/* ============================================================
   VARIABLES & RESET
   ============================================================ */
:root {
  --c-bg: #0f172a;
  --c-bg2: #1e293b;
  --c-accent: #f97316;
  --c-accent-h: #ea6c0b;
  --c-white: #ffffff;
  --c-light: #f8fafc;
  --c-light2: #f1f5f9;
  --c-text: #1e293b;
  --c-muted: #64748b;
  --c-border: #e2e8f0;
  --c-success: #16a34a;
  --c-error: #dc2626;

  --r: 10px;
  --r-sm: 6px;
  --sh: 0 1px 3px rgba(0,0,0,.10), 0 1px 2px rgba(0,0,0,.06);
  --sh-md: 0 4px 12px rgba(0,0,0,.08);
  --sh-lg: 0 10px 30px rgba(0,0,0,.12);
  --trans: .2s ease;
  --max-w: 1200px;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: 'Segoe UI', system-ui, -apple-system, sans-serif;
  color: var(--c-text);
  background: var(--c-white);
  line-height: 1.6;
  font-size: 16px;
}

a { text-decoration: none; color: inherit; transition: color var(--trans); }
a:hover { color: var(--c-accent); }
ul { list-style: none; }
img { max-width: 100%; display: block; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; font-size: 1rem; }

/* ============================================================
   CONTAINER
   ============================================================ */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 20px;
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--r-sm);
  font-size: .95rem;
  font-weight: 600;
  transition: all var(--trans);
  white-space: nowrap;
  cursor: pointer;
  border: 2px solid transparent;
}

.btn--accent {
  background: var(--c-accent);
  color: var(--c-white);
}
.btn--accent:hover { background: var(--c-accent-h); color: var(--c-white); }

.btn--outline {
  border-color: var(--c-accent);
  color: var(--c-accent);
  background: transparent;
}
.btn--outline:hover { background: var(--c-accent); color: var(--c-white); }

.btn--ghost {
  border-color: rgba(255,255,255,.4);
  color: var(--c-white);
  background: transparent;
}
.btn--ghost:hover { border-color: var(--c-white); background: rgba(255,255,255,.1); }

.btn--lg { padding: 14px 32px; font-size: 1.05rem; }
.btn--full { width: 100%; justify-content: center; }

/* ============================================================
   LOGO
   ============================================================ */
.logo {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  font-size: 1.25rem;
  color: var(--c-bg);
}
.logo--light { color: var(--c-white); }
.logo__icon { font-size: 1.4rem; }

/* ============================================================
   HEADER
   ============================================================ */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: rgba(255,255,255,.95);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--c-border);
  transition: box-shadow var(--trans);
}
.header.scrolled { box-shadow: var(--sh-md); }

.header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 64px;
}

.nav { margin-left: auto; }
.nav__list { display: flex; gap: 4px; }
.nav__link {
  padding: 6px 12px;
  border-radius: var(--r-sm);
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-text);
  transition: all var(--trans);
}
.nav__link:hover,
.nav__link.active { color: var(--c-accent); background: rgba(249,115,22,.08); }

.header__phone { margin-left: 8px; padding: 8px 20px; font-size: .9rem; }

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 4px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 24px; height: 2px;
  background: var(--c-text);
  border-radius: 2px;
  transition: all var(--trans);
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ============================================================
   HERO
   ============================================================ */
.hero {
  background: linear-gradient(135deg, var(--c-bg) 0%, var(--c-bg2) 100%);
  color: var(--c-white);
  padding-top: 88px;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  padding-top: 64px;
  padding-bottom: 48px;
}

.hero__badge {
  display: inline-block;
  background: rgba(249,115,22,.2);
  color: var(--c-accent);
  border: 1px solid rgba(249,115,22,.3);
  padding: 4px 14px;
  border-radius: 20px;
  font-size: .85rem;
  font-weight: 600;
  margin-bottom: 20px;
}

.hero__title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  line-height: 1.2;
  margin-bottom: 16px;
}

.hero__sub {
  font-size: 1.1rem;
  color: rgba(255,255,255,.75);
  margin-bottom: 32px;
  max-width: 480px;
}
.hero__sub strong { color: var(--c-white); }

