/* =========================================================
   Inventory — Design tokens + base styles
   Concept: clean / modern / tech asset-tracking tool
   Fonts: Cabinet Grotesk (display) + Satoshi (body) — Fontshare
   ========================================================= */

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html {
  -webkit-text-size-adjust: none;
  text-size-adjust: none;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
  scroll-behavior: smooth;
}
body { min-height: 100dvh; line-height: 1.55; font-family: var(--font-body); font-size: var(--text-base); color: var(--color-text); background-color: var(--color-bg); }
img, svg { display: block; max-width: 100%; }
ul[role="list"], ol[role="list"] { list-style: none; }
input, button, textarea, select { font: inherit; color: inherit; }
h1, h2, h3, h4 { text-wrap: balance; line-height: 1.2; font-family: var(--font-display); }
p, li { text-wrap: pretty; }
:focus-visible { outline: 2px solid var(--color-primary); outline-offset: 2px; border-radius: var(--radius-sm); }
button { cursor: pointer; background: none; border: none; }
table { border-collapse: collapse; width: 100%; }
a { color: inherit; text-decoration: none; }
a, button, [role="button"], input, textarea, select {
  transition: color var(--transition), background var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.sr-only { position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0,0,0,0); white-space: nowrap; border-width: 0; }

/* ---------- Tokens ---------- */
:root, [data-theme="light"] {
  --color-bg: #f4f6f8;
  --color-surface: #ffffff;
  --color-surface-2: #fbfcfd;
  --color-surface-offset: #eceff2;
  --color-divider: #e2e6eb;
  --color-border: #d7dce2;

  --color-text: #171b21;
  --color-text-muted: #5c6572;
  --color-text-faint: #98a1ab;
  --color-text-inverse: #f7f9fb;

  --color-primary: #2f5df0;
  --color-primary-hover: #2447c2;
  --color-primary-active: #1c379a;
  --color-primary-highlight: #dee6fd;

  --color-success: #1c8a4c;
  --color-success-hover: #146c3b;
  --color-success-highlight: #d9f0e2;

  --color-warning: #b5650a;
  --color-warning-hover: #8f4f08;
  --color-warning-highlight: #f6e3ca;

  --color-error: #c22c3b;
  --color-error-hover: #9c212d;
  --color-error-highlight: #f7dade;

  --radius-sm: 0.375rem;
  --radius-md: 0.625rem;
  --radius-lg: 0.875rem;
  --radius-full: 9999px;

  --transition: 160ms cubic-bezier(0.16, 1, 0.3, 1);

  --shadow-sm: 0 1px 2px rgba(20, 25, 35, 0.06);
  --shadow-md: 0 6px 16px rgba(20, 25, 35, 0.08);
  --shadow-lg: 0 16px 40px rgba(20, 25, 35, 0.14);

  --font-display: 'Cabinet Grotesk', 'Segoe UI', sans-serif;
  --font-body: 'Satoshi', 'Segoe UI', sans-serif;
  --font-mono: 'JetBrains Mono', 'Consolas', monospace;

  --text-xs: clamp(0.75rem, 0.72rem + 0.15vw, 0.8125rem);
  --text-sm: clamp(0.875rem, 0.84rem + 0.2vw, 0.9375rem);
  --text-base: clamp(1rem, 0.96rem + 0.2vw, 1.0625rem);
  --text-lg: clamp(1.125rem, 1.05rem + 0.4vw, 1.375rem);
  --text-xl: clamp(1.375rem, 1.2rem + 0.9vw, 1.875rem);

  --space-1: 0.25rem; --space-2: 0.5rem; --space-3: 0.75rem; --space-4: 1rem;
  --space-5: 1.25rem; --space-6: 1.5rem; --space-8: 2rem; --space-10: 2.5rem;
  --space-12: 3rem; --space-16: 4rem;

  --content-default: 1180px;
}

[data-theme="dark"] {
  --color-bg: #10131a;
  --color-surface: #171b23;
  --color-surface-2: #1c212b;
  --color-surface-offset: #1f2531;
  --color-divider: #2a313e;
  --color-border: #333c4a;

  --color-text: #e7eaef;
  --color-text-muted: #99a2b1;
  --color-text-faint: #616b7a;
  --color-text-inverse: #10131a;

  --color-primary: #5b82ff;
  --color-primary-hover: #7b9aff;
  --color-primary-active: #99b1ff;
  --color-primary-highlight: #22305c;

  --color-success: #3fbf78;
  --color-success-hover: #5fd390;
  --color-success-highlight: #17362a;

  --color-warning: #e08a2c;
  --color-warning-hover: #eda048;
  --color-warning-highlight: #3d2c15;

