/* ============================================================
   ООО «БЕЛСТРОЙБЛОК» — стили статического сайта
   Палитра: серые тона, акцент — красный #d9232e
   ============================================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: "Helvetica Neue", Arial, sans-serif;
    color: #1a1a1a;
    background: #ffffff;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
}

button {
    font-family: inherit;
}

img {
    display: block;
}

/* ---------- Прелоадер ---------- */
#preloader {
    position: fixed;
    inset: 0;
    z-index: 9999;
    background: #161616;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity .8s cubic-bezier(.16,1,.3,1);
}

#preloader.hide {
    opacity: 0;
    pointer-events: none;
}

#preloader .pl-inner {
    opacity: 0;
    transform: translateY(40px);
    transition: transform .6s cubic-bezier(.16,1,.3,1), opacity .6s ease;
}

#preloader.show .pl-inner {
    opacity: 1;
    transform: translateY(0);
}

/* ---------- Логотип ---------- */
.logo {
    display: inline-flex;
    align-items: center;
    gap: 20px;
    user-select: none;
}

.logo-text {
    font-size: 17px;
    font-weight: 600;
    letter-spacing: .18em;
    line-height: 1.1;
}

.logo-text .red {
    color: #d9232e;
}

/* ---------- Шапка ---------- */
header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 clamp(20px,4vw,60px);
    height: 88px;
    background: rgba(20,20,20,.35);
    backdrop-filter: blur(6px);
    -webkit-backdrop-filter: blur(6px);
    border-bottom: 1px solid rgba(255,255,255,.18);
    transition: height .4s cubic-bezier(.16,1,.3,1), background-color .4s ease, border-color .4s ease;
}

header.solid {
    height: 64px;
    background: #ffffff;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
    border-bottom: 1px solid #d4d4d4;
}

header .logo-text {
    color: #ffffff;
    transition: color .4s ease;
}

header.solid .logo-text {
    color: #1a1a1a;
}

nav {
    display: flex;
    align-items: stretch;
    height: 100%;
}

.nav-btn {
    display: flex;
    align-items: center;
    padding: 0 22px;
    font-size: 13px;
    letter-spacing: .08em;
    background: transparent;
    color: #fff;
    border: none;
    cursor: pointer;
    text-transform: uppercase;
    transition: background-color .25s, color .25s;
    white-space: nowrap;
}

header.solid .nav-btn {
    color: #3d3d3d;
}

.nav-btn:hover {
    background: #d9232e;
    color: #fff !important;
}

.nav-phone {
    display: flex;
    align-items: center;
    padding: 0 24px;
    font-size: 13px;
    font-weight: 600;
    letter-spacing: .06em;
    color: #d9232e;
    text-decoration: none;
    white-space: nowrap;
    font-variant-numeric: tabular-nums;
}

.logo-link {
    cursor: pointer;
    display: flex;
    align-items: center;
}

@media (max-width: 860px) {
    nav .nav-btn {
        display:none;
    }
}

/* ---------- Главный экран ---------- */
.hero {
    position: relative;
    width: 100%;
    min-height: 640px;
    overflow: hidden;
    background: #161616;
    display: flex;
    align-items: center;
    padding: 120px 0px;
}

.hero img.bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero .overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(10,10,10,.62) 0%, rgba(10,10,10,.35) 35%, rgba(10,10,10,.66) 100%);
}

.hero .content {
    position: relative;
    z-index: 2;
    padding: 0 clamp(32px,4.5vw,72px);
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 28px;
}

.hero .kicker {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .28em;
    color: rgba(255,255,255,.85);
    text-transform: uppercase;
}

.hero h1 {
    font-size: clamp(44px,7vw,108px);
    font-weight: 400;
    letter-spacing: -.03em;
    line-height: 1.02;
    color: #fff;
    max-width: 960px;
    text-shadow: 0 2px 24px rgba(0,0,0,.3);
}

.hero h1 .red {
    color: #d9232e;
}

.hero p.lead {
    font-size: clamp(15px,1.2vw,18px);
    font-weight: 300;
    line-height: 1.65;
    color: rgba(255,255,255,.9);
    max-width: 560px;
}

.hero .cta-row {
    display: flex;
    gap: 16px;
    margin-top: 12px;
    flex-wrap: wrap;
}

.btn-red {
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .14em;
    color: #fff;
    background: #d9232e;
    border: 1px solid #d9232e;
    padding: 16px 36px;
    cursor: pointer;
    text-transform: uppercase;
    transition: background-color .3s;
    text-decoration: none;
    display: inline-block;
}

.btn-red:hover {
    background: #b71c26;
}

.btn-link {
    display: inline-flex;
    align-items: center;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .14em;
    color: #fff;
    padding: 16px 8px;
    text-transform: uppercase;
    text-decoration: underline;
    text-underline-offset: 6px;
}

