@import url("https://fonts.googleapis.com/css2?family=Fraunces:opsz,wght@9..144,500;9..144,700&family=IBM+Plex+Mono:wght@400;500&display=swap");

:root {
  color-scheme: light;
  --ink: #0c1210;
  --muted: #47514a;
  --paper: #f5f1e8;
  --accent: #f56f5f;
  --accent-2: #315c48;
  --panel: rgba(255, 255, 255, 0.78);
  --border: rgba(12, 18, 16, 0.12);
  --shadow: 0 25px 50px rgba(12, 18, 16, 0.12);
  --radius: 20px;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  font-family: "IBM Plex Mono", monospace;
  background: radial-gradient(circle at top left, #ffd4b6 0%, transparent 52%),
    radial-gradient(circle at 90% 10%, #cde6d7 0%, transparent 48%),
    var(--paper);
  color: var(--ink);
  min-height: 100vh;
}

.grain {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='140' height='140' viewBox='0 0 140 140'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='140' height='140' filter='url(%23n)' opacity='0.12'/%3E%3C/svg%3E");
  mix-blend-mode: multiply;
}

.page {
  max-width: 1200px;
  margin: 0 auto;
  padding: 72px 24px 96px;
  display: flex;
  flex-direction: column;
  gap: 36px;
  position: relative;
}

.hero {
  display: grid;
  grid-template-columns: minmax(0, 1.3fr) minmax(0, 0.7fr);
  gap: 32px;
  align-items: center;
}

.eyebrow {
  text-transform: uppercase;
  font-size: 12px;
  letter-spacing: 0.3em;
  color: var(--accent-2);
  font-weight: 500;
  margin: 0 0 16px;
}

.hero h1 {
  font-family: "Fraunces", serif;
  font-size: clamp(2.6rem, 4vw, 3.6rem);
  line-height: 1.05;
  margin: 0 0 16px;
}

.lede {
  font-size: 1.05rem;
  color: var(--muted);
  max-width: 520px;
}

.hero-card {
  background: var(--panel);
  backdrop-filter: blur(10px);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
  display: grid;
  gap: 18px;
}

.hero-stat {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.hero-stat .label {
  font-size: 12px;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--muted);
}

.hero-stat .value {
  font-family: "Fraunces", serif;
  font-size: 1.7rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 24px;
}

.panel {
  background: var(--panel);
  border-radius: var(--radius);
  border: 1px solid var(--border);
  padding: 24px;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel.wide {
  grid-column: span 2;
}

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

.panel-subsection {
  margin-top: 18px;
  padding-top: 18px;
  border-top: 1px dashed var(--border);
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.panel-subsection h3 {
  margin: 0;
  font-size: 1.1rem;
}

.panel-sub {
  color: var(--muted);
  margin: 0;
}

.form {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
  gap: 14px;
}

.form.inline {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

label {
  display: flex;
  flex-direction: column;
  gap: 8px;
  font-size: 0.85rem;
  color: var(--muted);
}

input,
select {
  font-family: "IBM Plex Mono", monospace;
  padding: 10px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  font-size: 0.95rem;
}

input:focus,
select:focus {
  outline: 2px solid rgba(245, 111, 95, 0.35);
  border-color: var(--accent);
}

button {
  font-family: "IBM Plex Mono", monospace;
  border-radius: 999px;
  padding: 10px 16px;
  border: none;
  background: var(--accent-2);
  color: #fefcf8;
  cursor: pointer;
}

button.ghost {
  background: transparent;
  color: var(--accent-2);
  border: 1px solid var(--border);
}

.table {
  display: grid;
  gap: 10px;
}

.table-row {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 12px;
  align-items: center;
}

.table-row span {
  font-size: 0.8rem;
  color: var(--muted);
}

.table-row .table-value {
  font-size: 0.95rem;
  color: var(--ink);
}

.table-header span {
  text-transform: uppercase;
  letter-spacing: 0.16em;
  font-size: 0.7rem;
}

