/* =====================================================================
   TIRYAKI KOLI — Ön Yüz Stilleri
   Palet: lacivert (logo zemini) + turuncu (logo aksanı) + kraft/mukavva
   Tipografi: Archivo (başlık, endüstriyel) + Inter (metin)
   ===================================================================== */

:root{
  --navy:#1b2a3a;
  --navy-900:#132030;
  --navy-800:#22344a;
  --orange:#f0801a;
  --orange-dark:#d96a0c;
  --kraft:#c8996a;
  --kraft-light:#e9d8bf;
  --paper:#f7f3ec;
  --paper-2:#efe8dc;
  --ink:#16202b;
  --muted:#5b6b79;
  --line:rgba(27,42,58,.12);
  --white:#ffffff;
  --radius:14px;
  --radius-sm:9px;
  --shadow:0 18px 40px -18px rgba(19,32,48,.4);
  --shadow-sm:0 8px 22px -12px rgba(19,32,48,.35);
  --maxw:1200px;
  --ff-display:'Archivo',system-ui,sans-serif;
  --ff-body:'Inter',system-ui,sans-serif;
}

*{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth}
body{
  font-family:var(--ff-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.65;
  font-size:16px;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
img{max-width:100%;display:block}
a{color:inherit;text-decoration:none}
h1,h2,h3,h4{font-family:var(--ff-display);line-height:1.1;font-weight:800;letter-spacing:-.01em}

.container{max-width:var(--maxw);margin:0 auto;padding:0 22px}
.section{padding:88px 0}
.section-alt{background:var(--paper-2)}
.section-navy{background:var(--navy);color:#eaf0f6}

/* Oluklu mukavva "flüt" dokusu — imza öğe */
.flute{
  height:14px;width:100%;
  background:
    repeating-linear-gradient(90deg,
      var(--kraft) 0 6px, var(--kraft-light) 6px 12px);
  opacity:.55;
}
.flute-thin{height:6px}

/* ---------- Eyebrow / etiket (sevkiyat etiketi hissi) ---------- */
.eyebrow{
  display:inline-flex;align-items:center;gap:8px;
  font-family:var(--ff-display);font-weight:700;font-size:.78rem;
  text-transform:uppercase;letter-spacing:.16em;
  color:var(--orange-dark);
  padding:6px 14px;border:1.5px solid rgba(240,128,26,.35);
  border-radius:100px;background:rgba(240,128,26,.06);
}
.section-navy .eyebrow{color:#f5b878;border-color:rgba(245,184,120,.35);background:rgba(245,184,120,.08)}

.section-head{max-width:640px;margin-bottom:46px}
.section-head.center{margin-left:auto;margin-right:auto;text-align:center}
.section-title{font-size:clamp(1.9rem,4vw,2.9rem);margin:16px 0 12px}
.section-sub{color:var(--muted);font-size:1.06rem}
.section-navy .section-sub{color:#a9bbcb}

/* ---------- Butonlar ---------- */
.btn{
  --bg:var(--orange);--fg:#fff;
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--ff-display);font-weight:700;font-size:.98rem;
  letter-spacing:.01em;
  padding:14px 26px;border-radius:100px;border:0;cursor:pointer;
  background:var(--bg);color:var(--fg);
  transition:transform .18s ease,box-shadow .18s ease,background .18s ease;
  box-shadow:0 10px 24px -12px rgba(240,128,26,.7);
}
.btn:hover{transform:translateY(-2px);background:var(--orange-dark)}
.btn .ic{width:18px;height:18px}
.btn-ghost{background:transparent;color:var(--navy);border:1.6px solid var(--line);box-shadow:none}
.btn-ghost:hover{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn-light{background:#fff;color:var(--navy);box-shadow:var(--shadow-sm)}
.btn-light:hover{background:var(--paper);color:var(--navy)}
.btn-lg{padding:16px 32px;font-size:1.05rem}

