/* =============================================================
   КАИР — бухгалтерские услуги в Серпухове
   Стиль вдохновлён шаблоном Globaly (TemplateMonster #80473)
   ============================================================= */

:root{
  --accent: #7d7d31;
  --accent-dark: #646427;
  --navy: #31353d;
  --navy-light: #4a4e55;
  --ink: #3b3d42;
  --text: #6b6e75;
  --line: #ececec;
  --bg-alt: #f6f8f9;
  --white: #ffffff;

  --f-heading: 'Merriweather', serif;
  --f-body: 'Merriweather Sans', sans-serif;
  --f-nav: 'Roboto', sans-serif;
  --f-btn: 'Lato', sans-serif;

  --container: 1180px;
}

*, *::before, *::after{ box-sizing: border-box; }
html{ scroll-behavior: smooth; }
body{
  margin:0;
  font-family: var(--f-body);
  color: var(--text);
  background: var(--white);
  font-size: 16px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}
img{ max-width:100%; display:block; }
a{ color: var(--accent); text-decoration:none; }
ul{ margin:0; padding:0; list-style:none; }
h1,h2,h3{ font-family: var(--f-heading); color: var(--navy); margin:0 0 16px; font-weight:700; line-height:1.3; }
h2{ font-size: 2.4rem; }
h3{ font-size: 1.15rem; }
p{ margin:0 0 16px; }

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

/* ---------- buttons ---------- */
.btn{
  display:inline-block;
  font-family: var(--f-btn);
  font-weight: 900;
  font-size: .85rem;
  letter-spacing: .05em;
  text-transform: uppercase;
  padding: 15px 34px;
  border-radius: 999px;
  border: 2px solid transparent;
  transition: all .25s ease;
  cursor:pointer;
}
.btn--accent{ background: var(--accent); color:#fff; }
.btn--accent:hover{ background: var(--accent-dark); }
.btn--outline-light{ border-color: rgba(255,255,255,.7); color:#fff; }
.btn--outline-light:hover{ background: rgba(255,255,255,.12); }

/* ---------- eyebrow / section head ---------- */
.eyebrow{
  font-family: var(--f-nav);
  text-transform: uppercase;
  letter-spacing: .12em;
  font-size: .78rem;
  color: var(--accent);
  font-weight:600;
  margin: 0 0 10px;
}
.eyebrow--light{ color: rgba(255,255,255,.85); }
.section-head{ text-align:center; max-width: 640px; margin: 0 auto 56px; }
.section-head h2::after,
.about__content h2::after{ content:""; }

section{ padding: 96px 0; }
.details, .prices, .ndfl, .news{ }
h2 + p{ }
.section-head h2{ position:relative; padding-bottom: 18px; }
.section-head h2::before{
  content:"";
  position:absolute; left:50%; bottom:0; transform:translateX(-50%);
  width:46px; height:3px; background: var(--accent);
}

/* ---------- check list ---------- */
.check-list li{
  position:relative; padding-left: 30px; margin-bottom: 12px; color: var(--text);
}
.check-list li::before{
  content:"✓"; position:absolute; left:0; top:0;
  width:20px; height:20px; border-radius:50%;
  background: var(--accent); color:#fff; font-size:.7rem;
  display:flex; align-items:center; justify-content:center; line-height:1;
}
.check-list--light li{ color: rgba(255,255,255,.85); }

/* =============================================================
   TOP BAR + HEADER
   ============================================================= */
.topbar{ background: var(--navy); color: rgba(255,255,255,.75); font-family: var(--f-nav); font-size:.82rem; }
.topbar__inner{ display:flex; justify-content:space-between; align-items:center; padding: 9px 24px; flex-wrap:wrap; gap:6px; }
.topbar a{ color: rgba(255,255,255,.85); }
.topbar a:hover{ color: var(--accent); }
.topbar .divider{ margin: 0 8px; opacity:.4; }

.site-header{
  position: sticky; top:0; z-index: 100;
  background:#fff;
  border-bottom: 1px solid var(--line);
  transition: box-shadow .25s ease;
}
.site-header.is-scrolled{ box-shadow: 0 6px 24px rgba(20,25,35,.08); }
.header__inner{ display:flex; align-items:center; gap: 28px; padding: 16px 24px; }

