/* ============================================================
   TOOLBOX — shared design system
   ============================================================ */

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

:root{
  --paper:#F3F4F7;
  --surface:#FFFFFF;
  --surface-alt:#ECEEF3;
  --ink:#161A23;
  --muted:#5B6472;
  --faint:#8A91A0;
  --line:#DCE0E8;
  --line-strong:#C5CBD6;
  --accent:#FF6A39;
  --accent-ink:#FFEDE3;
  --accent-dark:#E0501F;
  --blue:#2563EB;
  --blue-tint:#DBEAFE;
  --success:#1C8A5C;
  --success-tint:#E4F5EC;
  --warn:#C2410C;
  --error:#DC2626;
  --error-tint:#FDEAEA;
  --f-display:'Space Grotesk',sans-serif;
  --f-body:'Inter',sans-serif;
  --f-mono:'IBM Plex Mono',monospace;
  --radius:14px;
  --radius-sm:9px;
  --radius-lg:20px;
  --shadow-sm:0 1px 2px rgba(22,26,35,0.06);
  --shadow-md:0 6px 24px rgba(22,26,35,0.08);
  --shadow-lg:0 16px 48px rgba(22,26,35,0.12);
  --maxw:1080px;
}

html{scroll-behavior:smooth}
body{font-family:var(--f-body);background:var(--paper);color:var(--ink);line-height:1.6;font-size:16px;-webkit-font-smoothing:antialiased;}
a{color:var(--blue);text-decoration:none}
a:hover{text-decoration:underline}
img{max-width:100%;display:block}
ul,ol{list-style:none}
button{font-family:inherit}
:focus-visible{outline:2.5px solid var(--accent);outline-offset:2px;border-radius:4px}
.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px}
.wrap-narrow{max-width:760px;margin:0 auto;padding:0 24px}

.tick-rule{height:14px;width:100%;background-image:repeating-linear-gradient(to right,var(--line-strong) 0,var(--line-strong) 1.5px,transparent 1.5px,transparent 24px);background-position:center;background-repeat:repeat-x;background-size:auto 14px;border-top:1px solid var(--line);border-bottom:1px solid var(--line);margin:0;}
.tick-rule.tight{height:9px;background-size:auto 9px}

/* ── HEADER ── */
header.site{background:var(--blue);border-bottom:1px solid rgba(255,255,255,0.12);position:sticky;top:0;z-index:200;}
.site-nav{max-width:var(--maxw);margin:0 auto;padding:0 24px;height:64px;display:flex;align-items:center;justify-content:space-between;}
.brand{display:flex;align-items:center;gap:10px;font-family:var(--f-display);font-weight:700;font-size:1.25rem;color:#fff;}
.brand-mark{width:34px;height:34px;border-radius:9px;background:#fff;color:var(--blue);display:flex;align-items:center;justify-content:center;font-family:var(--f-mono);font-weight:600;font-size:0.95rem;flex-shrink:0;}
.brand .accent-word{color:var(--accent)}

nav.primary{display:flex;align-items:center;gap:1px;flex-wrap:nowrap;overflow:hidden;}
nav.primary a{
  font-size:0.72rem;font-weight:500;color:rgba(255,255,255,0.8);
  padding:6px 7px;border-radius:8px;transition:background .15s,color .15s;
  white-space:nowrap;
}
nav.primary a:hover{background:rgba(255,255,255,0.14);color:#fff;text-decoration:none}
nav.primary a.current{color:#fff;background:var(--accent)}

.hamburger{display:none;background:none;border:1.5px solid rgba(255,255,255,0.4);border-radius:8px;padding:8px;cursor:pointer;color:#fff;}
.mobile-nav{display:none;position:fixed;top:64px;left:0;right:0;background:var(--surface);border-bottom:1px solid var(--line);padding:10px;z-index:199;box-shadow:var(--shadow-md);flex-direction:column;gap:2px;}
.mobile-nav.open{display:flex}
.mobile-nav a{padding:12px 14px;border-radius:9px;font-weight:500;color:var(--ink);display:flex;align-items:center;gap:10px;}
.mobile-nav a:hover,.mobile-nav a.current{background:var(--accent-ink);text-decoration:none}

