/* ==========================================================================
   Pitch Detector — stylesheet
   Dark-first modern SaaS look with glassmorphism, light-mode support.
   ========================================================================== */

:root{
  --bg:#080b17;
  --bg-2:#0d1224;
  --card:rgba(255,255,255,.045);
  --card-solid:#111731;
  --stroke:rgba(255,255,255,.10);
  --stroke-2:rgba(255,255,255,.18);
  --text:#eaf0ff;
  --text-2:#a9b4d0;
  --text-3:#7e8aa8;
  --brand:#6ee7ff;
  --brand-2:#8b5cf6;
  --brand-3:#f472b6;
  --ok:#34d399;
  --warn:#fbbf24;
  --bad:#f87171;
  --radius:20px;
  --radius-sm:14px;
  --shadow:0 18px 50px -20px rgba(4,8,25,.85);
  --grad:linear-gradient(135deg,var(--brand) 0%,var(--brand-2) 55%,var(--brand-3) 100%);
  --font:"Inter",-apple-system,BlinkMacSystemFont,"Segoe UI",Roboto,"Helvetica Neue",Arial,sans-serif;
  --mono:ui-monospace,SFMono-Regular,"SF Mono",Menlo,Consolas,monospace;
  --maxw:1180px;
}

@media (prefers-color-scheme: light){
  :root{
    --bg:#f5f7ff;
    --bg-2:#eaefff;
    --card:rgba(255,255,255,.72);
    --card-solid:#ffffff;
    --stroke:rgba(20,30,70,.10);
    --stroke-2:rgba(20,30,70,.18);
    --text:#131a30;
    --text-2:#4b5674;
    --text-3:#6b7694;
    --brand:#0ea5b7;
    --brand-2:#6d3ff0;
    --brand-3:#db2777;
    --shadow:0 18px 44px -24px rgba(30,45,100,.35);
  }
}

*,*::before,*::after{box-sizing:border-box}
html{-webkit-text-size-adjust:100%;scroll-behavior:smooth;scroll-padding-top:90px}
@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
  *,*::before,*::after{animation-duration:.001ms !important;transition-duration:.001ms !important}
}
body{
  margin:0;
  font-family:var(--font);
  font-size:clamp(15.5px,.4vw + 15px,17px);
  line-height:1.7;
  color:var(--text);
  background:
    radial-gradient(900px 520px at 12% -8%,rgba(110,231,255,.16),transparent 60%),
    radial-gradient(900px 620px at 92% 4%,rgba(139,92,246,.18),transparent 62%),
    linear-gradient(180deg,var(--bg) 0%,var(--bg-2) 100%);
  background-attachment:fixed;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img,svg,canvas{max-width:100%;display:block}
h1,h2,h3,h4{line-height:1.2;letter-spacing:-.02em;margin:0 0 .5em}
h1{font-size:clamp(2.1rem,5vw,3.6rem);font-weight:800}
h2{font-size:clamp(1.6rem,3.2vw,2.35rem);font-weight:800}
h3{font-size:clamp(1.2rem,2vw,1.5rem);font-weight:700}
h4{font-size:1.05rem;font-weight:700}
p{margin:0 0 1em}
a{color:var(--brand);text-decoration:none}
a:hover{text-decoration:underline}
code{font-family:var(--mono);font-size:.9em;background:rgba(127,127,190,.16);padding:.15em .4em;border-radius:6px}
.wrap{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:clamp(16px,4vw,28px)}
.muted{color:var(--text-2)}
.small{font-size:.87rem}
.grad{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}

:where(a,button,summary,input,[tabindex]):focus-visible{
  outline:3px solid var(--brand);outline-offset:3px;border-radius:8px;
}

.skip-link{
  position:absolute;left:-9999px;top:0;z-index:100;
  background:var(--card-solid);color:var(--text);padding:12px 18px;border-radius:0 0 12px 0;font-weight:600;
}
.skip-link:focus{left:0}

/* decorative background orbs */
.bg-orbs{position:fixed;inset:0;pointer-events:none;z-index:-1;filter:blur(70px);opacity:.5}
.bg-orbs span{position:absolute;border-radius:50%;display:block}
.bg-orbs span:nth-child(1){width:38vw;height:38vw;left:-8vw;top:8vh;background:rgba(110,231,255,.22);animation:float 22s ease-in-out infinite}
.bg-orbs span:nth-child(2){width:34vw;height:34vw;right:-6vw;top:26vh;background:rgba(139,92,246,.24);animation:float 27s ease-in-out infinite reverse}
.bg-orbs span:nth-child(3){width:28vw;height:28vw;left:35vw;bottom:-8vh;background:rgba(244,114,182,.16);animation:float 32s ease-in-out infinite}
@keyframes float{50%{transform:translate3d(4vw,-4vh,0) scale(1.08)}}