  --color-error: #e75b6a;
  --color-error-hover: #ee7d89;
  --color-error-highlight: #3c1c22;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.4);
  --shadow-md: 0 6px 16px rgba(0,0,0,0.45);
  --shadow-lg: 0 16px 40px rgba(0,0,0,0.55);
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ---------- Layout shell ---------- */
.app-shell { min-height: 100dvh; display: flex; flex-direction: column; }

.topbar {
  position: sticky; top: 0; z-index: 40;
  display: flex; align-items: center; justify-content: space-between;
  gap: var(--space-4);
  padding: var(--space-3) var(--space-6);
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
}
.topbar__brand { display: flex; align-items: center; gap: var(--space-2); font-family: var(--font-display); font-size: var(--text-lg); font-weight: 600; }
.topbar__brand svg { color: var(--color-primary); }
.topbar__nav { display: flex; align-items: center; gap: var(--space-1); flex-wrap: wrap; }
.topbar__nav a {
  font-size: var(--text-sm); font-weight: 500; color: var(--color-text-muted);
  padding: var(--space-2) var(--space-3); border-radius: var(--radius-md);
}
.topbar__nav a:hover { color: var(--color-text); background: var(--color-surface-offset); }
.topbar__nav a.active { color: var(--color-primary); background: var(--color-primary-highlight); }
.topbar__actions { display: flex; align-items: center; gap: var(--space-2); }

.icon-btn {
  display: inline-flex; align-items: center; justify-content: center;
  width: 2.25rem; height: 2.25rem; border-radius: var(--radius-md);
  color: var(--color-text-muted); background: var(--color-surface-offset);
}
.icon-btn:hover { color: var(--color-text); background: var(--color-border); }

main.page { flex: 1; width: 100%; max-width: var(--content-default); margin-inline: auto; padding: var(--space-8) var(--space-6) var(--space-16); }

.page-head { display: flex; align-items: flex-end; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-6); }
.page-head h1 { font-size: var(--text-xl); font-weight: 700; }
.page-head p { color: var(--color-text-muted); font-size: var(--text-sm); margin-top: var(--space-1); }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: var(--space-2);
  font-size: var(--text-sm); font-weight: 600; line-height: 1;
  padding: 0.65rem var(--space-4); border-radius: var(--radius-md);
  border: 1px solid transparent; white-space: nowrap;
}
.btn-primary { background: var(--color-primary); color: #fff; }
.btn-primary:hover { background: var(--color-primary-hover); }
.btn-secondary { background: var(--color-surface); color: var(--color-text); border-color: var(--color-border); }
.btn-secondary:hover { background: var(--color-surface-offset); }
.btn-ghost { background: transparent; color: var(--color-text-muted); }
.btn-ghost:hover { color: var(--color-text); background: var(--color-surface-offset); }
.btn-danger { background: var(--color-error); color: #fff; }
.btn-danger:hover { background: var(--color-error-hover); }
.btn-success { background: var(--color-success); color: #fff; }
.btn-success:hover { background: var(--color-success-hover); }
.btn-sm { padding: 0.4rem 0.75rem; font-size: var(--text-xs); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }
.btn-block { width: 100%; }

/* ---------- Cards / surfaces ---------- */
.card { background: var(--color-surface); border: 1px solid var(--color-divider); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.card-pad { padding: var(--space-6); }

.stat-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(180px, 1fr)); gap: var(--space-4); margin-bottom: var(--space-6); }
.stat-card { padding: var(--space-5); }
.stat-card__label { font-size: var(--text-xs); color: var(--color-text-muted); font-weight: 600; text-transform: uppercase; letter-spacing: 0.04em; }
.stat-card__value { font-family: var(--font-display); font-size: var(--text-xl); font-weight: 700; margin-top: var(--space-1); }
.stat-card--accent .stat-card__value { color: var(--color-primary); }
.stat-card--warn .stat-card__value { color: var(--color-warning); }

/* ---------- Scan / jump box ---------- */
.scan-box {
  display: flex; align-items: center; gap: var(--space-3);
  padding: var(--space-4) var(--space-5); margin-bottom: var(--space-6);
  border: 1.5px dashed var(--color-primary);
  background: var(--color-primary-highlight);
}
.scan-box svg { color: var(--color-primary); flex-shrink: 0; }
.scan-box__text { flex: 1; min-width: 200px; }
.scan-box__text label { display: block; font-size: var(--text-xs); font-weight: 600; color: var(--color-primary); text-transform: uppercase; letter-spacing: 0.03em; margin-bottom: var(--space-1); }
.scan-box input {
  width: 100%; border: none; background: var(--color-surface); border-radius: var(--radius-md);
  padding: var(--space-3) var(--space-4); font-size: var(--text-base); font-family: var(--font-mono);
  border: 1px solid var(--color-border);
}
.scan-box input:focus-visible { outline-offset: 0; }
.scan-feedback { font-size: var(--text-xs); margin-top: var(--space-1); min-height: 1.2em; }
.scan-feedback.error { color: var(--color-error); }
.scan-feedback.success { color: var(--color-success); }

