/* ============================================
   TERRABUILD CONSTRUCTION — DESIGN SYSTEM
   Индустриальный стиль, брутализм, асимметрия
   ============================================ */

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

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

html.no-js {
  scroll-behavior: auto;
}

body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  line-height: 1.6;
  color: var(--color-white);
  background-color: var(--bg-primary);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* --- CSS Variables --- */
:root {
  /* Colors */
  --color-concrete-dark: #1a1a1a;
  --color-concrete: #2d2d2d;
  --color-concrete-light: #4a4a4a;
  --color-metal: #6b6b6b;
  --color-metal-light: #8c8c8c;
  --color-orange: #ff6b00;
  --color-orange-hover: #e65c00;
  --color-orange-dark: #cc5200;
  --color-white: #ffffff;
  --color-off-white: #f5f5f5;
  --color-black: #0a0a0a;
  --color-success: #22c55e;
  --color-error: #ef4444;
  --color-warning: #f59e0b;
  
  /* Backgrounds */
  --bg-primary: #121212;
  --bg-secondary: #1e1e1e;
  --bg-tertiary: #2a2a2a;
  --bg-concrete: #3d3d3d;
  
  /* Typography */
  --font-display: 'Oswald', sans-serif;
  --font-body: 'Inter', sans-serif;
  
  --text-xs: clamp(0.75rem, 0.7rem + 0.25vw, 0.875rem);
  --text-sm: clamp(0.875rem, 0.8rem + 0.35vw, 1rem);
  --text-base: clamp(1rem, 0.9rem + 0.5vw, 1.125rem);
  --text-lg: clamp(1.125rem, 1rem + 0.6vw, 1.25rem);
  --text-xl: clamp(1.25rem, 1.1rem + 0.75vw, 1.5rem);
  --text-2xl: clamp(1.5rem, 1.2rem + 1.5vw, 2rem);
  --text-3xl: clamp(2rem, 1.5rem + 2.5vw, 3rem);
  --text-4xl: clamp(2.5rem, 2rem + 3vw, 4rem);
  --text-5xl: clamp(3rem, 2.5rem + 4vw, 6rem);
  --text-6xl: clamp(4rem, 3rem + 5vw, 8rem);
  
  --tracking-tight: -0.02em;
  --tracking-normal: 0;
  --tracking-wide: 0.05em;
  --tracking-wider: 0.1em;
  --tracking-widest: 0.2em;
  
  /* Layout */
  --container-max: 1440px;
  --container-padding: clamp(1rem, 5vw, 4rem);
  --section-padding-y: clamp(4rem, 8vw, 8rem);
  --section-padding-x: var(--container-padding);
  --grid-columns: 12;
  --grid-gap: clamp(1rem, 2vw, 2rem);
  
  /* Header */
  --header-height: 80px;
  --header-bg: rgba(18, 18, 18, 0.95);
  --header-backdrop: blur(10px);
  
  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 300ms ease;
  --transition-slow: 500ms ease;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.4);
  --shadow-lg: 0 10px 30px rgba(0, 0, 0, 0.5);
  --shadow-orange: 0 10px 30px rgba(255, 107, 0, 0.3);
  
  /* Focus */
  --focus-ring: 2px solid var(--color-orange);
  --focus-offset: 2px;
  
  /* Border radius */
  --radius-none: 0;
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
}

/* --- Typography --- */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.1;
  text-transform: uppercase;
  letter-spacing: var(--tracking-wide);
}

h1 { font-size: var(--text-5xl); }
h2 { font-size: var(--text-4xl); }
h3 { font-size: var(--text-2xl); }
h4 { font-size: var(--text-xl); }

p {
  color: var(--color-metal-light);
}

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

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

button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
}

input, select, textarea {
  font-family: inherit;
  font-size: inherit;
}

/* --- Utilities --- */
.container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
}

.section {
  padding: var(--section-padding-y) 0;
}

.section__title {
  margin-bottom: var(--section-padding-y);
}

.section__title-subtitle {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-orange);
  letter-spacing: var(--tracking-widest);
  margin-bottom: 0.5rem;
}

