/* ========================================
   DESIGN SYSTEM: SOUNDPROOFING LANDING
   Экосаундпроект | ecosp.by
   Версия: 3.0 (оптимизировано)
   ======================================== */

:root{--brand-dark:#0B1A2F;--brand-surface:#F8F9FA;--brand-accent:#E8751A;--brand-success:#2E7D32;--brand-success-light:#4ADE80;--text-primary:#0B1A2F;--text-secondary:#4A5568;--text-inverse:#FFF;--border-light:#E2E8F0;--shadow-card:#0b1a2f14;--tier-standard:#3B82F6;--tier-comfort:#10B981;--tier-premium:#8B5CF6;--hero-gradient:linear-gradient(135deg,#0B1A2F 0%,#1A3A5C 100%);--font-primary:Inter,system-ui,-apple-system,sans-serif;--font-mono:'JetBrains Mono',monospace;--section-padding-y:120px;--section-padding-y-sm:80px;--container-padding:24px;--radius-sm:4px;--radius-md:8px;--radius-lg:16px;--radius-full:9999px;--shadow-button:0 4px 14px #e8751a2e,0 1px 3px #0b1a2f1f;--shadow-card-hover:0 12px 32px #0b1a2f1f;--shadow-card-active:0 0 0 3px #e8751a4d;--transition-fast:.2s ease;--transition-base:.3s ease;--transition-slow:.5s ease}
*,::before,::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--font-primary);font-size:16px;line-height:1.5;color:var(--text-primary);background:var(--brand-surface);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{text-decoration:none;color:inherit}
ul{list-style:none}
h1,h2,h3,h4,h5,h6{font-family:var(--font-primary);font-weight:700;line-height:1.2;color:var(--text-primary)}
.display{font-size:48px;line-height:56px;font-weight:700}
.h1{font-size:36px;line-height:44px;font-weight:700}
.h2{font-size:28px;line-height:36px;font-weight:600}
.h3{font-size:20px;line-height:28px;font-weight:600}
.body-lg{font-size:18px;line-height:28px;font-weight:400}
.body{font-size:16px;line-height:24px;font-weight:400}
.body-sm{font-size:14px;line-height:20px;font-weight:400}
.label{font-size:14px;line-height:20px;font-weight:600}
.price-lg{font-family:var(--font-mono);font-size:32px;font-weight:700}
.price-md{font-family:var(--font-mono);font-size:24px;font-weight:600}
.mono{font-family:var(--font-mono)}
.container{width:100%;max-width:1200px;margin:0 auto;padding:0 var(--container-padding)}
.section{padding:var(--section-padding-y) 0}
.section-sm{padding:var(--section-padding-y-sm) 0}
.section-dark{background:var(--brand-dark);color:var(--text-inverse)}
.section-surface{background:var(--brand-surface)}
.btn{display:inline-flex;align-items:center;justify-content:center;gap:8px;padding:12px 32px;border-radius:var(--radius-md);font-size:16px;font-weight:600;font-family:var(--font-primary);cursor:pointer;transition:all var(--transition-base);border:none;white-space:nowrap}
#compositionModal .btn {padding:12px 20px;}
.btn-primary{background:var(--brand-accent);color:var(--text-inverse);box-shadow:var(--shadow-button)}
.btn-primary:hover{background:#D06510;box-shadow:0 6px 20px #e8751a40;transform:translateY(-2px)}
.btn-primary:active{transform:translateY(0);box-shadow:var(--shadow-button)}
.btn-secondary{background:transparent;color:var(--brand-accent);border:2px solid var(--brand-accent)}
.btn-secondary:hover{background:var(--brand-accent);color:var(--text-inverse)}
.btn-large{padding:16px 40px;font-size:18px}
.btn-full{width:100%}
.btn-sm{padding:8px 18px;font-size:13px}
.badge{display:inline-flex;align-items:center;padding:4px 12px;border-radius:var(--radius-full);font-size:12px;font-weight:600;text-transform:uppercase;letter-spacing:.5px;line-height:1}
.badge-accent{background:var(--brand-accent);color:var(--text-inverse)}
.badge-success{background:var(--brand-success);color:var(--text-inverse)}
.badge-success-light{background:var(--brand-success-light);color:var(--brand-dark)}
.badge-tier{color:var(--text-inverse);padding:4px 10px;border-radius:var(--radius-sm)}
.badge-tier-standard{background:var(--tier-standard)}
.badge-tier-comfort{background:var(--tier-comfort)}
.badge-tier-premium{background:var(--tier-premium)}
.form-group{margin-bottom:16px}
.form-input{width:100%;padding:14px 16px;border:2px solid var(--border-light);border-radius:var(--radius-md);font-size:16px;font-family:var(--font-primary);transition:border-color var(--transition-fast);background:#FFF}
.form-input:focus{outline:none;border-color:var(--brand-accent);box-shadow:0 0 0 3px #e8751a1a}
.form-input::placeholder{color:#9CA3AF}
.modal-overlay{position:fixed;top:0;left:0;width:100%;height:100%;background:#0b1a2fb3;display:flex;align-items:center;justify-content:center;z-index:1000;opacity:0;pointer-events:none;transition:opacity var(--transition-base)}
.modal-overlay.active{opacity:1;pointer-events:all}
.modal{background:#FFF;border-radius:var(--radius-lg);padding:40px;max-width:480px;width:90%;box-shadow:0 20px 60px #0b1a2f33;position:relative;max-height: 95%;overflow-y: auto;}
.modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:50%;background:var(--brand-surface);display:flex;align-items:center;justify-content:center;cursor:pointer;font-size:20px;border:none;color:var(--text-secondary);transition:all var(--transition-fast)}
.modal-close:hover{background:var(--border-light);color:var(--text-primary)}
@keyframes fadeIn{from{opacity:0;transform:translateY(16px)}to{opacity:1;transform:translateY(0)}}
.fade-in{opacity:0;transform:translateY(24px);transition:opacity .6s ease,transform .6s ease}
.fade-in.visible{opacity:1;transform:translateY(0)}

