/* ============================================================
   Welder Safety Goggle Helmet — Global Stylesheet
   Modern Industrial / Japanese-Inspired Design
   Dark Graphite · Steel · Safety Orange
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&family=Noto+Sans+JP:wght@300;400;500;700&display=swap');

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

:root{
  --g900:#111214;--g800:#1a1c20;--g700:#222529;--g600:#2d3035;--g500:#3a3e45;
  --s400:#515861;--s300:#737b87;--s200:#a8b0bc;--s100:#d4d9e0;
  --o600:#c45200;--o500:#e06000;--o400:#ff7012;--o300:#ff8f3f;
  --oglow:rgba(255,112,18,.15);--oborder:rgba(255,112,18,.32);
  --white:#ffffff;--tp:#e8eaed;--ts:#a8b0bc;--tm:#737b87;
  --border:rgba(255,255,255,.07);--card:rgba(255,255,255,.03);--cardh:rgba(255,255,255,.06);
  --rsm:6px;--rmd:12px;--rlg:20px;
  --sh:0 4px 24px rgba(0,0,0,.45);
  --tr:.25s cubic-bezier(.4,0,.2,1);
  --font:'Inter','Noto Sans JP',system-ui,sans-serif;
  --mw:1200px
}

html{scroll-behavior:smooth;font-size:16px}
body{font-family:var(--font);background:var(--g900);color:var(--tp);line-height:1.7;min-height:100vh;-webkit-font-smoothing:antialiased}
img{max-width:100%;height:auto;display:block;border-radius:var(--rmd)}
a{color:var(--o400);text-decoration:none;transition:color var(--tr)}
a:hover{color:var(--o300)}
ul,ol{padding-left:1.4em}

.container{width:100%;max-width:var(--mw);margin:0 auto;padding:0 1.25rem}

/* Typography */
h1,h2,h3,h4,h5{font-weight:700;line-height:1.25;color:var(--white);letter-spacing:-.02em}
h1{font-size:clamp(2rem,5vw,3.25rem)}
h2{font-size:clamp(1.5rem,3.5vw,2.25rem)}
h3{font-size:clamp(1.1rem,2.5vw,1.45rem)}
h4{font-size:1.05rem}
p{color:var(--ts);margin-bottom:1rem}
p:last-child{margin-bottom:0}

.section-label{display:inline-block;font-size:.7rem;font-weight:700;letter-spacing:.18em;text-transform:uppercase;color:var(--o400);margin-bottom:.85rem;padding:.25rem .75rem;border:1px solid var(--oborder);border-radius:100px;background:var(--oglow)}
.section-title{margin-bottom:1rem}
.section-desc{font-size:1.05rem;color:var(--ts);max-width:640px}
.text-center{text-align:center}
.text-center .section-desc{margin:0 auto}

.orange-line{width:52px;height:3px;background:linear-gradient(90deg,var(--o500),var(--o300));border-radius:2px;margin:1rem 0 1.5rem}
.text-center .orange-line{margin:1rem auto 1.5rem}

/* Buttons */
.btn{display:inline-flex;align-items:center;gap:.5rem;padding:.78rem 1.75rem;border-radius:var(--rsm);font-size:.92rem;font-weight:600;letter-spacing:.03em;cursor:pointer;border:none;transition:all var(--tr);white-space:nowrap}
.btn-primary{background:linear-gradient(135deg,var(--o500),var(--o600));color:var(--white);box-shadow:0 4px 18px rgba(224,96,0,.4)}
.btn-primary:hover{background:linear-gradient(135deg,var(--o400),var(--o500));color:var(--white);transform:translateY(-2px);box-shadow:0 6px 24px rgba(224,96,0,.55)}
.btn-outline{background:transparent;color:var(--tp);border:1.5px solid var(--border)}
.btn-outline:hover{border-color:var(--o400);color:var(--o300);background:var(--oglow);transform:translateY(-2px)}