@media (max-width:900px){
  nav.primary{display:none}
  .hamburger{display:flex}
}

/* ── HERO ── */
.hero{padding:52px 0 36px}
.eyebrow{display:inline-flex;align-items:center;gap:7px;font-family:var(--f-mono);font-size:0.74rem;font-weight:500;letter-spacing:0.06em;text-transform:uppercase;color:var(--accent-dark);background:var(--accent-ink);border:1px solid #FFD9C4;padding:5px 11px;border-radius:50px;margin-bottom:16px;}
.eyebrow.blue{color:var(--blue);background:var(--blue-tint);border-color:#BFDBFE}
h1{font-family:var(--f-display);font-weight:700;font-size:clamp(1.9rem,4.2vw,2.7rem);letter-spacing:-0.02em;line-height:1.12;color:var(--ink);max-width:720px;}
.hero p.lede{margin-top:14px;color:var(--muted);font-size:1.05rem;max-width:560px;}
.breadcrumb{font-size:0.82rem;color:var(--faint);margin-bottom:18px;display:flex;align-items:center;gap:6px;flex-wrap:wrap;}
.breadcrumb a{color:var(--faint)}
.breadcrumb a:hover{color:var(--blue)}
.breadcrumb .sep{color:var(--line-strong)}
.breadcrumb .here{color:var(--muted)}

/* ── TOOL CARD ── */
.tool-card{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius-lg);box-shadow:var(--shadow-md);padding:32px;position:relative;margin:28px 0;}
.tool-card::before{content:'';position:absolute;top:14px;left:14px;width:10px;height:10px;border-top:2px solid var(--line-strong);border-left:2px solid var(--line-strong);border-radius:2px 0 0 0;}
.tool-card::after{content:'';position:absolute;bottom:14px;right:14px;width:10px;height:10px;border-bottom:2px solid var(--line-strong);border-right:2px solid var(--line-strong);border-radius:0 0 2px 0;}
@media (max-width:600px){.tool-card{padding:22px 18px}}

.field{margin-bottom:18px}
.field:last-child{margin-bottom:0}
label{display:block;font-size:0.76rem;font-weight:600;color:var(--muted);margin-bottom:7px;text-transform:uppercase;letter-spacing:0.05em;}
input[type="text"],input[type="number"],input[type="date"],select,textarea{width:100%;padding:12px 15px;border:1.5px solid var(--line);border-radius:var(--radius-sm);font-size:0.96rem;font-family:var(--f-body);color:var(--ink);background:var(--surface-alt);outline:none;transition:border-color .15s,box-shadow .15s,background .15s;-webkit-appearance:none;}
input:focus,select:focus,textarea:focus{border-color:var(--accent);box-shadow:0 0 0 3.5px var(--accent-ink);background:var(--surface);}
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 d='M1 1l5 5 5-5' stroke='%235B6472' stroke-width='1.5' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 14px center;padding-right:38px;cursor:pointer;}
textarea{resize:vertical;min-height:140px;font-family:var(--f-body)}
.row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media (max-width:560px){.row{grid-template-columns:1fr}}

.btn{background:var(--ink);color:#fff;border:none;padding:13px 24px;border-radius:var(--radius-sm);font-size:0.92rem;font-weight:600;font-family:var(--f-body);cursor:pointer;transition:transform .12s,box-shadow .12s,background .12s;display:inline-flex;align-items:center;gap:8px;letter-spacing:-0.01em;}
.btn:hover{transform:translateY(-1px);box-shadow:var(--shadow-md)}
.btn:active{transform:translateY(0)}
.btn.primary{background:var(--accent)}
.btn.primary:hover{background:var(--accent-dark)}
.btn-sm{padding:9px 16px;font-size:0.82rem;border-radius:8px}
.btn-outline{background:transparent;border:1.5px solid var(--line-strong);color:var(--ink)}
.btn-outline:hover{background:var(--surface-alt);box-shadow:none}
.btn[disabled]{opacity:0.55;cursor:not-allowed;transform:none!important}

