/* === CSS Variables === */
:root {
  --c-black: #0A0A0A;
  --c-dark: #141414;
  --c-red: #DC2626;
  --c-red-bright: #EF4444;
  --c-red-dark: #991B1B;
  --c-white: #F5F5F5;
  --c-gray: #A3A3A3;
  --c-gray-dark: #262626;
  --c-gray-light: #404040;
  --font-heading: 'Archivo Black', sans-serif;
  --font-body: 'Space Grotesk', sans-serif;
  --container: 1240px;
  --radius: 8px;
  --transition: 0.25s ease;
}

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

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

body {
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.6;
  color: var(--c-white);
  background: var(--c-black);
  overflow-x: hidden;
}

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

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

/* === Typography === */
h1, h2, h3, h4 {
  font-family: var(--font-heading);
  font-weight: 400;
  line-height: 1.15;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(32px, 5vw, 56px);
  margin-bottom: 48px;
}

h2 .accent { color: var(--c-red); }

.section-label {
  font-family: var(--font-heading);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--c-red);
  text-transform: uppercase;
  margin-bottom: 12px;
  display: block;
}

/* === Header / Nav === */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 16px 0;
  transition: background var(--transition), padding var(--transition);
}

.header.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  padding: 10px 0;
  border-bottom: 1px solid var(--c-gray-dark);
}

.header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-heading);
  font-size: 22px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--c-white);
}

.logo .accent { color: var(--c-red); }

.nav { display: flex; gap: 32px; align-items: center; }

.nav a {
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--c-gray);
  transition: color var(--transition);
  position: relative;
}

.nav a:hover,
.nav a:focus-visible { color: var(--c-white); }

.nav a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--c-red);
  transition: width var(--transition);
}

.nav a:hover::after,
.nav a:focus-visible::after { width: 100%; }

/* Mobile menu toggle */
.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 101;
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--c-white);
  transition: var(--transition);
  transform-origin: center;
}

.menu-toggle.active span:nth-child(1) { transform: rotate(45deg) translate(5px, 5px); }
.menu-toggle.active span:nth-child(2) { opacity: 0; }
.menu-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(5px, -5px); }

/* === Hero === */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding: 120px 0 80px;
}

.hero__bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse at 30% 50%, rgba(220, 38, 38, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse at 70% 30%, rgba(220, 38, 38, 0.06) 0%, transparent 50%);
  pointer-events: none;
}

.hero__grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(220, 38, 38, 0.04) 1px, transparent 1px),
    linear-gradient(90deg, rgba(220, 38, 38, 0.04) 1px, transparent 1px);
  background-size: 60px 60px;
  pointer-events: none;
  mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 30%, transparent 70%);
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 720px;
}

.hero__tag {
  display: inline-block;
  font-family: var(--font-heading);
  font-size: 13px;
  letter-spacing: 0.2em;
  color: var(--c-red);
  text-transform: uppercase;
  margin-bottom: 20px;
  padding: 8px 16px;
  border: 1px solid rgba(220, 38, 38, 0.3);
  border-radius: 4px;
}

.hero h1 {
  font-size: clamp(44px, 8vw, 88px);
  line-height: 0.95;
  margin-bottom: 24px;
}

.hero h1 .line { display: block; }
.hero h1 .accent { color: var(--c-red); }

.hero p {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--c-gray);
  max-width: 520px;
  margin-bottom: 40px;
  line-height: 1.6;
}

/* === Buttons === */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 16px 36px;
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  border-radius: var(--radius);
  transition: all var(--transition);
  border: 2px solid transparent;
}

.btn--primary {
  background: var(--c-red);
  color: var(--c-white);
  border-color: var(--c-red);
}

.btn--primary:hover,
.btn--primary:focus-visible {
  background: var(--c-red-bright);
  border-color: var(--c-red-bright);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(220, 38, 38, 0.35);
}

.btn--primary:active { transform: translateY(0); }

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

.btn--outline:hover,
.btn--outline:focus-visible {
  border-color: var(--c-red);
  color: var(--c-red);
}

