/* ============================================================
   SONO — sono.co public site
   Warmer public variant of the SONO Web Style Guide.
   Core rules kept: Helvetica Neue only · thin big numbers ·
   uppercase wide-tracked labels · hairlines not boxes ·
   no shadows · radii 14 / 8 / 999 · white is the only accent
   on dark; black is the only accent on light.
   ============================================================ */

:root{
  /* dark tokens (nav, hero, footer, invest surfaces) */
  --bg:#000000;
  --bg2:#0a0a0a;
  --panel:#0e0e0e;
  --panel2:#161616;
  --ink:#ffffff;
  --muted:#8a8a8a;
  --faint:#666666;
  --line:#222222;
  --line2:#2c2c2c;

  /* light tokens (public education sections) */
  --lt-bg:#ffffff;
  --lt-bg2:#f6f6f4;
  --lt-panel:#fafaf8;
  --lt-ink:#111111;
  --lt-muted:#5c5c5c;
  --lt-faint:#8a8a8a;
  --lt-line:#e4e4e0;
  --lt-line2:#d2d2cc;

  /* status — soft, desaturated only */
  --good:#7ed085;  --good-bg:rgba(126,208,133,.09);
  --warn:#d9c98a;  --warn-bg:rgba(217,201,138,.09);
  --bad:#d98a8a;   --bad-bg:rgba(217,138,138,.09);
  --neutral:#8a8a8a; --neutral-bg:#161616;

  --font:"Helvetica Neue",-apple-system,BlinkMacSystemFont,"Segoe UI",Arial,sans-serif;
  --maxw:1080px;
}

*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth}
body{font-family:var(--font);background:var(--lt-bg);color:var(--lt-ink);font-size:15px;line-height:1.6;-webkit-font-smoothing:antialiased}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 28px}

/* ---------- type ---------- */
.eyebrow{font-size:10px;font-weight:600;letter-spacing:.2em;text-transform:uppercase;color:var(--faint)}
.light .eyebrow{color:var(--lt-faint)}
h1{font-weight:300;font-size:38px;line-height:1.15;letter-spacing:-.5px}
h1 strong,h2 strong{font-weight:700}
h2{font-weight:300;font-size:30px;line-height:1.2;letter-spacing:-.3px}
h3{font-weight:600;font-size:17px}
.lede{font-size:16px;color:var(--muted);max-width:640px}
.light .lede{color:var(--lt-muted)}
@media(max-width:640px){h1{font-size:30px}h2{font-size:25px}}

/* ---------- nav ---------- */
.nav{background:var(--bg);border-bottom:1px solid var(--line);position:sticky;top:0;z-index:50}
.nav-inner{max-width:var(--maxw);margin:0 auto;padding:0 28px;height:64px;display:flex;align-items:center;gap:28px}
.nav-logo img{height:24px;width:auto}
.nav-links{display:flex;gap:24px;margin-left:auto;align-items:center}
.nav-links a{font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--muted);transition:color .15s}
.nav-links a:hover,.nav-links a.active{color:var(--ink)}
.btn-login{border:1px solid var(--line2);color:var(--ink)!important;padding:9px 18px;border-radius:8px;transition:border-color .15s,background .15s}
.btn-login:hover{border-color:#555;background:var(--panel2)}
.nav-toggle{display:none;margin-left:auto;background:none;border:1px solid var(--line2);color:var(--ink);border-radius:8px;padding:8px 12px;font-family:var(--font);font-size:11px;letter-spacing:.12em;text-transform:uppercase;cursor:pointer}
@media(max-width:820px){
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg);border-bottom:1px solid var(--line);flex-direction:column;padding:20px 28px;gap:18px;align-items:flex-start}
  .nav-links.open{display:flex}
  .nav-toggle{display:block}
  .nav-links .btn-login{margin-left:0}
}

/* ---------- sections ---------- */
.dark{background:var(--bg);color:var(--ink)}
.light{background:var(--lt-bg);color:var(--lt-ink)}
.light-alt{background:var(--lt-bg2);color:var(--lt-ink)}
section{padding:72px 0}
.hero{padding:104px 0 88px}
.hero .lede{margin-top:18px}
.section-head{margin-bottom:40px}
.section-head .eyebrow{display:block;margin-bottom:12px}
.hr{border:none;border-top:1px solid var(--line);margin:0}
.light .hr,.light-alt .hr{border-top-color:var(--lt-line)}

/* ---------- buttons ---------- */
.btn{display:inline-block;padding:13px 26px;border-radius:8px;font-size:12px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;transition:opacity .15s,border-color .15s;cursor:pointer;border:1px solid transparent}
.btn-white{background:var(--ink);color:#000}
.btn-white:hover{opacity:.85}
.btn-ghost{border-color:var(--line2);color:var(--ink)}
.btn-ghost:hover{border-color:#555}
.btn-black{background:var(--lt-ink);color:#fff}
.btn-black:hover{opacity:.85}
.btn-outline{border-color:var(--lt-line2);color:var(--lt-ink)}
.btn-outline:hover{border-color:var(--lt-ink)}
.btn-row{display:flex;gap:14px;flex-wrap:wrap;margin-top:32px}

