:root {
  --bg: #f5f2ea;
  --bg-accent: #ece6da;
  --panel: rgba(255, 255, 255, 0.72);
  --text: #161616;
  --muted: #6a665f;
  --line: rgba(22, 22, 22, 0.12);
  --line-strong: rgba(22, 22, 22, 0.22);
  --button: #1f3a2f;
  --button-hover: #162920;
  --button-text: #f6f2ea;
  --error: #9a2d20;
  --shadow: 0 24px 80px rgba(22, 22, 22, 0.08);
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  min-height: 100vh;
  padding: 32px;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(255, 255, 255, 0.8), transparent 38%),
    linear-gradient(135deg, var(--bg) 0%, var(--bg-accent) 100%);
  font-family: "Iowan Old Style", "Palatino Linotype", "URW Palladio L", serif;
  display: grid;
  place-items: center;
}

.frame {
  width: min(100%, 1080px);
  padding: clamp(28px, 4vw, 56px);
  border: 1px solid var(--line);
  background: var(--panel);
  backdrop-filter: blur(18px);
  box-shadow: var(--shadow);
}

.eyebrow {
  margin: 0 0 24px;
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.28em;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(2.8rem, 8vw, 5.8rem);
  font-weight: 400;
  letter-spacing: -0.06em;
  line-height: 0.94;
}

h2 {
  margin: 0;
  font-size: clamp(1.6rem, 3vw, 2.35rem);
  font-weight: 400;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.summary {
  max-width: 34rem;
  margin: 24px 0 0;
  color: var(--muted);
  font-size: clamp(1.05rem, 2vw, 1.2rem);
  line-height: 1.75;
}

.divider {
  width: 72px;
  height: 1px;
  margin: 36px 0 28px;
  background: var(--line);
}

.details {
  display: grid;
  gap: 14px;
  color: var(--text);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.95rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.details span {
  color: var(--muted);
  margin-right: 12px;
}

.tool-panel {
  display: grid;
  gap: 22px;
  margin-top: 34px;
  padding-top: 30px;
  border-top: 1px solid var(--line);
}

.section-heading {
  display: grid;
  gap: 18px;
}

.section-heading__eyebrow,
.section-label {
  margin: 0 0 8px;
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.tool-panel__intro {
  margin: 0;
  max-width: 44rem;
  color: var(--muted);
  font-size: 0.98rem;
  line-height: 1.7;
}

.tool-form {
  display: grid;
  gap: 24px;
}

.tool-form__section {
  display: grid;
  gap: 18px;
  padding: 24px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.42);
}

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

.field__label {
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.field input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--line-strong);
  border-radius: 0;
  background: rgba(255, 255, 255, 0.8);
  color: var(--text);
  font: inherit;
}

.field input:focus {
  outline: 2px solid rgba(31, 58, 47, 0.16);
  outline-offset: 2px;
  border-color: rgba(31, 58, 47, 0.55);
}

.field input[type="file"] {
  padding: 12px;
}

.field__hint {
  color: var(--muted);
  font-size: 0.92rem;
  line-height: 1.6;
}

.field__meta {
  display: inline-flex;
  align-items: center;
  color: var(--text);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.capacity-header {
  display: flex;
  flex-wrap: wrap;
  gap: 18px;
  align-items: end;
  justify-content: space-between;
}

.capacity-total {
  min-width: 180px;
  padding: 14px 16px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
  text-align: right;
}

.capacity-total span {
  display: block;
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
}

.capacity-total strong {
  display: block;
  margin-top: 8px;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.05em;
}

.capacity-grid {
  display: grid;
  grid-template-columns: repeat(9, minmax(0, 1fr));
  gap: 8px;
}

.capacity-field {
  display: grid;
  gap: 6px;
  padding: 9px 10px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.capacity-field__name {
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.68rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.capacity-field input {
  width: 100%;
  min-width: 0;
  padding: 8px 10px;
  border: 1px solid var(--line-strong);
  background: rgba(255, 255, 255, 0.92);
  color: var(--text);
  font: inherit;
}

.capacity-field input:focus {
  outline: 2px solid rgba(31, 58, 47, 0.16);
  outline-offset: 2px;
  border-color: rgba(31, 58, 47, 0.55);
}

.action-row {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
  align-items: center;
}

.action-row button {
  border: 0;
  padding: 14px 22px;
  background: var(--button);
  color: var(--button-text);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  cursor: pointer;
  transition: background-color 160ms ease, transform 160ms ease;
}

.action-row button:hover {
  background: var(--button-hover);
  transform: translateY(-1px);
}

.button-secondary {
  background: transparent;
  color: var(--button);
  border: 1px solid rgba(31, 58, 47, 0.32);
}

.button-secondary:hover {
  background: rgba(31, 58, 47, 0.08);
}

.button-secondary[disabled] {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none;
}

.action-row button:focus-visible {
  outline: 2px solid rgba(31, 58, 47, 0.2);
  outline-offset: 3px;
}

.status {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.status--error {
  color: var(--error);
}

.summary-panel {
  display: grid;
  gap: 22px;
  padding-top: 6px;
}

.summary-panel[hidden] {
  display: none;
}

.stat-grid {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 14px;
}

.stat-card {
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.stat-card span {
  display: block;
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
}

.stat-card strong {
  display: block;
  margin-top: 10px;
  font-size: 2rem;
  font-weight: 400;
  letter-spacing: -0.05em;
}

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

.distribution-card {
  display: grid;
  gap: 10px;
  padding: 18px;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.7);
}

.distribution-card__title {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  align-items: baseline;
}

.distribution-card__title strong {
  font-size: 1.08rem;
  font-weight: 400;
}

.distribution-card__title span {
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.distribution-card__meta {
  color: var(--muted);
  font-size: 0.95rem;
  line-height: 1.6;
}

.distribution-card__range {
  display: grid;
  gap: 8px;
  padding-top: 6px;
  border-top: 1px solid var(--line);
}

.distribution-card__range-item {
  display: flex;
  justify-content: space-between;
  gap: 12px;
  margin: 0;
  font-size: 0.94rem;
  line-height: 1.5;
}

.distribution-card__range-item span {
  color: var(--muted);
  font-family: "Optima", "Avenir Next", "Candara", sans-serif;
  font-size: 0.74rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

.distribution-card__range-item strong {
  font-weight: 400;
  text-align: right;
}

.distribution-card--overflow {
  border-color: rgba(154, 45, 32, 0.18);
  background: rgba(255, 247, 245, 0.78);
}

@media (max-width: 640px) {
  body {
    padding: 18px;
  }

  .frame {
    padding: 24px;
  }

  .summary {
    line-height: 1.6;
  }

  .distribution-grid,
  .stat-grid {
    grid-template-columns: 1fr;
  }

  .action-row button {
    width: 100%;
  }

  .capacity-total {
    width: 100%;
    text-align: left;
  }

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

@media (max-width: 1180px) {
  .capacity-grid {
    grid-template-columns: repeat(6, minmax(0, 1fr));
  }
}

@media (max-width: 960px) {
  .capacity-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}