/* Layout & theme: dark chrome, clear display, dense keypad */

:root {
  --brand-icon-bg: #d9468f;
  --bg-chrome: #132b45;
  --bg-app: #1a1d23;
  --bg-panel: #22262e;
  --bg-key: #2e3440;
  --bg-key-hover: #3b4252;
  --bg-num: #3d4454;
  --bg-num-hover: #4c566a;
  --accent: #5e81ac;
  --accent-bright: #88c0d0;
  --op: #d08770;
  --op-hover: #ebcb8b;
  --mem: #a3be8c;
  --text: #eceff4;
  --text-dim: #aeb3bb;
  --border: #3b4252;
  --display-bg: #0d0f12;
  --danger: #bf616a;
  --radius: 6px;
  --font-mono: "Consolas", "Cascadia Mono", "SF Mono", ui-monospace, monospace;
  --font-ui: "Segoe UI", system-ui, sans-serif;
}

*,
*::before,
*::after {
  box-sizing: border-box;
}

html {
  font-size: 18px;
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  min-height: 100dvh;
  font-family: var(--font-ui);
  background: var(--bg-app);
  color: var(--text);
  line-height: 1.5;
  -webkit-tap-highlight-color: rgba(136, 192, 208, 0.15);
}

a {
  color: var(--accent-bright);
}

a:hover {
  text-decoration: underline;
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.app {
  --app-inline: 1rem;
  max-width: 1200px;
  margin: 0 auto;
  position: relative;
  z-index: 0;
  padding-top: max(0.75rem, env(safe-area-inset-top, 0px));
  padding-left: max(var(--app-inline), env(safe-area-inset-left, 0px));
  padding-right: max(var(--app-inline), env(safe-area-inset-right, 0px));
  padding-bottom: max(2rem, calc(0.75rem + env(safe-area-inset-bottom, 0px)));
}

.top-bar {
  display: flex;
  flex-direction: column;
  gap: 0;
  position: relative;
  isolation: isolate;
  padding-top: 1rem;
  padding-bottom: 0.85rem;
  background: transparent;
  border-bottom: none;
  min-height: 7.5rem;
}

.top-bar:has(.header-cat-dropdown.is-open) {
  z-index: 3;
}

/* Full-viewport chrome only; header content stays .app width */
.top-bar::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: 0;
  z-index: -1;
  background: var(--bg-chrome);
  border-bottom: 1px solid rgba(136, 192, 208, 0.2);
  pointer-events: none;
  box-sizing: border-box;
}

.top-bar-main {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: flex-start;
  gap: 0.75rem 0.85rem;
  padding-bottom: 0.5rem;
}

.header-category-bar {
  display: flex;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0.2rem;
  padding-top: 0.5rem;
  margin-top: 0.1rem;
  border-top: 1px solid rgba(136, 192, 208, 0.18);
  overflow-x: auto;
  overflow-y: visible;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
  min-height: 2.85rem;
}

.header-cat-dropdown {
  position: relative;
  flex: 0 0 auto;
}

.header-cat-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  height: 100%;
  min-height: 2.75rem;
  padding: 0.45rem 0.75rem 0.45rem 0.85rem;
  touch-action: manipulation;
  font-family: inherit;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-dim);
  background: var(--bg-key);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  cursor: pointer;
  white-space: nowrap;
  transition: background 0.12s ease, color 0.12s ease, border-color 0.12s ease;
}

.header-cat-trigger::after {
  content: "";
  width: 0;
  height: 0;
  border-left: 4px solid transparent;
  border-right: 4px solid transparent;
  border-top: 5px solid currentColor;
  opacity: 0.75;
  margin-top: 2px;
}

.header-cat-trigger:hover,
.header-cat-dropdown.is-open .header-cat-trigger {
  background: var(--bg-key-hover);
  color: var(--accent-bright);
  border-color: var(--accent);
}

