:root {
  --bg-1: #f7f5ef;
  --bg-2: #e3efe8;
  --ink: #0f2f2c;
  --muted: #4f6964;
  --panel: rgba(255, 255, 255, 0.78);
  --line: rgba(14, 57, 53, 0.12);
  --accent: #0f766e;
  --accent-2: #b45309;
  --danger: #b91c1c;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  min-height: 100vh;
  color: var(--ink);
  font-family: "IBM Plex Sans", sans-serif;
  background:
    radial-gradient(1200px circle at 10% -10%, #cde8d8 0%, transparent 45%),
    radial-gradient(900px circle at 100% 0%, #fde5bd 0%, transparent 48%),
    linear-gradient(160deg, var(--bg-1), var(--bg-2));
}

.page-shell {
  max-width: none;
  width: 100%;
  margin: 0 auto;
  padding: 0.65rem 0.65rem 0.9rem;
}

.hero {
  margin-bottom: 0.5rem;
  padding: 0.4rem 0.6rem 0.25rem;
}

.hero h1 {
  margin: 0.25rem 0;
  font-size: clamp(1.45rem, 2.6vw, 2.15rem);
  line-height: 1.1;
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.03em;
}

.hero p {
  margin: 0.2rem 0;
  color: var(--muted);
  max-width: 74ch;
  font-size: 0.92rem;
}

.eyebrow {
  margin: 0;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--accent);
  font-size: 0.8rem;
}

.layout {
  display: grid;
  gap: 0.65rem;
  grid-template-columns: minmax(295px, 340px) minmax(0, 1fr);
  grid-template-areas:
    "inputs chart"
    "inputs metrics";
}

.page-shell.inputs-collapsed .layout {
  grid-template-columns: 1fr;
  grid-template-areas:
    "chart"
    "metrics";
}

.page-shell.inputs-collapsed .inputs {
  display: none;
}

.panel {
  background: var(--panel);
  border: 1px solid var(--line);
  border-radius: 14px;
  backdrop-filter: blur(8px);
  box-shadow: 0 8px 22px rgba(10, 41, 39, 0.08);
}

.panel h2 {
  margin-top: 0;
  margin-bottom: 0.55rem;
  font-size: 1.05rem;
  font-family: "Space Grotesk", sans-serif;
  letter-spacing: -0.02em;
}

.inputs {
  grid-area: inputs;
  padding: 0.75rem;
}

.input-head {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.input-head h2 {
  margin-bottom: 0.15rem;
}

.grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.45rem;
}

label {
  display: grid;
  gap: 0.25rem;
}

label span {
  font-size: 0.74rem;
  font-weight: 600;
  color: var(--muted);
}

input[type="number"] {
  width: 100%;
  border: 1px solid rgba(14, 57, 53, 0.2);
  border-radius: 10px;
  padding: 0.42rem 0.52rem;
  font-size: 0.9rem;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.75);
}

select {
  width: 100%;
  border: 1px solid rgba(14, 57, 53, 0.2);
  border-radius: 10px;
  padding: 0.42rem 0.52rem;
  font-size: 0.9rem;
  color: var(--ink);
  background: rgba(255, 255, 255, 0.75);
}

input[type="number"]:focus {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  border-color: var(--accent);
}

select:focus {
  outline: 2px solid rgba(15, 118, 110, 0.35);
  border-color: var(--accent);
}

.validation {
  margin: 0.45rem 0 0;
  color: var(--danger);
  min-height: 1rem;
  font-weight: 600;
  font-size: 0.8rem;
}

.quick-re-box {
  margin-top: 0.3rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.42rem 0.48rem;
  background: rgba(255, 255, 255, 0.56);
}

.quick-re-box h3 {
  margin: 0 0 0.2rem;
  font-size: 0.82rem;
  font-family: "Space Grotesk", sans-serif;
  color: var(--accent);
}

.quick-re-formula {
  margin: 0 0 0.33rem;
  font-size: 0.68rem;
  color: var(--muted);
  font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", monospace;
}

.quick-re-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.35rem;
}

.quick-re-grid p {
  margin: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  padding: 0.28rem 0.4rem;
  background: rgba(255, 255, 255, 0.7);
}

.quick-re-grid span {
  display: block;
  font-size: 0.68rem;
  color: var(--muted);
}

.quick-re-grid strong {
  display: block;
  margin-top: 0.08rem;
  font-size: 0.92rem;
  font-family: "Space Grotesk", sans-serif;
}

.import-box {
  margin-top: 0.35rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.42rem 0.48rem;
  background: rgba(255, 255, 255, 0.56);
}

.import-box h3 {
  margin: 0 0 0.18rem;
  font-size: 0.82rem;
  font-family: "Space Grotesk", sans-serif;
  color: var(--accent);
}

