:root {
  color-scheme:light;
  --ink:#172a45;
  --muted:#596779;
  --blue:#285ac8;
  --line:#dce3ec;
  --page:#f6f8fb;
  --soft:#eef3fb;
  --orange:#99520b;
  --radius:16px;
  font-family:Inter,ui-sans-serif,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  color:var(--ink);
  background:var(--page);
  font-synthesis:none
}

* {
  box-sizing:border-box
}

html {
  scroll-behavior:smooth;
  scroll-padding-top:100px
}

body {
  margin:0;
  font-size:16px;
  line-height:1.5
}

button,input,select,textarea {
  font:inherit
}

button,a,input,select,textarea {
  -webkit-tap-highlight-color:transparent
}

button,a {
  touch-action:manipulation
}

a {
  color:inherit;
  text-decoration:none
}

button {
  cursor:pointer
}

button:disabled {
  cursor:wait;
  opacity:.65
}

button {
  border:1px solid var(--line);
  background:white;
  color:var(--ink);
  border-radius:8px;
  min-height:44px;
  padding:9px 15px;
  font-size:.875rem;
  font-weight:600
}

button:hover {
  background:var(--soft);
  border-color:#a5b6d0
}

a:hover {
  color:var(--blue)
}

:focus-visible {
  outline:3px solid var(--blue);
  outline-offset:4px
}

input:focus,textarea:focus,select:focus {
  border-color:var(--blue)
}

[hidden] {
  display:none!important
}

.wrap {
  width:min(1160px,calc(100% - 64px));
  margin-inline:auto
}

.site-header {
  border-bottom:1px solid var(--line);
  background:#fff;
  position:sticky;
  top:0;
  z-index:10
}

.header-inner {
  display:flex;
  align-items:center;
  justify-content:space-between;
  min-height:78px;
  gap:24px
}

.brand {
  min-height:44px;
  display:flex;
  align-items:center;
  font-size:1.2rem;
  font-weight:750;
  letter-spacing:-.6px;
  white-space:nowrap
}

.brand-mark {
  background:var(--ink);
  color:white;
  display:grid;
  place-items:center;
  border-radius:7px;
  width:29px;
  height:29px;
  font-size:24px;
  font-weight:400;
  margin-right:10px
}

.brand-dot {
  color:var(--blue)
}

nav {
  display:flex;
  gap:25px
}

nav a {
  font-size:.875rem;
  font-weight:500;
  min-height:44px;
  display:flex;
  align-items:center
}

.menu-toggle {
  display:none
}

.skip-link {
  position:fixed;
  top:0;
  transform:translateY(-200%);
  left:20px;
  z-index:20;
  background:var(--ink);
  color:white;
  padding:12px
}

.skip-link:focus {
  top:10px;
  transform:translateY(0)
}

.hero {
  display:flex;
  align-items:flex-end;
  justify-content:space-between;
  gap:24px;
  padding:53px 0 42px
}

.eyebrow {
  font-size:.75rem;
  letter-spacing:1.7px;
  font-weight:700;
  color:var(--muted);
  margin:0 0 8px
}

.hero .eyebrow {
  font-size:.75rem;
  margin-bottom:14px
}

.tiny-grid {
  font-size:16px;
  color:var(--blue);
  margin-right:5px
}

h1 {
  font-size:clamp(2.6rem,5.4vw,4.15rem);
  letter-spacing:-2.9px;
  line-height:1.05;
  margin:0 0 16px;
  font-weight:700
}

h1 span {
  color:var(--blue)
}

.tagline {
  font-size:1.3rem;
  letter-spacing:-.3px;
  margin:0 0 7px
}

.hero-note {
  color:var(--muted);
  font-size:.9375rem;
  margin:0
}

.hero-link {
  display:flex;
  align-items:center;
  gap:24px;
  min-height:44px;
  color:var(--blue);
  font-size:.875rem;
  font-weight:650;
  border-bottom:1px solid #aabce5;
  margin-bottom:4px;
  white-space:nowrap
}

.hero-link span {
  font-size:21px
}

.tool {
  padding:29px;
  background:#fff;
  border:1px solid var(--line);
  border-radius:var(--radius);
  min-width:0;
  scroll-margin-top:18px
}

.featured {
  padding:30px 32px 0;
  border-top:3px solid #243c60
}

.tool-heading {
  display:flex;
  justify-content:space-between;
  gap:20px;
  align-items:center
}

