/* CalcHub Shared Styles */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700;800;900&display=swap');
:root{
  --primary:#2563EB;--primary-dark:#1D4ED8;--primary-light:#EFF6FF;--primary-xlight:#F0F5FF;
  --green:#059669;--purple:#7C3AED;--orange:#D97706;--rose:#E11D48;--teal:#0D9488;
  --dark:#0F172A;--mid:#64748B;--muted:#94A3B8;--faint:#CBD5E1;
  --bg:#F1F5F9;--surface:#fff;--border:#E2E8F0;
  --sh1:0 1px 3px rgba(15,23,42,.06);
  --sh2:0 2px 10px rgba(15,23,42,.07),0 1px 3px rgba(15,23,42,.04);
  --sh3:0 8px 30px rgba(15,23,42,.09),0 2px 8px rgba(15,23,42,.04);
  --sh4:0 20px 50px rgba(15,23,42,.13);
  --r:12px;--rl:16px;
}
*{margin:0;padding:0;box-sizing:border-box}
html{scroll-behavior:smooth;scroll-padding-top:60px}
body{font-family:'Inter',-apple-system,sans-serif;background:var(--bg);color:var(--dark);line-height:1.5;overflow-x:hidden}

/* HEADER */
header{background:#fff;border-bottom:1px solid var(--border);position:sticky;top:0;z-index:200;box-shadow:var(--sh1)}
.hdr{max-width:1280px;margin:0 auto;padding:0 20px;display:flex;align-items:center;height:56px;gap:0}
.logo{font-size:18px;font-weight:900;color:var(--primary);text-decoration:none;display:flex;align-items:center;gap:8px;flex-shrink:0;letter-spacing:-.5px;margin-right:20px}
.logo-box{width:30px;height:30px;background:linear-gradient(135deg,var(--primary),var(--primary-dark));border-radius:8px;display:flex;align-items:center;justify-content:center;color:#fff;font-size:15px;font-weight:900}
nav{display:flex;gap:1px;flex:1;overflow-x:auto;-webkit-overflow-scrolling:touch}
nav::-webkit-scrollbar{display:none}
nav a{text-decoration:none;color:var(--mid);font-size:13px;font-weight:600;padding:5px 12px;border-radius:7px;transition:all .15s;white-space:nowrap;flex-shrink:0}
nav a:hover{background:var(--primary-light);color:var(--primary)}
nav a.active{background:var(--primary-light);color:var(--primary);font-weight:700}
.hdr-right{display:flex;align-items:center;gap:8px;flex-shrink:0;margin-left:12px}
.lang-wrap{position:relative}
.lang-btn{display:flex;align-items:center;gap:6px;padding:6px 11px;background:var(--bg);border:1.5px solid var(--border);border-radius:8px;cursor:pointer;font-size:12px;font-weight:700;color:var(--dark);transition:all .15s;font-family:inherit}
.lang-btn:hover{border-color:var(--primary);background:#fff}
.lang-menu{position:absolute;top:calc(100% + 6px);right:0;background:#fff;border:1px solid var(--border);border-radius:12px;box-shadow:var(--sh4);min-width:210px;display:none;overflow:hidden;z-index:300;padding:4px}
.lang-menu.open{display:block}
.lang-opt{display:flex;align-items:center;gap:9px;padding:8px 11px;cursor:pointer;font-size:13px;font-weight:600;border-radius:8px;transition:background .12s}
.lang-opt:hover{background:var(--bg)}
.lang-opt.active{background:var(--primary-light);color:var(--primary);font-weight:700}
.lang-opt .flg{font-size:18px;line-height:1}
.lang-div{height:1px;background:var(--border);margin:3px 6px}

/* HERO (slim) */
.hero{background:linear-gradient(135deg,#0F172A,#1E3A8A 55%,#1D4ED8);color:#fff;padding:16px 20px;position:relative;overflow:hidden}
.hero::before{content:'';position:absolute;inset:0;background:radial-gradient(circle at 70% 50%,rgba(99,102,241,.25) 0%,transparent 60%);pointer-events:none}
.hero-inner{max-width:1280px;margin:0 auto;display:flex;align-items:center;justify-content:space-between;gap:16px;position:relative;z-index:1}
.hero-left{display:flex;align-items:center;gap:14px}
.hero h1{font-size:16px;font-weight:800;letter-spacing:-.3px;line-height:1.3}
.hero h1 em{font-style:normal;color:#93C5FD}
.hero p{font-size:12px;color:rgba(255,255,255,.6);margin-top:1px}
.hero-badge{display:inline-flex;align-items:center;gap:6px;background:rgba(255,255,255,.1);border:1px solid rgba(255,255,255,.18);padding:4px 10px;border-radius:20px;font-size:10px;font-weight:700;letter-spacing:.05em;text-transform:uppercase;white-space:nowrap}
.hero-badge .dot{width:5px;height:5px;background:#34D399;border-radius:50%;animation:pulse 2s infinite}
@keyframes pulse{0%,100%{opacity:1}50%{opacity:.4}}
.hero-stats{display:flex;align-items:center;gap:20px}
.stat .num{font-size:18px;font-weight:900;display:block;letter-spacing:-.5px;line-height:1.1}
.stat .lbl{font-size:10px;color:rgba(255,255,255,.5);font-weight:600}

