.gb-calc *,.gb-calc *::before,.gb-calc *::after{box-sizing:border-box;margin:0;padding:0}
:root{
  --gb-red:#EF4136;--gb-green:#8DC63F;--gb-dark:#1A1A1A;--gb-charcoal:#2D2D2D;--gb-mid:#444444;
  --gb-light:#F5F5F5;--gb-border:#E0E0E0;--gb-white:#FFFFFF;--gb-bg:#F8F8F8;
  --gb-card:#FFFFFF;--gb-card-border:#E0E0E0;--gb-text:#1A1A1A;--gb-text-mid:#444444;--gb-text-muted:#888888;
  --gb-grid-line:rgba(0,0,0,0.05);--gb-nnt-bg:#2D2D2D;--gb-nnt-card:rgba(255,255,255,0.08);
  --gb-nnt-card-border:rgba(255,255,255,0.12);--gb-nnt-text:#FFFFFF;--gb-nnt-muted:rgba(255,255,255,0.6);
  --gb-nnt-unit:rgba(255,255,255,0.5);--gb-nnt-highlight-bg:rgba(141,198,63,0.1);
  --gb-assumptions-bg:#F5F5F5;--gb-footer-border:#E0E0E0;--gb-tooltip-bg:#1A1A1A;--gb-tooltip-text:#FFFFFF;
  --font-display:'Big Shoulders Display',sans-serif;--font-body:'Work Sans',sans-serif;
}
[data-theme="dark"]{
  --gb-bg:#111111;--gb-card:#1E1E1E;--gb-card-border:#333333;--gb-text:#F0F0F0;--gb-text-mid:#BBBBBB;
  --gb-text-muted:#777777;--gb-grid-line:rgba(255,255,255,0.06);--gb-nnt-bg:#0A0A0A;
  --gb-nnt-card:rgba(255,255,255,0.05);--gb-nnt-card-border:rgba(255,255,255,0.08);
  --gb-assumptions-bg:#1A1A1A;--gb-footer-border:#333333;--gb-tooltip-bg:#F0F0F0;--gb-tooltip-text:#111111;
  --gb-border:#333333;
}
.gb-calc{font-family:var(--font-body);background:var(--gb-bg);color:var(--gb-text);-webkit-font-smoothing:antialiased;transition:background .3s,color .3s}
.gb-calc-page{max-width:960px;margin:0 auto;padding:32px 24px 64px}
.gb-calc header{display:flex;align-items:center;justify-content:space-between;margin-bottom:48px;padding-bottom:24px;border-bottom:3px solid var(--gb-red)}

.logo-img{height:48px;width:auto}
.logo-img.dark{display:none}
[data-theme="dark"] .logo-img.light{display:none}
[data-theme="dark"] .logo-img.dark{display:block}
.header-right{display:flex;align-items:center;gap:16px}
.subtitle{font-family:var(--font-display);font-weight:500;font-size:16px;letter-spacing:2px;text-transform:uppercase;color:var(--gb-text-mid)}
.theme-toggle{position:relative;width:44px;height:24px;background:var(--gb-card-border);border-radius:12px;cursor:pointer;border:none;padding:0;transition:background .2s;flex-shrink:0}
.theme-toggle::after{content:'';position:absolute;top:3px;left:3px;width:18px;height:18px;border-radius:50%;background:var(--gb-white);transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,0.2)}
[data-theme="dark"] .theme-toggle{background:var(--gb-green)}
[data-theme="dark"] .theme-toggle::after{transform:translateX(20px)}
.theme-icons{display:flex;align-items:center;gap:4px;font-size:14px;color:var(--gb-text-muted)}
.gb-calc h1{font-family:var(--font-display);font-weight:700;font-size:42px;line-height:1.1;color:var(--gb-text);margin-bottom:8px;text-transform:uppercase}
h1 span{color:var(--gb-red)}
.intro{font-size:16px;color:var(--gb-text-mid);line-height:1.6;max-width:680px;margin-bottom:24px}
.intro-link{color:var(--gb-red);text-decoration:none;font-weight:600;border-bottom:1px solid transparent;transition:border-color .15s}
.intro-link:hover{border-bottom-color:var(--gb-red)}
.intro-toggle{color:var(--gb-green);text-decoration:none;font-weight:600;cursor:pointer;border-bottom:1px solid transparent;transition:border-color .15s;margin-left:4px}
.intro-toggle:hover{border-bottom-color:var(--gb-green)}
.topbar{display:flex;justify-content:flex-end;align-items:center;margin-bottom:24px}
.currency-selector{display:flex;align-items:center;gap:12px}
.currency-label{font-family:var(--font-display);font-weight:600;font-size:13px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gb-text-mid)}
.currency-buttons{display:flex;background:var(--gb-card);border:1px solid var(--gb-card-border);border-radius:8px;overflow:hidden}
