/* =========================================================
   SipLingo — Landing page styles
   Brand: AI German tutor. Voice conversations.
   ========================================================= */

/* ---------- Fonts (self-hosted Montserrat, GDPR-friendly) ---------- */
@font-face{font-family:'Montserrat';font-style:normal;font-weight:400;font-display:swap;src:url('assets/fonts/montserrat-400.woff2') format('woff2');}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:500;font-display:swap;src:url('assets/fonts/montserrat-500.woff2') format('woff2');}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:600;font-display:swap;src:url('assets/fonts/montserrat-600.woff2') format('woff2');}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:700;font-display:swap;src:url('assets/fonts/montserrat-700.woff2') format('woff2');}
@font-face{font-family:'Montserrat';font-style:normal;font-weight:800;font-display:swap;src:url('assets/fonts/montserrat-800.woff2') format('woff2');}

/* ---------- Design tokens ---------- */
:root{
  --blue:#2563EB;
  --blue-dark:#1D4ED8;
  --indigo:#4F46E5;
  --green:#22C55E;
  --purple:#A855F7;
  --orange:#F59E0B;

  --ink:#0F172A;
  --slate:#334155;
  --muted:#64748B;
  --line:#E2E8F0;

  --bg:#FFFFFF;
  --bg-soft:#F5F7FF;
  --bg-lav:#EEF2FF;
  --bg-mint:#ECFDF5;

  --grad:linear-gradient(135deg,#2563EB 0%,#4F46E5 100%);
  --grad-soft:linear-gradient(160deg,#EEF2FF 0%,#F5F7FF 60%,#FFFFFF 100%);

  --shadow-sm:0 1px 2px rgba(15,23,42,.06),0 1px 3px rgba(15,23,42,.08);
  --shadow-md:0 10px 30px -12px rgba(15,23,42,.18);
  --shadow-lg:0 30px 60px -20px rgba(37,99,235,.35);
  --shadow-phone:0 40px 80px -24px rgba(15,23,42,.45);

  --r-sm:12px; --r-md:18px; --r-lg:26px; --r-pill:999px;
  --maxw:1160px;
  --nav-h:70px;
}

/* ---------- Reset / base ---------- */
*,*::before,*::after{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
html:focus-within{scroll-behavior:smooth}
body{
  margin:0;
  font-family:'Montserrat',-apple-system,BlinkMacSystemFont,'Segoe UI',Roboto,Helvetica,Arial,sans-serif;
  color:var(--slate);
  background:var(--bg);
  line-height:1.65;
  font-size:17px;
  -webkit-font-smoothing:antialiased;
  text-rendering:optimizeLegibility;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:var(--blue);text-decoration:none}
a:hover{color:var(--blue-dark)}
h1,h2,h3,h4{color:var(--ink);line-height:1.12;margin:0;font-weight:800;letter-spacing:-.02em}
p{margin:0}
ul{margin:0;padding:0;list-style:none}
:focus-visible{outline:3px solid rgba(37,99,235,.5);outline-offset:2px;border-radius:6px}

.container{width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}

.skip-link{position:absolute;left:-9999px;top:0;background:var(--ink);color:#fff;padding:12px 18px;border-radius:0 0 10px 0;z-index:200}
.skip-link:focus{left:0;color:#fff}

/* ---------- Buttons ---------- */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:9px;font-weight:700;font-size:16px;
  padding:14px 26px;border-radius:var(--r-pill);cursor:pointer;border:1px solid transparent;
  transition:transform .18s ease,box-shadow .25s ease,background .2s ease,color .2s ease;white-space:nowrap;font-family:inherit}
.btn-primary{background:var(--grad);color:#fff;box-shadow:0 10px 24px -8px rgba(37,99,235,.6)}
.btn-primary:hover{color:#fff;transform:translateY(-2px);box-shadow:0 16px 34px -10px rgba(37,99,235,.7)}
.btn-ghost{background:#fff;color:var(--ink);border-color:var(--line);box-shadow:var(--shadow-sm)}
.btn-ghost:hover{color:var(--ink);transform:translateY(-2px);border-color:#cbd5e1}
.btn-white{background:#fff;color:var(--blue)}
.btn-white:hover{color:var(--blue-dark);transform:translateY(-2px)}
.btn-lg{padding:16px 32px;font-size:17px}

