:root {
  color-scheme: light dark;
  --bg: #f4f7f5;
  --surface: #ffffff;
  --surface-2: #f1f5f2;
  --ink: #0b1a14;
  --muted: #5e7268;
  --border: #dde7e1;
  --brand: #0f9d6b;
  --brand-strong: #0b7a53;
  --brand-soft: #e3f5ec;
  --accent: #f5b301;
  --danger: #e5484d;
  --shadow-sm: 0 1px 2px rgba(9, 40, 28, 0.06);
  --shadow: 0 24px 60px -28px rgba(9, 50, 34, 0.28);
  --radius: 22px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg: #070d0b;
    --surface: #0f1915;
    --surface-2: #14231c;
    --ink: #e9f3ee;
    --muted: #9ab0a5;
    --border: #22362d;
    --brand: #34d399;
    --brand-strong: #10b981;
    --brand-soft: #103026;
    --accent: #f5b301;
    --danger: #ff6b6f;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow: 0 24px 60px -28px rgba(0, 0, 0, 0.7);
  }
}

* {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  color: var(--ink);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  background:
    radial-gradient(55rem 36rem at 85% -12%, color-mix(in srgb, var(--brand) 14%, transparent), transparent 62%),
    radial-gradient(45rem 30rem at -8% 4%, color-mix(in srgb, var(--accent) 10%, transparent), transparent 58%),
    var(--bg);
  background-attachment: fixed;
}

.page-glow {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background: radial-gradient(40rem 24rem at 50% -20%, color-mix(in srgb, var(--brand) 10%, transparent), transparent 70%);
  z-index: 0;
}

.wrap {
  width: 100%;
  max-width: 1020px;
  margin: 0 auto;
  padding: 0 20px;
  position: relative;
  z-index: 1;
}

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 82%, transparent);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid color-mix(in srgb, var(--border) 70%, transparent);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  height: 66px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--ink);
}

.brand-mark {
  display: grid;
  place-items: center;
  width: 34px;
  height: 34px;
  border-radius: 10px;
  background: linear-gradient(140deg, var(--brand), var(--brand-strong));
  color: #fff;
  font-size: 0.86rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  box-shadow: 0 6px 16px -6px color-mix(in srgb, var(--brand) 70%, transparent);
}

.brand-name {
  font-size: 1.16rem;
  font-weight: 850;
  letter-spacing: -0.03em;
}

.brand-name span {
  color: var(--brand);
}

.nav {
  display: flex;
  align-items: center;
  gap: 22px;
}

.nav a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
  transition: color 0.18s ease;
}

.nav a:hover {
  color: var(--brand);
}

.hero {
  padding: 62px 0 30px;
  text-align: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  margin-bottom: 20px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: color-mix(in srgb, var(--surface) 70%, transparent);
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.02em;
}

.live-dot {
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--brand);
  box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 20%, transparent);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { box-shadow: 0 0 0 4px color-mix(in srgb, var(--brand) 16%, transparent); }
  50% { box-shadow: 0 0 0 7px color-mix(in srgb, var(--brand) 6%, transparent); }
}

.hero h1 {
  margin: 0;
  font-size: clamp(2.5rem, 7.4vw, 4.4rem);
  line-height: 0.98;
  letter-spacing: -0.05em;
  font-weight: 850;
}

.hero h1 .grad {
  background: linear-gradient(100deg, var(--brand), color-mix(in srgb, var(--brand) 55%, #38bdf8));
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.hero-sub {
  max-width: 560px;
  margin: 20px auto 0;
  color: var(--muted);
  font-size: 1.02rem;
}

.rates {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin: 26px 0 12px;
}

.rate-card {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 6px;
  padding: 18px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 18px;
  box-shadow: var(--shadow-sm);
  transition: transform 0.18s ease, box-shadow 0.18s ease, border-color 0.18s ease;
  overflow: hidden;
}

.rate-card::before {
  content: "";
  position: absolute;
  inset: 0 auto auto 0;
  width: 100%;
  height: 3px;
  background: color-mix(in srgb, var(--brand) 45%, transparent);
  opacity: 0;
  transition: opacity 0.18s ease;
}