.header-cat-dropdown.is-open .header-cat-trigger::after {
  opacity: 1;
}

/* Full-viewport dim: lives inside .app so it sits above workspace (z-index 0) but below .top-bar when menu is open */
.header-cat-backdrop {
  position: fixed;
  inset: 0;
  z-index: 1;
  margin: 0;
  padding: 0;
  border: none;
  background: rgba(10, 12, 16, 0.45);
  cursor: default;
}

.header-cat-backdrop[hidden] {
  display: none !important;
}

.header-cat-panel {
  position: fixed;
  left: 0;
  top: 0;
  z-index: 2;
  min-width: min(18rem, calc(100vw - 1.5rem));
  max-width: min(22rem, calc(100vw - 1.5rem));
  max-height: min(70vh, 22rem);
  overflow-y: auto;
  padding: 0.35rem 0;
  margin: 0;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.55);
  -webkit-overflow-scrolling: touch;
}

/* Per-category overlay: width shrinks/grows with longest labels (capped to viewport) */
.header-cat-panel.header-cat-panel--category {
  min-width: 0;
  width: fit-content;
  max-width: calc(100vw - 1.5rem);
  max-height: none;
  padding: 0.45rem 0;
  overflow: visible;
  overflow-y: visible;
}

.header-cat-panel--category .header-cat-list {
  display: flex;
  flex-direction: column;
  flex-wrap: nowrap;
  align-items: stretch;
  gap: 0.12rem;
  padding: 0.35rem 0.75rem 0.55rem;
  list-style: none;
  margin: 0;
  width: max-content;
  max-width: calc(100vw - 1.5rem);
  box-sizing: border-box;
}

.header-cat-panel--category .header-cat-list li {
  flex: 0 0 auto;
  width: 100%;
  min-width: 0;
}

.header-cat-panel--category .header-cat-link {
  display: block;
  width: 100%;
  box-sizing: border-box;
  white-space: nowrap;
  text-align: left;
  font-size: 0.82rem;
  padding: 0.38rem 0.55rem;
  border-radius: 4px;
}

@media (max-width: 420px) {
  .header-cat-panel--category .header-cat-link {
    white-space: normal;
  }
}

.header-cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.header-cat-list li {
  margin: 0;
}

.header-cat-link {
  display: block;
  width: 100%;
  text-align: left;
  padding: 0.4rem 0.85rem;
  font-family: inherit;
  font-size: 0.78rem;
  line-height: 1.35;
  border: none;
  background: transparent;
  color: #90caf9;
  cursor: pointer;
  text-decoration: none;
  box-sizing: border-box;
}

.header-cat-link:hover,
.header-cat-link:focus-visible {
  background: var(--bg-key-hover);
  color: var(--accent-bright);
  outline: none;
}

/* Standalone “All tools” page (hash #all-tools) */
.all-tools-page {
  min-width: 0;
}

.all-tools-page-intro {
  margin: 0 0 1rem;
  font-size: 0.9rem;
  color: var(--text-dim);
  line-height: 1.45;
}

.all-tools-inner {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(15rem, 1fr));
  gap: 1rem 1.35rem;
}

.all-tools-group {
  min-width: 0;
}

.all-tools-heading {
  margin: 0 0 0.45rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: #81c784;
}

.all-tools-page .cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.all-tools-page .cat-list li {
  margin: 0.12rem 0;
}

.static-page-view {
  min-width: 0;
}

.static-page-view--standalone .static-prose h1 {
  margin: 0 0 0.75rem;
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--text);
}

.brand--link {
  text-decoration: none;
}

.workspace--satellite {
  display: block;
  padding: 0.5rem 0.35rem 1.5rem;
}

.top-bar--satellite .top-bar-main {
  flex-wrap: wrap;
  gap: 0.35rem;
}

.satellite-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem 1rem;
  align-items: center;
  font-size: 0.88rem;
}

.satellite-nav a {
  color: var(--accent-bright);
  text-decoration: none;
}

.satellite-nav a:hover {
  text-decoration: underline;
}

a.header-all-tools-btn {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

.static-prose {
  max-width: 52rem;
  margin: 0 auto;
  padding: 0 0.15rem 1rem;
  font-size: 0.92rem;
  line-height: 1.55;
}

