:root {
  --color-accent: #800211;
  --color-accent-hover: #60010D;
  --color-bg-main: #1C1C1C;
  --color-bg-card: #141414;
  --color-border: #474A51;
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #B0B3B8;
  --font-main: 'Montserrat', sans-serif;
  --h1-size: clamp(2rem, 5vw, 3.5rem);
  --h2-size: clamp(1.5rem, 4vw, 2.5rem);
  --body-size: 1rem;
  --container-width: 1280px;
  --section-padding: 80px 0;
  --border-radius: 4px;
  --transition: 0.3s ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--color-bg-main);
  color: var(--color-text-primary);
  font-family: var(--font-main);
  font-size: var(--body-size);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  position: relative;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  background:
    radial-gradient(ellipse 70% 50% at 20% 30%, rgba(71, 74, 81, 0.12) 0%, transparent 65%),
    radial-gradient(ellipse 60% 45% at 80% 70%, rgba(71, 74, 81, 0.08) 0%, transparent 65%),
    radial-gradient(ellipse 50% 40% at 50% 50%, rgba(71, 74, 81, 0.06) 0%, transparent 55%);
  animation: haze 16s ease-in-out infinite alternate;
}

@keyframes haze {
  0%   { transform: translate(0, 0) scale(1); opacity: 0.6; }
  33%  { transform: translate(3%, -2%) scale(1.08); opacity: 1; }
  66%  { transform: translate(-2%, 3%) scale(0.92); opacity: 0.8; }
  100% { transform: translate(2%, 1%) scale(1.05); opacity: 0.6; }
}

a {
  text-decoration: none;
  color: inherit;
  transition: var(--transition);
}

img {
  max-width: 100%;
  display: block;
}

ul {
  list-style: none;
}

main {
  position: relative;
  z-index: 1;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 20px;
}

.section {
  padding: var(--section-padding);
}

.section__title {
  font-size: var(--h2-size);
  font-weight: 700;
  margin-bottom: 48px;
  position: relative;
  display: inline-block;
}

.section__title::after {
  content: '';
  position: absolute;
  bottom: -8px;
  left: 0;
  width: 60px;
  height: 3px;
  background: var(--color-accent);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 36px;
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 600;
  border: 2px solid transparent;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: var(--transition);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-accent);
  color: var(--color-text-primary);
  border-color: var(--color-accent);
}

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

.btn--outline {
  background: transparent;
  color: var(--color-text-primary);
  border-color: var(--color-border);
}

.btn--outline:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ========== HEADER ========== */

.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 100;
  padding: 12px 0;
  transition: var(--transition);
}

.header.scrolled {
  background: rgba(28, 28, 28, 0.95);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--color-border);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

.header__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  width: 230px;
  max-width: 100%;
  flex-shrink: 0;
}

.header__logo-img {
  width: 100%;
  height: auto;
  display: block;
}

.header__logo-tagline {
  font-family: var(--font-main);
  font-size: 0.5rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.2;
  width: 100%;
  display: block;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-shrink: 0;
}

.header__phone {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--color-text-primary);
  white-space: nowrap;
  transition: var(--transition);
}

.header__phone:hover {
  color: var(--color-accent);
}

.header__cta {
  padding: 10px 24px;
  font-size: 0.75rem;
}

/* ========== BURGER / NAV OVERLAY ========== */

.header__nav {
  position: fixed;
  inset: 0;
  background: var(--color-bg-main);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 48px;
  transform: translateX(100%);
  transition: transform 0.4s ease;
  z-index: 99;
}

.header__nav.active {
  transform: translateX(0);
}

.header__menu {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 40px;
}

.header__menu-social {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
  justify-content: center;
  padding-top: 16px;
  border-top: 1px solid var(--color-border);
}

.header__link {
  font-size: 1.2rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.15em;
  color: var(--color-text-secondary);
  transition: var(--transition);
  position: relative;
}

.header__link::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: var(--transition);
}

.header__link:hover {
  color: var(--color-text-primary);
}

.header__link:hover::after {
  width: 100%;
}

.header__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  cursor: pointer;
  padding: 8px;
  z-index: 101;
  transition: border-color 0.3s ease;
}

.header__burger:hover {
  border-color: var(--color-accent);
}

.header__burger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--color-text-primary);
  transition: var(--transition);
  border-radius: 2px;
}

.header__burger.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.header__burger.active span:nth-child(2) {
  opacity: 0;
}

.header__burger.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ========== HERO ========== */

.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  position: relative;
  overflow: hidden;
  padding-top: 100px;
}

.hero__image {
  position: absolute;
  right: -5%;
  bottom: 0;
  width: 45%;
  max-width: 560px;
  z-index: 0;
  pointer-events: none;
  will-change: transform;
}