.section__title-main {
  display: block;
  font-size: var(--text-4xl);
}

.section__title--center {
  text-align: center;
}

.section__title--center .section__title-subtitle,
.section__title--center .section__title-main {
  display: inline-block;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 1rem 2rem;
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: var(--tracking-widest);
  border-radius: var(--radius-none);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn--primary {
  background: var(--color-orange);
  color: var(--color-white);
}

.btn--primary:hover {
  background: var(--color-orange-hover);
  transform: translateY(-2px);
  box-shadow: var(--shadow-orange);
}

.btn--outline {
  background: transparent;
  color: var(--color-orange);
  border: 2px solid var(--color-orange);
}

.btn--outline:hover {
  background: var(--color-orange);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn--full {
  width: 100%;
}

.btn:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* --- Preloader --- */
.preloader {
  position: fixed;
  inset: 0;
  background: var(--bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity var(--transition-slow), visibility var(--transition-slow);
}

.preloader--hidden {
  opacity: 0;
  visibility: hidden;
}

.preloader__content {
  display: inline-flex;
  flex-direction: column;
  align-items: stretch;
  text-align: center;
}

.preloader__logo {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  color: var(--color-white);
  margin-bottom: 2rem;
  white-space: nowrap;
}

.preloader__line {
  width: 100%;
  height: 2px;
  background: var(--color-concrete);
  overflow: hidden;
  position: relative;
}

.preloader__line::after {
  content: '';
  position: absolute;
  left: 0;
  top: 0;
  height: 100%;
  width: 50%;
  background: var(--color-orange);
  animation: loading 1.5s ease-in-out infinite;
}

@keyframes loading {
  0% { left: -50%; }
  100% { left: 100%; }
}

/* --- Header --- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  background: var(--header-bg);
  backdrop-filter: var(--header-backdrop);
  z-index: 1000;
  border-bottom: 1px solid var(--color-concrete);
  transition: transform var(--transition-base);
}

.header--hidden {
  transform: translateY(-100%);
}

.header__container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--section-padding-x);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 2rem;
}

.header__logo {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
}

.header__logo-text {
  color: var(--color-white);
}

.header__logo-accent {
  color: var(--color-orange);
}

.header__nav {
  display: none;
}

.nav__list {
  display: flex;
  list-style: none;
  gap: 2rem;
}

.nav__link {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  position: relative;
}

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

.nav__link:hover::after,
.nav__link--active::after {
  width: 100%;
}

.header__actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.header__phone {
  font-family: var(--font-display);
  font-weight: 500;
  display: none;
}

.header__callback {
  display: none;
}

.header__burger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  padding: 5px;
  z-index: 1001;
}

.header__burger span {
  display: block;
  width: 25px;
  height: 2px;
  background: var(--color-white);
  transition: all var(--transition-base);
}

.header__burger--active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

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

.header__burger--active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

@media (min-width: 768px) {
  .header__nav {
    display: block;
  }
  
  .header__phone {
    display: block;
  }
  
  .header__callback {
    display: inline-flex;
  }
  
  .header__burger {
    display: none;
  }
}

/* Mobile Nav */
.nav--mobile {
  position: fixed;
  top: var(--header-height);
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--bg-primary);
  padding: 2rem;
  transform: translateX(100%);
  transition: transform var(--transition-base);
}

.nav--mobile--active {
  transform: translateX(0);
}

.nav--mobile .nav__list {
  flex-direction: column;
  gap: 1.5rem;
}

.nav--mobile .nav__link {
  font-size: var(--text-2xl);
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--section-padding-y) var(--section-padding-x);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  background:
    linear-gradient(135deg, var(--bg-concrete) 0%, var(--bg-primary) 100%),
    repeating-linear-gradient(
      90deg,
      transparent 0px,
      transparent 2px,
      rgba(255, 107, 0, 0.03) 2px,
      rgba(255, 107, 0, 0.03) 4px
    );
  z-index: -2;
}

.hero__bg::before {
  content: '';
  position: absolute;
  inset: 0;
  z-index: 2;
  background:
    radial-gradient(ellipse at 20% 50%, rgba(255, 107, 0, 0.18) 0%, transparent 55%),
    radial-gradient(ellipse at 80% 50%, rgba(255, 107, 0, 0.08) 0%, transparent 50%),
    linear-gradient(180deg, rgba(15, 15, 17, 0.55) 0%, rgba(15, 15, 17, 0.78) 60%, var(--bg-primary) 100%);
}

