/* ================================================
   КрышеСтрой - Ремонт плоской кровли
   Индустриальный дизайн с прямыми углами
   ================================================ */

/* CSS Variables */
:root {
    --color-primary: #1a1a2e;
    --color-secondary: #16213e;
    --color-accent: #e94560;
    --color-accent-hover: #ff6b6b;
    --color-light: #f8f9fa;
    --color-white: #ffffff;
    --color-gray-100: #f1f3f5;
    --color-gray-200: #e9ecef;
    --color-gray-300: #dee2e6;
    --color-gray-400: #ced4da;
    --color-gray-500: #adb5bd;
    --color-gray-600: #6c757d;
    --color-gray-700: #495057;
    --color-gray-800: #343a40;
    --color-gray-900: #212529;
    --color-success: #2ecc71;
    --color-warning: #f39c12;
    --color-danger: #e74c3c;
    
    --font-display: 'Unbounded', sans-serif;
    --font-body: 'Onest', sans-serif;
    
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.15);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.2);
    --shadow-xl: 0 12px 48px rgba(0,0,0,0.25);
    
    --transition: all 0.3s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-gray-800);
    background: var(--color-light);
    -webkit-font-smoothing: antialiased;
}

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

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

ul, ol {
    list-style: none;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 600;
    line-height: 1.2;
}

.section-title {
    font-size: clamp(28px, 4vw, 42px);
    color: var(--color-primary);
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--color-accent);
}

.section-title--light {
    color: var(--color-white);
}

.section-title--light::after {
    background: var(--color-white);
}

.section-intro {
    font-size: 18px;
    color: var(--color-gray-600);
    max-width: 800px;
    margin-bottom: 48px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px 32px;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    cursor: pointer;
    transition: var(--transition);
}

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

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

.btn--secondary {
    background: var(--color-white);
    color: var(--color-primary);
    border: 2px solid var(--color-primary);
}

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

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

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

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

/* ================================================
   HEADER
   ================================================ */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--color-white);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.header__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 80px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 20px;
    color: var(--color-primary);
}

.logo__icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: var(--color-accent);
    color: var(--color-white);
    font-size: 18px;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav__link {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-700);
    position: relative;
}

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

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

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

.header__contacts {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
}

.header__phone {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--color-primary);
}

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

.header__schedule {
    font-size: 12px;
    color: var(--color-gray-500);
}

.burger {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: 8px;
    background: none;
    border: none;
    cursor: pointer;
}

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

/* ================================================
   HERO SECTION
   ================================================ */
.hero {
    position: relative;
    padding: 160px 0 80px;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    overflow: hidden;
}

.hero__bg-pattern {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: 
        linear-gradient(90deg, rgba(255,255,255,0.03) 1px, transparent 1px),
        linear-gradient(rgba(255,255,255,0.03) 1px, transparent 1px);
    background-size: 50px 50px;
    opacity: 0.5;
}

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

.hero__content {
    max-width: 700px;
    margin-bottom: 64px;
}

.hero__badge {
    display: inline-block;
    padding: 8px 16px;
    background: rgba(233, 69, 96, 0.2);
    color: var(--color-accent);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 24px;
    border-left: 3px solid var(--color-accent);
}

.hero__title {
    font-size: clamp(36px, 6vw, 64px);
    color: var(--color-white);
    margin-bottom: 24px;
    line-height: 1.1;
}

.hero__subtitle {
    font-size: 20px;
    color: rgba(255,255,255,0.8);
    margin-bottom: 40px;
    line-height: 1.7;
}

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

.hero__stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.stat {
    padding: 32px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    transition: var(--transition);
}

.stat:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-4px);
}

.stat--highlight {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.stat__number {
    display: block;
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 700;
    color: var(--color-white);
    margin-bottom: 8px;
}

.stat__label {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
}

.stat--highlight .stat__label {
    color: var(--color-white);
}

/* ================================================
   PROBLEMS SECTION
   ================================================ */
.problems {
    padding: 100px 0;
    background: var(--color-white);
}

.problems__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 48px;
}

.problem-card {
    padding: 32px;
    background: var(--color-light);
    border: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.problem-card:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.problem-card__icon {
    font-size: 32px;
    margin-bottom: 16px;
}

