/* Marketing Calculator Suite — Premium SaaS Design */
:root{
  --bg:#ffffff;
  --bg-elev:#ffffff;
  --surface:#f6f7fb;
  --surface-2:#eef0f7;
  --text:#0a0b14;
  --text-muted:#5a6378;
  --border:rgba(15,18,35,.08);
  --border-strong:rgba(15,18,35,.14);
  --primary:#5b5bf7;
  --primary-2:#7c4dff;
  --accent:#22d3ee;
  --success:#10b981;
  --grad-hero:radial-gradient(60% 80% at 20% 0%, rgba(124,77,255,.18), transparent 60%), radial-gradient(50% 60% at 90% 10%, rgba(34,211,238,.16), transparent 60%);
  --grad-brand:linear-gradient(135deg,#5b5bf7 0%,#7c4dff 50%,#22d3ee 120%);
  --grad-text:linear-gradient(135deg,#0a0b14 0%,#3a2bbf 60%,#22d3ee 120%);
  --shadow-sm:0 1px 2px rgba(15,18,35,.06);
  --shadow-md:0 10px 30px -10px rgba(15,18,35,.18);
  --shadow-lg:0 30px 80px -30px rgba(91,91,247,.45);
  --radius:14px;
  --radius-lg:22px;
  --max-w:1180px;
  --font-display:"Plus Jakarta Sans",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
  --font-body:"Inter",ui-sans-serif,system-ui,-apple-system,"Segoe UI",Roboto,sans-serif;
}
[data-theme="dark"]{
  --bg:#070814;
  --bg-elev:#0c0f1f;
  --surface:#0f1326;
  --surface-2:#171c33;
  --text:#eef0fa;
  --text-muted:#9aa3c0;
  --border:rgba(255,255,255,.08);
  --border-strong:rgba(255,255,255,.14);
  --primary:#8b8bff;
  --primary-2:#a78bfa;
  --grad-hero:radial-gradient(60% 80% at 20% 0%, rgba(124,77,255,.28), transparent 60%), radial-gradient(50% 60% at 90% 10%, rgba(34,211,238,.18), transparent 60%);
  --grad-text:linear-gradient(135deg,#ffffff 0%,#b9b3ff 50%,#22d3ee 120%);
  --shadow-lg:0 30px 80px -30px rgba(0,0,0,.7);
}

*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{
  margin:0;
  font-family:var(--font-body);
  background:var(--bg);
  color:var(--text);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
}
img{max-width:100%;display:block}
a{color:var(--primary);text-decoration:none;transition:color .15s}
a:hover{color:var(--primary-2)}
h1,h2,h3,h4{font-family:var(--font-display);letter-spacing:-.02em;line-height:1.15;margin:0 0 .4em;color:var(--text)}
h1{font-weight:800}
h2{font-weight:700}
.container{max-width:var(--max-w);margin:0 auto;padding:0 22px}

/* Nav */
.site-nav{position:sticky;top:0;z-index:50;background:color-mix(in srgb,var(--bg) 78%,transparent);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;padding:14px 22px;max-width:var(--max-w);margin:0 auto;gap:16px}
.brand{font-family:var(--font-display);font-weight:800;font-size:18px;color:var(--text);display:inline-flex;align-items:center;gap:8px;letter-spacing:-.02em}
.brand-mark{width:28px;height:28px;border-radius:8px;background:var(--grad-brand);box-shadow:0 6px 16px -6px rgba(91,91,247,.7);position:relative}
.brand-mark::after{content:"";position:absolute;inset:6px;border-radius:4px;background:rgba(255,255,255,.18)}
.brand small{display:block;font-size:10px;font-weight:600;color:var(--text-muted);letter-spacing:.04em;text-transform:uppercase;margin-top:1px}
.nav-links{display:flex;align-items:center;gap:4px;list-style:none;margin:0;padding:0}
.nav-links a{color:var(--text-muted);padding:8px 12px;border-radius:9px;font-weight:500;font-size:14px}
.nav-links a:hover{color:var(--text);background:var(--surface)}
.nav-links a.active{color:var(--text);background:var(--surface-2)}
.nav-actions{display:flex;gap:8px;align-items:center}
.icon-btn{background:var(--surface);border:1px solid var(--border);color:var(--text);width:38px;height:38px;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;font-size:15px;transition:.15s}
.icon-btn:hover{background:var(--surface-2);border-color:var(--border-strong)}
.nav-toggle{display:none}
@media (max-width:880px){
  .nav-toggle{display:inline-flex}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--bg-elev);border-bottom:1px solid var(--border);flex-direction:column;padding:14px;gap:2px}
  .nav-links.open{display:flex}
  .nav-links a{width:100%}
}