/* ========================================
   NAVIGATION
   ======================================== */
.landing-nav{position:sticky;top:0;left:0;width:100%;background:var(--brand-dark);z-index:1000;border-bottom:1px solid #ffffff14;transition:box-shadow var(--transition-base)}
.landing-nav.nav-sticky{box-shadow:0 4px 24px #0000004d}
@keyframes slideDown{from{transform:translateY(-100%)}to{transform:translateY(0)}}
.nav-container{display:flex;align-items:center;justify-content:space-between;height:60px;gap:16px}
.nav-logo{display:flex;align-items:center;text-decoration:none;flex-shrink:0}
.nav-logo-text{    text-transform: uppercase;font-size:18px;font-weight:700;color:var(--text-inverse);letter-spacing:-.3px;white-space:nowrap}
.nav-list{display:flex;align-items:center;gap:2px;list-style:none;margin:0;padding:0;flex-wrap:wrap;justify-content:center}
.nav-item{position:relative}
.nav-link{display:flex;align-items:center;gap:4px;padding:8px 12px;color:#ffffffbf;font-size:13px;font-weight:500;text-decoration:none;border-radius:var(--radius-sm);transition:all var(--transition-fast);white-space:nowrap;cursor:pointer}
.nav-link:hover{color:var(--text-inverse);background:#ffffff0f}
.nav-chevron{transition:transform var(--transition-fast);flex-shrink:0}
.nav-dropdown-menu{position:absolute;top:100%;left:0;background:#0F2338;border:1px solid #ffffff1a;border-radius:var(--radius-md);padding:6px 0;min-width:200px;list-style:none;margin:0;opacity:0;visibility:hidden;transform:translateY(6px);transition:all var(--transition-base);box-shadow:0 12px 32px #0006;z-index:1001}
.nav-dropdown-menu.show{opacity:1;visibility:visible;transform:translateY(2px)}
.nav-dropdown-menu li{margin:0}
.nav-dropdown-menu a{display:block;padding:10px 16px;color:#fffc;font-size:13px;text-decoration:none;transition:all var(--transition-fast)}
.nav-dropdown-menu a:hover{color:var(--text-inverse);background:#ffffff0f}
.nav-cta{flex-shrink:0;white-space:nowrap}
.nav-burger{display:none;flex-direction:column;gap:5px;background:none;border:none;cursor:pointer;padding:6px;z-index:1002}
.nav-burger span{display:block;width:22px;height:2px;background:var(--text-inverse);border-radius:1px;transition:all var(--transition-fast)}
.nav-burger.active span:nth-child(1){transform:rotate(45deg) translate(5px,5px)}
.nav-burger.active span:nth-child(2){opacity:0}
.nav-burger.active span:nth-child(3){transform:rotate(-45deg) translate(5px,-5px)}
.nav-mobile{display:none;background:var(--brand-dark);border-top:1px solid #ffffff14;max-height:calc(100vh - 60px);overflow-y:auto}
.nav-mobile.show{display:block}
.nav-mobile-list{list-style:none;padding:8px 0;margin:0}
.nav-mobile-list li{margin:0}
.nav-mobile-list a{display:block;padding:14px var(--container-padding);color:#fffc;font-size:15px;text-decoration:none;border-bottom:1px solid #ffffff0d}
.nav-mobile-list a:hover{color:var(--text-inverse);background:#ffffff0a}
.nav-mobile-divider{height:1px;background:#ffffff14;margin:8px 0}
.nav-mobile-list strong{padding:14px var(--container-padding);display:block;color:var(--brand-accent);font-size:12px;text-transform:uppercase;letter-spacing:1px}