/* ---------------- header ---------------- */
.site-header{
  position:sticky;top:0;z-index:50;
  backdrop-filter:blur(16px) saturate(160%);
  -webkit-backdrop-filter:blur(16px) saturate(160%);
  background:color-mix(in srgb,var(--bg) 72%,transparent);
  border-bottom:1px solid var(--stroke);
}
.header-inner{display:flex;align-items:center;gap:18px;min-height:68px;flex-wrap:wrap}
.brand{display:flex;align-items:center;gap:10px;color:var(--text);text-decoration:none;font-size:1.08rem}
.brand:hover{text-decoration:none}
.brand-mark{width:32px;height:32px;flex:0 0 auto}
.brand-text{font-weight:600;letter-spacing:-.03em}
.brand-text strong{font-weight:800;background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.site-nav{margin-inline-start:auto}
.site-nav ul{display:flex;gap:6px;list-style:none;margin:0;padding:0;flex-wrap:wrap}
.site-nav a{
  color:var(--text-2);font-size:.94rem;font-weight:500;padding:8px 12px;border-radius:10px;
  transition:background .2s,color .2s;
}
.site-nav a:hover{color:var(--text);background:var(--card);text-decoration:none}
.header-actions{display:flex;gap:8px}
.chip-btn{
  display:inline-flex;align-items:center;gap:7px;
  background:var(--card);border:1px solid var(--stroke);color:var(--text-2);
  font:inherit;font-size:.88rem;font-weight:600;padding:8px 13px;border-radius:999px;cursor:pointer;
  transition:transform .18s,border-color .2s,color .2s;
}
.chip-btn:hover{transform:translateY(-2px);color:var(--text);border-color:var(--stroke-2)}
.ico{width:17px;height:17px;fill:currentColor;flex:0 0 auto}

/* hamburger menu — checkbox-driven, no JS required to open/close */
.nav-toggle-input{display:none}
.nav-toggle-btn{
  display:none;align-items:center;justify-content:center;
  width:38px;height:38px;border-radius:10px;cursor:pointer;flex:0 0 auto;
  background:var(--card);border:1px solid var(--stroke);color:var(--text);
}
.nav-toggle-btn .ico{width:19px;height:19px;fill:none;stroke:currentColor}
.nav-toggle-btn .icon-close{display:none}
.nav-toggle-input:checked ~ .nav-toggle-btn .icon-burger{display:none}
.nav-toggle-input:checked ~ .nav-toggle-btn .icon-close{display:block}
@media (max-width:900px){
  .header-actions{order:1;margin-inline-start:auto}
  .nav-toggle-btn{display:inline-flex;order:2}
  .site-nav{
    order:5;width:100%;margin-inline-start:0;
    max-height:0;overflow:hidden;transition:max-height .28s ease;
  }
  .site-nav ul{flex-direction:column;gap:2px;padding-top:10px}
  .site-nav a{display:block;padding:11px 14px}
  .nav-toggle-input:checked ~ .site-nav{max-height:70vh;overflow-y:auto}
}

/* ---------------- buttons ---------------- */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:9px;
  font:inherit;font-weight:700;font-size:.97rem;line-height:1;
  padding:13px 22px;border-radius:14px;border:1px solid transparent;cursor:pointer;
  text-decoration:none;transition:transform .18s ease,box-shadow .25s ease,filter .2s,opacity .2s;
}
.btn:hover{text-decoration:none;transform:translateY(-2px)}
.btn:active{transform:translateY(0)}
.btn-lg{padding:16px 30px;font-size:1.03rem;border-radius:16px}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 12px 30px -12px rgba(139,92,246,.75)}
.btn-primary:hover{filter:brightness(1.08)}
.btn-ghost{background:var(--card);border-color:var(--stroke-2);color:var(--text)}
.btn-ghost:hover{border-color:var(--brand)}
.btn-danger{background:linear-gradient(135deg,#fb7185,#f43f5e);color:#fff}
.btn:disabled{opacity:.42;cursor:not-allowed;transform:none;box-shadow:none;filter:grayscale(.35)}

/* ---------------- cards ---------------- */
.card{
  background:var(--card);
  border:1px solid var(--stroke);
  border-radius:var(--radius);
  padding:clamp(20px,2.4vw,32px);
  box-shadow:var(--shadow);
}
.glass{
  backdrop-filter:blur(20px) saturate(150%);
  -webkit-backdrop-filter:blur(20px) saturate(150%);
}