/* ---------- Filters / toolbar ---------- */
.toolbar { display: flex; align-items: center; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-4); }
.toolbar__left { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; flex: 1; }
.search-input { position: relative; flex: 1; min-width: 220px; max-width: 360px; }
.search-input input { width: 100%; padding: 0.6rem var(--space-3) 0.6rem 2.25rem; border: 1px solid var(--color-border); border-radius: var(--radius-md); background: var(--color-surface); font-size: var(--text-sm); }
.search-input svg { position: absolute; left: var(--space-3); top: 50%; transform: translateY(-50%); color: var(--color-text-faint); width: 16px; height: 16px; }

.chip-group { display: flex; gap: var(--space-2); flex-wrap: wrap; }
.chip {
  font-size: var(--text-xs); font-weight: 600; padding: 0.4rem 0.75rem; border-radius: var(--radius-full);
  border: 1px solid var(--color-border); color: var(--color-text-muted); background: var(--color-surface);
}
.chip.active { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* ---------- Table ---------- */
.table-wrap { overflow-x: auto; border: 1px solid var(--color-divider); border-radius: var(--radius-lg); background: var(--color-surface); }
table.data-table { min-width: 720px; }
table.data-table th, table.data-table td { padding: var(--space-3) var(--space-4); text-align: left; font-size: var(--text-sm); border-bottom: 1px solid var(--color-divider); }
table.data-table th { font-size: var(--text-xs); text-transform: uppercase; letter-spacing: 0.03em; color: var(--color-text-muted); background: var(--color-surface-2); font-weight: 600; }
table.data-table tbody tr { cursor: pointer; }
table.data-table tbody tr:hover { background: var(--color-surface-offset); }
table.data-table tbody tr:last-child td { border-bottom: none; }
.tag-cell { font-family: var(--font-mono); font-size: var(--text-xs); color: var(--color-text-muted); }
.name-cell strong { display: block; }
.name-cell span { font-size: var(--text-xs); color: var(--color-text-muted); }

/* ---------- Badges ---------- */
.badge { display: inline-flex; align-items: center; gap: var(--space-1); font-size: var(--text-xs); font-weight: 600; padding: 0.25rem 0.6rem; border-radius: var(--radius-full); }
.badge::before { content: ''; width: 6px; height: 6px; border-radius: 50%; background: currentColor; }
.badge-available { color: var(--color-success); background: var(--color-success-highlight); }
.badge-signedout { color: var(--color-warning); background: var(--color-warning-highlight); }
.badge-pack { color: var(--color-primary); background: var(--color-primary-highlight); }
.badge-item { color: var(--color-text-muted); background: var(--color-surface-offset); }

/* ---------- Forms ---------- */
.form-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: var(--space-5); }
.field { display: flex; flex-direction: column; gap: var(--space-2); }
.field.full { grid-column: 1 / -1; }
.field label { font-size: var(--text-sm); font-weight: 600; }
.field .hint { font-size: var(--text-xs); color: var(--color-text-muted); }
.field input, .field select, .field textarea {
  border: 1px solid var(--color-border); border-radius: var(--radius-md); padding: 0.6rem var(--space-3);
  background: var(--color-surface); font-size: var(--text-base);
}
.field input:focus-visible, .field select:focus-visible, .field textarea:focus-visible { outline-offset: 0; }
.form-actions { display: flex; gap: var(--space-3); margin-top: var(--space-6); flex-wrap: wrap; }

/* ---------- Auth screen ---------- */
.auth-screen { min-height: 100dvh; display: flex; align-items: center; justify-content: center; padding: var(--space-6); }
.auth-card { width: 100%; max-width: 400px; padding: var(--space-8); }
.auth-card__logo { display: flex; align-items: center; gap: var(--space-2); justify-content: center; margin-bottom: var(--space-6); font-family: var(--font-display); font-size: var(--text-lg); font-weight: 700; }
.auth-card h1 { font-size: var(--text-lg); text-align: center; margin-bottom: var(--space-1); }
.auth-card p.sub { text-align: center; color: var(--color-text-muted); font-size: var(--text-sm); margin-bottom: var(--space-6); }
.auth-tabs { display: flex; gap: var(--space-1); margin-bottom: var(--space-6); background: var(--color-surface-offset); border-radius: var(--radius-md); padding: 0.25rem; }
.auth-tabs button { flex: 1; padding: var(--space-2); border-radius: var(--radius-sm); font-size: var(--text-sm); font-weight: 600; color: var(--color-text-muted); }
.auth-tabs button.active { background: var(--color-surface); color: var(--color-text); box-shadow: var(--shadow-sm); }
.auth-error { font-size: var(--text-sm); color: var(--color-error); background: var(--color-error-highlight); padding: var(--space-3); border-radius: var(--radius-md); margin-top: var(--space-4); display: none; }
.auth-error.show { display: block; }

