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

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

:root{
  --green:#34c759;
  --green-hover:#30d158;
  --green-dark:#248a3d;
  --green-light:rgba(52,199,89,.1);
  --red:#ff3b30;
  --amber:#ff9500;
  --text-primary:#1d1d1f;
  --text-secondary:#6e6e73;
  --text-tertiary:#86868b;
  --bg:#fff;
  --bg-secondary:#f5f5f7;
  --bg-tertiary:#fbfbfd;
  --border:rgba(0,0,0,0.08);
  --border-medium:rgba(0,0,0,0.14);
  --radius-sm:8px;
  --radius-md:12px;
  --radius-lg:18px;
  --font:'Outfit',-apple-system,BlinkMacSystemFont,'Helvetica Neue',sans-serif;
  --font-mono:'SF Mono','Fira Code',monospace;
  --nav-height:52px;
  --max-w:1080px;
}

html{font-size:16px;-webkit-font-smoothing:antialiased}
body{font-family:var(--font);background:var(--bg);color:var(--text-primary);line-height:1.6}

/* ── Nav ── */
nav{
  position:sticky;top:0;z-index:100;
  height:var(--nav-height);
  background:rgba(255,255,255,0.85);
  backdrop-filter:saturate(180%) blur(20px);
  -webkit-backdrop-filter:saturate(180%) blur(20px);
  border-bottom:0.5px solid var(--border);
  display:flex;align-items:center;
}
.nav-inner{max-width:var(--max-w);width:100%;margin:0 auto;padding:0 24px;display:flex;align-items:center;justify-content:space-between}
.nav-logo{font-size:18px;font-weight:700;color:var(--text-primary);text-decoration:none;letter-spacing:-.4px}
.nav-logo span{color:var(--green)}
.nav-links{display:flex;align-items:center;gap:4px}
.nav-links a{font-size:14px;color:var(--text-secondary);text-decoration:none;padding:5px 10px;border-radius:7px;transition:background .15s,color .15s}
.nav-links a:hover{background:var(--bg-secondary);color:var(--text-primary)}
.nav-links a.active{color:var(--text-primary);font-weight:500}

/* ── Buttons ── */
.btn{display:inline-flex;align-items:center;justify-content:center;gap:6px;font-family:var(--font);font-size:14px;font-weight:500;border:none;cursor:pointer;transition:all .15s;text-decoration:none;border-radius:980px;padding:8px 18px;white-space:nowrap}
.btn-primary{background:var(--green);color:#fff}
.btn-primary:hover{background:var(--green-hover)}
.btn-primary:active{transform:scale(.98)}
.btn-secondary{background:var(--bg-secondary);color:var(--text-primary);border:0.5px solid var(--border-medium)}
.btn-secondary:hover{background:#e8e8ed}
.btn-secondary:active{transform:scale(.98)}
.btn-sm{font-size:13px;padding:5px 13px}
.btn-lg{font-size:16px;padding:11px 26px}

/* ── Calculator layout ── */
.calc-hero{text-align:center;padding:56px 24px 40px;max-width:var(--max-w);margin:0 auto}
.calc-hero h1{font-size:clamp(28px,4vw,44px);font-weight:800;letter-spacing:-.8px;color:var(--text-primary);margin-bottom:10px}
.calc-hero p{font-size:17px;color:var(--text-secondary);max-width:520px;margin:0 auto 24px}
.tool-badges{display:flex;gap:8px;justify-content:center;flex-wrap:wrap}
.badge{font-size:12px;font-weight:500;color:var(--text-secondary);background:var(--bg-secondary);border:0.5px solid var(--border);border-radius:980px;padding:4px 12px}

.calc-section{max-width:860px;margin:0 auto;padding:0 24px 56px}

/* ── Calculator card ── */
.calc-card{background:var(--bg);border:0.5px solid var(--border-medium);border-radius:var(--radius-lg);overflow:hidden;margin-bottom:20px}
.calc-card-header{padding:16px 20px;border-bottom:0.5px solid var(--border);background:var(--bg-tertiary);display:flex;align-items:center;justify-content:space-between}
.calc-card-title{font-size:13px;font-weight:600;color:var(--text-tertiary);text-transform:uppercase;letter-spacing:.06em}
.calc-body{padding:24px}