/* ---------------- hero ---------------- */
.hero{padding-top:clamp(23px,3.5vw,43px);padding-bottom:clamp(14px,2vw,25px);text-align:center;max-width:940px}
.eyebrow{
  display:inline-flex;align-items:center;gap:9px;
  font-size:.85rem;font-weight:600;color:var(--text-2);
  background:var(--card);border:1px solid var(--stroke);border-radius:999px;padding:8px 16px;margin-bottom:22px;
}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--ok);box-shadow:0 0 0 0 rgba(52,211,153,.6);animation:pulse 2.4s infinite}
@keyframes pulse{70%{box-shadow:0 0 0 10px rgba(52,211,153,0)}100%{box-shadow:0 0 0 0 rgba(52,211,153,0)}}
.lede{font-size:clamp(1.02rem,1.2vw,1.16rem);color:var(--text-2);max-width:760px;margin-inline:auto}
.lede strong{color:var(--text)}
.hero-cta{display:flex;gap:14px;justify-content:center;flex-wrap:wrap;margin:15px 0 0}
.hero-stats{display:grid;grid-template-columns:repeat(auto-fit,minmax(140px,1fr));gap:14px;list-style:none;padding:0;margin:22px 0 0}
.hero-stats li{background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius-sm);padding:16px 12px}
.stat-num{display:block;font-weight:800;font-size:1.15rem;letter-spacing:-.02em}
.stat-lbl{display:block;font-size:.8rem;color:var(--text-3);margin-top:3px}

/* ---------------- sections ---------------- */
.section-title{text-align:center;margin-bottom:.35em}
.section-sub{text-align:center;color:var(--text-2);max-width:660px;margin:0 auto 19px}
.steps-section,.tuner-section,.prose-section,.cta-band{padding-block:clamp(20px,3vw,36px)}

/* steps */
.steps{list-style:none;padding:0;margin:0;display:grid;gap:14px;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));counter-reset:s}
.step{position:relative;overflow:hidden}
.step.card{padding:clamp(16px,2vw,22px)}
.step::after{content:"";position:absolute;inset:0 0 auto;height:3px;background:var(--grad)}
.step-num{
  display:inline-block;font-size:.72rem;font-weight:800;letter-spacing:.14em;text-transform:uppercase;
  color:var(--brand);margin-bottom:8px;
}
.step-art{width:38px;height:38px;color:var(--brand-2);margin-bottom:8px}
.step p{color:var(--text-2);margin-bottom:0;font-size:.92rem}
.step strong,.step em{color:var(--text)}

/* ---------------- tuner ---------------- */
.tuner-shell{padding:clamp(16px,2.1vw,26px)}
.tuner-top{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap;margin-bottom:14px}
.mic-status{display:inline-flex;align-items:center;gap:10px;margin:0;font-size:.93rem;font-weight:600;color:var(--text-2)}
.mic-led{width:11px;height:11px;border-radius:50%;background:var(--text-3);flex:0 0 auto;transition:background .3s,box-shadow .3s}
.mic-status[data-state="live"] .mic-led{background:var(--ok);box-shadow:0 0 0 4px rgba(52,211,153,.2);animation:pulse 2s infinite}
.mic-status[data-state="live"]{color:var(--ok)}
.mic-status[data-state="denied"] .mic-led,.mic-status[data-state="error"] .mic-led{background:var(--bad);box-shadow:0 0 0 4px rgba(248,113,113,.18)}
.mic-status[data-state="denied"],.mic-status[data-state="error"]{color:var(--bad)}
.mic-status[data-state="pending"] .mic-led{background:var(--warn);animation:pulse 1.2s infinite}
.controls{display:flex;gap:10px;flex-wrap:wrap}

.kbd-hint{font-size:.85rem;color:var(--text-3);margin:0 0 10px}
kbd{
  font-family:var(--mono);font-size:.82em;padding:2px 7px;border-radius:6px;
  background:var(--card);border:1px solid var(--stroke-2);box-shadow:0 1px 0 var(--stroke-2);color:var(--text);
}

/* alerts */
.alert-area{display:grid;gap:8px;margin-bottom:12px}
.alert-area:empty{margin-bottom:0}
.alert{
  display:flex;gap:12px;align-items:flex-start;
  border-radius:var(--radius-sm);padding:13px 16px;font-size:.93rem;
  border:1px solid;animation:slideIn .3s ease both;
}
@keyframes slideIn{from{opacity:0;transform:translateY(-6px)}}
.alert strong{display:block;margin-bottom:2px}
.alert p{margin:0;color:inherit;opacity:.9}
.alert-warn{background:rgba(251,191,36,.12);border-color:rgba(251,191,36,.4);color:var(--warn)}
.alert-error{background:rgba(248,113,113,.12);border-color:rgba(248,113,113,.4);color:var(--bad)}
.alert-info{background:rgba(110,231,255,.1);border-color:rgba(110,231,255,.35);color:var(--brand)}
.alert-icon{font-size:1.05rem;line-height:1.5}