/* =====================================================================
   AÇILIŞ INTROSU (kutu kapağı açılma animasyonu)
   ===================================================================== */
#intro{
  position:fixed;inset:0;z-index:9999;
  background:radial-gradient(circle at 50% 40%,var(--navy-800),var(--navy-900));
  display:flex;align-items:center;justify-content:center;flex-direction:column;
  transition:opacity .6s ease,visibility .6s ease;
}
#intro.hide{opacity:0;visibility:hidden}
.intro-box{position:relative;width:130px;height:100px;perspective:600px;margin-bottom:28px}
.intro-flap{
  position:absolute;left:15px;right:15px;top:0;height:40px;
  background:linear-gradient(180deg,var(--kraft-light),var(--kraft));
  border:2px solid rgba(0,0,0,.15);transform-origin:top center;
  animation:flapOpen 1s .3s ease forwards;transform:rotateX(0)
}
.intro-flap.r{transform-origin:bottom center;top:auto;bottom:0;animation-name:flapOpenB}
.intro-body{
  position:absolute;inset:18px 0 0;
  background:linear-gradient(180deg,var(--kraft),#b07e4f);
  border:2px solid rgba(0,0,0,.2);border-radius:0 0 6px 6px;
  display:flex;align-items:flex-end;justify-content:center;padding-bottom:8px;
}
.intro-logo{max-width:120px;margin-top:6px;opacity:0;animation:introLogo .7s 1s ease forwards}
.intro-text{
  font-family:var(--ff-display);color:#f5debf;font-weight:600;
  letter-spacing:.14em;text-transform:uppercase;font-size:.9rem;
  opacity:0;animation:introLogo .7s 1.2s ease forwards
}
.intro-bar{width:120px;height:3px;border-radius:3px;background:rgba(255,255,255,.15);margin-top:18px;overflow:hidden}
.intro-bar span{display:block;height:100%;width:0;background:var(--orange);animation:introBar 2.2s ease forwards}
@keyframes flapOpen{to{transform:rotateX(-135deg)}}
@keyframes flapOpenB{to{transform:rotateX(135deg)}}
@keyframes introLogo{to{opacity:1;transform:translateY(0)}}
@keyframes introBar{to{width:100%}}
@media (prefers-reduced-motion:reduce){
  .intro-flap,.intro-logo,.intro-text,.intro-bar span{animation-duration:.01s}
}

/* =====================================================================
   HEADER / NAVBAR
   ===================================================================== */
.topbar{background:var(--navy-900);color:#c3d1de;font-size:.86rem}
.topbar .container{display:flex;justify-content:space-between;align-items:center;height:40px;gap:16px}
.topbar a{color:#c3d1de;transition:color .2s}
.topbar a:hover{color:var(--orange)}
.topbar .tb-left{display:flex;gap:20px;align-items:center}
.topbar .tb-right{display:flex;gap:14px;align-items:center}
.tb-item{display:inline-flex;gap:7px;align-items:center}
.tb-item .ic{width:15px;height:15px;color:var(--orange)}

.site-header{position:sticky;top:0;z-index:900;background:rgba(255,255,255,.92);backdrop-filter:blur(10px);border-bottom:1px solid var(--line);transition:box-shadow .3s}
.site-header.scrolled{box-shadow:var(--shadow-sm)}
.nav{display:flex;align-items:center;justify-content:space-between;height:76px;gap:24px}
.brand img{height:44px}
.nav-menu{display:flex;align-items:center;gap:4px;list-style:none}
.nav-menu a{
  font-family:var(--ff-display);font-weight:600;font-size:.98rem;
  padding:10px 16px;border-radius:8px;color:var(--navy);transition:color .2s,background .2s;
}
.nav-menu a:hover,.nav-menu a.active{color:var(--orange-dark);background:rgba(240,128,26,.08)}
.nav-right{display:flex;align-items:center;gap:14px}
.lang-switch{display:flex;gap:2px;border:1.5px solid var(--line);border-radius:100px;padding:3px;font-family:var(--ff-display);font-weight:700;font-size:.82rem}
.lang-switch a{padding:5px 11px;border-radius:100px;color:var(--muted)}
.lang-switch a.active{background:var(--navy);color:#fff}
.nav-cta{white-space:nowrap}
.hamburger{display:none;background:none;border:0;cursor:pointer;padding:8px}
.hamburger span{display:block;width:26px;height:2.5px;background:var(--navy);margin:5px 0;border-radius:3px;transition:.3s}
.hamburger.open span:nth-child(1){transform:translateY(7.5px) rotate(45deg)}
.hamburger.open span:nth-child(2){opacity:0}
.hamburger.open span:nth-child(3){transform:translateY(-7.5px) rotate(-45deg)}

