/* =============================================================
   ЧЕСТНЫЙ ЗАБОР — styles.css
   Mobile-first, no framework, pure CSS
============================================================= */

/* ── Reset & Base ─────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* Hide dialogs when not open — critical for cross-browser */
dialog:not([open]) { display: none !important; }

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
  overflow-x: hidden;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font: inherit; border: none; background: none; }
ul { list-style: none; }
address { font-style: normal; }

/* ── CSS Variables ────────────────────────────────────────── */
:root {
  --primary:        #1B2A3B;
  --primary-mid:    #243447;
  --accent:         #F5700A;
  --accent-hover:   #D4580A;
  --bg:             #FFFFFF;
  --bg-alt:         #F4F6F9;
  --bg-dark:        #111D28;
  --text:           #1A1A2E;
  --text-secondary: #5A6475;
  --text-muted:     #9AA3AF;
  --border:         #E2E6EA;
  --success:        #27AE60;
  --radius:         10px;
  --radius-sm:      6px;
  --shadow:         0 2px 16px rgba(0,0,0,.08);
  --shadow-md:      0 4px 32px rgba(0,0,0,.12);
  --transition:     .2s ease;
}

/* ── Container ────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 20px;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: var(--radius-sm);
  font-size: 15px;
  font-weight: 600;
  line-height: 1;
  transition: background var(--transition), color var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
  text-align: center;
}
.btn:active { transform: scale(.98); }

.btn--primary {
  background: var(--accent);
  color: #fff;
}
.btn--primary:hover { background: var(--accent-hover); }

.btn--outline {
  background: transparent;
  color: #fff;
  border: 2px solid rgba(255,255,255,.7);
}
.btn--outline:hover { background: rgba(255,255,255,.12); border-color: #fff; }

.btn--ghost {
  background: transparent;
  color: var(--accent);
  padding: 0;
  font-size: 14px;
}
.btn--ghost:hover { color: var(--accent-hover); }

.btn--sm  { padding: 9px 18px; font-size: 14px; }
.btn--lg  { padding: 15px 32px; font-size: 16px; }
.btn--full { width: 100%; }

/* ── Section commons ──────────────────────────────────────── */
.section { padding: 64px 0; }

.section__header {
  text-align: center;
  margin-bottom: 44px;
}
.section__header--light .section__title,
.section__header--light .section__subtitle { color: #fff; }
.section__header--light .section__subtitle { opacity: .75; }

.section__title {
  font-size: clamp(26px, 4vw, 38px);
  font-weight: 800;
  color: var(--text);
  line-height: 1.15;
  margin-bottom: 10px;
}
.section__subtitle {
  font-size: 16px;
  color: var(--text-secondary);
  max-width: 520px;
  margin: 0 auto;
}

/* ── Scroll-reveal ────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity .5s ease, transform .5s ease;
}
.reveal.is-visible {
  opacity: 1;
  transform: none;
}

/* =============================================================
   HEADER
============================================================= */
.header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--primary);
  transition: box-shadow var(--transition);
}
.header.is-scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.25); }

.header__inner {
  display: flex;
  align-items: center;
  gap: 24px;
  height: 68px;
}

/* Logo */
.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}
.logo__icon { flex-shrink: 0; }
.logo__text {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
  align-items: center;
}
.logo__name {
  font-size: 16px;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.2px;
}
.logo__suffix {
  font-size: 10px;
  font-weight: 700;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 2.5px;
}

/* Nav */
.nav {
  display: none;
  gap: 4px;
  margin: 0 auto;
}
.nav__link {
  padding: 6px 12px;
  font-size: 14px;
  font-weight: 500;
  color: rgba(255,255,255,.75);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav__link:hover { color: #fff; background: rgba(255,255,255,.08); }

/* Header right */
.header__right {
  display: none;
  align-items: center;
  gap: 16px;
  margin-left: auto;
}
.header__phone {
  font-size: 15px;
  font-weight: 600;
  color: #fff;
  transition: color var(--transition);
}
.header__phone:hover { color: var(--accent); }

