at 85% -10%, rgba(24,63,98,.08), transparent 60%),
    var(--white);
}
.hero-grid{
  display:grid;
  grid-template-columns: 0.9fr 1.1fr;
  gap:56px;
  align-items:center;
}
.hero-media{ position:relative; }
.hero-media .frame{
  border-radius:18px;
  overflow:hidden;
  box-shadow:var(--shadow-lg);
  border:1px solid var(--line);
  transform:rotate(-1.2deg);
  transition:transform .5s cubic-bezier(.2,.8,.2,1);
}
.hero-media:hover .frame{ transform:rotate(0deg) scale(1.015); }
.hero-media .frame img{ width:100%; height:auto; }
.hero-media .badge{
  position:absolute; bottom:-18px; left:-18px;
  background:var(--white); border:1px solid var(--line);
  padding:12px 18px; border-radius:14px; box-shadow:var(--shadow-md);
  font-family:var(--font-mono); font-size:.82rem; color:var(--navy);
  animation:float 4.5s ease-in-out infinite;
}
@keyframes float{ 0%,100%{ transform:translateY(0);} 50%{ transform:translateY(-8px);} }
.hero-content h1{ margin-bottom:.15em; letter-spacing:-.01em; }
.hero-content h2{
  font-family:var(--font-body); font-weight:500; color:var(--ink-soft);
  font-size:1.35rem; margin-bottom:1em; max-width:560px;
}
.hero-content .lede{ font-size:1.12rem; color:var(--ink-soft); max-width:560px; }
.hero-cta-row{ display:flex; gap:18px; align-items:center; margin-top:28px; flex-wrap:wrap; }
.trust-row{ display:flex; gap:26px; margin-top:34px; flex-wrap:wrap; }
.trust-row .stat{ font-family:var(--font-mono); font-size:.82rem; color:var(--ink-soft); }
.trust-row .stat b{ display:block; font-family:var(--font-display); font-size:1.5rem; color:var(--navy); }

/* ---------- Generic two-col content ---------- */
.split{
  display:grid; grid-template-columns:1fr 1fr; gap:52px; align-items:center;
}
.split.reverse{ direction:rtl; }
.split.reverse > *{ direction:ltr; }
.media-card{
  border-radius:16px; overflow:hidden; box-shadow:var(--shadow-md);
  border:1px solid var(--line); transition:transform .4s ease, box-shadow .4s ease;
}
.media-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-lg); }
.media-card img{ transition:transform .6s ease; object-fit: cover; width: 100%;}
.media-card:hover img{ transform:scale(1.05); }

/* ---------- Cards / grids ---------- */
.grid-3{ display:grid; grid-template-columns:repeat(3,1fr); gap:26px; }
.grid-2{ display:grid; grid-template-columns:repeat(2,1fr); gap:26px; }
.card{
  background:var(--white); border:1px solid var(--line); border-radius:16px;
  padding:30px; transition:transform .3s ease, box-shadow .3s ease, border-color .3s ease;
}
.card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-md); border-color:var(--navy-2); }
.card .num{ font-family:var(--font-mono); color:var(--yellow-dark); font-weight:700; font-size:.85rem; }
.card h3{ margin-top:.4em; }

/* ---------- Mechanism component blocks ---------- */
.component{
  border:1px solid var(--line); border-radius:16px; padding:34px;
  background:var(--white); margin-bottom:26px;
  transition:box-shadow .3s ease, transform .3s ease;
}
.component:hover{ box-shadow:var(--shadow-md); transform:translateY(-3px); }
.component-head{ display:flex; align-items:baseline; gap:14px; flex-wrap:wrap; }
.component-tag{
  font-family:var(--font-mono); font-size:.72rem; letter-spacing:.08em; text-transform:uppercase;
  background:var(--navy-tint); color:var(--navy); padding:4px 10px; border-radius:999px;
}
.component dl{ display:grid; grid-template-columns:140px 1fr; gap:10px 18px; margin:18px 0 0; }
.component dt{ font-family:var(--font-mono); font-size:.8rem; color:var(--ink-soft); text-transform:uppercase; letter-spacing:.05em; }
.component dd{ margin:0; }
.verdict{
  margin-top:16px; padding:14px 18px; border-left:3px solid var(--yellow);
  background:var(--navy-tint); border-radius:0 10px 10px 0; font-size:.98rem;
}
.verdict b{ color:var(--navy); }

