:root {
  --font-sans: "Inter", "Inter var", "Segoe UI", system-ui, -apple-system, "Helvetica Neue", sans-serif;
  --font-mono: "DM Mono", "JetBrains Mono", "SFMono-Regular", Menlo, Monaco, Consolas, "Liberation Mono", monospace;
  --color-canvas: #f5f6f8;
  --color-surface: #ffffff;
  --color-surface-subtle: #f1f3f7;
  --color-border: #d0d5dd;
  --color-border-strong: #9aa2af;
  --color-heading: #101828;
  --color-text: #1f2933;
  --color-text-muted: #52616b;
  --color-link: #2563eb;
  --color-link-hover: #1d4ed8;
  --color-accent: #2563eb;
  --color-accent-strong: #1e3faa;
  --color-accent-contrast: #ffffff;
  --color-success-text: #0f5132;
  --color-success-bg: #d1fadf;
  --color-error-text: #b42318;
  --color-error-bg: #ffe3e3;
  --color-info-text: #0f609b;
  --color-info-bg: #d6ecff;
  --color-danger: #dc2626;
  --shadow-soft: 0 10px 30px rgba(15, 23, 42, 0.08);
  --radius-none: 0;
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 10px;
  --space-xxs: 0.25rem;
  --space-xs: 0.5rem;
  --space-sm: 0.75rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2.25rem;
  --space-xxl: 3.5rem;
  --layout-max-width: 1080px;
  --layout-padding: clamp(1.5rem, 3vw + 1rem, 3.25rem);
  --transition-base: 160ms ease;
}

@media (prefers-color-scheme: dark) {
  :root {
    --color-canvas: #0f172a;
    --color-surface: #141b2f;
    --color-surface-subtle: #1b243b;
    --color-border: #25304a;
    --color-border-strong: #3d4d6b;
    --color-heading: #f8fafc;
    --color-text: #e2e8f0;
    --color-text-muted: #94a3b8;
    --color-link: #60a5fa;
    --color-link-hover: #93c5fd;
    --color-accent: #60a5fa;
    --color-accent-strong: #3b82f6;
    --color-accent-contrast: #0b1120;
    --color-success-text: #34d399;
    --color-success-bg: #1a4d2e;
    --color-error-text: #fca5a5;
    --color-error-bg: #4a1f1f;
    --color-info-text: #bae6fd;
    --color-info-bg: #1e3a5f;
    --color-danger: #f87171;
    --shadow-soft: 0 0 0 #000000;
  }
}

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

html {
  height: 100%;
  background: var(--color-canvas);
}

body {
  height: 100%;
  margin: 0;
  font-family: var(--font-sans);
  background: none;
  color: var(--color-text);
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

body,
#app,
#admin-app {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

#app,
#admin-app {
  flex: 1;
}

a,
a:visited {
  color: var(--color-link);
  text-decoration: none;
}

a:hover,
a:focus-visible {
  color: var(--color-link-hover);
  text-decoration: underline;
}

a:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.app-shell {
  flex: 1;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

.app-main {
  flex: 1;
  display: flex;
  flex-direction: column;
}

.view-root {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding: var(--layout-padding);
  box-sizing: border-box;
  margin: 0 auto;
  width: min(100%, var(--layout-max-width));
}

.view-root--wide {
  width: min(100%, 1200px);
}

.view-root--narrow {
  max-width: 540px;
}

.view-header {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.view-header h1 {
  margin: 0;
  font-weight: 600;
  color: var(--color-heading);
}

.view-lede {
  margin: 0;
  color: var(--color-text-muted);
  font-size: 1rem;
}

.section-block {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.section-block h2 {
  margin: 0;
  font-size: clamp(1.25rem, 1.5vw + 1rem, 1.65rem);
  font-weight: 600;
  color: var(--color-heading);
}

.section-body {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.button-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: flex-start;
}

.surface {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-lg);
  box-shadow: var(--shadow-soft);
}

