/* ------------------------------------------------------------------
   Material 3 — solid colour system, no gradients, no external assets.
   Colour roles follow the M3 spec: primary / container / surface tiers.
   ------------------------------------------------------------------ */

:root {
  /* Primary palette (M3 baseline violet) */
  --md-primary: #6750a4;
  --md-on-primary: #ffffff;
  --md-primary-container: #eaddff;
  --md-on-primary-container: #21005d;

  /* Secondary */
  --md-secondary: #625b71;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #e8def8;
  --md-on-secondary-container: #1d192b;

  /* Tertiary */
  --md-tertiary: #7d5260;
  --md-on-tertiary: #ffffff;
  --md-tertiary-container: #ffd8e4;
  --md-on-tertiary-container: #31111d;

  /* Error */
  --md-error: #b3261e;
  --md-on-error: #ffffff;
  --md-error-container: #f9dedc;
  --md-on-error-container: #410e0b;

  /* Success (M3-style custom role) */
  --md-success: #2e6a4f;
  --md-on-success: #ffffff;
  --md-success-container: #b8f2d4;
  --md-on-success-container: #002114;

  /* Surfaces */
  --md-surface: #fef7ff;
  --md-on-surface: #1d1b20;
  --md-surface-variant: #e7e0ec;
  --md-on-surface-variant: #49454f;

  --md-surface-container-lowest: #ffffff;
  --md-surface-container-low: #f7f2fa;
  --md-surface-container: #f3edf7;
  --md-surface-container-high: #ece6f0;
  --md-surface-container-highest: #e6e0e9;

  --md-outline: #79747e;
  --md-outline-variant: #cac4d0;
  --md-scrim: rgba(0, 0, 0, 0.42);
  --md-inverse-surface: #322f35;
  --md-inverse-on-surface: #f5eff7;

  /* Shape scale */
  --md-corner-xs: 4px;
  --md-corner-s: 8px;
  --md-corner-m: 12px;
  --md-corner-l: 16px;
  --md-corner-xl: 28px;
  --md-corner-full: 999px;

  /* Elevation (M3 tonal shadows) */
  --md-elev-1: 0 1px 2px rgba(0,0,0,.30), 0 1px 3px 1px rgba(0,0,0,.15);
  --md-elev-2: 0 1px 2px rgba(0,0,0,.30), 0 2px 6px 2px rgba(0,0,0,.15);
  --md-elev-3: 0 4px 8px 3px rgba(0,0,0,.15), 0 1px 3px rgba(0,0,0,.30);

  --md-motion: 200ms cubic-bezier(0.2, 0, 0, 1);

  --font-sans: "Roboto", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "Roboto Mono", ui-monospace, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-primary: #d0bcff;
    --md-on-primary: #381e72;
    --md-primary-container: #4f378b;
    --md-on-primary-container: #eaddff;

    --md-secondary: #ccc2dc;
    --md-on-secondary: #332d41;
    --md-secondary-container: #4a4458;
    --md-on-secondary-container: #e8def8;

    --md-tertiary: #efb8c8;
    --md-on-tertiary: #492532;
    --md-tertiary-container: #633b48;
    --md-on-tertiary-container: #ffd8e4;

    --md-error: #f2b8b5;
    --md-on-error: #601410;
    --md-error-container: #8c1d18;
    --md-on-error-container: #f9dedc;

    --md-success: #9ed6b6;
    --md-on-success: #003825;
    --md-success-container: #1f5138;
    --md-on-success-container: #b8f2d4;

    --md-surface: #141218;
    --md-on-surface: #e6e0e9;
    --md-surface-variant: #49454f;
    --md-on-surface-variant: #cac4d0;

    --md-surface-container-lowest: #0f0d13;
    --md-surface-container-low: #1d1b20;
    --md-surface-container: #211f26;
    --md-surface-container-high: #2b2930;
    --md-surface-container-highest: #36343b;