/* ========================================
   HERO
   ======================================== */
.hero{background:var(--hero-gradient);color:var(--text-inverse);padding:var(--section-padding-y) 0 0;position:relative;overflow:visible}
.hero::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background-image:url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M30 5 Q45 15 30 30 Q15 45 30 55' fill='none' stroke='#ffffff08' stroke-width='1'/%3E%3C/svg%3E");opacity:.5;pointer-events:none}
.hero .container{position:relative;z-index:1;padding-bottom:80px}
.hero-content{max-width:80%}
.hero .display{color:var(--text-inverse);margin-bottom:24px}
.hero .display .highlight{color:var(--brand-accent)}
.hero .body-lg{color:#ffffffd9;margin-bottom:40px}
.hero-actions{display:flex;gap:16px;flex-wrap:wrap;align-items:center}
.hero-stats{display:flex;gap:48px;margin-top:64px}
.hero-stat{text-align:left}
.hero-stat-value{font-family:var(--font-mono);font-size:36px;font-weight:700;color:var(--brand-accent);line-height:1;margin-bottom:4px}
.hero-stat-label{font-size:14px;color:#ffffffb3}
.hero-visual{display:none}
.hero-health{display:flex;align-items:center;gap:12px;background:rgba(232,117,26,0.12);border:1px solid rgba(232,117,26,0.2);border-radius:12px;padding:14px 20px;max-width:520px;}
.hero-health svg{flex-shrink:0}
.hero-health p{font-size:14px;color:rgba(255,255,255,0.85);margin:0;line-height:1.5}
.hero-health strong{color:var(--brand-accent)}

/* ========================================
   QUIZ
   ======================================== */
   

.quiz-section{position:relative;overflow:hidden}
.quiz-bg{background:var(--hero-gradient);padding:var(--section-padding-y) 0;position:relative}
.quiz-wave-container{position:absolute;bottom:0;left:0;width:100%;height:180px;overflow:hidden;pointer-events:none;z-index:0}
.quiz-wave{position:absolute;bottom:0;width:200%;height:180px;left:-50%}
.quiz-wave-path{animation:waveMove 8s ease-in-out infinite;transform-origin:center bottom}
.quiz-wave-path-delayed{animation:waveMove 10s ease-in-out infinite reverse;transform-origin:center bottom}
@keyframes waveMove{0%,100%{transform:translateX(0) scaleY(1)}25%{transform:translateX(-1%) scaleY(.9)}50%{transform:translateX(0) scaleY(1.05)}75%{transform:translateX(1%) scaleY(.95)}}
.quiz-container{position:relative;z-index:1;max-width:680px;margin:0 auto}
.quiz-header{text-align:center;margin-bottom:32px}
.quiz-question{font-size:22px;font-weight:600;text-align:center;margin-bottom:28px;color:var(--text-inverse)}

