.running-pace-calculator {
  --rpc-paper: #f8efe2;
  --rpc-paper-soft: #fff8ed;
  --rpc-paper-green: #e2edd8;
  --rpc-paper-blue: #dbe9ec;
  --rpc-paper-gold: #ddbf6f;
  --rpc-paper-rose: #f1ded2;
  --rpc-line: #6b5745;
  --rpc-line-strong: #34281f;
  --rpc-text: #34281f;
  --rpc-muted: #574838;
  --rpc-soft-muted: #7a6a57;
  --rpc-focus: #4f7d94;
  --rpc-shadow: rgba(82, 65, 50, 0.26);
  width: min(100% - 32px, 1180px);
  margin: 20px auto 24px;
  padding: 18px;
  color: var(--rpc-text);
  font-family: 'Noto Sans KR', 'Malgun Gothic', -apple-system, BlinkMacSystemFont, sans-serif;
  line-height: 1.45;
  background:
    linear-gradient(rgba(107, 87, 69, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(107, 87, 69, 0.055) 1px, transparent 1px),
    var(--rpc-paper);
  background-size: 18px 18px, 18px 18px, auto;
  border: 2px solid var(--rpc-line);
  box-shadow: 8px 8px 0 var(--rpc-shadow);
  box-sizing: border-box;
}

.running-pace-calculator,
.running-pace-calculator *,
.running-pace-calculator *::before,
.running-pace-calculator *::after {
  box-sizing: border-box;
}

.running-pace-calculator .calculator-header {
  margin: 0 0 14px;
  padding: 0 0 12px;
  text-align: center;
  border-bottom: 3px double var(--rpc-line);
}

.running-pace-calculator .calculator-header h2 {
  margin: 0 0 6px;
  color: var(--rpc-line-strong);
  font-size: 28px;
  font-weight: 800;
  line-height: 1.2;
  text-shadow: 2px 2px 0 rgba(255, 248, 237, 0.8);
}

.running-pace-calculator .subtitle {
  margin: 0;
  color: var(--rpc-muted);
  font-size: 14px;
  font-weight: 600;
}

.running-pace-calculator .example-buttons {
  display: grid;
  grid-template-columns: repeat(4, minmax(0, 1fr));
  gap: 10px;
  margin: 0 0 14px;
}

.running-pace-calculator .btn-example,
.running-pace-calculator .btn-clear {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 40px;
  padding: 8px 12px;
  color: var(--rpc-text);
  font: inherit;
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
  text-align: center;
  background: var(--rpc-paper-soft);
  border: 1px solid var(--rpc-line);
  border-radius: 0;
  box-shadow: 3px 3px 0 rgba(82, 65, 50, 0.22);
  cursor: pointer;
  transition: transform 0.16s ease, box-shadow 0.16s ease, background-color 0.16s ease;
}

.running-pace-calculator .btn-example:hover,
.running-pace-calculator .btn-clear:hover {
  background: var(--rpc-paper-green);
  transform: translate(1px, 1px);
  box-shadow: 2px 2px 0 rgba(82, 65, 50, 0.22);
}

.running-pace-calculator .btn-example:active,
.running-pace-calculator .btn-clear:active {
  transform: translate(3px, 3px);
  box-shadow: none;
}

.running-pace-calculator .btn-example:focus-visible,
.running-pace-calculator .btn-clear:focus-visible,
.running-pace-calculator .calc-input:focus-visible,
.running-pace-calculator .select-input:focus-visible {
  outline: 3px solid var(--rpc-focus);
  outline-offset: 2px;
}

.running-pace-calculator .btn-example[data-example='intermediate'] {
  background: var(--rpc-paper-blue);
}

.running-pace-calculator .btn-example[data-example='advanced'],
.running-pace-calculator .btn-clear {
  background: var(--rpc-paper-gold);
}

.running-pace-calculator .calculator-main,
.running-pace-calculator .calculator-secondary {
  display: grid;
  align-items: start;
  gap: 14px;
  margin: 0 0 14px;
}

.running-pace-calculator .calculator-main {
  grid-template-columns: repeat(3, minmax(0, 1fr));
}

.running-pace-calculator .calculator-secondary {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.running-pace-calculator .section {
  min-width: 0;
  padding: 15px;
  background: var(--rpc-paper-soft);
  border: 2px solid var(--rpc-line);
  box-shadow: 4px 4px 0 rgba(82, 65, 50, 0.18);
}

.running-pace-calculator .pace-section {
  background:
    linear-gradient(rgba(107, 87, 69, 0.035) 1px, transparent 1px),
    linear-gradient(90deg, rgba(107, 87, 69, 0.035) 1px, transparent 1px),
    #f8f3e8;
  background-size: 16px 16px, 16px 16px, auto;
}