.heading-group {
  display:flex;
  gap:14px;
  align-items:center
}

.heading-group .eyebrow {
  margin-bottom:4px
}

.tool-icon {
  display:flex;
  align-items:center;
  justify-content:center;
  width:46px;
  height:46px;
  border:1px solid #e0e7f0;
  background:#f4f7fc;
  color:#304f81;
  flex-shrink:0;
  border-radius:11px;
  font-size:23px;
  font-weight:500
}

.tool-icon svg,.privacy-lock svg {
  width:24px;
  height:24px;
  fill:none;
  stroke:currentColor;
  stroke-width:1.5;
  stroke-linecap:round;
  stroke-linejoin:round
}

.bitcoin-icon {
  color:var(--orange);
  background:#fff5e8;
  border-color:#f4dfc2;
  font-size:29px
}

h2 {
  font-size:1.3rem;
  line-height:1.3;
  letter-spacing:-.5px;
  margin:0;
  font-weight:650
}

.featured h2 {
  font-size:1.5rem
}

.tool-description {
  color:var(--muted);
  font-size:.9375rem;
  margin:17px 0 23px
}

.currency-label {
  display:flex;
  align-items:center;
  gap:12px;
  color:var(--muted);
  font-size:.8125rem
}

.currency-label select {
  width:118px;
  min-height:44px;
  background:#fff
}

.tabs {
  display:flex;
  gap:5px;
  border-bottom:1px solid var(--line);
  padding-bottom:12px;
  flex-wrap:wrap
}

.tabs button {
  background:transparent;
  border:1px solid transparent;
  white-space:nowrap;
  color:var(--muted);
  padding:10px 15px;
  font-size:.875rem
}

.tabs button[aria-selected=true] {
  background:var(--soft);
  color:#234fae;
  border-color:#d8e3f8
}

.tabs button:hover {
  background:var(--page);
  color:var(--ink)
}

.btc-layout {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:38px;
  padding:28px 0
}

.field-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:19px 16px
}

.field {
  min-width:0
}

.field.full {
  grid-column:1/-1
}

label {
  display:block;
  font-size:.875rem;
  font-weight:550;
  margin-bottom:8px
}

input,select,textarea {
  width:100%;
  border:1px solid #cbd5e1;
  border-radius:8px;
  background:#fff;
  color:var(--ink);
  min-height:48px;
  padding:11px 13px;
  min-width:0
}

input {
  font-variant-numeric:tabular-nums
}

input[aria-invalid=true] {
  border-color:#b62d2d
}

input[type=number] {
  appearance:textfield;
  -moz-appearance:textfield
}

input::-webkit-inner-spin-button {
  appearance:none
}

input[type=date] {
  font-size:.9375rem;
  max-width:100%
}

.input-wrap {
  display:flex;
  position:relative
}

.input-wrap .unit {
  position:absolute;
  inset-block:0;
  left:14px;
  display:flex;
  align-items:center;
  color:var(--muted);
  font-size:.9375rem;
  pointer-events:none
}

.input-wrap.has-unit input {
  padding-left:35px
}

.input-wrap .suffix {
  left:auto;
  right:14px;
  font-size:.8125rem
}

.input-wrap.has-suffix input {
  padding-right:64px
}

.field-hint,.small {
  font-size:.8125rem;
  color:var(--muted);
  line-height:1.65
}

.field-hint {
  margin:7px 0 0
}

.form-actions {
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  margin-top:18px
}

.reset {
  border-color:transparent;
  background:transparent;
  color:var(--muted);
  padding-inline:0
}

.reset:hover {
  border-color:transparent;
  background:transparent;
  color:var(--blue)
}

.reset:before {
  content:'↺';
  margin-right:7px
}

.live-button {
  font-weight:550
}

.live-button:before {
  content:'↻';
  font-size:18px;
  margin-right:7px
}

.live-status {
  margin:10px 0 0;
  font-size:.8125rem;
  color:var(--muted);
  min-height:22px
}

.result {
  border:1px solid #dde6f5;
  background:#f1f5fc;
  border-radius:11px;
  padding:24px;
  overflow-wrap:anywhere;
  align-self:stretch;
  display:flex;
  flex-direction:column;
  justify-content:center;
  min-height:134px
}

.result-label {
  font-size:.8125rem;
  color:#496184;
  font-weight:550;
  margin:0 0 8px
}

.result-value {
  font-size:clamp(1.8rem,3.6vw,2.7rem);
  letter-spacing:-1.5px;
  font-weight:650;
  line-height:1.2;
  font-variant-numeric:tabular-nums;
  margin:0 0 8px
}