/* Navbar */
.navbar{position:sticky;top:0;z-index:100;background:rgba(17,18,20,.93);backdrop-filter:blur(18px);-webkit-backdrop-filter:blur(18px);border-bottom:1px solid var(--border)}
.nav-inner{display:flex;align-items:center;justify-content:space-between;height:68px;gap:1.5rem}
.nav-logo{display:flex;align-items:center;gap:.6rem;font-weight:800;font-size:.95rem;color:var(--white);letter-spacing:-.01em;flex-shrink:0}
.logo-icon{width:38px;height:38px;background:linear-gradient(135deg,var(--o500),var(--o600));border-radius:var(--rsm);display:flex;align-items:center;justify-content:center;font-size:1.15rem;box-shadow:0 2px 10px rgba(224,96,0,.4)}
.logo-text{display:none}
@media(min-width:500px){.logo-text{display:inline}}
.nav-links{display:none;list-style:none;gap:.2rem;align-items:center}
@media(min-width:900px){.nav-links{display:flex}}
.nav-links a{display:block;padding:.42rem .72rem;font-size:.83rem;font-weight:500;color:var(--ts);border-radius:var(--rsm);transition:all var(--tr)}
.nav-links a:hover,.nav-links a.active{color:var(--o300);background:var(--oglow)}
.nav-cta{display:none}
@media(min-width:640px){.nav-cta{display:flex}}
.nav-toggle{display:flex;flex-direction:column;gap:5px;cursor:pointer;padding:6px;border:none;background:transparent}
.nav-toggle span{display:block;width:24px;height:2px;background:var(--ts);border-radius:2px;transition:all var(--tr)}
@media(min-width:900px){.nav-toggle{display:none}}
.mobile-nav{display:none;position:fixed;inset:0;z-index:99;background:rgba(17,18,20,.97);flex-direction:column;align-items:center;justify-content:center;gap:.5rem}
.mobile-nav.open{display:flex}
.mobile-nav a{font-size:1.2rem;font-weight:600;padding:.7rem 2rem;color:var(--tp);border-radius:var(--rsm);transition:all var(--tr)}
.mobile-nav a:hover{color:var(--o400)}
.mnav-close{position:absolute;top:1.5rem;right:1.5rem;background:transparent;border:none;color:var(--ts);font-size:1.8rem;cursor:pointer;transition:color var(--tr);line-height:1}
.mnav-close:hover{color:var(--o400)}

/* Hero */
.hero{position:relative;overflow:hidden;padding:5rem 0 4rem;background:radial-gradient(ellipse 80% 60% at 50% 0%,rgba(255,112,18,.08) 0%,transparent 70%)}
.hero::before{content:'';position:absolute;top:0;left:0;right:0;height:1px;background:linear-gradient(90deg,transparent,var(--o500),transparent)}
.hero-grid{display:grid;gap:3rem;align-items:center}
@media(min-width:768px){.hero-grid{grid-template-columns:1fr 1fr}}
.hero-badge{display:inline-flex;align-items:center;gap:.5rem;font-size:.72rem;font-weight:700;letter-spacing:.15em;text-transform:uppercase;color:var(--o400);margin-bottom:1.25rem}
.hero-badge::before{content:'';display:inline-block;width:8px;height:8px;background:var(--o400);border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1;transform:scale(1)}50%{opacity:.5;transform:scale(1.3)}}
.hero h1{margin-bottom:1.25rem}
.hero h1 em{font-style:normal;color:var(--o400)}
.hero-sub{font-size:1.05rem;color:var(--ts);margin-bottom:2rem;max-width:520px}
.hero-btns{display:flex;flex-wrap:wrap;gap:.85rem}
.hero-stats{display:flex;gap:2rem;margin-top:2.5rem;padding-top:2rem;border-top:1px solid var(--border);flex-wrap:wrap}
.stat-num{font-size:1.6rem;font-weight:800;color:var(--o400);display:block;line-height:1;margin-bottom:.25rem}
.stat-lbl{font-size:.75rem;color:var(--tm);letter-spacing:.05em}
.hero-img{position:relative}
.hero-img img{width:100%;max-height:500px;object-fit:cover;border-radius:var(--rlg);border:1px solid var(--border);box-shadow:var(--sh)}
.hero-badge-img{position:absolute;bottom:1.25rem;left:1.25rem;background:rgba(17,18,20,.9);border:1px solid var(--oborder);border-radius:var(--rmd);padding:.65rem 1rem;backdrop-filter:blur(10px);display:flex;align-items:center;gap:.65rem}
.hbi-icon{font-size:1.4rem}
.hbi-text{font-size:.78rem;font-weight:600;color:var(--tp);line-height:1.3}
.hbi-sub{font-size:.65rem;color:var(--tm)}