/* meter grid */
.meter-grid{display:grid;grid-template-columns:minmax(0,1.15fr) minmax(0,1fr);gap:clamp(14px,2vw,22px);align-items:start}
@media (max-width:900px){.meter-grid{grid-template-columns:1fr}}

.tuner-dial{position:relative;color:var(--text-3)}
.dial-svg{width:100%;height:auto;overflow:visible}
.dial-ticks line{stroke-width:2;opacity:.35}
/* The needle keeps the high-contrast text colour so it stays legible over every
   part of the coloured arc; state is carried by the tip dot and the glow. */
.needle{stroke:var(--text);stroke-width:6}
.needle-tip{fill:var(--text);transition:fill .3s}
.dial-hub{fill:var(--text-3);opacity:.45}
.needle-group{
  transform-origin:200px 200px;
  transition:transform .13s cubic-bezier(.22,1,.36,1);
  will-change:transform;
}
.tuner-dial[data-accuracy="perfect"] .needle{filter:drop-shadow(0 0 8px rgba(52,211,153,.95))}
.tuner-dial[data-accuracy="perfect"] .needle-tip{fill:var(--ok)}
.tuner-dial[data-accuracy="close"] .needle{filter:drop-shadow(0 0 7px rgba(251,191,36,.9))}
.tuner-dial[data-accuracy="close"] .needle-tip{fill:var(--warn)}
.tuner-dial[data-accuracy="off"] .needle{filter:drop-shadow(0 0 7px rgba(248,113,113,.9))}
.tuner-dial[data-accuracy="off"] .needle-tip{fill:var(--bad)}

.note-readout{position:absolute;left:50%;top:50%;transform:translate(-50%,0);text-align:center;width:100%;pointer-events:none}
.note-name{
  font-size:clamp(2.3rem,6.5vw,3.4rem);font-weight:800;line-height:1;margin:0;letter-spacing:-.04em;
  font-variant-numeric:tabular-nums;transition:color .25s;
}
.tuner-dial[data-accuracy="perfect"] .note-name{color:var(--ok)}
.note-acc{font-size:.5em;vertical-align:super;margin-left:.02em}
.note-oct{font-size:.42em;color:var(--text-2);margin-left:.06em;font-weight:700}
.note-freq{font-family:var(--mono);font-size:1.05rem;margin:4px 0 2px;color:var(--text)}
.note-freq .unit{color:var(--text-3);font-size:.85em}
.note-cents{font-size:.88rem;color:var(--text-2);margin:0;min-height:1.3em;font-weight:600}

.sharp-flat{display:flex;justify-content:center;gap:8px;flex-wrap:wrap;margin:10px 0 0;font-size:.85rem;font-weight:700}
.sf{padding:7px 14px;border-radius:999px;border:1px solid var(--stroke);color:var(--text-3);background:var(--card);opacity:.45;transition:.25s}
[data-sf="flat"] .sf-flat{opacity:1;color:var(--warn);border-color:var(--warn);background:rgba(251,191,36,.12)}
[data-sf="sharp"] .sf-sharp{opacity:1;color:var(--warn);border-color:var(--warn);background:rgba(251,191,36,.12)}
[data-sf="ok"] .sf-ok{opacity:1;color:var(--ok);border-color:var(--ok);background:rgba(52,211,153,.14)}

/* readouts */
.readouts{display:grid;grid-template-columns:repeat(2,minmax(0,1fr));gap:8px}
.ro{
  background:var(--card);border:1px solid var(--stroke);border-radius:var(--radius-sm);
  padding:9px 12px;display:flex;flex-direction:column;gap:2px;min-width:0;
}
.ro-wide{grid-column:1/-1}
.ro-lbl{font-size:.72rem;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3)}
.ro-val{font-family:var(--mono);font-size:1.1rem;font-weight:700;letter-spacing:-.02em;overflow-wrap:anywhere}
.ro-val small{font-size:.62em;color:var(--text-3);font-family:var(--font)}
.hint{
  display:inline-grid;place-items:center;width:15px;height:15px;border-radius:50%;
  background:var(--stroke-2);color:var(--text);font-size:.62rem;cursor:help;text-transform:none;letter-spacing:0;
}
.bar{position:relative;height:9px;border-radius:999px;background:rgba(127,127,190,.2);overflow:hidden;margin-top:3px}
.bar-fill{position:absolute;inset:0 auto 0 0;width:0;border-radius:999px;background:linear-gradient(90deg,var(--brand),var(--brand-2));transition:width .12s linear,background .3s}
.bar-accuracy .bar-fill{background:linear-gradient(90deg,var(--bad),var(--warn) 55%,var(--ok))}
.bar-note{font-size:.78rem;color:var(--text-2);font-weight:600}