/* ---------- Pros & cons ---------- */
.pc-grid{ display:grid; grid-template-columns:1fr 1fr; gap:26px; }
.pc-card{ border-radius:16px; padding:30px; }
.pc-card.pros{ background:#f1f8f0; border:1px solid #d3ead0; }
.pc-card.cons{ background:#fdf3ef; border:1px solid #f2d9cd; }
.pc-card ul{ margin:0; padding-left:1.2em; }
.pc-card li{ margin-bottom:10px; }

/* ---------- FAQ ---------- */
.faq-item{
  border-bottom:1px solid var(--line); padding:22px 0;
}
.faq-q{
  display:flex; justify-content:space-between; align-items:center; cursor:pointer;
  font-family:var(--font-display); font-weight:600; font-size:1.1rem; color:var(--ink);
}
.faq-q .plus{ font-family:var(--font-mono); color:var(--yellow-dark); font-size:1.4rem; transition:transform .3s ease; }
.faq-item.open .plus{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .35s ease; }
.faq-item.open .faq-a{ max-height:400px; }
.faq-a p{ padding-top:14px; color:var(--ink-soft); }

/* ---------- Pricing ---------- */
.price-wrap{ text-align:center; }
.price-media{ position:relative; display:inline-block; max-width:520px; border-radius:18px; overflow:hidden; box-shadow:var(--shadow-md); margin:0 auto; }
.price-media img{ transition:transform .4s ease, filter .4s ease; }
.price-media:hover img{ transform:scale(1.04); filter:brightness(.95); }
.price-media .price-link-overlay{
  position:absolute; inset:0; display:flex; align-items:flex-end; justify-content:center;
  background:linear-gradient(0deg, rgba(13,13,13,.55), rgba(13,13,13,0) 45%);
  opacity:0; transition:opacity .3s ease;
}
.price-media:hover .price-link-overlay{ opacity:1; }
.price-link-overlay span{
  color:var(--white); font-weight:700; padding:14px 0 22px; font-family:var(--font-mono);
  letter-spacing:.04em; font-size:.95rem;
}
.bundle-note{ max-width:640px; margin:22px auto 0; color:var(--ink-soft); font-size:.98rem; }

/* ---------- Guarantee ---------- */
.guarantee-box{
  display:flex; gap:30px; align-items:center; border:1px solid var(--line);
  border-radius:18px; padding:38px; background:var(--navy-tint);
}
.guarantee-seal{
  flex:0 0 auto; width:110px; height:110px; border-radius:50%;
  background:var(--navy); color:var(--white); display:flex; align-items:center; justify-content:center;
  font-family:var(--font-display); font-weight:700; text-align:center; font-size:.95rem; line-height:1.2;
  box-shadow:var(--shadow-md); animation:pulse 3.5s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{ box-shadow:0 0 0 0 rgba(24,63,98,.25);} 50%{ box-shadow:0 0 0 14px rgba(24,63,98,0);} }

/* ---------- Reviewer strip ---------- */
.reviewer-grid{ display:grid; grid-template-columns:repeat(3,1fr); gap:24px; }
.reviewer-card{
  border:1px solid var(--line); border-radius:16px; overflow:hidden; background:var(--white);
  transition:transform .3s ease, box-shadow .3s ease;
}
.reviewer-card:hover{ transform:translateY(-6px); box-shadow:var(--shadow-md); }
.reviewer-card img{ width:100%; aspect-ratio:4/3; object-fit:cover; }
.reviewer-card .cap{ padding:16px 18px; font-size:.92rem; color:var(--ink-soft); }

/* ---------- Table ---------- */
table.compare{ width:100%; border-collapse:collapse; background:var(--white); border-radius:12px; overflow:hidden; box-shadow:var(--shadow-sm); }
table.compare th, table.compare td{ padding:14px 18px; text-align:left; border-bottom:1px solid var(--line); }
table.compare th{ background:var(--navy); color:var(--white); font-family:var(--font-mono); font-size:.82rem; text-transform:uppercase; letter-spacing:.05em; }
table.compare tr:hover td{ background:var(--navy-tint); }

