/* ===========================
   Основные переменные и сброс
   =========================== */

:root {
    /* Цветовая палитра бренда */
    --wood-light: #A0826D;
    --wood-dark: #8B7355;
    --graphite: #2C2C2C;
    --tech-blue: #4A90E2;
    --white: #FFFFFF;
    --light-gray: #F5F5F5;
    --medium-gray: #E0E0E0;
    --dark-gray: #666666;
    --text-dark: #1A1A1A;
    --text-light: #666666;
    
    /* Типографика */
    --font-primary: 'Inter', sans-serif;
    --font-display: 'Playfair Display', serif;
    
    /* Отступы */
    --section-padding: 100px;
    --container-padding: 20px;
    
    /* Переходы */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--text-dark);
    line-height: 1.6;
    overflow-x: hidden;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

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

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

ul {
    list-style: none;
}

/* ===========================
   Кнопки
   =========================== */

.btn-primary,
.btn-secondary,
.btn-outline {
    display: inline-block;
    padding: 14px 32px;
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition-medium);
    cursor: pointer;
    border: 2px solid transparent;
    text-align: center;
}

.btn-primary {
    background: var(--tech-blue);
    color: var(--white);
    border-color: var(--tech-blue);
}

.btn-primary:hover {
    background: #3A7BC8;
    border-color: #3A7BC8;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--white);
    border-color: var(--white);
}

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

.btn-outline {
    background: transparent;
    color: var(--tech-blue);
    border-color: var(--tech-blue);
}

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

.btn-large {
    padding: 18px 40px;
    font-size: 18px;
}

/* ===========================
   Навигация
   =========================== */

.navbar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    background: var(--white);
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.1);
    z-index: 1000;
    transition: var(--transition-medium);
}

.navbar.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.15);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 0;
}

.logo {
    display: flex;
    flex-direction: column;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 32px;
    font-weight: 700;
    color: var(--graphite);
    line-height: 1;
}

.logo-subtitle {
    font-size: 11px;
    color: var(--wood-dark);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-top: 2px;
}

.nav-links {
    display: flex;
    gap: 35px;
}

.nav-link {
    font-weight: 500;
    color: var(--graphite);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--tech-blue);
    transition: var(--transition-medium);
}

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

.nav-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
}

.burger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
}

.burger span {
    width: 30px;
    height: 3px;
    background: var(--graphite);
    border-radius: 3px;
    transition: var(--transition-medium);
}

/* ===========================
   Hero секция
   =========================== */

.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    overflow: hidden;
}

.hero-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, var(--graphite) 0%, var(--wood-dark) 100%);
    z-index: 1;
}

.hero-background::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: url('../images/house-terrace.jpg') center/cover no-repeat;
    opacity: 0.2;
}

.hero-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(44, 44, 44, 0.9) 0%, rgba(139, 115, 85, 0.7) 100%);
    z-index: 2;
}

.hero-content {
    position: relative;
    z-index: 3;
    text-align: center;
    max-width: 900px;
    padding: 150px 20px 50px;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 64px;
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 25px;
    animation: fadeInUp 1s ease;
}

.hero-accent {
    color: var(--tech-blue);
}

.hero-subtitle {
    font-size: 22px;
    line-height: 1.6;
    margin-bottom: 50px;
    opacity: 0.9;
    animation: fadeInUp 1s ease 0.2s backwards;
}

.hero-features {
    display: flex;
    justify-content: center;
    gap: 40px;
    margin-bottom: 50px;
    animation: fadeInUp 1s ease 0.4s backwards;
}

.hero-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.hero-feature i {
    font-size: 32px;
    color: var(--tech-blue);
}

.hero-feature span {
    font-size: 16px;
}

.hero-cta {
    display: flex;
    gap: 20px;
    justify-content: center;
    animation: fadeInUp 1s ease 0.6s backwards;
}

.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 3;
    animation: bounce 2s infinite;
}

.mouse {
    width: 30px;
    height: 50px;
    border: 2px solid var(--white);
    border-radius: 15px;
    position: relative;
}