/* Section */
.section{padding:5rem 0}
.section-alt{background:var(--g800)}
.section-dark{background:var(--g700)}

/* Cards */
.cards-grid{display:grid;gap:1.5rem;grid-template-columns:1fr}
@media(min-width:540px){.cards-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:900px){.cards-grid{grid-template-columns:repeat(3,1fr)}}
@media(min-width:1100px){.cards-grid.c4{grid-template-columns:repeat(4,1fr)}}
.card{background:var(--card);border:1px solid var(--border);border-radius:var(--rmd);padding:1.75rem;transition:all var(--tr);position:relative;overflow:hidden}
.card::before{content:'';position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--o500),transparent);opacity:0;transition:opacity var(--tr)}
.card:hover{background:var(--cardh);border-color:var(--oborder);transform:translateY(-3px);box-shadow:var(--sh)}
.card:hover::before{opacity:1}
.card-icon{width:50px;height:50px;background:var(--oglow);border:1px solid var(--oborder);border-radius:var(--rsm);display:flex;align-items:center;justify-content:center;font-size:1.45rem;margin-bottom:1.1rem}
.card h3{font-size:1rem;margin-bottom:.6rem}
.card p{font-size:.87rem;color:var(--tm);margin-bottom:0}
.card-link{display:inline-flex;align-items:center;gap:.35rem;font-size:.82rem;font-weight:600;color:var(--o400);margin-top:1rem}
.card-link:hover{color:var(--o300);gap:.6rem}

/* Feature Row */
.feature-row{display:grid;gap:3rem;align-items:center}
@media(min-width:768px){.feature-row{grid-template-columns:1fr 1fr}}
@media(min-width:768px){.feature-row.rev .f-img{order:2}.feature-row.rev .f-content{order:1}}
.f-img img{width:100%;object-fit:cover;max-height:420px;border:1px solid var(--border);box-shadow:var(--sh)}
.feature-list{list-style:none;padding:0;display:flex;flex-direction:column;gap:.85rem;margin:1.5rem 0}
.feature-list li{display:flex;align-items:flex-start;gap:.75rem;font-size:.92rem;color:var(--ts)}
.feature-list li::before{content:'▸';color:var(--o400);font-size:.8rem;flex-shrink:0;margin-top:.2rem}

/* Info box */
.info-box{background:var(--oglow);border:1px solid var(--oborder);border-radius:var(--rmd);padding:1.25rem 1.5rem;margin:1.5rem 0}
.info-box p{color:var(--ts);font-size:.9rem;margin:0}
.info-box strong{color:var(--o300)}

/* Notice */
.notice{display:flex;gap:.85rem;background:rgba(255,255,255,.03);border:1px solid var(--border);border-left:3px solid var(--o400);border-radius:var(--rsm);padding:1rem 1.25rem;margin:1.25rem 0}
.notice-icon{font-size:1.15rem;flex-shrink:0}
.notice p{font-size:.86rem;color:var(--tm);margin:0}

/* Steps */
.steps{display:flex;flex-direction:column;gap:1.25rem}
.step{display:flex;gap:1.25rem;align-items:flex-start}
.step-num{width:40px;height:40px;flex-shrink:0;background:var(--g600);border:1px solid var(--oborder);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:.8rem;font-weight:700;color:var(--o400)}
.step-content h4{font-size:.95rem;margin-bottom:.3rem}
.step-content p{font-size:.86rem;margin:0}