.currency-btn{font-family:var(--font-display);font-weight:600;font-size:13px;letter-spacing:1px;padding:8px 16px;background:transparent;color:var(--gb-text-mid);border:none;cursor:pointer;transition:background .15s,color .15s}
.currency-btn:hover{color:var(--gb-text)}
.currency-btn.active{background:var(--gb-red);color:#fff}
.controls{display:grid;grid-template-columns:1fr 1fr 1fr;gap:24px;margin-bottom:40px}
@media(max-width:900px){.controls{grid-template-columns:1fr 1fr}}
@media(max-width:640px){.controls{grid-template-columns:1fr}}
.control-value-input{display:flex;align-items:baseline;gap:6px;margin-bottom:4px}
.currency-symbol{font-family:var(--font-display);font-weight:600;font-size:24px;color:var(--gb-text-mid)}
.control-value-input input[type=text]{font-family:var(--font-display);font-weight:700;font-size:36px;color:var(--gb-text);background:transparent;border:none;border-bottom:2px solid var(--gb-red);width:100%;padding:0 0 4px 0;outline:none;transition:border-bottom-width .15s}
.control-value-input input[type=text]:focus{border-bottom-width:3px}
.control-hint{font-size:11px;color:var(--gb-text-muted);margin-top:8px;font-style:italic}
.nnt-link{color:var(--gb-green);text-decoration:none;font-weight:600;border-bottom:1px solid transparent;transition:border-color .15s}
.nnt-link:hover{border-bottom-color:var(--gb-green)}
.nnt-title span{color:var(--gb-green)}
.control-card{background:var(--gb-card);border:1px solid var(--gb-card-border);border-radius:12px;padding:24px;transition:background .3s,border-color .3s;position:relative;overflow:visible}
.control-label{font-family:var(--font-display);font-weight:600;font-size:18px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gb-text-mid);margin-bottom:16px;line-height:1.2;min-height:calc(18px * 1.2 * 2)}
.control-value{font-family:var(--font-display);font-weight:700;font-size:42px;color:var(--gb-text);margin-bottom:12px}
.control-value .unit{font-size:20px;font-weight:500;color:var(--gb-text-mid)}
.gb-calc input[type=range]{-webkit-appearance:none;appearance:none;width:100%;height:6px;border-radius:3px;background:var(--gb-card-border);outline:none;cursor:pointer}
.gb-calc input[type=range]::-webkit-slider-thumb{-webkit-appearance:none;width:22px;height:22px;border-radius:50%;background:var(--gb-red);border:3px solid var(--gb-white);box-shadow:0 2px 6px rgba(0,0,0,0.2);cursor:pointer}
.gb-calc input[type=range]::-moz-range-thumb{width:22px;height:22px;border-radius:50%;background:var(--gb-red);border:3px solid var(--gb-white);box-shadow:0 2px 6px rgba(0,0,0,0.2);cursor:pointer}
.metrics{display:grid;grid-template-columns:repeat(4,1fr);gap:16px;margin-bottom:40px}
.metrics.metrics-3{grid-template-columns:repeat(3,1fr)}
@media(max-width:640px){.metrics{grid-template-columns:repeat(2,1fr)}.metrics.metrics-3{grid-template-columns:1fr}}
.metric-card{background:var(--gb-card);border:1px solid var(--gb-card-border);border-radius:12px;padding:24px;position:relative;overflow:visible;transition:background .3s,border-color .3s;cursor:default}
.metric-card::before{content:'';position:absolute;top:0;left:0;right:0;height:3px;border-radius:12px 12px 0 0}
.metric-card.green::before{background:var(--gb-green)}
.metric-card.red::before{background:var(--gb-red)}
.metric-card.dark::before{background:var(--gb-charcoal)}
[data-theme="dark"] .metric-card.dark::before{background:#999}
.metric-label{font-family:var(--font-display);font-weight:600;font-size:16px;letter-spacing:1.5px;text-transform:uppercase;color:var(--gb-text-mid);margin-bottom:10px}
.metric-value{font-family:var(--font-display);font-weight:700;font-size:40px;color:var(--gb-text)}
.metric-value.green-text{color:#5A9E1E}
[data-theme="dark"] .metric-value.green-text{color:var(--gb-green)}
.metric-value.red-text{color:var(--gb-red)}
.metric-unit{font-size:24px;font-weight:600;color:var(--gb-text-mid);margin-left:2px}
.metric-sublabel{font-size:12px;color:var(--gb-text-muted);margin-top:6px;font-style:italic}
