/* ==============================================================
   ChemVeda Pro — Public homepage
   Same brand tokens as app.html so the hand-off feels seamless.
   ============================================================== */
*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
html,body{background:#0a0616;color:#e9e6f2;font-family:'Inter',system-ui,sans-serif;-webkit-font-smoothing:antialiased;overflow-x:hidden}
a{color:inherit;text-decoration:none}
button{font:inherit;color:inherit;background:none;border:none;cursor:pointer}
img{max-width:100%;display:block}
::selection{background:#a259ff55;color:#fff}

:root{
  --bg:#0a0616;
  --surface:rgba(255,255,255,.04);
  --surface-2:rgba(255,255,255,.07);
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.16);
  --text:#e9e6f2;
  --text-dim:#a89ec7;
  --text-mute:#6b6188;
  --purple:#a259ff;
  --purple-2:#7c3aed;
  --green:#4ade80;
  --green-2:#22c55e;
  --red:#f87171;
  --amber:#fbbf24;
  --blue:#60a5fa;
  --radius:16px;
  --radius-lg:26px;
}

h1,h2,h3{font-family:'Space Grotesk',sans-serif;letter-spacing:-.01em;color:#fff;line-height:1.1}
.muted{color:var(--text-dim)}
.container{max-width:1180px;margin:0 auto;padding:0 24px}

/* ---------- ambient page glow ---------- */
body::before,body::after{content:"";position:fixed;pointer-events:none;z-index:0;filter:blur(90px);opacity:.4}
body::before{top:-12%;left:-10%;width:55vw;height:55vw;background:radial-gradient(closest-side,#7c3aed,transparent 70%)}
body::after{bottom:-18%;right:-14%;width:60vw;height:60vw;background:radial-gradient(closest-side,#16a34a,transparent 70%);opacity:.28}

/* ---------- header ---------- */
.site-header{position:sticky;top:0;z-index:50;background:linear-gradient(180deg,rgba(10,6,22,.9),rgba(10,6,22,.55));backdrop-filter:blur(14px);border-bottom:1px solid var(--border)}
.site-header-inner{display:flex;align-items:center;gap:20px;padding:14px 24px;max-width:1180px;margin:0 auto}
.brand{display:flex;align-items:center;gap:10px}
.brand-mark{width:38px;height:38px;border-radius:11px;background:linear-gradient(135deg,#a259ff,#22c55e);display:grid;place-items:center;font-family:'Space Grotesk';font-weight:700;color:#fff;font-size:1.1rem;flex-shrink:0}
.brand-name{font-family:'Space Grotesk';font-weight:700;font-size:1.15rem;white-space:nowrap}
.brand-name span{background:linear-gradient(90deg,#a259ff,#22c55e);-webkit-background-clip:text;background-clip:text;color:transparent}
.site-nav{display:flex;gap:4px;margin-left:12px}
.site-nav a{padding:9px 14px;border-radius:10px;font-size:.92rem;color:var(--text-dim);font-weight:500;transition:background .15s ease,color .15s ease}
.site-nav a:hover{background:var(--surface-2);color:#fff}
.header-actions{display:flex;align-items:center;gap:10px;margin-left:auto}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:10px 18px;border-radius:11px;font-weight:600;font-size:.9rem;transition:transform .15s ease,box-shadow .2s ease,background .2s ease;white-space:nowrap}
.btn:active{transform:translateY(1px)}
.btn-primary{background:linear-gradient(135deg,#a259ff,#7c3aed);color:#fff;box-shadow:0 8px 24px -10px rgba(162,89,255,.7)}
.btn-primary:hover{box-shadow:0 12px 28px -8px rgba(162,89,255,.85)}
.btn-ghost{background:var(--surface-2);border:1px solid var(--border);color:var(--text)}
.btn-ghost:hover{background:rgba(255,255,255,.1)}
.nav-toggle{display:none;margin-left:auto;width:38px;height:38px;border-radius:10px;background:var(--surface-2);border:1px solid var(--border);align-items:center;justify-content:center}
.nav-toggle svg{width:20px;height:20px}