/* ---------- stat cells ---------- */
.stats{display:grid;grid-template-columns:repeat(4,1fr);border:1px solid var(--line);border-radius:14px;overflow:hidden;background:var(--panel)}
.stat{padding:26px 24px;border-right:1px solid var(--line)}
.stat:last-child{border-right:none}
.stat .k{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);margin-bottom:10px}
.stat .v{font-size:32px;font-weight:300;letter-spacing:-.5px;line-height:1.1}
.stat .d{font-size:12px;color:var(--muted);margin-top:8px}
.light .stats,.light-alt .stats{background:var(--lt-panel);border-color:var(--lt-line)}
.light .stat,.light-alt .stat{border-right-color:var(--lt-line)}
.light .stat .k,.light-alt .stat .k{color:var(--lt-faint)}
.light .stat .d,.light-alt .stat .d{color:var(--lt-muted)}
@media(max-width:820px){.stats{grid-template-columns:repeat(2,1fr)}.stat:nth-child(2n){border-right:none}.stat:nth-child(-n+2){border-bottom:1px solid var(--line)}
.light .stat:nth-child(-n+2),.light-alt .stat:nth-child(-n+2){border-bottom-color:var(--lt-line)}}
@media(max-width:460px){.stats{grid-template-columns:1fr}.stat{border-right:none;border-bottom:1px solid var(--line)}.stat:last-child{border-bottom:none}}

/* ---------- cards ---------- */
.cards{display:grid;gap:20px}
.cards.c2{grid-template-columns:repeat(2,1fr)}
.cards.c3{grid-template-columns:repeat(3,1fr)}
@media(max-width:820px){.cards.c2,.cards.c3{grid-template-columns:1fr}}
.card{border:1px solid var(--line);border-radius:14px;padding:28px;background:var(--panel);transition:border-color .15s,background .15s}
.card:hover{border-color:var(--line2);background:#101010}
.card h3{margin-bottom:10px}
.card p{color:var(--muted);font-size:14px}
.card .eyebrow{display:block;margin-bottom:14px}
.light .card,.light-alt .card{background:var(--lt-panel);border-color:var(--lt-line)}
.light .card:hover,.light-alt .card:hover{border-color:var(--lt-line2);background:#f2f2ee}
.light .card p,.light-alt .card p{color:var(--lt-muted)}
a.card{display:block}
.card-link{font-size:11px;font-weight:600;letter-spacing:.14em;text-transform:uppercase;margin-top:18px;display:inline-block}

/* ---------- pills ---------- */
.pill{display:inline-block;padding:4px 12px;border-radius:999px;font-size:10px;font-weight:600;letter-spacing:.1em;text-transform:uppercase}
.pill-good{background:var(--good-bg);color:var(--good)}
.pill-warn{background:var(--warn-bg);color:var(--warn)}
.pill-neutral{background:var(--neutral-bg);color:var(--neutral)}
.light .pill-neutral,.light-alt .pill-neutral{background:#ececea;color:var(--lt-muted)}

/* ---------- rate table ---------- */
.rate-table{width:100%;border:1px solid var(--line);border-radius:14px;border-collapse:separate;border-spacing:0;overflow:hidden;background:var(--panel)}
.rate-table th{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);text-align:left;padding:16px 24px;border-bottom:1px solid var(--line)}
.rate-table td{padding:18px 24px;border-bottom:1px solid var(--line);font-size:14px;color:var(--muted)}
.rate-table tr:last-child td{border-bottom:none}
.rate-table td.rate{font-size:24px;font-weight:300;color:var(--ink);letter-spacing:-.5px}

/* ---------- module list ---------- */
.mod{display:flex;gap:22px;padding:24px 0;border-bottom:1px solid var(--lt-line)}
.mod:last-child{border-bottom:none}
.mod .num{font-size:26px;font-weight:300;color:var(--lt-faint);min-width:44px;letter-spacing:-.5px}
.mod h3{margin-bottom:6px}
.mod p{color:var(--lt-muted);font-size:14px}

/* ---------- steps ---------- */
.steps{counter-reset:step}
.step{display:flex;gap:18px;padding:16px 0;align-items:baseline}
.step .dot{width:6px;height:6px;border-radius:999px;background:var(--lt-ink);flex-shrink:0;position:relative;top:-2px}

/* ---------- footer ---------- */
footer{background:var(--bg);color:var(--muted);border-top:1px solid var(--line);padding:56px 0 40px;font-size:13px}
.foot-grid{display:grid;grid-template-columns:2fr 1fr 1fr 1fr;gap:32px;margin-bottom:40px}
@media(max-width:820px){.foot-grid{grid-template-columns:1fr 1fr}}
footer img{height:18px;width:auto;margin-bottom:16px}
footer h4{font-size:10px;font-weight:600;letter-spacing:.18em;text-transform:uppercase;color:var(--faint);margin-bottom:14px}
footer a{display:block;color:var(--muted);margin-bottom:8px;transition:color .15s}
footer a:hover{color:var(--ink)}
.foot-legal{border-top:1px solid var(--line);padding-top:24px;font-size:12px;color:var(--faint)}

/* ---------- misc ---------- */
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:48px;align-items:start}
@media(max-width:820px){.two-col{grid-template-columns:1fr}}
.quote{border-left:1px solid var(--lt-line2);padding-left:24px;font-size:17px;font-weight:300;color:var(--lt-muted);font-style:italic}
.dark .quote{border-left-color:var(--line2);color:var(--muted)}
.kv{display:flex;justify-content:space-between;padding:14px 0;border-bottom:1px solid var(--line);font-size:14px}
.kv:last-child{border-bottom:none}
.kv .k2{color:var(--faint);font-size:10px;font-weight:600;letter-spacing:.16em;text-transform:uppercase}
.kv .v2{color:var(--ink)}
.light .kv,.light-alt .kv{border-bottom-color:var(--lt-line)}
.light .kv .k2,.light-alt .kv .k2{color:var(--lt-faint)}
.light .kv .v2,.light-alt .kv .v2{color:var(--lt-ink)}