.static-prose h2 {
  margin: 0 0 0.65rem;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--text);
  letter-spacing: 0.01em;
}

.static-prose h3 {
  margin: 1.15rem 0 0.4rem;
  font-size: 0.98rem;
  font-weight: 600;
  color: var(--accent-bright);
}

.static-prose p {
  margin: 0.55rem 0;
  color: var(--text-dim);
}

.static-prose ul {
  margin: 0.45rem 0 0.55rem;
  padding-left: 1.35rem;
  color: var(--text-dim);
}

.static-prose li {
  margin: 0.35rem 0;
}

.static-prose a {
  color: var(--accent-bright);
}

.static-prose a:hover {
  text-decoration: underline;
}

.static-prose code {
  font-family: var(--font-mono);
  font-size: 0.86em;
  padding: 0.1em 0.35em;
  border-radius: 4px;
  background: var(--display-bg);
  color: var(--accent-bright);
}

.static-legal-note {
  font-size: 0.84rem;
  border-left: 3px solid var(--accent);
  padding: 0.5rem 0 0.5rem 0.85rem;
  margin: 1rem 0 !important;
  background: rgba(94, 129, 172, 0.08);
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--text-dim);
}

.static-faq {
  margin: 0;
}

.static-faq dt {
  margin: 1rem 0 0.25rem;
  font-weight: 600;
  color: var(--text);
}

.static-faq dt:first-child {
  margin-top: 0;
}

.static-faq dd {
  margin: 0 0 0.35rem;
  padding: 0;
  color: var(--text-dim);
}

.static-contact-list {
  list-style: none;
  margin: 0.75rem 0;
  padding: 0;
}

.static-contact-list li {
  margin: 0.5rem 0;
  color: var(--text-dim);
}

.footer-nav {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: center;
  gap: 0.25rem 0.45rem;
  margin: 0 0 0.85rem;
  font-size: 0.8rem;
}

.footer-nav a {
  display: inline-block;
  padding: 0.35rem 0.15rem;
  min-height: 2.25rem;
  line-height: 1.5;
  color: var(--accent-bright);
  text-decoration: none;
}

.footer-nav a:hover {
  text-decoration: underline;
}

.footer-nav-sep {
  color: var(--text-dim);
  user-select: none;
}

.top-bar-main {
  position: relative;
  z-index: 1;
}

.top-bar-main .brand {
  flex: 0 0 auto;
  order: -1;
  margin-right: 0.35rem;
  position: relative;
  z-index: 2;
}

.global-search {
  position: relative;
  flex: 1 1 12rem;
  min-width: 10rem;
  max-width: min(28rem, 100%);
}

.top-bar-main .header-all-tools-btn {
  flex: 0 0 auto;
  align-self: center;
  white-space: nowrap;
  font-size: 0.875rem;
  padding: 0.45rem 0.75rem;
}

.tool-search-input {
  width: 100%;
  box-sizing: border-box;
  min-height: 2.75rem;
  padding: 0.5rem 0.65rem 0.5rem 2rem;
  font-family: var(--font-ui);
  /* ≥16px prevents iOS Safari zoom-on-focus on many devices */
  font-size: max(16px, 1rem);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--display-bg) url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2388c0d0' viewBox='0 0 16 16'%3E%3Cpath d='M11.7 10.3l3.1 3.1-1.1 1.1-3.1-3.1a6 6 0 10-1.1-1.1zM6.5 11a4.5 4.5 0 110-9 4.5 4.5 0 010 9z'/%3E%3C/svg%3E") no-repeat 0.55rem 50%;
  color: var(--text);
}

.tool-search-input::placeholder {
  color: var(--text-dim);
}

.tool-search-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.search-results {
  position: absolute;
  z-index: 200;
  left: 0;
  right: 0;
  top: calc(100% + 4px);
  margin: 0;
  padding: 0.25rem 0;
  list-style: none;
  max-height: min(60vh, 20rem);
  overflow-y: auto;
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.35);
}