.surface--tight {
  padding: var(--space-md);
}

button {
  font-family: inherit;
  font-size: 1rem;
  font-weight: 500;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  padding: 0.65rem 1.1rem;
  cursor: pointer;
  transition: all var(--transition-base);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  background: var(--color-surface);
  color: var(--color-text);
}

button:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

button:disabled {
  cursor: not-allowed;
  filter: opacity(0.6);
}

.btn-primary {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  border-color: var(--color-accent);
  box-shadow: var(--shadow-soft);
}

.btn-primary:hover:not(:disabled) {
  background: var(--color-accent-strong);
  border-color: var(--color-accent-strong);
}

.btn-secondary {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}

.btn-secondary:hover:not(:disabled) {
  border-color: var(--color-border-strong);
  background: var(--color-surface-subtle);
}

.btn-danger {
  background: var(--color-danger);
  color: var(--color-accent-contrast);
  border-color: transparent;
}

.btn-danger:hover:not(:disabled) {
  filter: brightness(0.92);
}

input[type="text"],
input[type="search"],
input[type="email"],
textarea,
select {
  font: inherit;
  width: 100%;
  padding: 0.65rem 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  background: var(--color-surface);
  color: var(--color-text);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

input:focus-visible,
textarea:focus-visible,
select:focus-visible {
  border-color: var(--color-accent);
  box-shadow: 0 0 0 3px #c7d2fe;
  outline: none;
}

label {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  color: var(--color-text);
}

p {
  margin: 0;
  color: var(--color-text);
}

small {
  color: var(--color-text-muted);
}

.table-wrapper {
  overflow-x: auto;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
}

table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.95rem;
}

thead tr {
  background: var(--color-surface-subtle);
  color: var(--color-text-muted);
}

td,
th {
  padding: 0.65rem 0.75rem;
  border-bottom: 1px solid var(--color-border);
  text-align: left;
}

.center {
  text-align: center;
}

.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  border-radius: var(--radius-sm);
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 0.75rem;
}

.global-status {
  position: fixed;
  top: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  z-index: 1200;
  min-width: min(520px, calc(100vw - 2rem));
  display: none;
}

.global-status .status {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.85rem 1.25rem;
  border-radius: var(--radius-sm);
  border-width: 1px;
  border-style: solid;
  background: var(--color-surface);
  box-shadow: var(--shadow-soft);
  font-weight: 550;
}

.status.info {
  border-color: #3b82f6;
  color: var(--color-info-text);
  background: var(--color-info-bg);
}

.status.success {
  border-color: #16a34a;
  color: var(--color-success-text);
  background: var(--color-success-bg);
}

.status.error {
  border-color: #dc2626;
  color: var(--color-error-text);
  background: var(--color-error-bg);
}

.dialog-overlay {
  position: fixed;
  inset: 0;
  background: #1e293b;
  backdrop-filter: blur(6px);
  z-index: 1100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.device-dialog,
.modal {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  width: min(520px, 100%);
  max-height: calc(100vh - 3rem);
  overflow-y: auto;
  padding: 1.75rem;
  box-shadow: var(--shadow-soft);
  color: var(--color-text);
}

.qr-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
  color: var(--color-text-muted);
}

.qr-code {
  border: 1px solid var(--color-border);
  padding: 0.75rem;
  background: var(--color-surface);
}

.link-container,
.token-display,
.token-info {
  background: var(--color-surface-subtle);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 0.75rem;
  color: var(--color-text);
}

:root { --card-width: 22rem; }

.record-list,
.credential-list,
.session-list {
  width: 100%;
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: repeat(auto-fit, var(--card-width));
  justify-content: start;
  gap: 1rem 1.25rem;
  align-items: stretch;
  margin: 0 auto;
  max-width: calc(var(--card-width) * 4 + 3 * 1.25rem);
}

@media (max-width: 1100px) {
  .record-list,
  .credential-list,
  .session-list { max-width: calc(var(--card-width) * 3 + 2 * 1.25rem); }
}

@media (max-width: 720px) {
  .record-list { display: flex; flex-direction: column; max-width: 100%; }
}

.record-item,
.credential-item,
.session-item {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  padding: 1rem;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  background: var(--color-surface);
  height: 100%;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
  position: relative;
}