.running-pace-calculator .time-section,
.running-pace-calculator .quick-section {
  background: var(--rpc-paper-green);
}

.running-pace-calculator .distance-section {
  background: #f4eadf;
}

.running-pace-calculator .speed-converter-section {
  background: #f7eddf;
}

.running-pace-calculator .section-title {
  display: flex;
  align-items: center;
  gap: 7px;
  margin: 0 0 12px;
  padding: 0 0 8px;
  color: var(--rpc-line-strong);
  font-size: 17px;
  font-weight: 800;
  line-height: 1.2;
  border-bottom: 1px solid var(--rpc-line);
}

.running-pace-calculator .input-group {
  margin: 0 0 12px;
}

.running-pace-calculator .input-group:last-of-type {
  margin-bottom: 0;
}

.running-pace-calculator .input-group label {
  display: block;
  margin: 0 0 5px;
  color: var(--rpc-muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.2;
}

.running-pace-calculator .input-row,
.running-pace-calculator .time-inputs {
  display: flex;
  align-items: center;
  gap: 7px;
  min-width: 0;
}

.running-pace-calculator .time-inputs {
  flex-wrap: wrap;
}

.running-pace-calculator .calc-input,
.running-pace-calculator .select-input {
  min-height: 38px;
  padding: 8px 10px;
  color: var(--rpc-text);
  font: inherit;
  font-size: 15px;
  font-weight: 800;
  background: #fff8ed;
  border: 1px solid var(--rpc-line);
  border-radius: 0;
  box-shadow: inset 1px 1px 0 rgba(82, 65, 50, 0.08);
}

.running-pace-calculator .calc-input {
  flex: 1 1 0;
  min-width: 0;
  width: 100%;
}

.running-pace-calculator .time-input {
  flex: 0 0 54px;
  width: 54px;
  padding-right: 6px;
  padding-left: 6px;
  text-align: center;
}

.running-pace-calculator .select-input {
  flex: 0 0 86px;
  width: 86px;
  cursor: pointer;
}

.running-pace-calculator .calc-input:focus,
.running-pace-calculator .select-input:focus {
  background: #fff4cf;
  border-color: var(--rpc-focus);
  outline: none;
}

.running-pace-calculator .unit-label,
.running-pace-calculator .unit-display {
  flex: 0 0 auto;
  color: var(--rpc-muted);
  font-size: 13px;
  font-weight: 800;
  white-space: nowrap;
}

.running-pace-calculator .unit-display {
  min-height: 38px;
  padding: 9px 10px;
  background: var(--rpc-paper-green);
  border: 1px solid var(--rpc-line);
}

.running-pace-calculator .result-box,
.running-pace-calculator .quick-results {
  margin-top: 12px;
  padding: 10px;
  background: rgba(255, 248, 237, 0.82);
  border: 1px dashed var(--rpc-line);
}

.running-pace-calculator .result-box.compact {
  margin-top: 8px;
  padding: 8px 10px;
}

.running-pace-calculator .result-item,
.running-pace-calculator .quick-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  min-width: 0;
}

.running-pace-calculator .result-item + .result-item {
  margin-top: 7px;
}

.running-pace-calculator .result-label,
.running-pace-calculator .distance-name {
  color: var(--rpc-muted);
  font-size: 14px;
  font-weight: 800;
  line-height: 1.25;
}

.running-pace-calculator .result-value,
.running-pace-calculator .distance-time {
  min-width: 0;
  color: var(--rpc-text);
  font-family: 'Courier New', ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 16px;
  font-weight: 900;
  line-height: 1.2;
  text-align: right;
  overflow-wrap: anywhere;
}

.running-pace-calculator .result-value.highlight {
  display: inline-flex;
  align-items: center;
  justify-content: flex-end;
  min-height: 32px;
  padding: 3px 8px;
  color: #241c15;
  background: var(--rpc-paper-gold);
  border: 1px solid var(--rpc-line);
  box-shadow: 2px 2px 0 rgba(82, 65, 50, 0.16);
}

.running-pace-calculator .divider {
  position: relative;
  margin: 13px 0;
  padding: 0;
  text-align: center;
}

.running-pace-calculator .divider::before {
  position: absolute;
  top: 50%;
  right: 0;
  left: 0;
  height: 1px;
  background: var(--rpc-line);
  content: '';
}

.running-pace-calculator .divider span {
  position: relative;
  z-index: 1;
  display: inline-flex;
  padding: 2px 10px;
  color: var(--rpc-muted);
  font-size: 12px;
  font-weight: 900;
  background: var(--rpc-paper-soft);
  border: 1px solid var(--rpc-line);
}