.hero__image::before {
  content: '';
  position: absolute;
  bottom: 0;
  right: 0;
  width: 110%;
  height: 110%;
  background: radial-gradient(ellipse 80% 60% at 70% 80%, rgba(71, 74, 81, 0.3) 0%, transparent 70%);
  pointer-events: none;
}

.hero__image img {
  width: 100%;
  height: auto;
  display: block;
  position: relative;
  filter: grayscale(0.3) brightness(0.8);
  mask-image: linear-gradient(to top, black 60%, transparent 100%);
  -webkit-mask-image: linear-gradient(to top, black 60%, transparent 100%);
}

.hero::before {
  content: '';
  position: absolute;
  top: -50%;
  left: -50%;
  width: 200%;
  height: 200%;
  background: radial-gradient(circle at 70% 60%, rgba(128, 2, 17, 0.08) 0%, transparent 60%);
  pointer-events: none;
}

.hero__inner {
  position: relative;
  z-index: 1;
}

.hero__title {
  font-size: var(--h1-size);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 24px;
  max-width: 800px;
}

.hero__subtitle {
  font-size: 1.1rem;
  color: var(--color-text-secondary);
  max-width: 580px;
  margin-bottom: 40px;
  line-height: 1.7;
}

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

/* ========== SERVICES ========== */

.services__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  background: var(--color-bg-card);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px 24px;
  display: flex;
  flex-direction: column;
  transition: var(--transition);
}

.service-card:hover {
  border-color: var(--color-accent);
  transform: translateY(-6px);
}

.service-card__icon {
  color: var(--color-accent);
  margin-bottom: 16px;
}

.service-card__title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 12px;
}

.service-card__list {
  margin-bottom: 20px;
  flex: 1;
}

.service-card__list li {
  font-size: 0.85rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
  padding-left: 14px;
  position: relative;
}

.service-card__list li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--color-accent);
}

.service-card__link {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
  transition: var(--transition);
  align-self: flex-start;
}

.service-card__link:hover {
  color: var(--color-accent-hover);
}

/* ========== PORTFOLIO ========== */

.portfolio__tabs {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 32px;
}

.portfolio__tab {
  padding: 8px 20px;
  font-family: var(--font-main);
  font-size: 0.8rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  color: var(--color-text-secondary);
  cursor: pointer;
  transition: var(--transition);
}

.portfolio__tab:hover {
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

.portfolio__tab.active {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-text-primary);
}

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

.portfolio__item {
  position: relative;
  overflow: hidden;
  border-radius: var(--border-radius);
  aspect-ratio: 4 / 3;
  cursor: pointer;
  transition: opacity 0.3s ease;
}

.portfolio__item.hidden {
  display: none;
}

.portfolio__item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.portfolio__item:hover img {
  transform: scale(1.08);
}

.portfolio__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0,0,0,0.85) 0%, transparent 60%);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  padding: 20px;
  opacity: 0;
  transition: opacity 0.3s ease;
}

.portfolio__item:hover .portfolio__overlay {
  opacity: 1;
}

.portfolio__item-title {
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text-primary);
  margin-bottom: 4px;
}

.portfolio__item-action {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--color-accent);
}

/* ========== PROCESS ========== */

.process__timeline {
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 800px;
  margin: 0 auto;
}

.process__step {
  display: flex;
  gap: 24px;
  align-items: flex-start;
  position: relative;
  padding-left: 80px;
}

.process__step::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 52px;
  bottom: -32px;
  width: 1px;
  background: var(--color-border);
}

.process__step:last-child::before {
  display: none;
}

.process__step-num {
  position: absolute;
  left: 0;
  top: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-accent);
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-card);
  flex-shrink: 0;
}

.process__step-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.process__step-text {
  font-size: 0.9rem;
  color: var(--color-text-secondary);
  line-height: 1.7;
}

/* ========== CONTACT ========== */

.contact__grid {
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 60px;
  align-items: start;
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.form__group {
  position: relative;
}

.form__input {
  width: 100%;
  padding: 16px 0 12px;
  font-family: var(--font-main);
  font-size: 1rem;
  color: var(--color-text-primary);
  background: transparent;
  border: none;
  border-bottom: 1px solid var(--color-border);
  outline: none;
  transition: var(--transition);
  resize: none;
  border-radius: 0;
  -webkit-appearance: none;
}

.form__input:focus {
  border-color: var(--color-accent);
}

.form__input:focus ~ .form__label,
.form__input:not(:placeholder-shown) ~ .form__label {
  transform: translateY(-24px);
  font-size: 0.75rem;
  color: var(--color-accent);
}