.mouse::before {
    content: '';
    width: 4px;
    height: 10px;
    background: var(--white);
    position: absolute;
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes bounce {
    0%, 20%, 50%, 80%, 100% {
        transform: translateX(-50%) translateY(0);
    }
    40% {
        transform: translateX(-50%) translateY(-10px);
    }
    60% {
        transform: translateX(-50%) translateY(-5px);
    }
}

@keyframes scroll {
    0% {
        opacity: 1;
        top: 10px;
    }
    100% {
        opacity: 0;
        top: 30px;
    }
}

/* ===========================
   Секции
   =========================== */

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

.section-header {
    margin-bottom: 60px;
}

.section-header.centered {
    text-align: center;
}

.section-label {
    display: inline-block;
    font-size: 14px;
    font-weight: 600;
    color: var(--tech-blue);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 15px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--graphite);
    margin-bottom: 20px;
    line-height: 1.2;
}

.section-description {
    font-size: 18px;
    color: var(--text-light);
    max-width: 700px;
    margin: 0 auto;
}

/* ===========================
   О компании
   =========================== */

.about {
    background: var(--light-gray);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-text {
    font-size: 17px;
    line-height: 1.8;
}

.about-text .lead {
    font-size: 20px;
    margin-bottom: 25px;
    color: var(--graphite);
}

.about-text p {
    margin-bottom: 20px;
    color: var(--text-light);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 40px;
}

.stat {
    text-align: center;
}

.stat-value {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    color: var(--tech-blue);
    line-height: 1;
    margin-bottom: 10px;
}

.stat-label {
    font-size: 16px;
    color: var(--text-light);
}

.about-image {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.15);
}

.about-image img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

.about-badge {
    position: absolute;
    bottom: 30px;
    left: 30px;
    background: var(--white);
    padding: 20px 30px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 15px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.about-badge i {
    font-size: 32px;
    color: var(--tech-blue);
}

.about-badge span {
    font-weight: 600;
    color: var(--graphite);
}

/* ===========================
   Калькуляторы
   =========================== */

.calculators {
    background: var(--white);
    position: relative;
}

.calculators::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 200px;
    background: linear-gradient(180deg, var(--light-gray) 0%, transparent 100%);
    pointer-events: none;
}

.calculators-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.calculator-card {
    background: var(--white);
    padding: 40px 30px;
    border-radius: 16px;
    border: 2px solid var(--medium-gray);
    transition: var(--transition-medium);
    position: relative;
    display: flex;
    flex-direction: column;
}

.calculator-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--tech-blue);
}

.calculator-card.highlighted {
    background: linear-gradient(135deg, var(--tech-blue) 0%, #6BA3E8 100%);
    color: var(--white);
    border-color: var(--tech-blue);
}

.calculator-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.calculator-icon {
    width: 80px;
    height: 80px;
    background: var(--light-gray);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
    transition: var(--transition-medium);
}

.calculator-card.highlighted .calculator-icon {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
}

.calculator-card:hover .calculator-icon {
    transform: scale(1.1);
}

.calculator-icon i {
    font-size: 36px;
    color: var(--tech-blue);
}

.calculator-card.highlighted .calculator-icon i {
    color: var(--white);
}

.calculator-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--graphite);
}

.calculator-card.highlighted .calculator-title {
    color: var(--white);
}

.calculator-description {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 25px;
    color: var(--text-light);
    flex-grow: 1;
}

.calculator-card.highlighted .calculator-description {
    color: rgba(255, 255, 255, 0.9);
}

.calculator-features {
    margin-bottom: 30px;
}

.calculator-features li {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-light);
}

.calculator-card.highlighted .calculator-features li {
    color: rgba(255, 255, 255, 0.9);
}

.calculator-features i {
    color: var(--tech-blue);
    font-size: 14px;
    flex-shrink: 0;
}