/* Burger */
.burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  margin-left: auto;
}
.burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.burger.is-open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.is-open span:nth-child(2) { opacity: 0; }
.burger.is-open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* =============================================================
   DRAWER (mobile)
============================================================= */
.drawer {
  position: fixed;
  top: 68px; right: 0; bottom: 0;
  width: min(320px, 90vw);
  background: var(--primary);
  z-index: 99;
  display: flex;
  flex-direction: column;
  transform: translateX(100%);
  transition: transform .3s ease;
  overflow-y: auto;
}
.drawer.is-open { transform: translateX(0); }

.drawer__nav {
  padding: 24px 24px 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.drawer__link {
  display: block;
  padding: 12px 16px;
  font-size: 16px;
  font-weight: 500;
  color: rgba(255,255,255,.8);
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.drawer__link:hover { color: #fff; background: rgba(255,255,255,.08); }

.drawer__footer {
  margin-top: auto;
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 16px;
  border-top: 1px solid rgba(255,255,255,.1);
}
.drawer__phone {
  font-size: 20px;
  font-weight: 700;
  color: #fff;
  display: block;
}
.drawer__messengers { display: flex; gap: 10px; }

.drawer-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.5);
  z-index: 98;
  opacity: 0;
  pointer-events: none;
  transition: opacity .3s ease;
  backdrop-filter: blur(2px);
}
.drawer-overlay.is-visible { opacity: 1; pointer-events: auto; }

/* Messenger button */
.messenger-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 600;
  color: #fff;
  background: rgba(255,255,255,.1);
  transition: background var(--transition);
}
.messenger-btn:hover { background: rgba(255,255,255,.18); }

/* =============================================================
   HERO
============================================================= */
.hero {
  position: relative;
  min-height: 100svh;
  display: flex;
  flex-direction: column;
  padding-top: 68px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background-size: cover;
  background-position: center;
  background-repeat: no-repeat;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(17,29,40,.72) 0%,
    rgba(17,29,40,.60) 50%,
    rgba(17,29,40,.85) 100%
  );
}

.hero__container {
  position: relative;
  z-index: 1;
  flex: 1;
  display: flex;
  align-items: center;
  padding-top: 48px;
  padding-bottom: 160px;
}

.hero__content { max-width: 640px; }

.hero__title {
  font-size: clamp(32px, 6vw, 58px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
  margin-bottom: 18px;
}

.hero__subtitle {
  font-size: clamp(14px, 2vw, 17px);
  color: rgba(255,255,255,.8);
  margin-bottom: 36px;
  line-height: 1.5;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 28px;
}

.hero__phone {
  display: inline-block;
  font-size: 22px;
  font-weight: 700;
  color: #fff;
  transition: color var(--transition);
}
.hero__phone:hover { color: var(--accent); }

/* Stats bar */
.hero__stats-bar {
  position: relative;
  z-index: 1;
  background: rgba(255,255,255,.06);
  backdrop-filter: blur(12px);
  border-top: 1px solid rgba(255,255,255,.1);
}

.stats-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 0;
  padding: 20px 0;
}

.stats-bar__item {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 12px;
  gap: 4px;
}

.stats-bar__num {
  font-size: clamp(20px, 3vw, 28px);
  font-weight: 800;
  color: #fff;
  line-height: 1;
}

.stats-bar__label {
  font-size: 12px;
  color: rgba(255,255,255,.6);
  text-align: center;
}

.stats-bar__divider {
  display: none;
  width: 1px;
  background: rgba(255,255,255,.15);
  margin: 12px 0;
}

/* =============================================================
   SERVICES
============================================================= */
.services { background: var(--bg); }

.services__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 20px;
}

.service-card {
  border-radius: var(--radius);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--bg);
  transition: box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.service-card__img-wrap {
  aspect-ratio: 16 / 10;
  overflow: hidden;
}
.service-card__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform .4s ease;
}
.service-card:hover .service-card__img { transform: scale(1.04); }

.service-card__body {
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.service-card__title {
  font-size: 18px;
  font-weight: 700;
  color: var(--text);
}
.service-card__desc {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.5;
  flex: 1;
}
.service-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 4px;
}
.service-card__price {
  font-size: 17px;
  font-weight: 700;
  color: var(--accent);
}