/* ---------- Store badges ---------- */
.stores{display:flex;flex-wrap:wrap;gap:14px}
.store-badge{display:inline-flex;align-items:center;gap:11px;background:var(--ink);color:#fff;
  padding:11px 20px;border-radius:14px;min-width:180px;transition:transform .2s ease,box-shadow .25s ease;
  box-shadow:var(--shadow-md)}
.store-badge:hover{color:#fff;transform:translateY(-3px);box-shadow:0 18px 34px -14px rgba(15,23,42,.5)}
.store-badge svg{width:26px;height:26px;flex:none}
.store-badge .sb-text{display:flex;flex-direction:column;line-height:1.1;text-align:left}
.store-badge .sb-small{font-size:10.5px;font-weight:500;opacity:.85;letter-spacing:.02em}
.store-badge .sb-big{font-size:19px;font-weight:700;letter-spacing:-.01em}
.stores-light .store-badge{background:#fff;color:var(--ink);border:1px solid var(--line)}
.stores-light .store-badge:hover{color:var(--ink)}

/* ---------- Header ---------- */
.site-header{position:sticky;top:0;z-index:100;height:var(--nav-h);display:flex;align-items:center;
  background:rgba(255,255,255,.72);backdrop-filter:saturate(180%) blur(14px);-webkit-backdrop-filter:saturate(180%) blur(14px);
  border-bottom:1px solid transparent;transition:box-shadow .3s ease,border-color .3s ease}
.site-header.scrolled{box-shadow:0 6px 24px -14px rgba(15,23,42,.25);border-color:var(--line)}
.nav{display:flex;align-items:center;justify-content:space-between;width:100%;max-width:var(--maxw);margin-inline:auto;padding-inline:22px}
.brand{display:flex;align-items:center;gap:10px;font-weight:800;font-size:21px;color:var(--ink);letter-spacing:-.02em}
.brand:hover{color:var(--ink)}
.brand img{width:38px;height:38px}
.nav-links{display:flex;align-items:center;gap:30px}
.nav-links a{color:var(--slate);font-weight:600;font-size:15px;position:relative}
.nav-links a:hover{color:var(--ink)}
.nav-links a::after{content:"";position:absolute;left:0;bottom:-6px;height:2px;width:0;background:var(--blue);transition:width .25s ease}
.nav-links a:hover::after{width:100%}
.nav-cta{display:flex;align-items:center;gap:14px}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;padding:8px;color:var(--ink)}

/* ---------- Hero ---------- */
.hero{position:relative;padding:64px 0 72px;background:var(--grad-soft);overflow:hidden}
.hero-grid{display:grid;grid-template-columns:1.05fr .95fr;gap:40px;align-items:center}
.eyebrow{display:inline-flex;align-items:center;gap:9px;background:#fff;border:1px solid var(--line);
  color:var(--blue-dark);font-weight:700;font-size:13.5px;padding:7px 15px;border-radius:var(--r-pill);
  box-shadow:var(--shadow-sm);margin-bottom:22px}
.eyebrow .dot{width:8px;height:8px;border-radius:50%;background:var(--green);box-shadow:0 0 0 4px rgba(34,197,94,.2);animation:pulse 2s infinite}
.hero h1{font-size:clamp(2.4rem,5.2vw,4rem);letter-spacing:-.03em}
.hero h1 .accent{background:var(--grad);-webkit-background-clip:text;background-clip:text;color:transparent}
.hero-sub{font-size:clamp(1.05rem,1.6vw,1.28rem);color:var(--slate);margin:22px 0 30px;max-width:560px}
.hero .stores{margin-bottom:18px}
.hero-note{display:flex;align-items:center;gap:8px;color:var(--muted);font-size:14px;font-weight:600}
.hero-note svg{width:18px;height:18px;color:var(--green)}