.calculator-card.highlighted .calculator-features i {
    color: var(--white);
}

.btn-calculator {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 28px;
    background: var(--tech-blue);
    color: var(--white);
    border-radius: 8px;
    font-weight: 600;
    font-size: 16px;
    transition: var(--transition-medium);
    text-decoration: none;
    border: 2px solid var(--tech-blue);
}

.btn-calculator:hover {
    background: #3A7BC8;
    border-color: #3A7BC8;
    transform: translateY(-2px);
    box-shadow: 0 8px 20px rgba(74, 144, 226, 0.3);
}

.calculator-card.highlighted .btn-calculator {
    background: var(--white);
    color: var(--tech-blue);
    border-color: var(--white);
}

.calculator-card.highlighted .btn-calculator:hover {
    background: var(--light-gray);
    border-color: var(--light-gray);
}

.calculators-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.info-box {
    display: flex;
    gap: 20px;
    padding: 30px;
    background: var(--light-gray);
    border-radius: 16px;
    border-left: 4px solid var(--tech-blue);
}

.info-box i {
    font-size: 32px;
    color: var(--tech-blue);
    flex-shrink: 0;
    margin-top: 5px;
}

.info-text h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--graphite);
    margin-bottom: 10px;
}

.info-text p {
    font-size: 15px;
    line-height: 1.6;
    color: var(--text-light);
}

.info-text a {
    color: var(--tech-blue);
    font-weight: 600;
    text-decoration: none;
}

.info-text a:hover {
    text-decoration: underline;
}

/* ===========================
   Услуги
   =========================== */

.services {
    background: var(--white);
}

.services-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: var(--light-gray);
    padding: 40px 30px;
    border-radius: 16px;
    position: relative;
    transition: var(--transition-medium);
    border: 2px solid transparent;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--tech-blue);
}

.service-card.featured {
    background: var(--graphite);
    color: var(--white);
}

.service-badge {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--tech-blue);
    color: var(--white);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
}

.service-badge.new {
    background: var(--wood-dark);
}

.service-icon {
    width: 70px;
    height: 70px;
    background: var(--white);
    border-radius: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 25px;
}

.service-card.featured .service-icon {
    background: var(--tech-blue);
}

.service-icon i {
    font-size: 32px;
    color: var(--tech-blue);
}

.service-card.featured .service-icon i {
    color: var(--white);
}

.service-title {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--graphite);
}

.service-card.featured .service-title {
    color: var(--white);
}

.service-description {
    font-size: 16px;
    line-height: 1.6;
    margin-bottom: 25px;
    color: var(--text-light);
}

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

.service-features {
    margin-bottom: 30px;
}

.service-features li {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 12px;
    font-size: 15px;
    color: var(--text-light);
}

.service-card.featured .service-features li {
    color: rgba(255, 255, 255, 0.85);
}

.service-features i {
    color: var(--tech-blue);
    margin-top: 3px;
    flex-shrink: 0;
}

.service-card.featured .service-features i {
    color: var(--tech-blue);
}

/* ===========================
   Архитектурный квиз
   =========================== */

.quiz-section {
    position: relative;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    padding: 100px 0;
    overflow: hidden;
}

.quiz-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 50%, rgba(74, 144, 226, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(139, 115, 85, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.quiz-content {
    position: relative;
    z-index: 2;
    text-align: center;
    max-width: 900px;
    margin: 0 auto;
    color: var(--white);
}

.quiz-icon {
    width: 100px;
    height: 100px;
    background: linear-gradient(135deg, var(--tech-blue) 0%, #6BA3E8 100%);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 30px;
    box-shadow: 0 10px 40px rgba(74, 144, 226, 0.4);
    animation: pulse 2s infinite;
}

.quiz-icon i {
    font-size: 48px;
    color: var(--white);
}

@keyframes pulse {
    0%, 100% {
        transform: scale(1);
        box-shadow: 0 10px 40px rgba(74, 144, 226, 0.4);
    }
    50% {
        transform: scale(1.05);
        box-shadow: 0 15px 60px rgba(74, 144, 226, 0.6);
    }
}

