/* =========================================================
   VehCalc – Global Stylesheet (Tailwind complement)
   Brand Colors:  Veh = #1f2937 (dark gray), Calc = #1e40af (navy)
   ========================================================= */
:root{
  --vc-veh:#1f2937;
  --vc-calc:#1e40af;
  --vc-navy:#1e3a8a;
  --vc-teal:#0f766e;
  --vc-gold:#a16207;
  --vc-sky:#0ea5e9;
  --vc-ink:#0f172a;
  --vc-paper:#f8fafc;
  --vc-border:#e2e8f0;
  --vc-shadow:0 1px 3px rgba(15,23,42,.06),0 10px 30px -12px rgba(30,58,138,.18);
  --vc-radius:12px;
  --vc-font-head:"Plus Jakarta Sans","Inter",system-ui,sans-serif;
  --vc-font-body:"Inter",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
}
*{box-sizing:border-box}
html{scroll-behavior:smooth;-webkit-text-size-adjust:100%}
body{font-family:var(--vc-font-body);color:var(--vc-ink);background:#fff;line-height:1.65}
h1,h2,h3,h4,h5,.vc-heading{font-family:var(--vc-font-head);font-weight:700;letter-spacing:-.01em;color:var(--vc-ink)}
h1{font-size:clamp(1.9rem,2.8vw,2.6rem);line-height:1.15}
h2{font-size:clamp(1.5rem,2vw,1.9rem);line-height:1.25;margin-top:2.4rem;margin-bottom:1rem}
h3{font-size:clamp(1.15rem,1.4vw,1.35rem);margin-top:1.8rem;margin-bottom:.6rem;color:var(--vc-navy)}
p{margin:0 0 1.1rem}
a{color:var(--vc-navy);text-decoration:underline;text-underline-offset:3px;text-decoration-thickness:1px}
a:hover{color:#1d4ed8;text-decoration-thickness:2px}

/* ============ Brand Logo (Veh two-tone) ============ */
.vc-logo{display:inline-flex;align-items:baseline;font-family:var(--vc-font-head);font-weight:800;font-size:1.5rem;letter-spacing:-.02em;line-height:1;text-decoration:none}
.vc-logo .veh{color:var(--vc-veh)}
.vc-logo .calc{color:var(--vc-calc)}
.vc-logo:hover{text-decoration:none;transform:translateY(-1px);transition:transform .25s ease}

/* ============ Page load reveal ============ */
/* NOTE: Default visible to guard against missing animations.js loader.
   Progressive enhancement: JS adds .vc-reveal-init before DOM paint then IntersectionObserver fades in */
.vc-reveal{opacity:1;transform:none;transition:opacity .7s ease,transform .7s ease}
html.vc-js-ok .vc-reveal{opacity:0;transform:translateY(16px)}
html.vc-js-ok .vc-reveal.is-in{opacity:1;transform:none}
@media (prefers-reduced-motion:reduce){.vc-reveal,html.vc-js-ok .vc-reveal{opacity:1;transform:none;transition:none}}

/* ============ Navigation underline animation ============ */
.vc-nav a.nav-link{position:relative;text-decoration:none;color:#334155;font-weight:500;padding:.4rem .1rem;display:inline-block}
.vc-nav a.nav-link::after{content:"";position:absolute;left:0;right:0;bottom:0;height:2px;background:linear-gradient(90deg,var(--vc-navy),var(--vc-teal));transform-origin:center;transform:scaleX(0);transition:transform .35s ease;border-radius:2px}
.vc-nav a.nav-link:hover::after,.vc-nav a.nav-link.is-active::after{transform:scaleX(1)}
.vc-nav a.nav-link:hover{color:var(--vc-navy)}