/* FAQ */
.faq-list{display:flex;flex-direction:column;gap:.85rem}
.faq-item{background:var(--card);border:1px solid var(--border);border-radius:var(--rmd);overflow:hidden}
.faq-q{display:flex;justify-content:space-between;align-items:center;padding:1.2rem 1.5rem;cursor:pointer;font-weight:600;font-size:.95rem;color:var(--tp);gap:1rem;transition:background var(--tr);user-select:none}
.faq-q:hover{background:var(--cardh)}
.faq-arrow{font-size:1.3rem;color:var(--o400);flex-shrink:0;transition:transform var(--tr);line-height:1}
.faq-item.open .faq-arrow{transform:rotate(45deg)}
.faq-a{display:none;padding:.2rem 1.5rem 1.25rem;font-size:.9rem;color:var(--tm);border-top:1px solid var(--border)}
.faq-item.open .faq-a{display:block}

/* Table */
.table-wrap{overflow-x:auto}
.data-table{width:100%;border-collapse:collapse;font-size:.88rem}
.data-table th{text-align:left;padding:.85rem 1.1rem;background:var(--g600);color:var(--o300);font-weight:600;font-size:.74rem;letter-spacing:.08em;text-transform:uppercase;border-bottom:1px solid var(--border)}
.data-table td{padding:.85rem 1.1rem;border-bottom:1px solid var(--border);color:var(--ts)}
.data-table tr:hover td{background:var(--cardh)}
.tag{display:inline-block;padding:.18rem .65rem;border-radius:100px;font-size:.72rem;font-weight:600}
.tag-g{background:#0e3b2c;color:#a7f3d0}
.tag-o{background:var(--oglow);color:var(--o300)}
.tag-s{background:rgba(255,255,255,.06);color:var(--s200)}

/* Form */
.form-grid{display:grid;gap:1rem}
@media(min-width:540px){.form-grid{grid-template-columns:1fr 1fr}}
.form-group{display:flex;flex-direction:column;gap:.45rem}
.form-group.full{grid-column:1/-1}
label{font-size:.78rem;font-weight:600;color:var(--ts);letter-spacing:.05em;text-transform:uppercase}
input,textarea,select{background:var(--g600);border:1px solid var(--border);border-radius:var(--rsm);padding:.75rem 1rem;color:var(--tp);font-family:var(--font);font-size:.92rem;transition:border-color var(--tr);width:100%}
input:focus,textarea:focus,select:focus{outline:none;border-color:var(--o400);box-shadow:0 0 0 3px rgba(255,112,18,.12)}
textarea{resize:vertical;min-height:130px}
select option{background:var(--g700)}

/* Quote */
.quote-block{border-left:3px solid var(--o400);padding:1rem 1.5rem;background:var(--card);border-radius:0 var(--rmd) var(--rmd) 0;margin:1.5rem 0}
.quote-block p{font-size:1rem;font-style:italic;color:var(--ts);margin-bottom:.5rem}
.quote-block cite{font-size:.8rem;color:var(--o300);font-style:normal;font-weight:600}

/* Stats strip */
.stat-strip{display:grid;grid-template-columns:repeat(2,1fr);gap:1px;background:var(--border);border:1px solid var(--border);border-radius:var(--rmd);overflow:hidden}
@media(min-width:640px){.stat-strip{grid-template-columns:repeat(4,1fr)}}
.stat-cell{background:var(--g800);padding:1.75rem 1.25rem;text-align:center}
.sc-num{font-size:2rem;font-weight:800;color:var(--o400);display:block;line-height:1;margin-bottom:.35rem}
.sc-lbl{font-size:.78rem;color:var(--tm)}

/* Breadcrumb */
.breadcrumb{display:flex;align-items:center;gap:.5rem;font-size:.78rem;color:var(--tm);padding:1.1rem 0;flex-wrap:wrap}
.breadcrumb a{color:var(--tm)}
.breadcrumb a:hover{color:var(--o300)}
.breadcrumb .sep{color:var(--s400)}
.breadcrumb .cur{color:var(--o300);font-weight:500}

