:root {
  color-scheme: light;
  --ink: #17201b;
  --muted: #5e6a63;
  --line: #d8ded7;
  --surface: #ffffff;
  --surface-soft: #f4f7f4;
  --accent: #206f5f;
  --accent-dark: #12483e;
  --warning: #9d3f25;
  --gold: #c9932d;
  --shadow: 0 18px 48px rgba(23, 32, 27, 0.12);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  margin: 0;
  color: var(--ink);
  background:
    linear-gradient(135deg, rgba(32, 111, 95, 0.12), transparent 42%),
    linear-gradient(315deg, rgba(201, 147, 45, 0.16), transparent 36%),
    #eef2ee;
  min-height: 100vh;
}

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

button {
  border: 0;
  cursor: pointer;
}

.app-header {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 40px 24px 24px;
}

.app-header h1 {
  margin: 0;
  font-size: clamp(2.4rem, 5vw, 4.8rem);
  line-height: 0.95;
  letter-spacing: 0;
}

.lede {
  margin: 12px 0 0;
  max-width: 660px;
  color: var(--muted);
  font-size: 1.06rem;
}

.eyebrow {
  margin: 0 0 8px;
  color: var(--accent-dark);
  font-size: 0.76rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.header-actions,
.form-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.primary,
.secondary {
  min-height: 42px;
  border-radius: 8px;
  padding: 0 16px;
  font-weight: 750;
}

.primary {
  background: var(--accent);
  color: #fff;
}

.primary:hover {
  background: var(--accent-dark);
}

.secondary {
  background: #e4ebe5;
  color: var(--ink);
  border: 1px solid var(--line);
}

.secondary:hover {
  background: #d8e2db;
}

.compact {
  min-height: 34px;
  padding: 0 12px;
}

.app-shell {
  display: grid;
  grid-template-columns: minmax(0, 1.35fr) minmax(320px, 0.8fr);
  gap: 18px;
  max-width: 1180px;
  margin: 0 auto;
  padding: 0 24px 40px;
}

.panel {
  background: rgba(255, 255, 255, 0.92);
  border: 1px solid var(--line);
  border-radius: 8px;
  box-shadow: var(--shadow);
  padding: 22px;
}

.input-panel {
  grid-row: span 2;
}

.panel-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 16px;
  margin-bottom: 18px;
}

.panel-heading h2 {
  margin: 0;
  font-size: 1.35rem;
  letter-spacing: 0;
}

.status-pill {
  display: inline-flex;
  align-items: center;
  min-height: 30px;
  border-radius: 999px;
  padding: 0 10px;
  color: var(--muted);
  background: var(--surface-soft);
  border: 1px solid var(--line);
  font-size: 0.82rem;
  font-weight: 750;
  white-space: nowrap;
}

.status-pill.valid {
  color: var(--accent-dark);
}

.status-pill.invalid {
  color: var(--warning);
}

.field-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 16px;
}

label {
  display: grid;
  gap: 7px;
  color: var(--muted);
  font-size: 0.88rem;
  font-weight: 750;
}

input,
select,
textarea {
  width: 100%;
  min-width: 0;
  border: 1px solid var(--line);
  border-radius: 8px;
  color: var(--ink);
  background: #fff;
  outline: 0;
}

input,
select {
  height: 42px;
  padding: 0 12px;
}

textarea {
  resize: vertical;
  padding: 12px;
  line-height: 1.45;
}

input:focus,
select:focus,
textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(32, 111, 95, 0.16);
}

.input-with-unit {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  align-items: center;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: #fff;
  overflow: hidden;
}

.input-with-unit input {
  border: 0;
  border-radius: 0;
}

.input-with-unit span {
  padding: 0 12px;
  color: var(--muted);
  font-size: 0.8rem;
  font-weight: 800;
  white-space: nowrap;
}

.field-error {
  min-height: 17px;
  color: var(--warning);
  font-size: 0.78rem;
  font-weight: 700;
}

.form-actions {
  margin-top: 20px;
  justify-content: flex-end;
}

.total-card {
  display: grid;
  gap: 6px;
  padding: 18px;
  border-radius: 8px;
  background: var(--ink);
  color: #fff;
}

.total-card span {
  color: rgba(255, 255, 255, 0.75);
  font-size: 0.86rem;
  font-weight: 800;
}

.total-card strong {
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: 0;
}

.result-list {
  margin: 18px 0 0;
  display: grid;
  gap: 10px;
}

.result-list div {
  display: flex;
  justify-content: space-between;
  gap: 18px;
  padding-bottom: 10px;
  border-bottom: 1px solid var(--line);
}

.result-list dt {
  color: var(--muted);
  font-weight: 750;
}

.result-list dd {
  margin: 0;
  text-align: right;
  font-weight: 850;
}

.note-block {
  margin-top: 20px;
}

.note-block h3 {
  margin: 0 0 8px;
  font-size: 1rem;
}

.scenario-list {
  display: grid;
  gap: 10px;
  margin: 0;
  padding: 0;
  list-style: none;
}

.scenario-item {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  gap: 8px;
  align-items: stretch;
}

.scenario-load,
.scenario-delete {
  border-radius: 8px;
  border: 1px solid var(--line);
  background: #fff;
  color: var(--ink);
  text-align: left;
  padding: 10px 12px;
}

.scenario-load strong,
.scenario-load span {
  display: block;
}

.scenario-load span {
  margin-top: 3px;
  color: var(--muted);
  font-size: 0.8rem;
}

.scenario-delete {
  color: var(--warning);
  font-weight: 800;
}

.empty-state {
  color: var(--muted);
  margin: 0;
}

@media (max-width: 900px) {
  .app-header {
    align-items: flex-start;
    flex-direction: column;
  }

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

  .input-panel {
    grid-row: auto;
  }
}

@media (max-width: 620px) {
  .app-header,
  .app-shell {
    padding-left: 14px;
    padding-right: 14px;
  }

  .field-grid,
  .scenario-item {
    grid-template-columns: 1fr;
  }

  .panel {
    padding: 16px;
  }

  .header-actions,
  .form-actions {
    width: 100%;
  }

  .primary,
  .secondary {
    flex: 1;
  }
}

@media print {
  body {
    background: #fff;
  }

  .app-header,
  .app-shell {
    display: block;
    max-width: none;
    padding: 0;
  }

  .header-actions,
  .form-actions,
  .saved-panel,
  .status-pill,
  .field-error {
    display: none !important;
  }

  .panel {
    border: 0;
    box-shadow: none;
    padding: 0 0 18px;
    break-inside: avoid;
  }

  .input-panel {
    margin-top: 18px;
  }

  input,
  select,
  textarea,
  .input-with-unit {
    border-color: #aeb8b0;
  }
}