:root {
  --bg-0: #edf2f8;
  --bg-1: #f9fbff;
  --surface: #ffffff;
  --surface-soft: rgba(255, 255, 255, 0.84);
  --text: #111827;
  --muted: #5f7087;
  --line: #d7e2ef;
  --line-strong: #c4d2e3;
  --primary: #0f172a;
  --primary-soft: #1f2a44;
  --accent: #1d4ed8;
  --accent-2: #0ea5e9;
  --good: #059669;
  --warn: #b45309;
  --bad: #dc2626;
  --shadow: 0 16px 42px rgba(15, 23, 42, 0.08);
  --radius-xl: 24px;
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-sm: 10px;
  --chart-grid: #d9e3ef;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  padding: 0;
}

body {
  font-family: "Manrope", "Segoe UI", sans-serif;
  color: var(--text);
  background: linear-gradient(180deg, var(--bg-0), var(--bg-1));
  min-height: 100vh;
}

.page-bg {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background:
    radial-gradient(900px 500px at 4% -12%, rgba(29, 78, 216, 0.18), transparent 62%),
    radial-gradient(640px 360px at 96% 4%, rgba(14, 165, 233, 0.12), transparent 64%),
    radial-gradient(620px 340px at 90% 96%, rgba(15, 23, 42, 0.06), transparent 70%);
}

.app-shell {
  position: relative;
  max-width: 1320px;
  margin: 0 auto;
  padding: 36px 20px 28px;
}

.hero {
  margin-bottom: 22px;
}

.hero-top {
  display: grid;
  grid-template-columns: 1fr auto 1fr;
  align-items: center;
  margin-bottom: 14px;
}

.hero-spacer {
  width: 100%;
}

.brand-logo {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 7px 14px 7px 7px;
  border-radius: 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.9);
  justify-self: center;
  box-shadow: 0 8px 20px rgba(15, 23, 42, 0.12);
}

.brand-icon {
  width: 44px;
  height: 44px;
  flex: 0 0 44px;
}

.brand-copy {
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  line-height: 1.1;
}

.brand-kicker {
  font-size: 0.63rem;
  letter-spacing: 0.14em;
  font-weight: 800;
  color: #1e3a8a;
}

.brand-title {
  margin-top: 3px;
  font-size: clamp(1.05rem, 2.4vw, 1.46rem);
  font-weight: 800;
  letter-spacing: 0.01em;
  color: var(--primary);
}

.lang-switch {
  justify-self: end;
  display: inline-flex;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #ffffff;
  padding: 3px;
}

.lang-btn {
  border: 0;
  background: transparent;
  border-radius: 999px;
  color: var(--muted);
  font-size: 0.74rem;
  font-weight: 800;
  line-height: 1;
  min-width: 42px;
  padding: 7px 10px;
  cursor: pointer;
}

.lang-btn.active {
  background: linear-gradient(135deg, #1d4ed8, #0ea5e9);
  color: #f8fbff;
}

.hero-copy {
  margin: 0 auto;
  text-align: center;
  max-width: 820px;
  color: var(--primary-soft);
  font-size: 0.97rem;
  line-height: 1.55;
}

.layout {
  display: grid;
  grid-template-columns: minmax(360px, 430px) minmax(0, 1fr);
  gap: 18px;
  align-items: start;
}

.card {
  background: var(--surface-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow);
  backdrop-filter: blur(7px);
}

.input-card {
  padding: 20px;
  position: sticky;
  top: 16px;
}

.section-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 12px;
}

.section-head h2 {
  margin: 0;
  font-size: 1.02rem;
  color: var(--primary);
}

.title-with-help {
  display: inline-flex;
  align-items: center;
  gap: 7px;
}

.section-pill {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--primary-soft);
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.7);
  border-radius: 999px;
  padding: 5px 9px;
}

.form-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 12px;
}

.form-grid label {
  display: flex;
  flex-direction: column;
  gap: 6px;
  font-size: 0.81rem;
  color: var(--primary-soft);
  font-weight: 600;
}

.field-label-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.field-help-btn {
  position: relative;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--primary-soft);
  width: 18px;
  height: 18px;
  border-radius: 999px;
  font-size: 0.72rem;
  font-weight: 800;
  line-height: 1;
  cursor: help;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}

.field-help-btn::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(100% + 10px);
  min-width: 240px;
  max-width: 320px;
  background: #0f172a;
  color: #f8fafc;
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 10px;
  padding: 8px 9px;
  font-size: 0.72rem;
  line-height: 1.35;
  text-align: left;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.14s ease;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.3);
  z-index: 12;
}