.search-results[hidden] {
  display: none !important;
}

.search-results li {
  margin: 0;
}

.search-hit {
  display: block;
  width: 100%;
  min-height: 2.5rem;
  padding: 0.5rem 0.75rem;
  border: none;
  background: transparent;
  color: var(--text);
  font-family: inherit;
  font-size: 0.82rem;
  text-align: left;
  cursor: pointer;
  touch-action: manipulation;
}

.search-hit:hover,
.search-hit.is-active {
  background: var(--bg-key-hover);
  color: var(--accent-bright);
}

.search-hit .search-hit-id {
  display: block;
  font-size: 0.68rem;
  color: var(--text-dim);
  font-family: var(--font-mono);
  margin-top: 0.15rem;
}

.page-title {
  flex: 1 1 100%;
  min-width: 0;
  margin: 0;
  font-size: clamp(0.85rem, 2.5vw, 1.05rem);
  font-weight: 600;
  text-align: center;
  color: var(--text-dim);
  order: 10;
}

.page-subtitle {
  flex: 1 1 100%;
  width: 100%;
  order: 11;
  margin: 0.2rem 0 0;
  padding: 0 0.25rem;
  box-sizing: border-box;
  font-size: clamp(0.68rem, 1.85vw, 0.8rem);
  font-weight: 400;
  line-height: 1.45;
  text-align: center;
  color: var(--text-dim);
  opacity: 0.92;
  max-width: 40rem;
  margin-left: auto;
  margin-right: auto;
}

.page-subtitle[hidden] {
  display: none !important;
}

@media (min-width: 720px) {
  .page-title {
    flex: 1 1 auto;
    order: 0;
  }

  .page-subtitle {
    order: 12;
  }
}

.brand {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.25rem;
  margin: 0;
  padding: 0;
  font: inherit;
  text-align: left;
  color: inherit;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: var(--radius);
}

.brand:hover .brand-text {
  color: var(--text);
}

.brand:hover .brand-icon {
  filter: brightness(1.08);
}

.brand:focus-visible {
  outline: 2px solid var(--accent-bright);
  outline-offset: 3px;
}

.brand-logo {
  display: inline-flex;
  flex-direction: row;
  align-items: center;
  gap: 0.08rem;
  max-width: min(100%, 32rem);
  pointer-events: none;
}

.brand-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex: 0 0 auto;
  width: 1.58em;
  height: 1.58em;
  margin-left: 0.06em;
  border-radius: 0.22em;
  background: var(--brand-icon-bg);
  color: #fff;
  font-weight: 800;
  font-size: clamp(0.98rem, 2.9vw, 1.4rem);
  line-height: 1;
  letter-spacing: 0;
}

.brand-text {
  font-weight: 700;
  font-size: clamp(1.05rem, 3.2vw, 1.55rem);
  letter-spacing: 0.02em;
  line-height: 1.2;
  color: var(--text);
  word-break: break-word;
  text-align: left;
  margin-left: -0.1em;
}

.mode-tabs {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.tab {
  font-family: inherit;
  font-size: 0.875rem;
  padding: 0.45rem 0.9rem;
  min-height: 2.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-key);
  color: var(--text-dim);
  cursor: pointer;
  touch-action: manipulation;
}

.tab:hover {
  background: var(--bg-key-hover);
  color: var(--text);
}

.tab.active {
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
}

/* Main layout: catalog | content [ | history when scientific ] */
.workspace {
  display: grid;
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr);
  gap: 1rem;
  margin-top: 1rem;
  align-items: start;
  position: relative;
  z-index: 0;
}

.workspace.with-side {
  grid-template-columns: minmax(200px, 240px) minmax(0, 1fr) minmax(220px, 280px);
}

.workspace:not(.with-side) .side-panel {
  display: none;
}

.workspace-main {
  min-width: 0;
}

.catalog-nav {
  max-height: calc(100vh - 5.5rem);
  overflow-y: auto;
  padding: 0.65rem 0.5rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--bg-panel);
}