.hero__actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 24px;
}

.hero__messengers {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.messenger-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 16px;
  border-radius: var(--r-sm);
  font-size: .85rem;
  font-weight: 600;
  transition: all var(--trans);
}
.messenger-btn--wa { background: #25d366; color: var(--c-white); }
.messenger-btn--wa:hover { background: #1da851; color: var(--c-white); }
.messenger-btn--tg { background: #229ed9; color: var(--c-white); }
.messenger-btn--tg:hover { background: #1a8bb8; color: var(--c-white); }
.messenger-btn--phone { background: var(--c-accent); color: var(--c-white); }
.messenger-btn--phone:hover { background: var(--c-accent-h); color: var(--c-white); }

/* Hero device cards */
.hero__image {
  display: flex;
  flex-direction: column;
  gap: 16px;
}
.hero__device-card {
  display: flex;
  align-items: center;
  gap: 16px;
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--r);
  padding: 16px 20px;
  backdrop-filter: blur(8px);
  transition: transform var(--trans);
}
.hero__device-card:hover { transform: translateX(6px); }
.device-icon { font-size: 2rem; }
.device-info { display: flex; flex-direction: column; }
.device-info span { font-size: .85rem; color: rgba(255,255,255,.65); }
.device-info strong { font-size: 1.1rem; color: var(--c-accent); }

/* Stats bar */
.hero__stats {
  background: rgba(0,0,0,.25);
  border-top: 1px solid rgba(255,255,255,.1);
}
.hero__stats-inner {
  display: flex;
  justify-content: space-around;
  flex-wrap: wrap;
  gap: 16px;
  padding: 24px 20px;
}
.stat { text-align: center; }
.stat__num { display: block; font-size: 1.6rem; font-weight: 700; color: var(--c-accent); }
.stat__label { font-size: .8rem; color: rgba(255,255,255,.6); text-transform: uppercase; letter-spacing: .05em; }

/* ============================================================
   SECTIONS
   ============================================================ */
.section { padding: 72px 0; }
.section--light { background: var(--c-light); }
.section--dark { background: var(--c-bg); color: var(--c-white); }

.section-header { text-align: center; margin-bottom: 48px; }
.section-title { font-size: clamp(1.6rem, 3vw, 2.2rem); font-weight: 700; margin-bottom: 12px; }
.section-sub { font-size: 1.05rem; color: var(--c-muted); max-width: 600px; margin: 0 auto; }
.section--dark .section-sub { color: rgba(255,255,255,.6); }

/* ============================================================
   SERVICES
   ============================================================ */
.tabs {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
  flex-wrap: wrap;
}
.tab {
  padding: 10px 20px;
  border-radius: 100px;
  border: 2px solid var(--c-border);
  font-size: .9rem;
  font-weight: 600;
  color: var(--c-muted);
  background: var(--c-white);
  transition: all var(--trans);
}
.tab:hover { border-color: var(--c-accent); color: var(--c-accent); }
.tab.active { background: var(--c-accent); border-color: var(--c-accent); color: var(--c-white); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
}

.service-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  transition: all var(--trans);
  box-shadow: var(--sh);
}
.service-card:hover { border-color: var(--c-accent); box-shadow: var(--sh-md); transform: translateY(-2px); }
.service-card.popular { border-color: var(--c-accent); position: relative; }
.service-card.popular::before {
  content: 'Популярное';
  position: absolute;
  top: -10px; left: 16px;
  background: var(--c-accent);
  color: var(--c-white);
  font-size: .72rem;
  font-weight: 700;
  padding: 2px 10px;
  border-radius: 10px;
  text-transform: uppercase;
  letter-spacing: .05em;
}

.service-card__name { font-size: .95rem; font-weight: 500; }
.service-card__price {
  text-align: right;
  white-space: nowrap;
}
.service-card__price-from { font-size: .75rem; color: var(--c-muted); display: block; }
.service-card__price-val { font-size: 1rem; font-weight: 700; color: var(--c-accent); }