.result-caption {
  font-size:.8125rem;
  color:var(--muted);
  margin:0
}

.result dl {
  margin:16px 0 0
}

.result dl div {
  display:flex;
  justify-content:space-between;
  gap:15px;
  padding:8px 0;
  border-top:1px solid #dae3f1;
  font-size:.875rem
}

.result dt {
  color:#496184
}

.result dd {
  font-variant-numeric:tabular-nums;
  font-weight:600;
  margin:0;
  text-align:right
}

.result.is-error {
  background:#fff5f4;
  border-color:#f0d2ce;
  color:#992620
}

.result.is-error .result-label {
  color:#992620
}

.result.is-error p:last-child {
  margin:0;
  font-size:.9375rem
}

.bitcoin-foot {
  display:flex;
  gap:16px;
  justify-content:space-between;
  margin-top:0;
  padding:15px 0;
  border-top:1px solid var(--line);
  font-size:.75rem;
  color:var(--muted)
}

.bitcoin-foot span:first-child {
  white-space:nowrap;
  font-family:ui-monospace,Consolas,monospace
}

.section-heading {
  display:flex;
  align-items:center;
  justify-content:space-between;
  margin:43px 0 20px
}

.section-heading h2 {
  font-size:1.35rem
}

.section-heading span {
  font-size:.75rem;
  letter-spacing:1.3px;
  color:var(--muted);
  font-weight:600
}

.tools-grid {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:24px
}

.calculator>.mode-label {
  font-size:.8125rem;
  color:var(--muted)
}

.mode-select {
  margin-bottom:20px;
  font-size:.9375rem;
  background:#f9fbfd
}

.calculator .result {
  margin-top:19px;
  padding:20px 22px;
  min-height:127px
}

.calculator .result-value {
  font-size:2rem
}

.calculator .form-actions {
  margin-top:5px;
  justify-content:flex-end
}

.calculator .help {
  font-size:.8125rem;
  color:var(--muted);
  margin:12px 0 0;
  line-height:1.65
}

.text-tool {
  grid-column:1/-1
}

.privacy-badge {
  font-size:.8125rem;
  color:var(--muted)
}

.privacy-badge span {
  font-size:19px;
  margin-right:5px
}

.text-layout>div {
  min-width:0
}

.text-layout {
  display:grid;
  grid-template-columns:1fr 260px;
  gap:28px
}

textarea {
  display:block;
  resize:vertical;
  min-height:226px;
  font-size:.9375rem;
  line-height:1.65
}

textarea::placeholder {
  color:#6c7788
}

.text-actions {
  display:flex;
  flex-wrap:wrap;
  gap:8px;
  margin-top:12px
}

.text-actions button {
  font-size:.75rem;
  padding:8px 12px;
  min-height:44px;
  font-weight:500
}

.text-summary {
  background:var(--page);
  border:1px solid #e4e9f0;
  border-radius:10px;
  padding:20px
}

.stats {
  display:grid;
  grid-template-columns:1fr 1fr;
  gap:21px 14px
}

.stat strong {
  display:block;
  font-size:1.75rem;
  letter-spacing:-.8px;
  font-weight:650;
  overflow-wrap:anywhere;
  line-height:1.25;
  font-variant-numeric:tabular-nums
}

.stat span {
  overflow-wrap:anywhere;
  display:block;
  font-size:.75rem;
  color:var(--muted);
  margin-top:4px
}

.text-summary .small {
  border-top:1px solid var(--line);
  margin:19px 0 0;
  padding-top:15px;
  font-size:.75rem
}

.text-bottom {
  border-top:1px solid var(--line);
  margin-top:22px;
  padding-top:18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:20px
}

.text-bottom>span {
  color:var(--muted);
  font-size:.8125rem
}

.text-bottom>div {
  display:flex;
  gap:24px;
  flex-shrink:0
}

.primary {
  background:var(--blue);
  border-color:var(--blue);
  color:white
}

.primary:hover {
  background:#214dad;
  color:white;
  border-color:#214dad
}

.primary span {
  margin-left:15px
}

.privacy-note {
  display:flex;
  gap:20px;
  padding:38px 24px 37px;
  max-width:870px;
  margin:15px auto 0;
  scroll-margin-top:24px
}

.privacy-note h2 {
  font-size:1rem
}

.privacy-note p {
  margin:7px 0 0;
  font-size:.875rem;
  color:var(--muted)
}

.privacy-note p.small {
  font-size:.75rem
}

.privacy-lock {
  color:#5c7599;
  margin-top:2px
}

footer {
  display:flex;
  justify-content:space-between;
  gap:20px;
  align-items:center;
  padding:27px 0 30px;
  border-top:1px solid var(--line)
}

footer>div {
  display:flex;
  gap:18px;
  align-items:center
}

footer strong {
  font-size:.875rem
}

footer span,footer nav a {
  font-size:.75rem;
  color:var(--muted)
}

.notice {
  padding:20px;
  border:1px solid #bb6521;
  background:#fff4e6;
  border-radius:8px
}