/* =====================================================================
   SLIDER
   ===================================================================== */
.hero-slider{position:relative;overflow:hidden;background:var(--navy)}
.slides{position:relative;height:clamp(440px,64vh,640px)}
.slide{
  position:absolute;inset:0;opacity:0;visibility:hidden;
  transition:opacity .9s ease;display:flex;align-items:center;
}
.slide.active{opacity:1;visibility:visible}
.slide::before{content:"";position:absolute;inset:0;background:
  linear-gradient(100deg,rgba(19,32,48,.92) 0%,rgba(19,32,48,.6) 45%,rgba(19,32,48,.15) 100%)}
.slide-bg{position:absolute;inset:0;width:100%;height:100%;object-fit:cover}
.slide-inner{position:relative;max-width:640px;color:#fff;z-index:2}
.slide .eyebrow{background:rgba(240,128,26,.16);color:#f5b878;border-color:rgba(245,184,120,.4);margin-bottom:18px}
.slide h2{font-size:clamp(2.1rem,5.2vw,3.7rem);margin-bottom:16px;color:#fff}
.slide p{font-size:1.14rem;color:#d6e0ea;margin-bottom:28px;max-width:520px}
.slider-nav{position:absolute;bottom:26px;left:50%;transform:translateX(-50%);display:flex;gap:10px;z-index:3}
.slider-dot{width:11px;height:11px;border-radius:100px;border:0;background:rgba(255,255,255,.4);cursor:pointer;transition:.25s}
.slider-dot.active{width:34px;background:var(--orange)}
.slider-arrow{
  position:absolute;top:50%;transform:translateY(-50%);z-index:3;
  width:48px;height:48px;border-radius:100px;border:0;cursor:pointer;
  background:rgba(255,255,255,.14);color:#fff;display:grid;place-items:center;
  backdrop-filter:blur(4px);transition:.25s
}
.slider-arrow:hover{background:var(--orange)}
.slider-arrow.prev{left:22px}.slider-arrow.next{right:22px}
.slider-arrow svg{width:22px;height:22px}

/* =====================================================================
   ÖZELLİKLER / ROZETLER
   ===================================================================== */
.features{display:grid;grid-template-columns:repeat(4,1fr);gap:22px}
.feature{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  padding:30px 24px;transition:transform .25s,box-shadow .25s;position:relative;overflow:hidden;
}
.feature::after{content:"";position:absolute;left:0;bottom:0;width:100%;height:4px;background:var(--kraft-light);transition:.25s}
.feature:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.feature:hover::after{background:var(--orange)}
.feature .fic{width:52px;height:52px;border-radius:12px;background:rgba(240,128,26,.1);display:grid;place-items:center;color:var(--orange-dark);margin-bottom:18px}
.feature .fic svg{width:26px;height:26px}
.feature h3{font-size:1.18rem;margin-bottom:8px}
.feature p{color:var(--muted);font-size:.96rem}

/* =====================================================================
   HAKKIMIZDA BLOĞU
   ===================================================================== */
.about-grid{display:grid;grid-template-columns:1.05fr 1fr;gap:56px;align-items:center}
.about-media{position:relative}
.about-media img{border-radius:var(--radius);box-shadow:var(--shadow);width:100%;aspect-ratio:4/3;object-fit:cover;background:#fff}
.about-media .badge{
  position:absolute;right:-14px;bottom:-14px;background:var(--orange);color:#fff;
  padding:18px 22px;border-radius:var(--radius-sm);box-shadow:var(--shadow);
  font-family:var(--ff-display);text-align:center;line-height:1.05
}
.about-media .badge b{display:block;font-size:2rem}
.about-media .badge span{font-size:.82rem;text-transform:uppercase;letter-spacing:.1em}
.about-body p{color:var(--muted);margin-bottom:18px}
.about-list{list-style:none;display:grid;gap:12px;margin:22px 0}
.about-list li{display:flex;gap:12px;align-items:flex-start;font-weight:500}
.about-list .chk{flex:0 0 24px;width:24px;height:24px;border-radius:100px;background:rgba(240,128,26,.14);color:var(--orange-dark);display:grid;place-items:center}
.about-list .chk svg{width:14px;height:14px}