/* hero art / phone */
.hero-art{position:relative;display:flex;justify-content:center;align-items:center;min-height:520px}
.phone{position:relative;z-index:2;width:300px;border-radius:44px;background:#0b1220;padding:12px;
  box-shadow:var(--shadow-phone);border:1px solid rgba(255,255,255,.12)}
.phone img{border-radius:33px;width:100%;display:block}
.phone-float{animation:float 6s ease-in-out infinite}
.blob{position:absolute;border-radius:50%;filter:blur(38px);opacity:.55;z-index:1}
.blob-1{width:320px;height:320px;background:#93c5fd;top:2%;right:6%;animation:float 9s ease-in-out infinite}
.blob-2{width:280px;height:280px;background:#c4b5fd;bottom:2%;left:2%;animation:float 11s ease-in-out infinite reverse}
.blob-3{width:180px;height:180px;background:#6ee7b7;top:44%;right:0;opacity:.4;animation:float 8s ease-in-out infinite}

/* floating stat chips around phone */
.chip{position:absolute;z-index:4;background:#fff;border:1px solid var(--line);border-radius:16px;
  padding:11px 15px;box-shadow:var(--shadow-md);display:flex;align-items:center;gap:11px;font-weight:700;color:var(--ink);font-size:14px}
.chip .chip-ico{width:34px;height:34px;border-radius:10px;display:grid;place-items:center;flex:none;color:#fff}
.chip small{display:block;font-weight:600;color:var(--muted);font-size:11.5px}
.chip-a{top:12%;left:-6%;animation:float 7s ease-in-out infinite}
.chip-b{bottom:16%;right:-8%;animation:float 8.5s ease-in-out infinite reverse}
.chip-c{bottom:2%;left:8%;animation:float 6.5s ease-in-out infinite}

/* ---------- Marquee / trust strip ---------- */
.strip{background:var(--ink);color:#fff}
.strip .container{display:flex;flex-wrap:wrap;justify-content:space-between;gap:20px;padding-block:26px}
.strip-item{display:flex;align-items:center;gap:12px;font-weight:600;font-size:15px;color:#cbd5e1}
.strip-item strong{color:#fff;font-weight:800;font-size:19px;letter-spacing:-.01em}
.strip-item svg{width:24px;height:24px;color:#93c5fd;flex:none}

/* ---------- Section shells ---------- */
section{scroll-margin-top:calc(var(--nav-h) + 12px)}
.section{padding:88px 0}
.section-head{max-width:680px;margin:0 auto 56px;text-align:center}
.kicker{display:inline-block;font-weight:800;font-size:13px;letter-spacing:.14em;text-transform:uppercase;color:var(--blue);margin-bottom:14px}
.section-head h2{font-size:clamp(1.9rem,3.6vw,2.7rem)}
.section-head p{margin-top:16px;font-size:1.1rem;color:var(--muted)}