/* ── READOUT ── */
.readout{background:var(--ink);border-radius:var(--radius);padding:22px 24px;margin-top:22px;display:none;color:#fff;}
.readout.show{display:block;animation:rise .2s ease}
@keyframes rise{from{opacity:0;transform:translateY(6px)}to{opacity:1;transform:translateY(0)}}
.readout-label{font-family:var(--f-mono);font-size:0.7rem;font-weight:500;color:#FFB28F;text-transform:uppercase;letter-spacing:0.08em;margin-bottom:8px;}
.readout-value{font-family:var(--f-mono);font-size:clamp(1.5rem,4vw,2.1rem);font-weight:600;letter-spacing:-0.01em;line-height:1.2;}
.readout-sub{font-size:0.86rem;color:#C9CDD8;margin-top:8px;line-height:1.5}
.breakdown{display:flex;flex-wrap:wrap;gap:8px;margin-top:16px}
.chip{background:rgba(255,255,255,0.08);border:1px solid rgba(255,255,255,0.14);border-radius:8px;padding:7px 12px;font-size:0.8rem;color:#C9CDD8;display:flex;align-items:center;gap:6px;font-family:var(--f-mono);}
.chip strong{color:#fff;font-weight:600}
.note{background:var(--blue-tint);border:1px solid #BFDBFE;border-radius:9px;padding:11px 14px;font-size:0.82rem;color:var(--blue);display:flex;align-items:flex-start;gap:8px;margin-top:14px;line-height:1.5;}
.note svg{flex-shrink:0;margin-top:1px}
.note.warn{background:#FFF3EC;border-color:#FFD9C4;color:var(--accent-dark)}

/* ── SECTIONS ── */
.section{padding:40px 0}
.section h2{font-family:var(--f-display);font-weight:700;font-size:1.5rem;letter-spacing:-0.01em;margin-bottom:14px;color:var(--ink);}
.section h3{font-family:var(--f-display);font-weight:600;font-size:1.08rem;margin-bottom:8px;color:var(--ink);}
.section p{color:var(--muted);max-width:680px;margin-bottom:14px;font-size:0.97rem}
.section p:last-child{margin-bottom:0}
.steps{display:grid;gap:14px;margin-top:20px}
.step{display:flex;gap:16px;align-items:flex-start}
.step-num{font-family:var(--f-mono);font-weight:600;font-size:0.85rem;color:var(--accent-dark);background:var(--accent-ink);border:1px solid #FFD9C4;width:30px;height:30px;border-radius:8px;flex-shrink:0;display:flex;align-items:center;justify-content:center;}
.step-body h3{margin-bottom:4px;font-size:1rem}
.step-body p{font-size:0.92rem;margin-bottom:0}
.formula-box{background:var(--ink);color:#fff;border-radius:var(--radius);padding:20px 22px;margin:18px 0;font-family:var(--f-mono);font-size:0.88rem;line-height:1.8;overflow-x:auto;white-space:pre;}
.formula-box .v{color:#FFB28F}
.faq-list{margin-top:18px;border-top:1px solid var(--line)}
.faq-item{border-bottom:1px solid var(--line)}
.faq-q{width:100%;text-align:left;background:none;border:none;cursor:pointer;padding:18px 4px;display:flex;justify-content:space-between;align-items:center;gap:16px;font-family:var(--f-body);font-weight:600;font-size:0.96rem;color:var(--ink);}
.faq-q svg{flex-shrink:0;transition:transform .2s;color:var(--faint)}
.faq-item.open .faq-q svg{transform:rotate(45deg)}
.faq-a{max-height:0;overflow:hidden;transition:max-height .25s ease}
.faq-item.open .faq-a{max-height:280px}
.faq-a p{padding:0 4px 18px;color:var(--muted);font-size:0.92rem;max-width:640px}
.related-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(220px,1fr));gap:12px;margin-top:18px;}
.related-card{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius);padding:18px;display:flex;gap:12px;align-items:flex-start;transition:border-color .15s,transform .15s,box-shadow .15s;}
.related-card:hover{border-color:var(--accent);transform:translateY(-2px);box-shadow:var(--shadow-sm);text-decoration:none}
.related-icon{width:38px;height:38px;border-radius:10px;background:var(--accent-ink);display:flex;align-items:center;justify-content:center;font-size:1.1rem;flex-shrink:0;}
.related-card strong{display:block;color:var(--ink);font-size:0.92rem;margin-bottom:2px}
.related-card span{color:var(--muted);font-size:0.8rem}

