/* резервируем место под вертикальный скроллбар, чтобы верстка не скакала */
html{ scrollbar-gutter: stable; }

/* ===========================
   ПрофТест 2.0 — Base Styles (final stable version)
   =========================== */

/* ---- CSS Variables ---- */
:root{
  --bg: #0a0d18;
  --surface: #12172a;
  --surface-2: #1a2140;
  --text: #f2f5ff;
  --text-muted: #c6ccee;
  --primary: #6d7cff;
  --primary-2: #8c98ff;
  --accent: #32c6ff;
  --ok: #18c49e;
  --warn: #ffb545;
  --danger: #ff6b6b;

  --ring: rgba(109,124,255,.6);
  --shadow-1: 0 8px 24px rgba(6,10,24,.35);
  --shadow-2: 0 14px 40px rgba(6,10,24,.5);
  --radius-lg: 18px;
  --radius-md: 14px;
  --radius-sm: 10px;

  --container: 1120px;
  --sp-1: .5rem;  --sp-2: .75rem; --sp-3: 1rem;
  --sp-4: 1.5rem; --sp-5: 2rem;   --sp-6: 3rem; --sp-7: 4rem;

  --font: "Inter", system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", sans-serif;

  --border: rgba(140,150,255,.28);
  --border-subtle: rgba(140,150,255,.18);

  /* Высота шапки */
  --header-h: 64px;
}

/* Светлая тема */
@media (prefers-color-scheme: light){
  :root{
    --bg:#f6f8ff;
    --surface:#ffffff;
    --surface-2:#eef1ff;
    --text:#121636;
    --text-muted:#4b5385;
    --primary:#4456ff;
    --primary-2:#6372ff;
    --accent:#0a9dd1;
    --ring: rgba(68,86,255,.45);
    --shadow-1: 0 10px 24px rgba(26,36,92,.08);
    --shadow-2: 0 18px 40px rgba(26,36,92,.14);
    --border: rgba(68,86,255,.25);
    --border-subtle: rgba(68,86,255,.15);
  }
}

/* ---- Reset/Globals ---- */
*{ box-sizing:border-box }
html,body{ height:100% }
body{
  margin:0; font-family:var(--font); color:var(--text);
  background:
    radial-gradient(1200px 800px at 80% -10%, rgba(50,198,255,.10), transparent 55%),
    var(--bg);
  -webkit-font-smoothing:antialiased; -moz-osx-font-smoothing:grayscale;
  padding-top: var(--header-h); /* компенсация фиксированной шапки */
}
img{ max-width:100%; height:auto; display:block }
a{ color:inherit; text-decoration:none }
a:focus-visible, button:focus-visible, .btn:focus-visible{
  outline:none;
  box-shadow: 0 0 0 3px var(--ring);
  border-radius: 12px;
}
.container{
  width:100%; max-width:var(--container);
  margin-inline:auto;
  padding-inline: clamp(var(--sp-3), 2vw, var(--sp-5));
}

/* ---- Header / Nav ---- */
.header{
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background: var(--surface);
  box-shadow: 0 2px 12px rgba(0,0,0,.25);
  z-index: 1000;
}
.header-inner{
  display:flex; align-items:center; justify-content:space-between;
  padding-block: var(--sp-3);
  min-height: var(--header-h);
}
.logo h1{
  margin:0; font-weight:800; letter-spacing:.2px; font-size: clamp(20px, 2vw, 22px);
  background: linear-gradient(90deg, var(--primary-2), var(--accent));
  -webkit-background-clip:text; background-clip:text; color:transparent;
}
.nav a{
  display:inline-block; padding: .6rem .9rem; margin-left:.25rem;
  color:var(--text-muted); border-radius:10px; transition: all .2s ease;
  border:1px solid transparent;
}
.nav a:hover{
  color:var(--text);
  background: rgba(109,124,255,.16);
  border-color: var(--border-subtle);
}