/* ============ Gradient border card hover ============ */
.vc-card{position:relative;background:#fff;border-radius:var(--vc-radius);border:1px solid var(--vc-border);padding:1.25rem;box-shadow:var(--vc-shadow);transition:transform .35s ease,box-shadow .35s ease;overflow:hidden;isolation:isolate}
.vc-card::before{content:"";position:absolute;inset:0;border-radius:inherit;padding:1px;background:linear-gradient(135deg,rgba(30,64,175,0),rgba(14,165,233,0),rgba(15,118,110,0));-webkit-mask:linear-gradient(#000 0 0) content-box,linear-gradient(#000 0 0);-webkit-mask-composite:xor;mask-composite:exclude;opacity:0;transition:opacity .45s ease,background .6s ease;pointer-events:none}
.vc-card:hover{transform:translateY(-4px);box-shadow:0 20px 40px -18px rgba(30,58,138,.3)}
.vc-card:hover::before{opacity:1;background:linear-gradient(135deg,#1e3a8a 0%,#0ea5e9 50%,#0f766e 100%)}

/* ============ Hero layered background + slogan carousel ============ */
.vc-hero{position:relative;overflow:hidden;background:linear-gradient(135deg,#0f172a 0%,#1e3a8a 55%,#1e40af 100%);color:#fff;isolation:isolate}
.vc-hero::before,.vc-hero::after{content:"";position:absolute;border-radius:9999px;filter:blur(80px);opacity:.55;z-index:0;pointer-events:none}
.vc-hero::before{width:520px;height:520px;background:radial-gradient(circle,#0ea5e9 0%,transparent 70%);top:-120px;right:-80px;animation:vcFloat 14s ease-in-out infinite}
.vc-hero::after{width:460px;height:460px;background:radial-gradient(circle,#0f766e 0%,transparent 70%);bottom:-140px;left:-60px;animation:vcFloat 18s ease-in-out -6s infinite reverse}
.vc-hero > *{position:relative;z-index:1}
@keyframes vcFloat{0%,100%{transform:translate3d(0,0,0) scale(1)}50%{transform:translate3d(20px,-26px,0) scale(1.05)}}

.vc-slogan{position:relative;min-height:3.8rem}
.vc-slogan-item{position:absolute;inset:0;display:flex;align-items:center;justify-content:center;font-family:var(--vc-font-head);font-weight:600;font-size:clamp(1.05rem,1.6vw,1.35rem);opacity:0;transform:translateY(10px);transition:opacity .8s ease,transform .8s ease;pointer-events:none;text-align:center;padding:0 1rem}
.vc-slogan-item.is-active{opacity:1;transform:translateY(0);pointer-events:auto}

/* ============ Light-sweep button ============ */
.vc-btn{position:relative;display:inline-flex;align-items:center;justify-content:center;gap:.5rem;padding:.85rem 1.6rem;border-radius:8px;font-weight:600;font-family:var(--vc-font-head);border:0;cursor:pointer;overflow:hidden;isolation:isolate;transition:transform .15s ease,box-shadow .3s ease,background-color .3s ease;min-height:48px;text-decoration:none}
.vc-btn:active{transform:translateY(1px)}
.vc-btn-primary{background:linear-gradient(135deg,#1e3a8a,#1e40af);color:#fff;box-shadow:0 10px 24px -10px rgba(30,58,138,.65)}
.vc-btn-primary:hover{background:linear-gradient(135deg,#1d4ed8,#2563eb);color:#fff;box-shadow:0 14px 30px -10px rgba(30,64,175,.75)}
.vc-btn-ghost{background:rgba(255,255,255,.08);color:#fff;border:1px solid rgba(255,255,255,.25);backdrop-filter:blur(6px)}
.vc-btn-ghost:hover{background:rgba(255,255,255,.16);color:#fff;border-color:rgba(255,255,255,.5)}
.vc-btn-light{background:#fff;color:var(--vc-navy);box-shadow:0 6px 18px -8px rgba(15,23,42,.25)}
.vc-btn-light:hover{background:#f1f5f9;color:var(--vc-navy)}
.vc-btn::before{content:"";position:absolute;top:0;left:-75%;width:50%;height:100%;background:linear-gradient(120deg,transparent,rgba(255,255,255,.55),transparent);transform:skewX(-20deg);z-index:-1;opacity:0;transition:left .8s ease,opacity .3s ease}
.vc-btn:hover::before{left:130%;opacity:1}
@media (prefers-reduced-motion:reduce){.vc-btn::before{display:none}}