.logo{ display:flex; align-items:center; gap:10px; margin-right:auto; }
.logo__mark img{ display:block; width:80px; height:80px; object-fit:contain; border-radius:8px; }
.logo--footer .logo__mark img{ width:80px; height:80px; }
.logo__text{
  font-family: var(--f-heading); font-weight:900; font-size:1.5rem; color: var(--accent);
  display:flex; flex-direction:column; line-height:1.1;
}
.logo__text .dot{ color: var(--accent); }
.logo__text small{ font-family: var(--f-nav); font-weight:400; font-size:.62rem; letter-spacing:.08em; text-transform:uppercase; color: var(--text); }

.nav ul{ display:flex; gap: 30px; }
.nav a{
  font-family: var(--f-nav); font-weight:500; font-size:.92rem; color: var(--ink);
  padding: 8px 0; position:relative;
}
.nav a::after{
  content:""; position:absolute; left:0; right:0; bottom:0; height:2px; background: var(--accent);
  transform: scaleX(0); transition: transform .2s ease; transform-origin:left;
}
.nav a:hover, .nav a.active{ color: var(--accent); }
.nav a:hover::after, .nav a.active::after{ transform: scaleX(1); }

.header__cta{ padding: 12px 24px; font-size:.75rem; }
.burger{
  display:none; width:40px; height:34px; border:none; background:none; cursor:pointer;
  flex-direction:column; justify-content:space-between; padding:4px;
}
.burger span{ display:block; height:2px; background: var(--navy); border-radius:2px; }

/* =============================================================
   HERO
   ============================================================= */
.hero{ position:relative; color:#fff; overflow:hidden; }
.hero__media{ position:absolute; inset:0; }
.hero__media img{ width:100%; height:100%; object-fit:cover; }
.hero__media::after{
  content:""; position:absolute; inset:0;
  background: linear-gradient(120deg, rgba(20,26,36,.92) 10%, rgba(21,40,45,.72) 55%, rgba(21,193,198,.35) 100%);
}
.hero__inner{ position:relative; padding: 150px 24px 130px; max-width: 720px; }
.hero h1{ color:#fff; font-size: 3rem; margin-bottom:22px; }
.hero__lead{ font-size:1.1rem; color: rgba(255,255,255,.88); max-width:560px; }
.hero__actions{ display:flex; gap:16px; margin-top:34px; flex-wrap:wrap; }

/* =============================================================
   ABOUT
   ============================================================= */
.about{ background: var(--white); }
.about__grid{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 64px; align-items:center; }
.about__image img{ border-radius: 10px; box-shadow: 0 24px 60px -20px rgba(20,25,35,.35); }

/* ---------- image carousel (About section) ---------- */
.about__carousel{
  position: relative;
  border-radius: 10px;
  overflow: hidden;
  box-shadow: 0 24px 60px -20px rgba(20,25,35,.35);
  aspect-ratio: 756 / 539;
}
.carousel__track{
  display: flex;
  width: 100%;
  height: 100%;
  transition: transform .55s cubic-bezier(.65,0,.35,1);
}
.carousel__slide{
  flex: 0 0 100%;
  width: 100%;
  height: 100%;
}
.carousel__slide img{
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  border-radius: 0;
  box-shadow: none;
}

.carousel__arrow{
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: rgba(255,255,255,.85);
  color: var(--navy);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background .2s ease, color .2s ease, transform .2s ease;
  z-index: 2;
}
.carousel__arrow:hover{ background: var(--accent); color: #fff; }
.carousel__arrow--prev{ left: 14px; }
.carousel__arrow--next{ right: 14px; }

.carousel__dots{
  position: absolute;
  left: 0; right: 0; bottom: 16px;
  display: flex;
  justify-content: center;
  gap: 9px;
  z-index: 2;
}
.carousel__dot{
  width: 9px; height: 9px;
  border-radius: 50%;
  border: 2px solid rgba(255,255,255,.85);
  background: rgba(255,255,255,.15);
  padding: 0;
  cursor: pointer;
  transition: background .2s ease, transform .2s ease;
}
.carousel__dot:hover{ transform: scale(1.15); }
.carousel__dot.is-active{ background: var(--accent); border-color: var(--accent); }

/* =============================================================
   SERVICES
   ============================================================= */
.services{ background: var(--bg-alt); }
.cards{ display:grid; gap: 32px; }
.cards--4{ grid-template-columns: repeat(4, 1fr); }
.cards--3{ grid-template-columns: repeat(3, 1fr); }

.card{
  background:#fff; padding: 40px 28px; border-radius: 10px; text-align:center;
  box-shadow: 0 10px 30px -18px rgba(20,25,35,.18);
  transition: transform .25s ease, box-shadow .25s ease;
}
.card:hover{ transform: translateY(-6px); box-shadow: 0 20px 40px -18px rgba(20,25,35,.28); }
.card__icon{
  width:64px; height:64px; margin:0 auto 20px; border-radius:50%;
  background: var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center;
}
.card h3{ margin-bottom:10px; }
.card p{ font-size:.92rem; margin-bottom:14px; }
.card__link{ font-family: var(--f-nav); font-weight:600; font-size:.85rem; }