/* Сетка выбора поверхности */
.quiz-grid{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.quiz-card{position:relative;display:flex;flex-direction:column;align-items:center;justify-content:center;text-align:center;padding:32px 16px;min-height:160px;border-radius:12px;overflow:hidden;cursor:pointer;background:rgba(255,255,255,0.04);border:1px solid rgba(255,255,255,0.08);transition:background 0.25s,border-color 0.25s}
.quiz-card:hover{background:rgba(255,255,255,0.1);border-color:rgba(232,117,26,0.4)}
.quiz-card img{position:absolute;top:0;left:0;width:100%;height:100%;object-fit:cover;opacity:0.12;transition:opacity 0.25s}
.quiz-card:hover img{opacity:0.22}
.quiz-card-title{position:relative;z-index:1;font-size:36px;font-weight:700;color:var(--brand-accent)}
.quiz-card-sub{position:relative;z-index:1;font-size:13px;color:rgba(255,255,255,0.5)}

/* Поля ввода */
#calcAreaInput,#calcLength,#calcHeight{background:rgba(232,117,26,0.12)!important;border-color:rgba(232,117,26,0.4)!important;transition:background 0.3s,border-color 0.3s}
#calcAreaInput:focus,#calcLength:focus,#calcHeight:focus{background:rgba(255,255,255,0.08)!important;border-color:#E8751A!important}

/* Карточка результата */
.quiz-result-card{background:#FFF;border-radius:var(--radius-lg);padding:36px;box-shadow:0 20px 60px #0000004d;text-align:center}

/* ========================================
   SOLUTION BLOCKS
   ======================================== */
.solution-header{text-align:center;margin-bottom:32px}
.solution-subtitle{max-width:700px;margin:12px auto 0}
.problem-description{display:flex;gap:20px;align-items:flex-start;background:linear-gradient(135deg,#e8751a0f,#0b1a2f08);border-left:4px solid var(--brand-accent);border-radius:0 var(--radius-md) var(--radius-md) 0;padding:24px 28px;margin-bottom:36px}
.problem-description-icon{flex-shrink:0;width:52px;height:52px;background:var(--brand-accent);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff}
.problem-description-text h3{font-size:20px;font-weight:700;color:var(--brand-dark);margin:0 0 10px}
.problem-description-text p{font-size:16px;line-height:1.7;color:var(--text-secondary);margin:0}
.solution-layout{display:grid;grid-template-columns:30% 1fr;gap:32px;align-items:start}
.solution-video-col video{width:100%;display:block;border-radius:var(--radius-lg);box-shadow:0 4px 16px #0b1a2f1a}
.solution-cards-col{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.solution-card{background:#FFF;border-radius:var(--radius-md);padding:28px;box-shadow:0 1px 3px var(--shadow-card);transition:all var(--transition-base);position:relative;overflow:hidden}
.solution-card::before{content:'';position:absolute;top:0;left:0;width:4px;height:100%}
.solution-card:hover{transform:translateY(-4px);box-shadow:var(--shadow-card-hover)}
.solution-card .badge{margin-bottom:12px}
.solution-card-title{font-size:20px;font-weight:700;margin-bottom:16px;color:var(--text-primary)}
.solution-features{list-style:none;padding:0;margin:0 0 8px}
.solution-features li{padding:6px 0;font-size:14px;color:var(--text-secondary);border-bottom:1px solid var(--border-light)}
.solution-features li:last-child{border-bottom:none}
.instruction-link{display:inline-flex;align-items:center;gap:4px;font-size:13px;color:var(--text-secondary);text-decoration:none;margin-top:8px;transition:color var(--transition-fast)}
.instruction-link:hover{color:var(--brand-accent)}
.card-tier-standard::before{background:var(--tier-standard)}
.card-tier-comfort::before{background:var(--tier-comfort)}
.card-tier-premium::before{background:var(--tier-premium)}
.solution-card-image{position:relative;width:100%;height:200px;border-radius:var(--radius-sm);overflow:hidden;margin-bottom:14px}
.solution-card-image img{width:100%;height:100%;object-fit:cover}
.solution-card-image .badge{position:absolute;top:12px;left:12px;z-index:2}
.solution-card-image .solution-card-title{position:absolute;bottom:0;left:0;right:0;padding:40px 16px 14px;background:linear-gradient(transparent,rgba(0,0,0,0.75));color:#fff;font-size:16px;font-weight:600;margin:0;z-index:2}