/* =====================================================================
   ÜRÜN KARTLARI
   ===================================================================== */
.products-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:26px}
.product-card{
  background:#fff;border:1px solid var(--line);border-radius:var(--radius);
  overflow:hidden;transition:transform .25s,box-shadow .25s;display:flex;flex-direction:column;
}
.product-card:hover{transform:translateY(-6px);box-shadow:var(--shadow)}
.product-thumb{aspect-ratio:16/11;overflow:hidden;background:var(--paper-2);position:relative}
.product-thumb img{width:100%;height:100%;object-fit:cover;transition:transform .5s}
.product-card:hover .product-thumb img{transform:scale(1.06)}
.product-thumb .ph{width:100%;height:100%;display:grid;place-items:center;color:var(--kraft)}
.product-thumb .ph svg{width:64px;height:64px;opacity:.5}
.product-body{padding:22px;flex:1;display:flex;flex-direction:column}
.product-cat{font-family:var(--ff-display);font-size:.76rem;text-transform:uppercase;letter-spacing:.12em;color:var(--orange-dark);font-weight:700;margin-bottom:8px}
.product-body h3{font-size:1.22rem;margin-bottom:8px}
.product-body p{color:var(--muted);font-size:.95rem;flex:1}
.product-link{margin-top:16px;display:inline-flex;align-items:center;gap:7px;font-family:var(--ff-display);font-weight:700;color:var(--navy)}
.product-link svg{width:16px;height:16px;transition:transform .2s}
.product-card:hover .product-link svg{transform:translateX(4px)}
.product-link:hover{color:var(--orange-dark)}

/* =====================================================================
   HESAPLAMA
   ===================================================================== */
/* form alanları (teklif/iletişim ve hesaplama ortak) */
.calc-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.field{display:flex;flex-direction:column;gap:7px;margin-bottom:6px}
.field.full{grid-column:1/-1}
.field label{font-family:var(--ff-display);font-weight:600;font-size:.9rem;color:var(--navy)}
.field .unit-tag,.field .u{font-weight:400;color:var(--muted);font-size:.82rem}
.field input,.field select,.field textarea{
  font-family:var(--ff-body);font-size:1rem;padding:13px 14px;
  border:1.6px solid var(--line);border-radius:var(--radius-sm);background:#fff;
  color:var(--ink);transition:border-color .2s,box-shadow .2s;width:100%;
}
.field input:focus,.field select:focus,.field textarea:focus{
  outline:0;border-color:var(--orange);box-shadow:0 0 0 3px rgba(240,128,26,.12)
}
.field textarea{min-height:120px;resize:vertical}

/* ===== KOLİ HESAPLAMA (referans birebir) ===== */
.calc-page{--blue:#2f6fed;--blue-dark:#2560d8;--kdv-green:#3a9d6e;
  background:#f7f8fa;padding:58px 0 78px}
.calc-page-head{text-align:center;max-width:760px;margin:0 auto 44px}
.calc-page-head h1{font-family:var(--ff-body);font-weight:500;font-size:2.5rem;color:#3a4a5a;margin-bottom:14px;letter-spacing:.2px}
.calc-page-head p{color:#8492a0;font-size:1.08rem}

.calc-layout{display:grid;grid-template-columns:1fr 400px;gap:48px;align-items:start}
.calc-form{background:transparent}
.calc-dims{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px}

/* form alanları (referans stili) */
.cfield label{display:block;font-family:var(--ff-body);font-weight:400;font-size:.95rem;color:#59677a;margin-bottom:9px}
.cfield label .u{color:#8492a0}
.cfield input,.cfield select{width:100%;height:48px;padding:0 14px;font-family:var(--ff-body);
  font-size:1rem;color:var(--ink);background:#fff;border:1px solid #dce1e7;border-radius:7px;
  transition:border-color .18s,box-shadow .18s}
.cfield input::placeholder{color:#9aa5b1}
.cfield input:focus,.cfield select:focus{outline:0;border-color:var(--blue);box-shadow:0 0 0 3px rgba(47,111,237,.12)}
.cfield select{appearance:none;-webkit-appearance:none;cursor:pointer;
  background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='14' height='14' viewBox='0 0 24 24' fill='none' stroke='%2359677a' stroke-width='2.4'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat:no-repeat;background-position:right 14px center;padding-right:38px}