/* ---------- Batch list (sign out / pack builder) ---------- */
.batch-list { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-4); }
.batch-row { display: flex; align-items: center; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-divider); border-radius: var(--radius-md); background: var(--color-surface-2); }
.batch-row__info { flex: 1; }
.batch-row__info strong { display: block; font-size: var(--text-sm); }
.batch-row__info span { font-size: var(--text-xs); color: var(--color-text-muted); }
.batch-row__remove { color: var(--color-text-faint); }
.batch-row__remove:hover { color: var(--color-error); }
.empty-note { color: var(--color-text-faint); font-size: var(--text-sm); text-align: center; padding: var(--space-6); }

/* ---------- Item detail ---------- */
.item-header { display: flex; align-items: flex-start; justify-content: space-between; gap: var(--space-4); flex-wrap: wrap; margin-bottom: var(--space-6); }
.item-header__title { display: flex; align-items: center; gap: var(--space-3); flex-wrap: wrap; }
.item-header__title h1 { font-size: var(--text-xl); }
.detail-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: var(--space-5); margin-top: var(--space-5); }
.detail-field .label { font-size: var(--text-xs); color: var(--color-text-muted); text-transform: uppercase; letter-spacing: 0.03em; font-weight: 600; }
.detail-field .value { font-size: var(--text-base); font-weight: 600; margin-top: 0.2rem; }
.member-list { display: flex; flex-direction: column; gap: var(--space-2); margin-top: var(--space-4); }
.member-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-3) var(--space-4); border: 1px solid var(--color-divider); border-radius: var(--radius-md); }
.member-row:hover { background: var(--color-surface-offset); }
.section-title { font-size: var(--text-base); font-weight: 700; margin-bottom: var(--space-3); }
.log-row { display: flex; align-items: center; justify-content: space-between; gap: var(--space-3); padding: var(--space-2) 0; border-bottom: 1px solid var(--color-divider); font-size: var(--text-sm); }
.log-row:last-child { border-bottom: none; }
.log-row span.muted { color: var(--color-text-muted); font-size: var(--text-xs); }

/* ---------- Toast ---------- */
.toast-stack { position: fixed; bottom: var(--space-6); right: var(--space-6); display: flex; flex-direction: column; gap: var(--space-2); z-index: 100; }
.toast { padding: var(--space-3) var(--space-4); border-radius: var(--radius-md); background: var(--color-text); color: var(--color-text-inverse); font-size: var(--text-sm); box-shadow: var(--shadow-lg); max-width: 320px; }
.toast.error { background: var(--color-error); color: #fff; }
.toast.success { background: var(--color-success); color: #fff; }

/* ---------- Loading / empty states ---------- */
.spinner { width: 20px; height: 20px; border: 2.5px solid var(--color-border); border-top-color: var(--color-primary); border-radius: 50%; animation: spin 0.7s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }
.loading-row { display: flex; align-items: center; justify-content: center; gap: var(--space-3); padding: var(--space-12); color: var(--color-text-muted); }
.config-banner { background: var(--color-warning-highlight); color: var(--color-warning); border: 1px solid var(--color-warning); border-radius: var(--radius-md); padding: var(--space-4); font-size: var(--text-sm); margin-bottom: var(--space-6); }
.config-banner code { font-family: var(--font-mono); background: rgba(0,0,0,0.06); padding: 0.1rem 0.3rem; border-radius: 0.25rem; }

.nav-toggle { display: none; }

@media (max-width: 780px) {
  main.page { padding: var(--space-6) var(--space-4) var(--space-12); }
  .topbar { padding: var(--space-3) var(--space-4); flex-wrap: wrap; }
  .nav-toggle { display: inline-flex; }
  .topbar__nav {
    display: none; order: 3; width: 100%; flex-direction: column; align-items: stretch;
    padding-top: var(--space-3); border-top: 1px solid var(--color-divider); margin-top: var(--space-3);
  }
  .topbar__nav.open { display: flex; }
  .topbar__nav a { text-align: left; }
}