.problem-card__title {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.problem-card__consequence {
    font-size: 14px;
    color: var(--color-gray-600);
    margin-bottom: 16px;
}

.problem-card__solution {
    font-size: 14px;
    padding-top: 16px;
    border-top: 1px solid var(--color-gray-200);
    color: var(--color-gray-700);
}

.problem-card__solution-label {
    color: var(--color-accent);
    font-weight: 600;
}

.problems__alert {
    display: flex;
    align-items: flex-start;
    gap: 16px;
    padding: 24px;
    background: rgba(233, 69, 96, 0.1);
    border-left: 4px solid var(--color-accent);
}

.problems__alert-icon {
    font-size: 24px;
    flex-shrink: 0;
}

.problems__alert p {
    color: var(--color-gray-700);
}

/* ================================================
   SERVICES SECTION
   ================================================ */
.services {
    padding: 100px 0;
    background: var(--color-primary);
}

.services__grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.service-card {
    display: flex;
    flex-direction: column;
    background: var(--color-secondary);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.service-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.service-card--featured {
    background: linear-gradient(135deg, var(--color-accent) 0%, #ff6b6b 100%);
    border-color: var(--color-accent);
}

.service-card__header {
    padding: 24px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.service-card__tag {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 12px;
}

.service-card--featured .service-card__tag {
    background: rgba(255,255,255,0.2);
}

.service-card__title {
    font-size: 20px;
    color: var(--color-white);
}

.service-card__desc {
    padding: 24px;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    flex-grow: 0;
}

.service-card--featured .service-card__desc {
    color: rgba(255,255,255,0.9);
}

.service-card__list {
    padding: 0 24px 24px;
    flex-grow: 1;
}

.service-card__list li {
    position: relative;
    padding-left: 20px;
    margin-bottom: 12px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

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

.service-card--featured .service-card__list li {
    color: rgba(255,255,255,0.9);
}

.service-card--featured .service-card__list li::before {
    color: var(--color-white);
}

.service-card__footer {
    padding: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    margin-top: auto;
}

.service-card__time {
    font-size: 14px;
    color: rgba(255,255,255,0.5);
}

/* ================================================
   MATERIALS SECTION
   ================================================ */
.materials {
    padding: 100px 0;
    background: var(--color-white);
}

.materials__tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 32px;
}

.materials__tab {
    padding: 16px 32px;
    background: var(--color-gray-100);
    border: none;
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-600);
    cursor: pointer;
    transition: var(--transition);
}

.materials__tab:hover {
    background: var(--color-gray-200);
}

.materials__tab.active {
    background: var(--color-primary);
    color: var(--color-white);
}

.materials__content {
    display: none;
}

.materials__content.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.material-table {
    background: var(--color-light);
    border: 1px solid var(--color-gray-200);
}

.material-table__header {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr 2fr;
    gap: 24px;
    padding: 20px 24px;
    background: var(--color-primary);
    font-family: var(--font-display);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-white);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.material-table__row {
    display: grid;
    grid-template-columns: 2fr 1fr 2fr 2fr;
    gap: 24px;
    padding: 20px 24px;
    font-size: 14px;
    border-bottom: 1px solid var(--color-gray-200);
    transition: var(--transition);
}

.material-table__row:last-child {
    border-bottom: none;
}

.material-table__row:hover {
    background: var(--color-white);
}

.material-table__row--recommended {
    background: rgba(46, 204, 113, 0.1);
}

.material-table__row--warning {
    background: rgba(231, 76, 60, 0.05);
}

.material-table__name {
    font-weight: 600;
    color: var(--color-primary);
}

.material-table__years {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-accent);
}

.material-table__badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-success);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
}

.material-table__badge--warning {
    background: var(--color-danger);
}

/* ================================================
   PRICES SECTION
   ================================================ */
.prices {
    padding: 100px 0;
    background: var(--color-light);
}

.prices__packages {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 64px;
}

.package {
    position: relative;
    display: flex;
    flex-direction: column;
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    padding: 40px 32px;
    transition: var(--transition);
}

.package:hover {
    border-color: var(--color-gray-400);
    box-shadow: var(--shadow-md);
}

.package--featured {
    border-color: var(--color-accent);
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

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

.package__badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 8px 24px;
    background: var(--color-accent);
    color: var(--color-white);
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.package__header {
    text-align: center;
    margin-bottom: 24px;
}