.cat-block {
  margin-bottom: 1rem;
}

.cat-block:last-child {
  margin-bottom: 0;
}

.cat-title {
  font-size: 0.72rem;
  font-weight: 700;
  color: #81c784;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin: 0 0 0.45rem;
  padding-bottom: 0.3rem;
  border-bottom: 1px solid var(--border);
}

.cat-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.cat-list li {
  margin: 0.12rem 0;
}

.cat-link {
  display: block;
  width: 100%;
  text-align: left;
  font-family: inherit;
  font-size: 0.78rem;
  line-height: 1.35;
  padding: 0.25rem 0.35rem;
  border: none;
  border-radius: 4px;
  background: transparent;
  color: #90caf9;
  cursor: pointer;
  text-decoration: none;
  box-sizing: border-box;
}

.cat-link:hover {
  background: var(--bg-key);
  color: var(--accent-bright);
  text-decoration: underline;
}

.tool-surface {
  min-width: 0;
}

.home-intro {
  font-size: 0.85rem;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.home-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: 1rem 1.25rem;
}

.home-cat {
  font-size: 0.8rem;
  font-weight: 700;
  color: #81c784;
  margin: 0 0 0.5rem;
  padding-bottom: 0.35rem;
  border-bottom: 1px solid var(--border);
}

.home-links {
  list-style: none;
  margin: 0;
  padding: 0;
}

.home-links li {
  margin: 0.2rem 0;
}

.tool-page {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem 1.1rem;
  margin-bottom: 1rem;
}

.tool-heading {
  margin: 0 0 0.35rem;
  font-size: 1.15rem;
  font-weight: 600;
  color: var(--accent-bright);
}

.tool-disclaimer {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin: 0 0 1rem;
}

.tool-fields {
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
  max-width: 32rem;
}

.tool-fields .f-row {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.tool-fields .f-lab {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.tool-fields .f-row--date {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.date-input-wrap {
  display: flex;
  align-items: stretch;
  max-width: 22rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  overflow: hidden;
  background: var(--display-bg);
  color-scheme: dark;
}

.date-input-wrap:focus-within {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.date-input-wrap .date-native {
  flex: 1 1 auto;
  min-width: 0;
  width: 100%;
  border: none !important;
  border-radius: 0 !important;
  padding: 0.5rem 0.55rem;
  background: transparent;
  color: var(--text);
  font-family: var(--font-mono);
  font-size: max(16px, 0.9rem);
}

.date-picker-btn {
  flex: 0 0 auto;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.65rem;
  min-width: 2.65rem;
  min-height: 2.5rem;
  padding: 0;
  margin: 0;
  border: none;
  border-left: 1px solid var(--border);
  background: var(--bg-key);
  color: var(--accent-bright);
  cursor: pointer;
  overflow: hidden;
  line-height: 0;
  flex-shrink: 0;
}

.date-picker-btn:hover,
.date-picker-btn:focus-visible {
  background: var(--accent);
  color: #fff;
  outline: none;
}

.date-picker-btn:active {
  filter: brightness(0.95);
}

.date-picker-chevron {
  display: block;
  pointer-events: none;
}

.date-field-hint {
  font-size: 0.72rem;
  color: var(--text-dim);
  line-height: 1.35;
}

.date-field-hint abbr {
  text-decoration: underline dotted;
  cursor: help;
}

.tool-fields input[type="text"],
.tool-fields input[type="number"],
.tool-fields input[type="time"],
.tool-fields select,
.tool-fields textarea {
  font-family: var(--font-mono);
  font-size: max(16px, 0.9rem);
  padding: 0.5rem 0.55rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--display-bg);
  color: var(--text);
}

.tool-fields textarea {
  resize: vertical;
  min-height: 4rem;
}

.field-note {
  font-size: 0.75rem;
  color: var(--text-dim);
  margin: 0.25rem 0 0;
}

.field-note a {
  color: var(--accent-bright);
}

.timecard-wrap {
  overflow-x: auto;
  margin: 0.75rem 0 1rem;
  max-width: 100%;
}

