/* ==============================================
   Revolut Design — stonehero.ru
   Philosophy: typography-first, pure black/white
   alternation, zero decoration. The cobalt violet
   appears on ONE element: the featured plan card.
   ============================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&display=swap');

:root {
  --black: #000;
  --white: #fff;
  --primary: #494fdf;
  --surface-elevated: #16181a;
  --surface-soft: #f4f4f4;
  --ink: #191c1f;
  --mute: #505a63;
  --ash: #8d969e;
  --on-dark-mute: rgba(255,255,255,0.72);
  --hairline: #e2e2e7;
  --hairline-dark: rgba(255,255,255,0.12);
  --divider: rgba(255,255,255,0.06);
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --r-lg: 20px;
  --r-full: 9999px;
  --container: 1200px;
}

*,*::before,*::after{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--white);color:var(--ink);line-height:1.5;font-size:16px;letter-spacing:0.01em}

.container{width:100%;max-width:var(--container);margin:0 auto;padding:0 24px}

/* ---- NAV ---- */
.nav{position:sticky;top:0;z-index:100;height:64px;background:rgba(0,0,0,0.92);backdrop-filter:blur(12px);-webkit-backdrop-filter:blur(12px);display:flex;align-items:center}
.nav__inner{display:flex;align-items:center;height:100%;gap:40px}
.nav__logo{display:flex;align-items:center;text-decoration:none;color:var(--white);font-size:20px;font-weight:700;letter-spacing:-0.02em;flex-shrink:0}
.nav__logo span{color:var(--primary)}
.nav__links{display:flex;gap:4px;flex:1;justify-content:center}
.nav__links a{text-decoration:none;color:var(--on-dark-mute);font-size:14px;font-weight:500;padding:6px 14px;border-radius:var(--r-full);transition:.2s}
.nav__links a:hover{color:var(--white);background:rgba(255,255,255,0.06)}
.nav__phone{flex-shrink:0}
.nav__phone a{color:var(--white);text-decoration:none;font-size:15px;font-weight:600;white-space:nowrap}
.nav__phone span{display:block;font-size:11px;color:var(--on-dark-mute);text-align:right}

/* ---- BUTTONS ---- */
.btn{display:inline-flex;align-items:center;gap:8px;text-decoration:none;font-weight:600;font-size:16px;letter-spacing:0.01em;border-radius:var(--r-full);transition:.2s;cursor:pointer;border:none;font-family:var(--font)}

.btn--primary{padding:14px 32px;height:48px;background:var(--white);color:var(--black)}
.btn--primary:hover{background:#d4d4d8}

.btn--primary-dark{padding:14px 32px;height:48px;background:var(--black);color:var(--white)}
.btn--primary-dark:hover{background:#1a1a1a}

.btn--outline{padding:13px 31px;height:48px;background:transparent;color:var(--white);border:1px solid rgba(255,255,255,0.25)}
.btn--outline:hover{background:rgba(255,255,255,0.06)}

.btn--outline-dark{padding:13px 31px;height:48px;background:transparent;color:var(--black);border:1px solid var(--hairline)}
.btn--outline-dark:hover{background:var(--surface-soft)}

.btn--whatsapp{padding:14px 32px;height:48px;background:#25D366;color:var(--white)}
.btn--whatsapp:hover{filter:brightness(1.08)}

.btn--lg{padding:18px 40px;height:56px;font-size:18px}

/* ---- HERO ---- */
.hero{background:var(--black);color:var(--white);padding:140px 0 100px;position:relative;overflow:hidden}
.hero__bg{position:absolute;inset:0;background:url('https://images.unsplash.com/photo-1499955085172-a104c9463ece?w=1920&q=85') center/cover no-repeat;opacity:0.28}
.hero__inner{position:relative;z-index:2;max-width:780px}
.hero__title{font-size:clamp(36px,7vw,88px);font-weight:500;line-height:0.95;letter-spacing:-0.04em;margin-bottom:24px}
.hero__sub{font-size:clamp(16px,2vw,20px);font-weight:400;color:var(--on-dark-mute);line-height:1.5;max-width:560px;margin-bottom:44px}
.hero__btns{display:flex;gap:12px;flex-wrap:wrap;margin-bottom:64px}
.hero__stats{display:flex;gap:56px;flex-wrap:wrap}
.hero__stat-num{font-size:28px;font-weight:500;display:block;margin-bottom:4px;letter-spacing:-0.02em}
.hero__stat-label{font-size:13px;color:var(--on-dark-mute);text-transform:uppercase;letter-spacing:0.04em}