.record-item:hover,
.credential-item:hover,
.session-item:hover {
  border-color: var(--color-border-strong);
  box-shadow: 0 10px 24px rgba(15, 23, 42, 0.12);
  transform: translateY(-1px);
}

.record-item.is-current,
.credential-item.current-session,
.session-item.is-current { border-color: var(--color-accent); }

.item-top {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.item-icon {
  width: 40px;
  height: 40px;
  display: grid;
  place-items: center;
  background: var(--color-surface-subtle, transparent);
  border-radius: var(--radius-sm);
  border: 1px solid var(--color-border);
  flex-shrink: 0;
}

.auth-icon {
  border-radius: var(--radius-sm);
}

.item-title {
  flex: 1;
  margin: 0;
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-heading);
}

.item-actions {
  flex-shrink: 0;
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.item-actions .badge + .btn-card-delete { margin-left: 0.25rem; }
.item-actions .badge + .badge { margin-left: 0.25rem; }

.item-details {
  margin-left: calc(40px + 1rem);
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.credential-dates {
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: 7rem 1fr;
  gap: 0.35rem 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  align-items: center;
}

.session-dates {
  display: grid;
  grid-auto-flow: row;
  grid-template-columns: 7rem 1fr;
  gap: 0.35rem 0.5rem;
  font-size: 0.75rem;
  color: var(--color-text-muted);
  align-items: center;
}

.date-label {
  font-weight: 500;
  color: inherit;
}

.date-value {
  color: var(--color-text);
}

.btn-card-delete { background: transparent; border: none; color: var(--color-danger); padding: 0.35rem 0.5rem; font-size: 1.05rem; line-height: 1; border-radius: var(--radius-sm); cursor: pointer; display: inline-flex; align-items: center; justify-content: center; }
.btn-card-delete:hover:not(:disabled) { background: #fee; }
.btn-card-delete:disabled { filter: opacity(0.4); cursor: not-allowed; }


.session-emoji {
  font-size: 1.2rem;
}

.badge {
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-sm);
  font-size: 0.8rem;
  font-weight: 500;
}

.badge-current {
  background: var(--color-accent);
  color: var(--color-accent-contrast);
  box-shadow: 0 0 0 1px var(--color-accent) inset;
}

.badge:not(.badge-current) {
  background: var(--color-surface-subtle);
  color: var(--color-text-muted);
  border: 1px solid var(--color-border);
}


.session-meta-info {
  font-size: 0.75rem;
  color: var(--color-text-muted);
  font-family: monospace;
}

.empty-state {
  text-align: center;
  padding: var(--space-lg);
  color: var(--color-text-muted);
}

.empty-state p {
  margin: 0;
}

.user-info {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  padding: 1.1rem 1.25rem;
  display: grid;
  grid-template-columns: auto 1fr;
  gap: 0.75rem 1.25rem;
}

.user-info h3 {
  margin: 0;
  grid-column: span 2;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 1.15rem;
  font-weight: 600;
}

.user-info span {
  text-align: left;
  color: var(--color-text);
}

.toggle-link {
  color: var(--color-link);
  cursor: pointer;
}

.toggle-link:hover {
  color: var(--color-link-hover);
}

.token-info code {
  font-family: var(--font-mono);
}

@media (max-width: 720px) {
  .view-root {
    padding: clamp(1rem, 3vw + 0.75rem, 2rem);
    gap: 1.75rem;
  }

  .credential-dates {
    grid-auto-flow: row;
    grid-template-columns: auto auto;
  }

  button {
    width: 100%;
  }

  .button-row {
    flex-direction: column;
  }

  .global-status {
    top: 1rem;
  }
}

.dialog-backdrop {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  background: #334155;
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1000;
}

.dialog-container {
  max-width: 90vw;
  max-height: 90vh;
  overflow-y: auto;
}

.dialog-content {
  flex: none;
  width: 100%;
  max-width: 480px;
  padding: 2rem;
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px #1e293b;
  border: 1px solid var(--color-border);
}

.dialog-content--wide {
  max-width: 540px;
}

.dialog-content--narrow {
  max-width: 420px;
}

@media (max-width: 720px) {
  .dialog-content {
    padding: 1.5rem;
  }
}