/* ---------- Features (alternating) ---------- */
.feature{display:grid;grid-template-columns:1fr 1fr;gap:56px;align-items:center;padding:44px 0}
.feature:nth-child(even) .feature-media{order:2}
.feature-tag{display:inline-flex;align-items:center;gap:8px;font-weight:700;font-size:13px;padding:6px 13px;border-radius:var(--r-pill);margin-bottom:18px}
.feature h3{font-size:clamp(1.6rem,2.8vw,2.15rem);margin-bottom:16px}
.feature p{font-size:1.08rem;color:var(--slate);margin-bottom:22px}
.feature-list li{display:flex;align-items:flex-start;gap:12px;margin-bottom:13px;font-weight:600;color:var(--ink)}
.feature-list li svg{width:22px;height:22px;flex:none;margin-top:1px;color:var(--green)}
.feature-media{position:relative;display:flex;justify-content:center}
.feature-frame{position:relative;width:290px;border-radius:40px;background:#0b1220;padding:11px;box-shadow:var(--shadow-phone);border:1px solid rgba(255,255,255,.1)}
.feature-frame img{border-radius:30px;width:100%}
.feature-glow{position:absolute;inset:-8% 6% 0;border-radius:50%;filter:blur(50px);opacity:.5;z-index:-1}

/* color variants for tags/glow */
.v-blue .feature-tag{background:var(--bg-lav);color:var(--blue-dark)} .v-blue .feature-glow{background:#93c5fd}
.v-purple .feature-tag{background:#F5F0FF;color:#7c3aed} .v-purple .feature-glow{background:#ddd6fe}
.v-green .feature-tag{background:var(--bg-mint);color:#16a34a} .v-green .feature-glow{background:#a7f3d0}
.v-orange .feature-tag{background:#FFF7ED;color:#c2410c} .v-orange .feature-glow{background:#fed7aa}

/* ---------- How it works ---------- */
.how{background:var(--grad-soft)}
.steps{display:grid;grid-template-columns:repeat(3,1fr);gap:26px;counter-reset:step}
.step{position:relative;background:#fff;border:1px solid var(--line);border-radius:var(--r-lg);padding:36px 28px;box-shadow:var(--shadow-sm);transition:transform .25s ease,box-shadow .25s ease}
.step:hover{transform:translateY(-6px);box-shadow:var(--shadow-md)}
.step-num{width:52px;height:52px;border-radius:16px;background:var(--grad);color:#fff;display:grid;place-items:center;font-weight:800;font-size:22px;margin-bottom:22px;box-shadow:0 10px 22px -8px rgba(37,99,235,.6)}
.step h3{font-size:1.28rem;margin-bottom:10px}
.step p{color:var(--muted)}
.steps-connector{display:none}

/* ---------- Benefits grid ---------- */
.benefits{display:grid;grid-template-columns:repeat(3,1fr);gap:22px}
.benefit{background:#fff;border:1px solid var(--line);border-radius:var(--r-md);padding:30px 26px;transition:transform .25s ease,box-shadow .25s ease,border-color .25s}
.benefit:hover{transform:translateY(-5px);box-shadow:var(--shadow-md);border-color:#dbe3f0}
.benefit-ico{width:52px;height:52px;border-radius:14px;display:grid;place-items:center;margin-bottom:18px;color:#fff}
.benefit-ico svg{width:26px;height:26px}
.benefit h3{font-size:1.18rem;margin-bottom:9px}
.benefit p{color:var(--muted);font-size:.98rem}
.bg-blue{background:linear-gradient(135deg,#2563EB,#4F46E5)}
.bg-green{background:linear-gradient(135deg,#22C55E,#16A34A)}
.bg-purple{background:linear-gradient(135deg,#A855F7,#7C3AED)}
.bg-orange{background:linear-gradient(135deg,#F59E0B,#EA580C)}
.bg-cyan{background:linear-gradient(135deg,#06B6D4,#0891B2)}
.bg-pink{background:linear-gradient(135deg,#EC4899,#DB2777)}

/* ---------- Gallery ---------- */
.gallery{display:flex;gap:22px;overflow-x:auto;padding:10px 4px 26px;scroll-snap-type:x mandatory;-webkit-overflow-scrolling:touch}
.gallery::-webkit-scrollbar{height:8px}
.gallery::-webkit-scrollbar-thumb{background:#cbd5e1;border-radius:10px}
.gallery-item{flex:none;width:230px;scroll-snap-align:center;border-radius:32px;background:#0b1220;padding:9px;box-shadow:var(--shadow-md);border:1px solid rgba(255,255,255,.08)}
.gallery-item img{border-radius:24px;width:100%}