.hero .meta {
    display: flex;
    gap: 32px;
    margin-top: 24px;
    flex-wrap: wrap;
    font-size: 13px;
    color: rgba(255,255,255,.75);
    letter-spacing: .04em;
}

/* ---------- Анимация появления ---------- */
.fade {
    opacity: 0;
    transform: translateY(50px);
    transition: opacity .9s cubic-bezier(.16,1,.3,1), transform .9s cubic-bezier(.16,1,.3,1);
}

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

/* ---------- О заводе ---------- */
.about {
    background: #ffffff;
    padding: 160px clamp(20px,4vw,60px);
}

.about .wrap {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    gap: 80px;
    flex-wrap: wrap;
    align-items: flex-start;
}

.about .statement {
    flex: 1 1 700px;
    font-size: clamp(28px,4vw,60px);
    font-weight: 400;
    line-height: 1.25;
    letter-spacing: -.02em;
    color: #1a1a1a;
    max-width: 1200px;
}

.about .tags {
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding-top: 12px;
}

.tag {
    font-size: 11px;
    font-weight: 500;
    letter-spacing: .18em;
    color: #1a1a1a;
    padding: 10px 18px;
    border: 1px solid #1a1a1a;
    white-space: nowrap;
    text-transform: uppercase;
}

.tag.red {
    background: #d9232e;
    border-color: #d9232e;
    color: #fff;
    font-weight: 600;
}

/* ---------- Каталог ---------- */
.catalog {
    background: #f0f0f1;
    padding: 120px clamp(20px,4vw,60px);
}

.catalog .wrap {
    max-width: 1560px;
    margin: 0 auto;
}

.section-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 60px;
    border-bottom: 1px solid #1a1a1a;
    padding-bottom: 20px;
    flex-wrap: wrap;
    gap: 12px;
}

.section-head h2 {
    font-size: clamp(36px,5vw,64px);
    font-weight: 400;
    letter-spacing: -.03em;
    line-height: 1;
}

.section-head span {
    font-size: 12px;
    letter-spacing: .18em;
    color: #666;
}

.grid {
    display: grid;
    gap: 20px;
    grid-template-columns: repeat(3, 2fr);
}

.card {
    border: 1px solid #ababab;
    background: #fff;
    padding: 0;
    cursor: pointer;
    text-align: left;
    display: block;
    width: 100%;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0px 0px15px #ccc;
}

.card .imgbox {
    position: relative;
    width: 100%;
    padding-bottom: 60%;
    overflow: hidden;
    background: #e5e5e5;
}

.card .imgbox img {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform .6s cubic-bezier(.16,1,.3,1);
}

.card:hover .imgbox img {
    transform: scale(1.04);
}

.card .info {
    padding: 20px 24px;
    border-top: 1px solid #ababab;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
    background: #ddd;
}

.card .cat {
    font-size: 11px;
    letter-spacing: .2em;
    color: #8a8a8a;
    text-transform: uppercase;
    margin-bottom: 6px;
}

.card .name {
    font-size: 17px;
    font-weight: 500;
    color: #1a1a1a;
    letter-spacing: -.01em;
    line-height: 1.35;
}

.card .price {
    font-size: 20px;
    font-weight: 600;
    color: #d9232e;
    font-variant-numeric: tabular-nums;
    text-align: right;
}

.card .per {
    font-size: 11px;
    letter-spacing: .14em;
    color: #8a8a8a;
    text-transform: uppercase;
    text-align: right;
}

/* ---------- Преимущества (глассморфизм) ---------- */
.adv {
    position: relative;
    overflow: hidden;
    background: #161616;
    padding: clamp(100px,12vw,160px) clamp(20px,4vw,60px);
}

.adv img.bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.adv .overlay {
    position: absolute;
    inset: 0;
    background: rgba(12,12,12,.55);
}

.adv .wrap {
    position: relative;
    z-index: 2;
    max-width: 1400px;
    margin: 0 auto;
}

.adv .head {
    display: flex;
    gap: clamp(32px,6vw,80px);
    align-items: flex-start;
    justify-content: space-between;
    flex-wrap: wrap;
    margin-bottom: 60px;
    padding-bottom: 28px;
    border-bottom: 1px solid rgba(255,255,255,.35);
}

.adv .kicker {
    font-size: 11px;
    letter-spacing: .24em;
    color: rgba(255,255,255,.7);
    text-transform: uppercase;
    margin-bottom: 18px;
}

.adv h2 {
    font-size: clamp(40px,6vw,80px);
    font-weight: 400;
    letter-spacing: -.03em;
    line-height: 1;
    color: #fff;
    margin-bottom: 24px;
}