/* =============================================================
   CALCULATOR
============================================================= */
.calculator { background: var(--bg-alt); }

.calc__wrap {
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.calc__params {
  display: flex;
  flex-direction: column;
  gap: 24px;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
}

.calc__group { display: flex; flex-direction: column; gap: 10px; }

.calc__label {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: .5px;
}
.calc__label strong { color: var(--accent); font-weight: 700; }

.calc__options {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.calc__opt {
  padding: 8px 16px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-secondary);
  background: var(--bg-alt);
  border: 1.5px solid var(--border);
  transition: all var(--transition);
}
.calc__opt:hover { border-color: var(--accent); color: var(--accent); }
.calc__opt.is-active {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  font-weight: 600;
}

/* Slider */
.calc__slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 4px;
  border-radius: 4px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.calc__slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
  cursor: pointer;
}
.calc__slider::-moz-range-thumb {
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid #fff;
  box-shadow: 0 0 0 2px var(--accent);
  cursor: pointer;
}
.calc__slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
}

/* Result card */
.calc__result {
  background: var(--primary);
  border-radius: var(--radius);
  overflow: hidden;
}
.calc__result-inner {
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.calc__result-label {
  font-size: 13px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .5px;
  color: rgba(255,255,255,.55);
}

.calc__result-price {
  font-size: clamp(24px, 4vw, 32px);
  font-weight: 800;
  color: #fff;
  line-height: 1.1;
}

.calc__includes {
  display: flex;
  flex-direction: column;
  gap: 8px;
  padding: 16px;
  background: rgba(255,255,255,.06);
  border-radius: var(--radius-sm);
}
.calc__includes li {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.8);
}

.calc__lead { display: flex; flex-direction: column; gap: 10px; }
.calc__lead-hint {
  font-size: 14px;
  color: rgba(255,255,255,.65);
  line-height: 1.4;
}
.calc__input {
  width: 100%;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  border: 1.5px solid rgba(255,255,255,.2);
  background: rgba(255,255,255,.08);
  color: #fff;
  font: inherit;
  font-size: 15px;
  transition: border-color var(--transition);
  outline: none;
}
.calc__input::placeholder { color: rgba(255,255,255,.4); }
.calc__input:focus { border-color: var(--accent); }
.calc__privacy {
  font-size: 12px;
  color: rgba(255,255,255,.4);
  line-height: 1.4;
}
.calc__privacy-link { color: rgba(255,255,255,.6); text-decoration: underline; }

/* =============================================================
   PROCESS
============================================================= */
.process { background: var(--bg-dark); }

.process__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0;
  counter-reset: steps;
}

.process__step {
  display: flex;
  gap: 20px;
  padding: 24px 0;
  border-bottom: 1px solid rgba(255,255,255,.08);
  align-items: flex-start;
}
.process__step:last-child { border-bottom: none; }

.process__num {
  font-size: 36px;
  font-weight: 800;
  color: rgba(255,255,255,.1);
  line-height: 1;
  flex-shrink: 0;
  min-width: 52px;
}

.process__title {
  font-size: 17px;
  font-weight: 700;
  color: #fff;
  margin-bottom: 4px;
}

.process__text {
  font-size: 14px;
  color: rgba(255,255,255,.6);
  line-height: 1.55;
}

.process__step--accent .process__num { color: var(--accent); opacity: .5; }
.process__step--accent .process__title { color: var(--accent); }
.process__step--accent strong { color: #fff; }

/* =============================================================
   PORTFOLIO
============================================================= */
.portfolio { background: var(--bg); }

.portfolio__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  grid-template-rows: auto;
  gap: 10px;
}

.portfolio__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: var(--bg-alt);
  border: none;
  padding: 0;
  display: block;
  width: 100%;
}
.portfolio__item--featured {
  grid-column: 1 / -1;
}

.portfolio__img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  aspect-ratio: 16/10;
  display: block;
  transition: transform .4s ease;
}
.portfolio__item--featured .portfolio__img {
  aspect-ratio: 16/9;
}