@media(min-width:1100px) {
  .featured .field-grid {
    grid-template-columns:1fr 1fr
  }

  .featured .field-grid .field:last-child:nth-child(odd) {
    grid-column:1/-1
  }

}

@media(max-width:980px) {
  .wrap {
    width:calc(100% - 40px)
  }

  nav {
    gap:16px
  }

  .header-inner {
    gap:12px
  }

  .btc-layout {
    gap:24px
  }

  .tool {
    padding:24px
  }

  .featured {
    padding:25px 25px 0
  }

  .text-layout {
    grid-template-columns:1fr 230px;
    gap:20px
  }

  .heading-group {
    gap:10px
  }

  h2 {
    font-size:1.15rem
  }

  .field-grid {
    gap:16px 12px
  }

  .currency-label {
    gap:8px
  }

  .bitcoin-foot {
    flex-direction:column;
    gap:5px
  }

}

@media(max-width:760px) {
  .header-inner {
    flex-wrap:wrap;
    min-height:68px;
    padding-block:10px
  }

  .menu-toggle {
    display:block
  }

  .site-header nav {
    display:none;
    width:100%;
    flex-wrap:wrap;
    gap:2px 19px;
    padding:5px 0
  }

  .site-header nav.is-open {
    display:flex
  }

  .hero {
    padding:35px 0 30px;
    align-items:flex-start;
    flex-direction:column;
    gap:20px
  }

  .hero-link {
    gap:25px
  }

  .tagline {
    font-size:1.13rem
  }

  .hero-note {
    font-size:.875rem
  }

  .hero .eyebrow {
    font-size:.75rem
  }

  .tools-grid {
    grid-template-columns:1fr
  }

  .btc-layout {
    grid-template-columns:1fr;
    gap:18px;
    padding:23px 0
  }

  .featured .result {
    min-height:168px
  }

  .result-value {
    font-size:2.5rem
  }

  .featured .tool-heading {
    align-items:flex-start
  }

  .currency-label {
    display:block;
    margin:0;
    font-size:.75rem
  }

  .currency-label select {
    display:block;
    width:108px;
    margin-top:5px
  }

  .featured h2 {
    font-size:1.25rem
  }

  .tool-description {
    margin:16px 0 20px
  }

  .tabs {
    gap:4px
  }

  .tabs button {
    padding:8px 10px;
    font-size:.8125rem
  }

  .section-heading {
    margin-top:31px
  }

  .section-heading span {
    display:none
  }

  .text-layout {
    grid-template-columns:1fr
  }

  .text-summary {
    padding:18px
  }

  .stats {
    grid-template-columns:repeat(auto-fit,minmax(4rem,1fr))
  }

  .text-summary .small br {
    display:none
  }

  .privacy-badge {
    display:none
  }

  .privacy-note {
    padding:30px 4px;
    gap:14px
  }

  .text-bottom {
    gap:12px;
    align-items:flex-start
  }

  .text-bottom>span {
    max-width:45%
  }

  footer {
    align-items:flex-start;
    flex-direction:column;
    gap:12px
  }

  footer>div {
    flex-wrap:wrap;
    gap:8px 14px
  }

  .tool-icon {
    width:42px;
    height:42px
  }

  .text-bottom>div {
    gap:16px
  }

  html {
    scroll-padding-top:85px
  }

}

@media(max-width:400px) {
  .wrap {
    width:calc(100% - 28px)
  }

  .tool {
    padding:20px
  }

  .featured {
    padding:22px 20px 0
  }

  .featured .tool-heading {
    flex-wrap:wrap;
    gap:15px
  }

  .currency-label {
    display:flex;
    align-items:center;
    gap:12px
  }

  .currency-label select {
    margin:0
  }

  .field-grid {
    grid-template-columns:1fr
  }

  .result-value {
    font-size:2rem
  }

  .text-bottom {
    flex-direction:column
  }

  .text-bottom>span {
    max-width:none
  }

  .text-bottom>div {
    width:100%;
    justify-content:space-between
  }

  .stats {
    gap:20px 10px
  }

  .stat span {
    font-size:.75rem
  }

}

@media(prefers-reduced-motion:reduce) {
  html {
    scroll-behavior:auto
  }

}