/* ── Form elements ── */
.field-group{margin-bottom:18px}
.field-label{display:block;font-size:13px;font-weight:600;color:var(--text-secondary);margin-bottom:6px}
.field-hint{font-size:11px;color:var(--text-tertiary);margin-top:4px}
.field-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
@media(max-width:560px){.field-row{grid-template-columns:1fr}}

.input-wrap{position:relative}
.input-wrap input,.input-wrap select{
  width:100%;font-family:var(--font);font-size:15px;
  background:var(--bg-secondary);border:0.5px solid var(--border-medium);
  border-radius:var(--radius-sm);padding:10px 14px;outline:none;
  color:var(--text-primary);transition:border-color .15s;
  appearance:none;-webkit-appearance:none;
}
.input-wrap input:focus,.input-wrap select:focus{border-color:var(--green)}
.input-unit{position:absolute;right:12px;top:50%;transform:translateY(-50%);font-size:13px;color:var(--text-tertiary);pointer-events:none}
select{background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M0 0l6 8 6-8z' fill='%2386868b'/%3E%3C/svg%3E");background-repeat:no-repeat;background-position:right 12px center;padding-right:32px}

/* ── Result card ── */
.result-card{background:linear-gradient(135deg,#f0fdf4 0%,#dcfce7 100%);border:0.5px solid rgba(52,199,89,.25);border-radius:var(--radius-lg);padding:24px;margin-top:20px}
.result-main{text-align:center;margin-bottom:20px}
.result-label{font-size:13px;font-weight:600;color:var(--green-dark);text-transform:uppercase;letter-spacing:.06em;margin-bottom:6px}
.result-value{font-size:42px;font-weight:800;color:var(--green-dark);letter-spacing:-1px}
.result-sub{font-size:14px;color:var(--green-dark);opacity:.7;margin-top:4px}
.result-breakdown{display:grid;grid-template-columns:1fr 1fr;gap:10px}
@media(max-width:480px){.result-breakdown{grid-template-columns:1fr}}
.breakdown-item{background:rgba(255,255,255,.7);border-radius:var(--radius-sm);padding:10px 14px}
.breakdown-label{font-size:11px;color:var(--text-tertiary);font-weight:600;text-transform:uppercase;letter-spacing:.04em;margin-bottom:3px}
.breakdown-value{font-size:15px;font-weight:600;color:var(--text-primary)}
.breakdown-value.neg{color:var(--red)}
.breakdown-value.pos{color:var(--green-dark)}

/* ── Info sections ── */
.info-section{background:var(--bg-secondary);padding:48px 24px}
.info-inner{max-width:var(--max-w);margin:0 auto}
.info-inner h2{font-size:24px;font-weight:700;letter-spacing:-.3px;margin-bottom:28px}
.info-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(240px,1fr));gap:16px}
.info-card{background:var(--bg);border:0.5px solid var(--border);border-radius:var(--radius-lg);padding:20px}
.info-card h3{font-size:15px;font-weight:600;margin-bottom:6px}
.info-card p{font-size:14px;color:var(--text-secondary);line-height:1.6}

/* ── FAQ ── */
.faq-section{padding:48px 24px}
.faq-inner{max-width:680px;margin:0 auto}
.faq-inner h2{font-size:24px;font-weight:700;letter-spacing:-.3px;margin-bottom:24px}
.faq-item{border-bottom:0.5px solid var(--border);padding:16px 0}
.faq-q{font-size:15px;font-weight:600;cursor:pointer;display:flex;justify-content:space-between;align-items:center;gap:12px;user-select:none}
.faq-q::after{content:"＋";font-size:16px;color:var(--text-tertiary);flex-shrink:0;transition:transform .2s}
.faq-item.open .faq-q::after{transform:rotate(45deg)}
.faq-a{font-size:14px;color:var(--text-secondary);line-height:1.7;margin-top:10px;display:none}
.faq-item.open .faq-a{display:block}