.form__select {
  cursor: pointer;
}

.form__select option {
  background: var(--color-bg-main);
  color: var(--color-text-primary);
}

.form__label {
  position: absolute;
  left: 0;
  top: 16px;
  color: var(--color-text-secondary);
  font-size: 1rem;
  transition: var(--transition);
  pointer-events: none;
}

.form__textarea {
  min-height: 120px;
  resize: vertical;
}

.form__submit {
  align-self: flex-start;
  margin-top: 8px;
}

.contact__heading {
  font-size: 1.3rem;
  font-weight: 700;
  margin-bottom: 20px;
}

.contact__info p {
  color: var(--color-text-secondary);
  margin-bottom: 12px;
  font-size: 1rem;
}

.contact__info a {
  transition: var(--transition);
}

.contact__info a:hover {
  color: var(--color-accent);
}

.contact__social {
  display: flex;
  gap: 20px;
  margin-top: 24px;
  flex-wrap: wrap;
}

.contact__social-link {
  font-family: var(--font-main);
  font-size: 0.85rem;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: 3px;
  transition: var(--transition);
}

.contact__social-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 1px;
  background: var(--color-accent);
  transition: var(--transition);
}

.contact__social-link:hover {
  color: var(--color-accent);
}

.contact__social-link:hover::after {
  width: 100%;
}

/* ========== BACK TO TOP ========== */

.totop {
  position: fixed;
  bottom: 32px;
  right: 32px;
  z-index: 99;
  width: 48px;
  height: 48px;
  border: 1px solid var(--color-border);
  border-radius: 50%;
  background: var(--color-bg-card);
  color: var(--color-text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s, border-color 0.3s;
}

.totop.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.totop:hover {
  border-color: var(--color-accent);
  color: var(--color-accent);
}

/* ========== FOOTER ========== */

.footer {
  border-top: 1px solid var(--color-border);
  padding: 40px 0;
}

.footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 24px;
}

.footer__brand {
  display: flex;
  align-items: center;
}

.footer__logo {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  width: 180px;
  max-width: 100%;
}

.footer__logo-img {
  width: 100%;
  height: auto;
  display: block;
}

.footer__logo-tagline {
  font-family: var(--font-main);
  font-size: 0.4rem;
  font-weight: 400;
  letter-spacing: 0.02em;
  color: var(--color-text-secondary);
  text-align: center;
  line-height: 1.2;
  width: 100%;
  display: block;
}

.footer__nav {
  display: flex;
  gap: 24px;
  flex-wrap: wrap;
}

.footer__nav a {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  transition: var(--transition);
}

.footer__nav a:hover {
  color: var(--color-accent);
}

.footer__social {
  display: flex;
  gap: 20px;
}

.footer__copy {
  font-size: 0.8rem;
  color: var(--color-text-secondary);
  width: 100%;
  text-align: center;
  margin-top: 16px;
}

/* ========== ANIMATIONS ========== */

.fade-in {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ========== RESPONSIVE ========== */

@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .about__grid {
    gap: 40px;
  }

  .header__cta {
    display: none;
  }
}

@media (max-width: 768px) {
  .section {
    padding: 60px 0;
  }

  .section__title {
    margin-bottom: 36px;
  }

  .header__logo {
    width: 160px;
  }

  .header__phone {
    font-size: 0.8rem;
  }

  .header__cta {
    display: none;
  }

  .hero__image {
    display: none;
  }

  .header__link {
    font-size: 1.1rem;
  }

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

  .portfolio__grid {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .portfolio__tabs {
    gap: 6px;
  }

  .portfolio__tab {
    font-size: 0.7rem;
    padding: 6px 14px;
  }

  .process__step {
    padding-left: 60px;
  }

  .process__step-num {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }

  .contact__grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .hero__title {
    font-size: clamp(1.8rem, 8vw, 2.5rem);
  }

  .hero__subtitle {
    font-size: 1rem;
  }

  .hero__actions {
    flex-direction: column;
  }

  .btn {
    width: 100%;
    text-align: center;
  }

  .form__submit {
    width: 100%;
  }

  .footer__inner {
    flex-direction: column;
    text-align: center;
  }

  .footer__nav {
    justify-content: center;
  }

  .footer__social {
    justify-content: center;
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 16px;
  }

  .section {
    padding: 48px 0;
  }

  .header__logo {
    width: 130px;
  }

  .header__logo-tagline {
    font-size: 0.4rem;
  }

  .header__phone {
    font-size: 0.7rem;
  }

  .process__step {
    padding-left: 50px;
    gap: 16px;
  }

  .process__step-num {
    width: 36px;
    height: 36px;
    font-size: 0.85rem;
  }
}