:root {
  --ink: #17211d;
  --muted: #6d756f;
  --paper: #f4f1e9;
  --surface: rgba(255, 255, 252, 0.88);
  --surface-solid: #fffef9;
  --line: rgba(23, 33, 29, 0.13);
  --mint: #77d8bc;
  --mint-dark: #16775f;
  --coral: #ff806c;
  --coral-soft: #ffe2db;
  --blue: #4c79ff;
  --shadow: 0 22px 60px rgba(42, 57, 49, 0.09);
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 12px;
  font-family: Inter, ui-sans-serif, -apple-system, BlinkMacSystemFont, "Segoe UI",
    "Hiragino Kaku Gothic ProN", "Yu Gothic", sans-serif;
  color: var(--ink);
  background: var(--paper);
  font-synthesis: none;
}

* {
  box-sizing: border-box;
}

html {
  min-width: 320px;
  scroll-behavior: smooth;
}

body {
  min-height: 100vh;
  margin: 0;
  overflow-x: hidden;
  background:
    linear-gradient(rgba(23, 33, 29, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(23, 33, 29, 0.025) 1px, transparent 1px),
    var(--paper);
  background-size: 32px 32px;
}

button,
input,
select {
  font: inherit;
}

button,
select,
input[type="range"],
input[type="file"] + * {
  cursor: pointer;
}

button:focus-visible,
input:focus-visible,
select:focus-visible,
summary:focus-visible,
.drop-zone:focus-within {
  outline: 3px solid rgba(76, 121, 255, 0.35);
  outline-offset: 2px;
}

[hidden] {
  display: none !important;
}

.ambient {
  position: fixed;
  z-index: -1;
  border-radius: 50%;
  filter: blur(2px);
  pointer-events: none;
}

.ambient-one {
  width: 520px;
  height: 520px;
  top: -260px;
  right: -150px;
  background: radial-gradient(circle, rgba(119, 216, 188, 0.24), transparent 70%);
}

.ambient-two {
  width: 460px;
  height: 460px;
  left: -250px;
  top: 46vh;
  background: radial-gradient(circle, rgba(255, 128, 108, 0.17), transparent 70%);
}

.site-header {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
  padding: 26px 0;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 12px;
  color: inherit;
  text-decoration: none;
}

.brand-mark {
  width: 43px;
  height: 43px;
  display: grid;
  place-items: center;
  border-radius: 14px 14px 14px 4px;
  color: #0b4437;
  background: var(--mint);
  box-shadow: inset 0 -2px 0 rgba(0, 0, 0, 0.08);
  font-size: 22px;
  transform: rotate(-3deg);
}

.brand strong {
  font-size: 15px;
  letter-spacing: 0.01em;
}

.privacy-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  font-weight: 650;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--mint-dark);
  box-shadow: 0 0 0 4px rgba(119, 216, 188, 0.22);
}

main {
  width: min(1180px, calc(100% - 40px));
  margin: 0 auto;
}

.hero {
  padding: 28px 0 36px;
}

.hero-copy {
  margin: 0;
  color: var(--muted);
  font-size: 16px;
  line-height: 1.8;
}

.workspace {
  display: grid;
  grid-template-columns: minmax(0, 1.58fr) minmax(300px, 0.82fr);
  gap: 26px;
  align-items: start;
}

.settings-column {
  display: grid;
  gap: 18px;
}

.panel {
  padding: 28px;
  border: 1px solid rgba(23, 33, 29, 0.1);
  border-radius: var(--radius-lg);
  background: var(--surface);
  box-shadow: 0 8px 26px rgba(42, 57, 49, 0.035);
  backdrop-filter: blur(18px);
}

.step-heading {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  margin-bottom: 24px;
}

.step-heading.compact {
  margin-bottom: 20px;
}

.step-number {
  flex: 0 0 auto;
  min-width: 34px;
  padding-top: 4px;
  color: var(--coral);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.step-heading h2 {
  margin: 0;
  font-size: 20px;
  letter-spacing: -0.025em;
}