/* Buttons */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:13px 22px;border-radius:12px;font-weight:600;font-size:15px;border:1px solid transparent;cursor:pointer;font-family:inherit;transition:transform .08s,box-shadow .2s,background .2s,color .2s;white-space:nowrap}
.btn-primary{background:var(--grad-brand);color:#fff;box-shadow:0 12px 28px -12px rgba(91,91,247,.7)}
.btn-primary:hover{transform:translateY(-1px);box-shadow:0 18px 36px -14px rgba(91,91,247,.85);color:#fff}
.btn-secondary{background:var(--surface);color:var(--text);border-color:var(--border-strong)}
.btn-secondary:hover{background:var(--surface-2)}
.btn-ghost{background:transparent;color:var(--text);border-color:var(--border-strong)}
.btn-ghost:hover{background:var(--surface)}
.btn:active{transform:translateY(1px)}
.btn-sm{padding:9px 14px;font-size:13px;border-radius:10px}

/* Hero */
.hero{position:relative;padding:96px 0 72px;overflow:hidden}
.hero::before{content:"";position:absolute;inset:0;background:var(--grad-hero);pointer-events:none;z-index:0}
.hero .container{position:relative;z-index:1}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:56px;align-items:center}
@media (max-width:980px){.hero-grid{grid-template-columns:1fr;gap:40px}}
.eyebrow{display:inline-flex;align-items:center;gap:8px;padding:6px 12px;border-radius:999px;background:color-mix(in srgb,var(--primary) 12%,transparent);color:var(--primary);font-size:12px;font-weight:600;border:1px solid color-mix(in srgb,var(--primary) 22%,transparent);margin-bottom:18px}
.eyebrow .dot{width:6px;height:6px;border-radius:50%;background:var(--primary);box-shadow:0 0 0 4px color-mix(in srgb,var(--primary) 20%,transparent)}
.hero h1{font-size:clamp(40px,6vw,68px);line-height:1.05;margin:0 0 18px;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero .lead{font-size:clamp(16px,1.6vw,19px);color:var(--text-muted);max-width:560px;margin:0 0 28px}
.hero-cta{display:flex;gap:12px;flex-wrap:wrap}
.trust{margin-top:30px;display:flex;gap:22px;flex-wrap:wrap;color:var(--text-muted);font-size:13px}
.trust span{display:inline-flex;align-items:center;gap:6px}
.trust svg{width:16px;height:16px;color:var(--success)}

/* Hero calculator card */
.hero-card{position:relative;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-lg);backdrop-filter:blur(12px)}
.hero-card::before{content:"";position:absolute;inset:-1px;border-radius:inherit;padding:1px;background:var(--grad-brand);-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:.5;pointer-events:none}
.hero-card .tag{display:inline-block;font-size:11px;font-weight:700;color:var(--primary);background:color-mix(in srgb,var(--primary) 12%,transparent);padding:4px 10px;border-radius:999px;text-transform:uppercase;letter-spacing:.06em;margin-bottom:10px}
.hero-card h3{margin:0 0 16px;font-size:20px}
.float-card{position:absolute;background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;padding:12px 16px;box-shadow:var(--shadow-md);font-size:13px;font-weight:600;display:flex;align-items:center;gap:10px;animation:floaty 6s ease-in-out infinite}
.float-card .pill{width:28px;height:28px;border-radius:8px;background:var(--grad-brand);display:grid;place-items:center;color:#fff;font-size:12px;font-weight:800}
.float-card.f1{top:-18px;right:-18px;animation-delay:-1s}
.float-card.f2{bottom:-18px;left:-22px;animation-delay:-3s}
.float-card small{display:block;color:var(--text-muted);font-weight:500;font-size:11px}
@keyframes floaty{0%,100%{transform:translateY(0)}50%{transform:translateY(-8px)}}

/* Stats */
.stats{display:grid;grid-template-columns:repeat(4,1fr);gap:18px;margin-top:48px}
@media (max-width:720px){.stats{grid-template-columns:repeat(2,1fr)}}
.stat{background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;padding:18px}
.stat .num{font-family:var(--font-display);font-weight:800;font-size:28px;letter-spacing:-.02em;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent}
.stat .lbl{color:var(--text-muted);font-size:13px;margin-top:2px}