.adv h2 .red {
    color: #d9232e;
}

.adv .sub {
    font-size: clamp(15px,1.2vw,18px);
    font-weight: 300;
    line-height: 1.6;
    color: rgba(255,255,255,.78);
    max-width: 640px;
}

/* стеклянные карточки */
.adv ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(min(100%,320px),1fr));
    gap: 18px;
}

.adv li {
    background: rgba(255,255,255,.07);
    backdrop-filter: blur(14px) saturate(140%);
    -webkit-backdrop-filter: blur(14px) saturate(140%);
    border: 1px solid rgba(255,255,255,.16);
    border-radius: 6px;
    box-shadow: 0 8px 32px rgba(0,0,0,.28), inset 0 1px 0 rgba(255,255,255,.12);
    padding: 28px 32px;
    display: flex;
    gap: 20px;
    align-items: flex-start;
    min-height: 140px;
    transition: background .3s ease, border-color .3s ease, transform .3s ease;
}

.adv li:hover {
    background: rgba(255,255,255,.12);
    border-color: rgba(217,35,46,.55);
    transform: translateY(-3px);
}

.adv li .num {
    flex: 0 0 auto;
    width: 28px;
    font-size: 11px;
    letter-spacing: .14em;
    color: rgba(255,255,255,.6);
    font-variant-numeric: tabular-nums;
    padding-top: 7px;
}

.adv li:nth-child(3n+1) .num {
    color: #d9232e;
}

.adv li h3 {
    font-size: clamp(18px,1.6vw,24px);
    font-weight: 500;
    letter-spacing: -.01em;
    line-height: 1.2;
    color: #fff;
    margin-bottom: 10px;
}

.adv li p {
    font-size: 14px;
    line-height: 1.55;
    color: rgba(255,255,255,.78);
}

/* ---------- Контакты ---------- */
.contacts {
    background: #161616;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(min(100%,480px),1fr));
    min-height: 700px;
}

.contacts .visual {
    position: relative;
    min-height: 420px;
    overflow: hidden;
    background: linear-gradient(135deg,#3a3a3a 0%,#161616 40%,#4a1013 75%,#161616 100%);
}

.contacts .visual .vcap {
    position: absolute;
    bottom: clamp(24px,4vw,48px);
    left: clamp(24px,4vw,48px);
    right: clamp(24px,4vw,48px);
    z-index: 2;
}

.contacts .visual h2 {
    font-size: clamp(36px,4.5vw,64px);
    font-weight: 400;
    letter-spacing: -.03em;
    line-height: 1.02;
    color: #fff;
    margin-bottom: 16px;
}

.contacts .visual .sub {
    font-size: 13px;
    letter-spacing: .18em;
    color: rgba(255,255,255,.9);
    text-transform: uppercase;
}

.contacts .panel {
    color: #fff;
    padding: clamp(40px,5vw,72px) clamp(24px,4vw,60px);
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.contacts .panel-inner {
    max-width: 520px;
    width: 100%;
    margin: 0 auto;
}

.contacts .kicker {
    font-size: 11px;
    letter-spacing: .24em;
    color: rgba(255,255,255,.6);
    text-transform: uppercase;
    margin-bottom: 14px;
}

.contacts h3 {
    font-size: clamp(28px,3.2vw,40px);
    font-weight: 400;
    letter-spacing: -.02em;
    line-height: 1.15;
    margin-bottom: 36px;
}

.crow {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 16px;
    padding: 20px 0;
    border-top: 1px solid rgba(255,255,255,.18);
    align-items: baseline;
}

.crow .lbl {
    font-size: 11px;
    letter-spacing: .2em;
    color: rgba(255,255,255,.5);
    text-transform: uppercase;
}

.crow .val {
    font-size: clamp(16px,1.6vw,20px);
    font-weight: 500;
    color: #fff;
    line-height: 1.4;
}

.crow a .val, a .crow .val {
    transition: color .25s;
}

a.crow {
    text-decoration: none;
    display: grid;
}

a.crow:hover .val {
    color: #d9232e;
}

.contacts .note {
    margin-top: 32px;
    font-size: 13px;
    line-height: 1.7;
    color: rgba(255,255,255,.55);
}

/* ---------- Подвал ---------- */
footer {
    background: #ffffff;
    border-top: 1px solid #d4d4d4;
    padding: 80px clamp(20px,4vw,60px) 0;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    overflow: hidden;
}

.fgrid {
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(240px,1fr));
    gap: 40px;
    padding-bottom: 60px;
}

.fhead {
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .18em;
    color: #1a1a1a;
    margin-bottom: 20px;
}