.rate-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow);
  border-color: color-mix(in srgb, var(--brand) 35%, var(--border));
}

.rate-card:hover::before {
  opacity: 1;
}

.rate-card.is-featured {
  border-color: color-mix(in srgb, var(--brand) 55%, var(--border));
  background: linear-gradient(180deg, color-mix(in srgb, var(--brand) 9%, var(--surface)), var(--surface));
}

.rate-card.is-featured::before {
  opacity: 1;
  background: var(--brand);
}

.rate-label {
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--muted);
}

.rate-value {
  font-size: clamp(1.4rem, 2.6vw, 1.8rem);
  font-weight: 850;
  letter-spacing: -0.035em;
  font-variant-numeric: tabular-nums;
  line-height: 1.15;
}

.rate-unit {
  font-size: 0.76rem;
  color: var(--muted);
}

.status {
  display: flex;
  align-items: center;
  gap: 9px;
  margin: 6px 0 30px;
  color: var(--muted);
  font-size: 0.84rem;
}

.status .dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  flex: 0 0 auto;
}

.status.is-ok .dot { background: var(--brand); }
.status.is-warn .dot { background: var(--accent); }
.status.is-error .dot { background: var(--danger); }

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: clamp(20px, 3vw, 32px);
  margin-bottom: 20px;
  box-shadow: var(--shadow);
  scroll-margin-top: 86px;
  position: relative;
  z-index: 1;
}

.card-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 18px;
}

.card h2 {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: -0.025em;
  font-weight: 800;
}

.pill {
  padding: 4px 11px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-strong);
  font-size: 0.72rem;
  font-weight: 750;
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

@media (prefers-color-scheme: dark) {
  .pill { color: var(--brand); }
}

.conv-form {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.field label {
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--muted);
  letter-spacing: 0.01em;
}

input,
select,
button {
  font: inherit;
  color: var(--ink);
}

input,
select {
  width: 100%;
  padding: 12px 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: var(--surface-2);
  outline: none;
  transition: border-color 0.15s ease, box-shadow 0.15s ease, background 0.15s ease;
}

input:hover,
select:hover {
  border-color: color-mix(in srgb, var(--brand) 30%, var(--border));
}

input:focus,
select:focus {
  border-color: var(--brand);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--brand) 20%, transparent);
  background: var(--surface);
}

.result-panel {
  margin-top: 20px;
  padding: 20px 22px;
  border-radius: 16px;
  background: linear-gradient(135deg, color-mix(in srgb, var(--brand) 13%, var(--surface)), color-mix(in srgb, var(--brand) 4%, var(--surface)));
  border: 1px solid color-mix(in srgb, var(--brand) 32%, var(--border));
}

.result-label {
  display: block;
  font-size: 0.72rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--muted);
  margin-bottom: 4px;
}

.result {
  font-size: clamp(1.8rem, 5.2vw, 2.9rem);
  font-weight: 850;
  letter-spacing: -0.04em;
  line-height: 1.1;
  font-variant-numeric: tabular-nums;
  word-break: break-word;
}

.equivalents {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: 10px;
  margin-top: 14px;
}

.eq {
  display: flex;
  flex-direction: column;
  gap: 3px;
  padding: 12px 14px;
  background: var(--surface-2);
  border: 1px solid transparent;
  border-radius: 12px;
}

.eq span {
  font-size: 0.7rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.eq strong {
  font-size: 1.04rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.item-form {
  display: grid;
  grid-template-columns: 1.6fr 1fr auto;
  gap: 10px;
  margin-top: 14px;
}

.btn-primary,
.btn-secondary {
  cursor: pointer;
  border-radius: 12px;
  font-weight: 750;
  transition: transform 0.12s ease, background 0.15s ease, box-shadow 0.15s ease;
}