.quiz-title {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    margin-bottom: 25px;
    line-height: 1.2;
    background: linear-gradient(135deg, #ffffff 0%, #4A90E2 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.quiz-description {
    font-size: 20px;
    line-height: 1.6;
    margin-bottom: 50px;
    opacity: 0.9;
    max-width: 700px;
    margin-left: auto;
    margin-right: auto;
}

.quiz-features {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
    margin-bottom: 50px;
}

.quiz-feature {
    background: rgba(255, 255, 255, 0.05);
    padding: 25px 20px;
    border-radius: 16px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    transition: var(--transition-medium);
    backdrop-filter: blur(10px);
}

.quiz-feature:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--tech-blue);
    transform: translateY(-5px);
}

.quiz-feature i {
    font-size: 32px;
    color: var(--tech-blue);
    margin-bottom: 15px;
    display: block;
}

.quiz-feature span {
    font-size: 16px;
    font-weight: 600;
    display: block;
}

.btn-quiz {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    padding: 20px 50px;
    background: linear-gradient(135deg, var(--tech-blue) 0%, #6BA3E8 100%);
    color: var(--white);
    font-size: 20px;
    font-weight: 700;
    border-radius: 50px;
    border: none;
    cursor: pointer;
    transition: var(--transition-medium);
    box-shadow: 0 10px 40px rgba(74, 144, 226, 0.4);
    text-decoration: none;
}

.btn-quiz:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 60px rgba(74, 144, 226, 0.6);
    background: linear-gradient(135deg, #3A7BC8 0%, #4A90E2 100%);
}

.btn-quiz i {
    font-size: 24px;
}

.quiz-note {
    margin-top: 30px;
    font-size: 14px;
    opacity: 0.7;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.quiz-note i {
    font-size: 16px;
}

/* Стиль для ссылки квиза в навигации */
.nav-link.quiz-link {
    color: var(--tech-blue);
    font-weight: 600;
}

.nav-link.quiz-link i {
    margin-right: 5px;
}

.nav-link.quiz-link:hover {
    color: #3A7BC8;
}

.nav-link.quiz-link::after {
    background: var(--tech-blue);
}

/* ===========================
   Преимущества
   =========================== */

.advantages {
    background: linear-gradient(135deg, var(--graphite) 0%, var(--wood-dark) 100%);
    color: var(--white);
    padding: 80px 0;
}

.advantages-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.advantage-item {
    text-align: center;
}

.advantage-icon {
    width: 80px;
    height: 80px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    transition: var(--transition-medium);
}

.advantage-item:hover .advantage-icon {
    background: var(--tech-blue);
    transform: scale(1.1);
}

.advantage-icon i {
    font-size: 32px;
}

.advantage-item h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 10px;
}

.advantage-item p {
    font-size: 15px;
    opacity: 0.9;
}

/* ===========================
   Портфолио
   =========================== */

.portfolio {
    background: var(--light-gray);
}

.portfolio-filters {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 12px 28px;
    background: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--graphite);
    cursor: pointer;
    transition: var(--transition-medium);
}

.filter-btn:hover,
.filter-btn.active {
    background: var(--tech-blue);
    border-color: var(--tech-blue);
    color: var(--white);
}

.portfolio-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 25px;
}

.portfolio-item {
    position: relative;
    border-radius: 16px;
    overflow: hidden;
    cursor: pointer;
    aspect-ratio: 4/3;
}

.portfolio-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.portfolio-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to top, rgba(44, 44, 44, 0.95) 0%, rgba(44, 44, 44, 0) 70%);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 30px;
    opacity: 0;
    transition: var(--transition-medium);
    color: var(--white);
}

.portfolio-item:hover .portfolio-overlay {
    opacity: 1;
}

.portfolio-item:hover img {
    transform: scale(1.1);
}

.portfolio-overlay h4 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 8px;
}

.portfolio-overlay p {
    font-size: 15px;
    opacity: 0.9;
}

.portfolio-item.hidden {
    display: none;
}

/* ===========================
   Новости и статьи (Блог)
   =========================== */

