:root {
  --n-paper: #f6f0e6;
  --n-surface: #fffdf8;
  --n-surface-raised: #f0e6d5;
  --n-ink: #2c2521;
  --n-muted: #76695e;
  --n-border: #d9c7b1;
  --n-accent: #a7472b;
  --n-accent-soft: #f2d4bd;
  --n-string: #b87e4a;
  --n-low: #2d6b62;
  --n-low-soft: #d9ece7;
  --n-high: #ad3c32;
  --n-high-soft: #f5d9d4;
  --n-on-accent: #fff;
}

.theme-dark {
  --n-paper: #171514;
  --n-surface: #211e1c;
  --n-surface-raised: #2d2723;
  --n-ink: #f2e9dd;
  --n-muted: #b6a99b;
  --n-border: #4a3e34;
  --n-accent: #e18460;
  --n-accent-soft: #513128;
  --n-string: #e0a46b;
  --n-low: #69b2a3;
  --n-low-soft: #263e3a;
  --n-high: #ef8b7e;
  --n-high-soft: #4a2826;
  --n-on-accent: #1b1412;
}

.gst-tool {
  --n-tool-bg: var(--n-paper);
  --n-tool-surface: var(--n-surface);
  --n-tool-raised: var(--n-surface-raised);
  --n-tool-ink: var(--n-ink);
  --n-tool-muted: var(--n-muted);
  --n-tool-border: var(--n-border);
  --n-tool-accent: var(--n-accent);
  --n-tool-accent-soft: var(--n-accent-soft);
  --n-tool-string: var(--n-string);
  --n-tool-low: var(--n-low);
  --n-tool-low-soft: var(--n-low-soft);
  --n-tool-high: var(--n-high);
  --n-tool-high-soft: var(--n-high-soft);
  --n-tool-on-accent: var(--n-on-accent);

  background: var(--n-tool-surface);
  border: 1px solid var(--n-tool-border);
  border-radius: 1.4rem;
  color: var(--n-tool-ink);
  overflow: hidden;
}

.gst-form,
.gst-output {
  padding: clamp(1rem, 3vw, 2rem);
}

.gst-output {
  border-top: 1px solid var(--n-tool-border);
  background: var(--n-tool-bg);
}

.gst-unit-switch {
  display: inline-flex;
  padding: 0.22rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 999px;
  background: var(--n-tool-raised);
}

.gst-unit-button,
.gst-preset-list button,
.gst-select-trigger,
.gst-option {
  border: 0;
  color: var(--n-tool-ink);
  font: inherit;
  cursor: pointer;
}

.gst-unit-button {
  padding: 0.55rem 0.9rem;
  border-radius: 999px;
  background: transparent;
}

.gst-unit-button.gst-active,
.gst-preset-active {
  background: var(--n-tool-accent);
  color: var(--n-tool-on-accent);
}

.gst-controls-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.8rem;
  margin-top: 1.5rem;
}

.gst-field,
.gst-string-field {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
  color: var(--n-tool-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-select {
  position: relative;
}

.gst-select-trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0.9rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.7rem;
  background: var(--n-tool-bg);
  text-align: left;
}

.gst-select-trigger i {
  width: 0.55rem;
  height: 0.55rem;
  border-right: 2px solid var(--n-tool-accent);
  border-bottom: 2px solid var(--n-tool-accent);
  transform: rotate(45deg) translateY(-2px);
}

.gst-select-open .gst-select-trigger i {
  transform: rotate(225deg) translateY(-2px);
}

.gst-options {
  position: absolute;
  z-index: 5;
  top: calc(100% + 0.35rem);
  right: 0;
  left: 0;
  padding: 0.35rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.7rem;
  background: var(--n-tool-surface);
}

.gst-options[hidden] {
  display: none;
}

.gst-option {
  display: block;
  width: 100%;
  padding: 0.65rem 0.7rem;
  border-radius: 0.45rem;
  background: transparent;
  text-align: left;
}

.gst-option:hover,
.gst-option-active {
  background: var(--n-tool-accent-soft);
}

.gst-preset-block {
  margin-top: 1.5rem;
  padding-top: 1rem;
  border-top: 1px solid var(--n-tool-border);
}

.gst-preset-heading {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.7rem;
  color: var(--n-tool-ink);
  font-weight: 800;
}

.gst-preset-heading small {
  color: var(--n-tool-muted);
  font-size: 0.78rem;
  font-weight: 500;
}

.gst-preset-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
}

.gst-preset-list button {
  display: flex;
  flex-direction: column;
  gap: 0.2rem;
  min-width: 7rem;
  padding: 0.7rem 0.8rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.65rem;
  background: var(--n-tool-bg);
  text-align: left;
}

.gst-preset-list button strong {
  font-size: 1rem;
}

.gst-inputs {
  display: grid;
  grid-template-columns: minmax(10rem, 0.55fr) minmax(0, 1.45fr);
  gap: 1rem;
  margin-top: 1.5rem;
}

.gst-advanced {
  margin-top: 1rem;
  border-top: 1px solid var(--n-tool-border);
}

.gst-advanced summary {
  padding: 1rem 0 0.2rem;
  color: var(--n-tool-muted);
  cursor: pointer;
  font-size: 0.82rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-advanced[open] summary {
  color: var(--n-tool-accent);
}

.gst-length small {
  color: var(--n-tool-muted);
  font-size: 0.75rem;
  font-weight: 500;
  letter-spacing: 0;
  text-transform: none;
}

