:root {
  color-scheme: light;
  --ink: oklch(27% 0.035 155);
  --ink-soft: oklch(43% 0.028 150);
  --paper: oklch(96% 0.018 88);
  --paper-deep: oklch(91% 0.025 82);
  --shelf: oklch(34% 0.055 155);
  --signal: oklch(67% 0.18 48);
  --signal-dark: oklch(47% 0.15 44);
  --line: oklch(77% 0.025 105);
  --danger: oklch(48% 0.15 28);
  --success: oklch(45% 0.09 150);
  --font-body: "Avenir Next", "Noto Sans TC", "PingFang TC", sans-serif;
  --font-display: "Iowan Old Style", "Noto Serif TC", "Songti TC", serif;
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

* { box-sizing: border-box; }
[hidden] { display: none !important; }

html { background: var(--paper); }

body {
  min-height: 100vh;
  margin: 0;
  padding: env(safe-area-inset-top) env(safe-area-inset-right) env(safe-area-inset-bottom) env(safe-area-inset-left);
  color: var(--ink);
  background:
    linear-gradient(90deg, transparent 0 94%, color-mix(in oklch, var(--line) 45%, transparent) 94% 94.2%, transparent 94.2%),
    var(--paper);
  font: 400 1rem/1.5 var(--font-body);
  font-kerning: normal;
}

button, input, textarea { font: inherit; }
button, summary, input[type="file"] { touch-action: manipulation; }

.skip-link {
  position: fixed;
  z-index: 20;
  top: 0;
  left: 1rem;
  padding: 0.75rem 1rem;
  color: var(--paper);
  background: var(--ink);
  transform: translateY(-120%);
}
.skip-link:focus { transform: translateY(0); }

.top-rule {
  min-height: 2rem;
  padding: 0.4rem max(1rem, env(safe-area-inset-left));
  color: var(--paper);
  background: var(--shelf);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.16em;
}

.masthead {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-md);
  padding: var(--space-lg) clamp(1rem, 4vw, 4rem);
  border-bottom: 1px solid var(--line);
}

.wordmark {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  color: inherit;
  font-size: 0.8rem;
  font-weight: 750;
  line-height: 1.05;
  letter-spacing: 0.04em;
  text-decoration: none;
  text-transform: uppercase;
}

.wordmark-mark {
  display: grid;
  width: 2.8rem;
  height: 2.8rem;
  place-items: center;
  color: var(--paper);
  background: var(--ink);
  font-family: var(--font-display);
  font-size: 1.35rem;
}
.wordmark-mark span { color: var(--signal); }

.masthead-note {
  display: none;
  max-width: 34ch;
  color: var(--ink-soft);
  font-size: 0.75rem;
  text-align: right;
}
.masthead-note strong { color: var(--ink); }
.masthead-actions { display: flex; align-items: center; gap: 0.65rem; }
.language-button {
  min-width: 2.8rem;
  min-height: 2.75rem;
  padding: 0.45rem 0.65rem;
  color: var(--ink);
  background: transparent;
  border: 1px solid var(--line);
  font-size: 0.78rem;
  font-weight: 800;
  letter-spacing: 0.08em;
}

.login-stage {
  display: grid;
  min-height: calc(100vh - 8rem);
  align-content: center;
  gap: var(--space-2xl);
  padding: clamp(2rem, 8vw, 6rem) clamp(1rem, 7vw, 8rem);
}

.login-copy { max-width: 46rem; }
.eyebrow {
  margin: 0 0 0.75rem;
  color: var(--signal-dark);
  font-size: 0.72rem;
  font-weight: 800;
  letter-spacing: 0.18em;
}

h1, h2, p { margin-top: 0; }
h1 {
  margin-bottom: var(--space-lg);
  font: 600 clamp(2.75rem, 10vw, 7.5rem)/0.92 var(--font-display);
  letter-spacing: -0.055em;
}
.login-copy > p:last-child { max-width: 31rem; color: var(--ink-soft); }

.login-form {
  display: grid;
  gap: 0.75rem;
  max-width: 30rem;
  padding-top: var(--space-lg);
  border-top: 3px solid var(--ink);
}

label { color: var(--ink-soft); font-size: 0.82rem; font-weight: 700; }
input, textarea {
  width: 100%;
  min-height: 3rem;
  margin-top: 0.35rem;
  padding: 0.75rem 0;
  color: var(--ink);
  background: transparent;
  border: 0;
  border-bottom: 1px solid var(--ink-soft);
  border-radius: 0;
}
textarea { resize: vertical; }
input::placeholder, textarea::placeholder { color: oklch(53% 0.025 150); }

button {
  min-height: 2.75rem;
  border: 0;
  cursor: pointer;
  transition: transform 120ms var(--ease-out), background-color 120ms var(--ease-out), color 120ms var(--ease-out);
}
button:active { transform: translateY(1px); }
button:disabled { cursor: wait; opacity: 0.55; }
button:focus-visible, input:focus-visible, textarea:focus-visible, summary:focus-visible {
  outline: 3px solid var(--signal);
  outline-offset: 3px;
}