.ftext {
    font-size: 14px;
    color: #666;
    line-height: 1.9;
}

.fcompany {
    font-size: 16px;
    font-weight: 500;
    color: #1a1a1a;
    margin-bottom: 10px;
}

footer a {
    color: #666;
    text-decoration: none;
}

footer a.red {
    color: #d9232e;
    font-weight: 600;
}

.doc-link {
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-size: 13px;
    color: #666;
    text-decoration: underline;
    text-underline-offset: 4px;
    text-align: left;
    transition: color .2s;
}

.doc-link:hover {
    color: #d9232e;
}

.bottom-bar {
    border-top: 1px solid #e2e2e2;
    padding: 26px 0;
    text-align: center;
    font-size: 12px;
    color: #8a8a8a;
    letter-spacing: .08em;
}

/* ---------- Модальные окна ---------- */
.modal-back {
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(10,10,10,.65);
    display: none;
    align-items: center;
    justify-content: center;
    padding: 24px;
}

.modal-back.open {
    display: flex;
}

.modal {
    background: #fff;
    width: 100%;
    max-width: 760px;
    max-height: 82vh;
    display: flex;
    flex-direction: column;
    border: 1px solid #1a1a1a;
}

.modal .mhead {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 22px 28px;
    border-bottom: 1px solid #d4d4d4;
}

.modal .mhead h3 {
    font-size: clamp(17px,2vw,22px);
    font-weight: 600;
    color: #1a1a1a;
    letter-spacing: -.01em;
    line-height: 1.3;
}

.mclose {
    flex: 0 0 auto;
    width: 40px;
    height: 40px;
    border: 1px solid #1a1a1a;
    background: transparent;
    color: #1a1a1a;
    font-size: 20px;
    line-height: 1;
    cursor: pointer;
    transition: all .2s;
}

.mclose:hover {
    background: #d9232e;
    border-color: #d9232e;
    color: #fff;
}

.modal .mbody {
    padding: 28px;
    overflow-y: auto;
    font-size: 14px;
    line-height: 1.75;
    color: #3d3d3d;
}

.modal .mbody h4 {
    font-size: 15px;
    font-weight: 600;
    color: #1a1a1a;
    margin-top: 22px;
    margin-bottom: 10px;
}

.modal .mbody p {
    margin-bottom: 14px;
}

/* модальное окно товара */
.pmodal {
    max-width: 960px;
}

.pmodal .pbody {
    padding: 0;
    overflow-y: auto;
}

.pmodal .pimg {
    width: 100%;
    height: 320px;
    object-fit: cover;
    background: #e5e5e5;
}

.pmodal .pcols {
    display: grid;
    grid-template-columns: repeat(auto-fit,minmax(min(100%,380px),1fr));
    gap: 36px;
    padding: 32px;
}

.pmodal .ptag {
    font-size: 16px;
    font-weight: 300;
    color: #555;
    line-height: 1.5;
    margin-bottom: 20px;
}

.pmodal .pdesc {
    font-size: 14px;
    line-height: 1.8;
    color: #3d3d3d;
    margin-bottom: 14px;
}

.pmodal ul {
    list-style: none;
    border-top: 1px solid #d4d4d4;
    margin-top: 20px;
}

.pmodal ul li {
    padding: 12px 0;
    border-bottom: 1px solid #d4d4d4;
    font-size: 14px;
    color: #3d3d3d;
    display: flex;
    gap: 12px;
    align-items: baseline;
}

.pmodal ul li::before {
    content: "—";
    color: #d9232e;
    font-weight: 600;
}

.pspec {
    border: 1px solid #1a1a1a;
    background: #fafafa;
}

.pspec .pprice-box {
    padding: 28px;
}

.pspec .pprice {
    font-size: 44px;
    font-weight: 500;
    color: #d9232e;
    letter-spacing: -.02em;
    line-height: 1;
    font-variant-numeric: tabular-nums;
}

.pspec .pnote {
    font-size: 13px;
    color: #8a8a8a;
    margin-top: 8px;
}

.pspec .prow {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    padding: 13px 28px;
    border-top: 1px solid #e2e2e2;
    font-size: 14px;
}

.pspec .prow .k {
    color: #8a8a8a;
}

.pspec .prow .v {
    color: #1a1a1a;
    font-weight: 500;
    text-align: right;
}

.pspec .pcta {
    display: block;
    text-align: center;
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .14em;
    color: #fff;
    background: #d9232e;
    padding: 18px;
    text-decoration: none;
    text-transform: uppercase;
    transition: background-color .25s;
    margin: 20px 28px 8px;
}

.pspec .pcta:hover {
    background: #b71c26;
}

.pspec .phours {
    font-size: 12px;
    color: #8a8a8a;
    text-align: center;
    padding-bottom: 24px;
}