.btn-primary {
  padding: 12px 22px;
  border: none;
  background: linear-gradient(160deg, var(--brand), var(--brand-strong));
  color: #fff;
  box-shadow: 0 10px 22px -12px color-mix(in srgb, var(--brand) 90%, transparent);
}

.btn-primary:hover {
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

@media (prefers-color-scheme: dark) {
  .btn-primary { color: #04150f; }
}

.btn-secondary {
  padding: 11px 18px;
  border: 1px solid color-mix(in srgb, var(--brand) 40%, var(--border));
  background: var(--surface);
  color: var(--brand-strong);
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  .btn-secondary { color: var(--brand); }
}

.btn-secondary:hover {
  background: var(--brand-soft);
}

.item-list {
  list-style: none;
  padding: 0;
  margin: 20px 0 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.item-list li {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  padding: 12px 15px;
  background: var(--surface-2);
  border-radius: 12px;
  font-size: 0.95rem;
  animation: fadeIn 0.18s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(-3px); }
  to { opacity: 1; transform: translateY(0); }
}

.item-list .item-name {
  font-weight: 650;
}

.item-list .item-price {
  font-variant-numeric: tabular-nums;
  color: var(--muted);
  white-space: nowrap;
}

.remove {
  border: none;
  background: transparent;
  color: var(--muted);
  cursor: pointer;
  font-size: 1.15rem;
  line-height: 1;
  padding: 3px 7px;
  border-radius: 7px;
  transition: color 0.15s ease, background 0.15s ease;
}

.remove:hover {
  color: var(--danger);
  background: color-mix(in srgb, var(--danger) 12%, transparent);
}

.totals {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 10px;
  margin-top: 20px;
}

.total {
  padding: 13px 15px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--surface-2);
}

.total span {
  display: block;
  margin-bottom: 3px;
  font-size: 0.7rem;
  font-weight: 750;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--muted);
}

.total strong {
  font-size: 1.14rem;
  font-variant-numeric: tabular-nums;
  letter-spacing: -0.02em;
}

.total.grand {
  background: linear-gradient(160deg, color-mix(in srgb, var(--brand) 16%, var(--surface)), color-mix(in srgb, var(--brand) 5%, var(--surface)));
  border-color: color-mix(in srgb, var(--brand) 42%, var(--border));
}

.link-btn {
  border: none;
  background: none;
  color: var(--brand-strong);
  font-weight: 700;
  font-size: 0.84rem;
  padding: 4px 0;
  cursor: pointer;
  text-decoration: underline;
  text-underline-offset: 3px;
}

@media (prefers-color-scheme: dark) {
  .link-btn { color: var(--brand); }
}

.link-btn[hidden] {
  display: none;
}

.donate-card {
  display: flex;
  gap: 18px;
  align-items: flex-start;
  padding: clamp(20px, 3vw, 30px);
  margin-bottom: 20px;
  border-radius: var(--radius);
  border: 1px solid color-mix(in srgb, var(--brand) 30%, var(--border));
  background: linear-gradient(140deg, color-mix(in srgb, var(--brand) 10%, var(--surface)), var(--surface) 55%);
  box-shadow: var(--shadow);
  scroll-margin-top: 86px;
}

.donate-icon {
  flex: 0 0 auto;
  display: grid;
  place-items: center;
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background: var(--brand-soft);
  color: var(--brand-strong);
}

@media (prefers-color-scheme: dark) {
  .donate-icon { color: var(--brand); }
}

.donate-icon svg {
  width: 24px;
  height: 24px;
}

.donate-body h2 {
  margin: 0 0 6px;
  font-size: 1.22rem;
  letter-spacing: -0.02em;
}

.donate-body p {
  margin: 0 0 14px;
  color: var(--muted);
}

.donate-row {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 10px;
}

.donate-row code {
  padding: 10px 14px;
  border-radius: 12px;
  background: var(--surface-2);
  border: 1px solid var(--border);
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, monospace;
  font-size: 0.92rem;
  font-weight: 600;
  word-break: break-all;
}

.features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 12px;
  margin-bottom: 20px;
}