.portfolio__item:hover .portfolio__img { transform: scale(1.04); }

.portfolio__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,.7) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  padding: 14px;
  opacity: 0;
  transition: opacity var(--transition);
}
.portfolio__item:hover .portfolio__overlay { opacity: 1; }
.portfolio__item:focus-visible .portfolio__overlay { opacity: 1; }

.portfolio__label {
  font-size: 13px;
  font-weight: 500;
  color: #fff;
  line-height: 1.3;
}
.portfolio__zoom { flex-shrink: 0; }

/* =============================================================
   WHY US
============================================================= */
.why-us { background: var(--bg-alt); }

.advantages__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.advantage {
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
  border: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.advantage:hover { box-shadow: var(--shadow); }

.advantage__icon {
  width: 60px;
  height: 60px;
  border-radius: var(--radius-sm);
  background: rgba(245,112,10,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
  margin-bottom: 16px;
}

.advantage__title {
  font-size: 17px;
  font-weight: 700;
  color: var(--text);
  margin-bottom: 8px;
}

.advantage__text {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.55;
}

/* =============================================================
   REVIEWS
============================================================= */
.reviews { background: var(--bg); }

.reviews__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

.review-card {
  background: var(--bg-alt);
  border-radius: var(--radius);
  padding: 24px;
  border: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.review-card__stars {
  color: #F5C518;
  font-size: 18px;
  letter-spacing: 2px;
}

.review-card__text {
  font-size: 14px;
  line-height: 1.65;
  color: var(--text);
  flex: 1;
}

.review-card__author {
  display: flex;
  align-items: center;
  gap: 12px;
}

.review-card__avatar {
  width: 42px;
  height: 42px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  font-size: 13px;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.review-card__name {
  font-size: 14px;
  font-weight: 700;
  color: var(--text);
}
.review-card__meta {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 2px;
}

/* =============================================================
   FAQ
============================================================= */
.faq { background: var(--bg-alt); }

.faq__list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.faq__item {
  background: var(--bg);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  overflow: hidden;
}

.faq__q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 18px 20px;
  text-align: left;
  font-size: 15px;
  font-weight: 600;
  color: var(--text);
  transition: color var(--transition);
}
.faq__q:hover { color: var(--accent); }
.faq__q[aria-expanded="true"] { color: var(--accent); }

.faq__arrow {
  flex-shrink: 0;
  transition: transform .25s ease;
}
.faq__q[aria-expanded="true"] .faq__arrow { transform: rotate(180deg); }

.faq__a {
  padding: 0 20px 18px;
}
.faq__a p {
  font-size: 14px;
  color: var(--text-secondary);
  line-height: 1.65;
}

/* =============================================================
   CTA SECTION
============================================================= */
.cta-section { background: var(--primary); }

.cta-section__inner {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.cta-section__title {
  font-size: clamp(24px, 4vw, 36px);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  margin-bottom: 12px;
}

.cta-section__subtitle {
  font-size: 16px;
  color: rgba(255,255,255,.7);
  margin-bottom: 24px;
}

.cta-trust {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 28px;
}
.cta-trust li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 15px;
  font-weight: 500;
  color: rgba(255,255,255,.85);
}

.cta-section__contacts {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.cta-section__phone {
  font-size: 26px;
  font-weight: 800;
  color: #fff;
  transition: color var(--transition);
}
.cta-section__phone:hover { color: var(--accent); }

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

/* CTA Form */
.cta-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  background: var(--bg);
  border-radius: var(--radius);
  padding: 28px;
}

.cta-form__input {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 15px;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color var(--transition);
}
.cta-form__input:focus { border-color: var(--accent); }
.cta-form__textarea { resize: vertical; min-height: 80px; }

.form__privacy {
  font-size: 12px;
  color: var(--text-muted);
  line-height: 1.4;
}
.form__privacy a { color: var(--text-secondary); text-decoration: underline; }

.form__success {
  text-align: center;
  padding: 32px 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}
.form__success h3 {
  font-size: 20px;
  font-weight: 700;
  color: var(--text);
}
.form__success p {
  font-size: 15px;
  color: var(--text-secondary);
}

/* =============================================================
   FOOTER
============================================================= */
.footer {
  background: var(--bg-dark);
  padding: 56px 0 0;
  color: rgba(255,255,255,.6);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 36px;
  margin-bottom: 48px;
}