    --md-outline: #938f99;
    --md-outline-variant: #49454f;
    --md-inverse-surface: #e6e0e9;
    --md-inverse-on-surface: #322f35;
  }
}

/* ---------------------------------- base --------------------------- */

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

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

body {
  margin: 0;
  font-family: var(--font-sans);
  background: var(--md-surface);
  color: var(--md-on-surface);
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a { color: var(--md-primary); text-decoration: none; }
a:hover { text-decoration: underline; }

:focus-visible {
  outline: 3px solid var(--md-primary);
  outline-offset: 2px;
  border-radius: var(--md-corner-xs);
}

/* Icon base size. Every icon carries .ic so a new usage can never fall back
   to the browser default for a viewBox-only <svg> (width:auto -> 100%,
   height:150px), which previously produced enormous icons. Context rules
   below are more specific and still win. */
.ic {
  width: 20px;
  height: 20px;
  fill: currentColor;
  flex-shrink: 0;
  vertical-align: middle;
}

/* The sprite itself must never occupy layout space. */
.icon-sprite {
  display: none !important;
}

/* M3 type scale */
.display-s { font-size: 2.25rem; line-height: 2.75rem; font-weight: 400; letter-spacing: 0; }
.headline-m { font-size: 1.75rem; line-height: 2.25rem; font-weight: 400; }
.headline-s { font-size: 1.5rem; line-height: 2rem; font-weight: 400; }
.title-l { font-size: 1.375rem; line-height: 1.75rem; font-weight: 400; }
.title-m { font-size: 1rem; line-height: 1.5rem; font-weight: 500; letter-spacing: .009375em; }
.body-l { font-size: 1rem; line-height: 1.5rem; }
.body-m { font-size: .875rem; line-height: 1.25rem; letter-spacing: .015625em; }
.label-l { font-size: .875rem; line-height: 1.25rem; font-weight: 500; letter-spacing: .00625em; }
.label-m { font-size: .75rem; line-height: 1rem; font-weight: 500; letter-spacing: .03125em; }
.muted { color: var(--md-on-surface-variant); }
.mono { font-family: var(--font-mono); }

/* --------------------------------- layout -------------------------- */

.top-app-bar {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 24px;
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  min-height: 64px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.top-app-bar .brand {
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: 1.375rem;
  color: var(--md-on-surface);
  text-decoration: none;
  font-weight: 500;
}
.top-app-bar .brand:hover { text-decoration: none; }

.brand-mark {
  width: 40px; height: 40px;
  border-radius: var(--md-corner-m);
  background: var(--md-primary);
  color: var(--md-on-primary);
  display: grid;
  place-items: center;
  flex-shrink: 0;
}
.brand-mark svg { width: 24px; height: 24px; fill: currentColor; }

.spacer { flex: 1 1 auto; }

main {
  flex: 1 1 auto;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 24px;
}

footer {
  padding: 24px;
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: .75rem;
}

/* --------------------------------- cards --------------------------- */

.card {
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-l);
  padding: 24px;
  margin-bottom: 24px;
}
.card.outlined {
  background: var(--md-surface);
  border: 1px solid var(--md-outline-variant);
}
.card.elevated { box-shadow: var(--md-elev-1); background: var(--md-surface-container-low); }
.card-header { display: flex; align-items: center; gap: 12px; margin-bottom: 16px; flex-wrap: wrap; }
.card-header h2, .card-header h1 { margin: 0; }

/* -------------------------------- buttons -------------------------- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 24px;
  border: none;
  border-radius: var(--md-corner-full);
  font-family: inherit;
  font-size: .875rem;
  font-weight: 500;
  letter-spacing: .00625em;
  cursor: pointer;
  transition: box-shadow var(--md-motion), filter var(--md-motion);
  background: var(--md-primary);
  color: var(--md-on-primary);
  text-decoration: none;
  white-space: nowrap;
}
.btn:hover { box-shadow: var(--md-elev-1); filter: brightness(1.08); text-decoration: none; }
.btn:active { box-shadow: none; filter: brightness(.95); }
.btn:disabled { opacity: .38; cursor: not-allowed; box-shadow: none; filter: none; }