/* Skeleton loader */
.skeleton {
  height: 72px;
  background: linear-gradient(90deg, #e2e8f0 25%, #f1f5f9 50%, #e2e8f0 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s infinite;
  border-radius: var(--r);
}
@keyframes shimmer { 0% { background-position: 200% 0; } 100% { background-position: -200% 0; } }

/* ============================================================
   ADVANTAGES
   ============================================================ */
.advantages {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: 28px;
}
.advantage {
  text-align: center;
  padding: 32px 24px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--r);
  transition: all var(--trans);
}
.advantage:hover { background: rgba(255,255,255,.08); transform: translateY(-4px); }
.advantage__icon { font-size: 2.5rem; margin-bottom: 16px; }
.advantage h3 { font-size: 1.1rem; font-weight: 600; margin-bottom: 10px; color: var(--c-white); }
.advantage p { font-size: .9rem; color: rgba(255,255,255,.65); line-height: 1.5; }

/* ============================================================
   STEPS
   ============================================================ */
.steps {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  flex-wrap: wrap;
}
.step {
  flex: 1;
  min-width: 200px;
  text-align: center;
  padding: 32px 20px;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  box-shadow: var(--sh);
}
.step__num {
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--c-accent);
  color: var(--c-white);
  font-size: 1.4rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 16px;
}
.step h3 { font-size: 1.05rem; font-weight: 600; margin-bottom: 8px; }
.step p { font-size: .9rem; color: var(--c-muted); }
.step__arrow {
  font-size: 2rem;
  color: var(--c-accent);
  display: flex;
  align-items: center;
  padding-top: 24px;
  align-self: center;
}

/* ============================================================
   CALCULATOR
   ============================================================ */
.calc {
  max-width: 680px;
  margin: 0 auto;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  padding: 36px 40px;
  box-shadow: var(--sh-lg);
}
.calc__step { margin-bottom: 28px; }
.calc__label {
  font-size: .85rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .06em;
  color: var(--c-muted);
  margin-bottom: 12px;
}
.calc__devices {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}
.device-btn {
  flex: 1;
  min-width: 120px;
  padding: 16px 12px;
  border: 2px solid var(--c-border);
  border-radius: var(--r);
  background: var(--c-white);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-muted);
  transition: all var(--trans);
}
.device-btn:hover { border-color: var(--c-accent); color: var(--c-text); }
.device-btn.active { border-color: var(--c-accent); color: var(--c-accent); background: rgba(249,115,22,.05); }
.device-btn__icon { font-size: 1.8rem; }

.calc__result {
  border-top: 1px solid var(--c-border);
  padding-top: 24px;
  margin-top: 8px;
}
.calc__result.hidden { display: none; }
.calc__result-label { font-size: .9rem; color: var(--c-muted); margin-bottom: 8px; }
.calc__price { font-size: 2rem; font-weight: 700; color: var(--c-accent); margin-bottom: 8px; }
.calc__note { font-size: .8rem; color: var(--c-muted); margin-bottom: 20px; }

/* ============================================================
   FORMS
   ============================================================ */
.form-section {
  max-width: 640px;
  margin: 0 auto;
}
.form-section__header { text-align: center; margin-bottom: 36px; }

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}
.form-group { margin-bottom: 20px; }
.form-label { display: block; font-size: .875rem; font-weight: 600; margin-bottom: 6px; color: var(--c-text); }
.required { color: var(--c-accent); }

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--c-border);
  border-radius: var(--r-sm);
  font-size: 1rem;
  color: var(--c-text);
  background: var(--c-white);
  transition: border-color var(--trans), box-shadow var(--trans);
  outline: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--c-accent);
  box-shadow: 0 0 0 3px rgba(249,115,22,.15);
}
.form-input.error, .form-select.error, .form-textarea.error {
  border-color: var(--c-error);
}
.form-textarea { resize: vertical; min-height: 100px; }
.form-error { display: block; font-size: .8rem; color: var(--c-error); margin-top: 4px; min-height: 1em; }

.form-success {
  text-align: center;
  padding: 48px 24px;
}
.form-success.hidden { display: none; }
.form-success__icon { font-size: 3.5rem; margin-bottom: 16px; }
.form-success h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.form-success p { color: var(--c-muted); margin-bottom: 24px; }