.footer__tagline {
  font-size: 14px;
  color: rgba(255,255,255,.45);
  margin-top: 12px;
  line-height: 1.5;
}

.footer__socials {
  display: flex;
  gap: 10px;
  margin-top: 20px;
}
.footer__social {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.08);
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255,255,255,.6);
  transition: background var(--transition), color var(--transition);
}
.footer__social:hover { background: var(--accent); color: #fff; }

.footer__col-title {
  font-size: 13px;
  font-weight: 700;
  color: #fff;
  text-transform: uppercase;
  letter-spacing: .8px;
  margin-bottom: 16px;
}
.footer__links { display: flex; flex-direction: column; gap: 10px; }
.footer__links a {
  font-size: 14px;
  color: rgba(255,255,255,.5);
  transition: color var(--transition);
}
.footer__links a:hover { color: #fff; }

.footer__address {
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.footer__contact {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 14px;
  color: rgba(255,255,255,.55);
  transition: color var(--transition);
}
a.footer__contact:hover { color: #fff; }

.footer__bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding: 20px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  text-align: center;
}
.footer__copy { font-size: 13px; color: rgba(255,255,255,.35); }
.footer__legal {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  justify-content: center;
  font-size: 13px;
  color: rgba(255,255,255,.3);
}
.footer__legal-link {
  text-decoration: underline;
  transition: color var(--transition);
}
.footer__legal-link:hover { color: rgba(255,255,255,.7); }

/* =============================================================
   MOBILE STICKY BAR
============================================================= */
.sticky-bar {
  position: fixed;
  bottom: 0; left: 0; right: 0;
  z-index: 90;
  display: flex;
  box-shadow: 0 -2px 20px rgba(0,0,0,.2);
  /* Hidden by default, shown on mobile via media query */
}

.sticky-bar__btn {
  flex: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 12px;
  font-size: 15px;
  font-weight: 600;
  transition: background var(--transition);
}
.sticky-bar__btn--call {
  background: var(--primary);
  color: #fff;
  text-decoration: none;
}
.sticky-bar__btn--call:hover { background: var(--primary-mid); }
.sticky-bar__btn--order {
  background: var(--accent);
  color: #fff;
}
.sticky-bar__btn--order:hover { background: var(--accent-hover); }

/* =============================================================
   MODAL
============================================================= */
.modal {
  position: fixed;
  inset: 0;
  margin: auto;
  width: min(480px, calc(100% - 32px));
  max-height: calc(100dvh - 32px);
  border: none;
  border-radius: var(--radius);
  padding: 0;
  overflow: hidden;
  box-shadow: var(--shadow-md);
}
.modal::backdrop {
  background: rgba(0,0,0,.55);
  backdrop-filter: blur(3px);
}
.modal[open] { animation: modalIn .25s ease; }

@keyframes modalIn {
  from { opacity: 0; transform: scale(.96) translateY(8px); }
  to   { opacity: 1; transform: none; }
}

.modal__content {
  position: relative;
  background: var(--bg);
  padding: 36px 32px 28px;
  overflow-y: auto;
  max-height: calc(100dvh - 32px);
}

.modal__close {
  position: absolute;
  top: 16px; right: 16px;
  width: 36px; height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  transition: background var(--transition), color var(--transition);
}
.modal__close:hover { background: var(--bg-alt); color: var(--text); }

.modal__title {
  font-size: 22px;
  font-weight: 800;
  color: var(--text);
  margin-bottom: 6px;
}
.modal__subtitle {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 24px;
}
.modal__form { display: flex; flex-direction: column; gap: 12px; }
.modal__input {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font: inherit;
  font-size: 15px;
  color: var(--text);
  outline: none;
  transition: border-color var(--transition);
}
.modal__input:focus { border-color: var(--accent); }

/* =============================================================
   LIGHTBOX
============================================================= */
.lightbox {
  position: fixed;
  inset: 0;
  margin: 0;
  width: 100%;
  height: 100%;
  max-width: none;
  max-height: none;
  background: rgba(0,0,0,.92);
  border: none;
  padding: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}
.lightbox::backdrop { background: transparent; }
.lightbox[open] { animation: fadeIn .2s ease; }