.tag-list{ display:flex; flex-wrap:wrap; gap:12px; justify-content:center; margin-top:48px; }
.tag-list li{
  font-family: var(--f-nav); font-size:.85rem; color: var(--navy);
  background:#fff; border:1px solid var(--line); padding:10px 20px; border-radius:999px;
}

/* =============================================================
   PROMO (dark band)
   ============================================================= */
.promo{ position:relative; color:#fff; overflow:hidden; }
.promo__media{ position:absolute; inset:0; }
.promo__media img{ width:100%; height:100%; object-fit:cover; }
.promo__media::after{ content:""; position:absolute; inset:0; background: linear-gradient(115deg, rgba(19,23,31,.95) 20%, rgba(21,40,45,.85) 60%, rgba(21,193,198,.45) 100%); }
.promo__inner{ position:relative; max-width: 680px; padding: 100px 24px; }
.promo h2{ color:#fff; }
.promo__lead{ color: rgba(255,255,255,.85); }
.promo .check-list{ margin-bottom: 34px; }

/* =============================================================
   DETAILS
   ============================================================= */
.details{ background:#fff; }
.details--alt{ background: var(--bg-alt); }
.details__grid{ display:grid; grid-template-columns: 1fr 1fr; gap: 64px; }
.details h2{ font-size:1.6rem; }

/* =============================================================
   ACCORDION (3-NDFL)
   ============================================================= */
.ndfl{ background:#fff; }
.accordion{ max-width: 800px; margin:0 auto; border-top:1px solid var(--line); }
.accordion__item{ border-bottom:1px solid var(--line); }
.accordion__head{
  width:100%; display:flex; justify-content:space-between; align-items:center; gap:16px;
  background:none; border:none; text-align:left; cursor:pointer;
  padding: 22px 4px; font-family: var(--f-heading); font-weight:700; color: var(--navy); font-size:1.05rem;
}
.accordion__price{ font-family: var(--f-nav); font-weight:700; color: var(--accent); white-space:nowrap; font-size:.95rem; }
.accordion__body{ max-height:0; overflow:hidden; transition: max-height .3s ease; }
.accordion__body p{ padding: 0 4px 22px; font-size:.92rem; color:var(--text); margin:0; }
.accordion__item.is-open .accordion__body{ max-height: 400px; }
.accordion__head::before{
  content:"+"; order:-1; font-size:1.3rem; color:var(--accent); width:20px; flex-shrink:0;
}
.accordion__item.is-open .accordion__head::before{ content:"–"; }
.accordion__head span:first-of-type{ order:0; flex:1; }

/* =============================================================
   PRICES
   ============================================================= */
.prices{ background: var(--bg-alt); }
.price-grid{ display:grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.price-card{
  background:#fff; border-radius:10px; padding: 32px 26px;
  box-shadow: 0 10px 30px -18px rgba(20,25,35,.18);
}
.price-card--accent{ background: var(--navy); }
.price-card h3{ font-size:1.05rem; margin-bottom: 18px; padding-bottom:14px; border-bottom:2px solid var(--accent); }
.price-card ul li{
  display:flex; justify-content:space-between; gap:10px; padding: 10px 0;
  border-bottom:1px dashed var(--line); font-size:.85rem;
}
.price-card ul li:last-child{ border-bottom:none; }
.price-card ul li span{ color: var(--text); }
.price-card ul li b{ color: var(--navy); white-space:nowrap; font-weight:700; }

/* accent card overrides — must come after the base rules above to win the cascade */
.price-card--accent h3, .price-card--accent ul li span{ color:#fff; }
.price-card--accent ul li b{ color: var(--accent); }
.price-card--accent ul li{ border-bottom-color: rgba(255,255,255,.12); }
.prices__note{ text-align:center; max-width:640px; margin: 40px auto 0; font-size:.88rem; color:var(--text); }

/* =============================================================
   NEWS
   ============================================================= */
.news{ background:#fff; }
.news-card{
  background: var(--bg-alt); border-radius:10px; padding: 34px 28px;
  transition: box-shadow .25s ease, transform .25s ease;
}
.news-card:hover{ transform: translateY(-4px); box-shadow: 0 16px 34px -20px rgba(20,25,35,.25); }
.news-card__icon{
  width:48px; height:48px; border-radius:50%; background: var(--accent); color:#fff;
  display:flex; align-items:center; justify-content:center; margin-bottom:18px;
}
.news-card h3{ font-size:1.05rem; margin-bottom:10px; }
.news-card p{ font-size:.88rem; margin:0; }