.primary-button {
  padding: 0.8rem 1.1rem;
  color: var(--paper);
  background: var(--ink);
  font-weight: 750;
}
.secondary-button {
  padding: 0.75rem 1rem;
  color: var(--ink);
  background: var(--paper-deep);
  border: 1px solid var(--ink);
  font-weight: 700;
}
.text-button { padding: 0.5rem; color: var(--ink); background: transparent; text-decoration: underline; text-underline-offset: 0.25em; }
.field-note { color: var(--ink-soft); font-size: 0.75rem; }

.inventory { display: grid; }
.inventory-rail {
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: end;
  gap: var(--space-md);
  padding: var(--space-lg) clamp(1rem, 4vw, 4rem);
  color: var(--paper);
  background: var(--shelf);
}
.inventory-rail .eyebrow { grid-column: 1 / -1; color: oklch(85% 0.08 80); }
.inventory-rail p { margin-bottom: 0; }
.inventory-rail strong { display: block; font: 600 3.2rem/0.85 var(--font-display); }
.inventory-rail p span { font-size: 0.72rem; }
.asset-total { margin-top: var(--space-lg); }
.asset-total span { display: block; margin-top: 0.55rem; }
.rail-link {
  display: flex;
  grid-column: 1 / -1;
  min-height: 2.75rem;
  align-items: center;
  justify-content: space-between;
  padding: 0.65rem 0;
  color: var(--paper);
  border-top: 1px solid color-mix(in oklch, var(--paper) 35%, transparent);
  border-bottom: 1px solid color-mix(in oklch, var(--paper) 35%, transparent);
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}
.compat-stamp { color: color-mix(in oklch, var(--paper) 78%, var(--shelf)); font-size: 0.68rem; line-height: 1.35; }
.compat-stamp span { color: var(--paper); font-weight: 800; }

.inventory-main { min-width: 0; padding: clamp(1.5rem, 3vw, 3rem) clamp(1rem, 5vw, 5rem) clamp(3rem, 6vw, 6rem); }
.inventory-heading { display: flex; flex-wrap: wrap; align-items: flex-end; justify-content: space-between; gap: var(--space-lg); }
.inventory-heading h1 { margin-bottom: 0; font-size: clamp(2.8rem, 6vw, 4.8rem); }
.inventory-intro { margin: 0.6rem 0 0; color: var(--ink-soft); }
.heading-actions { display: flex; flex-wrap: wrap; gap: 0.65rem; }

.search-line {
  display: grid;
  grid-template-columns: 1fr auto;
  margin: var(--space-lg) 0 var(--space-md);
  border-bottom: 3px solid var(--ink);
}
.search-line input { margin: 0; border: 0; font-size: clamp(1rem, 3vw, 1.35rem); }
.search-line button { padding: 0 1rem; color: var(--paper); background: var(--signal-dark); font-weight: 750; }
.archive-filter {
  display: inline-flex;
  min-height: 2.75rem;
  align-items: center;
  gap: 0.65rem;
  margin: 0 0 var(--space-md);
  cursor: pointer;
}
.archive-filter input,
.check-field input {
  width: 1.15rem;
  min-height: 1.15rem;
  margin: 0;
  accent-color: var(--signal-dark);
}

.tool-section { margin-top: clamp(3.5rem, 7vw, 7rem); }
.tool-heading {
  display: flex;
  flex-wrap: wrap;
  align-items: end;
  justify-content: space-between;
  gap: var(--space-md);
  padding-bottom: var(--space-md);
  border-bottom: 1px solid var(--ink);
}
.tool-heading h2 { margin: 0; font: 600 1.6rem/1.1 var(--font-display); }
.tool-heading p:last-child { max-width: 24rem; margin: 0; color: var(--ink-soft); font-size: 0.82rem; }
.workbench { border-bottom: 1px solid var(--line); }
.workbench-section { border-bottom: 1px solid var(--line); }
.workbench-section summary {
  display: flex;
  min-height: 3.5rem;
  align-items: center;
  justify-content: space-between;
  cursor: pointer;
  font-weight: 750;
  list-style: none;
}
.workbench-section summary::-webkit-details-marker { display: none; }
.workbench-section summary span { color: var(--signal-dark); font-size: 1.35rem; }
.asset-form, .import-flow, .key-flow {
  display: grid;
  gap: var(--space-md);
  padding: var(--space-md) 0 var(--space-xl);
}
.asset-form .wide { grid-column: 1 / -1; }
.import-preview { font-size: 0.875rem; }
.preview-row { display: grid; grid-template-columns: 1fr auto; gap: 1rem; padding: 0.5rem 0; border-bottom: 1px dotted var(--line); }
.key-flow output { overflow-wrap: anywhere; color: var(--success); font-weight: 700; }
.key-list { display: grid; gap: 0.6rem; }
.key-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 0.6rem;
  border-top: 1px dotted var(--line);
}
.key-row strong,
.key-row span { display: block; }
.key-row span { color: var(--ink-soft); font-size: 0.72rem; }
.danger-button { color: var(--danger); }