/* ---- SECTIONS ---- */
.sec{padding:100px 0}
.sec--dark{background:var(--black);color:var(--white)}
.sec--soft{background:var(--surface-soft)}

.sec__label{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:0.06em;color:var(--primary);margin-bottom:16px;display:block}
.sec--dark .sec__label{color:var(--on-dark-mute)}
.sec__title{font-size:clamp(28px,5vw,52px);font-weight:500;line-height:1.08;letter-spacing:-0.03em;margin-bottom:12px}
.sec__sub{font-size:17px;color:var(--mute);max-width:560px;line-height:1.55}
.sec--dark .sec__sub{color:var(--on-dark-mute)}

.sec__head{text-align:center;margin-bottom:64px}
.sec__head .sec__sub{margin:0 auto}
.sec__head--left{text-align:left;margin-bottom:48px}

/* ---- GRID ---- */
.grid{display:grid;gap:24px}
.grid--2{grid-template-columns:1fr 1fr}
.grid--3{grid-template-columns:repeat(3,1fr)}
.grid--4{grid-template-columns:repeat(4,1fr)}

/* ---- CARD (generic) ---- */
.card{border-radius:var(--r-lg);padding:32px;transition:.2s}
.card--light{background:var(--white);border:1px solid var(--hairline)}
.card--light:hover{border-color:#ccc}
.card--dark{background:var(--surface-elevated)}
.card--dark:hover{background:#1f2226}
.card h3{font-size:20px;font-weight:500;margin-bottom:8px;letter-spacing:-0.01em}
.card p{font-size:14px;color:var(--mute);line-height:1.55}
.card--dark p{color:var(--on-dark-mute)}
.card--dark h3{color:var(--white)}

/* ---- SERVICE CARD ---- */
.card--svc{display:flex;flex-direction:column}
.card--svc .card__price{margin-top:auto;padding-top:20px;font-size:22px;font-weight:500;letter-spacing:-0.02em}
.card--dark .card__price{color:var(--white)}

/* ---- CLICKABLE CARD ---- */
.card--link{text-decoration:none;color:inherit;cursor:pointer;display:block}
.card--link.card--svc{display:flex;flex-direction:column}

/* ---- ADVANTAGE CARD (centered, dark) ---- */
.card--adv{text-align:center;background:var(--surface-elevated);padding:40px 32px}
.card--adv h3{font-size:18px}
.card--adv p{font-size:13px}

/* ---- PLAN CARD ---- */
.card--plan{padding:36px 32px}
.card--plan .plan__name{font-size:28px;font-weight:500;margin-bottom:6px;letter-spacing:-0.02em}
.card--plan .plan__desc{font-size:14px;color:var(--on-dark-mute);margin-bottom:28px}
.card--plan .plan__features{list-style:none;margin-bottom:28px}
.card--plan .plan__features li{font-size:14px;color:var(--on-dark-mute);padding:5px 0;display:flex;align-items:center;gap:8px;line-height:1.4}
.card--plan .plan__features li::before{content:'';width:4px;height:4px;background:var(--primary);border-radius:50%;flex-shrink:0;margin-top:2px}
.card--plan--featured{background:var(--primary)}
.card--plan--featured h3{color:var(--white)}
.card--plan--featured .plan__desc{color:rgba(255,255,255,0.8)}
.card--plan--featured .plan__features li{color:rgba(255,255,255,0.9)}
.card--plan--featured .plan__features li::before{background:var(--white)}

/* ---- MEDIA OVERLAY ---- */
.media{background:var(--black);position:relative;overflow:hidden;padding:120px 0;min-height:440px;display:flex;align-items:center}
.media__bg{position:absolute;inset:0;background:url('https://images.unsplash.com/photo-1507003211169-0a1dd7228f2d?w=1920&q=85') center/cover no-repeat;opacity:0.25}
.media__overlay{position:absolute;inset:0;background:linear-gradient(90deg,rgba(0,0,0,.9) 0%,rgba(0,0,0,.5) 55%,transparent)}
.media__content{position:relative;z-index:2;max-width:520px}
.media__title{font-size:clamp(28px,5vw,44px);font-weight:500;color:var(--white);line-height:1.1;letter-spacing:-0.03em;margin-bottom:20px}
.media__text{font-size:17px;color:var(--on-dark-mute);line-height:1.55;margin-bottom:32px}