/* Sections */
section{padding:72px 0;position:relative}
section.alt{background:var(--surface)}
section h2{font-size:clamp(26px,3.4vw,38px);margin:0 0 12px}
section .section-lead{color:var(--text-muted);max-width:680px;font-size:17px}

/* Cards grid */
.card-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(250px,1fr));gap:20px;margin-top:36px}
.card{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius);padding:24px;transition:transform .2s,box-shadow .2s,border-color .2s;position:relative;overflow:hidden}
.card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--border-strong)}
.card h3{margin:0 0 6px;font-size:19px}
.card p{color:var(--text-muted);margin:0;font-size:14.5px}
.card .ico{width:42px;height:42px;border-radius:11px;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-weight:800;margin-bottom:14px;box-shadow:0 10px 24px -10px rgba(91,91,247,.6)}
.card .tag{display:inline-block;background:color-mix(in srgb,var(--primary) 12%,transparent);color:var(--primary);font-size:11px;font-weight:700;padding:3px 9px;border-radius:999px;letter-spacing:.04em;text-transform:uppercase;margin-bottom:10px}
.card-link{margin-top:14px;display:inline-flex;align-items:center;gap:6px;font-weight:600;color:var(--primary);font-size:14px}

/* Calculator */
.calculator{background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-md);margin:28px 0 36px}
.calc-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));gap:16px}
.field label{display:block;font-size:13px;color:var(--text-muted);margin-bottom:6px;font-weight:600}
.field input{width:100%;padding:13px 14px;border-radius:11px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text);font-size:15px;font-family:inherit;transition:.15s}
.field input:focus{outline:3px solid color-mix(in srgb,var(--primary) 28%,transparent);border-color:var(--primary)}
.field .err{color:#ef4444;font-size:12px;margin-top:4px;min-height:14px}
.result{margin-top:22px;padding:22px;background:linear-gradient(135deg,color-mix(in srgb,var(--primary) 10%,var(--bg)),color-mix(in srgb,var(--accent) 10%,var(--bg)));border:1px solid color-mix(in srgb,var(--primary) 28%,var(--border));border-radius:14px;display:flex;justify-content:space-between;align-items:center;gap:16px;flex-wrap:wrap;transition:transform .15s}
.result.pulse{animation:pulse .35s ease}
@keyframes pulse{0%{transform:scale(1)}50%{transform:scale(1.015)}100%{transform:scale(1)}}
.result-label{font-size:13px;color:var(--text-muted);font-weight:600;text-transform:uppercase;letter-spacing:.06em}
.result-value{font-family:var(--font-display);font-size:32px;font-weight:800;background:var(--grad-text);-webkit-background-clip:text;background-clip:text;color:transparent;letter-spacing:-.02em}
.result-actions{display:flex;gap:8px}
.formula{margin-top:14px;font-size:13.5px;color:var(--text-muted)}
.formula code{background:var(--surface-2);padding:3px 8px;border-radius:6px;color:var(--text);font-family:ui-monospace,SFMono-Regular,Menlo,monospace;font-size:13px}

/* Steps */
.steps{counter-reset:s;display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:18px;margin-top:20px}
.step{background:var(--bg-elev);border:1px solid var(--border);border-radius:14px;padding:20px;counter-increment:s;position:relative}
.step::before{content:counter(s);position:absolute;top:-14px;left:18px;width:30px;height:30px;border-radius:9px;background:var(--grad-brand);color:#fff;display:grid;place-items:center;font-weight:800;font-size:14px;box-shadow:0 8px 20px -8px rgba(91,91,247,.6)}
.step h4{margin:8px 0 6px;font-size:16px}
.step p{margin:0;color:var(--text-muted);font-size:14px}

/* Comparison table */
.table-wrap{overflow-x:auto;margin-top:24px;border:1px solid var(--border);border-radius:var(--radius);background:var(--bg-elev)}
table{width:100%;border-collapse:collapse}
th,td{padding:16px 18px;text-align:left;border-bottom:1px solid var(--border);font-size:15px}
th{background:var(--surface);font-weight:700;color:var(--text);font-size:13px;text-transform:uppercase;letter-spacing:.05em}
tr:last-child td{border-bottom:none}