/* ============ Icon float animation ============ */
.vc-icon-float{display:inline-flex;animation:vcIconFloat 4.5s ease-in-out infinite}
.vc-card:nth-child(2n) .vc-icon-float{animation-delay:.8s}
.vc-card:nth-child(3n) .vc-icon-float{animation-delay:1.6s}
.vc-card:nth-child(4n) .vc-icon-float{animation-delay:2.2s}
.vc-card:nth-child(5n) .vc-icon-float{animation-delay:3s}
@keyframes vcIconFloat{0%,100%{transform:translateY(0)}50%{transform:translateY(-6px)}}
@media (prefers-reduced-motion:reduce){.vc-icon-float{animation:none}}

/* ============ Calculator form ============ */
.vc-calc-wrap{background:linear-gradient(180deg,#ffffff,#f8fafc);border:1px solid var(--vc-border);border-radius:16px;box-shadow:var(--vc-shadow);padding:clamp(1rem,2vw,1.75rem)}
.vc-field{margin-bottom:1rem}
.vc-field label{display:block;font-weight:600;font-size:.92rem;color:#334155;margin-bottom:.4rem;font-family:var(--vc-font-head)}
.vc-field .hint{display:block;font-size:.78rem;color:#64748b;margin-top:.25rem}
.vc-input,.vc-select{width:100%;min-height:48px;padding:.75rem 1rem;border:1px solid #cbd5e1;border-radius:10px;background:#fff;font-size:1rem;color:var(--vc-ink);transition:border-color .2s ease,box-shadow .2s ease;font-family:var(--vc-font-body)}
.vc-input:focus,.vc-select:focus{outline:none;border-color:var(--vc-navy);box-shadow:0 0 0 3px rgba(30,64,175,.15)}
.vc-range{width:100%;accent-color:var(--vc-navy)}

.vc-result{background:linear-gradient(135deg,#eff6ff,#ecfeff);border:1px solid #bfdbfe;border-radius:14px;padding:1.25rem}
.vc-result .big{font-family:var(--vc-font-head);font-weight:800;font-size:clamp(1.8rem,3vw,2.6rem);color:var(--vc-navy);line-height:1.1}
.vc-result .tag{display:inline-block;padding:.25rem .6rem;border-radius:999px;background:#dbeafe;color:var(--vc-navy);font-weight:600;font-size:.78rem;margin-bottom:.6rem}

.vc-table{width:100%;border-collapse:separate;border-spacing:0;border:1px solid var(--vc-border);border-radius:10px;overflow:hidden;font-size:.92rem}
.vc-table th,.vc-table td{border:1px solid var(--vc-border);padding:.65rem .85rem;text-align:left}
.vc-table th{background:linear-gradient(180deg,#f1f5f9,#e2e8f0);font-family:var(--vc-font-head);font-weight:700;color:#0f172a}
.vc-table tbody tr:nth-child(even) td{background:#f8fafc}
.vc-table tbody tr:hover td{background:#eff6ff}

/* ============ Ad placeholder (CLS guard) ============ */
.vc-ad{min-height:110px;max-width:100%;background:repeating-linear-gradient(45deg,#f8fafc,#f8fafc 6px,#f1f5f9 6px,#f1f5f9 12px);border:1px dashed #cbd5e1;border-radius:10px;display:flex;align-items:center;justify-content:center;color:#94a3b8;font-size:.78rem;letter-spacing:.05em;text-transform:uppercase;margin:1.25rem 0;overflow:hidden}
.vc-ad ins{display:block;width:100%}

/* ============ Article ============ */
.vc-article{font-size:1.05rem;color:#1e293b}
.vc-article .lead{background:linear-gradient(135deg,#eff6ff,#f0fdfa);border-left:4px solid var(--vc-navy);padding:1rem 1.25rem;border-radius:0 10px 10px 0;margin:1.5rem 0;font-weight:500}
.vc-callout{background:#fffbeb;border:1px solid #fde68a;border-left:4px solid var(--vc-gold);padding:1rem 1.25rem;border-radius:10px;margin:1.5rem 0}
.vc-callout.blue{background:#eff6ff;border-color:#bfdbfe;border-left-color:var(--vc-navy)}
.vc-callout.teal{background:#f0fdfa;border-color:#99f6e4;border-left-color:var(--vc-teal)}
.vc-faq-item{border:1px solid var(--vc-border);border-radius:12px;padding:1rem 1.25rem;margin-bottom:.75rem;background:#fff}
.vc-faq-item q{font-weight:700;color:var(--vc-navy);display:block;margin-bottom:.4rem;font-family:var(--vc-font-head)}