.settings-row{gap:8px}
.ref-input{display:flex;align-items:center;gap:12px}
.ref-input input[type=range]{flex:1;accent-color:var(--brand-2);min-width:0}
.ref-input output{font-family:var(--mono);font-weight:700;font-size:.95rem;min-width:74px;text-align:right}
.switch{display:flex;align-items:center;gap:9px;font-size:.87rem;color:var(--text-2);cursor:pointer}
.switch input{width:18px;height:18px;accent-color:var(--brand-2);flex:0 0 auto}

/* visualisers */
.viz-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(300px,1fr));gap:10px;margin-top:14px}
.viz{margin:0;background:rgba(6,10,26,.35);border:1px solid var(--stroke);border-radius:var(--radius-sm);padding:10px;min-width:0}
@media (prefers-color-scheme: light){.viz{background:rgba(255,255,255,.55)}}
.viz figcaption{font-size:.8rem;font-weight:700;color:var(--text-2);margin-bottom:6px;display:flex;flex-wrap:wrap;gap:6px;align-items:baseline}
.viz figcaption span{font-weight:500;color:var(--text-3);font-size:.94em}
.viz canvas{width:100%;height:110px;border-radius:10px}

.privacy-note{display:flex;gap:9px;align-items:center;justify-content:center;font-size:.85rem;color:var(--text-3);margin:12px 0 0;text-align:center}
.privacy-note .ico{fill:var(--ok)}

/* tips */
.tips{margin-top:22px}
.tips h3{margin-bottom:.7em}
.tip-list{list-style:none;padding:0;margin:0;display:grid;gap:12px;grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.tip-list li{position:relative;padding-left:26px;color:var(--text-2);font-size:.94rem}
.tip-list li::before{content:"";position:absolute;left:0;top:.55em;width:11px;height:11px;border-radius:3px;background:var(--grad)}
.tip-list strong{color:var(--text)}

/* ---------------- prose ---------------- */
.two-col{display:grid;grid-template-columns:repeat(auto-fit,minmax(320px,1fr));gap:20px;margin-bottom:20px}
.prose{color:var(--text-2)}
.prose h3{color:var(--text)}
.prose h4{color:var(--text);margin-top:1.4em}
.prose strong,.prose em{color:var(--text)}
.prose ul,.prose ol{padding-left:1.25em;margin:0 0 1em}
.prose li{margin-bottom:.55em}
.prose-section .card + .card{margin-top:20px}
.numbered{counter-reset:n;list-style:none;padding:0}
.numbered li{position:relative;padding-left:44px;margin-bottom:1em}
.numbered li::before{
  counter-increment:n;content:counter(n);
  position:absolute;left:0;top:-1px;width:30px;height:30px;border-radius:10px;
  display:grid;place-items:center;font-weight:800;font-size:.9rem;
  background:var(--grad);color:#fff;
}
.formula{
  font-family:var(--mono);font-size:1.02rem;color:var(--text);
  background:rgba(127,127,190,.13);border-left:3px solid var(--brand);
  padding:12px 16px;border-radius:0 12px 12px 0;overflow-x:auto;
}
.callout{background:rgba(110,231,255,.09);border:1px solid rgba(110,231,255,.28);border-radius:var(--radius-sm);padding:14px 16px;color:var(--text-2)}
.check-list{list-style:none;padding:0;display:grid;gap:10px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.check-list li{position:relative;padding-left:28px}
.check-list li::before{content:"✓";position:absolute;left:0;color:var(--ok);font-weight:800}
.grid-3{display:grid;gap:16px;grid-template-columns:repeat(auto-fit,minmax(250px,1fr))}
.mini{background:rgba(127,127,190,.08);border:1px solid var(--stroke);border-radius:var(--radius-sm);padding:16px}
.mini h4{margin-top:0;margin-bottom:.4em}
.mini p{margin:0;font-size:.92rem}

/* tables */
.table-scroll{overflow-x:auto;margin:0 0 1.2em;border:1px solid var(--stroke);border-radius:var(--radius-sm)}
table{width:100%;border-collapse:collapse;font-size:.93rem;min-width:460px}
caption{caption-side:bottom;padding:10px 14px;font-size:.82rem;color:var(--text-3);text-align:left}
th,td{padding:11px 14px;text-align:left;border-bottom:1px solid var(--stroke)}
thead th{font-size:.78rem;letter-spacing:.06em;text-transform:uppercase;color:var(--text-3);background:rgba(127,127,190,.1)}
tbody th{color:var(--text);font-weight:700}
tbody tr:last-child td,tbody tr:last-child th{border-bottom:0}
tbody tr:hover{background:rgba(127,127,190,.07)}