/* ---------- FAQ ---------- */
.faq{max-width:800px;margin-inline:auto}
.faq-item{border:1px solid var(--line);border-radius:var(--r-md);margin-bottom:14px;background:#fff;overflow:hidden;transition:box-shadow .25s ease,border-color .25s}
.faq-item[open]{box-shadow:var(--shadow-md);border-color:#dbe3f0}
.faq-item summary{list-style:none;cursor:pointer;padding:22px 24px;display:flex;align-items:center;justify-content:space-between;gap:16px;font-weight:700;color:var(--ink);font-size:1.06rem}
.faq-item summary::-webkit-details-marker{display:none}
.faq-item .faq-icon{flex:none;width:26px;height:26px;border-radius:50%;background:var(--bg-lav);color:var(--blue);display:grid;place-items:center;transition:transform .25s ease,background .25s}
.faq-item[open] .faq-icon{transform:rotate(45deg);background:var(--blue);color:#fff}
.faq-item .faq-body{padding:0 24px 24px;color:var(--slate);line-height:1.7}

/* ---------- Final CTA ---------- */
.cta-band{position:relative;overflow:hidden;background:var(--grad);color:#fff;border-radius:32px;padding:66px 40px;text-align:center;box-shadow:var(--shadow-lg)}
.cta-band h2{color:#fff;font-size:clamp(1.9rem,3.6vw,2.8rem);margin-bottom:16px}
.cta-band p{color:#dbeafe;font-size:1.15rem;max-width:560px;margin:0 auto 30px}
.cta-band .stores{justify-content:center}
.cta-band .blob{opacity:.4}
.cta-blob-1{width:360px;height:360px;background:#fff;top:-30%;right:-6%;opacity:.12;filter:blur(50px)}
.cta-blob-2{width:300px;height:300px;background:#a78bfa;bottom:-30%;left:-4%;opacity:.35;filter:blur:60px}

/* ---------- Footer ---------- */
.site-footer{background:var(--ink);color:#94a3b8;padding:64px 0 30px;margin-top:20px}
.footer-grid{display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:40px;padding-bottom:44px;border-bottom:1px solid rgba(255,255,255,.1)}
.footer-brand .brand{color:#fff}
.footer-brand p{margin:16px 0;max-width:280px;font-size:.96rem}
.footer-brand .made{display:inline-flex;align-items:center;gap:8px;font-size:13px;color:#64748b;font-weight:600}
.footer-col h4{color:#fff;font-size:.82rem;letter-spacing:.12em;text-transform:uppercase;margin-bottom:18px;font-weight:800}
.footer-col a,.footer-col button.linklike{color:#94a3b8;display:block;margin-bottom:12px;font-weight:600;font-size:.96rem;background:none;border:0;padding:0;cursor:pointer;font-family:inherit;text-align:left}
.footer-col a:hover,.footer-col button.linklike:hover{color:#fff}
.footer-stores .store-badge{min-width:0;width:100%;margin-bottom:12px}
.footer-bottom{display:flex;flex-wrap:wrap;gap:14px;justify-content:space-between;align-items:center;padding-top:26px;font-size:.9rem}
.footer-bottom a,.footer-bottom button.linklike{color:#94a3b8;background:none;border:0;cursor:pointer;font-family:inherit;font-size:.9rem;font-weight:600}
.footer-bottom a:hover,.footer-bottom button.linklike:hover{color:#fff}