.btn--large { padding: 20px 48px; font-size: 16px; }

.hero__buttons {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
}

/* === Section === */
.section {
  padding: 100px 0;
  position: relative;
}

section[id] { scroll-margin-top: 80px; }

.section--dark { background: var(--c-dark); }

.section__header {
  text-align: center;
  margin-bottom: 64px;
}

.section__header p {
  color: var(--c-gray);
  max-width: 600px;
  margin: 0 auto;
  font-size: 17px;
}

/* === About === */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.about__visual {
  position: relative;
  border-radius: var(--radius);
  overflow: hidden;
}

.about__visual-placeholder {
  width: 100%;
  aspect-ratio: 4/3;
  background: var(--c-gray-dark);
  border-radius: var(--radius);
  border: 1px solid var(--c-gray-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-gray);
  font-family: var(--font-heading);
  font-size: 14px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.about__text h3 {
  font-size: clamp(24px, 3vw, 32px);
  margin-bottom: 20px;
  text-transform: none;
}

.about__text p {
  color: var(--c-gray);
  margin-bottom: 16px;
  font-size: 16px;
  line-height: 1.7;
}

.about__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  margin-top: 40px;
}

.stat {
  text-align: center;
  padding: 24px 16px;
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid rgba(220, 38, 38, 0.12);
  border-radius: var(--radius);
}

.stat__value {
  font-family: var(--font-heading);
  font-size: 36px;
  color: var(--c-red);
  line-height: 1;
  margin-bottom: 8px;
}

.stat__label {
  font-size: 13px;
  color: var(--c-gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* === Services === */
.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.service-card {
  background: var(--c-gray-dark);
  border: 1px solid var(--c-gray-light);
  border-radius: var(--radius);
  padding: 40px 32px;
  transition: border-color var(--transition), transform var(--transition);
  position: relative;
  overflow: hidden;
}

.service-card:hover {
  border-color: var(--c-red);
  transform: translateY(-4px);
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--c-red);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.service-card:hover::before { transform: scaleX(1); }

.service-card__icon {
  width: 56px;
  height: 56px;
  background: rgba(220, 38, 38, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 24px;
}

.service-card__icon svg {
  width: 28px;
  height: 28px;
  stroke: var(--c-red);
  fill: none;
  stroke-width: 1.5;
}

.service-card h3 {
  font-size: 20px;
  margin-bottom: 12px;
  text-transform: none;
}

.service-card p {
  color: var(--c-gray);
  font-size: 14px;
  line-height: 1.7;
  margin-bottom: 20px;
}

.service-card__price {
  font-family: var(--font-heading);
  font-size: 22px;
  color: var(--c-red);
}

.service-card__price span {
  font-family: var(--font-body);
  font-size: 14px;
  color: var(--c-gray);
  font-weight: 400;
}

/* === Gallery === */
.gallery__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
}

.gallery__item {
  aspect-ratio: 4/3;
  background: var(--c-gray-dark);
  border-radius: var(--radius);
  border: 1px solid var(--c-gray-light);
  overflow: hidden;
  position: relative;
  transition: border-color var(--transition);
}

.gallery__item--clickable {
  cursor: pointer;
}

.gallery__item--clickable:hover { border-color: var(--c-red); }

.gallery__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.gallery__item-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-gray);
  font-family: var(--font-heading);
  font-size: 12px;
  letter-spacing: 0.08em;
}

/* === Lightbox === */
.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(10, 10, 10, 0.96);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition);
}

.lightbox.active {
  opacity: 1;
  pointer-events: auto;
}

.lightbox__img {
  max-width: 90vw;
  max-height: 85vh;
  object-fit: contain;
  border-radius: 4px;
}

.lightbox__close {
  position: absolute;
  top: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-white);
  font-size: 28px;
  border: 1px solid var(--c-gray-light);
  border-radius: 50%;
  transition: var(--transition);
  z-index: 2;
}

.lightbox__close:hover { border-color: var(--c-red); color: var(--c-red); }

.lightbox__prev,
.lightbox__next {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--c-white);
  font-size: 24px;
  border: 1px solid var(--c-gray-light);
  border-radius: 50%;
  transition: var(--transition);
}

.lightbox__prev { left: 24px; }
.lightbox__next { right: 24px; }

.lightbox__prev:hover,
.lightbox__next:hover { border-color: var(--c-red); color: var(--c-red); }