.asset-section { margin-top: var(--space-lg); scroll-margin-top: var(--space-lg); }
.section-label { display: flex; align-items: baseline; justify-content: space-between; border-bottom: 1px solid var(--ink); }
.section-label .eyebrow { margin-bottom: 0.35rem; }
.section-label h2 { margin-bottom: 0.65rem; font: 600 1.7rem/1.1 var(--font-display); }
.asset-grid { display: grid; }
.asset-skeleton {
  min-height: 11rem;
  border-bottom: 1px solid var(--line);
  background:
    linear-gradient(90deg, var(--paper-deep) 0 35%, transparent 35%) 0 1.6rem / 100% 1.35rem no-repeat,
    linear-gradient(90deg, color-mix(in oklch, var(--paper-deep) 70%, transparent) 0 55%, transparent 55%) 0 4.2rem / 100% 0.75rem no-repeat,
    linear-gradient(90deg, color-mix(in oklch, var(--paper-deep) 70%, transparent) 0 72%, transparent 72%) 0 6.2rem / 100% 1.4rem no-repeat;
  animation: skeleton-pulse 1.2s ease-in-out infinite alternate;
}
.asset-card {
  container-type: inline-size;
  display: grid;
  gap: 0.85rem;
  padding: var(--space-lg) 0;
  border-bottom: 1px solid var(--line);
  animation: enter 420ms var(--ease-out) both;
  animation-delay: calc(min(var(--i), 8) * 35ms);
}
.asset-card.archived { opacity: 0.7; }
.asset-card-heading { display: grid; grid-template-columns: 1fr auto; gap: 1rem; align-items: start; }
.asset-card h3 { margin: 0; font: 600 1.45rem/1.1 var(--font-display); }
.asset-id { color: var(--signal-dark); font-size: 0.75rem; font-variant-numeric: tabular-nums; }
.asset-location { margin: 0; color: var(--ink-soft); font-size: 0.85rem; }
.asset-meta { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.asset-meta span { padding: 0.2rem 0.48rem; background: var(--paper-deep); font-size: 0.78rem; }
.asset-meta .archived-badge { color: var(--paper); background: var(--ink-soft); }
.asset-meta .status-badge { color: var(--paper); background: var(--shelf); }
.asset-actions { display: flex; flex-wrap: wrap; align-items: center; gap: 1rem; }
.asset-open-button {
  min-height: 2.75rem;
  padding: 0.35rem 0;
  color: var(--ink);
  background: transparent;
  font-weight: 750;
  text-decoration: underline;
  text-decoration-color: var(--signal-dark);
  text-underline-offset: 0.32em;
}
.asset-menu { position: relative; }
.asset-menu summary {
  min-height: 2.75rem;
  padding: 0.6rem 0;
  color: var(--ink-soft);
  cursor: pointer;
  font-size: 0.82rem;
  list-style: none;
}
.asset-menu summary::-webkit-details-marker { display: none; }
.asset-menu summary::after { content: " ···"; letter-spacing: 0.08em; }
.asset-menu[open] .archive-button {
  position: absolute;
  z-index: 3;
  top: 100%;
  left: 0;
  width: max-content;
}
.archive-button {
  min-height: 2.75rem;
  padding: 0.55rem 0.8rem;
  color: var(--paper);
  background: var(--danger);
  font-size: 0.82rem;
}