.field-help-btn:hover::after,
.field-help-btn:focus-visible::after {
  opacity: 1;
}

input[type="number"] {
  width: 100%;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 11px;
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

select {
  width: 100%;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--text);
  border-radius: var(--radius-sm);
  padding: 10px 11px;
  font-size: 0.92rem;
  font-family: inherit;
  transition: border-color 0.18s ease, box-shadow 0.18s ease;
}

input[type="number"]:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.14);
  outline: none;
}

select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(29, 78, 216, 0.14);
  outline: none;
}

.scenario-preset-box {
  margin-top: 14px;
  padding: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f7fafe;
}

.scenario-preset-box label {
  display: block;
  margin-bottom: 6px;
  font-size: 0.79rem;
  font-weight: 700;
  color: var(--primary-soft);
}

.scenario-help {
  margin: 8px 0 0;
  font-size: 0.75rem;
  color: var(--muted);
  line-height: 1.4;
}

.table-head {
  margin-top: 18px;
}

.table-wrap {
  max-height: 388px;
  overflow: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: #ffffff;
}

.assets-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 520px;
}

.assets-table th,
.assets-table td {
  text-align: left;
  padding: 10px 10px;
  border-bottom: 1px solid var(--line);
}

.assets-table th {
  position: sticky;
  top: 0;
  z-index: 2;
  background: #f4f7fc;
  color: var(--primary-soft);
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.assets-table td {
  font-size: 0.86rem;
  color: var(--text);
}

.assets-table td:first-child {
  font-weight: 700;
  min-width: 148px;
}

.assets-table input[type="number"] {
  min-width: 96px;
  padding: 8px 9px;
}

.table-note {
  margin: 12px 0 14px;
  font-size: 0.78rem;
  color: var(--muted);
}

.bitcoin-note {
  margin: -8px 0 14px;
  font-size: 0.76rem;
  color: var(--primary-soft);
}

.bitcoin-note strong {
  color: var(--primary);
}

.primary-btn {
  width: 100%;
  border: 0;
  border-radius: 13px;
  background: linear-gradient(125deg, #0f172a, #1f2937 50%, #2563eb 120%);
  color: #f8fafc;
  font-family: inherit;
  font-size: 0.93rem;
  font-weight: 800;
  letter-spacing: 0.01em;
  padding: 12px 14px;
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, opacity 0.16s ease;
}

.primary-btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 8px 26px rgba(15, 23, 42, 0.28);
}

.primary-btn:active {
  transform: translateY(0);
  opacity: 0.92;
}

.results-column {
  display: grid;
  gap: 16px;
}

.summary-card {
  padding: 20px;
}

.summary {
  min-height: 72px;
}

.summary-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.summary-item {
  border: 1px solid var(--line);
  background: #ffffff;
  border-radius: var(--radius-lg);
  padding: 12px;
}

.summary-label {
  font-size: 0.76rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 700;
}

.summary-label-row {
  display: inline-flex;
  align-items: center;
  gap: 6px;
}

.summary-help-btn {
  transform: translateY(-1px);
}

.summary-value {
  font-size: clamp(1rem, 2vw, 1.24rem);
  line-height: 1.2;
  font-weight: 800;
  color: var(--primary);
}

.summary-value.good {
  color: var(--good);
}

.summary-value.warn {
  color: var(--warn);
}

.summary-value.bad {
  color: var(--bad);
}

.charts-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 14px;
}

.chart-card {
  padding: 14px 14px 12px;
}

.chart-head {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 10px;
}

.chart-card h3 {
  margin: 0 0 10px;
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--primary-soft);
  letter-spacing: 0.01em;
}

.chart-head h3 {
  margin: 0;
}

.chart-help-btn {
  position: relative;
  border: 1px solid var(--line-strong);
  background: #ffffff;
  color: var(--primary-soft);
  width: 22px;
  height: 22px;
  border-radius: 999px;
  font-size: 0.8rem;
  font-weight: 800;
  line-height: 1;
  cursor: help;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.chart-help-btn::after {
  content: attr(data-tip);
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  bottom: calc(100% + 10px);
  min-width: 220px;
  max-width: 300px;
  background: #0f172a;
  color: #f8fafc;
  border: 1px solid rgba(148, 163, 184, 0.35);
  border-radius: 10px;
  padding: 7px 8px;
  font-size: 0.72rem;
  line-height: 1.35;
  text-align: left;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.14s ease;
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.3);
  z-index: 10;
}

.chart-help-btn:hover::after,
.chart-help-btn:focus-visible::after {
  opacity: 1;
}