.blog {
    background: var(--white);
    padding: var(--section-padding) 0;
}

.blog-filters {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

.blog-filter {
    padding: 10px 24px;
    background: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 25px;
    font-size: 14px;
    font-weight: 600;
    color: var(--graphite);
    cursor: pointer;
    transition: var(--transition-medium);
}

.blog-filter:hover,
.blog-filter.active {
    background: var(--tech-blue);
    border-color: var(--tech-blue);
    color: var(--white);
    transform: translateY(-2px);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 30px;
    margin-bottom: 50px;
}

.blog-card {
    background: var(--white);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.08);
    transition: var(--transition-medium);
    display: flex;
    flex-direction: column;
}

.blog-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.blog-image {
    position: relative;
    width: 100%;
    height: 220px;
    overflow: hidden;
}

.blog-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-slow);
}

.blog-card:hover .blog-image img {
    transform: scale(1.1);
}

.blog-badge {
    position: absolute;
    top: 15px;
    right: 15px;
    padding: 6px 14px;
    background: var(--graphite);
    color: var(--white);
    font-size: 12px;
    font-weight: 700;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.blog-badge.badge-blue {
    background: var(--tech-blue);
}

.blog-badge.badge-green {
    background: #2ECC71;
}

.blog-badge.badge-orange {
    background: #E67E22;
}

.blog-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.blog-meta {
    display: flex;
    gap: 20px;
    margin-bottom: 15px;
    font-size: 13px;
    color: var(--wood-dark);
}

.blog-meta i {
    margin-right: 6px;
    color: var(--tech-blue);
}

.blog-title {
    font-family: 'Playfair Display', serif;
    font-size: 20px;
    font-weight: 700;
    color: var(--graphite);
    margin-bottom: 12px;
    line-height: 1.4;
}

.blog-excerpt {
    font-size: 14px;
    line-height: 1.6;
    color: var(--wood-dark);
    margin-bottom: 20px;
    flex: 1;
}

.blog-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    color: var(--tech-blue);
    font-size: 14px;
    font-weight: 700;
    text-decoration: none;
    transition: var(--transition-fast);
}

.blog-link:hover {
    gap: 12px;
    color: #3A7BC8;
}

.blog-link i {
    font-size: 12px;
    transition: var(--transition-fast);
}

.blog-cta {
    text-align: center;
    margin-top: 30px;
}

.blog-card.hidden {
    display: none;
}

/* ===========================
   Страница блога
   =========================== */

.page-header {
    background: linear-gradient(135deg, var(--wood-dark) 0%, var(--graphite) 100%);
    padding: 120px 0 80px;
    color: var(--white);
    text-align: center;
}

.page-header-content {
    max-width: 800px;
    margin: 0 auto;
}

.page-title {
    font-family: 'Playfair Display', serif;
    font-size: 52px;
    font-weight: 700;
    margin-bottom: 20px;
}

.page-subtitle {
    font-size: 18px;
    line-height: 1.6;
    opacity: 0.9;
    margin-bottom: 30px;
}

.breadcrumbs {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    opacity: 0.8;
}

.breadcrumbs a {
    color: var(--white);
    text-decoration: none;
    transition: var(--transition-fast);
}

.breadcrumbs a:hover {
    opacity: 0.7;
}

.breadcrumbs span {
    opacity: 0.5;
}

/* Пагинация */
.pagination-btn {
    padding: 10px 16px;
    background: var(--white);
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 15px;
    font-weight: 600;
    color: var(--graphite);
    cursor: pointer;
    transition: var(--transition-medium);
    min-width: 44px;
}

.pagination-btn:hover,
.pagination-btn.active {
    background: var(--tech-blue);
    border-color: var(--tech-blue);
    color: var(--white);
}

/* ===========================
   Страница статьи
   =========================== */

.article-page {
    background: var(--white);
}

.article-header {
    background: linear-gradient(135deg, var(--wood-dark) 0%, var(--graphite) 100%);
    padding: 120px 0 60px;
    color: var(--white);
}