/* ---------- Footer ---------- */
.site-footer{ background:var(--ink); color:#c9d2da; padding:56px 0 26px; }
.footer-grid{ display:grid; grid-template-columns:1.4fr 1fr 1fr; gap:40px; }
.site-footer h4{ color:var(--white); font-family:var(--font-body); font-size:.95rem; letter-spacing:.05em; text-transform:uppercase; }
.site-footer a{ color:#c9d2da; text-decoration:none; display:block; margin-bottom:10px; }
.site-footer a:hover{ color:var(--yellow); }
.footer-bottom{ border-top:1px solid rgba(255,255,255,.12); margin-top:40px; padding-top:22px; font-size:.85rem; color:#8b96a1; display:flex; justify-content:space-between; flex-wrap:wrap; gap:10px; }
.disclaimer-note{ font-size:.82rem; color:#8b96a1; max-width:900px; margin-top:18px; }

/* ---------- Back to top ---------- */
#backToTop{
  position:fixed; right:26px; bottom:26px; width:52px; height:52px; border-radius:50%;
  background:var(--navy); color:var(--white); border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:center; font-size:1.3rem;
  box-shadow:var(--shadow-md); opacity:0; visibility:hidden; transform:translateY(12px);
  transition:opacity .3s ease, transform .3s ease, background .3s ease; z-index:900;
}
#backToTop.show{ opacity:1; visibility:visible; transform:translateY(0); }
#backToTop:hover{ background:var(--yellow); color:var(--ink); }

/* ---------- Reveal on scroll ---------- */
.reveal{ opacity:0; transform:translateY(24px); transition:opacity .7s ease, transform .7s ease; }
.reveal.in{ opacity:1; transform:translateY(0); }

/* ---------- Article / journal pages ---------- */
.article-hero{ background:var(--navy); color:var(--white); padding:70px 0 60px; }
.article-hero .eyebrow{ color:var(--yellow); }
.article-hero h1{ color:var(--white); }
.article-hero p{ color:#dbe6ee; max-width:700px; font-size:1.1rem; }
.article-body{ max-width:780px; margin:0 auto; padding:64px 24px; }
.article-body h2{ margin-top:1.6em; }
.article-body h3{ color:var(--ink); margin-top:1.4em; }
.article-body p[data-snippet="true"]{
  background:var(--navy-tint); border-left:3px solid var(--navy); padding:16px 20px; border-radius:0 10px 10px 0;
}
.article-body figure{ margin:2em 0; }
.article-body figcaption{ font-size:.88rem; color:var(--ink-soft); margin-top:.6em; text-align:center; }
.article-body blockquote{
  border-left:3px solid var(--yellow); margin:1.6em 0; padding:.4em 1.4em; font-style:italic; color:var(--ink-soft);
}
.refs{ font-size:.92rem; color:var(--ink-soft); }
.refs li{ margin-bottom:10px; }
.back-link{ font-family:var(--font-mono); font-size:.9rem; }

/* ---------- Utility ---------- */
.center{ text-align:center; }
.mt-lg{ margin-top:48px; }
.small{ font-size:.88rem; color:var(--ink-soft); }

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *{ animation-duration:0.001ms !important; animation-iteration-count:1 !important; transition-duration:0.001ms !important; scroll-behavior:auto !important; }
}

/* ---------- Responsive ---------- */
@media (max-width:980px){
  .hero-grid, .split, .split.reverse{ grid-template-columns:1fr; direction:ltr; }
  .grid-3{ grid-template-columns:1fr 1fr; }
  .footer-grid{ grid-template-columns:1fr 1fr; }
  .reviewer-grid{ grid-template-columns:1fr 1fr; }
  .pc-grid{ grid-template-columns:1fr; }
}
@media (max-width:760px){
  body{ font-size:16.5px; }
  .nav-links{
    position:fixed; top:70px; right:0; left:0; background:var(--white);
    flex-direction:column; align-items:flex-start; padding:20px 24px; gap:16px;
    border-bottom:1px solid var(--line); box-shadow:var(--shadow-md);
    transform:translateY(-130%); transition:transform .3s ease; z-index:999;
  }
  .nav-links.open{ transform:translateY(0); }
  .hamburger{ display:block; }
  .header-actions .btn span.label-desktop{ display:none; }
  .grid-3{ grid-template-columns:1fr; }
  .footer-grid{ grid-template-columns:1fr; }
  .reviewer-grid{ grid-template-columns:1fr; }
  .guarantee-box{ flex-direction:column; text-align:center; }
  .component dl{ grid-template-columns:1fr; }
  .section{ padding:60px 0; }
}