/* ── Related ── */
.related-section{background:var(--bg-secondary);padding:36px 24px}
.related-inner{max-width:var(--max-w);margin:0 auto}
.related-inner h3{font-size:17px;font-weight:600;margin-bottom:14px}
.related-grid{display:flex;flex-wrap:wrap;gap:10px}
.related-link{font-size:14px;color:var(--text-primary);text-decoration:none;background:var(--bg);border:0.5px solid var(--border-medium);border-radius:var(--radius-sm);padding:8px 16px;transition:border-color .15s,color .15s}
.related-link:hover{border-color:var(--green);color:var(--green)}

/* ── Homepage ── */
.home-hero{text-align:center;padding:88px 24px 72px;max-width:var(--max-w);margin:0 auto}
.home-hero .eyebrow{font-size:13px;font-weight:500;color:var(--green);letter-spacing:.04em;text-transform:uppercase;margin-bottom:16px}
.home-hero h1{font-size:clamp(38px,6vw,68px);font-weight:800;letter-spacing:-1.5px;line-height:1.05;color:var(--text-primary);margin-bottom:18px}
.home-hero p{font-size:19px;color:var(--text-secondary);max-width:540px;margin:0 auto 32px;line-height:1.5}
.home-hero-actions{display:flex;gap:12px;justify-content:center;flex-wrap:wrap}

.privacy-strip{background:var(--bg);border-top:0.5px solid var(--border);border-bottom:0.5px solid var(--border);padding:18px 24px;display:flex;align-items:center;justify-content:center;gap:32px;flex-wrap:wrap}
.privacy-item{display:flex;align-items:center;gap:8px;font-size:13px;color:var(--text-secondary)}
.privacy-item::before{content:"✓";color:var(--green);font-weight:700}

.tools-section{background:var(--bg-secondary);padding:56px 24px}
.tools-inner{max-width:var(--max-w);margin:0 auto}
.section-header{display:flex;align-items:baseline;gap:12px;margin-bottom:20px}
.section-header h2{font-size:22px;font-weight:700;letter-spacing:-.3px}
.section-header span{font-size:13px;color:var(--text-tertiary)}
.tools-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));gap:12px}
.tool-card{background:var(--bg);border:0.5px solid var(--border);border-radius:var(--radius-lg);padding:22px 20px;text-decoration:none;color:inherit;transition:border-color .2s,transform .15s;display:block}
.tool-card:hover{border-color:rgba(52,199,89,.5);transform:translateY(-1px)}
.tool-icon{font-size:26px;margin-bottom:10px}
.tool-card h3{font-size:15px;font-weight:600;margin-bottom:5px}
.tool-card p{font-size:13px;color:var(--text-secondary);line-height:1.5}

/* ── Ad unit ── */
.ad-unit{background:var(--bg-secondary);border:0.5px dashed var(--border-medium);border-radius:var(--radius-md);min-height:90px;display:flex;align-items:center;justify-content:center;margin:24px 0;font-size:12px;color:var(--text-tertiary)}

/* ── Footer ── */
footer{padding:32px 24px;border-top:0.5px solid var(--border);max-width:var(--max-w);margin:0 auto;display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:12px}
.footer-left{font-size:13px;color:var(--text-tertiary)}
.footer-links{display:flex;gap:20px}
.footer-links a{font-size:13px;color:var(--text-tertiary);text-decoration:none}
.footer-links a:hover{color:var(--text-primary)}

/* ── Utilities ── */
.sr-only{position:absolute;width:1px;height:1px;overflow:hidden;clip:rect(0,0,0,0)}
@media(max-width:600px){.nav-links{display:none}.home-hero h1{font-size:36px}footer{flex-direction:column;align-items:flex-start}.privacy-strip{gap:16px;justify-content:flex-start}}