/* FAQ */
.faq details{background:var(--bg-elev);border:1px solid var(--border);border-radius:12px;padding:16px 20px;margin-bottom:10px;transition:border-color .15s}
.faq details[open]{border-color:var(--border-strong)}
.faq summary{cursor:pointer;font-weight:600;color:var(--text);list-style:none;display:flex;justify-content:space-between;align-items:center;gap:10px;font-size:15px}
.faq summary::-webkit-details-marker{display:none}
.faq summary::after{content:"+";color:var(--primary);font-size:22px;line-height:1;transition:transform .2s;font-weight:300}
.faq details[open] summary::after{content:"−"}
.faq details p{margin:12px 0 0;color:var(--text-muted);font-size:14.5px}

/* Breadcrumbs */
.breadcrumbs{font-size:13px;color:var(--text-muted);padding:18px 0 0}
.breadcrumbs a{color:var(--text-muted)}
.breadcrumbs a:hover{color:var(--primary)}

/* Ad slot (must be empty) */
.ad-slot{min-height:90px;margin:36px auto;max-width:728px;display:block}

/* Prose */
.prose{max-width:820px;margin:0 auto}
.prose h2{margin-top:1.2em}
.prose h3{margin-top:1.4em;font-size:21px}
.prose p,.prose ul,.prose ol{color:var(--text-muted);font-size:16px}
.prose ul,.prose ol{padding-left:22px}
.prose li{margin:6px 0}
.prose strong{color:var(--text)}
.prose blockquote{border-left:3px solid var(--primary);padding:8px 16px;color:var(--text);background:var(--surface);border-radius:0 10px 10px 0;margin:18px 0}

/* CTA banner */
.cta-banner{margin:0;padding:64px 0;background:var(--grad-brand);color:#fff;text-align:center}
.cta-banner h2{color:#fff;margin-bottom:10px;font-size:clamp(24px,3vw,34px)}
.cta-banner p{color:rgba(255,255,255,.85);max-width:600px;margin:0 auto 22px}
.cta-banner .btn-secondary{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.3);backdrop-filter:blur(10px)}
.cta-banner .btn-secondary:hover{background:rgba(255,255,255,.24)}
.cta-banner .btn-primary{background:#fff;color:var(--primary);box-shadow:0 18px 40px -16px rgba(0,0,0,.4)}
.cta-banner .btn-primary:hover{background:#fff;color:var(--primary-2)}

/* Footer */
.site-footer{border-top:1px solid var(--border);background:var(--bg-elev);padding:56px 0 28px;margin-top:60px}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr 1fr;gap:36px}
@media (max-width:780px){.footer-grid{grid-template-columns:1fr 1fr;gap:28px}}
.footer-grid h4{margin:0 0 12px;font-size:13px;text-transform:uppercase;letter-spacing:.06em;color:var(--text-muted);font-weight:700}
.footer-grid ul{list-style:none;padding:0;margin:0}
.footer-grid li{margin:7px 0}
.footer-grid a{color:var(--text);font-size:14px;opacity:.85}
.footer-grid a:hover{color:var(--primary);opacity:1}
.footer-about p{color:var(--text-muted);font-size:14px;margin:12px 0 0;max-width:300px}
.footer-bottom{text-align:center;color:var(--text-muted);font-size:13px;margin-top:36px;padding-top:22px;border-top:1px solid var(--border)}

/* Contact form */
.contact-form{display:grid;gap:14px;max-width:560px;background:var(--bg-elev);border:1px solid var(--border);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-md)}
.contact-form textarea{width:100%;padding:13px 14px;border-radius:11px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text);font-family:inherit;font-size:15px;min-height:130px;resize:vertical}
.contact-form input{width:100%;padding:13px 14px;border-radius:11px;border:1px solid var(--border-strong);background:var(--bg);color:var(--text);font-family:inherit;font-size:15px}
.contact-form input:focus,.contact-form textarea:focus{outline:3px solid color-mix(in srgb,var(--primary) 28%,transparent);border-color:var(--primary)}

/* Toast */
.toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(20px);background:var(--text);color:var(--bg);padding:11px 18px;border-radius:10px;font-size:14px;font-weight:600;box-shadow:var(--shadow-lg);opacity:0;pointer-events:none;transition:.25s;z-index:100}
.toast.show{opacity:1;transform:translateX(-50%) translateY(0)}

/* Animations */
@media (prefers-reduced-motion:no-preference){
  .reveal{opacity:0;transform:translateY(14px);transition:opacity .6s ease,transform .6s ease}
  .reveal.in{opacity:1;transform:translateY(0)}
}