.timecard-table {
  width: 100%;
  min-width: 420px;
  border-collapse: collapse;
  font-size: 0.8rem;
}

.timecard-table th,
.timecard-table td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.4rem;
  text-align: center;
}

.timecard-table th[scope="row"] {
  text-align: left;
  color: var(--text-dim);
  font-weight: 600;
}

.tc-cell {
  width: 100%;
  min-width: 4.5rem;
  font-family: var(--font-mono);
  font-size: max(16px, 0.85rem);
  padding: 0.45rem 0.45rem;
  min-height: 2.5rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--display-bg);
  color: var(--text);
}

.timecard-result {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
}

.timecard-result th,
.timecard-result td {
  border: 1px solid var(--border);
  padding: 0.4rem 0.5rem;
  text-align: right;
}

.timecard-result th:first-child,
.timecard-result td:first-child {
  text-align: left;
}

.f-inline {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.5rem;
}

.tool-calc-btn {
  margin-top: 0.75rem;
}

.tool-result {
  margin-top: 1rem;
  padding: 0.75rem;
  background: var(--display-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.9rem;
}

.tool-result p {
  margin: 0.35rem 0;
}

.amort-tbl {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.75rem;
  margin-top: 0.5rem;
}

.amort-tbl th,
.amort-tbl td {
  border: 1px solid var(--border);
  padding: 0.35rem 0.45rem;
  text-align: right;
}

.amort-tbl th:first-child,
.amort-tbl td:first-child {
  text-align: center;
}

.pwd-out {
  word-break: break-all;
  font-size: 0.85rem;
}

@media (max-width: 1100px) {
  .home-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .workspace,
  .workspace.with-side {
    grid-template-columns: 1fr;
  }

  .workspace.with-side .side-panel {
    display: block;
    position: static;
    max-height: none;
  }

  .catalog-nav {
    max-height: none;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.75rem 1rem;
  }

  .catalog-nav .cat-block {
    margin-bottom: 0;
  }
}

@media (max-width: 560px) {
  .home-grid,
  .catalog-nav {
    grid-template-columns: 1fr;
  }

  .f-inline {
    grid-template-columns: 1fr;
  }

  .all-tools-inner {
    grid-template-columns: 1fr;
  }

  .cat-link {
    min-height: 2.75rem;
    padding: 0.55rem 0.45rem;
    display: flex;
    align-items: center;
  }

  .header-cat-link {
    min-height: 2.6rem;
    padding: 0.5rem 0.85rem;
    display: flex;
    align-items: center;
  }

  .top-bar-main .header-all-tools-btn {
    min-height: 2.75rem;
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .top-bar-main .brand {
    min-height: 2.75rem;
  }

  .tool-calc-btn .btn-primary {
    width: 100%;
    box-sizing: border-box;
    min-height: 2.85rem;
  }

  .display-mode select {
    font-size: max(16px, 0.8rem);
    min-height: 2.75rem;
  }

  .toggle-btn {
    min-height: 2.5rem;
    padding: 0.45rem 0.75rem;
  }

  #view-core select {
    font-size: max(16px, 0.8rem);
    min-height: 2.5rem;
  }
}

.calc-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  min-width: 0;
}

.panel[hidden] {
  display: none !important;
}

.toolbar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.75rem 1rem;
  margin-bottom: 0.75rem;
}

.angle-group,
.base-group {
  display: flex;
  gap: 0.25rem;
}

.toggle-btn {
  font-family: inherit;
  font-size: 0.8rem;
  padding: 0.35rem 0.65rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-key);
  color: var(--text-dim);
  cursor: pointer;
}

.toggle-btn:hover {
  background: var(--bg-key-hover);
}

.toggle-btn.active {
  background: #434c5e;
  color: var(--accent-bright);
  border-color: var(--accent);
}

.display-mode {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.display-mode select {
  font-family: inherit;
  font-size: 0.8rem;
  padding: 0.35rem 0.5rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--display-bg);
  color: var(--text);
}