.btn.tonal { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }
.btn.outlined {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}
.btn.text { background: transparent; color: var(--md-primary); padding: 0 12px; }
.btn.danger { background: var(--md-error); color: var(--md-on-error); }
.btn.small { height: 32px; padding: 0 16px; font-size: .75rem; }
.btn.full { width: 100%; }
.btn svg { width: 18px; height: 18px; fill: currentColor; flex-shrink: 0; }

.icon-btn {
  width: 40px; height: 40px;
  border-radius: var(--md-corner-full);
  border: none;
  background: transparent;
  color: var(--md-on-surface-variant);
  display: grid; place-items: center;
  cursor: pointer;
  transition: background var(--md-motion);
}
.icon-btn:hover { background: var(--md-surface-container-highest); }
.icon-btn svg { width: 20px; height: 20px; fill: currentColor; }

/* --------------------------- text fields (M3) ---------------------- */

.field { position: relative; margin-bottom: 20px; }
.field label {
  display: block;
  font-size: .75rem;
  font-weight: 500;
  letter-spacing: .03125em;
  color: var(--md-on-surface-variant);
  margin-bottom: 6px;
}
.field input[type="text"],
.field input[type="password"],
.field input[type="number"],
.field input[type="datetime-local"],
.field input[type="file"],
.field select,
.field textarea {
  width: 100%;
  padding: 12px 16px;
  font-family: inherit;
  font-size: 1rem;
  color: var(--md-on-surface);
  background: var(--md-surface-container-highest);
  border: 1px solid var(--md-outline);
  border-radius: var(--md-corner-s);
  transition: border-color var(--md-motion);
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: none;
  border-color: var(--md-primary);
  border-width: 2px;
  padding: 11px 15px;
}
.field .hint { font-size: .75rem; color: var(--md-on-surface-variant); margin-top: 6px; }

.field input[type="file"] {
  padding: 10px;
  cursor: pointer;
  background: var(--md-surface-container);
  border-style: dashed;
}

/* Large centred code entry for the 2FA screen */
.code-input {
  font-family: var(--font-mono);
  font-size: 1.75rem !important;
  letter-spacing: .5em;
  text-align: center;
  padding-left: .5em !important;
}

.switch-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 12px 0;
}
.switch-row .switch-label { font-size: .875rem; }

/* M3 switch */
.switch { position: relative; display: inline-block; width: 52px; height: 32px; flex-shrink: 0; }
.switch input { opacity: 0; width: 0; height: 0; }
.switch .track {
  position: absolute; inset: 0;
  background: var(--md-surface-container-highest);
  border: 2px solid var(--md-outline);
  border-radius: var(--md-corner-full);
  cursor: pointer;
  transition: background var(--md-motion), border-color var(--md-motion);
}
.switch .track::before {
  content: "";
  position: absolute;
  width: 16px; height: 16px;
  left: 6px; top: 50%;
  transform: translateY(-50%);
  background: var(--md-outline);
  border-radius: 50%;
  transition: all var(--md-motion);
}
.switch input:checked + .track { background: var(--md-primary); border-color: var(--md-primary); }
.switch input:checked + .track::before {
  width: 24px; height: 24px;
  left: 24px;
  background: var(--md-on-primary);
}
.switch input:focus-visible + .track { outline: 3px solid var(--md-primary); outline-offset: 2px; }

/* --------------------------------- lists --------------------------- */

.list { display: flex; flex-direction: column; gap: 2px; }

.list-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 12px 16px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-m);
  transition: background var(--md-motion);
  min-height: 64px;
}
.list-item:hover { background: var(--md-surface-container-high); }
.list-item .leading {
  width: 40px; height: 40px;
  border-radius: var(--md-corner-s);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  display: grid; place-items: center;
  flex-shrink: 0;
}
.list-item .leading svg { width: 22px; height: 22px; fill: currentColor; }
.list-item .content { flex: 1 1 auto; min-width: 0; }
.list-item .content .primary {
  display: block;
  font-size: 1rem;
  color: var(--md-on-surface);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .content .secondary {
  display: block;
  font-size: .875rem;
  color: var(--md-on-surface-variant);
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}
.list-item .trailing { display: flex; align-items: center; gap: 4px; flex-shrink: 0; }