/* Пиктограммы материалов в карточке */
.solution-materials-preview{display:flex;flex-direction:row;gap:6px;align-items:center}
.solution-materials-preview img{width:64px;height:64px;border-radius:var(--radius-sm);object-fit:cover;border:1px solid var(--border-light)}
.solution-materials-more{font-size:13px;color:var(--brand-accent);cursor:pointer;font-weight:500;margin-left:6px;white-space:nowrap}

/* Кнопка «Подробнее о составе» */
.solution-materials-link{display:inline-flex;align-items:center;gap:6px;margin-top:12px;padding:10px 20px;background:var(--brand-accent);color:#fff;font-size:14px;font-weight:600;border-radius:var(--radius-md);cursor:pointer;transition:all var(--transition-base);border:none;text-decoration:none;width:100%;justify-content:center}
.solution-materials-link:hover{background:#D06510;transform:translateY(-1px);box-shadow:var(--shadow-button)}

/* Модальное окно состава */
.modal-wide{max-width:720px}
.modal-composition-header{display:flex;gap:20px;margin-bottom:24px;align-items:flex-start}
.modal-composition-header img{width:200px;height:140px;border-radius:var(--radius-md);object-fit:cover;flex-shrink:0}
.modal-composition-info{flex:1}
.modal-composition-info .badge{margin-bottom:8px}
.modal-composition-info h3{font-size:22px;font-weight:700;margin:0 0 12px;color:var(--text-primary)}
.modal-composition-params{display:flex;gap:20px;flex-wrap:wrap}
.modal-composition-param{text-align:center}
.modal-composition-param-value{font-family:var(--font-mono);font-size:22px;font-weight:700;color:var(--brand-dark)}
.modal-composition-param-label{font-size:12px;color:var(--text-secondary)}
.modal-materials-title{font-size:16px;font-weight:600;color:var(--text-primary);margin-bottom:16px;padding-bottom:8px;border-bottom:1px solid var(--border-light)}
.modal-materials-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(250px,1fr));gap:8px;margin-bottom:1rem}
.modal-material-item{display:flex;gap:12px;align-items:center;padding:12px;background:var(--brand-surface);border-radius:var(--radius-md)}
.modal-material-item img{width:72px;height:72px;border-radius:var(--radius-sm);object-fit:cover;flex-shrink:0}
.material-card:hover{transform:translateY(-4px);box-shadow:0 12px 28px rgba(11,26,47,0.12)}
.material-card:hover .material-card-image img{transform:scale(1.05)}
.modal-material-name{font-size:14px;font-weight:600;color:var(--text-primary);margin-bottom:2px}
.modal-material-price{font-family:var(--font-mono);font-size:15px;color:var(--brand-accent);font-weight:600}
.modal-material-unit{font-size:12px;color:var(--text-secondary)}

@media (max-width:768px){
.modal-composition-header{flex-direction:column}
.modal-composition-header img{width:100%;height:180px}
.modal-materials-grid{grid-template-columns:1fr}
}