/* =============================================================
   CTA
   ============================================================= */
.cta{ background: var(--accent); color:#fff; }
.cta__inner{ display:flex; justify-content:space-between; align-items:center; gap:24px; flex-wrap:wrap; }
.cta h2{ color:#fff; margin:0; font-size:1.9rem; }
.cta .eyebrow--light{ color: rgba(255,255,255,.8); }
.cta__actions{ display:flex; gap:16px; flex-wrap:wrap; }
.cta .btn--accent{ background: var(--navy); }
.cta .btn--accent:hover{ background:#20232a; }

/* =============================================================
   CONTACTS
   ============================================================= */
.contacts{ background:#fff; }
.contacts__grid{ display:grid; grid-template-columns: 0.9fr 1.1fr; gap: 48px; }
.info-list li{ padding: 16px 0; border-bottom:1px solid var(--line); }
.info-list li:first-child{ padding-top:0; }
.info-list__label{ display:block; font-family: var(--f-nav); font-size:.75rem; text-transform:uppercase; letter-spacing:.08em; color: var(--accent); font-weight:700; margin-bottom:6px; }
.requisites{ margin-top:24px; font-size:.78rem; color:#9a9da3; }
.contacts__map{ min-height: 340px; border-radius:10px; overflow:hidden; box-shadow: 0 10px 30px -18px rgba(20,25,35,.2); }
.contacts__map iframe{ width:100%; height:100%; border:0; min-height:340px; }

/* =============================================================
   FOOTER
   ============================================================= */
.footer{ background: var(--navy); color: rgba(255,255,255,.6); padding: 44px 0; }
.footer__inner{ display:flex; align-items:center; justify-content:space-between; gap:24px; flex-wrap:wrap; }
.logo--footer .logo__text{ color: var(--accent); }
.footer__nav{ display:flex; gap:22px; flex-wrap:wrap; }
.footer__nav a{ color: rgba(255,255,255,.65); font-family: var(--f-nav); font-size:.88rem; }
.footer__nav a:hover{ color: var(--accent); }
.footer__copy{ margin:0; font-size:.8rem; }

/* =============================================================
   BACK TO TOP
   ============================================================= */
.to-top{
  position: fixed; right:24px; bottom:24px; width:46px; height:46px; border-radius:50%;
  background: var(--accent); color:#fff; border:none; cursor:pointer;
  display:flex; align-items:center; justify-content:center;
  box-shadow: 0 10px 24px -8px rgba(21,193,198,.6);
  opacity:0; visibility:hidden; transform: translateY(10px);
  transition: all .25s ease; z-index: 90;
}
.to-top.is-visible{ opacity:1; visibility:visible; transform:none; }

/* =============================================================
   RESPONSIVE
   ============================================================= */
@media (max-width: 980px){
  .about__grid, .details__grid, .contacts__grid{ grid-template-columns: 1fr; }
  .cards--4{ grid-template-columns: repeat(2,1fr); }
  .cards--3{ grid-template-columns: 1fr; }
  .price-grid{ grid-template-columns: repeat(2,1fr); }
  .hero h1{ font-size:2.3rem; }
  h2{ font-size:1.9rem; }
}

@media (max-width: 860px){
  .nav{
    position:fixed; top:0; right:0; height:100vh; width:280px; background:#fff;
    box-shadow: -10px 0 40px rgba(0,0,0,.15);
    transform: translateX(100%); transition: transform .3s ease;
    padding: 100px 32px 32px; z-index: 99;
  }
  .nav.is-open{ transform: translateX(0); }
  .nav ul{ flex-direction:column; gap:6px; }
  .nav a{ display:block; padding:12px 0; font-size:1rem; }
  .burger{ display:flex; }
  .header__cta{ display:none; }
  .topbar__inner{ justify-content:center; text-align:center; }
}

@media (max-width: 640px){
  section{ padding: 64px 0; }
  .hero__inner{ padding: 110px 20px 90px; }
  .hero h1{ font-size:1.9rem; }
  .cards--4{ grid-template-columns: 1fr; }
  .price-grid{ grid-template-columns: 1fr; }
  .cta__inner{ flex-direction:column; text-align:center; }
  .footer__inner{ flex-direction:column; text-align:center; }
}