/* TOAST */
#toast{position:fixed;top:70px;right:16px;background:var(--dark);color:#fff;padding:10px 14px;border-radius:10px;font-size:12px;font-weight:600;display:flex;align-items:center;gap:8px;z-index:1000;box-shadow:var(--sh3);opacity:0;transform:translateY(-8px) scale(.96);transition:opacity .3s,transform .3s;pointer-events:none}
#toast.show{opacity:1;transform:none}

/* AD SLOTS */
.ad-wrap{max-width:1280px;margin:0 auto;padding:12px 20px}
.ad-slot{background:#fff;border:1.5px dashed var(--faint);border-radius:8px;display:flex;align-items:center;justify-content:center;color:var(--muted);font-size:11px;font-weight:600;letter-spacing:.07em;text-transform:uppercase}
.ad-banner{height:70px}

/* SECTION */
.sec{max-width:1280px;margin:0 auto;padding:20px 20px 0}
.sec-hd{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px}
.sec-title{font-size:14px;font-weight:800;display:flex;align-items:center;gap:7px;color:var(--mid);text-transform:uppercase;letter-spacing:.06em}
.chip{display:inline-flex;align-items:center;gap:4px;background:#FEF3C7;color:#92400E;border:1px solid #FDE68A;font-size:10px;font-weight:700;padding:3px 9px;border-radius:20px;text-transform:uppercase;letter-spacing:.04em}

/* TOOL CARDS */
.tools-grid{display:grid;grid-template-columns:repeat(4,1fr);gap:10px}
.tool-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--r);padding:14px 16px;display:flex;align-items:flex-start;gap:11px;text-decoration:none;color:inherit;cursor:pointer;box-shadow:var(--sh1);transition:box-shadow .2s,border-color .2s,transform .2s;position:relative;overflow:hidden}
.tool-card::before{content:'';position:absolute;left:0;top:0;bottom:0;width:3px;background:var(--primary);opacity:0;transition:opacity .2s;border-radius:3px 0 0 3px}
.tool-card:hover{box-shadow:var(--sh3);border-color:var(--primary);transform:translateY(-2px)}
.tool-card:hover::before{opacity:1}
.t-icon{width:38px;height:38px;border-radius:9px;flex-shrink:0;display:flex;align-items:center;justify-content:center;font-size:18px}
.fi{background:#EFF6FF}.hi{background:#F0FDF4}.mi{background:#FFF7ED}
.t-body{flex:1;min-width:0}
.t-name{font-size:13px;font-weight:700;margin-bottom:2px;letter-spacing:-.2px;line-height:1.3}
.t-desc{font-size:11px;color:var(--mid);line-height:1.4}
.t-badge{display:inline-block;font-size:10px;font-weight:700;padding:2px 7px;border-radius:4px;margin-top:5px}
.tb-y{background:#FEF9C3;color:#92400E}.tb-g{background:#D1FAE5;color:#065F46}
.t-arrow{position:absolute;right:12px;bottom:12px;font-size:12px;color:var(--primary);opacity:0;transition:opacity .2s,transform .2s}
.tool-card:hover .t-arrow{opacity:1;transform:translateX(3px)}