.remove-row {
  background: transparent;
  color: var(--accent);
  border: 1px solid rgba(245, 111, 95, 0.5);
}

.note {
  font-size: 0.8rem;
  color: var(--muted);
}

.error {
  color: #b32926;
  font-size: 0.85rem;
}

.result {
  border-radius: 16px;
  border: 1px dashed var(--border);
  padding: 16px;
  background: rgba(255, 255, 255, 0.65);
}

.mini-chart {
  border-radius: 16px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  padding: 14px;
  display: grid;
  grid-template-columns: auto 1fr;
  grid-template-rows: auto auto;
  grid-template-areas:
    "y chart"
    ". legend";
  gap: 10px 14px;
}

.chart-area {
  position: relative;
  grid-area: chart;
}

.mini-chart svg {
  width: 100%;
  height: 160px;
}

#chart-a,
#chart-b {
  fill: none;
  stroke-width: 2.5;
}

#chart-a {
  stroke: var(--accent);
}

#chart-b {
  stroke: var(--accent-2);
}

#chart-cross {
  stroke: rgba(12, 18, 16, 0.4);
  stroke-dasharray: 4 6;
}

#chart-hover {
  stroke: rgba(12, 18, 16, 0.65);
  stroke-dasharray: 2 4;
  opacity: 0;
}

.chart-tooltip {
  position: absolute;
  top: 18px;
  left: 18px;
  padding: 8px 10px;
  border-radius: 12px;
  background: rgba(12, 18, 16, 0.88);
  color: #fefcf8;
  font-size: 0.7rem;
  line-height: 1.35;
  white-space: pre-line;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.15s ease;
}

.chart-legend {
  grid-area: legend;
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.75rem;
  color: var(--muted);
  flex-wrap: wrap;
}

.chart-legend .dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  display: inline-block;
}

.chart-legend .dot.a {
  background: var(--accent);
}

.chart-legend .dot.b {
  background: var(--accent-2);
}

.axis-label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.18em;
  color: var(--muted);
  pointer-events: none;
}

.axis-label-x {
  position: absolute;
  right: 16px;
  bottom: -6px;
}

.axis-label-y {
  grid-area: y;
  writing-mode: vertical-rl;
  transform: rotate(180deg);
  align-self: center;
  justify-self: center;
}

.result-title {
  text-transform: uppercase;
  letter-spacing: 0.2em;
  font-size: 0.7rem;
  margin: 0 0 8px;
  color: var(--muted);
}

.result-value {
  font-family: "Fraunces", serif;
  font-size: 1.4rem;
  margin: 0 0 6px;
}

.result-sub {
  margin: 0;
  color: var(--muted);
}

.result-table {
  display: grid;
  gap: 10px;
}

.result-row {
  display: grid;
  grid-template-columns: 1fr 1fr 1.4fr;
  gap: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
}

.result-row.best {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(245, 111, 95, 0.2);
}

.result-row span {
  font-size: 0.85rem;
}

.donation-cta {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  padding: 18px 20px;
  border-radius: 999px;
  border: 1px solid var(--border);
  background: rgba(255, 255, 255, 0.7);
  box-shadow: var(--shadow);
  font-size: 0.95rem;
  color: var(--muted);
  flex-wrap: wrap;
}

.donation-cta p {
  margin: 0;
}

.donation-button {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: 999px;
  background: var(--accent-2);
  color: #fefcf8;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.9rem;
}

.donation-button:hover {
  filter: brightness(1.05);
}

.emoji {
  font-family: "Apple Color Emoji", "Segoe UI Emoji", "Noto Color Emoji", sans-serif;
  font-size: 1rem;
  line-height: 1;
}

@media (max-width: 900px) {
  .hero {
    grid-template-columns: 1fr;
  }

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

  .panel.wide {
    grid-column: auto;
  }

  .panel-header {
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 600px) {
  .page {
    padding: 48px 18px 72px;
  }

  .table-row {
    grid-template-columns: 1fr;
  }

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

  .result-row {
    grid-template-columns: 1fr;
  }
}