/* accordion */
.accordion{display:grid;gap:12px}
.accordion .card{padding:0;overflow:hidden}
.accordion summary{
  cursor:pointer;list-style:none;padding:17px 22px;font-weight:700;color:var(--text);
  display:flex;justify-content:space-between;align-items:center;gap:14px;transition:color .2s;
}
.accordion summary::-webkit-details-marker{display:none}
.accordion summary::after{
  content:"";width:10px;height:10px;flex:0 0 auto;
  border-right:2.5px solid var(--brand);border-bottom:2.5px solid var(--brand);
  transform:rotate(45deg);transition:transform .25s;margin-bottom:4px;
}
.accordion details[open] summary::after{transform:rotate(225deg);margin-bottom:0;margin-top:4px}
.accordion summary:hover{color:var(--brand)}
.det-body{padding:0 22px 18px;color:var(--text-2);animation:fade .25s ease both}
.det-body p:last-child{margin-bottom:0}
@keyframes fade{from{opacity:0;transform:translateY(-4px)}}

/* CTA + footer */
.cta-inner{text-align:center;padding:clamp(28px,4vw,48px)}
.cta-inner h2{margin-bottom:.3em}
.cta-inner p{color:var(--text-2);margin-bottom:0}
.site-footer{border-top:1px solid var(--stroke);margin-top:30px;padding-block:34px;background:rgba(8,11,23,.4)}
@media (prefers-color-scheme: light){.site-footer{background:rgba(255,255,255,.5)}}
.footer-inner{
  display:grid;gap:28px;
  grid-template-columns:minmax(200px,1.4fr) repeat(2,minmax(140px,1fr));
  align-items:start;
}
.footer-brand{font-size:1.15rem;margin:0 0 6px}
.footer-heading{
  font-size:.76rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;
  color:var(--text-3);margin:0 0 12px;
}
.footer-links{display:flex;flex-direction:column;gap:10px;list-style:none;padding:0;margin:0}
.footer-links a{color:var(--text-2);font-size:.92rem}
.footer-links a:hover{color:var(--brand)}
.footer-copy{grid-column:1/-1;border-top:1px solid var(--stroke);padding-top:20px;margin:6px 0 0}
@media (max-width:720px){
  .footer-inner{grid-template-columns:1fr 1fr}
  .footer-inner>div:first-child{grid-column:1/-1}
}
@media (max-width:460px){
  .footer-inner{grid-template-columns:1fr}
}

/* toast */
.toast{
  position:fixed;left:50%;bottom:26px;transform:translate(-50%,140%);
  background:var(--card-solid);border:1px solid var(--stroke-2);color:var(--text);
  padding:13px 22px;border-radius:14px;font-weight:600;font-size:.92rem;z-index:80;
  box-shadow:var(--shadow);transition:transform .35s cubic-bezier(.22,1,.36,1);max-width:90vw;text-align:center;
}
.toast.show{transform:translate(-50%,0)}

@media (max-width:620px){
  /* icon-only share/bookmark so the brand and actions stay on one row */
  .chip-btn span{position:absolute;width:1px;height:1px;overflow:hidden;clip-path:inset(50%);white-space:nowrap}
  .chip-btn{padding:10px}
  .ico{width:19px;height:19px}
}
@media (max-width:520px){
  .controls{width:100%}
  .controls .btn{flex:1 1 auto;padding:13px 14px}
  .readouts{grid-template-columns:1fr}
  .note-readout{top:52%}
  .sharp-flat{font-size:.8rem}
}
@media print{
  .site-header,.bg-orbs,.controls,.viz-grid,.toast,.cta-band{display:none}
  body{background:#fff;color:#000}
}

/* ==========================================================================
   Secondary pages — About, Contact, Privacy Policy, Sitemap
   ========================================================================== */

.legal-hero{padding-top:clamp(40px,6vw,72px);padding-bottom:clamp(20px,3vw,32px);text-align:center;max-width:820px}
.legal-hero .lede{max-width:680px;margin-inline:auto}
.legal-body{padding-top:0}