.package__title {
    font-size: 24px;
    color: var(--color-primary);
    margin-bottom: 8px;
}

.package__type {
    font-size: 14px;
    color: var(--color-gray-500);
}

.package__price {
    text-align: center;
    padding: 24px 0;
    margin-bottom: 24px;
    border-top: 1px solid var(--color-gray-200);
    border-bottom: 1px solid var(--color-gray-200);
}

.package__from {
    display: block;
    font-size: 14px;
    color: var(--color-gray-500);
    margin-bottom: 4px;
}

.package__amount {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--color-primary);
}

.package--featured .package__amount {
    color: var(--color-accent);
}

.package__unit {
    font-size: 14px;
    color: var(--color-gray-600);
}

.package__features {
    flex-grow: 1;
    margin-bottom: 32px;
}

.package__features li {
    position: relative;
    padding: 12px 0 12px 28px;
    border-bottom: 1px solid var(--color-gray-100);
    font-size: 14px;
    color: var(--color-gray-700);
}

.package__features li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-success);
    font-weight: 700;
}

.package .btn {
    width: 100%;
}

/* Price Toggle & Table */
.prices__toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 20px;
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-primary);
    cursor: pointer;
    transition: var(--transition);
}

.prices__toggle:hover {
    border-color: var(--color-primary);
}

.prices__toggle-icon {
    font-size: 20px;
    transition: var(--transition);
}

.prices__toggle.active .prices__toggle-icon {
    transform: rotate(180deg);
}

.prices__table-container {
    display: none;
    padding: 32px;
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    border-top: none;
}

.prices__table-container.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.prices__table-title {
    font-size: 18px;
    color: var(--color-primary);
    margin: 32px 0 16px;
    padding-bottom: 8px;
    border-bottom: 2px solid var(--color-accent);
}

.prices__table-title:first-child {
    margin-top: 0;
}

.price-table__row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-gray-100);
    font-size: 14px;
}

.price-table__row:last-child {
    border-bottom: none;
}

.price-table__price {
    font-family: var(--font-display);
    font-weight: 600;
    color: var(--color-primary);
    white-space: nowrap;
}

.price-table__price--free {
    color: var(--color-success);
}

/* ================================================
   STEPS SECTION
   ================================================ */
.steps {
    padding: 100px 0;
    background: var(--color-secondary);
}

.steps__timeline {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.step {
    position: relative;
    padding: 32px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.step:hover {
    background: rgba(255,255,255,0.08);
    transform: translateY(-4px);
}

.step__number {
    position: absolute;
    top: -16px;
    left: 32px;
    padding: 8px 16px;
    background: var(--color-accent);
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 700;
    color: var(--color-white);
}

.step__content {
    padding-top: 16px;
}

.step__title {
    font-size: 18px;
    color: var(--color-white);
    margin-bottom: 12px;
}

.step__desc {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 16px;
    line-height: 1.7;
}

.step__time {
    display: inline-block;
    padding: 4px 12px;
    background: rgba(255,255,255,0.1);
    font-size: 12px;
    color: var(--color-accent);
}

/* ================================================
   ADVANTAGES SECTION
   ================================================ */
.advantages {
    padding: 100px 0;
    background: var(--color-white);
}

.advantages__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.advantage {
    padding: 40px;
    background: var(--color-light);
    border-bottom: 4px solid transparent;
    transition: var(--transition);
}

.advantage:hover {
    border-color: var(--color-accent);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.advantage__icon {
    font-size: 40px;
    margin-bottom: 20px;
}

.advantage__title {
    font-size: 18px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.advantage__desc {
    font-size: 14px;
    color: var(--color-gray-600);
    line-height: 1.7;
}

/* ================================================
   PORTFOLIO SECTION
   ================================================ */
.portfolio {
    padding: 100px 0;
    background: var(--color-primary);
}

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

.case-card {
    background: var(--color-secondary);
    border: 1px solid rgba(255,255,255,0.1);
    transition: var(--transition);
}

.case-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.case-card__header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 24px;
    background: rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.case-card__type {
    font-family: var(--font-display);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-white);
}

.case-card__location {
    font-size: 12px;
    color: rgba(255,255,255,0.5);
}

.case-card__body {
    padding: 24px;
}

.case-card__stat {
    margin-bottom: 20px;
}

.case-card__stat-value {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--color-accent);
}