/* ========================================
   PHOTO CAROUSEL
   ======================================== */
.photo-slider-section{position:relative}
.photo-carousel-wrapper{position:relative;overflow:hidden}
.photo-carousel{display:flex;gap:16px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none;padding:8px 4px 16px}
.photo-carousel::-webkit-scrollbar{display:none}
.photo-carousel-item{flex:0 0 280px;scroll-snap-align:start;border-radius:var(--radius-md);overflow:hidden;box-shadow:0 2px 8px #0b1a2f14;transition:transform var(--transition-fast);background:#fff}
.photo-carousel-item:hover{transform:scale(1.03)}
.photo-thumb{width:100%;height:200px;object-fit:cover;display:block;cursor:pointer}
.carousel-btn{position:absolute;top:50%;transform:translateY(-50%);width:40px;height:40px;background:#FFF;border:1px solid var(--border-light);border-radius:50%;font-size:22px;cursor:pointer;box-shadow:0 2px 8px #0b1a2f1a;z-index:5;display:flex;align-items:center;justify-content:center;color:var(--text-primary);transition:all var(--transition-fast)}
.carousel-btn:hover{box-shadow:0 4px 16px #0b1a2f33;color:var(--brand-accent)}
.carousel-prev{left:8px}
.carousel-next{right:8px}

/* ========================================
   REVIEWS
   ======================================== */
.reviews-carousel-wrapper{position:relative;overflow:hidden}
.reviews-carousel{display:flex;gap:24px;overflow-x:auto;scroll-snap-type:x mandatory;scroll-behavior:smooth;-webkit-overflow-scrolling:touch;scrollbar-width:none;-ms-overflow-style:none;padding:8px 4px 16px}
.reviews-carousel::-webkit-scrollbar{display:none}
.review-card{flex:0 0 320px;scroll-snap-align:start;border-radius:var(--radius-md);overflow:hidden;box-shadow:0 2px 12px #0b1a2f14;transition:transform var(--transition-fast);background:#fff}
.review-card:hover{transform:scale(1.02)}
.review-image{width:100%;height:auto;display:block;cursor:pointer}

/* ========================================
   PORTFOLIO (CASES)
   ======================================== */
.cases-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(350px,1fr));gap:24px;margin-top:40px}
.case-card{background:#FFF;border-radius:var(--radius-md);overflow:hidden;box-shadow:0 1px 3px var(--shadow-card)}
.case-card-image{width:100%;min-height:200px;object-fit:cover;background:var(--brand-dark)}
.case-card-body{padding:20px}
.case-card-problem{font-size:14px;color:var(--text-secondary);margin-bottom:4px}
.case-card-solution{font-size:16px;font-weight:600;margin-bottom:8px}
.case-card-result{font-family:var(--font-mono);font-size:18px;font-weight:600;color:var(--brand-success)}

/* ========================================
   FAQ
   ======================================== */
.faq{background:#FFF}
.faq-list{max-width:768px;margin:40px auto 0}
.faq-item{border-bottom:1px solid var(--border-light)}
.faq-question{width:100%;padding:20px 0;display:flex;justify-content:space-between;align-items:center;cursor:pointer;font-size:18px;font-weight:500;background:none;border:none;color:var(--text-primary);text-align:left;transition:color var(--transition-fast)}
.faq-question:hover{color:var(--brand-accent)}
.faq-question::after{content:'+';font-size:24px;font-weight:300;color:var(--brand-accent);transition:transform var(--transition-base);flex-shrink:0;margin-left:16px}
.faq-item.active .faq-question::after{transform:rotate(45deg)}
.faq-answer{max-height:0;overflow:hidden;transition:max-height var(--transition-slow),padding var(--transition-slow)}
.faq-item.active .faq-answer{max-height:500px;padding-bottom:20px}
.faq-answer-inner{font-size:16px;line-height:1.7;color:var(--text-secondary)}