/* ── HOME GRID ── */
.tool-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:14px}
@media (max-width:760px){.tool-grid{grid-template-columns:repeat(2,1fr)}}
@media (max-width:420px){.tool-grid{grid-template-columns:1fr}}
.tool-grid-card{background:var(--surface);border:1.5px solid var(--line);border-radius:var(--radius-lg);padding:26px 20px;display:flex;flex-direction:column;gap:14px;transition:transform .16s cubic-bezier(.34,1.56,.64,1),box-shadow .16s,border-color .16s;}
.tool-grid-card:hover{transform:translateY(-3px);box-shadow:var(--shadow-md);border-color:var(--accent);text-decoration:none}
.tool-grid-icon{width:46px;height:46px;border-radius:12px;background:var(--ink);color:var(--accent);display:flex;align-items:center;justify-content:center;font-size:1.3rem;}
.tool-grid-card strong{font-family:var(--f-display);font-weight:600;color:var(--ink);font-size:1.02rem}
.tool-grid-card p{color:var(--muted);font-size:0.85rem;margin:0}
.tool-grid-card .go{font-family:var(--f-mono);font-size:0.78rem;color:var(--blue);display:flex;align-items:center;gap:4px;margin-top:auto;}

/* ── STAT BOXES ── */
.stats-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:10px;margin-top:18px}
@media (max-width:560px){.stats-grid{grid-template-columns:repeat(2,1fr)}}
.stat-box{background:var(--surface-alt);border:1px solid var(--line);border-radius:12px;padding:16px 12px;text-align:center;transition:border-color .15s,background .15s;}
.stat-box:hover{border-color:var(--accent);background:var(--accent-ink)}
.stat-num{font-family:var(--f-mono);font-size:1.5rem;font-weight:600;color:var(--ink)}
.stat-lbl{font-size:0.72rem;color:var(--muted);margin-top:3px;font-weight:500}

/* ── CHECKBOXES ── */
.checkboxes{display:grid;grid-template-columns:1fr 1fr;gap:10px;margin-bottom:18px}
@media (max-width:480px){.checkboxes{grid-template-columns:1fr}}
.check-item{display:flex;align-items:center;gap:10px;background:var(--surface-alt);border:1.5px solid var(--line);border-radius:10px;padding:11px 14px;cursor:pointer;transition:all .15s;font-size:0.88rem;font-weight:500;user-select:none;}
.check-item:hover{border-color:var(--accent);background:var(--accent-ink)}
.check-item input[type="checkbox"]{width:17px;height:17px;cursor:pointer;accent-color:var(--accent);flex-shrink:0}