/* ---- PRICE TABLE ---- */
.prices{max-width:680px;margin:0 auto}
.prices__row{display:flex;justify-content:space-between;align-items:center;padding:18px 0;border-bottom:1px solid var(--hairline)}
.prices__row:last-child{border-bottom:none}
.prices__name{font-size:16px}
.prices__cost{font-size:18px;font-weight:500;white-space:nowrap;margin-left:32px;letter-spacing:-0.02em}

/* ---- CTA ---- */
.cta{background:var(--black);color:var(--white);padding:100px 0;text-align:center}
.cta__title{font-size:clamp(28px,5vw,48px);font-weight:500;line-height:1.1;letter-spacing:-0.03em;margin-bottom:16px}
.cta__sub{font-size:17px;color:var(--on-dark-mute);max-width:460px;margin:0 auto 36px;line-height:1.5}
.cta__btns{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

/* ---- FOOTER ---- */
.footer{background:var(--black);padding:80px 0 24px}
.footer__grid{display:grid;grid-template-columns:1.5fr 1fr 1fr 1fr;gap:44px;margin-bottom:56px}
.footer__desc{font-size:14px;color:var(--on-dark-mute);line-height:1.6;margin-top:16px}
.footer__hd{font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:0.06em;color:rgba(255,255,255,0.35);margin-bottom:20px}
.footer__list{list-style:none;display:flex;flex-direction:column;gap:10px}
.footer__list a{color:var(--on-dark-mute);text-decoration:none;font-size:14px;transition:.2s}
.footer__list a:hover{color:var(--white)}
.footer__contacts p{font-size:14px;color:var(--on-dark-mute);margin-bottom:8px}
.footer__contacts a{color:var(--primary);text-decoration:none}
.footer__bottom{display:flex;justify-content:space-between;align-items:center;padding-top:24px;border-top:1px solid var(--divider);font-size:12px;color:rgba(255,255,255,0.3)}
.footer__bottom a{color:rgba(255,255,255,0.3);text-decoration:none;transition:.2s}
.footer__bottom a:hover{color:rgba(255,255,255,0.5)}

/* ---- FAQ ---- */
.faq-q{padding:28px 0;border-bottom:1px solid var(--hairline)}
.faq-q:last-child{border-bottom:none}
.faq-q h2{font-size:20px;font-weight:500;margin-bottom:12px;letter-spacing:-0.01em}
.faq-q p,.faq-q li{font-size:15px;color:var(--mute);line-height:1.65}
.faq-q ul{margin:12px 0;padding-left:20px}
.faq-q li{margin-bottom:4px}

/* ---- RESPONSIVE ---- */
.burger{display:none;flex-direction:column;gap:4px;background:none;border:none;cursor:pointer;padding:8px 4px}
.burger span{display:block;width:22px;height:2px;background:var(--white);border-radius:2px;transition:.2s}

@media(max-width:1024px){
  .grid--3,.grid--4{grid-template-columns:repeat(2,1fr)}
  .footer__grid{grid-template-columns:1fr 1fr}
  .nav__links{display:none}
  .burger{display:flex}
}
@media(max-width:768px){
  .grid--2,.grid--3,.grid--4{grid-template-columns:1fr}
  .footer__grid{grid-template-columns:1fr;gap:32px}
  .hero__title{font-size:34px}
  .hero__sub{font-size:15px}
  .hero__stats{gap:28px}
  .hero__stat-num{font-size:22px}
  .sec{padding:64px 0}
  .hero{padding:80px 0 64px}
  .prices__row{flex-direction:column;align-items:flex-start;gap:4px}
  .prices__cost{margin-left:0}
  .footer__bottom{flex-direction:column;gap:8px;text-align:center}
  .media{min-height:360px;padding:80px 0}
  .card--adv{padding:28px 24px}
}
@media(max-width:480px){
  .hero__btns{flex-direction:column;align-items:stretch}
  .hero__title{font-size:30px}
  .hero{padding:60px 0 48px}
  .container{padding:0 16px}
  .btn--lg{justify-content:center}
  .sec__title{font-size:26px}
}