.case-card__stat-label {
    display: block;
    font-size: 12px;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.case-card__problem,
.case-card__solution {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 12px;
}

.case-card__label {
    display: block;
    font-size: 11px;
    font-weight: 600;
    color: rgba(255,255,255,0.5);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 4px;
}

.case-card__footer {
    padding: 20px 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.case-card__meta {
    display: flex;
    gap: 24px;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
}

/* ================================================
   GEOGRAPHY SECTION
   ================================================ */
.geography {
    padding: 100px 0;
    background: var(--color-light);
}

.geography__content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
    align-items: center;
}

.geography__map {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.geography__map-inner {
    position: relative;
    width: 100%;
    max-width: 400px;
    aspect-ratio: 1;
}

.geography__dot {
    position: absolute;
    width: 20px;
    height: 20px;
    background: var(--color-accent);
}

.geography__dot--center {
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    z-index: 3;
}

.geography__radius {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    border: 2px dashed var(--color-gray-400);
}

.geography__radius--50 {
    width: 50%;
    height: 50%;
}

.geography__radius--150 {
    width: 100%;
    height: 100%;
}

.geography__label {
    position: absolute;
    font-family: var(--font-display);
    font-size: 12px;
    font-weight: 600;
    color: var(--color-gray-600);
}

.geography__label--center {
    top: 50%;
    left: 50%;
    transform: translate(24px, -50%);
    color: var(--color-accent);
}

.geography__label--50 {
    top: 25%;
    right: 25%;
}

.geography__label--150 {
    top: 0;
    right: 0;
}

.geography__info {
    display: flex;
    flex-direction: column;
    gap: 32px;
}

.geography__block {
    padding: 32px;
    background: var(--color-white);
    border-left: 4px solid var(--color-accent);
}

.geography__block h3 {
    font-size: 20px;
    color: var(--color-primary);
    margin-bottom: 12px;
}

.geography__block p {
    font-size: 14px;
    color: var(--color-gray-600);
    margin-bottom: 16px;
    line-height: 1.7;
}

.geography__badge {
    display: inline-block;
    padding: 8px 16px;
    background: var(--color-primary);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
}

/* ================================================
   FAQ SECTION
   ================================================ */
.faq {
    padding: 100px 0;
    background: var(--color-secondary);
}

.faq__list {
    max-width: 900px;
    margin: 0 auto;
}

.faq-item {
    margin-bottom: 8px;
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.1);
}

.faq-item__question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    padding: 24px;
    background: none;
    border: none;
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 500;
    color: var(--color-white);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
}

.faq-item__question:hover {
    background: rgba(255,255,255,0.05);
}

.faq-item__icon {
    font-size: 24px;
    color: var(--color-accent);
    transition: var(--transition);
}

.faq-item.active .faq-item__icon {
    transform: rotate(45deg);
}

.faq-item__answer {
    display: none;
    padding: 0 24px 24px;
}

.faq-item.active .faq-item__answer {
    display: block;
    animation: fadeIn 0.3s ease;
}

.faq-item__answer p {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    line-height: 1.8;
}

/* ================================================
   CONTACT SECTION
   ================================================ */
.contact {
    padding: 100px 0;
    background: var(--color-white);
}

.contact__inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 64px;
}

.contact__title {
    font-size: clamp(28px, 4vw, 36px);
    color: var(--color-primary);
    margin-bottom: 16px;
}

.contact__subtitle {
    font-size: 18px;
    color: var(--color-gray-600);
    margin-bottom: 40px;
}

.contact__features {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact__feature {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 16px;
    color: var(--color-gray-700);
}

.contact__feature-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    background: var(--color-success);
    color: var(--color-white);
    font-size: 14px;
}

.contact__form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    padding: 48px;
    background: var(--color-light);
    border: 2px solid var(--color-gray-200);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.form-group--full {
    grid-column: 1 / -1;
}

.form-group label {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-gray-700);
}

.form-group input,
.form-group select,
.form-group textarea {
    padding: 16px;
    background: var(--color-white);
    border: 2px solid var(--color-gray-200);
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--color-gray-800);
    transition: var(--transition);
}

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

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

.checkbox {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    cursor: pointer;
}