.asset-dialog {
  width: min(48rem, calc(100vw - 2rem));
  max-height: calc(100vh - 2rem);
  padding: clamp(1.25rem, 4vw, 2.5rem);
  color: var(--ink);
  background: var(--paper);
  border: 1px solid var(--ink);
  box-shadow: 0 1.5rem 5rem oklch(20% 0.03 155 / 0.3);
}
.asset-dialog::backdrop { background: oklch(20% 0.03 155 / 0.58); }
.dialog-heading {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
  padding-bottom: var(--space-md);
  border-bottom: 3px solid var(--ink);
}
.dialog-heading > .text-button { flex: 0 0 auto; white-space: nowrap; }
.dialog-heading h2 { margin-bottom: 0; font: 600 clamp(2rem, 6vw, 3.4rem)/1 var(--font-display); }
.asset-edit-form { display: grid; gap: var(--space-md); padding-top: var(--space-lg); }
.asset-edit-form .wide { grid-column: 1 / -1; }
.check-field { display: flex; min-height: 2.75rem; align-items: center; gap: 0.65rem; }
.dialog-actions { display: flex; justify-content: flex-end; gap: 0.75rem; padding-top: var(--space-md); }

.empty-state { padding: var(--space-2xl) 0; max-width: 34rem; }
.empty-state strong { display: block; margin-bottom: 0.5rem; font: 600 1.6rem var(--font-display); }
.status {
  position: fixed;
  z-index: 10;
  right: max(1rem, env(safe-area-inset-right));
  bottom: max(1rem, env(safe-area-inset-bottom));
  max-width: min(26rem, calc(100vw - 2rem));
  padding: 0.8rem 1rem;
  color: var(--paper);
  background: var(--ink);
  opacity: 0;
  pointer-events: none;
  transform: translateY(0.75rem);
  transition: opacity 180ms var(--ease-out), transform 180ms var(--ease-out);
}
.status.visible { opacity: 1; transform: translateY(0); }
.status.error { background: var(--danger); }
.sr-only { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; }

@keyframes enter { from { opacity: 0; transform: translateY(0.6rem); } }
@keyframes skeleton-pulse { from { opacity: 0.45; } to { opacity: 0.9; } }

@media (max-width: 45.99rem) {
  .inventory-main { padding-top: 1rem; }
  .heading-actions { width: 100%; }
  .heading-actions .primary-button { flex: 1 1 auto; }
  .heading-actions .secondary-button { flex: 0 0 auto; }
  .inventory-rail { padding-block: var(--space-md); }
  .asset-total { margin-top: var(--space-sm); }
  .search-line { margin-top: 1rem; }
  .asset-section { margin-top: 1rem; }
  .compat-stamp { display: none; }
}

@media (min-width: 46rem) {
  .masthead-note { display: block; }
  .login-stage { grid-template-columns: minmax(0, 1.6fr) minmax(18rem, 0.7fr); align-items: end; }
  .inventory-rail { grid-template-columns: 1fr auto auto; align-items: center; padding: var(--space-md) var(--space-xl); }
  .inventory-rail > div { display: flex; align-items: center; gap: var(--space-md); }
  .inventory-rail .eyebrow { margin: 0; }
  .inventory-rail .asset-total { display: flex; align-items: baseline; gap: var(--space-sm); margin: 0; }
  .inventory-rail .asset-total span { margin: 0; }
  .rail-link { grid-column: auto; min-width: 10rem; padding-inline: var(--space-md); }
  .asset-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .asset-edit-form { grid-template-columns: repeat(2, minmax(0, 1fr)); }
  .asset-form .primary-button { align-self: end; }
  .asset-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); column-gap: clamp(1.5rem, 5vw, 4rem); }
}

@media (min-width: 64rem) {
  .inventory { grid-template-columns: 10rem minmax(0, 1fr); }
  .inventory-rail {
    position: sticky;
    top: 0;
    min-height: 100vh;
    align-content: space-between;
    grid-template-columns: 1fr;
    padding: var(--space-xl) 1.25rem;
  }
  .inventory-rail > div { display: block; }
  .inventory-rail .eyebrow { margin-bottom: 0.75rem; }
  .inventory-rail .asset-total { display: block; margin-top: var(--space-lg); }
  .inventory-rail .asset-total span { margin-top: 0.55rem; }
  .compat-stamp { align-self: end; }
  .workbench { display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); border-bottom: 1px solid var(--line); }
  .workbench-section { padding-right: var(--space-lg); border-right: 1px solid var(--line); border-bottom: 0; }
  .workbench-section + .workbench-section { padding-left: var(--space-lg); }
  .workbench-section:last-child { border-right: 0; }
}

@media (hover: hover) {
  .primary-button:hover { background: var(--signal-dark); }
  .secondary-button:hover { color: var(--paper); background: var(--ink); }
  .asset-card:hover h3 { color: var(--signal-dark); }
  .asset-open-button:hover { color: var(--signal-dark); }
}

@media (pointer: coarse) {
  button, summary { min-height: 3rem; }
}

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