/* table of contents (privacy policy) */
.toc{margin-bottom:20px}
.toc-title{font-size:.78rem;font-weight:800;letter-spacing:.08em;text-transform:uppercase;color:var(--text-3);margin:0 0 12px}
.toc ol{list-style:none;counter-reset:toc;padding:0;margin:0;columns:2;column-gap:24px}
@media (max-width:640px){.toc ol{columns:1}}
.toc li{counter-increment:toc;break-inside:avoid;margin-bottom:9px}
.toc a{color:var(--text-2);font-size:.93rem;font-weight:600}
.toc a::before{content:counter(toc)". ";color:var(--brand);font-weight:800}
.toc a:hover{color:var(--brand)}

/* contact page */
.contact-section{padding-block:clamp(10px,2vw,26px) clamp(40px,6vw,70px)}
.contact-grid{display:grid;grid-template-columns:minmax(0,1.5fr) minmax(0,1fr);gap:22px;align-items:start}
@media (max-width:860px){.contact-grid{grid-template-columns:1fr}}
.contact-form h2{margin-bottom:.9em}
.field{margin-bottom:18px}
.field label{display:block;font-size:.85rem;font-weight:700;color:var(--text-2);margin-bottom:7px}
.field input,.field select,.field textarea{
  width:100%;font:inherit;font-size:.96rem;color:var(--text);
  background:rgba(127,127,190,.08);border:1px solid var(--stroke-2);border-radius:12px;
  padding:12px 14px;transition:border-color .2s,background .2s;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:none;border-color:var(--brand);background:rgba(127,127,190,.13);
}
.field textarea{resize:vertical;min-height:120px;font-family:inherit}
.field-hint{font-size:.82rem;color:var(--text-3);margin:6px 0 0}
#formStatus{margin-top:16px;padding:12px 14px;border-radius:12px;background:rgba(52,211,153,.12);border:1px solid rgba(52,211,153,.35);color:var(--ok)}
.contact-side{display:grid;gap:18px}
.contact-side h2{font-size:1.1rem;margin-bottom:.5em}
.email-btn{width:100%;justify-content:flex-start;gap:10px;font-family:var(--mono);font-size:.92rem;word-break:break-all;white-space:normal;text-align:left}
.contact-links li{margin-bottom:10px}
.contact-links a{font-weight:700}
.contact-links li::before{top:.35em}

/* sitemap page */
.sitemap-grid{display:grid;gap:18px;grid-template-columns:repeat(auto-fit,minmax(280px,1fr))}
.sm-group h2{font-size:1.1rem;margin-bottom:1em;padding-bottom:.6em;border-bottom:1px solid var(--stroke)}
.sm-list{list-style:none;padding:0;margin:0;display:grid;gap:14px}
.sm-list a{font-weight:700;font-size:.98rem}
.sm-list span{display:block;color:var(--text-3);font-size:.85rem;margin-top:2px}

/* ==========================================================================
   Vocal Range Test — page-specific additions (reuses tokens/components above)
   ========================================================================== */

.rt-progress{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:0 0 22px;list-style:none;padding:0}
.rt-progress li{
  display:flex;align-items:center;gap:8px;font-size:.85rem;font-weight:700;color:var(--text-3);
  background:var(--card);border:1px solid var(--stroke);border-radius:999px;padding:7px 16px 7px 8px;
  transition:color .25s,border-color .25s;
}
.rt-dot{
  width:22px;height:22px;border-radius:50%;display:grid;place-items:center;font-size:.72rem;font-weight:800;
  background:rgba(127,127,190,.18);color:var(--text-3);flex:0 0 auto;transition:background .25s,color .25s;
}
.rt-progress li[data-state="active"]{color:var(--text);border-color:var(--stroke-2)}
.rt-progress li[data-state="active"] .rt-dot{background:var(--grad);color:#fff}
.rt-progress li[data-state="done"]{color:var(--ok)}
.rt-progress li[data-state="done"] .rt-dot{background:rgba(52,211,153,.18);color:var(--ok)}

.rt-phase[hidden]{display:none}
.rt-instruction{text-align:center;max-width:540px;margin:0 auto 18px}
.rt-instruction p{color:var(--text-2);margin-bottom:0}
.rt-confirm{text-align:center;max-width:460px;margin:18px auto 0}
.rt-confirm[hidden]{display:none}
.rt-confirm p{color:var(--text-2)}

.flash-ok{animation:flashOk .7s ease}
@keyframes flashOk{
  0%{box-shadow:0 0 0 0 rgba(52,211,153,.55)}
  100%{box-shadow:0 0 0 26px rgba(52,211,153,0)}
}

.voice-badge{
  display:inline-flex;align-items:center;gap:10px;
  background:var(--grad);color:#fff;font-weight:800;font-size:1.1rem;
  padding:12px 24px;border-radius:999px;box-shadow:0 12px 30px -14px rgba(139,92,246,.7);
}
.voice-badge .vb-sub{font-weight:600;font-size:.78em;opacity:.75}
.result-hero{display:flex;flex-direction:column;align-items:center;gap:12px;text-align:center;margin-bottom:6px}