.chk {
  font-size: 0.8rem;
  color: var(--text-dim);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  cursor: pointer;
}

.expression-wrap {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}

.expr-input {
  width: 100%;
  min-height: 4.5rem;
  padding: 0.65rem 0.75rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  line-height: 1.4;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: var(--display-bg);
  color: var(--text);
  resize: vertical;
}

.expr-input:focus {
  outline: 2px solid var(--accent);
  outline-offset: 1px;
}

.expr-actions {
  display: flex;
  gap: 0.5rem;
  justify-content: flex-end;
}

.btn-ghost,
.btn-primary,
.btn-icon {
  font-family: inherit;
  cursor: pointer;
  border-radius: var(--radius);
  border: 1px solid var(--border);
}

.btn-ghost {
  padding: 0.4rem 0.75rem;
  min-height: 2.5rem;
  box-sizing: border-box;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: transparent;
  color: var(--text-dim);
  font-size: 0.85rem;
  touch-action: manipulation;
}

.btn-ghost:hover {
  background: var(--bg-key);
  color: var(--text);
}

.btn-ghost.small {
  min-height: 0;
  padding: 0.25rem 0.5rem;
  font-size: 0.75rem;
  margin-bottom: 0.5rem;
}

.btn-primary {
  padding: 0.45rem 1.25rem;
  min-height: 2.75rem;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 600;
  font-size: 1rem;
  touch-action: manipulation;
}

.btn-primary:hover {
  filter: brightness(1.08);
}

.btn-icon {
  padding: 0.35rem 0.6rem;
  font-size: 0.75rem;
  background: var(--bg-key);
  color: var(--text);
}

.btn-icon:hover {
  background: var(--bg-key-hover);
}

.result-row {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  flex-wrap: wrap;
  padding: 0.6rem 0.75rem;
  background: var(--display-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  margin-bottom: 1rem;
}

.result-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-dim);
}

.result-out {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 1.15rem;
  word-break: break-all;
  min-height: 1.5em;
}

.keypad {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.key-row {
  display: flex;
  gap: 0.35rem;
  flex-wrap: wrap;
}

.key {
  flex: 1 1 auto;
  min-width: 3rem;
  min-height: 2.75rem;
  padding: 0.55rem 0.35rem;
  font-family: inherit;
  font-size: 0.85rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--bg-key);
  color: var(--text);
  cursor: pointer;
  transition: background 0.12s ease;
  touch-action: manipulation;
}

.key:hover {
  background: var(--bg-key-hover);
}

.key.fn {
  background: #343a46;
  font-size: 0.78rem;
}

.key.num {
  background: var(--bg-num);
  font-weight: 600;
  font-size: 0.95rem;
}

.key.num:hover {
  background: var(--bg-num-hover);
}

.key.op {
  background: #4c3f38;
  color: #fff;
  border-color: #5c4a42;
}

.key.op:hover {
  background: #5e4d44;
}

.key.mem {
  background: #3d4a3d;
  color: var(--mem);
  border-color: #4a5c4a;
}

.key.mem:hover {
  background: #4a5a4a;
}

.key.wide {
  flex: 1.4 1 auto;
}

.key.wide-eq {
  flex: 2 1 auto;
  background: var(--accent);
  color: #fff;
  border-color: var(--accent);
  font-weight: 700;
  font-size: 1rem;
}

.key.wide-eq:hover {
  filter: brightness(1.1);
}

.key.fn.wide.active {
  box-shadow: inset 0 0 0 2px var(--accent-bright);
  color: var(--accent-bright);
}

.mem-row {
  align-items: center;
}

.mem-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: 2rem;
  padding: 0.35rem;
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--text-dim);
  opacity: 0.35;
}

.mem-indicator.active {
  opacity: 1;
  color: var(--mem);
}

.sci-keypad.second-active .key-row--funcs .key.fn:not(.wide) {
  filter: brightness(1.15);
}