/* ---- Hero ---- */
.hero{
  padding: clamp(var(--sp-6), 7vw, var(--sp-7)) 0 var(--sp-6);
}
.hero-inner{
  display:grid; grid-template-columns: 1.1fr .9fr; gap: clamp(var(--sp-5), 5vw, var(--sp-7));
  align-items:center;
}
.hero-text h2{
  margin:0 0 var(--sp-3); font-weight:900;
  font-size: clamp(26px, 6vw, 44px);
  line-height:1.05;
  letter-spacing:.2px;
  background-image: linear-gradient(90deg,#2f8dd9, #8198ff 40%, #a9b3ff 60%, #2f8dd9);
  background-size: 200% 100%;
  animation: shine 5.5s linear infinite;
  -webkit-background-clip:text; background-clip:text; color: transparent;
  filter: drop-shadow(0 8px 24px rgba(109,124,255,.18));
}
.hero-text p{
  margin: 0 0 var(--sp-4);
  color: var(--text-muted);
  font-size: clamp(16px, 1.5vw, 18px);
  line-height: 1.65;
}
.hero-image{
  border-radius: 18px;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  padding: var(--sp-4);
  box-shadow: var(--shadow-1);
  border:1px solid var(--border);
}

/* ---- Buttons ---- */
.btn{
  display:inline-flex; align-items:center; justify-content:center; gap:.5rem;
  padding: .9rem 1.15rem; border-radius: 14px; font-weight: 700; letter-spacing:.2px;
  border: 1px solid transparent; transition: transform .04s ease, box-shadow .2s ease, background .2s ease;
}
.btn:active{ transform: translateY(1px) }
.btn-primary{
  color:#0b0f1e;
  background: linear-gradient(180deg, var(--primary-2), var(--primary));
  box-shadow: 0 10px 24px rgba(109,124,255,.42);
  border-color: rgba(109,124,255,.5);
}
.btn-primary:hover{ box-shadow: 0 16px 38px rgba(109,124,255,.55); }
.btn-secondary{
  color: var(--text);
  background: linear-gradient(180deg, rgba(109,124,255,.18), rgba(50,198,255,.18));
  border-color: var(--border);
}
.btn-secondary:hover{
  background: linear-gradient(180deg, rgba(109,124,255,.24), rgba(50,198,255,.24))
}

/* ---- Sections ---- */
.section{ padding: clamp(var(--sp-6), 7vw, var(--sp-7)) 0 }
.section-title{
  margin:0 0 var(--sp-4);
  font-size: clamp(28px, 3.2vw, 38px);
  letter-spacing:.2px; font-weight:900;
}

/* ---- Grids ---- */
.about-grid, .features-grid, .pricing-grid{
  display:grid; gap: clamp(var(--sp-4), 3vw, var(--sp-5));
}
.about-grid{ grid-template-columns: repeat(3, 1fr) }
.features-grid{ grid-template-columns: repeat(3, 1fr) }
.pricing-grid{ grid-template-columns: repeat(2, 1fr) }

/* ---- Hamburger ---- */
.hamburger{
  display:none;
  position: relative;
  width: 40px; height: 40px;
  background: transparent;
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--text);
  align-items: center; justify-content: center;
  cursor: pointer;
}
.hamburger::before,
.hamburger::after,
.hamburger .burger-bars{
  position: absolute;
  left: 8px; right: 8px;
  height: 2px;
  background: currentColor;
  border-radius: 2px;
  content: "";
  transition: transform .25s ease, opacity .2s ease;
}
.hamburger::before{ top: 12px; }
.hamburger .burger-bars{ top: 19px; }
.hamburger::after{ top: 26px; }

/* ---- Mobile nav panel ---- */
.mobile-nav-panel{
  position: fixed;
  top: var(--header-h);
  left: 0; right: 0;
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border-bottom: 1px solid var(--border);
  box-shadow: var(--shadow-2);
  transform-origin: top center;
  transform: translateY(-8px) scaleY(0.98);
  opacity: 0;
  pointer-events: none;
  transition: transform .25s ease, opacity .25s ease;
  z-index: 1100;
}
.mobile-nav-inner{
  display:flex; flex-direction:column;
  gap:.5rem;
  padding:.75rem clamp(var(--sp-3), 4vw, var(--sp-4));
}
.mobile-nav-inner a{
  display:block;
  padding:.85rem 1rem;
  border-radius:10px;
  color:var(--text);
  font-weight:700;
  border:1px solid transparent;
  transition: background .2s ease;
}
.mobile-nav-inner a:hover{
  background: rgba(109,124,255,.08);
  border-color: var(--border-subtle);
}