.calc-divider{height:1px;background:#e6e9ee;margin:28px 0}

/* oluk tipi: sade radyo + görsel (referans) */
.oluk-grid{display:grid;grid-template-columns:1fr 1fr;gap:20px}
.oluk-opt{display:block;cursor:pointer}
.oluk-top{display:flex;align-items:center;gap:11px;margin-bottom:12px}
.oluk-opt input{position:absolute;opacity:0;pointer-events:none}
.oluk-dot{flex:0 0 20px;width:20px;height:20px;border-radius:100px;border:2px solid #b8c2ce;
  background:#fff;display:grid;place-items:center;transition:.18s}
.oluk-dot::after{content:"";width:10px;height:10px;border-radius:100px;background:var(--blue);transform:scale(0);transition:transform .16s}
.oluk-opt input:checked ~ .oluk-dot{border-color:var(--blue)}
.oluk-opt input:checked ~ .oluk-dot::after{transform:scale(1)}
.oluk-name{font-family:var(--ff-body);font-weight:400;color:#3a4a5a;font-size:1rem}
.oluk-img{width:215px;max-width:100%;height:auto;display:block}

.calc-selects{display:grid;grid-template-columns:1fr 1fr;gap:24px}

/* miktar + hesapla (aynı satır) */
.calc-qty .qty-row{display:flex;gap:14px}
.calc-qty input{flex:1}
.calc-btn{flex:0 0 auto;height:48px;padding:0 30px;border:0;border-radius:7px;cursor:pointer;
  background:var(--blue);color:#fff;font-family:var(--ff-body);font-weight:600;font-size:1rem;
  display:inline-flex;align-items:center;justify-content:center;gap:8px;transition:background .18s}
.calc-btn:hover{background:var(--blue-dark)}

/* sağ özet paneli (referans) */
.calc-summary{position:sticky;top:96px}
.cs-head{display:flex;align-items:center;justify-content:space-between;margin-bottom:16px;padding:0 2px}
.cs-head h3{font-family:var(--ff-body);font-weight:500;color:var(--blue);font-size:1.55rem}
.cs-badge{width:30px;height:30px;border-radius:100px;background:var(--blue);color:#fff;
  display:grid;place-items:center;font-family:var(--ff-body);font-weight:600;font-size:.95rem}
.cs-box{background:#fff;border:1px solid #e6e9ee;border-radius:8px;overflow:hidden}
.cs-row{display:flex;justify-content:space-between;align-items:center;padding:15px 18px;
  border-bottom:1px solid #eceef2;font-size:1rem}
.cs-row:last-child{border-bottom:0}
.cs-row span{color:#3a4a5a}
.cs-row b{font-family:var(--ff-body);color:#8492a0;font-weight:400}
.cs-row .cur{font-style:normal;color:var(--orange)}
.cs-kdv{background:#f7f8fa}
.cs-kdv span,.cs-kdv b{color:var(--kdv-green)}
.cs-total b{color:#26313d;font-weight:700}
.cs-note{color:#8492a0;font-size:.95rem;margin-top:16px;line-height:1.55;padding:0 2px}
.cs-quote{width:100%;margin-top:18px;text-decoration:none}

/* =====================================================================
   FORMLAR (teklif / iletişim)
   ===================================================================== */
.form-grid{display:grid;grid-template-columns:1.1fr .9fr;gap:40px;align-items:start}
.form-card{background:#fff;border:1px solid var(--line);border-radius:var(--radius);padding:34px;box-shadow:var(--shadow-sm)}
.info-card{background:var(--navy);color:#dce6f0;border-radius:var(--radius);padding:34px}
.info-card h3{color:#fff;font-size:1.4rem;margin-bottom:20px}
.info-item{display:flex;gap:14px;align-items:flex-start;margin-bottom:22px}
.info-item .iic{flex:0 0 42px;width:42px;height:42px;border-radius:10px;background:rgba(240,128,26,.18);color:#f5b878;display:grid;place-items:center}
.info-item .iic svg{width:20px;height:20px}
.info-item .lbl{font-family:var(--ff-display);font-weight:700;font-size:.8rem;text-transform:uppercase;letter-spacing:.1em;color:#8fa3b5;margin-bottom:2px}
.info-item a,.info-item span{color:#eaf0f6}
.alert{padding:14px 18px;border-radius:var(--radius-sm);margin-bottom:20px;font-weight:500}
.alert-success{background:rgba(46,160,90,.12);color:#1c7a44;border:1px solid rgba(46,160,90,.3)}
.alert-error{background:rgba(210,60,60,.1);color:#b23a3a;border:1px solid rgba(210,60,60,.3)}