.step-heading p {
  margin: 5px 0 0;
  color: var(--muted);
  font-size: 13px;
}

.drop-zone {
  min-height: 190px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  border: 1.5px dashed rgba(22, 119, 95, 0.42);
  border-radius: 21px;
  background:
    linear-gradient(135deg, rgba(119, 216, 188, 0.08), transparent 55%),
    rgba(255, 255, 255, 0.56);
  transition: 180ms ease;
}

.drop-zone:hover,
.drop-zone.is-dragging {
  border-color: var(--mint-dark);
  background-color: rgba(119, 216, 188, 0.1);
  transform: translateY(-2px);
}

.drop-zone input {
  position: absolute;
  width: 1px;
  height: 1px;
  opacity: 0;
}

.upload-note {
  width: 52px;
  height: 52px;
  margin-bottom: 13px;
  display: grid;
  place-items: center;
  border-radius: 18px 18px 18px 5px;
  color: var(--mint-dark);
  background: rgba(119, 216, 188, 0.26);
  font-size: 25px;
}

.drop-zone strong {
  font-size: 16px;
}

.drop-zone > span:not(.upload-note) {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.drop-zone small {
  margin-top: 14px;
  color: #88908a;
  font-size: 13px;
}

.file-card {
  min-height: 82px;
  padding: 14px;
  display: flex;
  align-items: center;
  gap: 13px;
  border: 1px solid rgba(22, 119, 95, 0.2);
  border-radius: var(--radius-md);
  background: rgba(119, 216, 188, 0.08);
}

.file-icon {
  width: 48px;
  height: 48px;
  display: grid;
  place-items: center;
  border-radius: 13px;
  color: #fff;
  background: var(--mint-dark);
  font-size: 13px;
  font-weight: 900;
  letter-spacing: 0.08em;
}

.file-main {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.file-main strong {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 13px;
}

.file-main span {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
}

.icon-button {
  padding: 8px 10px;
  border: 0;
  border-radius: 10px;
  color: var(--muted);
  background: transparent;
  font-size: 13px;
}

.icon-button:hover {
  color: var(--ink);
  background: rgba(23, 33, 29, 0.06);
}

.analysis-state {
  margin-top: 14px;
  display: flex;
  align-items: center;
  gap: 9px;
  color: var(--muted);
  font-size: 13px;
}

.mini-loader {
  width: 14px;
  height: 14px;
  border: 2px solid rgba(22, 119, 95, 0.18);
  border-top-color: var(--mint-dark);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.analysis-result {
  margin-top: 14px;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.fact {
  padding: 11px 12px;
  display: flex;
  flex-direction: column;
  gap: 3px;
  border-radius: 12px;
  background: rgba(23, 33, 29, 0.035);
}

.fact span {
  color: var(--muted);
  font-size: 13px;
}

.fact strong {
  font-size: 13px;
}

.field-grid {
  display: grid;
  gap: 18px;
}

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

.field,
.range-field {
  display: flex;
  flex-direction: column;
  gap: 8px;
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.field small {
  min-height: 2.6em;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.45;
}

.field select,
.field input[type="number"],
.field input[type="text"] {
  width: 100%;
  min-height: 45px;
  padding: 0 13px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink);
  background: var(--surface-solid);
  font-size: 13px;
}

.field select:hover,
.field input:hover {
  border-color: rgba(22, 119, 95, 0.38);
}

fieldset {
  min-width: 0;
  margin: 0;
  padding: 0;
  border: 0;
}

legend {
  margin-bottom: 8px;
}

.segmented {
  padding: 4px;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  background: rgba(23, 33, 29, 0.035);
}

.segmented input {
  position: absolute;
  opacity: 0;
}

.segmented span {
  height: 35px;
  display: grid;
  place-items: center;
  border-radius: 8px;
  color: var(--muted);
  font-size: 13px;
  transition: 150ms ease;
}