.hero__bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  filter: grayscale(0.25) contrast(1.05) brightness(0.9);
  z-index: 1;
  animation: heroZoom 18s ease-out forwards;
}
@keyframes heroZoom {
  from { transform: scale(1.08); }
  to   { transform: scale(1); }
}
@media (prefers-reduced-motion: reduce) {
  .hero__bg-img { animation: none; transform: none; }
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(180deg, transparent 60%, var(--bg-primary) 100%);
  z-index: -1;
  pointer-events: none;
}

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

.hero__content {
  max-width: 900px;
}

.hero__title {
  margin-bottom: 1.5rem;
}

.hero__title-line {
  display: block;
  font-size: clamp(3rem, 10vw, 8rem);
  font-weight: 700;
  letter-spacing: var(--tracking-tight);
  line-height: 0.9;
}

.hero__title-line--accent {
  color: var(--color-orange);
  margin-left: 10vw;
}

.hero__subtitle {
  font-size: var(--text-lg);
  color: var(--color-metal-light);
  margin-bottom: 2rem;
  max-width: 500px;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 4rem;
}

.hero__stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-concrete);
}

.hero__stat {
  text-align: left;
}

.hero__stat-value {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-orange);
}

.hero__stat-value::after {
  content: '+';
}

.hero__stat-label {
  display: block;
  font-size: var(--text-sm);
  color: var(--color-metal-light);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.hero__scroll {
  position: absolute;
  bottom: 2rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: var(--text-xs);
  color: var(--color-metal);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.hero__scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(180deg, var(--color-orange) 0%, transparent 100%);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 1; transform: scaleY(1); }
  50% { opacity: 0.5; transform: scaleY(0.8); }
}

/* --- About --- */
.about__grid {
  display: grid;
  gap: 4rem;
}

.about__text {
  margin-bottom: 1.5rem;
  font-size: var(--text-lg);
}

.about__features {
  display: grid;
  gap: 2rem;
  margin-top: 3rem;
}

.feature {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.feature__icon {
  color: var(--color-orange);
  flex-shrink: 0;
}

.feature__title {
  font-size: var(--text-lg);
  margin-bottom: 0.25rem;
}

.feature__desc {
  font-size: var(--text-sm);
}

.about__visual {
  position: relative;
}

.about__image-wrapper {
  position: relative;
  background: var(--bg-concrete);
  aspect-ratio: 4/3;
  overflow: hidden;
}

.about__image-placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-metal);
  font-family: var(--font-display);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

.about__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
  display: block;
  transition: transform 0.6s ease;
  filter: contrast(1.05) saturate(0.9);
}
.about__image-wrapper:hover .about__image {
  transform: scale(1.04);
}
@media (prefers-reduced-motion: reduce) {
  .about__image { transition: none; }
  .about__image-wrapper:hover .about__image { transform: none; }
}

.about__image-accent {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 40%;
  height: 4px;
  background: var(--color-orange);
}

.about__badge {
  position: absolute;
  bottom: -2rem;
  right: -2rem;
  background: var(--color-orange);
  padding: 1.5rem;
  text-align: center;
}

.about__badge-number {
  display: block;
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-white);
}

.about__badge-text {
  display: block;
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
}

@media (min-width: 768px) {
  .about__grid {
    grid-template-columns: 1fr 1fr;
    align-items: center;
  }
  
  .about__features {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- Services --- */
.services__grid {
  display: grid;
  gap: 1px;
  background: var(--color-concrete);
  border: 1px solid var(--color-concrete);
}

.service-card {
  background: var(--bg-secondary);
  padding: 2rem;
  position: relative;
  transition: background var(--transition-base);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.service-card:hover {
  background: var(--bg-tertiary);
}

.service-card__header {
  display: flex;
  align-items: flex-start;
  gap: 1rem;
  margin-bottom: 0.5rem;
}

.service-card__number {
  font-family: var(--font-display);
  font-size: var(--text-4xl);
  font-weight: 700;
  color: var(--color-orange);
  flex-shrink: 0;
  line-height: 1;
}

.service-card__title {
  font-size: var(--text-xl);
  color: var(--color-white);
  margin: 0;
}