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.lightbox__img {
  max-width: min(90vw, 1200px);
  max-height: 85dvh;
  object-fit: contain;
  border-radius: var(--radius-sm);
  user-select: none;
}

.lightbox__close {
  position: fixed;
  top: 16px; right: 16px;
  width: 44px; height: 44px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
  z-index: 1;
}
.lightbox__close:hover { background: rgba(255,255,255,.2); }

.lightbox__nav {
  position: fixed;
  top: 50%;
  transform: translateY(-50%);
  width: 48px; height: 48px;
  border-radius: 50%;
  background: rgba(255,255,255,.1);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition);
}
.lightbox__nav:hover { background: rgba(255,255,255,.2); }
.lightbox__nav--prev { left: 16px; }
.lightbox__nav--next { right: 16px; }

.lightbox__caption {
  position: fixed;
  bottom: 24px;
  left: 50%; transform: translateX(-50%);
  color: rgba(255,255,255,.65);
  font-size: 13px;
  white-space: nowrap;
  background: rgba(0,0,0,.4);
  padding: 6px 16px;
  border-radius: 20px;
}

/* =============================================================
   RESPONSIVE — Tablet (≥ 640px)
============================================================= */
@media (min-width: 640px) {
  .stats-bar {
    grid-template-columns: repeat(4, 1fr);
    padding: 24px 0;
  }
  .stats-bar__divider { display: block; }

  .services__grid { grid-template-columns: repeat(2, 1fr); }

  .advantages__grid { grid-template-columns: repeat(2, 1fr); }

  .reviews__grid { grid-template-columns: repeat(2, 1fr); }

  .footer__grid { grid-template-columns: repeat(2, 1fr); }

  .sticky-bar { display: none; }
}

/* =============================================================
   RESPONSIVE — Desktop (≥ 1024px)
============================================================= */
@media (min-width: 1024px) {
  /* Header */
  .nav { display: flex; }
  .header__right { display: flex; }
  .burger { display: none; }

  /* Hero */
  .hero__container { padding-bottom: 180px; }

  /* Services */
  .services__grid { grid-template-columns: repeat(3, 1fr); }

  /* Calculator */
  .calc__wrap {
    flex-direction: row;
    align-items: flex-start;
    gap: 28px;
  }
  .calc__params { flex: 1; }
  .calc__result {
    width: 340px;
    flex-shrink: 0;
    position: sticky;
    top: 88px;
  }

  /* Process */
  .process__grid {
    grid-template-columns: repeat(3, 1fr);
    gap: 0;
  }
  .process__step {
    flex-direction: column;
    padding: 32px 28px;
    border-bottom: none;
    border-right: 1px solid rgba(255,255,255,.08);
  }
  .process__step:nth-child(3),
  .process__step:last-child { border-right: none; }
  .process__step:nth-child(4),
  .process__step:nth-child(5),
  .process__step:nth-child(6) {
    border-top: 1px solid rgba(255,255,255,.08);
  }

  /* Portfolio */
  .portfolio__grid {
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: 260px 260px;
  }
  .portfolio__item--featured {
    grid-column: 1 / 3;
    grid-row: 1 / 3;
  }
  .portfolio__img { aspect-ratio: unset; height: 100%; }
  .portfolio__item--featured .portfolio__img { aspect-ratio: unset; height: 100%; }

  /* Advantages */
  .advantages__grid { grid-template-columns: repeat(3, 1fr); }

  /* Reviews */
  .reviews__grid { grid-template-columns: repeat(4, 1fr); }

  /* CTA */
  .cta-section__inner {
    flex-direction: row;
    align-items: flex-start;
    gap: 64px;
  }
  .cta-section__text { flex: 1; padding-top: 8px; }
  .cta-section__form-wrap { width: 420px; flex-shrink: 0; }

  /* Footer */
  .footer__grid { grid-template-columns: 1.8fr 1fr 1fr 1.4fr; }
  .footer__bottom { flex-direction: row; justify-content: space-between; text-align: left; }
}