:root {
  color-scheme: light;
  --bg: #eff0eb;
  --surface: #fffefa;
  --surface-strong: #ffffff;
  --ink: #111111;
  --muted: #626a5d;
  --line: #d9dfd0;
  --logo-green: #80a24d;
  --logo-green-light: #99cc66;
  --accent: #5f7a38;
  --accent-strong: #35471e;
  --accent-soft: #edf5e7;
  --time-soft: #edf4fa;
  --time: #496076;
  --warn: #b2452c;
  --warn-soft: #fff0ea;
  --shadow: 0 18px 45px rgba(35, 42, 32, 0.11);
  font-family:
    Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI",
    sans-serif;
}

* {
  box-sizing: border-box;
}

body {
  min-height: 100vh;
  margin: 0;
  background:
    linear-gradient(135deg, rgba(128, 162, 77, 0.18), transparent 34%),
    linear-gradient(225deg, rgba(153, 204, 102, 0.13), transparent 30%),
    var(--bg);
  color: var(--ink);
}

button,
input,
select,
summary,
textarea {
  font: inherit;
}

.app-shell {
  width: min(1480px, calc(100vw - 32px));
  min-height: calc(100vh - 32px);
  margin: 16px auto;
  display: grid;
  grid-template-rows: auto auto auto minmax(470px, 1fr) auto auto auto;
  gap: 14px;
}

.top-bar,
.control-panel,
.input-panel,
.output-panel,
.math-panel,
.snippet-panel {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.86);
  box-shadow: var(--shadow);
}

.top-bar {
  position: relative;
  z-index: 3;
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  align-items: start;
  padding: 18px;
  backdrop-filter: blur(18px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 14px;
  min-width: 0;
}

.brand-logo {
  width: 72px;
  height: 72px;
  flex: 0 0 auto;
  object-fit: contain;
  filter: drop-shadow(0 8px 14px rgba(35, 42, 32, 0.14));
}

.eyebrow {
  margin: 0 0 3px;
  color: var(--accent);
  font-size: 0.78rem;
  font-weight: 800;
  text-transform: uppercase;
}

h1 {
  margin: 0;
  font-size: clamp(1.65rem, 2.6vw, 2.45rem);
  line-height: 1.05;
  letter-spacing: 0;
}

.action-bar {
  position: relative;
  z-index: 4;
  display: flex;
  flex-wrap: wrap;
  justify-content: flex-start;
  align-items: center;
  gap: 8px;
  width: 100%;
}

.tools-menu {
  position: relative;
}

.tools-menu summary {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 14px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
  cursor: pointer;
  font-weight: 800;
  list-style: none;
  transition:
    border-color 120ms ease,
    background 120ms ease;
}

.tools-menu summary::-webkit-details-marker {
  display: none;
}

.tools-menu summary::after {
  content: "";
  width: 7px;
  height: 7px;
  border-right: 2px solid currentColor;
  border-bottom: 2px solid currentColor;
  transform: translateY(-2px) rotate(45deg);
}

.tools-menu[open] summary {
  border-color: rgba(128, 162, 77, 0.6);
  background: var(--accent-soft);
}

.tools-menu-list {
  position: absolute;
  top: calc(100% + 6px);
  left: 0;
  z-index: 10;
  min-width: 210px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  box-shadow: var(--shadow);
}

.tools-menu-list a {
  display: block;
  padding: 11px 12px;
  color: var(--ink);
  font-size: 0.9rem;
  font-weight: 800;
  text-decoration: none;
}

.tools-menu-list a + a {
  border-top: 1px solid var(--line);
}

.tools-menu-list a:hover,
.tools-menu-list a[aria-current="page"] {
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.control-panel,
.math-panel {
  position: relative;
  z-index: 2;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(390px, auto);
  gap: 12px;
  padding: 12px;
  background: rgba(255, 253, 248, 0.78);
  backdrop-filter: blur(14px);
}

.math-panel {
  grid-template-columns: 1fr;
}

.control-group {
  min-width: 0;
  display: grid;
  grid-template-columns: auto minmax(0, 1fr);
  align-items: center;
  gap: 10px;
}

.control-group-title {
  color: var(--accent);
  font-size: 0.76rem;
  font-weight: 900;
  text-transform: uppercase;
}

.control-row {
  min-width: 0;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
}

.field-label {
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

select,
button,
input {
  min-height: 40px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
}

select {
  padding: 0 34px 0 11px;
}

input {
  width: 92px;
  padding: 0 10px;
}

.checkbox-control {
  min-height: 40px;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 0 10px;
  border: 1px solid var(--line);
  border-radius: 8px;
  background: var(--surface-strong);
  color: var(--ink);
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 800;
}