/* Spinner */
.spinner {
  width: 18px; height: 18px;
  border: 2.5px solid rgba(255,255,255,.4);
  border-top-color: var(--c-white);
  border-radius: 50%;
  animation: spin .6s linear infinite;
  display: inline-block;
}
.spinner.hidden { display: none; }
@keyframes spin { to { transform: rotate(360deg); } }

/* ============================================================
   REVIEWS
   ============================================================ */
.reviews-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 20px;
  margin-bottom: 32px;
}
.review-card {
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  padding: 24px;
  box-shadow: var(--sh);
  transition: box-shadow var(--trans);
}
.review-card:hover { box-shadow: var(--sh-md); }
.review-card__stars { color: #f59e0b; font-size: 1.1rem; margin-bottom: 12px; }
.review-card__text { font-size: .95rem; line-height: 1.6; color: var(--c-text); margin-bottom: 16px; }
.review-card__author { display: flex; justify-content: space-between; align-items: center; }
.review-card__name { font-weight: 600; font-size: .9rem; }
.review-card__date { font-size: .8rem; color: var(--c-muted); }

.reviews-action { text-align: center; margin-bottom: 32px; }

.review-form {
  max-width: 560px;
  margin: 0 auto;
  background: var(--c-white);
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  padding: 32px;
}
.review-form.hidden { display: none; }
.review-form h3 { font-size: 1.2rem; font-weight: 700; margin-bottom: 24px; }
.form-row-btns { display: flex; gap: 12px; }

/* Star rating */
.star-rating {
  display: flex;
  flex-direction: row-reverse;
  gap: 4px;
  width: fit-content;
}
.star-rating input { display: none; }
.star-rating label {
  font-size: 2rem;
  color: var(--c-border);
  cursor: pointer;
  transition: color var(--trans);
}
.star-rating input:checked ~ label,
.star-rating label:hover,
.star-rating label:hover ~ label { color: #f59e0b; }

/* ============================================================
   CONTACTS
   ============================================================ */
.contacts {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}
.contact-item {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
}
.contact-item__icon { font-size: 1.5rem; flex-shrink: 0; margin-top: 2px; }
.contact-item h4 { font-size: .85rem; font-weight: 600; text-transform: uppercase; letter-spacing: .05em; color: var(--c-muted); margin-bottom: 4px; }
.contact-item p, .contact-item a { font-size: 1rem; line-height: 1.5; }
.contact-item a:hover { color: var(--c-accent); }

.contact-btns { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 8px; }

.contacts__map iframe { border-radius: var(--r); display: block; }

/* ============================================================
   FOOTER
   ============================================================ */
.footer { background: var(--c-bg); color: rgba(255,255,255,.7); padding-top: 56px; }
.footer__inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 48px;
}
.footer__brand p { font-size: .9rem; margin-top: 12px; line-height: 1.6; }
.footer__nav h4, .footer__contact h4 {
  color: var(--c-white);
  font-size: .85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: .06em;
  margin-bottom: 16px;
}
.footer__nav ul { display: flex; flex-direction: column; gap: 10px; }
.footer__nav a { font-size: .9rem; color: rgba(255,255,255,.6); }
.footer__nav a:hover { color: var(--c-accent); }
.footer__contact p, .footer__contact a { font-size: .9rem; color: rgba(255,255,255,.6); margin-bottom: 8px; }
.footer__contact a:hover { color: var(--c-accent); }
.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 16px 0;
  font-size: .85rem;
}

/* ============================================================
   FAQ PAGE
   ============================================================ */
.page-hero {
  background: var(--c-bg);
  color: var(--c-white);
  padding: 100px 0 56px;
}
.breadcrumb {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: .85rem;
  color: rgba(255,255,255,.5);
  margin-bottom: 16px;
}
.breadcrumb a { color: rgba(255,255,255,.5); }
.breadcrumb a:hover { color: var(--c-white); }
.page-hero h1 { font-size: clamp(1.8rem, 3vw, 2.5rem); font-weight: 700; margin-bottom: 12px; }
.page-hero p { font-size: 1.05rem; color: rgba(255,255,255,.65); }