.running-pace-calculator .quick-results {
  display: grid;
  gap: 7px;
  background: rgba(255, 248, 237, 0.55);
  border-style: solid;
}

.running-pace-calculator .quick-item {
  min-height: 36px;
  padding: 7px 10px;
  background: var(--rpc-paper-soft);
  border: 1px solid var(--rpc-line);
  box-shadow: 2px 2px 0 rgba(82, 65, 50, 0.12);
}

.running-pace-calculator .distance-time {
  color: #7a412f;
}

.running-pace-calculator .footer-note {
  margin: 0;
  padding: 11px 12px;
  text-align: center;
  background: var(--rpc-paper-blue);
  border: 1px dashed var(--rpc-line);
}

.running-pace-calculator .footer-note p {
  margin: 0;
  color: var(--rpc-muted);
  font-size: 13px;
  font-weight: 700;
  line-height: 1.45;
}

body[data-scheme='dark'] .running-pace-calculator,
body[data-scheme='inverse'] .running-pace-calculator,
.dark-mode .running-pace-calculator {
  --rpc-paper: #2b2119;
  --rpc-paper-soft: #33271d;
  --rpc-paper-green: #344a32;
  --rpc-paper-blue: #263a3e;
  --rpc-paper-gold: #d2aa55;
  --rpc-paper-rose: #432b22;
  --rpc-line: #a98b6b;
  --rpc-line-strong: #f2e4cf;
  --rpc-text: #f2e4cf;
  --rpc-muted: #f0dfc5;
  --rpc-soft-muted: #d7c4a9;
  --rpc-focus: #d2aa55;
  --rpc-shadow: rgba(0, 0, 0, 0.42);
  background:
    linear-gradient(rgba(169, 139, 107, 0.08) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 139, 107, 0.08) 1px, transparent 1px),
    var(--rpc-paper);
  background-size: 18px 18px, 18px 18px, auto;
  box-shadow: 8px 8px 0 var(--rpc-shadow);
}

body[data-scheme='dark'] .running-pace-calculator .calculator-header h2,
body[data-scheme='inverse'] .running-pace-calculator .calculator-header h2,
.dark-mode .running-pace-calculator .calculator-header h2 {
  text-shadow: 2px 2px 0 rgba(0, 0, 0, 0.46);
}

body[data-scheme='dark'] .running-pace-calculator .btn-example,
body[data-scheme='dark'] .running-pace-calculator .btn-clear,
body[data-scheme='inverse'] .running-pace-calculator .btn-example,
body[data-scheme='inverse'] .running-pace-calculator .btn-clear,
.dark-mode .running-pace-calculator .btn-example,
.dark-mode .running-pace-calculator .btn-clear {
  color: #f2e4cf;
  background: #33271d;
  box-shadow: 3px 3px 0 rgba(0, 0, 0, 0.32);
}

body[data-scheme='dark'] .running-pace-calculator .btn-example:hover,
body[data-scheme='dark'] .running-pace-calculator .btn-clear:hover,
body[data-scheme='inverse'] .running-pace-calculator .btn-example:hover,
body[data-scheme='inverse'] .running-pace-calculator .btn-clear:hover,
.dark-mode .running-pace-calculator .btn-example:hover,
.dark-mode .running-pace-calculator .btn-clear:hover {
  background: #344a32;
}

body[data-scheme='dark'] .running-pace-calculator .btn-example[data-example='advanced'],
body[data-scheme='dark'] .running-pace-calculator .btn-clear,
body[data-scheme='inverse'] .running-pace-calculator .btn-example[data-example='advanced'],
body[data-scheme='inverse'] .running-pace-calculator .btn-clear,
.dark-mode .running-pace-calculator .btn-example[data-example='advanced'],
.dark-mode .running-pace-calculator .btn-clear {
  color: #241c15;
  background: #d2aa55;
}

body[data-scheme='dark'] .running-pace-calculator .pace-section,
body[data-scheme='inverse'] .running-pace-calculator .pace-section,
.dark-mode .running-pace-calculator .pace-section {
  background:
    linear-gradient(rgba(169, 139, 107, 0.055) 1px, transparent 1px),
    linear-gradient(90deg, rgba(169, 139, 107, 0.055) 1px, transparent 1px),
    #33271d;
  background-size: 16px 16px, 16px 16px, auto;
}

body[data-scheme='dark'] .running-pace-calculator .distance-section,
body[data-scheme='dark'] .running-pace-calculator .speed-converter-section,
body[data-scheme='inverse'] .running-pace-calculator .distance-section,
body[data-scheme='inverse'] .running-pace-calculator .speed-converter-section,
.dark-mode .running-pace-calculator .distance-section,
.dark-mode .running-pace-calculator .speed-converter-section {
  background: #33271d;
}