.feature {
  padding: 20px;
  border: 1px solid var(--border);
  border-radius: 18px;
  background: color-mix(in srgb, var(--surface) 78%, transparent);
  box-shadow: var(--shadow-sm);
}

.feature-icon {
  display: grid;
  place-items: center;
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
  border-radius: 12px;
  background: var(--brand-soft);
  color: var(--brand-strong);
}

@media (prefers-color-scheme: dark) {
  .feature-icon { color: var(--brand); }
}

.feature-icon svg {
  width: 20px;
  height: 20px;
}

.feature h3 {
  margin: 0 0 5px;
  font-size: 1rem;
  letter-spacing: -0.01em;
}

.feature p {
  margin: 0;
  color: var(--muted);
  font-size: 0.88rem;
}

.about p {
  color: var(--muted);
  margin: 0 0 10px;
}

.about p:last-child {
  margin-bottom: 0;
}

.muted { color: var(--muted); }
.small { font-size: 0.84rem; }
.empty { color: var(--muted); font-size: 0.9rem; }

.site-footer {
  margin-top: 30px;
  padding: 40px 0 48px;
  border-top: 1px solid var(--border);
  background: color-mix(in srgb, var(--surface) 50%, transparent);
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  align-items: flex-start;
  justify-content: space-between;
  gap: 20px;
}

.brand-small .brand-mark {
  width: 28px;
  height: 28px;
  font-size: 0.72rem;
  border-radius: 8px;
}

.brand-small .brand-name {
  font-size: 1rem;
}

.footer-inner > div p {
  margin: 10px 0 0;
  max-width: 320px;
  color: var(--muted);
}

.footer-links {
  display: flex;
  gap: 18px;
  flex-wrap: wrap;
}

.footer-links a {
  color: var(--muted);
  text-decoration: none;
  font-size: 0.9rem;
  font-weight: 600;
}

.footer-links a:hover {
  color: var(--brand);
}

.footer-copy {
  color: var(--muted);
  align-self: flex-end;
}

.install-banner {
  position: fixed;
  left: 12px;
  right: 12px;
  bottom: 12px;
  z-index: 50;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 14px;
  max-width: 560px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 16px;
  box-shadow: var(--shadow);
}

.install-banner[hidden] {
  display: none;
}

.install-text {
  display: flex;
  flex-direction: column;
  gap: 2px;
  flex: 1;
  min-width: 0;
}

.install-text strong {
  font-size: 0.92rem;
}

.install-text span {
  font-size: 0.78rem;
  color: var(--muted);
}

#install-btn {
  border: none;
  background: linear-gradient(160deg, var(--brand), var(--brand-strong));
  color: #fff;
  font-weight: 750;
  padding: 9px 16px;
  border-radius: 11px;
  cursor: pointer;
  white-space: nowrap;
}

@media (prefers-color-scheme: dark) {
  #install-btn { color: #04150f; }
}

a:focus-visible,
button:focus-visible,
input:focus-visible,
select:focus-visible {
  outline: 2px solid var(--brand);
  outline-offset: 2px;
}

@media (max-width: 860px) {
  .rates {
    grid-template-columns: repeat(2, 1fr);
  }

  .conv-form {
    grid-template-columns: repeat(2, 1fr);
  }

  .features {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .nav a:nth-child(1) {
    display: none;
  }

  .hero {
    padding-top: 42px;
  }

  .hero-sub {
    font-size: 0.96rem;
  }

  .item-form {
    grid-template-columns: 1fr auto;
  }

  .item-form input#item-name {
    grid-column: 1 / -1;
  }

  .donate-card {
    flex-direction: column;
  }

  .footer-inner {
    flex-direction: column;
  }

  .footer-copy {
    align-self: flex-start;
  }
}

@media (max-width: 430px) {
  .nav {
    gap: 14px;
  }

  .nav a {
    font-size: 0.82rem;
  }

  .brand-name {
    font-size: 1.05rem;
  }

  .card {
    border-radius: 18px;
  }

  .result-panel {
    padding: 16px 16px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.001ms !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}