.service-card__desc {
  font-size: var(--text-sm);
  margin-bottom: 0.5rem;
}

.service-card__list {
  list-style: none;
  font-size: var(--text-sm);
}

.service-card__list li {
  padding-left: 1rem;
  position: relative;
  margin-bottom: 0.5rem;
  color: var(--color-metal-light);
}

.service-card__list li::before {
  content: '\25B8';
  position: absolute;
  left: 0;
  color: var(--color-orange);
}

.service-card--wide {
  grid-column: span 1;
}

@media (min-width: 768px) {
  .services__grid {
    grid-template-columns: repeat(3, 1fr);
  }
  
  .service-card--wide {
    grid-column: span 2;
  }
}

/* --- Calculator --- */
.calculator__wrapper {
  display: grid;
  gap: 2rem;
}

.calculator__desc {
  margin-bottom: 2rem;
  font-size: var(--text-lg);
}

.calculator__form {
  display: grid;
  gap: 1.5rem;
}

.form__group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.form__label {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  color: var(--color-metal-light);
}

.form__input,
.form__select,
.form__textarea {
  background: var(--bg-secondary);
  border: 1px solid var(--color-concrete);
  border-radius: var(--radius-none);
  padding: 1rem;
  color: var(--color-white);
  transition: border-color var(--transition-fast);
}

.form__input:focus,
.form__select:focus,
.form__textarea:focus {
  outline: none;
  border-color: var(--color-orange);
  box-shadow: 0 0 0 2px rgba(255, 107, 0, 0.2);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--color-metal);
}

.form__select {
  cursor: pointer;
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236b6b6b' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
  background-size: 1rem;
  padding-right: 3rem;
}

.form__textarea {
  resize: vertical;
  min-height: 100px;
}

.form__row {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 640px) {
  .form__row {
    grid-template-columns: 1fr 1fr;
  }
}

.form__radio-group,
.form__checkbox-group {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.form__radio,
.form__checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
}

.form__radio input,
.form__checkbox input {
  width: 18px;
  height: 18px;
  accent-color: var(--color-orange);
  cursor: pointer;
}

.form__radio-text,
.form__checkbox-text {
  font-size: var(--text-sm);
}

.form__file {
  border: 2px dashed var(--color-concrete);
  padding: 1rem;
  text-align: center;
  cursor: pointer;
  transition: border-color var(--transition-fast);
}

.form__file:hover {
  border-color: var(--color-orange);
}

.form__file-input {
  display: none;
}

.form__file-text {
  color: var(--color-metal-light);
  font-size: var(--text-sm);
}

/* Calculator Result */
.calculator__result {
  background: var(--bg-secondary);
  border: 1px solid var(--color-concrete);
  padding: 2rem;
  animation: slideIn var(--transition-base);
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result__header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 2rem;
}

.result__title {
  font-size: var(--text-xl);
}

.result__close {
  font-size: var(--text-2xl);
  color: var(--color-metal);
  transition: color var(--transition-fast);
}

.result__close:hover {
  color: var(--color-white);
}

.result__amount {
  text-align: center;
  margin-bottom: 1rem;
}

.result__value {
  font-family: var(--font-display);
  font-size: var(--text-5xl);
  font-weight: 700;
  color: var(--color-orange);
}

.result__currency {
  font-size: var(--text-2xl);
  color: var(--color-metal-light);
}

.result__note {
  text-align: center;
  font-size: var(--text-sm);
  color: var(--color-metal);
  margin-bottom: 2rem;
}

.result__actions {
  display: grid;
  gap: 1rem;
}

@media (min-width: 768px) {
  .calculator__wrapper {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
  
  .calculator__result {
    position: sticky;
    top: calc(var(--header-height) + 2rem);
  }
}

/* --- Projects --- */
.projects__filter {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
  margin-bottom: 2rem;
  justify-content: center;
}

.filter__btn {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: 0.5rem 1rem;
  border: 1px solid var(--color-concrete);
  color: var(--color-metal-light);
  transition: all var(--transition-fast);
}

.filter__btn:hover,
.filter__btn.active {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.projects__grid {
  display: grid;
  gap: 1px;
  background: var(--color-concrete);
  border: 1px solid var(--color-concrete);
}

