:root{
  --ink:#334155;
  --muted:#64748b;
  --panel:rgba(255,255,255,.88);
  --border:rgba(148,163,184,.28);
  --shadow:0 18px 50px rgba(71,85,105,.08);
  --red:#dc6262;
  --blue:#3277c7;
  --yellow:#fef08a;
  --radius:28px;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  min-height:100vh;
  font-family:Inter,ui-rounded,"SF Pro Rounded","Segoe UI",system-ui,-apple-system,sans-serif;
  color:var(--ink);
  background:
    radial-gradient(circle at 5% 5%,rgba(253,230,138,.55),transparent 28rem),
    radial-gradient(circle at 95% 10%,rgba(191,219,254,.55),transparent 30rem),
    linear-gradient(180deg,#fff7ed 0%,#fef9c3 42%,#ecfeff 100%);
}
button,input{font:inherit}
button{cursor:pointer}
button:disabled{cursor:not-allowed;opacity:.5}
.hidden{display:none!important}
.app-shell{width:min(1180px,calc(100% - 28px));margin:0 auto;padding:28px 0 38px}
.panel{
  background:var(--panel);
  border:1px solid var(--border);
  box-shadow:var(--shadow);
  border-radius:var(--radius);
  backdrop-filter:blur(10px);
}
.hero{padding:30px;display:flex;align-items:center;justify-content:space-between;gap:24px}
.hero h1{font-size:clamp(36px,5vw,58px);line-height:1;margin:7px 0 12px;letter-spacing:-.04em}
.hero p{margin:0;color:var(--muted);font-size:18px;max-width:680px}
.eyebrow{text-transform:uppercase;letter-spacing:.12em;font-weight:800;font-size:12px;color:#7c3aed}
.hero-actions,.controls{display:flex;gap:10px;flex-wrap:wrap;align-items:center}
.btn,.icon-btn{
  border:1px solid rgba(148,163,184,.38);
  border-radius:18px;
  padding:12px 16px;
  background:#fff;
  color:var(--ink);
  font-weight:750;
  transition:.18s ease;
}
.btn:hover,.icon-btn:hover{transform:translateY(-1px);box-shadow:0 8px 22px rgba(71,85,105,.1)}
.btn-primary{background:#dbeafe;border-color:#bfdbfe;color:#1e4fa3}
.btn-accent{background:#fce7f3;border-color:#fbcfe8;color:#8a245d}
.btn-soft{background:#fffaf2}
.btn-ghost{background:#fff;color:#b91c1c;border-color:#fecaca}
.icon-btn{width:46px;height:46px;padding:0;display:grid;place-items:center}
.controls-panel{padding:22px;margin-top:18px}
.letter-tabs{display:flex;gap:8px;flex-wrap:wrap;margin-bottom:18px}
.letter-tab{
  min-width:50px;height:50px;border-radius:17px;border:2px solid transparent;font-size:19px;font-weight:850;
  transition:.18s ease;
}
.letter-tab.active{transform:translateY(-3px) scale(1.04);box-shadow:0 8px 20px rgba(71,85,105,.13)}
.controls{padding-top:18px;border-top:1px solid rgba(148,163,184,.18)}
.toggle-row,.range-row{
  display:flex;align-items:center;gap:10px;padding:10px 12px;background:rgba(255,255,255,.74);
  border-radius:16px;border:1px solid rgba(148,163,184,.22);
}
.range-row{min-width:270px;flex:1}
.range-row input{flex:1}
.main-grid{display:grid;grid-template-columns:.92fr 1.08fr;gap:18px;margin-top:18px}
.syllable-panel,.verses-panel,.skladushky-panel{padding:24px}
.section-head{display:flex;align-items:center;justify-content:space-between;gap:16px;margin-bottom:18px}
.section-head h2{margin:4px 0 0;font-size:30px;letter-spacing:-.025em}
.syllable-grid{display:grid;grid-template-columns:repeat(3,minmax(0,1fr));gap:14px}
.syllable-card{
  border:2px solid transparent;border-radius:25px;min-height:118px;padding:20px;display:flex;
