:root {
  --duration-ink: #172033;
  --duration-navy: #1e3a8a;
  --duration-navy-deep: #172b65;
  --duration-paper: #fffefa;
  --duration-warm: #fff7e8;
  --duration-amber: #b45309;
  --duration-line: #dfe4ed;
}

html,
body {
  min-height: 100%;
  scrollbar-width: none;
}

html::-webkit-scrollbar,
body::-webkit-scrollbar {
  width: 0;
  height: 0;
}

body {
  overflow-y: auto;
}

.tool-page {
  display: grid;
  gap: clamp(18px, 3vw, 28px);
  min-height: 100%;
}

.hero {
  display: flex;
  align-items: end;
  justify-content: space-between;
  gap: 24px;
}

.eyebrow {
  margin: 0 0 5px;
  color: var(--duration-navy);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.18em;
}

.hero h1 {
  margin: 0 0 6px;
  color: var(--duration-ink);
  font-size: clamp(24px, 3.2vw, 34px);
  font-weight: 800;
  letter-spacing: -0.035em;
}

.hero > div > p:last-child {
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}

.rule-note {
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 300px;
  padding: 10px 13px 10px 10px;
  border: 1px solid #f0ddba;
  border-radius: 12px;
  background: var(--duration-warm);
  color: #754315;
  font-size: 12px;
  line-height: 1.5;
}

.rule-mark {
  flex: none;
  display: grid;
  place-items: center;
  min-width: 42px;
  height: 28px;
  border-radius: 7px;
  background: #f4dfb5;
  color: #874b0d;
  font-weight: 800;
  letter-spacing: 0.02em;
}

.calculator-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(300px, 0.8fr);
  overflow: hidden;
  border: 1px solid var(--duration-line);
  border-radius: 18px;
  background: var(--duration-paper);
  box-shadow: 0 18px 45px rgba(27, 39, 67, 0.09);
}

.calculator-panel {
  padding: clamp(22px, 3.4vw, 36px);
  background:
    linear-gradient(rgba(30, 58, 138, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 138, 0.025) 1px, transparent 1px),
    var(--duration-paper);
  background-size: 26px 26px;
}

.form-section + .form-section {
  margin-top: 29px;
  padding-top: 26px;
  border-top: 1px solid var(--duration-line);
}

.section-heading {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  margin-bottom: 17px;
}

.step-index {
  flex: none;
  display: grid;
  place-items: center;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  background: #e8edf8;
  color: var(--duration-navy);
  font-size: 11px;
  font-weight: 800;
}

.section-heading h2 {
  margin: 0 0 3px;
  color: var(--duration-ink);
  font-size: 16px;
  line-height: 1.35;
}

.section-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
  line-height: 1.5;
}

.start-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.field,
.duration-field {
  display: grid;
  gap: 7px;
}

.field-label {
  color: #536076;
  font-size: 12px;
  font-weight: 600;
}

.input {
  width: 100%;
  min-width: 0;
  height: 44px;
  padding: 10px 12px;
  border: 1px solid #cfd6e2;
  border-radius: 10px;
  background: rgba(255, 255, 255, 0.94);
  color: var(--duration-ink);
  font: inherit;
  font-size: 14px;
  transition: border-color 140ms ease, box-shadow 140ms ease, background 140ms ease;
}

.input:hover {
  border-color: #aeb9cb;
}

.input:focus {
  outline: none;
  border-color: rgba(30, 58, 138, 0.7);
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(30, 58, 138, 0.12);
}

.duration-fields {
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 10px;
}

.number-control {
  position: relative;
  display: block;
}

.number-control .input {
  padding-right: 47px;
  font-weight: 700;
}

.number-control > span {
  position: absolute;
  top: 50%;
  right: 12px;
  transform: translateY(-50%);
  color: #68758b;
  font-size: 12px;
  pointer-events: none;
}

.preset-row {
  display: flex;
  align-items: center;
  gap: 7px;
  flex-wrap: wrap;
  margin-top: 13px;
}

.preset-row > span {
  margin-right: 2px;
  color: var(--muted);
  font-size: 11px;
}

.preset {
  border: 1px solid #d8deea;
  border-radius: 999px;
  padding: 5px 10px;
  background: rgba(255, 255, 255, 0.82);
  color: #41506a;
  font: inherit;
  font-size: 11px;
  font-weight: 600;
  cursor: pointer;
  transition: border-color 140ms ease, color 140ms ease, background 140ms ease;
}

.preset:hover,
.preset:focus-visible,
.preset.active {
  outline: none;
  border-color: #9badd3;
  background: #edf1fa;
  color: var(--duration-navy);
}

.form-actions {
  display: flex;
  gap: 9px;
  margin-top: 27px;
}

.btn {
  min-height: 42px;
  border-radius: 10px;
  font: inherit;
  font-size: 13px;
}

.calculate-btn {
  min-width: 150px;
  background: var(--duration-navy);
  color: #ffffff;
  box-shadow: 0 8px 18px rgba(30, 58, 138, 0.19);
}

.calculate-btn:hover {
  background: var(--duration-navy-deep);
}

.form-message {
  min-height: 20px;
  margin: 8px 0 0;
  color: #b42318;
  font-size: 12px;
}

.result-panel {
  position: relative;
  display: flex;
  flex-direction: column;
  min-width: 0;
  padding: clamp(22px, 3.4vw, 36px);
  overflow: hidden;
  background: #eef1f6;
}

.result-panel::after {
  content: "";
  position: absolute;
  right: -55px;
  bottom: -75px;
  width: 180px;
  height: 180px;
  border: 34px solid rgba(30, 58, 138, 0.055);
  border-radius: 50%;
  pointer-events: none;
}