/* ---------- hero ---------- */
.hero{position:relative;min-height:min(92vh,880px);display:flex;align-items:center;overflow:hidden;border-bottom:1px solid var(--border)}
.hero-canvas{position:absolute;inset:0;width:100%;height:100%;z-index:0}
.hero-scrim{position:absolute;inset:0;z-index:1;background:radial-gradient(ellipse 60% 70% at 18% 45%,rgba(10,6,22,.82) 0%,rgba(10,6,22,.35) 55%,transparent 80%);pointer-events:none}
.hero-inner{position:relative;z-index:2;padding:60px 24px;max-width:1180px;margin:0 auto;width:100%}
.hero-copy{max-width:600px}
.eyebrow{display:inline-flex;align-items:center;gap:8px;font-size:.82rem;font-weight:600;color:#c4b5fd;background:rgba(162,89,255,.14);border:1px solid rgba(162,89,255,.3);padding:6px 14px;border-radius:999px;margin-bottom:20px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--green);box-shadow:0 0 0 3px rgba(74,222,128,.25)}
.hero h1{font-size:clamp(2.1rem,5vw,3.4rem);font-weight:700;margin-bottom:18px}
.hero h1 .accent{background:linear-gradient(90deg,#a259ff,#4ade80);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:1.05rem;line-height:1.6;color:var(--text-dim);max-width:520px;margin-bottom:30px}
.hero-cta{display:flex;flex-wrap:wrap;gap:12px;margin-bottom:34px}
.hero-cta .btn{padding:13px 24px;font-size:.95rem}
.stat-row{display:flex;flex-wrap:wrap;gap:10px}
.stat-chip{display:inline-flex;align-items:center;gap:8px;padding:9px 16px;border-radius:999px;background:rgba(255,255,255,.05);border:1px solid var(--border);font-size:.85rem;color:var(--text-dim)}
.stat-chip b{color:#fff;font-family:'Space Grotesk';font-weight:600}
.pulse-dot{width:8px;height:8px;border-radius:50%;background:var(--green);position:relative}
.pulse-dot::before{content:"";position:absolute;inset:-4px;border-radius:50%;background:var(--green);opacity:.5;animation:pulse-ring 1.8s ease-out infinite}
@keyframes pulse-ring{0%{transform:scale(.6);opacity:.55}100%{transform:scale(2.2);opacity:0}}
#statRow{display:none}
#statRow.ready{display:flex}

/* ---------- sections ---------- */
section{position:relative;z-index:1}
.section-pad{padding:76px 24px}
.section-head{max-width:620px;margin-bottom:40px}
.section-head .eyebrow{margin-bottom:14px}
.section-head h2{font-size:clamp(1.5rem,3vw,2.1rem);margin-bottom:12px}
.section-head p{color:var(--text-dim);font-size:1rem;line-height:1.6}

.feature-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:18px}
.feature-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);padding:26px;display:flex;flex-direction:column;gap:14px;transition:border-color .2s ease,transform .2s ease;cursor:pointer}
.feature-card:hover{border-color:var(--border-strong);transform:translateY(-3px)}
.feature-icon{width:46px;height:46px;border-radius:12px;display:grid;place-items:center}
.feature-icon svg{width:24px;height:24px}
.feature-icon.purple{background:rgba(162,89,255,.16);color:#d4b8ff}
.feature-icon.green{background:rgba(74,222,128,.16);color:#86efac}
.feature-icon.blue{background:rgba(96,165,250,.16);color:#93c5fd}
.feature-icon.amber{background:rgba(251,191,36,.16);color:#fde68a}
.feature-card h3{font-size:1.08rem;margin-bottom:2px}
.feature-card p{color:var(--text-dim);font-size:.92rem;line-height:1.55;flex:1}
.feature-card .go{font-size:.85rem;font-weight:600;color:#c4b5fd;display:inline-flex;align-items:center;gap:6px}
.feature-card:hover .go{color:#fff}

/* ---------- how it works ---------- */
.steps{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:24px;counter-reset:step}
.step{position:relative;padding-top:8px}
.step::before{counter-increment:step;content:counter(step);display:inline-flex;align-items:center;justify-content:center;width:34px;height:34px;border-radius:10px;background:linear-gradient(135deg,rgba(162,89,255,.3),rgba(74,222,128,.2));border:1px solid rgba(162,89,255,.4);font-family:'Space Grotesk';font-weight:700;color:#fff;margin-bottom:14px}
.step h3{font-size:1.02rem;margin-bottom:8px}
.step p{color:var(--text-dim);font-size:.9rem;line-height:1.55}

/* ---------- final CTA ---------- */
.cta-band{background:linear-gradient(135deg,rgba(162,89,255,.16),rgba(74,222,128,.08));border-top:1px solid var(--border);border-bottom:1px solid var(--border)}
.cta-band-inner{display:flex;flex-wrap:wrap;align-items:center;justify-content:space-between;gap:20px;max-width:1180px;margin:0 auto;padding:52px 24px}
.cta-band h2{font-size:1.6rem;margin-bottom:6px}
.cta-band p{color:var(--text-dim)}

/* ---------- footer ---------- */
footer{padding:36px 24px 100px}
.footer-inner{max-width:1180px;margin:0 auto;display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;align-items:center;border-top:1px solid var(--border);padding-top:24px}
.footer-links{display:flex;gap:18px;flex-wrap:wrap}
.footer-links a{font-size:.85rem;color:var(--text-dim)}
.footer-links a:hover{color:#fff}
.footer-note{font-size:.78rem;color:var(--text-mute)}

