/* ============================================================
   115182200.com — Deep Teal + Copper Design System
   Atlas Copco 3115182200 Accumulator Diaphragm
   ============================================================ */

/* --- CSS Variables --- */
:root {
  --primary: #0D6E6E;
  --primary-dark: #094D4D;
  --primary-light: #E0F2F1;
  --accent: #C06030;
  --accent-dark: #9A4A20;
  --accent-pale: #FFF3EC;
  --bg: #F5F3F0;
  --surface: #ECEAE6;
  --text: #2C2C2C;
  --text-muted: #6B6B6B;
  --success: #2E7D32;
  --danger: #C62828;
  --border: #D5D0CB;
  --white: #FFFFFF;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.08);
  --shadow-md: 0 4px 12px rgba(0,0,0,.1);
  --shadow-lg: 0 8px 30px rgba(0,0,0,.12);
  --radius: 8px;
  --radius-lg: 14px;
  --max-w: 1140px;
  --content-w: 780px;
  --transition: .25s ease;
}

/* --- Reset --- */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:'Inter',system-ui,-apple-system,sans-serif;color:var(--text);background:var(--bg);line-height:1.7;font-size:16px;overflow-x:hidden}
img{max-width:100%;height:auto;display:block}
a{color:var(--primary);text-decoration:none;transition:color var(--transition)}
a:hover{color:var(--accent)}
ul,ol{list-style:none}
button,input,textarea,select{font:inherit;color:inherit}
h1,h2,h3,h4,h5,h6{line-height:1.25;font-weight:700;color:var(--text)}
h1{font-size:clamp(1.9rem,4vw,2.8rem)}
h2{font-size:clamp(1.5rem,3vw,2.1rem)}
h3{font-size:clamp(1.2rem,2.5vw,1.5rem)}
p+p{margin-top:1rem}

/* --- Utility --- */
.container{width:100%;max-width:var(--max-w);margin:0 auto;padding:0 20px}
.content-col{max-width:var(--content-w);margin:0 auto}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);border:0}
.text-center{text-align:center}
.text-muted{color:var(--text-muted)}
.mt-1{margin-top:.5rem}.mt-2{margin-top:1rem}.mt-3{margin-top:1.5rem}.mt-4{margin-top:2rem}
.mb-1{margin-bottom:.5rem}.mb-2{margin-bottom:1rem}.mb-3{margin-bottom:1.5rem}.mb-4{margin-bottom:2rem}

/* --- Buttons --- */
.btn{display:inline-flex;align-items:center;gap:8px;padding:13px 28px;border-radius:var(--radius);font-weight:600;font-size:.95rem;border:none;cursor:pointer;transition:all var(--transition);text-align:center;justify-content:center}
.btn-primary{background:var(--accent);color:var(--white)}
.btn-primary:hover{background:var(--accent-dark);color:var(--white);transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn-outline{background:transparent;color:var(--white);border:2px solid var(--white)}
.btn-outline:hover{background:var(--white);color:var(--primary-dark)}
.btn-teal{background:var(--primary);color:var(--white)}
.btn-teal:hover{background:var(--primary-dark);color:var(--white);transform:translateY(-1px)}
.btn-sm{padding:9px 18px;font-size:.85rem}
.btn-lg{padding:16px 36px;font-size:1.05rem}

/* --- Tag / Badge --- */
.tag{display:inline-block;padding:4px 12px;border-radius:50px;font-size:.78rem;font-weight:600;letter-spacing:.02em}
.tag-teal{background:var(--primary-light);color:var(--primary-dark)}
.tag-copper{background:var(--accent-pale);color:var(--accent-dark)}

/* ============================================================
   TOP NAVIGATION BAR — Teal Background
   ============================================================ */
.top-bar{background:var(--primary-dark);color:rgba(255,255,255,.85);font-size:.82rem;padding:6px 0}
.top-bar .container{display:flex;justify-content:space-between;align-items:center;flex-wrap:wrap;gap:6px}
.top-bar a{color:rgba(255,255,255,.9)}
.top-bar a:hover{color:var(--white)}

.navbar{background:var(--primary);position:sticky;top:0;z-index:1000;box-shadow:0 2px 10px rgba(0,0,0,.15)}
.navbar .container{display:flex;align-items:center;justify-content:space-between;height:64px}
.nav-brand{display:flex;align-items:center;gap:10px;color:var(--white);font-weight:700;font-size:1.15rem;white-space:nowrap}
.nav-brand span{color:rgba(255,255,255,.65);font-weight:400;font-size:.82rem}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{color:rgba(255,255,255,.88);padding:8px 14px;border-radius:var(--radius);font-size:.9rem;font-weight:500;transition:all var(--transition)}
.nav-links a:hover,.nav-links a.active{background:rgba(255,255,255,.12);color:var(--white)}
.nav-links .btn-primary{margin-left:8px}