.segmented input:checked + span {
  color: var(--ink);
  background: var(--surface-solid);
  box-shadow: 0 3px 12px rgba(23, 33, 29, 0.09);
}

.range-field {
  margin-top: 24px;
}

.range-field > span:first-child {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.range-field output {
  min-width: 54px;
  padding: 5px 8px;
  border-radius: 8px;
  color: var(--mint-dark);
  background: rgba(119, 216, 188, 0.17);
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 13px;
  text-align: center;
}

.range-field input[type="range"] {
  width: 100%;
  height: 5px;
  appearance: none;
  border-radius: 99px;
  background: linear-gradient(90deg, var(--mint-dark) var(--range-value, 55%), rgba(23, 33, 29, 0.11) var(--range-value, 55%));
}

.range-field input[type="range"]::-webkit-slider-thumb {
  width: 21px;
  height: 21px;
  appearance: none;
  border: 4px solid var(--surface-solid);
  border-radius: 50%;
  background: var(--mint-dark);
  box-shadow: 0 2px 8px rgba(22, 119, 95, 0.27);
}

.range-labels {
  display: flex;
  justify-content: space-between;
  color: var(--muted);
  font-weight: 500;
}

.preset-note {
  margin-top: 23px;
  padding: 12px 14px;
  display: flex;
  gap: 10px;
  border-radius: 13px;
  color: #335148;
  background: rgba(119, 216, 188, 0.1);
}

.preset-note > span {
  color: var(--mint-dark);
  font-weight: 900;
}

.preset-note p {
  margin: 0;
  font-size: 13px;
  line-height: 1.65;
}

.harmony-grid {
  align-items: start;
}

.number-unit,
.scale-selects {
  display: flex;
  align-items: center;
  gap: 8px;
}

.number-unit input {
  min-width: 0;
  flex: 1;
}

.number-unit > span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.scale-selects select:first-child {
  flex: 0 0 76px;
}

.scale-selects select:last-child {
  min-width: 0;
  flex: 1;
}

.harmony-fieldset {
  margin-top: 22px;
}

.harmony-scale-field {
  margin-bottom: 10px;
}

.harmony-scale-field .field-note {
  min-height: 0;
}

.harmony-scale-note {
  margin: 0 0 15px;
  padding: 11px 13px;
  border-left: 3px solid var(--coral);
  border-radius: 0 10px 10px 0;
  color: var(--muted);
  background: rgba(255, 128, 108, 0.07);
  font-size: 13px;
  font-weight: 500;
  line-height: 1.6;
}

.harmony-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.harmony-chips input {
  position: absolute;
  opacity: 0;
}

.harmony-chips span {
  min-width: 70px;
  padding: 9px 12px;
  display: inline-flex;
  justify-content: center;
  border: 1px solid var(--line);
  border-radius: 999px;
  color: var(--muted);
  background: var(--surface-solid);
  font-size: 13px;
  transition: 140ms ease;
}

.harmony-chips input:checked + span {
  border-color: var(--mint-dark);
  color: #fff;
  background: var(--mint-dark);
  box-shadow: 0 4px 14px rgba(22, 119, 95, 0.18);
}

.advanced-panel {
  padding: 0;
  overflow: hidden;
}

.advanced-panel summary {
  padding: 24px 28px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  list-style: none;
  cursor: pointer;
}

.advanced-panel summary::-webkit-details-marker {
  display: none;
}

.advanced-panel summary > span:first-child {
  display: flex;
  align-items: flex-start;
}

.advanced-panel summary strong,
.advanced-panel summary small {
  display: block;
}

.advanced-panel summary strong {
  font-size: 16px;
}

.advanced-panel summary small {
  margin-top: 4px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.summary-action {
  padding: 7px 10px;
  border-radius: 9px;
  color: var(--muted);
  background: rgba(23, 33, 29, 0.05);
  font-size: 13px;
  font-weight: 700;
}