.gst-length input,
.gst-string-field input {
  width: 100%;
  min-height: 2.65rem;
  padding: 0.65rem 0.75rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.65rem;
  background: var(--n-tool-bg);
  color: var(--n-tool-ink);
  font: inherit;
  font-size: 1rem;
  letter-spacing: 0;
}

.gst-length input:disabled {
  opacity: 0.55;
}

.gst-string-fields {
  display: grid;
  grid-template-columns: repeat(6, minmax(3.6rem, 1fr));
  gap: 0.5rem;
}

.gst-string-field {
  position: relative;
  gap: 0.2rem;
}

.gst-string-id {
  color: var(--n-tool-accent);
  font-size: 0.7rem;
}

.gst-string-note {
  color: var(--n-tool-ink);
  font-size: 0.9rem;
  letter-spacing: 0;
}

.gst-string-caption,
.gst-string-field small {
  color: var(--n-tool-muted);
  font-size: 0.65rem;
  letter-spacing: 0;
}

.gst-summary {
  display: grid;
  grid-template-columns: minmax(13rem, 1fr) minmax(0, 1.7fr);
  gap: 1rem;
  align-items: stretch;
}

.gst-summary-total,
.gst-summary-metrics {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 0.45rem;
  padding: 1.2rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.9rem;
  background: var(--n-tool-surface);
}

.gst-summary-total span,
.gst-summary-metrics span {
  color: var(--n-tool-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-summary-total strong {
  color: var(--n-tool-accent);
  font-size: clamp(2.2rem, 5vw, 4rem);
  line-height: 1;
}

.gst-summary-metrics {
  display: grid;
  grid-template-columns: 1fr;
  gap: 0.8rem;
}

.gst-summary-metrics b {
  color: var(--n-tool-ink);
  font-size: 1.5rem;
}

.gst-status {
  display: inline-flex;
  width: fit-content;
  padding: 0.24rem 0.5rem;
  border-radius: 999px;
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-status-low {
  background: var(--n-tool-low-soft);
  color: var(--n-tool-low);
}

.gst-status-balanced {
  background: var(--n-tool-accent-soft);
  color: var(--n-tool-accent);
}

.gst-status-high {
  background: var(--n-tool-high-soft);
  color: var(--n-tool-high);
}

.gst-profile {
  margin: 1.2rem 0 0;
  padding: 1rem;
  border: 1px solid var(--n-tool-border);
  border-radius: 0.9rem;
  background: var(--n-tool-surface);
}

.gst-profile h3 {
  margin-bottom: 0.5rem;
  color: var(--n-tool-muted);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-profile-list {
  display: grid;
  gap: 0.65rem;
}

.gst-profile-row {
  display: grid;
  grid-template-columns: 1.5rem 3rem minmax(0, 1fr) 4.5rem;
  gap: 0.7rem;
  align-items: center;
  font-size: 0.85rem;
}

.gst-profile-row > span:first-child {
  color: var(--n-tool-muted);
  font-size: 0.75rem;
  font-weight: 800;
}

.gst-profile-row strong {
  color: var(--n-tool-ink);
}

.gst-profile-row b {
  color: var(--n-tool-ink);
  text-align: right;
  white-space: nowrap;
}

.gst-profile-bar {
  display: block;
  height: 0.7rem;
  overflow: hidden;
  border-radius: 999px;
  background: var(--n-tool-raised);
}

.gst-profile-bar i {
  display: block;
  height: 100%;
  min-width: 0.45rem;
  border-radius: inherit;
}

.gst-profile-bar .gst-string-low {
  background: var(--n-tool-low);
}

.gst-profile-bar .gst-string-balanced {
  background: var(--n-tool-string);
}

.gst-profile-bar .gst-string-high {
  background: var(--n-tool-high);
}

.gst-table-wrap {
  overflow-x: auto;
  margin-top: 1.2rem;
}

.gst-table-wrap table {
  width: 100%;
  border-collapse: collapse;
  min-width: 42rem;
  font-size: 0.88rem;
}

.gst-table-wrap caption {
  padding-bottom: 0.6rem;
  color: var(--n-tool-muted);
  text-align: left;
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.gst-table-wrap th,
.gst-table-wrap td {
  padding: 0.75rem 0.55rem;
  border-bottom: 1px solid var(--n-tool-border);
  text-align: left;
}

.gst-table-wrap th {
  color: var(--n-tool-muted);
  font-size: 0.7rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.gst-table-wrap td strong {
  display: block;
  color: var(--n-tool-ink);
}

.gst-table-wrap td small {
  color: var(--n-tool-muted);
}

.gst-note {
  margin: 1rem 0 0;
  color: var(--n-tool-muted);
  font-size: 0.82rem;
  line-height: 1.55;
}

button:focus-visible,
input:focus-visible {
  outline: 3px solid var(--n-tool-accent);
  outline-offset: 2px;
}

@media (max-width: 800px) {
  .gst-controls-grid,
  .gst-inputs,
  .gst-summary {
    grid-template-columns: 1fr;
  }

  .gst-string-fields {
    grid-template-columns: repeat(3, minmax(4.5rem, 1fr));
  }
}

@media (max-width: 480px) {
  .gst-form,
  .gst-output {
    padding: 0.85rem;
  }

  .gst-summary-metrics {
    grid-template-columns: 1fr;
  }

  .gst-preset-list button {
    min-width: calc(50% - 0.3rem);
  }
}