/* === FAQ === */
.faq__list {
  max-width: 800px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.faq__item {
  background: var(--c-gray-dark);
  border: 1px solid var(--c-gray-light);
  border-radius: var(--radius);
  overflow: hidden;
  transition: border-color var(--transition);
}

.faq__item.active { border-color: var(--c-red); }

.faq__question {
  width: 100%;
  padding: 20px 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--c-white);
  text-align: left;
  text-transform: none;
  letter-spacing: 0.02em;
  transition: color var(--transition);
}

.faq__question:hover { color: var(--c-red); }

.faq__icon {
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  position: relative;
  transition: transform var(--transition);
}

.faq__item.active .faq__icon { transform: rotate(45deg); }

.faq__icon::before,
.faq__icon::after {
  content: '';
  position: absolute;
  background: var(--c-red);
}

.faq__icon::before {
  width: 14px;
  height: 2px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq__icon::after {
  width: 2px;
  height: 14px;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
}

.faq__answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease, padding 0.35s ease;
}

.faq__item.active .faq__answer {
  max-height: 300px;
}

.faq__answer-inner {
  padding: 0 24px 20px;
  color: var(--c-gray);
  font-size: 15px;
  line-height: 1.7;
}

/* === Contacts === */
.contacts__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

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

.contact-item { display: flex; gap: 16px; align-items: flex-start; }

.contact-item__icon {
  width: 44px;
  height: 44px;
  flex-shrink: 0;
  background: rgba(220, 38, 38, 0.1);
  border-radius: var(--radius);
  display: flex;
  align-items: center;
  justify-content: center;
}

.contact-item__icon svg {
  width: 20px;
  height: 20px;
  stroke: var(--c-red);
  fill: none;
  stroke-width: 1.5;
}

.contact-item h4 {
  font-size: 14px;
  text-transform: none;
  margin-bottom: 4px;
  letter-spacing: 0.04em;
}

.contact-item a,
.contact-item address,
.contact-item__text {
  font-style: normal;
  color: var(--c-gray);
  font-size: 15px;
  transition: color var(--transition);
}

.contact-item a:hover { color: var(--c-red); }

/* Contact form */
.contact-form {
  background: var(--c-gray-dark);
  border: 1px solid var(--c-gray-light);
  border-radius: var(--radius);
  padding: 40px;
}

.contact-form h3 {
  font-size: 24px;
  margin-bottom: 8px;
  text-transform: none;
}

.contact-form > p {
  color: var(--c-gray);
  font-size: 14px;
  margin-bottom: 28px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-gray);
  margin-bottom: 6px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 16px;
  background: var(--c-black);
  border: 1px solid var(--c-gray-light);
  border-radius: var(--radius);
  color: var(--c-white);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--c-red);
}

.form-group textarea { resize: vertical; min-height: 100px; }

.form-submit {
  margin-top: 8px;
  width: 100%;
}

/* === CTA === */
.cta {
  text-align: center;
  padding: 120px 0;
  position: relative;
  overflow: hidden;
}

.cta__bg {
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at center, rgba(220, 38, 38, 0.1) 0%, transparent 60%);
  pointer-events: none;
}

.cta h2 {
  font-size: clamp(32px, 5vw, 52px);
  margin-bottom: 20px;
  position: relative;
}

.cta p {
  color: var(--c-gray);
  font-size: 18px;
  max-width: 500px;
  margin: 0 auto 36px;
  position: relative;
}

.cta .btn { position: relative; }

/* === Footer === */
.footer {
  padding: 48px 0;
  background: var(--c-dark);
  border-top: 1px solid var(--c-gray-dark);
}

.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 20px;
}

.footer__copy {
  color: var(--c-gray);
  font-size: 14px;
}

.footer__links {
  display: flex;
  gap: 24px;
}

.footer__links a {
  font-size: 14px;
  color: var(--c-gray);
  transition: color var(--transition);
}

.footer__links a:hover { color: var(--c-red); }

/* === Calculator === */
.calculator {
  max-width: 640px;
  margin: 0 auto;
}

.calculator__scenarios {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-bottom: 40px;
}