.checkbox input {
    display: none;
}

.checkbox__mark {
    flex-shrink: 0;
    width: 20px;
    height: 20px;
    background: var(--color-white);
    border: 2px solid var(--color-gray-300);
    position: relative;
    transition: var(--transition);
}

.checkbox input:checked + .checkbox__mark {
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.checkbox input:checked + .checkbox__mark::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--color-white);
    font-size: 12px;
}

.checkbox__text {
    font-size: 14px;
    color: var(--color-gray-600);
    line-height: 1.5;
}

.contact__form .btn {
    grid-column: 1 / -1;
    justify-self: start;
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
    padding: 80px 0 0;
    background: var(--color-primary);
}

.footer__grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
    padding-bottom: 48px;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.logo--footer {
    margin-bottom: 20px;
}

.logo--footer .logo__text {
    color: var(--color-white);
}

.footer__desc {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    margin-bottom: 24px;
}

.footer__social {
    display: flex;
    gap: 8px;
}

.footer__social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    color: var(--color-white);
    font-size: 12px;
    font-weight: 600;
    transition: var(--transition);
}

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

.footer__contacts h4,
.footer__schedule h4,
.footer__legal h4 {
    font-size: 14px;
    color: var(--color-white);
    margin-bottom: 20px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.footer__phone {
    display: block;
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--color-white);
    margin-bottom: 12px;
}

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

.footer__email {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-bottom: 16px;
}

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

.footer__address {
    font-size: 14px;
    font-style: normal;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
}

.footer__schedule p,
.footer__legal p {
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    line-height: 1.7;
    margin-bottom: 12px;
}

.footer__legal a {
    display: block;
    font-size: 14px;
    color: rgba(255,255,255,0.6);
    margin-bottom: 8px;
}

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

.footer__bottom {
    padding: 24px 0;
    text-align: center;
}

.footer__bottom p {
    font-size: 14px;
    color: rgba(255,255,255,0.4);
}

/* ================================================
   MOBILE NAVIGATION
   ================================================ */
.mobile-nav {
    position: fixed;
    top: 80px;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--color-white);
    padding: 24px;
    transform: translateX(100%);
    transition: var(--transition);
    z-index: 999;
    overflow-y: auto;
}

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

.mobile-nav .nav {
    flex-direction: column;
    gap: 0;
}

.mobile-nav .nav__link {
    display: block;
    padding: 16px 0;
    font-size: 18px;
    border-bottom: 1px solid var(--color-gray-200);
}

.mobile-nav .header__contacts {
    margin-top: 32px;
    align-items: flex-start;
}

.mobile-nav .header__phone {
    font-size: 24px;
}

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 1200px) {
    .services__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .portfolio__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 992px) {
    .nav {
        display: none;
    }
    
    .header__contacts {
        display: none;
    }
    
    .burger {
        display: flex;
    }
    
    .hero__stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .problems__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .steps__timeline {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .advantages__grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .prices__packages {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }
    
    .package--featured {
        transform: none;
    }
    
    .geography__content {
        grid-template-columns: 1fr;
    }
    
    .contact__inner {
        grid-template-columns: 1fr;
    }
    
    .footer__grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 16px;
    }
    
    .hero {
        padding: 120px 0 60px;
    }
    
    .hero__stats {
        grid-template-columns: 1fr;
        gap: 16px;
    }
    
    .stat {
        padding: 24px;
    }
    
    .problems__grid,
    .services__grid,
    .steps__timeline,
    .advantages__grid,
    .portfolio__grid {
        grid-template-columns: 1fr;
    }
    
    .material-table__header,
    .material-table__row {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    
    .material-table__header {
        display: none;
    }
    
    .material-table__row {
        padding: 20px;
        position: relative;
    }
    
    .contact__form {
        grid-template-columns: 1fr;
        padding: 24px;
    }
    
    .footer__grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .section-title {
        font-size: 24px;
    }
}

@media (max-width: 480px) {
    .hero__buttons {
        flex-direction: column;
    }
    
    .hero__buttons .btn {
        width: 100%;
    }
    
    .btn--large {
        padding: 16px 32px;
    }
}

/* ================================================
   ANIMATIONS
   ================================================ */
@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-on-scroll {
    opacity: 0;
}

.animate-on-scroll.visible {
    animation: slideUp 0.6s ease forwards;
}