/* Mobile hamburger */
.nav-toggle{display:none;background:none;border:none;color:var(--white);font-size:1.5rem;cursor:pointer;padding:4px}
.nav-toggle span{display:block;width:24px;height:2px;background:currentColor;margin:5px 0;transition:all .3s ease}

@media(max-width:900px){
  .nav-toggle{display:block}
  .nav-links{display:none;position:absolute;top:64px;left:0;right:0;background:var(--primary-dark);flex-direction:column;padding:16px;gap:4px;box-shadow:var(--shadow-lg)}
  .nav-links.open{display:flex}
  .nav-links a{padding:12px 16px;width:100%}
}

/* ============================================================
   HERO — Teal Gradient
   ============================================================ */
.hero{background:linear-gradient(145deg,var(--primary-dark) 0%,var(--primary) 50%,#0a5858 100%);color:var(--white);padding:70px 0 80px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;top:-50%;right:-20%;width:600px;height:600px;border-radius:50%;background:rgba(192,96,48,.12);pointer-events:none}
.hero::after{content:'';position:absolute;bottom:-40%;left:-10%;width:400px;height:400px;border-radius:50%;background:rgba(255,255,255,.04);pointer-events:none}
.hero .container{position:relative;z-index:1}
.hero h1{color:var(--white);margin-bottom:.5rem}
.hero h1 .accent{color:#F0A878}
.hero p{color:rgba(255,255,255,.85);font-size:1.1rem;max-width:640px}
.hero .tag{margin-bottom:16px}
.hero-actions{display:flex;gap:14px;margin-top:28px;flex-wrap:wrap}

.hero-compact{padding:48px 0 52px}
.hero-compact h1{font-size:clamp(1.5rem,3.5vw,2.2rem)}

/* ============================================================
   SECTIONS
   ============================================================ */
.section{padding:60px 0}
.section-alt{background:var(--surface)}
.section-teal{background:var(--primary);color:var(--white)}
.section-teal h2,.section-teal h3{color:var(--white)}
.section-teal p{color:rgba(255,255,255,.85)}
.section-title{text-align:center;margin-bottom:40px}
.section-title h2{margin-bottom:10px}
.section-title p{color:var(--text-muted);max-width:600px;margin:0 auto}

/* ============================================================
   CARDS
   ============================================================ */
.card{background:var(--white);border-radius:var(--radius-lg);padding:28px;box-shadow:var(--shadow-sm);border:1px solid var(--border);transition:all var(--transition)}
.card:hover{box-shadow:var(--shadow-md);transform:translateY(-2px)}
.card-icon{width:52px;height:52px;border-radius:12px;display:flex;align-items:center;justify-content:center;font-size:1.5rem;margin-bottom:16px;background:var(--primary-light);color:var(--primary)}
.card h3{margin-bottom:8px}
.card p{color:var(--text-muted);font-size:.93rem}

.card-grid{display:grid;gap:20px}
.card-grid-2{grid-template-columns:repeat(auto-fit,minmax(300px,1fr))}
.card-grid-3{grid-template-columns:repeat(auto-fit,minmax(260px,1fr))}
.card-grid-4{grid-template-columns:repeat(auto-fit,minmax(230px,1fr))}

/* Feature card accent line */
.card-accent{border-top:3px solid var(--accent)}

/* COP model cards */
.model-card{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);padding:20px;text-align:center;transition:all var(--transition)}
.model-card:hover{border-color:var(--primary);box-shadow:var(--shadow-md)}
.model-card h4{color:var(--primary);margin-bottom:6px}
.model-card p{font-size:.85rem;color:var(--text-muted)}

/* ============================================================
   SPECS TABLE
   ============================================================ */
.specs-table{width:100%;border-collapse:collapse;background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.specs-table th,.specs-table td{padding:14px 20px;text-align:left;border-bottom:1px solid var(--border)}
.specs-table thead th{background:var(--primary);color:var(--white);font-weight:600;font-size:.88rem;text-transform:uppercase;letter-spacing:.04em}
.specs-table tbody tr:last-child td{border-bottom:none}
.specs-table tbody tr:hover{background:var(--primary-light)}
.specs-table .label-col{font-weight:600;color:var(--primary-dark);width:40%;white-space:nowrap}