/* ============ Author Card ============ */
.vc-author-card{display:flex;align-items:center;gap:1rem;padding:1rem 1.25rem;background:linear-gradient(135deg,#f8fafc,#f1f5f9);border:1px solid var(--vc-border);border-radius:14px;margin:1.5rem 0}
.vc-author-avatar{width:48px;height:48px;border-radius:50%;background:linear-gradient(135deg,var(--vc-navy),var(--vc-teal));display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:1.1rem;flex-shrink:0}
.vc-author-info{flex:1;min-width:0}
.vc-author-name{font-weight:700;color:var(--vc-navy);font-size:.95rem}
.vc-author-name a{color:inherit;text-decoration:none}
.vc-author-name a:hover{text-decoration:underline}
.vc-author-title{font-size:.8rem;color:#64748b;margin-top:.15rem}
.vc-author-meta{font-size:.78rem;color:#94a3b8;margin-top:.3rem}
.vc-author-meta .vc-readtime{color:#94a3b8;font-weight:400}

/* ============ Highlight Data Box ============ */
.vc-data-box{background:#eff6ff;border:1px solid #bfdbfe;border-left:4px solid var(--vc-navy);padding:.875rem 1.125rem;border-radius:10px;margin:1.25rem 0;font-size:.95rem}
.vc-data-box strong{color:var(--vc-navy)}
.vc-data-box.amber{background:#fffbeb;border-color:#fde68a;border-left-color:var(--vc-gold)}
.vc-data-box.amber strong{color:#92400e}
.vc-data-box.teal{background:#f0fdfa;border-color:#99f6e4;border-left-color:var(--vc-teal)}
.vc-data-box.teal strong{color:#0f766e}

/* ============ Article Paragraph Spacing ============ */
.vc-article p{margin-bottom:1.1rem;line-height:1.75}
.vc-article h2{font-size:1.5rem;font-weight:800;color:var(--vc-navy);margin-top:2.5rem;margin-bottom:1rem;font-family:var(--vc-font-head)}
.vc-article h3{font-size:1.2rem;font-weight:600;color:#334155;margin-top:1.75rem;margin-bottom:.75rem}
.vc-article h4{font-size:1.05rem;font-weight:600;color:#475569;margin-top:1.25rem;margin-bottom:.5rem}
.vc-article ol,.vc-article ul{margin-bottom:1.1rem;padding-left:1.5rem}
.vc-article ol li,.vc-article ul li{margin-bottom:.4rem;line-height:1.7}
.vc-article .vc-transition{color:#64748b;font-style:italic;font-size:.9rem;margin-top:-.5rem;margin-bottom:1.5rem}

/* ============ Footer ============ */
.vc-footer{background:linear-gradient(180deg,#0f172a,#020617);color:#cbd5e1;padding:3rem 0 2rem;margin-top:4rem}
.vc-footer a{color:#93c5fd;text-decoration:none}
.vc-footer a:hover{color:#bfdbfe;text-decoration:underline}
.vc-footer h4{color:#fff;font-family:var(--vc-font-head);margin-bottom:.75rem;font-size:1rem}

/* ============ Utility: Container ============ */
.vc-container{width:100%;max-width:1280px;margin:0 auto;padding:0 1.1rem}
.vc-section{padding:3.25rem 0}
.vc-chip{display:inline-block;padding:.3rem .7rem;font-size:.75rem;font-weight:600;border-radius:999px;background:#dbeafe;color:var(--vc-navy);margin-right:.4rem;margin-bottom:.4rem}
.vc-chip.teal{background:#ccfbf1;color:#0f766e}
.vc-chip.amber{background:#fef3c7;color:var(--vc-gold)}
.vc-chip.sky{background:#e0f2fe;color:#0369a1}

/* ============ Responsive helpers ============ */
@media (max-width:640px){
  .vc-hero{padding:2.5rem 0 3rem}
  h1{font-size:1.9rem}
  .vc-btn{padding:.8rem 1.2rem;font-size:.95rem}
}