/* CALC SECTION */
.calc-wrap{max-width:1280px;margin:0 auto;padding:24px 20px 40px}
.calc-card{background:var(--surface);border:1px solid var(--border);border-radius:var(--rl);overflow:hidden;margin-bottom:24px;box-shadow:var(--sh2)}
.chdr{padding:18px 22px;color:#fff;display:flex;align-items:center;gap:12px}
.chdr-blue{background:linear-gradient(135deg,#1D4ED8,#3B82F6)}
.chdr-green{background:linear-gradient(135deg,#047857,#10B981)}
.chdr-purple{background:linear-gradient(135deg,#5B21B6,#8B5CF6)}
.chdr-orange{background:linear-gradient(135deg,#B45309,#F59E0B)}
.chdr-teal{background:linear-gradient(135deg,#0F766E,#14B8A6)}
.chdr-rose{background:linear-gradient(135deg,#9F1239,#F43F5E)}
.chdr-icon{width:42px;height:42px;background:rgba(255,255,255,.18);border-radius:10px;display:flex;align-items:center;justify-content:center;font-size:22px;flex-shrink:0}
.chdr h2{font-size:17px;font-weight:800;letter-spacing:-.3px}
.chdr p{font-size:12px;opacity:.7;margin-top:1px}
.cbody{padding:22px;display:grid;grid-template-columns:340px 1fr;gap:22px;align-items:start}
.cinputs{display:flex;flex-direction:column;gap:12px}
.fg{display:flex;flex-direction:column;gap:5px}
.fg label{font-size:11px;font-weight:700;color:var(--mid);letter-spacing:.05em;text-transform:uppercase}
.fg input,.fg select{width:100%;padding:9px 12px;border:1.5px solid var(--border);border-radius:8px;font-size:14px;color:var(--dark);background:#fff;transition:border-color .15s,box-shadow .15s;font-family:inherit;outline:none;appearance:none;-webkit-appearance:none}
.fg select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath fill='%2364748B' d='M1 1l5 5 5-5'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 10px center;padding-right:28px}
.fg input:focus,.fg select:focus{border-color:var(--primary);box-shadow:0 0 0 3px rgba(37,99,235,.1)}
.fg .pw{position:relative}
.fg .pw .pfx{position:absolute;left:11px;top:50%;transform:translateY(-50%);color:var(--mid);font-size:13px;font-weight:700;pointer-events:none;z-index:1}
.fg .pw input{padding-left:22px}
.two-col{display:grid;grid-template-columns:1fr 1fr;gap:10px}
.cbtn{width:100%;padding:11px;margin-top:2px;background:var(--primary);color:#fff;border:none;border-radius:9px;font-size:14px;font-weight:700;cursor:pointer;font-family:inherit;letter-spacing:-.1px;transition:filter .15s,transform .1s}
.cbtn:hover{filter:brightness(1.08)}
.cbtn:active{transform:scale(.98)}
.cbtn-green{background:var(--green)}.cbtn-purple{background:var(--purple)}.cbtn-orange{background:var(--orange)}.cbtn-teal{background:var(--teal)}.cbtn-rose{background:var(--rose)}
.utog{display:flex;background:var(--bg);border:1.5px solid var(--border);border-radius:8px;overflow:hidden;padding:3px;gap:3px}
.ubtn{flex:1;padding:6px 10px;background:none;border:none;font-size:12px;font-weight:700;cursor:pointer;transition:all .15s;font-family:inherit;color:var(--mid);border-radius:6px}
.ubtn.on{background:#fff;color:var(--primary);box-shadow:var(--sh1)}
.cresults{display:flex;flex-direction:column;gap:10px}
.res-title{font-size:12px;font-weight:700;color:var(--mid);letter-spacing:.05em;text-transform:uppercase}
.res-main{border-radius:12px;padding:18px 20px;color:#fff}
.res-main .rl{font-size:10px;font-weight:700;letter-spacing:.08em;text-transform:uppercase;opacity:.65;margin-bottom:3px}
.res-main .rv{font-size:34px;font-weight:900;line-height:1;letter-spacing:-1.5px}
.res-main .rsub{font-size:12px;opacity:.6;margin-top:5px}
.res-grid{display:grid;grid-template-columns:1fr 1fr;gap:8px}
.rb{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:11px 13px}
.rb .rl{font-size:10px;font-weight:700;letter-spacing:.06em;text-transform:uppercase;color:var(--mid)}
.rb .rv{font-size:18px;font-weight:800;color:var(--dark);margin-top:2px;letter-spacing:-.4px}
.rb-green{background:#F0FDF4;border-color:#A7F3D0}.rb-green .rl,.rb-green .rv{color:#065F46}.rb-green .rv{font-size:13px;font-weight:600}
.rb-orange{background:#FFFBEB;border-color:#FDE68A}.rb-orange .rl,.rb-orange .rv{color:#92400E}.rb-orange .rv{font-size:13px;font-weight:600}
.res-empty{display:flex;flex-direction:column;align-items:center;justify-content:center;min-height:180px;background:var(--bg);border:1.5px dashed var(--faint);border-radius:12px;color:var(--muted);font-size:13px;font-weight:500;gap:8px}
.res-empty .ei{font-size:32px;line-height:1;opacity:.5}
.donut-wrap{display:flex;align-items:center;gap:16px;background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:14px 16px}
.donut-svg{flex-shrink:0}
.donut-legend{display:flex;flex-direction:column;gap:8px;font-size:12px}
.dl-item{display:flex;align-items:center;gap:7px;font-weight:600}
.dl-dot{width:9px;height:9px;border-radius:50%;flex-shrink:0}
.dl-amt{font-size:11px;color:var(--mid);font-weight:500}
.prog-wrap{background:var(--bg);border:1px solid var(--border);border-radius:10px;padding:13px 15px}
.prog-label{display:flex;justify-content:space-between;font-size:11px;font-weight:700;color:var(--mid);margin-bottom:7px}
.prog-track{height:8px;background:var(--border);border-radius:4px;overflow:hidden}
.prog-fill{height:100%;border-radius:4px;background:linear-gradient(90deg,var(--green),var(--primary));width:0%;transition:width 1s cubic-bezier(.16,1,.3,1)}
.prog-fill.danger{background:linear-gradient(90deg,#F59E0B,#EF4444)}
.bmi-gauge{background:var(--bg);border:1px solid var(--border);border-radius:12px;padding:16px;text-align:center}
.bmi-num{font-size:52px;font-weight:900;line-height:1;letter-spacing:-3px}
.bmi-tag{display:inline-block;padding:4px 16px;border-radius:20px;font-size:12px;font-weight:700;margin-top:6px}
.bU{color:#2563EB;background:#DBEAFE}.bN{color:#059669;background:#D1FAE5}.bO{color:#D97706;background:#FEF3C7}.bX{color:#DC2626;background:#FEE2E2}
.bmi-bar-wrap{margin:14px 0 5px;height:8px;border-radius:4px;background:linear-gradient(90deg,#BFDBFE 0%,#D1FAE5 40%,#FEF3C7 65%,#FEE2E2 100%);position:relative}
.bmi-marker{position:absolute;top:50%;width:16px;height:16px;background:var(--dark);border:3px solid #fff;border-radius:50%;box-shadow:0 2px 6px rgba(0,0,0,.3);transform:translate(-50%,-50%);transition:left .8s cubic-bezier(.16,1,.3,1)}
.bmi-scale{display:flex;justify-content:space-between;font-size:9px;color:var(--muted);font-weight:700;margin-top:2px}