.hint {
  margin: 1rem 0 0;
  font-size: 0.78rem;
  color: var(--text-dim);
}

.hint code,
.hint kbd {
  font-family: var(--font-mono);
  font-size: 0.9em;
  background: var(--display-bg);
  padding: 0.1em 0.35em;
  border-radius: 3px;
}

/* Programmer */
.prog-displays {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
  margin-bottom: 0.75rem;
}

.prog-line {
  display: grid;
  grid-template-columns: 3rem 1fr;
  align-items: center;
  gap: 0.5rem;
}

.prog-lab {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-dim);
}

.prog-field {
  width: 100%;
  padding: 0.45rem 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.95rem;
  border: 1px solid var(--border);
  border-radius: 4px;
  background: var(--display-bg);
  color: var(--text);
}

.prog-field:focus {
  outline: 2px solid var(--accent);
}

.prog-keypad .key {
  min-width: 2.75rem;
  font-size: 0.75rem;
}

/* Converter */
.conv-block {
  margin-bottom: 1.25rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--border);
}

.conv-block:last-child {
  border-bottom: 0;
  margin-bottom: 0;
  padding-bottom: 0;
}

.conv-block h3 {
  margin: 0 0 0.5rem;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--accent-bright);
}

.conv-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
}

.conv-input {
  width: 6.5rem;
  padding: 0.4rem 0.5rem;
  font-family: var(--font-mono);
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--display-bg);
  color: var(--text);
}

.conv-row select {
  max-width: 10rem;
  padding: 0.4rem 0.35rem;
  font-size: 0.8rem;
  border-radius: 4px;
  border: 1px solid var(--border);
  background: var(--bg-key);
  color: var(--text);
}

.conv-arrow {
  color: var(--text-dim);
  font-size: 0.9rem;
}

.conv-out {
  flex: 1;
  min-width: 8rem;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  padding: 0.35rem 0.5rem;
  background: var(--display-bg);
  border-radius: 4px;
  border: 1px solid var(--border);
}

/* Side panel */
.side-panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  position: sticky;
  top: 0.75rem;
  max-height: calc(100vh - 2rem);
  overflow: auto;
}

.side-panel h2 {
  margin: 0 0 0.35rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.side-panel h2:not(:first-child) {
  margin-top: 1.25rem;
}

.history-list {
  list-style: none;
  margin: 0;
  padding: 0;
}

.history-list li {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 0.45rem 0.5rem;
  margin-bottom: 0.35rem;
  background: var(--display-bg);
  border-radius: 4px;
  border: 1px solid transparent;
  cursor: pointer;
  word-break: break-word;
}

.history-list li:hover {
  border-color: var(--accent);
}

.history-list .h-expr {
  color: var(--text-dim);
  display: block;
  margin-bottom: 0.2rem;
}

.history-list .h-res {
  color: var(--accent-bright);
}

.clip-note {
  font-size: 0.78rem;
  color: var(--text-dim);
  margin: 0 0 0.35rem;
}

.clipboard-preview {
  margin: 0;
  padding: 0.5rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  background: var(--display-bg);
  border-radius: 4px;
  border: 1px solid var(--border);
  white-space: pre-wrap;
  word-break: break-all;
  min-height: 3rem;
}

.footer {
  position: relative;
  isolation: isolate;
  margin-top: 1.5rem;
  padding-top: 1rem;
  padding-bottom: max(0.85rem, env(safe-area-inset-bottom, 0px));
  background: transparent;
  border-top: none;
  font-size: 0.75rem;
  color: var(--text-dim);
}

.footer::before {
  content: "";
  position: absolute;
  left: 50%;
  transform: translateX(-50%);
  width: 100vw;
  top: 0;
  bottom: 0;
  z-index: -1;
  background: var(--bg-chrome);
  border-top: 1px solid rgba(136, 192, 208, 0.2);
  pointer-events: none;
  box-sizing: border-box;
}

.footer p {
  margin: 0;
  max-width: 70ch;
}

.footer p.footer-copyright {
  margin-top: 0;
  margin-left: auto;
  margin-right: auto;
  max-width: none;
  width: 100%;
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.02em;
}