.calc-radio { cursor: pointer; }

.calc-radio input {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.calc-radio__card {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  padding: 24px 16px;
  background: var(--c-gray-dark);
  border: 2px solid var(--c-gray-light);
  border-radius: var(--radius);
  transition: border-color var(--transition), background var(--transition), transform var(--transition);
  text-align: center;
}

.calc-radio input:checked + .calc-radio__card {
  border-color: var(--c-red);
  background: rgba(220, 38, 38, 0.08);
}

.calc-radio input:focus-visible + .calc-radio__card {
  outline: 2px solid var(--c-red);
  outline-offset: 2px;
}

.calc-radio:hover .calc-radio__card {
  border-color: var(--c-red);
  transform: translateY(-2px);
}

.calc-radio__title {
  font-family: var(--font-heading);
  font-size: 16px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--c-white);
}

.calc-radio__price {
  font-size: 13px;
  color: var(--c-gray);
  letter-spacing: 0.03em;
}

.calculator__slider {
  margin-bottom: 40px;
}

.calculator__slider-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--c-gray);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 16px;
}

.range-wrap {
  display: flex;
  align-items: center;
  gap: 16px;
}

.range-mark {
  font-family: var(--font-heading);
  font-size: 14px;
  color: var(--c-gray);
  flex-shrink: 0;
  min-width: 20px;
}

input[type="range"] {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  background: var(--c-gray-light);
  border-radius: 3px;
  outline: none;
  cursor: pointer;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-red);
  border: 2px solid var(--c-white);
  cursor: pointer;
  transition: background var(--transition), transform var(--transition);
}

input[type="range"]::-webkit-slider-thumb:hover {
  background: var(--c-red-bright);
  transform: scale(1.15);
}

input[type="range"]::-moz-range-thumb {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  background: var(--c-red);
  border: 2px solid var(--c-white);
  cursor: pointer;
}

.calculator__players-display {
  text-align: center;
  margin-top: 16px;
}

.calculator__players-value {
  font-family: var(--font-heading);
  font-size: 48px;
  color: var(--c-red);
  line-height: 1;
}

.calculator__players-unit {
  font-family: var(--font-heading);
  font-size: 16px;
  color: var(--c-gray);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-left: 8px;
}

.calculator__total {
  text-align: center;
  padding: 32px;
  background: rgba(220, 38, 38, 0.06);
  border: 1px solid rgba(220, 38, 38, 0.2);
  border-radius: var(--radius);
  margin-bottom: 32px;
}

.calculator__total-label {
  display: block;
  font-size: 13px;
  color: var(--c-gray);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: 8px;
}

.calculator__total-value {
  font-family: var(--font-heading);
  font-size: 40px;
  color: var(--c-red);
}

.calculator__cta {
  display: flex;
  justify-content: center;
}

/* === Responsive === */
@media (max-width: 1024px) {
  .about__grid,
  .contacts__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .services__grid { grid-template-columns: repeat(2, 1fr); }
  .gallery__grid { grid-template-columns: repeat(2, 1fr); }
  .about__visual { order: -1; }
}

@media (max-width: 768px) {
  h2 { margin-bottom: 32px; }
  .section { padding: 72px 0; }

  .menu-toggle { display: flex; }

  .nav {
    position: fixed;
    inset: 0;
    background: rgba(10, 10, 10, 0.98);
    flex-direction: column;
    justify-content: center;
    gap: 40px;
    opacity: 0;
    pointer-events: none;
    transition: opacity var(--transition);
  }

  .nav.active {
    opacity: 1;
    pointer-events: auto;
  }

  .nav a { font-size: 20px; }

  .hero { padding: 140px 0 60px; text-align: center; }
  .hero__content { max-width: 100%; }
  .hero p { max-width: 100%; }
  .hero__buttons { justify-content: center; }

  .services__grid { grid-template-columns: 1fr; }
  .gallery__grid { grid-template-columns: 1fr; }
  .about__stats { grid-template-columns: 1fr; }

  .contact-form { padding: 24px; }
  .footer .container { flex-direction: column; text-align: center; }

  .lightbox__prev { left: 12px; }
  .lightbox__next { right: 12px; }
}