/* ---- Overlay ---- */
.mobile-overlay{
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(4px);
  z-index: 900;
  opacity: 0;
  pointer-events: none;
  transition: opacity .25s ease;
}
.mobile-nav-open .mobile-overlay{
  opacity: 1;
  pointer-events: auto;
}

/* ---- Open state ---- */
.mobile-nav-open .mobile-nav-panel{
  transform: translateY(0) scaleY(1);
  opacity: 1;
  pointer-events: auto;
}
.mobile-nav-open body{ overflow:hidden; }

/* Крестик */
.mobile-nav-open .hamburger .burger-bars{
  opacity: 0;
  transform: scaleX(.85);
}
.mobile-nav-open .hamburger::before{
  transform-origin: center;
  transform: translateY(7px) rotate(45deg);
}
.mobile-nav-open .hamburger::after{
  transform-origin: center;
  transform: translateY(-7px) rotate(-45deg);
}

/* ---- Responsive ---- */
@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; }
  .about-grid, .features-grid{ grid-template-columns: 1fr 1fr; }
  .nav{ display:none !important; }
  .hamburger{ display:inline-flex; }
  .header-inner{ gap:.75rem; padding-inline: clamp(1rem, 4vw, 1.5rem); }

  .hero-text { text-align:center; }
  .hero-text .btn {
    display:inline-block;
    margin-inline:auto;
  }
}
@media (max-width: 640px){
  .about-grid, .features-grid, .pricing-grid{ grid-template-columns:1fr; }
  .mobile-nav-inner{ padding-inline: clamp(1rem, 5vw, 1.75rem); }
}
@media (max-width: 480px){
  .mobile-nav-inner{ padding:.5rem; gap:.35rem; }
  .mobile-nav-inner a{ padding:.75rem .85rem; font-size:.98rem; }
}

/* ---- Cards / FAQ / Reviews / Footer ---- */
.card, .faq-item, .review, .hero-image{
  background: linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid var(--border);
}
.card, .faq-item, .review{
  border-radius:18px;
  padding:clamp(var(--sp-4),3vw,var(--sp-5));
  box-shadow:var(--shadow-1);
}
.card.highlight{
  background: linear-gradient(180deg, rgba(109,124,255,.18), rgba(50,198,255,.14)),
              linear-gradient(180deg, var(--surface), var(--surface-2));
  border: 1px solid rgba(109,124,255,.38);
  box-shadow: var(--shadow-2);
  transition: transform .2s ease, box-shadow .2s ease;
}
.card.highlight:hover{
  transform: translateY(-4px);
  box-shadow: 0 22px 60px rgba(109,124,255,.42);
}
.price{ font-size:clamp(26px,3vw,32px); font-weight:900; margin:0 0 var(--sp-3); }
.card ul{ list-style:none; padding:0; margin:0 0 var(--sp-4); }
.card ul li{
  margin:.55rem 0; padding-left:1.3rem; position:relative; color:var(--text-muted);
}
.card ul li:before{
  content:"•"; position:absolute; left:0; top:0; color:var(--accent);
}

/* ---- Footer ---- */
.footer{
  padding:var(--sp-5) 0;
  border-top:1px solid var(--border);
  background:linear-gradient(180deg, rgba(109,124,255,.08), transparent);
}
.footer .container{
  display:flex; flex-direction:column; gap:.5rem; align-items:center; text-align:center;
}
.footer a{ color:var(--primary-2); }
.footer a:hover{ text-decoration:underline; }

/* ---- Animations ---- */
@keyframes shine {
  0% { background-position: 0% 50%; }
  100% { background-position: 100% 50%; }
}

/* ---- Расстояние между отзывами и вопросами ---- */
.reviews-slider {
  display: flex;
  flex-direction: column;
  gap: clamp(1.5rem, 4vw, 2.5rem); /* было плотнее, теперь 24–40px */
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

.faq-items {
  display: flex;
  flex-direction: column;
  gap: clamp(1.25rem, 3vw, 2rem);  /* немного меньше, чтобы блок выглядел компактнее */
  margin-top: clamp(1.5rem, 3vw, 2rem);
}

/* Отдельно увеличим внутренние отступы карточек */
.review, .faq-item {
  padding: clamp(1.25rem, 3vw, 1.75rem);
}