.advanced-panel[open] .summary-action::before {
  content: "閉じる";
  font-size: 13px;
}

.advanced-panel[open] .summary-action {
  font-size: 0;
}

.advanced-content {
  padding: 0 28px 28px;
  border-top: 1px solid var(--line);
  padding-top: 25px;
}

.rule-fieldset {
  margin-top: 25px;
}

.duration-fieldset {
  margin-top: 25px;
  padding: 16px;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(23, 33, 29, 0.018);
}

.fieldset-note {
  margin: -2px 0 13px;
  color: var(--muted);
  font-size: 13px;
  font-weight: 500;
}

.duration-grid {
  display: grid;
  grid-template-columns: minmax(130px, 1fr) minmax(150px, 1.2fr) 92px;
  align-items: center;
  gap: 8px 10px;
}

.duration-grid label {
  color: var(--ink);
  font-size: 13px;
  font-weight: 700;
}

.duration-heading {
  color: var(--muted);
  font-size: 13px;
  font-weight: 700;
}

.duration-grid select,
.duration-grid input {
  width: 100%;
  min-width: 0;
  min-height: 38px;
  padding: 0 9px;
  border: 1px solid var(--line);
  border-radius: 9px;
  color: var(--ink);
  background: var(--surface-solid);
  font-size: 13px;
}

.duration-grid input:disabled {
  opacity: 0.42;
  background: rgba(23, 33, 29, 0.035);
}

.rule-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 7px;
}

.rule-grid label {
  padding: 9px 10px;
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--muted);
  background: var(--surface-solid);
  font-size: 13px;
  font-weight: 550;
}

.rule-grid input {
  accent-color: var(--coral);
}

.action-column {
  position: sticky;
  top: 20px;
}

.action-card {
  position: relative;
  overflow: hidden;
  padding: 28px;
  border: 1px solid rgba(23, 33, 29, 0.13);
  border-radius: var(--radius-lg);
  background: var(--ink);
  color: #f8f7f2;
  box-shadow: var(--shadow);
}

.action-card::after {
  content: "";
  position: absolute;
  width: 220px;
  height: 220px;
  top: -140px;
  right: -90px;
  border: 42px solid rgba(119, 216, 188, 0.1);
  border-radius: 50%;
}

.action-topline {
  position: relative;
  z-index: 1;
  display: flex;
  justify-content: space-between;
  color: rgba(255, 255, 255, 0.45);
  font-size: 13px;
  font-weight: 800;
  letter-spacing: 0.13em;
}

.action-topline span:last-child {
  color: var(--mint);
}

.action-card h2 {
  margin: 18px 0 23px;
  font-size: 22px;
  letter-spacing: -0.035em;
}

.summary-list {
  margin: 0;
}

.summary-list > div {
  padding: 11px 0;
  display: flex;
  justify-content: space-between;
  gap: 12px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.085);
  font-size: 13px;
}

.summary-list dt {
  color: rgba(255, 255, 255, 0.48);
}

.summary-list dd {
  margin: 0;
  max-width: 62%;
  overflow: hidden;
  text-overflow: ellipsis;
  color: rgba(255, 255, 255, 0.9);
  text-align: right;
  white-space: nowrap;
}

.primary-button {
  width: 100%;
  height: 57px;
  margin-top: 25px;
  padding: 0 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  border: 0;
  border-radius: 16px;
  color: #0b3d32;
  background: var(--mint);
  font-size: 13px;
  font-weight: 850;
  transition: 160ms ease;
}

.primary-button:hover:not(:disabled) {
  background: #92e5cd;
  transform: translateY(-2px);
  box-shadow: 0 10px 24px rgba(119, 216, 188, 0.18);
}