/* INFO/FAQ SECTION */
.info-sec{max-width:1280px;margin:0 auto;padding:32px 20px 8px}
.info-sec h2{font-size:20px;font-weight:800;letter-spacing:-.4px;margin-bottom:12px;color:var(--dark)}
.info-sec p{font-size:14px;color:var(--mid);line-height:1.75;margin-bottom:12px}
.faq-list{display:flex;flex-direction:column;gap:12px;margin-top:20px}
.faq-item{background:var(--surface);border:1px solid var(--border);border-radius:12px;padding:16px 18px}
.faq-item h3{font-size:14px;font-weight:700;margin-bottom:6px;color:var(--dark)}
.faq-item p{font-size:13px;color:var(--mid);line-height:1.6;margin:0}

/* FOOTER */
footer{background:var(--dark);color:rgba(255,255,255,.45);padding:32px 20px;margin-top:40px}
.ftr{max-width:1280px;margin:0 auto;display:flex;flex-wrap:wrap;gap:20px;align-items:center;justify-content:space-between}
.flogo{font-size:17px;font-weight:900;color:#fff;letter-spacing:-.5px}
.fp{font-size:12px;max-width:400px;line-height:1.6}
.fp .lk{color:var(--green);margin-right:4px}
.flinks{display:flex;flex-wrap:wrap;gap:8px 16px}
.flinks a{color:rgba(255,255,255,.4);font-size:12px;text-decoration:none;font-weight:600;transition:color .15s}
.flinks a:hover{color:rgba(255,255,255,.8)}

/* RESPONSIVE */
@media(max-width:1100px){.tools-grid{grid-template-columns:repeat(3,1fr)}}
@media(max-width:820px){
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .cbody{grid-template-columns:1fr}
  .hero-stats{display:none}
}
@media(max-width:500px){
  .tools-grid{grid-template-columns:repeat(2,1fr)}
  .hdr{padding:0 12px}
  .cbody,.chdr{padding:14px}
}
@media(prefers-reduced-motion:reduce){*{transition-duration:.01ms!important;animation-duration:.01ms!important}}