/* ---------- Sayfa başlığı (iç sayfalar) ---------- */
.page-hero{background:var(--navy);color:#fff;padding:64px 0;position:relative;overflow:hidden}
.page-hero::after{content:"";position:absolute;inset:0;opacity:.5;
  background:repeating-linear-gradient(90deg,transparent 0 40px,rgba(255,255,255,.02) 40px 41px)}
.page-hero .container{position:relative;z-index:2}
.page-hero h1{font-size:clamp(2rem,4.5vw,3.1rem);margin-bottom:10px}
.breadcrumb{display:flex;gap:8px;align-items:center;color:#a9bbcb;font-size:.9rem}
.breadcrumb a:hover{color:var(--orange)}

/* =====================================================================
   FOOTER
   ===================================================================== */
.site-footer{background:var(--navy-900);color:#aebccb;padding-top:64px}
.footer-top{display:grid;grid-template-columns:1.4fr repeat(3,1fr);gap:40px;padding-bottom:48px}
.footer-brand img{height:48px;margin-bottom:18px}
.footer-brand p{font-size:.95rem;max-width:320px;color:#93a4b5}
.footer-social{display:flex;gap:10px;margin-top:20px}
.footer-social a{width:38px;height:38px;border-radius:9px;background:rgba(255,255,255,.06);display:grid;place-items:center;color:#c3d1de;transition:.2s}
.footer-social a:hover{background:var(--orange);color:#fff}
.footer-social svg{width:18px;height:18px}
.footer-col h4{color:#fff;font-size:1.02rem;margin-bottom:18px;font-family:var(--ff-display);letter-spacing:.02em}
.footer-col ul{list-style:none;display:grid;gap:11px}
.footer-col a{color:#93a4b5;font-size:.94rem;transition:.2s;display:inline-flex;align-items:center;gap:8px}
.footer-col a::before{content:"";width:5px;height:5px;border-radius:100px;background:var(--orange);opacity:0;transition:.2s;margin-right:-4px}
.footer-col a:hover{color:#fff}
.footer-col a:hover::before{opacity:1;margin-right:0}
.footer-bottom{border-top:1px solid rgba(255,255,255,.08);padding:22px 0;display:flex;justify-content:space-between;align-items:center;gap:14px;font-size:.86rem;color:#7e909f}
.footer-bottom a:hover{color:var(--orange)}

/* WhatsApp yüzen buton */
.wa-float{position:fixed;right:22px;bottom:22px;z-index:800;width:58px;height:58px;border-radius:100px;background:#25d366;color:#fff;display:grid;place-items:center;box-shadow:0 12px 28px -8px rgba(37,211,102,.6);transition:transform .2s}
.wa-float:hover{transform:scale(1.08)}
.wa-float svg{width:30px;height:30px}

/* =====================================================================
   RESPONSIVE
   ===================================================================== */
@media (max-width:980px){
  .features{grid-template-columns:1fr 1fr}
  .about-grid,.form-grid{grid-template-columns:1fr;gap:34px}
  .products-grid{grid-template-columns:1fr 1fr}
  .footer-top{grid-template-columns:1fr 1fr}
  .calc-layout{grid-template-columns:1fr;gap:34px}
  .calc-summary{position:static}
}
@media (max-width:760px){
  .section{padding:60px 0}
  .topbar{display:none}
  .nav{height:64px}
  .brand img{height:38px}
  .nav-menu{
    position:fixed;inset:64px 0 auto 0;flex-direction:column;align-items:stretch;
    background:#fff;padding:14px;gap:2px;border-bottom:1px solid var(--line);
    box-shadow:var(--shadow);transform:translateY(-140%);transition:transform .32s ease;
    max-height:calc(100vh - 64px);overflow-y:auto;
  }
  .nav-menu.open{transform:translateY(0)}
  .nav-menu a{padding:14px 16px;font-size:1.05rem}
  .hamburger{display:block}
  .nav-cta{display:none}
  .features,.products-grid,.footer-top{grid-template-columns:1fr}
  .calc-grid{grid-template-columns:1fr}
  .calc-dims{grid-template-columns:1fr}
  .oluk-grid,.calc-selects{grid-template-columns:1fr}
  .calc-qty .qty-row{flex-direction:column}
  .calc-btn{width:100%}
  .calc-page-head h1{font-size:2rem}
  .slider-arrow{display:none}
  .about-media .badge{right:12px}
  .footer-bottom{flex-direction:column;text-align:center}
}