.article-title {
    font-family: 'Playfair Display', serif;
    font-size: 48px;
    font-weight: 700;
    line-height: 1.2;
    margin: 20px 0 30px;
    max-width: 900px;
}

.article-meta {
    display: flex;
    flex-wrap: wrap;
    gap: 25px;
    font-size: 14px;
    opacity: 0.9;
}

.article-meta span {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.article-meta i {
    color: var(--tech-blue);
}

.article-featured-image {
    width: 100%;
    height: 500px;
    overflow: hidden;
    margin-bottom: 60px;
}

.article-featured-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.article-content {
    max-width: 820px;
    margin: 0 auto;
    padding: 0 20px 80px;
}

.article-intro {
    margin-bottom: 40px;
}

.article-intro .lead {
    font-size: 20px;
    line-height: 1.8;
    color: var(--graphite);
    font-weight: 500;
}

.article-content h2 {
    font-family: 'Playfair Display', serif;
    font-size: 36px;
    font-weight: 700;
    color: var(--graphite);
    margin: 50px 0 25px;
}

.article-content h3 {
    font-family: 'Playfair Display', serif;
    font-size: 28px;
    font-weight: 600;
    color: var(--graphite);
    margin: 40px 0 20px;
}

.article-content h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--graphite);
    margin: 30px 0 15px;
}

.article-content p {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 20px;
}

.article-content ul.article-list,
.article-content ol {
    margin: 25px 0;
    padding-left: 25px;
}

.article-content ul.article-list li,
.article-content ol li {
    font-size: 17px;
    line-height: 1.8;
    color: var(--text-light);
    margin-bottom: 12px;
}

.article-highlight {
    background: linear-gradient(135deg, #EBF4FF 0%, #E3F2FD 100%);
    border-left: 4px solid var(--tech-blue);
    padding: 25px 30px;
    margin: 35px 0;
    border-radius: 8px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.article-highlight i {
    font-size: 32px;
    color: var(--tech-blue);
    flex-shrink: 0;
    margin-top: 5px;
}

.article-highlight p {
    margin: 0;
    font-size: 16px;
}

.article-image {
    margin: 40px 0;
}

.article-image img {
    width: 100%;
    border-radius: 12px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
}

.image-caption {
    text-align: center;
    font-size: 14px;
    color: var(--wood-dark);
    margin-top: 12px;
    font-style: italic;
}

.article-gallery {
    margin: 40px 0;
}

.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    margin-bottom: 15px;
}

.gallery-grid img {
    width: 100%;
    height: 250px;
    object-fit: cover;
    border-radius: 12px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    transition: var(--transition-medium);
}

.gallery-grid img:hover {
    transform: translateY(-5px);
    box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15);
}

.article-features {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
    margin: 40px 0;
}

.feature-box {
    background: var(--light-gray);
    padding: 30px;
    border-radius: 12px;
    transition: var(--transition-medium);
}

.feature-box:hover {
    background: var(--white);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    transform: translateY(-3px);
}

.feature-box i {
    font-size: 36px;
    color: var(--tech-blue);
    margin-bottom: 15px;
    display: block;
}

.feature-box h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--graphite);
    margin-bottom: 10px;
}

.feature-box p {
    font-size: 15px;
    line-height: 1.6;
    margin: 0;
}

.article-quote {
    background: var(--light-gray);
    border-left: 4px solid var(--wood-dark);
    padding: 30px 40px;
    margin: 40px 0;
    font-style: italic;
}

.article-quote p {
    font-size: 18px;
    line-height: 1.7;
    color: var(--graphite);
    margin-bottom: 15px;
}

.article-quote cite {
    font-size: 15px;
    color: var(--wood-dark);
    font-weight: 600;
    font-style: normal;
}

.article-table {
    width: 100%;
    margin: 35px 0;
    border-collapse: collapse;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.05);
    border-radius: 8px;
    overflow: hidden;
}

.article-table thead {
    background: var(--tech-blue);
    color: var(--white);
}