/* ---------- Cookie banner ---------- */
.cookie{position:fixed;left:16px;right:16px;bottom:16px;z-index:150;max-width:560px;margin-inline:auto;
  background:#fff;border:1px solid var(--line);border-radius:var(--r-md);box-shadow:0 24px 60px -20px rgba(15,23,42,.5);
  padding:22px 24px;transform:translateY(160%);opacity:0;transition:transform .4s cubic-bezier(.2,.7,.2,1),opacity .4s;visibility:hidden}
.cookie.show{transform:translateY(0);opacity:1;visibility:visible}
.cookie h4{font-size:1.05rem;margin-bottom:8px;display:flex;align-items:center;gap:9px}
.cookie h4 svg{width:22px;height:22px;color:var(--blue)}
.cookie p{font-size:.92rem;color:var(--muted);margin-bottom:16px}
.cookie p a{font-weight:700}
.cookie-actions{display:flex;gap:12px;flex-wrap:wrap}
.cookie-actions .btn{flex:1;min-width:140px;padding:12px 18px;font-size:15px}

/* ---------- Reveal animation ---------- */
.reveal{opacity:0;transform:translateY(28px);transition:opacity .7s ease,transform .7s cubic-bezier(.2,.7,.2,1)}
.reveal.in{opacity:1;transform:none}
.reveal.d1{transition-delay:.08s}.reveal.d2{transition-delay:.16s}.reveal.d3{transition-delay:.24s}.reveal.d4{transition-delay:.32s}.reveal.d5{transition-delay:.4s}

/* ---------- Keyframes ---------- */
@keyframes float{0%,100%{transform:translateY(0)}50%{transform:translateY(-16px)}}
@keyframes pulse{0%{box-shadow:0 0 0 0 rgba(34,197,94,.4)}70%{box-shadow:0 0 0 8px rgba(34,197,94,0)}100%{box-shadow:0 0 0 0 rgba(34,197,94,0)}}

/* ---------- Responsive ---------- */
@media (max-width:960px){
  .hero-grid{grid-template-columns:1fr;gap:20px;text-align:center}
  .hero .eyebrow{margin-inline:auto}
  .hero-sub{margin-inline:auto}
  .hero .stores{justify-content:center}
  .hero-note{justify-content:center}
  .hero-art{min-height:440px;margin-top:10px}
  .feature{grid-template-columns:1fr;gap:34px;text-align:center}
  .feature:nth-child(even) .feature-media{order:0}
  .feature-list{display:inline-block;text-align:left}
  .feature-tag{margin-inline:auto}
  .steps{grid-template-columns:1fr;gap:18px}
  .benefits{grid-template-columns:1fr 1fr}
  .footer-grid{grid-template-columns:1fr 1fr;gap:32px}
}
@media (max-width:900px){
  .nav-links{display:none}
  .nav-toggle{display:inline-flex}
  .mobile-menu .nav-links{display:flex}
}
@media (max-width:680px){
  body{font-size:16px}
  .nav-cta .btn{display:none}
  .section{padding:64px 0}
  .benefits{grid-template-columns:1fr}
  .footer-grid{grid-template-columns:1fr}
  .cta-band{padding:48px 24px;border-radius:24px}
  .strip .container{justify-content:center;text-align:center}
  .chip-a{left:0}.chip-b{right:0}
}

/* ---------- Mobile menu ---------- */
.mobile-menu{position:fixed;inset:var(--nav-h) 0 auto 0;background:#fff;border-bottom:1px solid var(--line);
  box-shadow:var(--shadow-md);padding:20px 22px 26px;z-index:99;display:none;flex-direction:column;gap:18px}
.mobile-menu.open{display:flex;animation:slideDown .3s ease}
.mobile-menu .nav-links{flex-direction:column;align-items:flex-start;gap:18px}
.mobile-menu .btn{width:100%}
@keyframes slideDown{from{opacity:0;transform:translateY(-10px)}to{opacity:1;transform:none}}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion:reduce){
  *,*::before,*::after{animation-duration:.001ms!important;animation-iteration-count:1!important;transition-duration:.001ms!important;scroll-behavior:auto!important}
  .reveal{opacity:1;transform:none}
}