.info-icon{display:inline-flex;align-items:center;justify-content:center;width:18px;height:18px;border-radius:50%;border:1.5px solid var(--gb-text-muted);color:var(--gb-text-muted);font-family:var(--font-body);font-size:11px;font-weight:600;font-style:italic;cursor:help;position:relative;flex-shrink:0;transition:border-color .2s,color .2s;line-height:1}
.info-icon:hover{border-color:var(--gb-red);color:var(--gb-red)}
.info-tip{position:absolute;bottom:calc(100% + 8px);left:50%;transform:translateX(-50%);background:var(--gb-tooltip-bg);color:var(--gb-tooltip-text);font-family:var(--font-body);font-size:12px;font-style:normal;font-weight:400;line-height:1.5;letter-spacing:0;text-transform:none;padding:10px 14px;border-radius:8px;width:220px;pointer-events:none;opacity:0;transition:opacity .15s;box-shadow:0 4px 14px rgba(0,0,0,0.18);z-index:20;text-align:left}
.info-tip::after{content:'';position:absolute;top:100%;left:50%;transform:translateX(-50%);border:5px solid transparent;border-top-color:var(--gb-tooltip-bg)}
.info-icon:hover .info-tip{opacity:1}
.chart-section{background:var(--gb-card);border:1px solid var(--gb-card-border);border-radius:12px;padding:32px;margin-bottom:40px;transition:background .3s,border-color .3s}
.chart-header{display:flex;align-items:flex-start;justify-content:space-between;gap:16px;margin-bottom:4px}
.chart-title{font-family:var(--font-display);font-weight:600;font-size:24px;color:var(--gb-text);text-transform:uppercase}
.chart-subtitle{font-size:14px;color:var(--gb-text-mid);margin-bottom:24px}
.chart-wrap{position:relative;width:100%;height:360px}
.legend{display:flex;flex-wrap:wrap;gap:16px;margin-top:16px;font-size:14px;color:var(--gb-text-mid)}
.legend-dot{display:inline-block;width:12px;height:12px;border-radius:3px;margin-right:6px;vertical-align:middle}
.download-btn{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border-radius:8px;border:1px solid var(--gb-card-border);background:transparent;color:var(--gb-text-mid);cursor:pointer;transition:all .2s;flex-shrink:0;position:relative}
.download-btn:hover{background:var(--gb-bg);border-color:var(--gb-red);color:var(--gb-red)}
.download-btn svg{width:18px;height:18px}
.download-btn::after{content:attr(data-tooltip);position:absolute;bottom:calc(100% + 6px);right:0;background:var(--gb-tooltip-bg);color:var(--gb-tooltip-text);font-family:var(--font-body);font-size:11px;line-height:1.4;padding:6px 10px;border-radius:6px;white-space:nowrap;opacity:0;pointer-events:none;transition:opacity .15s;box-shadow:0 4px 14px rgba(0,0,0,0.18)}
.download-btn:hover::after{opacity:1}
.rollout-section{background:var(--gb-card);border:1px solid var(--gb-card-border);border-radius:12px;padding:32px;margin-bottom:40px;transition:background .3s,border-color .3s}
.rollout-controls{display:flex;align-items:center;gap:8px;flex-wrap:wrap}
.rollout-select{font-family:var(--font-body);font-size:14px;font-weight:500;padding:8px 14px;border-radius:8px;border:1px solid var(--gb-card-border);background:var(--gb-bg);color:var(--gb-text);cursor:pointer;transition:border-color .2s}
.rollout-select:focus{outline:none;border-color:var(--gb-red)}
.diff-toggle-wrap{display:inline-flex;align-items:center;gap:10px;cursor:pointer;user-select:none;padding:6px 4px}
.diff-toggle-wrap input[type=checkbox]{position:absolute;opacity:0;pointer-events:none}
.diff-toggle-track{position:relative;width:38px;height:22px;background:var(--gb-card-border);border-radius:11px;transition:background .2s;flex-shrink:0}
.diff-toggle-track::after{content:'';position:absolute;top:3px;left:3px;width:16px;height:16px;border-radius:50%;background:var(--gb-white);transition:transform .2s;box-shadow:0 1px 3px rgba(0,0,0,0.2)}
.diff-toggle-wrap input:checked+.diff-toggle-track{background:var(--gb-text)}