.result-topline {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  color: #536076;
  font-size: 12px;
  font-weight: 700;
}

.copy-button {
  border: 0;
  padding: 4px 0;
  background: transparent;
  color: var(--duration-navy);
  font: inherit;
  font-size: 12px;
  font-weight: 700;
  cursor: pointer;
}

.copy-button:disabled {
  color: #99a3b4;
  cursor: default;
}

.result-time {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 2px;
  margin-top: clamp(25px, 5vw, 48px);
  color: var(--duration-ink);
  font-variant-numeric: tabular-nums;
}

.result-date {
  font-size: clamp(19px, 2.5vw, 27px);
  font-weight: 700;
  letter-spacing: -0.025em;
}

.result-clock {
  color: var(--duration-navy);
  font-size: clamp(32px, 4.7vw, 52px);
  font-weight: 800;
  letter-spacing: -0.05em;
  line-height: 1.12;
}

.timeline {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  margin: 26px 0 23px;
}

.timeline-start,
.timeline-end {
  flex: none;
  width: 9px;
  height: 9px;
  border: 2px solid var(--duration-navy);
  border-radius: 50%;
  background: #eef1f6;
}

.timeline-end {
  background: var(--duration-navy);
}

.timeline-line {
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(90deg, #9aa7bd 0 6px, transparent 6px 10px);
}

.result-details {
  position: relative;
  z-index: 1;
  display: grid;
  gap: 14px;
  margin: 0;
}

.result-details > div {
  display: grid;
  gap: 4px;
}

.result-details dt {
  color: #69768a;
  font-size: 11px;
}

.result-details dd {
  margin: 0;
  color: #2c384d;
  font-size: 13px;
  font-weight: 600;
  line-height: 1.55;
  overflow-wrap: anywhere;
  font-variant-numeric: tabular-nums;
}

.example-note {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: flex-start;
  gap: 9px;
  margin-top: auto;
  padding-top: 25px;
  color: #667387;
  font-size: 11px;
  line-height: 1.55;
}

.example-note span {
  flex: none;
  display: grid;
  place-items: center;
  width: 21px;
  height: 21px;
  border-radius: 50%;
  background: #dde3ed;
  color: #526078;
  font-weight: 800;
}

.example-note p {
  margin: 1px 0 0;
}

.day-calculator {
  overflow: hidden;
  border: 1px solid var(--duration-line);
  border-radius: 18px;
  background: var(--duration-paper);
  box-shadow: 0 14px 36px rgba(27, 39, 67, 0.07);
}

.day-calculator-heading {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 20px;
  padding: 22px clamp(22px, 3.4vw, 36px) 18px;
  border-bottom: 1px solid var(--duration-line);
}

.section-kicker {
  display: block;
  margin-bottom: 4px;
  color: var(--duration-navy);
  font-size: 10px;
  font-weight: 800;
  letter-spacing: 0.15em;
}

.day-calculator-heading h2 {
  margin: 0 0 4px;
  color: var(--duration-ink);
  font-size: 18px;
}

.day-calculator-heading p {
  margin: 0;
  color: var(--muted);
  font-size: 12px;
}

.inclusive-badge {
  flex: none;
  padding: 6px 10px;
  border-radius: 999px;
  background: #e8edf8;
  color: var(--duration-navy);
  font-size: 11px;
  font-weight: 700;
}

.day-calculator-body {
  display: grid;
  grid-template-columns: minmax(0, 1.2fr) minmax(250px, 0.8fr);
}

.day-range-form {
  padding: clamp(22px, 3.4vw, 32px) clamp(22px, 3.4vw, 36px);
  background:
    linear-gradient(rgba(30, 58, 138, 0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(30, 58, 138, 0.025) 1px, transparent 1px),
    var(--duration-paper);
  background-size: 26px 26px;
}

.day-range-fields {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.day-range-actions {
  display: flex;
  gap: 9px;
  margin-top: 18px;
}

.day-count-result {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-width: 0;
  padding: clamp(22px, 3.4vw, 36px);
  background: #eef1f6;
  color: var(--duration-ink);
  font-variant-numeric: tabular-nums;
}

.day-count-label {
  color: #69768a;
  font-size: 11px;
}

.day-count-result strong {
  margin: 5px 0 8px;
  color: var(--duration-navy);
  font-size: clamp(34px, 5vw, 52px);
  letter-spacing: -0.045em;
  line-height: 1.1;
}

.date-result strong {
  font-size: clamp(27px, 4vw, 40px);
  letter-spacing: -0.035em;
  overflow-wrap: anywhere;
}

.day-count-range {
  color: #536076;
  font-size: 12px;
  line-height: 1.55;
  overflow-wrap: anywhere;
}

@media (max-width: 820px) {
  .calculator-layout {
    grid-template-columns: 1fr;
  }

  .day-calculator-body {
    grid-template-columns: 1fr;
  }

  .result-panel {
    min-height: 420px;
  }

  .example-note {
    margin-top: 24px;
  }
}

@media (max-width: 560px) {
  .hero {
    align-items: stretch;
    flex-direction: column;
    gap: 14px;
  }

  .rule-note {
    max-width: none;
  }

  .start-fields,
  .duration-fields,
  .day-range-fields {
    grid-template-columns: 1fr;
  }

  .duration-fields {
    gap: 12px;
  }

  .form-actions {
    align-items: stretch;
    flex-direction: column;
  }

  .form-actions .btn,
  .day-range-actions .btn {
    width: 100%;
  }

  .day-calculator-heading {
    align-items: flex-start;
    flex-direction: column;
    gap: 12px;
  }

  .day-range-actions {
    align-items: stretch;
    flex-direction: column;
  }
}

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