/* ── RANGE SLIDER ── */
.range-wrap{position:relative;padding:4px 0 6px}
input[type="range"]{width:100%;height:6px;-webkit-appearance:none;appearance:none;background:var(--line-strong);border-radius:3px;outline:none;cursor:pointer;}
input[type="range"]::-webkit-slider-thumb{-webkit-appearance:none;width:20px;height:20px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:var(--shadow-sm);cursor:pointer;}
input[type="range"]::-moz-range-thumb{width:20px;height:20px;border-radius:50%;background:var(--accent);border:3px solid #fff;box-shadow:var(--shadow-sm);cursor:pointer;}
.range-labels{display:flex;justify-content:space-between;font-size:0.75rem;color:var(--faint);margin-top:4px}

/* ── STRENGTH BAR ── */
.strength-track{height:6px;border-radius:3px;background:rgba(255,255,255,0.15);margin-top:14px;overflow:hidden}
.strength-fill{height:100%;border-radius:3px;width:0;transition:width .35s,background .35s}
.strength-meta{display:flex;justify-content:space-between;font-size:0.78rem;color:#C9CDD8;margin-top:6px;font-family:var(--f-mono)}
.pw-output{display:flex;gap:10px;align-items:center}
.pw-output input{flex:1;font-family:var(--f-mono);font-size:1rem;letter-spacing:0.03em}

/* ── AD SLOT ── */
.ad-slot{max-width:var(--maxw);margin:8px auto;padding:0 24px}
.ad-slot-inner{border:1.5px dashed var(--line-strong);border-radius:var(--radius);padding:20px;text-align:center;color:var(--faint);font-size:0.78rem;font-family:var(--f-mono);background:var(--surface-alt);}

/* ── FOOTER ── */
footer.site{border-top:1px solid var(--line);margin-top:24px;padding:36px 0 28px}
.footer-grid{display:flex;justify-content:space-between;flex-wrap:wrap;gap:24px}
.footer-brand .brand{margin-bottom:8px}
.footer-brand p{color:var(--muted);font-size:0.86rem;max-width:320px}
.footer-cols{display:flex;gap:48px;flex-wrap:wrap}
.footer-col h4{font-family:var(--f-mono);font-size:0.72rem;text-transform:uppercase;letter-spacing:0.07em;color:var(--faint);margin-bottom:12px;}
.footer-col a{display:block;color:var(--muted);font-size:0.88rem;margin-bottom:9px}
.footer-col a:hover{color:var(--ink)}
.footer-bottom{margin-top:30px;padding-top:20px;border-top:1px solid var(--line);display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:0.8rem;color:var(--faint);}

/* ── 404 ── */
.error-hero{text-align:center;padding:90px 24px 60px}
.error-code{font-family:var(--f-mono);font-size:clamp(3rem,12vw,6rem);font-weight:600;color:var(--line-strong);letter-spacing:-0.02em;line-height:1;}

/* ── UTILS ── */
.center{text-align:center}
.mt-0{margin-top:0}

/* ── TOAST ── */
#toast{position:fixed;bottom:24px;left:50%;transform:translateX(-50%) translateY(100px);background:var(--ink);color:#fff;padding:12px 22px;border-radius:50px;font-size:0.86rem;font-weight:500;box-shadow:var(--shadow-lg);z-index:9999;transition:transform .3s cubic-bezier(.34,1.56,.64,1);white-space:nowrap;display:flex;align-items:center;gap:8px;}
#toast.show{transform:translateX(-50%) translateY(0)}
#scrollTop{position:fixed;bottom:24px;right:24px;width:44px;height:44px;border-radius:50%;background:var(--ink);color:var(--accent);border:none;display:flex;align-items:center;justify-content:center;cursor:pointer;box-shadow:var(--shadow-md);opacity:0;transition:opacity .25s,transform .25s;z-index:100;transform:scale(0.8);}
#scrollTop.show{opacity:1;transform:scale(1)}
#scrollTop:hover{background:#262B38}

@media (prefers-reduced-motion:reduce){*{animation:none!important;transition:none!important;scroll-behavior:auto!important}}