.diff-toggle-wrap input:checked+.diff-toggle-track::after{transform:translateX(16px)}
.diff-toggle-label{font-family:var(--font-body);font-size:13px;font-weight:500;color:var(--gb-text-mid)}
.rollout-subtitle{font-size:14px;color:var(--gb-text-mid);margin-bottom:24px}
.variable-inputs{display:grid;grid-template-columns:repeat(5,1fr);gap:12px;margin-bottom:24px}
@media(max-width:640px){.variable-inputs{grid-template-columns:repeat(3,1fr)}}
.var-input-group{text-align:center}
.var-input-group label{display:block;font-family:var(--font-display);font-weight:500;font-size:14px;letter-spacing:1px;text-transform:uppercase;color:var(--gb-text-muted);margin-bottom:6px}
.var-input-group input[type=number]{width:100%;font-family:var(--font-display);font-size:22px;font-weight:600;text-align:center;padding:8px 4px;border-radius:8px;border:1px solid var(--gb-card-border);background:var(--gb-bg);color:var(--gb-text);transition:border-color .2s}
.var-input-group input[type=number]:focus{outline:none;border-color:var(--gb-red)}
.var-remaining{font-size:14px;color:var(--gb-text-muted);margin-bottom:16px}
.var-remaining span{font-weight:600;color:var(--gb-red)}
.var-remaining.ok span{color:var(--gb-green)}
.rollout-chart-wrap{position:relative;width:100%;height:360px}
.rollout-insight{margin-top:20px;padding:16px 20px;border-radius:10px;background:var(--gb-assumptions-bg);transition:background .3s}
.rollout-insight p{font-size:15px;color:var(--gb-text-mid);line-height:1.6}
.rollout-insight strong{color:var(--gb-text);font-weight:600}
.nnt-section{background:var(--gb-nnt-bg);border-radius:12px;padding:32px;margin-bottom:40px;color:var(--gb-nnt-text);transition:background .3s}
.nnt-title{font-family:var(--font-display);font-weight:700;font-size:28px;margin-bottom:10px;text-transform:uppercase}
.nnt-subtitle{font-size:16px;color:var(--gb-nnt-muted);margin-bottom:24px;line-height:1.5}
.nnt-grid{display:grid;grid-template-columns:1fr;gap:16px}
@media(max-width:640px){.nnt-grid{grid-template-columns:1fr}}
.nnt-card{background:var(--gb-nnt-card);border:1px solid var(--gb-nnt-card-border);border-radius:10px;padding:24px;text-align:center;transition:background .3s,border-color .3s}
.nnt-card.highlight{border-color:var(--gb-green);background:var(--gb-nnt-highlight-bg)}
.nnt-card-label{font-size:15px;color:var(--gb-nnt-muted);text-transform:uppercase;letter-spacing:1px;font-family:var(--font-display);font-weight:500;margin-bottom:8px}
.nnt-card-value{font-family:var(--font-display);font-weight:700;font-size:48px;color:var(--gb-nnt-text)}
.nnt-card-unit{font-size:14px;color:var(--gb-nnt-unit);margin-top:4px}
.assumptions{background:var(--gb-assumptions-bg);border-radius:12px;padding:24px;margin-bottom:40px;transition:background .3s}
.assumptions h3{font-family:var(--font-display);font-weight:600;font-size:20px;color:var(--gb-text);margin-bottom:12px;text-transform:uppercase}
.assumptions p{font-size:14px;color:var(--gb-text-mid);line-height:1.6}
.gb-calc footer{text-align:center;padding-top:32px;border-top:1px solid var(--gb-footer-border)}
.gb-calc footer p{font-size:13px;color:var(--gb-text)}
.gb-calc footer a{color:var(--gb-text);text-decoration:none;font-weight:600}
.gb-calc footer a:hover{text-decoration:underline}
.footer-tagline{font-family:var(--font-display);font-weight:600;font-size:12px;letter-spacing:2px;text-transform:uppercase;color:var(--gb-red);margin-top:8px}

/* ---------------------------------------------------------------------------
   Save & Share button
--------------------------------------------------------------------------- */
.topbar{display:flex;justify-content:space-between;align-items:center;margin-bottom:24px}
.gb-save-btn{display:inline-flex;align-items:center;gap:8px;font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:1.5px;text-transform:uppercase;padding:10px 20px;border-radius:8px;border:2px solid var(--gb-green);background:transparent;color:var(--gb-green);cursor:pointer;transition:background .15s,color .15s}