/* --------------------------------- chips --------------------------- */

.chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  height: 24px;
  padding: 0 10px;
  border-radius: var(--md-corner-s);
  font-size: .6875rem;
  font-weight: 500;
  letter-spacing: .03125em;
  background: var(--md-surface-container-highest);
  color: var(--md-on-surface-variant);
  white-space: nowrap;
}
.chip .ic, .chip svg { width: 14px; height: 14px; }
.chip.primary { background: var(--md-primary-container); color: var(--md-on-primary-container); }
.chip.tertiary { background: var(--md-tertiary-container); color: var(--md-on-tertiary-container); }
.chip.success { background: var(--md-success-container); color: var(--md-on-success-container); }
.chip.error { background: var(--md-error-container); color: var(--md-on-error-container); }

/* ------------------------------- banners --------------------------- */

.banner {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 16px;
  border-radius: var(--md-corner-m);
  margin-bottom: 24px;
  font-size: .875rem;
}
.banner svg { width: 20px; height: 20px; fill: currentColor; flex-shrink: 0; margin-top: 2px; }
.banner.error { background: var(--md-error-container); color: var(--md-on-error-container); }
.banner.success { background: var(--md-success-container); color: var(--md-on-success-container); }
.banner.info { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }

/* ------------------------------ auth pages ------------------------- */

/* main is flex:1 in a column-flex body, so it already fills the space left
   by the header and footer. Centering here avoids the old 100vh block that
   overflowed the viewport and pushed auth cards far down the page. */
.main-center {
  display: grid;
  place-items: center;
}

.auth-wrap {
  width: 100%;
  display: grid;
  place-items: center;
  padding: 8px 0 32px;
}
.auth-card {
  width: 100%;
  max-width: 420px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-xl);
  padding: 32px;
  box-shadow: var(--md-elev-2);
}
.auth-card .auth-head { text-align: center; margin-bottom: 28px; }
.auth-card .auth-head .brand-mark {
  width: 56px; height: 56px;
  margin: 0 auto 16px;
  border-radius: var(--md-corner-l);
}
.auth-card .auth-head .brand-mark svg { width: 32px; height: 32px; }
.auth-card h1 { margin: 0 0 4px; font-size: 1.5rem; font-weight: 400; }

/* ------------------------------ share page ------------------------- */

.share-hero {
  text-align: center;
  padding: 32px 24px;
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-xl);
  margin-bottom: 16px;
}
.share-hero .file-icon {
  width: 88px; height: 88px;
  margin: 0 auto 20px;
  border-radius: var(--md-corner-l);
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  display: grid; place-items: center;
}
.share-hero .file-icon svg { width: 44px; height: 44px; fill: currentColor; }
.share-hero h1 {
  margin: 0 0 8px;
  font-size: 1.5rem;
  font-weight: 400;
  word-break: break-word;
}
.share-meta {
  display: flex; justify-content: center; gap: 8px;
  flex-wrap: wrap; margin: 16px 0 24px;
}

/* -------------------------------- grid ----------------------------- */

.grid { display: grid; gap: 16px; }
.grid.cols-2 { grid-template-columns: repeat(auto-fit, minmax(260px, 1fr)); }
.grid.cols-3 { grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); }
.grid.cols-4 { grid-template-columns: repeat(auto-fit, minmax(170px, 1fr)); }