/* ---------- responsive ---------- */
@media (max-width:860px){
  .site-nav{display:none}
  .nav-toggle{display:flex}
  .header-actions .btn-ghost{display:none}
}
@media (max-width:560px){
  .hero{min-height:auto;padding-top:20px}
  .hero-inner{padding:40px 20px 50px}
  .section-pad{padding:52px 20px}
}
.mobile-nav{display:none;flex-direction:column;gap:2px;padding:10px 16px 16px;border-bottom:1px solid var(--border)}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:11px 6px;border-radius:8px;color:var(--text-dim);font-size:.95rem}
.mobile-nav a:hover{background:var(--surface-2);color:#fff}

@media (prefers-reduced-motion: reduce){
  html{scroll-behavior:auto}
}

/* ---------- announcement bar ---------- */
.announce-bar{background:linear-gradient(90deg,rgba(162,89,255,.22),rgba(74,222,128,.14));border-bottom:1px solid var(--border)}
.announce-inner{display:flex;align-items:center;justify-content:space-between;gap:16px;padding:10px 24px;font-size:.88rem;color:#e9e6f2}
.announce-inner button{color:var(--text-dim);font-size:1rem;line-height:1;padding:2px 4px}
.announce-inner button:hover{color:#fff}

/* ---------- public feed (no login required) ---------- */
.pub-block{margin-bottom:34px}
.pub-block:last-child{margin-bottom:0}
.pub-h{font-size:1.02rem;margin-bottom:14px}
.pub-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:14px}
.pub-item{display:flex;flex-direction:column;gap:8px;padding:16px;border-radius:14px;background:var(--surface);border:1px solid var(--border);transition:border-color .15s ease,transform .15s ease}
a.pub-item:hover{border-color:var(--border-strong);transform:translateY(-2px)}
.pub-icon{width:36px;height:36px;border-radius:10px;display:grid;place-items:center;font-size:1rem}
.pub-icon.yt{background:rgba(248,113,113,.18);color:#fca5a5}
.pub-icon.pdf{background:rgba(96,165,250,.18);color:#93c5fd}
.pub-icon.ann{background:rgba(251,191,36,.18);color:#fde68a}
.pub-item b{font-size:.95rem;color:#fff}
.pub-item small{color:var(--text-dim);font-size:.8rem;line-height:1.4}
.pub-item .pub-date{color:var(--text-mute);font-size:.72rem}
.pub-empty{grid-column:1/-1;padding:24px;text-align:center;color:var(--text-dim);border:1px dashed var(--border);border-radius:14px;font-size:.9rem}
.pub-skel{height:96px;border-radius:14px;background:linear-gradient(90deg,rgba(255,255,255,.04),rgba(255,255,255,.08),rgba(255,255,255,.04));background-size:200% 100%;animation:pubsk 1.4s infinite}
@keyframes pubsk{to{background-position:-200% 0}}

/* ---------- support ---------- */
.support-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:18px}
.support-card{display:flex;flex-direction:column;gap:8px;padding:24px;background:var(--surface);border:1px solid var(--border);border-radius:var(--radius);transition:border-color .2s,transform .2s}
a.support-card:hover{border-color:var(--border-strong);transform:translateY(-3px)}
.support-card h3{font-size:1.1rem}
.support-card p{color:var(--text-dim);font-size:.92rem}
.support-card .go{margin-top:auto;color:var(--purple);font-weight:600;font-size:.9rem}
.support-input{width:100%;padding:11px 14px;border-radius:12px;border:1px solid var(--border-strong);background:rgba(0,0,0,.25);color:var(--text);font:inherit;margin-top:4px}
.support-actions{display:flex;gap:8px;margin-top:6px}
.support-actions .btn{flex:1;text-align:center;padding:10px 12px}
.wa-float{position:fixed;right:16px;bottom:16px;z-index:60;display:flex;align-items:center;gap:8px;padding:12px 16px;border-radius:999px;background:#22c55e;color:#04210f;font-weight:700;box-shadow:0 8px 24px -6px rgba(34,197,94,.6)}
.wa-float svg{width:22px;height:22px}
@media(max-width:820px){.support-grid{grid-template-columns:1fr}.wa-float span{display:none}.wa-float{padding:14px}}

/* ---------- marquee strip (under hero) ---------- */
.hero-marquee{overflow:hidden;border-bottom:1px solid var(--border);background:rgba(162,89,255,.06);-webkit-mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent);mask-image:linear-gradient(90deg,transparent,#000 8%,#000 92%,transparent)}
.marquee-track{display:flex;align-items:center;gap:28px;width:max-content;padding:14px 0;animation:marquee 38s linear infinite;will-change:transform}
.marquee-track span{white-space:nowrap;font-size:.92rem;font-weight:600;color:var(--text-dim)}
.marquee-track span:nth-child(odd){color:var(--text)}
.marquee-track span:nth-child(even){color:var(--purple);opacity:.7}
@keyframes marquee{from{transform:translateX(0)}to{transform:translateX(-50%)}}
@media(prefers-reduced-motion:reduce){.marquee-track{animation:none}}