/* ============================================================
   BREADCRUMBS
   ============================================================ */
.breadcrumbs{padding:14px 0;font-size:.85rem}
.breadcrumbs ol{display:flex;flex-wrap:wrap;gap:4px;align-items:center}
.breadcrumbs li::after{content:'›';margin-left:8px;color:var(--text-muted)}
.breadcrumbs li:last-child::after{content:''}
.breadcrumbs a{color:var(--text-muted)}
.breadcrumbs a:hover{color:var(--primary)}
.breadcrumbs li:last-child{color:var(--text);font-weight:500}

/* ============================================================
   FAQ ACCORDION
   ============================================================ */
.faq-item{background:var(--white);border:1px solid var(--border);border-radius:var(--radius);margin-bottom:10px;overflow:hidden}
.faq-question{width:100%;display:flex;justify-content:space-between;align-items:center;padding:18px 22px;background:none;border:none;cursor:pointer;font-weight:600;font-size:1rem;text-align:left;color:var(--text);transition:background var(--transition)}
.faq-question:hover{background:var(--primary-light)}
.faq-question::after{content:'+';font-size:1.4rem;font-weight:300;color:var(--primary);transition:transform .3s ease;flex-shrink:0;margin-left:16px}
.faq-item.open .faq-question::after{content:'\2212'}
.faq-answer{max-height:0;overflow:hidden;transition:max-height .35s ease}
.faq-answer-inner{padding:0 22px 20px;color:var(--text-muted);font-size:.93rem;line-height:1.7}

/* ============================================================
   CTA SECTION
   ============================================================ */
.cta-section{background:linear-gradient(135deg,var(--primary-dark),var(--primary));padding:60px 0;text-align:center;color:var(--white)}
.cta-section h2{color:var(--white);margin-bottom:12px}
.cta-section p{color:rgba(255,255,255,.85);margin-bottom:28px;max-width:600px;margin-left:auto;margin-right:auto}
.cta-actions{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}

/* ============================================================
   STICKY BOTTOM CTA BAR (product pages)
   ============================================================ */
.sticky-cta{position:fixed;bottom:0;left:0;right:0;background:var(--white);border-top:2px solid var(--accent);padding:12px 0;z-index:999;box-shadow:0 -4px 16px rgba(0,0,0,.1);transform:translateY(100%);transition:transform .4s ease}
.sticky-cta.visible{transform:translateY(0)}
.sticky-cta .container{display:flex;align-items:center;justify-content:space-between;gap:16px;flex-wrap:wrap}
.sticky-cta .cta-text{font-weight:600;font-size:.95rem}
.sticky-cta .cta-text span{color:var(--text-muted);font-weight:400;font-size:.85rem;display:block}
.sticky-cta .cta-buttons{display:flex;gap:10px;flex-wrap:wrap}

@media(max-width:600px){
  .sticky-cta .container{justify-content:center;text-align:center}
  .sticky-cta .cta-text span{display:none}
}

/* ============================================================
   CONTACT FORM
   ============================================================ */
.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:18px}
.form-group{display:flex;flex-direction:column;gap:6px}
.form-group.full{grid-column:1/-1}
.form-label{font-weight:600;font-size:.88rem;color:var(--text)}
.form-input,.form-textarea,.form-select{padding:12px 16px;border:1px solid var(--border);border-radius:var(--radius);background:var(--white);transition:border-color var(--transition),box-shadow var(--transition);font-size:.95rem}
.form-input:focus,.form-textarea:focus,.form-select:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px rgba(13,110,110,.12)}
.form-textarea{resize:vertical;min-height:120px}
.form-hint{font-size:.8rem;color:var(--text-muted)}
.honeypot{position:absolute;left:-9999px}

.form-status{padding:14px 20px;border-radius:var(--radius);margin-top:16px;font-weight:500;display:none}
.form-status.success{display:block;background:#e8f5e9;color:var(--success);border:1px solid #a5d6a7}
.form-status.error{display:block;background:#ffebee;color:var(--danger);border:1px solid #ef9a9a}