/* Page header */
.page-header{background:linear-gradient(135deg,var(--g800) 0%,var(--g700) 100%);border-bottom:1px solid var(--border);padding:3rem 0 2.5rem;position:relative;overflow:hidden}
.page-header::after{content:'';position:absolute;top:0;right:0;width:300px;height:100%;background:radial-gradient(ellipse at right center,rgba(255,112,18,.06),transparent);pointer-events:none}
.page-header h1{font-size:clamp(1.75rem,4vw,2.5rem)}
.page-header p{max-width:560px}

/* Image gallery */
.img-gallery{display:grid;gap:1.25rem}
@media(min-width:540px){.img-gallery{grid-template-columns:1fr 1fr}}
.img-gallery img{width:100%;object-fit:cover;height:260px}

/* CTA Banner */
.cta-banner{background:linear-gradient(135deg,var(--g700) 0%,var(--g600) 100%);border:1px solid var(--border);border-top:2px solid var(--o500);border-radius:var(--rlg);padding:3rem 2rem;text-align:center}
.cta-banner h2{margin-bottom:.75rem}
.cta-banner p{max-width:540px;margin:0 auto 1.75rem}
.cta-btns{display:flex;flex-wrap:wrap;gap:1rem;justify-content:center}

/* Disclaimer */
.disclaimer{background:var(--g700);border:1px solid var(--border);border-radius:var(--rmd);padding:1.25rem 1.6rem;font-size:.82rem;color:var(--tm);line-height:1.6}
.disclaimer strong{color:var(--s200)}

/* Footer */
.footer{background:var(--g800);border-top:1px solid var(--border);padding:4rem 0 0}
.footer-grid{display:grid;gap:2.5rem;grid-template-columns:1fr;margin-bottom:3rem}
@media(min-width:640px){.footer-grid{grid-template-columns:repeat(2,1fr)}}
@media(min-width:1000px){.footer-grid{grid-template-columns:2fr 1fr 1fr 1.5fr}}
.footer-brand p{font-size:.85rem;color:var(--tm);max-width:280px;margin-top:.75rem}
.footer-col h4{font-size:.78rem;font-weight:700;letter-spacing:.1em;text-transform:uppercase;color:var(--s200);margin-bottom:1rem}
.footer-col ul{list-style:none;padding:0;display:flex;flex-direction:column;gap:.55rem}
.footer-col ul li a{font-size:.85rem;color:var(--tm);transition:color var(--tr)}
.footer-col ul li a:hover{color:var(--o300)}
.fc-item{display:flex;gap:.5rem;align-items:flex-start;font-size:.85rem;color:var(--tm);margin-bottom:.6rem}
.fc-item .ico{flex-shrink:0;font-size:.95rem;margin-top:.05rem}
.footer-bottom{border-top:1px solid var(--border);padding:1.5rem 0;display:flex;flex-wrap:wrap;gap:1rem;align-items:center;justify-content:space-between}
.footer-bottom p{font-size:.78rem;color:var(--tm);margin:0}
.fb-links{display:flex;gap:1.25rem;flex-wrap:wrap}
.fb-links a{font-size:.78rem;color:var(--tm)}
.fb-links a:hover{color:var(--o300)}

/* Utility */
.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}
.gap-top{margin-top:3rem}
.highlight{color:var(--o400)}
.pill{display:inline-block;padding:.2rem .7rem;border-radius:100px;font-size:.72rem;font-weight:700;background:var(--oglow);border:1px solid var(--oborder);color:var(--o300)}

@keyframes fadeUp{from{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}
.fade-up{animation:fadeUp .55s ease both}
.d1{animation-delay:.1s}.d2{animation-delay:.2s}.d3{animation-delay:.3s}

::-webkit-scrollbar{width:6px}
::-webkit-scrollbar-track{background:var(--g900)}
::-webkit-scrollbar-thumb{background:var(--g500);border-radius:3px}
::-webkit-scrollbar-thumb:hover{background:var(--o500)}