.project-card {
  background: var(--bg-secondary);
  position: relative;
}

.project-card__image {
  position: relative;
  aspect-ratio: 16/10;
  background: var(--bg-concrete);
  overflow: hidden;
}

.project-card__image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-slow);
}

.project-card:hover .project-card__image img {
  transform: scale(1.1);
}

.project-card__placeholder {
  width: 100%;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-metal);
  font-family: var(--font-display);
  text-transform: uppercase;
}

.project-card__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition-base);
}

.project-card:hover .project-card__overlay {
  opacity: 1;
}

.project-card__btn {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  padding: 1rem 2rem;
  border: 2px solid var(--color-orange);
  color: var(--color-orange);
  transition: all var(--transition-fast);
}

.project-card__btn:hover {
  background: var(--color-orange);
  color: var(--color-white);
}

.project-card__content {
  padding: 1.5rem;
}

.project-card__title {
  font-size: var(--text-lg);
  margin-bottom: 0.5rem;
}

.project-card__location {
  font-size: var(--text-sm);
  color: var(--color-metal-light);
  margin-bottom: 1rem;
}

.project-card__specs {
  display: flex;
  gap: 1rem;
  font-size: var(--text-sm);
}

.project-card__spec {
  padding: 0.25rem 0.5rem;
  background: var(--bg-tertiary);
  border: 1px solid var(--color-concrete);
}

.projects__cta {
  text-align: center;
  margin-top: 3rem;
  padding: 3rem;
  background: var(--bg-secondary);
  border: 1px solid var(--color-concrete);
}

.projects__cta-text {
  margin-bottom: 1.5rem;
  font-size: var(--text-xl);
}

@media (min-width: 768px) {
  .projects__grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* --- Process --- */
.process__timeline {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.process__step {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 2rem;
  padding: 2rem 0;
  border-bottom: 1px solid var(--color-concrete);
}

.process__step-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-orange);
}

.process__step-title {
  font-size: var(--text-xl);
  margin-bottom: 0.5rem;
}

.process__step-desc {
  font-size: var(--text-sm);
}

.process__connector {
  display: none;
}

@media (min-width: 768px) {
  .process__timeline {
    flex-direction: row;
    justify-content: space-between;
  }
  
  .process__step {
    grid-template-columns: 1fr;
    text-align: center;
    border-bottom: none;
    border-right: 1px solid var(--color-concrete);
    padding: 2rem 1rem;
    flex: 1;
  }
  
  .process__step:last-child {
    border-right: none;
  }
  
  .process__connector {
    display: block;
    width: 100%;
    height: 1px;
    background: var(--color-concrete);
    align-self: center;
  }
}

/* --- Tender --- */
.tender__wrapper {
  display: grid;
  gap: 4rem;
}

.tender__desc {
  margin-bottom: 2rem;
  font-size: var(--text-lg);
}

.tender__features {
  list-style: none;
  display: grid;
  gap: 1rem;
}

.tender__features li {
  padding-left: 1.5rem;
  position: relative;
}

.tender__features li::before {
  content: '\2713';
  position: absolute;
  left: 0;
  color: var(--color-orange);
}

.tender__form {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 1024px) {
  .tender__wrapper {
    grid-template-columns: 1fr 1fr;
    align-items: start;
  }
}

/* --- Contacts --- */
.contacts__grid {
  display: grid;
  gap: 3rem;
  margin-bottom: 4rem;
}

.contact-item {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
}

.contact-item__icon {
  color: var(--color-orange);
  flex-shrink: 0;
}

.contact-item__title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: 0.25rem;
}

.contact-item__text {
  font-size: var(--text-base);
}

.contact-item__link {
  color: var(--color-white);
  transition: color var(--transition-fast);
}

.contact-item__link:hover {
  color: var(--color-orange);
}

.contacts__social {
  margin-top: 2rem;
}

.contacts__social-title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: 1rem;
}

.social__links {
  display: flex;
  gap: 1rem;
}

.social__link {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--color-concrete);
  color: var(--color-metal-light);
  transition: all var(--transition-fast);
}

.social__link:hover {
  border-color: var(--color-orange);
  color: var(--color-orange);
}