.checkbox-control input {
  width: 16px;
  height: 16px;
  accent-color: var(--accent);
}

button {
  padding: 0 14px;
  cursor: pointer;
  font-weight: 800;
  transition:
    transform 120ms ease,
    border-color 120ms ease,
    background 120ms ease;
}

button:hover,
input:hover,
select:hover,
.checkbox-control:hover,
.tools-menu summary:hover {
  border-color: rgba(128, 162, 77, 0.6);
}

button:active {
  transform: translateY(1px);
}

.primary-button {
  border-color: var(--accent);
  background: var(--accent);
  color: white;
}

.primary-button:hover {
  border-color: var(--accent-strong);
  background: var(--accent-strong);
}

.ghost-button {
  background: transparent;
}

.status-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 38px;
}

.status-pill,
.stats {
  border: 1px solid var(--line);
  border-radius: 8px;
  background: rgba(255, 253, 248, 0.88);
  padding: 8px 12px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
}

.status-valid {
  border-color: rgba(128, 162, 77, 0.34);
  background: var(--accent-soft);
  color: var(--accent-strong);
}

.status-error {
  border-color: rgba(178, 69, 44, 0.3);
  background: var(--warn-soft);
  color: var(--warn);
}

.workspace-grid {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 0.88fr) minmax(0, 1.12fr);
  gap: 14px;
}

.snippet-grid {
  min-height: 0;
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 14px;
}

.input-panel,
.output-panel,
.snippet-panel {
  min-height: 0;
  display: grid;
  grid-template-rows: auto 1fr;
  overflow: hidden;
  background: var(--surface);
}

.pane-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 46px;
  padding: 0 14px;
  border-bottom: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.6);
}

.pane-header label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-weight: 900;
}

.pane-header span {
  flex: 0 0 auto;
  color: var(--muted);
  font-size: 0.85rem;
  font-weight: 700;
}

.input-body {
  min-height: 0;
  display: grid;
  grid-template-rows: 1fr auto;
}

textarea {
  width: 100%;
  height: 100%;
  min-height: 320px;
  resize: none;
  border: 0;
  outline: 0;
  padding: 18px;
  background: transparent;
  color: #142018;
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 1rem;
  line-height: 1.55;
  tab-size: 2;
}

.quick-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 8px;
  padding: 12px;
  border-top: 1px solid var(--line);
}

.output-rows {
  min-height: 0;
  overflow: auto;
  padding: 12px;
}

.output-row {
  display: grid;
  grid-template-columns: minmax(150px, 0.5fr) minmax(0, 1fr) auto;
  gap: 10px;
  align-items: center;
  min-height: 54px;
  padding: 10px 12px;
  border: 1px solid rgba(217, 223, 208, 0.85);
  border-radius: 8px;
  background: rgba(255, 255, 255, 0.62);
}

.snippet-row {
  grid-template-columns: minmax(140px, 0.36fr) minmax(0, 1fr) auto;
}

.output-row + .output-row {
  margin-top: 8px;
}

.output-label {
  color: var(--muted);
  font-size: 0.78rem;
  font-weight: 900;
  text-transform: uppercase;
}

.output-value {
  min-width: 0;
  overflow-wrap: anywhere;
  color: #142018;
  font-family:
    "Cascadia Code", "SFMono-Regular", Consolas, "Liberation Mono", monospace;
  font-size: 0.92rem;
}

.copy-row {
  min-width: 56px;
  min-height: 34px;
  padding: 0 10px;
  color: var(--accent);
}

.app-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  min-height: 38px;
  padding: 0 4px;
  color: var(--muted);
  font-size: 0.82rem;
  font-weight: 700;
}

.app-footer a {
  color: var(--accent);
  text-decoration-thickness: 2px;
  text-underline-offset: 3px;
}

.app-footer span:has([data-version]) {
  display: inline-flex;
  align-items: center;
  gap: 12px;
}

.app-footer [data-version] {
  color: var(--accent);
}

@media (max-width: 1040px) {
  .app-shell {
    width: min(100vw - 20px, 840px);
    min-height: calc(100vh - 20px);
    margin: 10px auto;
  }

  .control-panel,
  .workspace-grid,
  .snippet-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 620px) {
  .top-bar {
    padding: 14px;
  }

  .brand-lockup {
    gap: 10px;
  }

  .brand-logo {
    width: 58px;
    height: 58px;
  }

  .action-bar,
  .quick-grid {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
    width: 100%;
  }

  .control-row {
    display: grid;
    grid-template-columns: 1fr;
    width: 100%;
  }

  .control-row select,
  .control-row input:not([type="checkbox"]),
  .control-row button {
    width: 100%;
  }

  .control-group {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .tools-menu,
  .tools-menu summary {
    width: 100%;
  }

  .tools-menu-list {
    width: 100%;
  }

  .status-row,
  .app-footer {
    align-items: stretch;
    flex-direction: column;
  }

  .status-pill,
  .stats {
    width: 100%;
  }

  .output-row {
    grid-template-columns: 1fr;
    align-items: start;
  }

  .copy-row {
    width: 100%;
  }

  .app-footer span:has([data-version]) {
    align-items: flex-start;
    flex-direction: column;
    gap: 6px;
  }
}