  align-items:center;justify-content:center;font-weight:850;line-height:1;transition:.18s ease;position:relative;
}
.syllable-card:hover{transform:translateY(-2px);box-shadow:0 12px 30px rgba(71,85,105,.12)}
.syllable-card.playing{outline:5px solid rgba(124,58,237,.22);transform:scale(1.035)}
.syllable-card.recorded::after{
  content:"●";position:absolute;top:10px;right:13px;font-size:11px;color:#22c55e;
  filter:drop-shadow(0 1px 2px rgba(0,0,0,.1));
}
.verse-list{display:grid;gap:10px}
.verse-card{
  width:100%;text-align:left;border-radius:20px;padding:15px 17px;font-size:19px;line-height:1.65;
  border:2px solid transparent;color:#334155;white-space:pre-line;background:#fff;
}
.verse-card:hover{box-shadow:0 8px 18px rgba(71,85,105,.08)}
.target-consonant{color:var(--red);font-weight:900}
.target-vowel{background:var(--yellow);border-radius:6px;padding:0 2px;font-weight:800}
.skladushky-panel{margin-top:18px}
.method-grid{display:grid;grid-template-columns:.7fr 1.2fr .7fr;gap:18px;align-items:stretch}
.method-column{
  border-radius:22px;padding:16px;background:rgba(255,255,255,.6);display:grid;align-content:start;gap:9px;text-align:center;
}
.method-title{font-size:28px;font-weight:900;margin-bottom:4px}
.method-item{font-size:27px;font-weight:850}
.method-hero{
  min-height:260px;border-radius:26px;display:grid;place-items:center;font-size:92px;
  background:linear-gradient(145deg,#fff7ed,#fef3c7 52%,#fce7f3);
  border:1px dashed rgba(251,146,60,.3);
}
.cons{color:var(--red);font-weight:900}
.vow{color:var(--blue);font-weight:900}
.method-bottom{text-align:center;margin-top:18px;font-size:25px;line-height:1.7}
.method-bottom .method-item{display:inline-block;margin:0 7px}
.tips{display:grid;grid-template-columns:repeat(3,1fr);gap:14px;margin-top:18px}
.tip-card{
  background:rgba(255,255,255,.72);border:1px solid var(--border);border-radius:22px;padding:18px;color:#475569;line-height:1.5
}
.footer{display:flex;justify-content:space-between;gap:16px;margin-top:22px;color:#64748b;padding:0 4px;font-size:14px}
.footer a{color:#64748b;text-decoration:none}
.footer a:hover{text-decoration:underline}
.toast{
  position:fixed;left:50%;bottom:24px;transform:translateX(-50%);z-index:50;background:#0f172a;color:#fff;
  padding:12px 16px;border-radius:14px;box-shadow:0 14px 40px rgba(15,23,42,.24);opacity:0;pointer-events:none;transition:.2s
}
.toast.show{opacity:1}
@media(max-width:900px){
  .main-grid{grid-template-columns:1fr}
  .method-grid{grid-template-columns:1fr 1.1fr 1fr}
  .method-hero{min-height:220px}
}
@media(max-width:680px){
  .app-shell{width:min(100% - 18px,1180px);padding-top:10px}
  .hero{padding:22px;align-items:flex-start;flex-direction:column}
  .hero-actions{width:100%}
  .hero-actions .btn{flex:1}
  .controls-panel,.syllable-panel,.verses-panel,.skladushky-panel{padding:16px}
  .controls{align-items:stretch}
  .controls>*{width:100%}
  .range-row{min-width:0}
  .syllable-grid{grid-template-columns:repeat(2,minmax(0,1fr));gap:10px}
  .syllable-card{min-height:100px}
  .method-grid{grid-template-columns:1fr 1fr}
  .method-hero{grid-column:1/-1;grid-row:1;min-height:160px;font-size:70px}
  .tips{grid-template-columns:1fr}
  .footer{flex-direction:column}
}