.import-copy {
  margin: 0 0 0.35rem;
  font-size: 0.7rem;
  color: var(--muted);
}

.file-field {
  display: grid;
  gap: 0.18rem;
  margin-bottom: 0.28rem;
}

.file-field span {
  font-size: 0.68rem;
  color: var(--muted);
  font-weight: 600;
}

input[type="file"] {
  border: 1px solid rgba(14, 57, 53, 0.2);
  border-radius: 8px;
  padding: 0.3rem 0.34rem;
  font-size: 0.72rem;
  background: rgba(255, 255, 255, 0.75);
}

.import-status {
  margin: 0.1rem 0 0.3rem;
  font-size: 0.69rem;
  color: var(--muted);
}

.import-status[data-type="success"] {
  color: #0f766e;
  font-weight: 600;
}

.import-status[data-type="error"] {
  color: var(--danger);
  font-weight: 600;
}

.import-preview p {
  margin: 0 0 0.15rem;
  font-size: 0.67rem;
  color: var(--muted);
}

.import-preview table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.66rem;
}

.import-preview-scroll {
  max-height: 170px;
  overflow-y: auto;
  overflow-x: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.56);
  margin-bottom: 0.24rem;
}

.import-preview th,
.import-preview td {
  border: 1px solid var(--line);
  padding: 0.15rem 0.22rem;
  text-align: left;
}

.import-preview th {
  background: rgba(255, 255, 255, 0.76);
  position: sticky;
  top: 0;
  z-index: 1;
}

.ghost-btn {
  border: 1px solid rgba(14, 57, 53, 0.25);
  background: rgba(255, 255, 255, 0.8);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.28rem 0.52rem;
  font-size: 0.72rem;
  cursor: pointer;
}

.ghost-btn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.fab-btn {
  position: sticky;
  top: 0.45rem;
  z-index: 25;
  margin: 0 0 0.45rem 0.2rem;
}

.page-shell:not(.inputs-collapsed) .fab-btn {
  display: none;
}

.info-note {
  margin-top: 0.25rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.25rem 0.45rem;
  background: rgba(255, 255, 255, 0.56);
}

.info-note summary {
  cursor: pointer;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--muted);
}

.info-note p {
  margin: 0.35rem 0 0.2rem;
  font-size: 0.8rem;
  color: #395552;
  line-height: 1.25;
}

.info-note .formula-list {
  margin: 0.2rem 0 0.25rem 1rem;
  padding-left: 0.4rem;
  font-size: 0.8rem;
  color: #395552;
  line-height: 1.35;
}

.info-note .formula-list li {
  margin: 0.22rem 0;
}

.chart-panel {
  grid-area: chart;
  padding: 0.72rem;
}

.chart-head h2 {
  margin-bottom: 0.1rem;
}

.chart-title-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
}

#resetZoomBtn {
  border: 1px solid rgba(14, 57, 53, 0.25);
  background: rgba(255, 255, 255, 0.85);
  color: var(--ink);
  border-radius: 8px;
  padding: 0.25rem 0.55rem;
  font-weight: 600;
  font-size: 0.82rem;
  cursor: pointer;
}

#resetZoomBtn:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.chart-head p {
  margin: 0 0 0.45rem;
  color: var(--muted);
  font-size: 0.86rem;
}

.chart-head .hint {
  font-size: 0.75rem;
  margin-top: -0.2rem;
}

.chart-wrap {
  position: relative;
  height: clamp(265px, 44vh, 430px);
  max-height: 430px;
}

#ecdChart {
  width: 100%;
  height: 100%;
}

.metrics {
  grid-area: metrics;
  padding: 0.72rem;
}

.metrics h2 {
  margin-bottom: 0.45rem;
}

.metric-grid {
  display: flex;
  flex-wrap: nowrap;
  gap: 0.38rem;
  overflow-x: auto;
  padding-bottom: 0.1rem;
  scrollbar-width: thin;
}

.metric-grid article {
  flex: 0 0 148px;
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 0.46rem 0.52rem;
  background: rgba(255, 255, 255, 0.66);
}

.label {
  margin: 0;
  font-size: 0.72rem;
  font-weight: 600;
  color: var(--muted);
}

.value {
  margin: 0.12rem 0 0;
  font-family: "Space Grotesk", sans-serif;
  font-size: 1rem;
}

.insights {
  margin-top: 0.5rem;
  padding: 0.45rem 0.55rem;
  border-radius: 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
  font-size: 0.8rem;
  line-height: 1.23;
}

.insights p {
  margin: 0.14rem 0;
}

@media (max-width: 1240px) {
  .layout {
    grid-template-columns: 1fr;
    grid-template-areas:
      "inputs"
      "chart"
      "metrics";
  }

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

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

  .chart-panel {
    min-height: unset;
  }

  .chart-wrap {
    height: clamp(230px, 40vh, 360px);
  }
}