/* ========================================
   FINAL CTA
   ======================================== */
.cta-section{background:var(--hero-gradient);color:var(--text-inverse);text-align:center;position:relative;overflow:hidden}
.cta-section::before{content:'';position:absolute;top:0;left:0;width:100%;height:100%;background:radial-gradient(circle at center,#e8751a1a,transparent 70%);pointer-events:none}
.cta-section .container{position:relative;z-index:1}
.cta-section .h2{color:var(--text-inverse);margin-bottom:16px}
.cta-section .body-lg{color:#fffc;margin-bottom:32px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-guarantee{display:flex;align-items:center;justify-content:center;gap:8px;margin-top:16px;font-size:14px;color:#fff9}

/* ========================================
   FOOTER
   ======================================== */
.footer{background:#060E1A;color:#ffffffb3;padding:48px 0 24px}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:32px;margin-bottom:40px}
.footer-brand{font-size:20px;font-weight:700;color:var(--text-inverse);margin-bottom:8px}
.footer-text{font-size:14px;line-height:1.6}
.footer-title{font-size:14px;font-weight:600;color:var(--text-inverse);text-transform:uppercase;letter-spacing:.5px;margin-bottom:16px}
.footer-link{display:block;font-size:14px;color:#fff9;padding:4px 0;transition:color var(--transition-fast)}
.footer-link:hover{color:var(--brand-accent)}
.footer-phone{font-family:var(--font-mono);font-size:18px;font-weight:600;color:var(--brand-accent);display:block;margin-bottom:4px}
.footer-bottom{border-top:1px solid #ffffff1a;padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:16px;font-size:14px}

/* ========================================
   RESPONSIVE
   ======================================== */
@media (max-width:1024px){
:root{--section-padding-y:80px;--section-padding-y-sm:60px}
.display{font-size:36px;line-height:44px}
.h1{font-size:28px;line-height:36px}
.hero-stats{gap:32px;flex-wrap:wrap}
.hero-stat-value{font-size:28px}
.nav-list{display:none}
.nav-cta{margin-left:auto}
.nav-burger{display:flex}
}

@media (max-width:900px){
.solution-layout{grid-template-columns:1fr;gap:24px}
.solution-cards-col{grid-template-columns:1fr}
.problem-description{flex-direction:column;gap:16px;padding:20px}
.problem-description-icon{width:44px;height:44px}
}

@media (max-width:768px){
:root{--section-padding-y:60px;--section-padding-y-sm:40px;--container-padding:16px}
.display{font-size:28px;line-height:36px}
.h1{font-size:24px;line-height:32px}
.h2{font-size:22px;line-height:30px}
.body-lg{font-size:16px;line-height:24px}
.hero{padding-top:60px}
.hero .container{padding-bottom:60px}
.hero-stats{gap:24px}
.hero-stat-value{font-size:28px}
.hero-actions{flex-direction:column}
.hero-actions .btn{width:100%;justify-content:center}
.quiz-result-specs{flex-direction:column;gap:16px}
.quiz-result-price{font-size:32px}
.quiz-result-card{padding:24px}
.photo-carousel-item{flex:0 0 240px}
.review-card{flex:0 0 280px}
.carousel-btn{width:36px;height:36px;font-size:18px}
.carousel-prev{left:-4px}
.carousel-next{right:-4px}
.cases-grid{grid-template-columns:1fr}
.footer-grid{grid-template-columns:1fr}
.modal{padding:24px}
}

@media (max-width:640px){
.nav-cta{display:none}
.nav-logo-text{font-size:16px}
}

@media (max-width:480px){
.display{font-size:24px;line-height:32px}
.hero-stats{gap:20px}
.hero-stat-value{font-size:24px}
.quiz-option{padding:16px}
}

.modal-material-price{font-family:var(--font-mono);font-weight:700;color:var(--brand-accent);margin:12px 0}
.modal-material-params{display:flex;flex-wrap:wrap;gap:8px;margin-bottom:16px}
.modal-param-tag{background:#E8EDF3;padding:6px 12px;border-radius:var(--radius-sm);font-size:13px;color:var(--text-primary);border:1px solid var(--border-light)}
.modal-material-description{font-size:14px;color:var(--text-secondary);line-height:1.7;max-height:200px;overflow-y:auto}