.chart-canvas {
  width: 100%;
  height: 290px;
  display: block;
  border-radius: 14px;
  border: 1px solid var(--line);
  background:
    linear-gradient(180deg, rgba(248, 251, 255, 0.96), rgba(255, 255, 255, 0.96));
}

.comparison-card {
  padding: 14px;
}

.comparison-table-wrap {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: auto;
  background: #ffffff;
}

.comparison-table {
  width: 100%;
  border-collapse: collapse;
  min-width: 560px;
}

.comparison-table th,
.comparison-table td {
  padding: 9px 10px;
  border-bottom: 1px solid var(--line);
  text-align: left;
  font-size: 0.81rem;
}

.comparison-table th {
  font-size: 0.74rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--primary-soft);
  background: #f4f7fc;
}

.comparison-table tr.active-scenario td {
  background: #ecf3ff;
  font-weight: 700;
}

.methodology-card {
  margin-top: 16px;
  padding: 18px;
}

.methodology-card h2 {
  margin: 0 0 8px;
  font-size: 1rem;
  color: var(--primary);
}

.methodology-card p {
  margin: 0;
  font-size: 0.85rem;
  line-height: 1.55;
  color: var(--primary-soft);
}

.methodology-list {
  margin: 10px 0 8px;
  padding-left: 18px;
}

.base-values {
  margin-top: 10px;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  background: #f7fafe;
  padding: 10px;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 8px;
}

.base-values-title {
  grid-column: 1 / -1;
  font-size: 0.78rem;
  color: var(--primary-soft);
  font-weight: 700;
  margin-bottom: 2px;
}

.base-value-item {
  border: 1px solid #d8e4f4;
  border-radius: 10px;
  background: #ffffff;
  padding: 8px;
}

.base-value-asset {
  font-size: 0.73rem;
  color: var(--muted);
  text-transform: uppercase;
  letter-spacing: 0.03em;
  margin-bottom: 4px;
}

.base-value-metrics {
  font-size: 0.8rem;
  color: var(--primary);
  font-weight: 700;
}

.base-value-robust {
  margin-top: 4px;
  font-size: 0.77rem;
  color: var(--accent);
  font-weight: 700;
}

.methodology-list li {
  margin: 6px 0;
  color: var(--primary-soft);
  font-size: 0.82rem;
  line-height: 1.45;
}

.sources-line {
  margin-top: 8px;
  font-size: 0.77rem;
  color: var(--muted);
}

.sources-line a {
  color: var(--accent);
  text-decoration: none;
}

.sources-line a:hover {
  text-decoration: underline;
}

.footer-note {
  margin-top: 14px;
  text-align: center;
  color: var(--muted);
  font-size: 0.78rem;
}

.donation-note {
  margin: 6px auto 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.76rem;
  max-width: 980px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  flex-wrap: wrap;
}

.donation-address {
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--primary-soft);
  padding: 4px 6px;
  border-radius: 8px;
  font-size: 0.72rem;
  word-break: break-all;
}

.donation-copy-btn {
  border: 1px solid var(--line);
  background: #ffffff;
  color: var(--primary-soft);
  font-size: 0.72rem;
  font-weight: 700;
  border-radius: 8px;
  padding: 4px 9px;
  cursor: pointer;
}

.donation-copy-btn:hover {
  border-color: var(--line-strong);
}

.chart-tooltip {
  position: fixed;
  display: none;
  pointer-events: none;
  z-index: 10000;
  border-radius: 10px;
  border: 1px solid var(--line-strong);
  background: #0f172a;
  color: #f8fafc;
  padding: 7px 9px;
  font-size: 0.76rem;
  line-height: 1.35;
  box-shadow: 0 8px 28px rgba(15, 23, 42, 0.36);
}

@keyframes slideFade {
  from {
    opacity: 0;
    transform: translateY(14px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.hero {
  animation: slideFade 420ms ease-out both;
}

.input-card {
  animation: slideFade 480ms ease-out 40ms both;
}

.results-column {
  animation: slideFade 520ms ease-out 80ms both;
}

@media (max-width: 1180px) {
  .layout {
    grid-template-columns: 1fr;
  }

  .input-card {
    position: static;
  }
}

@media (max-width: 860px) {
  .app-shell {
    padding: 26px 14px 24px;
  }

  .hero-top {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .hero-spacer {
    display: none;
  }

  .lang-switch {
    justify-self: center;
  }

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

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

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

  .base-values {
    grid-template-columns: 1fr;
  }

  .comparison-table {
    min-width: 500px;
  }

  .chart-canvas {
    height: 260px;
  }
}

@media (prefers-reduced-motion: reduce) {
  .hero,
  .input-card,
  .results-column {
    animation: none;
  }

  .primary-btn {
    transition: none;
  }
}