.stats-row { margin-bottom: 24px; }

.stat {
  background: var(--md-surface-container-low);
  border-radius: var(--md-corner-m);
  padding: 20px;
  min-width: 0;
}
.stat .value {
  font-size: 1.75rem;
  font-weight: 400;
  color: var(--md-primary);
  line-height: 1.2;
  overflow-wrap: anywhere;
}
.stat .label { font-size: .75rem; color: var(--md-on-surface-variant); }

/* ------------------------------ empty state ------------------------ */

.empty { text-align: center; padding: 48px 24px; color: var(--md-on-surface-variant); }
.empty svg { width: 56px; height: 56px; fill: var(--md-outline-variant); margin-bottom: 16px; }
.empty p { margin: 4px 0; }

/* ------------------------------ breadcrumb ------------------------- */

.breadcrumb {
  display: flex; align-items: center; gap: 4px;
  flex-wrap: wrap; margin-bottom: 16px;
  font-size: .875rem;
}
.breadcrumb .sep { color: var(--md-outline); }
.breadcrumb a {
  color: var(--md-primary);
  display: inline-flex;
  align-items: center;
  gap: 4px;
}
.breadcrumb .ic, .breadcrumb svg { width: 18px; height: 18px; }
.breadcrumb .current { color: var(--md-on-surface-variant); }

/* --------------------------- copy link field ----------------------- */

.copy-row { display: flex; gap: 8px; align-items: stretch; }
.copy-row input {
  flex: 1 1 auto;
  font-family: var(--font-mono);
  font-size: .8125rem;
  padding: 10px 12px;
  border: 1px solid var(--md-outline);
  border-radius: var(--md-corner-s);
  background: var(--md-surface-container-highest);
  color: var(--md-on-surface);
  min-width: 0;
}

/* ------------------------------- QR code --------------------------- */

.qr-box {
  display: grid;
  place-items: center;
  padding: 16px;
  background: #ffffff;
  border-radius: var(--md-corner-m);
  margin: 0 auto 16px;
  width: fit-content;
}
.qr-box img { display: block; width: 200px; height: 200px; image-rendering: pixelated; }

.secret-box {
  font-family: var(--font-mono);
  font-size: .875rem;
  word-break: break-all;
  background: var(--md-surface-container-highest);
  padding: 12px;
  border-radius: var(--md-corner-s);
  text-align: center;
  letter-spacing: .05em;
}

/* ------------------------------- tables ---------------------------- */

.audit-list { display: flex; flex-direction: column; gap: 1px; }
.audit-row {
  display: flex; align-items: center; gap: 12px;
  padding: 8px 12px;
  border-radius: var(--md-corner-s);
  font-size: .8125rem;
  background: var(--md-surface-container-low);
}
.audit-row .dot { width: 8px; height: 8px; border-radius: 50%; flex-shrink: 0; }
.audit-row .dot.ok { background: var(--md-success); }
.audit-row .dot.fail { background: var(--md-error); }
.audit-row .ev { font-weight: 500; min-width: 130px; }
.audit-row .ip { font-family: var(--font-mono); color: var(--md-on-surface-variant); }
.audit-row .when { margin-left: auto; color: var(--md-on-surface-variant); white-space: nowrap; }

/* ------------------------------ progress --------------------------- */

.progress {
  height: 4px;
  background: var(--md-surface-container-highest);
  border-radius: var(--md-corner-full);
  overflow: hidden;
  margin-top: 12px;
  display: none;
}
.progress.active { display: block; }
.progress .bar {
  height: 100%;
  width: 0%;
  background: var(--md-primary);
  transition: width 150ms linear;
}

/* ------------------------------ responsive ------------------------- */

@media (max-width: 640px) {
  main { padding: 16px; }
  .top-app-bar { padding: 8px 16px; }
  .card { padding: 16px; }
  .auth-card { padding: 24px; }
  .list-item { padding: 12px; gap: 12px; }
  .list-item .trailing .btn span { display: none; }
  .audit-row .ip { display: none; }
  .hide-sm { display: none !important; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    transition-duration: .01ms !important;
    animation-duration: .01ms !important;
  }
}