.article-table th {
    padding: 18px 20px;
    text-align: left;
    font-weight: 600;
    font-size: 15px;
}

.article-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--medium-gray);
    font-size: 15px;
    color: var(--text-light);
}

.article-table tbody tr:last-child td {
    border-bottom: none;
}

.article-table tbody tr:hover {
    background: var(--light-gray);
}

.article-cta {
    background: linear-gradient(135deg, var(--tech-blue) 0%, #6BA3E8 100%);
    color: var(--white);
    padding: 50px;
    border-radius: 16px;
    text-align: center;
    margin: 60px 0 40px;
}

.article-cta h3 {
    font-family: 'Playfair Display', serif;
    font-size: 32px;
    font-weight: 700;
    color: var(--white);
    margin-bottom: 15px;
}

.article-cta p {
    font-size: 17px;
    color: var(--white);
    opacity: 0.95;
    margin-bottom: 30px;
}

.cta-buttons {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.article-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin: 40px 0;
    padding-top: 30px;
    border-top: 1px solid var(--medium-gray);
}

.tag {
    display: inline-block;
    padding: 8px 18px;
    background: var(--light-gray);
    color: var(--graphite);
    font-size: 13px;
    font-weight: 600;
    border-radius: 20px;
    transition: var(--transition-fast);
}

.tag:hover {
    background: var(--tech-blue);
    color: var(--white);
}

.article-navigation {
    margin-top: 50px;
    padding-top: 30px;
    border-top: 2px solid var(--medium-gray);
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.article-navigation a {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 20px;
    background: var(--light-gray);
    border-radius: 12px;
    text-decoration: none;
    transition: var(--transition-medium);
    flex: 1;
}

.article-navigation a:hover {
    background: var(--tech-blue);
    transform: translateX(5px);
}

.article-navigation a:hover span,
.article-navigation a:hover strong {
    color: var(--white);
}

.article-navigation span {
    font-size: 13px;
    color: var(--wood-dark);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.article-navigation strong {
    font-size: 16px;
    color: var(--graphite);
    font-weight: 600;
}

.nav-prev {
    text-align: left;
}

.nav-next {
    text-align: right;
}

/* Адаптивность для статей */
@media (max-width: 768px) {
    .article-header {
        padding: 100px 0 40px;
    }
    
    .article-title {
        font-size: 32px;
    }
    
    .article-featured-image {
        height: 300px;
    }
    
    .article-content h2 {
        font-size: 28px;
    }
    
    .article-content h3 {
        font-size: 22px;
    }
    
    .gallery-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .article-features {
        grid-template-columns: 1fr;
    }
    
    .article-cta {
        padding: 35px 25px;
    }
    
    .article-cta h3 {
        font-size: 24px;
    }
    
    .cta-buttons {
        flex-direction: column;
    }
    
    .article-navigation {
        flex-direction: column;
    }
}

/* ===========================
   Контакты
   =========================== */

.contacts {
    background: var(--white);
}

.contacts-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.contact-item {
    display: flex;
    gap: 20px;
}

.contact-icon {
    width: 60px;
    height: 60px;
    background: var(--tech-blue);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-icon i {
    font-size: 24px;
    color: var(--white);
}

.contact-details h4 {
    font-size: 18px;
    font-weight: 600;
    color: var(--graphite);
    margin-bottom: 8px;
}

.contact-details p,
.contact-details a {
    font-size: 16px;
    color: var(--text-light);
    margin-bottom: 5px;
}

.contact-details a:hover {
    color: var(--tech-blue);
}

.contact-form-wrapper {
    background: var(--light-gray);
    padding: 40px;
    border-radius: 16px;
}

.contact-form h3 {
    font-size: 28px;
    font-weight: 700;
    color: var(--graphite);
    margin-bottom: 10px;
}

.contact-form > p {
    color: var(--text-light);
    margin-bottom: 30px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 15px 20px;
    border: 2px solid var(--medium-gray);
    border-radius: 8px;
    font-size: 16px;
    font-family: var(--font-primary);
    transition: var(--transition-medium);
    background: var(--white);
}