.faq-layout { display: grid; grid-template-columns: 220px 1fr; gap: 40px; margin-bottom: 56px; }

.faq-categories {
  display: flex;
  flex-direction: column;
  gap: 4px;
  align-self: start;
  position: sticky;
  top: 80px;
}
.faq-cat {
  text-align: left;
  padding: 10px 16px;
  border-radius: var(--r-sm);
  font-size: .9rem;
  font-weight: 500;
  color: var(--c-muted);
  transition: all var(--trans);
}
.faq-cat:hover { background: var(--c-light2); color: var(--c-text); }
.faq-cat.active { background: var(--c-accent); color: var(--c-white); }

.faq-list { display: flex; flex-direction: column; gap: 12px; }

.faq-item {
  border: 1px solid var(--c-border);
  border-radius: var(--r);
  overflow: hidden;
  transition: border-color var(--trans);
}
.faq-item.open { border-color: var(--c-accent); }

.faq-question {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  font-size: 1rem;
  font-weight: 600;
  text-align: left;
  background: var(--c-white);
  transition: background var(--trans);
  gap: 12px;
}
.faq-question:hover { background: var(--c-light); }
.faq-icon {
  font-size: 1.4rem;
  font-weight: 300;
  color: var(--c-accent);
  flex-shrink: 0;
  line-height: 1;
}

.faq-answer {
  display: none;
  padding: 0 20px 18px;
  font-size: .95rem;
  color: var(--c-muted);
  line-height: 1.7;
}
.faq-answer p + p { margin-top: 10px; }
.faq-answer ul { margin-top: 8px; padding-left: 20px; }
.faq-answer ul li { list-style: disc; margin-bottom: 6px; }
.faq-item.open .faq-answer { display: block; }

.faq-cta {
  text-align: center;
  background: var(--c-bg);
  color: var(--c-white);
  border-radius: var(--r);
  padding: 48px;
}
.faq-cta h3 { font-size: 1.5rem; font-weight: 700; margin-bottom: 8px; }
.faq-cta p { color: rgba(255,255,255,.65); margin-bottom: 24px; }
.faq-cta__btns { display: flex; justify-content: center; gap: 12px; flex-wrap: wrap; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 1024px) {
  .footer__inner { grid-template-columns: 1fr 1fr; gap: 32px; }
  .footer__brand { grid-column: 1 / -1; }
}

@media (max-width: 768px) {
  /* Header */
  .nav {
    display: none;
    position: fixed;
    top: 64px; left: 0; right: 0;
    background: var(--c-white);
    border-bottom: 1px solid var(--c-border);
    padding: 16px 20px;
  }
  .nav.open { display: block; }
  .nav__list { flex-direction: column; gap: 4px; }
  .nav__link { display: block; padding: 10px 12px; }
  .header__phone { display: none; }
  .burger { display: flex; }

  /* Hero */
  .hero__inner { grid-template-columns: 1fr; gap: 32px; }
  .hero__image { order: -1; flex-direction: row; overflow-x: auto; padding-bottom: 8px; }
  .hero__device-card { min-width: 160px; }
  .hero__stats-inner { justify-content: center; gap: 24px; }

  /* Sections */
  .section { padding: 48px 0; }

  /* Steps */
  .steps { flex-direction: column; }
  .step__arrow { display: none; }

  /* Calc */
  .calc { padding: 24px 20px; }

  /* Form */
  .form-row { grid-template-columns: 1fr; }

  /* Contacts */
  .contacts { grid-template-columns: 1fr; gap: 32px; }

  /* FAQ */
  .faq-layout { grid-template-columns: 1fr; }
  .faq-categories { flex-direction: row; flex-wrap: wrap; position: static; }

  /* Footer */
  .footer__inner { grid-template-columns: 1fr; }
  .footer__brand { grid-column: auto; }
}

@media (max-width: 480px) {
  .hero__actions { flex-direction: column; }
  .btn--lg { padding: 13px 24px; }
  .calc__devices { flex-direction: column; }
  .device-btn { flex-direction: row; justify-content: center; }
}