body[data-scheme='dark'] .running-pace-calculator .calc-input,
body[data-scheme='dark'] .running-pace-calculator .select-input,
body[data-scheme='inverse'] .running-pace-calculator .calc-input,
body[data-scheme='inverse'] .running-pace-calculator .select-input,
.dark-mode .running-pace-calculator .calc-input,
.dark-mode .running-pace-calculator .select-input {
  color: #f2e4cf;
  background: #241c15;
  border-color: #a98b6b;
}

body[data-scheme='dark'] .running-pace-calculator .calc-input:focus,
body[data-scheme='dark'] .running-pace-calculator .select-input:focus,
body[data-scheme='inverse'] .running-pace-calculator .calc-input:focus,
body[data-scheme='inverse'] .running-pace-calculator .select-input:focus,
.dark-mode .running-pace-calculator .calc-input:focus,
.dark-mode .running-pace-calculator .select-input:focus {
  color: #f2e4cf;
  background: #2b2119;
  border-color: #d2aa55;
}

body[data-scheme='dark'] .running-pace-calculator .result-box,
body[data-scheme='dark'] .running-pace-calculator .quick-results,
body[data-scheme='inverse'] .running-pace-calculator .result-box,
body[data-scheme='inverse'] .running-pace-calculator .quick-results,
.dark-mode .running-pace-calculator .result-box,
.dark-mode .running-pace-calculator .quick-results {
  background: rgba(36, 28, 21, 0.72);
}

body[data-scheme='dark'] .running-pace-calculator .quick-item,
body[data-scheme='inverse'] .running-pace-calculator .quick-item,
.dark-mode .running-pace-calculator .quick-item {
  background: #241c15;
}

body[data-scheme='dark'] .running-pace-calculator .divider span,
body[data-scheme='inverse'] .running-pace-calculator .divider span,
.dark-mode .running-pace-calculator .divider span {
  background: #33271d;
}

body[data-scheme='dark'] .running-pace-calculator .result-value.highlight,
body[data-scheme='inverse'] .running-pace-calculator .result-value.highlight,
.dark-mode .running-pace-calculator .result-value.highlight {
  color: #241c15;
}

body[data-scheme='dark'] .running-pace-calculator .footer-note,
body[data-scheme='inverse'] .running-pace-calculator .footer-note,
.dark-mode .running-pace-calculator .footer-note {
  background: #263a3e;
}

@media (max-width: 1080px) {
  .running-pace-calculator .calculator-main {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .running-pace-calculator .distance-section {
    grid-column: 1 / -1;
  }
}

@media (max-width: 820px) {
  .running-pace-calculator {
    width: min(100% - 20px, 720px);
    margin: 12px auto 18px;
    padding: 12px;
    box-shadow: 5px 5px 0 var(--rpc-shadow);
  }

  .running-pace-calculator .calculator-main,
  .running-pace-calculator .calculator-secondary,
  .running-pace-calculator .example-buttons {
    grid-template-columns: 1fr;
  }

  .running-pace-calculator .distance-section {
    grid-column: auto;
  }

  .running-pace-calculator .calculator-header h2 {
    font-size: 24px;
  }

  .running-pace-calculator .btn-example,
  .running-pace-calculator .btn-clear {
    width: 100%;
  }
}

@media (max-width: 480px) {
  .running-pace-calculator {
    width: min(100% - 12px, 420px);
    padding: 10px;
    border-width: 1px;
    box-shadow: 4px 4px 0 var(--rpc-shadow);
  }

  .running-pace-calculator .calculator-header h2 {
    font-size: 22px;
  }

  .running-pace-calculator .subtitle,
  .running-pace-calculator .footer-note p {
    font-size: 12px;
  }

  .running-pace-calculator .section {
    padding: 12px;
  }

  .running-pace-calculator .section-title {
    font-size: 15px;
  }

  .running-pace-calculator .input-row {
    gap: 6px;
  }

  .running-pace-calculator .time-inputs {
    gap: 5px;
  }

  .running-pace-calculator .calc-input,
  .running-pace-calculator .select-input {
    min-height: 36px;
    font-size: 14px;
  }

  .running-pace-calculator .time-input {
    flex-basis: 48px;
    width: 48px;
  }

  .running-pace-calculator .select-input {
    flex-basis: 76px;
    width: 76px;
  }

  .running-pace-calculator .unit-label,
  .running-pace-calculator .unit-display,
  .running-pace-calculator .result-label,
  .running-pace-calculator .distance-name {
    font-size: 12px;
  }

  .running-pace-calculator .result-value,
  .running-pace-calculator .distance-time {
    font-size: 14px;
  }
}