.range-track{position:relative;height:14px;border-radius:999px;background:rgba(127,127,190,.18);margin:16px 0 8px;overflow:hidden}
.range-fill{position:absolute;top:0;bottom:0;border-radius:999px;background:var(--grad)}
.range-labels{display:flex;justify-content:space-between;font-size:.78rem;color:var(--text-3);font-weight:700}

.piano-wrap{overflow-x:auto;padding:8px 2px 2px}
.piano-svg{display:block;margin:0 auto}
.piano-key-white{fill:var(--card-solid);stroke:var(--stroke-2);stroke-width:1}
.piano-key-black{fill:var(--text);opacity:.85}
.piano-key-white.in-range{fill:rgba(110,231,255,.3)}
.piano-key-black.in-range{fill:var(--brand-2)}
.piano-key-white.is-edge{fill:var(--brand)}
.piano-key-black.is-edge{fill:var(--brand-3)}
.piano-label{font-size:11px;font-weight:700;fill:var(--text-2);text-anchor:middle}

.rt-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap;margin-top:24px}

.tip-list.warn li::before{background:linear-gradient(135deg,var(--warn),var(--bad))}

/* ============ Reference piano (playable) ============ */
.ref-piano-svg .piano-key-white,.ref-piano-svg .piano-key-black{cursor:pointer;transition:fill .08s}
.ref-piano-svg .piano-key-white:hover{fill:rgba(110,231,255,.16)}
.ref-piano-svg .piano-key-black:hover{fill:var(--brand-2)}
.ref-piano-svg .piano-key-white.active{fill:var(--brand)}
.ref-piano-svg .piano-key-black.active{fill:var(--brand-3);opacity:1}

/* ============ Violin tuner — string selector ============ */
.mode-select{display:flex;gap:8px;justify-content:center;flex-wrap:wrap;margin:0 0 20px}
.mode-btn{
  display:flex;flex-direction:column;align-items:center;gap:2px;
  min-width:74px;padding:10px 16px;border-radius:var(--radius-sm);
  border:1px solid var(--stroke-2);background:var(--card);color:var(--text-2);
  font-weight:700;cursor:pointer;transition:.2s;font-family:inherit;font-size:.92rem;
}
.mode-btn:hover{color:var(--text)}
.mode-btn[aria-pressed="true"]{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 10px 26px -14px rgba(139,92,246,.7)}
.mode-btn .mb-sub{font-size:.7rem;font-weight:600;opacity:.8;font-family:var(--mono)}
.in-tune-flag{display:flex;margin:14px auto 0}
.in-tune-flag[hidden]{display:none}
.target-row{display:flex;align-items:center;justify-content:center;gap:8px;margin:0 0 18px;flex-wrap:wrap;text-align:center;color:var(--text-2);font-size:.92rem}
.target-row strong{color:var(--text);font-family:var(--mono)}

/* ============ Guitar tuner — tuning presets & reference tones ============ */
.preset-row{display:flex;align-items:center;justify-content:center;gap:10px;flex-wrap:wrap;margin:0 0 16px}
.preset-row-label{font-size:.85rem;font-weight:700;color:var(--text-3)}
.preset-select{display:flex;gap:8px;flex-wrap:wrap;justify-content:center}
.preset-btn{
  padding:7px 14px;border-radius:999px;border:1px solid var(--stroke-2);background:var(--card);
  color:var(--text-2);font-weight:700;font-size:.82rem;cursor:pointer;transition:.2s;font-family:inherit;
}
.preset-btn:hover{color:var(--text)}
.preset-btn[aria-pressed="true"]{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 10px 26px -14px rgba(139,92,246,.7)}

.tone-row{display:flex;align-items:center;justify-content:center;gap:8px;flex-wrap:wrap;margin:0 0 20px}
.tone-row-label{font-size:.85rem;font-weight:700;color:var(--text-3)}
.tone-btn{
  display:inline-flex;align-items:center;gap:5px;padding:6px 12px;border-radius:999px;
  border:1px solid var(--stroke-2);background:var(--card);color:var(--text-2);
  font-family:var(--mono);font-size:.8rem;font-weight:700;cursor:pointer;transition:.2s;
}
.tone-btn:hover{color:var(--text);border-color:var(--brand)}
.tone-btn.playing{background:var(--grad);color:#fff;border-color:transparent;box-shadow:0 10px 26px -14px rgba(139,92,246,.7)}
.tone-btn .ico{width:13px;height:13px}