.gb-save-btn:hover{background:var(--gb-green);color:#fff}

/* ---------------------------------------------------------------------------
   Lead capture modal
--------------------------------------------------------------------------- */
.gb-modal-overlay{position:fixed;inset:0;background:rgba(0,0,0,0.55);display:flex;align-items:center;justify-content:center;z-index:9999;padding:24px}
.gb-modal{background:var(--gb-card);border-radius:16px;padding:40px;width:100%;max-width:480px;position:relative;box-shadow:0 24px 64px rgba(0,0,0,0.25);transition:background .3s}
.gb-modal-close{position:absolute;top:16px;right:16px;width:32px;height:32px;border-radius:50%;border:none;background:var(--gb-card-border);color:var(--gb-text-mid);font-size:20px;line-height:1;cursor:pointer;display:flex;align-items:center;justify-content:center;transition:background .15s}
.gb-modal-close:hover{background:var(--gb-red);color:#fff}
.gb-modal-header{display:flex;align-items:flex-start;gap:16px;margin-bottom:28px}
.gb-modal-icon{width:44px;height:44px;background:rgba(141,198,63,0.12);border-radius:10px;display:flex;align-items:center;justify-content:center;flex-shrink:0}
.gb-modal-title{font-family:var(--font-display);font-weight:700;font-size:22px;text-transform:uppercase;color:var(--gb-text);margin-bottom:6px}
.gb-modal-subtitle{font-size:14px;color:var(--gb-text-mid);line-height:1.5}
.gb-field{margin-bottom:20px}
.gb-field-label{display:block;font-family:var(--font-display);font-weight:600;font-size:13px;letter-spacing:1px;text-transform:uppercase;color:var(--gb-text-mid);margin-bottom:8px}
.gb-field-input{width:100%;font-family:var(--font-body);font-size:16px;padding:12px 16px;border-radius:8px;border:1.5px solid var(--gb-card-border);background:var(--gb-bg);color:var(--gb-text);transition:border-color .15s;outline:none}
.gb-field-input:focus{border-color:var(--gb-red)}
.gb-field-error{font-size:13px;color:var(--gb-red);margin-bottom:16px;min-height:18px}
.gb-submit-btn{width:100%;font-family:var(--font-display);font-weight:700;font-size:15px;letter-spacing:1.5px;text-transform:uppercase;padding:16px;border-radius:8px;border:none;background:var(--gb-red);color:#fff;cursor:pointer;transition:opacity .15s}
.gb-submit-btn:hover{opacity:0.88}
.gb-submit-btn:disabled{opacity:0.5;cursor:not-allowed}
.gb-privacy{font-size:12px;color:var(--gb-text-muted);text-align:center;margin-top:12px}
.gb-success-icon{text-align:center;margin-bottom:16px}
.gb-success-title{font-family:var(--font-display);font-weight:700;font-size:24px;text-transform:uppercase;color:var(--gb-text);text-align:center;margin-bottom:8px}
.gb-success-msg{font-size:14px;color:var(--gb-text-mid);text-align:center;margin-bottom:20px;line-height:1.5}
.gb-share-row{display:flex;gap:8px;margin-bottom:16px}
.gb-share-input{flex:1;font-family:monospace;font-size:12px;padding:10px 12px;border-radius:8px;border:1.5px solid var(--gb-card-border);background:var(--gb-bg);color:var(--gb-text);outline:none;min-width:0}
.gb-copy-btn{font-family:var(--font-display);font-weight:700;font-size:13px;letter-spacing:1px;text-transform:uppercase;padding:10px 16px;border-radius:8px;border:none;background:var(--gb-charcoal);color:#fff;cursor:pointer;white-space:nowrap;flex-shrink:0;transition:background .15s}
[data-theme="dark"] .gb-copy-btn{background:#555}
.gb-copy-btn:hover{background:var(--gb-green)}
.gb-done-btn{width:100%;font-family:var(--font-display);font-weight:700;font-size:14px;letter-spacing:1.5px;text-transform:uppercase;padding:14px;border-radius:8px;border:2px solid var(--gb-card-border);background:transparent;color:var(--gb-text-mid);cursor:pointer;transition:border-color .15s,color .15s}
.gb-done-btn:hover{border-color:var(--gb-red);color:var(--gb-red)}