.primary-button:disabled {
  cursor: not-allowed;
  opacity: 0.38;
}

.button-arrow {
  font-size: 20px;
  font-weight: 400;
}

.action-help {
  margin: 10px 0 0;
  color: rgba(255, 255, 255, 0.38);
  font-size: 13px;
  text-align: center;
}

.progress,
.success-card,
.error-card {
  margin-top: 18px;
  padding: 14px;
  border-radius: 13px;
}

.progress {
  background: rgba(255, 255, 255, 0.06);
}

.progress-track {
  height: 4px;
  overflow: hidden;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.1);
}

.progress-track span {
  width: 42%;
  height: 100%;
  display: block;
  border-radius: 99px;
  background: var(--mint);
  animation: loading 1.2s ease-in-out infinite alternate;
}

@keyframes loading {
  from { transform: translateX(-30%); }
  to { transform: translateX(170%); }
}

.progress p {
  margin: 9px 0 0;
  color: rgba(255, 255, 255, 0.6);
  font-size: 13px;
}

.success-card {
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 10px;
  color: #dffbef;
  background: rgba(119, 216, 188, 0.12);
}

.success-mark {
  width: 25px;
  height: 25px;
  display: grid;
  place-items: center;
  border-radius: 50%;
  color: var(--ink);
  background: var(--mint);
  font-weight: 900;
}

.success-card strong,
.error-card strong {
  font-size: 13px;
}

.success-card p,
.error-card p {
  margin: 4px 0 0;
  font-size: 13px;
  line-height: 1.5;
}

.success-card button {
  grid-column: 2;
  width: fit-content;
  padding: 0;
  border: 0;
  color: var(--mint);
  background: transparent;
  font-size: 13px;
  text-decoration: underline;
}

.error-card {
  color: #ffe4df;
  background: rgba(255, 128, 108, 0.13);
}

.aside-note {
  margin: 13px 15px 0;
  display: flex;
  gap: 8px;
  color: var(--muted);
  font-size: 13px;
  line-height: 1.55;
}

.aside-note > span {
  color: var(--coral);
}

footer {
  width: min(1180px, calc(100% - 40px));
  margin: 70px auto 0;
  padding: 22px 0 34px;
  display: flex;
  justify-content: center;
  border-top: 1px solid var(--line);
  color: var(--muted);
  font-size: 13px;
  letter-spacing: 0.05em;
}

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

  .action-column {
    position: static;
    grid-row: 1;
  }

  .action-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    column-gap: 24px;
  }

  .action-topline,
  .action-card h2,
  .summary-list {
    grid-column: 1;
  }

  .primary-button,
  .action-help,
  .progress,
  .success-card,
  .error-card {
    grid-column: 2;
  }

  .primary-button {
    grid-row: 2 / span 2;
    align-self: end;
  }
}

@media (max-width: 640px) {
  .site-header,
  main,
  footer {
    width: min(100% - 24px, 1180px);
  }

  .privacy-badge {
    padding: 8px;
    font-size: 0;
  }

  .hero {
    padding: 22px 8px 28px;
  }

  .hero-copy {
    font-size: 13px;
  }

  .panel,
  .action-card {
    padding: 22px;
    border-radius: 22px;
  }

  .two-columns,
  .analysis-result,
  .rule-grid {
    grid-template-columns: 1fr;
  }

  .analysis-result {
    grid-template-columns: repeat(2, 1fr);
  }

  .action-card {
    display: block;
  }

  .primary-button {
    margin-top: 24px;
  }

  .advanced-panel {
    padding: 0;
  }

  .advanced-panel summary {
    padding: 22px;
  }

  .advanced-content {
    padding: 22px;
  }

  .duration-grid {
    grid-template-columns: minmax(0, 1fr) 88px;
  }

  .duration-heading {
    display: none;
  }

  .duration-grid label {
    grid-column: 1 / -1;
    margin-top: 5px;
  }

  footer {
    margin-top: 48px;
    gap: 16px;
    flex-direction: column;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}