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

.form-group textarea {
    resize: vertical;
}

.contact-form button {
    width: 100%;
    border: none;
}

.form-note {
    font-size: 13px;
    color: var(--text-light);
    text-align: center;
    margin-top: 15px;
}

/* ===========================
   Footer
   =========================== */

.footer {
    background: var(--graphite);
    color: var(--white);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
    margin-bottom: 40px;
}

.footer-section h4 {
    font-size: 20px;
    font-weight: 600;
    margin-bottom: 20px;
}

.footer-section ul li {
    margin-bottom: 12px;
}

.footer-section ul li a {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
}

.footer-section ul li a:hover {
    color: var(--tech-blue);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 15px;
    line-height: 1.6;
}

.footer-logo {
    margin-bottom: 15px;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    padding-top: 30px;
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.6);
    font-size: 14px;
}

/* ===========================
   Кнопка "Наверх"
   =========================== */

.scroll-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    background: var(--tech-blue);
    color: var(--white);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition-medium);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--graphite);
    transform: translateY(-5px);
}

/* ===========================
   Адаптивность
   =========================== */

@media (max-width: 1024px) {
    .hero-title {
        font-size: 52px;
    }
    
    .section-title {
        font-size: 40px;
    }
    
    .services-grid {
        grid-template-columns: 1fr;
    }
    
    .calculators-grid {
        grid-template-columns: 1fr;
    }
    
    .calculators-info {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .advantages-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quiz-features {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .quiz-title {
        font-size: 40px;
    }
    
    .contacts-content {
        grid-template-columns: 1fr;
    }
    
    .footer-content {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }
    
    .nav-links {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background: var(--white);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 30px;
        transition: var(--transition-medium);
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    }
    
    .nav-links.active {
        left: 0;
    }
    
    .nav-btn {
        display: none;
    }
    
    .burger {
        display: flex;
    }
    
    .burger.active span:nth-child(1) {
        transform: rotate(45deg) translate(8px, 8px);
    }
    
    .burger.active span:nth-child(2) {
        opacity: 0;
    }
    
    .burger.active span:nth-child(3) {
        transform: rotate(-45deg) translate(8px, -8px);
    }
    
    .hero-title {
        font-size: 40px;
    }
    
    .hero-subtitle {
        font-size: 18px;
    }
    
    .hero-features {
        flex-direction: column;
        gap: 25px;
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-title {
        font-size: 32px;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 20px;
    }
    
    .stat-value {
        font-size: 36px;
    }
    
    .advantages-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .quiz-features {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .quiz-title {
        font-size: 32px;
    }
    
    .quiz-description {
        font-size: 18px;
    }
    
    .btn-quiz {
        font-size: 18px;
        padding: 18px 40px;
    }
    
    .portfolio-grid {
        grid-template-columns: 1fr;
    }
    
    .blog-grid {
        grid-template-columns: 1fr;
        gap: 25px;
    }
    
    .blog-filters {
        flex-wrap: wrap;
        gap: 10px;
    }
    
    .blog-filter {
        font-size: 13px;
        padding: 8px 18px;
    }
    
    .page-header {
        padding: 100px 0 60px;
    }
    
    .page-title {
        font-size: 36px;
    }
    
    .page-subtitle {
        font-size: 16px;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 30px;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 32px;
    }
    
    .section-title {
        font-size: 28px;
    }
    
    .quiz-title {
        font-size: 28px;
    }
    
    .quiz-description {
        font-size: 16px;
    }
    
    .btn-quiz {
        font-size: 16px;
        padding: 16px 30px;
    }
    
    .quiz-icon {
        width: 80px;
        height: 80px;
    }
    
    .quiz-icon i {
        font-size: 36px;
    }
    
    .btn-large {
        padding: 16px 32px;
        font-size: 16px;
    }
    
    .contact-form-wrapper {
        padding: 30px 20px;
    }
}