@media(max-width:600px){
  .form-grid{grid-template-columns:1fr}
}

/* ============================================================
   ARTICLE CONTENT (centered single-column)
   ============================================================ */
.article-body{max-width:var(--content-w);margin:0 auto;padding-bottom:100px}
.article-body h2{margin:2.2rem 0 .8rem;padding-top:.5rem;border-bottom:2px solid var(--primary-light);padding-bottom:.5rem}
.article-body h3{margin:1.8rem 0 .6rem;color:var(--primary-dark)}
.article-body p{margin-bottom:1rem;font-size:1.02rem}
.article-body ul,.article-body ol{margin:1rem 0 1.5rem 1.5rem}
.article-body ul{list-style:disc}
.article-body ol{list-style:decimal}
.article-body li{margin-bottom:.4rem;color:var(--text-muted)}
.article-body strong{color:var(--text)}
.article-body blockquote{border-left:4px solid var(--accent);padding:16px 24px;background:var(--accent-pale);border-radius:0 var(--radius) var(--radius) 0;margin:1.5rem 0;font-style:italic}
.article-body .info-box{background:var(--primary-light);border:1px solid #b2dfdb;border-radius:var(--radius);padding:20px 24px;margin:1.5rem 0}
.article-body .info-box h4{color:var(--primary-dark);margin-bottom:8px}
.article-body .warn-box{background:#fff8e1;border:1px solid #ffe082;border-radius:var(--radius);padding:20px 24px;margin:1.5rem 0}

/* ============================================================
   COMPARISON TABLE
   ============================================================ */
.comparison-table{width:100%;border-collapse:collapse;margin:1.5rem 0}
.comparison-table th,.comparison-table td{padding:12px 16px;border:1px solid var(--border);text-align:left;font-size:.92rem}
.comparison-table thead th{background:var(--primary);color:var(--white)}
.comparison-table tbody tr:nth-child(even){background:var(--surface)}
.comparison-table .check{color:var(--success);font-weight:700}
.comparison-table .cross{color:var(--danger)}

/* ============================================================
   CROSS-REF TABLE
   ============================================================ */
.xref-table{width:100%;border-collapse:collapse;margin:1.5rem 0;background:var(--white);border-radius:var(--radius-lg);overflow:hidden;box-shadow:var(--shadow-sm)}
.xref-table th,.xref-table td{padding:12px 16px;border-bottom:1px solid var(--border);font-size:.9rem}
.xref-table thead th{background:var(--primary-dark);color:var(--white);font-weight:600}
.xref-table tbody tr:hover{background:var(--primary-light)}
.xref-table .highlight{font-weight:700;color:var(--accent-dark)}

/* ============================================================
   FOOTER
   ============================================================ */
.footer{background:var(--primary-dark);color:rgba(255,255,255,.8);padding:50px 0 0}
.footer h4{color:var(--white);margin-bottom:14px;font-size:1rem}
.footer a{color:rgba(255,255,255,.7);transition:color var(--transition)}
.footer a:hover{color:var(--white)}
.footer ul li{margin-bottom:8px;font-size:.9rem}
.footer-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:30px}
.footer-bottom{margin-top:40px;padding:20px 0;border-top:1px solid rgba(255,255,255,.12);text-align:center;font-size:.82rem;color:rgba(255,255,255,.5)}

/* ============================================================
   404 PAGE
   ============================================================ */
.error-page{min-height:60vh;display:flex;align-items:center;justify-content:center;text-align:center;padding:60px 20px}
.error-page h1{font-size:5rem;color:var(--primary);margin-bottom:0}
.error-page h2{margin-bottom:16px}

/* ============================================================
   WHATSAPP FLOAT
   ============================================================ */
.whatsapp-float{position:fixed;bottom:85px;right:24px;width:56px;height:56px;background:#25D366;color:var(--white);border-radius:50%;display:flex;align-items:center;justify-content:center;font-size:1.6rem;box-shadow:0 4px 14px rgba(37,211,102,.4);z-index:998;transition:transform var(--transition)}
.whatsapp-float:hover{transform:scale(1.1);color:var(--white)}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media(max-width:768px){
  .hero{padding:48px 0 56px}
  .section{padding:40px 0}
  .card{padding:22px}
  .footer-grid{grid-template-columns:1fr 1fr}
}
@media(max-width:480px){
  body{font-size:15px}
  .container{padding:0 16px}
  .hero{padding:36px 0 44px}
  .btn{padding:11px 22px;font-size:.9rem}
  .footer-grid{grid-template-columns:1fr}
}

/* ============================================================
   PRINT
   ============================================================ */
@media print{
  .navbar,.top-bar,.sticky-cta,.whatsapp-float,.footer{display:none}
  body{background:#fff;color:#000}
  .hero{background:var(--primary-light)!important;color:var(--text)!important;padding:20px 0}
  .hero h1,.hero p{color:var(--text)!important}
}