.contacts__map {
  min-height: 400px;
  background: var(--bg-concrete);
}

#map {
  width: 100%;
  height: 100%;
  min-height: 400px;
  filter: grayscale(100%) invert(90%) hue-rotate(180deg);
}

#map .leaflet-popup-content-wrapper,
#map .leaflet-popup-tip {
  background: var(--bg-secondary);
  color: var(--color-white);
}

#map .leaflet-popup-content {
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.contacts__form-wrapper {
  background: var(--bg-secondary);
  padding: 3rem;
  border: 1px solid var(--color-concrete);
}

.contacts__form-title {
  font-size: var(--text-2xl);
  margin-bottom: 2rem;
}

.contacts__form {
  display: grid;
  gap: 1.5rem;
}

@media (min-width: 768px) {
  .contacts__grid {
    grid-template-columns: 1fr 1fr;
  }
}

/* --- Footer --- */
.footer {
  background: var(--bg-secondary);
  border-top: 1px solid var(--color-concrete);
  padding: 4rem 0 2rem;
}

.footer__grid {
  display: grid;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer__logo {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  letter-spacing: var(--tracking-widest);
  margin-bottom: 1rem;
}

.footer__desc {
  font-size: var(--text-sm);
  max-width: 300px;
}

.footer__title {
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: var(--tracking-wider);
  margin-bottom: 1.5rem;
  color: var(--color-white);
}

.footer__links,
.footer__contacts {
  list-style: none;
  display: grid;
  gap: 0.75rem;
  font-size: var(--text-sm);
  color: var(--color-metal-light);
}

.footer__links li:hover {
  color: var(--color-orange);
}

.footer__bottom {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  padding-top: 2rem;
  border-top: 1px solid var(--color-concrete);
  font-size: var(--text-sm);
  color: var(--color-metal);
}

.footer__legal {
  display: flex;
  gap: 2rem;
}

.footer__legal-link {
  color: var(--color-metal);
}

.footer__legal-link:hover {
  color: var(--color-orange);
}

@media (min-width: 768px) {
  .footer__grid {
    grid-template-columns: 2fr 1fr 1fr 1fr;
  }
  
  .footer__bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

/* --- Modal --- */
.modal {
  position: fixed;
  inset: 0;
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  visibility: hidden;
  opacity: 0;
  transition: all var(--transition-base);
}

.modal--active {
  visibility: visible;
  opacity: 1;
}

.modal__overlay {
  position: absolute;
  inset: 0;
  background: rgba(0, 0, 0, 0.8);
}

.modal__content {
  position: relative;
  background: var(--bg-secondary);
  padding: 3rem;
  max-width: 500px;
  width: 100%;
  border: 1px solid var(--color-concrete);
  transform: translateY(20px);
  transition: transform var(--transition-base);
}

.modal--active .modal__content {
  transform: translateY(0);
}

.modal__close {
  position: absolute;
  top: 1rem;
  right: 1rem;
  font-size: var(--text-2xl);
  color: var(--color-metal);
  transition: color var(--transition-fast);
}

.modal__close:hover {
  color: var(--color-white);
}

.modal__title {
  font-size: var(--text-2xl);
  margin-bottom: 0.5rem;
}

.modal__desc {
  margin-bottom: 2rem;
}

.modal__form {
  display: grid;
  gap: 1.5rem;
}

/* --- Sticky CTA --- */
.sticky-cta {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  width: 56px;
  height: 56px;
  background: var(--color-orange);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-white);
  box-shadow: var(--shadow-lg);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition-base);
}

.sticky-cta--visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sticky-cta:hover {
  background: var(--color-orange-hover);
  transform: translateY(0) scale(1.1);
}

/* --- Animations --- */
[data-animate] {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-animate].animated {
  opacity: 1;
  transform: translateY(0);
}

/* --- Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
  
  html {
    scroll-behavior: auto;
  }
}

/* --- Focus Visible --- */
:focus-visible {
  outline: var(--focus-ring);
  outline-offset: var(--focus-offset);
}

/* --- Print --- */
@media print {
  .header,
  .preloader,
  .sticky-cta,
  .modal {
    display: none !important;
  }
  
  body {
    background: white;
    color: black;
  }
  
  .section {
    page-break-inside: avoid;
  }
}