/*
 * MikuAuth — Material Design 3 styling.
 * Hatsune Miku accent color: #39C5BB.
 */

:root {
  /* MD3 color tokens — light scheme */
  --md-primary: #00897b;
  --md-on-primary: #ffffff;
  --md-primary-container: #b2f1ea;
  --md-on-primary-container: #002923;
  --md-secondary: #4a635f;
  --md-on-secondary: #ffffff;
  --md-secondary-container: #cce8e2;
  --md-on-secondary-container: #06201c;
  --md-tertiary: #455e91;
  --md-tertiary-container: #d8e2ff;
  --md-error: #ba1a1a;
  --md-on-error: #ffffff;
  --md-error-container: #ffdad6;
  --md-on-error-container: #410002;
  --md-background: #fafdfc;
  --md-on-background: #161d1c;
  --md-surface: #fafdfc;
  --md-on-surface: #161d1c;
  --md-surface-variant: #dae5e2;
  --md-on-surface-variant: #3f4947;
  --md-surface-container: #eef2f1;
  --md-surface-container-high: #e8edec;
  --md-outline: #6f7977;
  --md-outline-variant: #bec9c6;

  /* Miku accent */
  --miku: #39c5bb;
  --miku-on: #00201d;

  /* Type scale */
  --md-display: 'Roboto', system-ui, -apple-system, sans-serif;
  --md-body: 'Roboto', system-ui, -apple-system, sans-serif;

  --shape-sm: 8px;
  --shape-md: 12px;
  --shape-lg: 16px;
  --shape-xl: 28px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --md-primary: #84d5cb;
    --md-on-primary: #003731;
    --md-primary-container: #005048;
    --md-on-primary-container: #b2f1ea;
    --md-secondary: #b1ccc6;
    --md-on-secondary: #1c3531;
    --md-secondary-container: #334b47;
    --md-on-secondary-container: #cce8e2;
    --md-tertiary: #afc6ff;
    --md-tertiary-container: #2d4678;
    --md-error: #ffb4ab;
    --md-on-error: #690005;
    --md-error-container: #93000a;
    --md-on-error-container: #ffdad6;
    --md-background: #0e1514;
    --md-on-background: #dee4e2;
    --md-surface: #0e1514;
    --md-on-surface: #dee4e2;
    --md-surface-variant: #3f4947;
    --md-on-surface-variant: #bec9c6;
    --md-surface-container: #1a2221;
    --md-surface-container-high: #242c2b;
    --md-outline: #899392;
    --md-outline-variant: #3f4947;
    --miku: #39c5bb;
    --miku-on: #00201d;
  }
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  font-family: var(--md-body);
  background: var(--md-background);
  color: var(--md-on-background);
  min-height: 100%;
  -webkit-font-smoothing: antialiased;
}

body {
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

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

a:hover {
  text-decoration: underline;
}

/* ------------------------------------------------------------------ Header */

.app-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 24px;
  background: var(--md-surface-container);
  border-bottom: 1px solid var(--md-outline-variant);
  position: sticky;
  top: 0;
  z-index: 10;
}

.app-bar .logo {
  font-weight: 600;
  font-size: 1.25rem;
  color: var(--md-on-surface);
  display: flex;
  align-items: center;
  gap: 8px;
}

.app-bar .logo .miku-note {
  color: var(--miku);
  font-size: 1.4rem;
  line-height: 1;
}

.app-bar .nav {
  margin-left: auto;
  display: flex;
  gap: 8px;
  align-items: center;
}

.app-bar .nav .user-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 12px;
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
  border-radius: 999px;
  font-size: 0.875rem;
}

/* ------------------------------------------------------------------- Main */

main {
  flex: 1;
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 32px 16px;
}

.container {
  width: 100%;
  max-width: 480px;
}

.container.wide {
  max-width: 960px;
}

.surface-card {
  background: var(--md-surface-container);
  color: var(--md-on-surface);
  border-radius: var(--shape-xl);
  padding: 32px;
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.08), 0 1px 3px rgba(0, 0, 0, 0.06);
}

h1 {
  font-size: 1.75rem;
  font-weight: 500;
  margin: 0 0 8px 0;
  color: var(--md-on-surface);
}

h1 .accent {
  color: var(--miku);
}

h2 {
  font-size: 1.25rem;
  font-weight: 500;
  margin: 24px 0 12px 0;
  color: var(--md-on-surface);
}

p.lead {
  color: var(--md-on-surface-variant);
  margin: 0 0 24px 0;
}

/* ----------------------------------------------------------------- Forms */

form.stack {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.field {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.field label {
  font-size: 0.875rem;
  color: var(--md-on-surface-variant);
  font-weight: 500;
}

.field input[type="text"],
.field input[type="email"],
.field input[type="password"] {
  font: inherit;
  padding: 12px 16px;
  border-radius: var(--shape-sm);
  border: 1px solid var(--md-outline);
  background: var(--md-surface);
  color: var(--md-on-surface);
  transition: border-color 0.15s, box-shadow 0.15s;
}

.field input:focus {
  outline: none;
  border-color: var(--md-primary);
  box-shadow: 0 0 0 2px var(--md-primary-container);
}

.field-checkbox {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 4px 0;
}

.field-checkbox input[type="checkbox"] {
  width: 20px;
  height: 20px;
  accent-color: var(--md-primary);
}

.field-help {
  color: var(--md-on-surface-variant);
  font-size: 0.75rem;
}

/* --------------------------------------------------------------- Buttons */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border-radius: 999px;
  border: none;
  font: inherit;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s, color 0.15s;
  text-decoration: none;
}

.btn-filled {
  background: var(--md-primary);
  color: var(--md-on-primary);
}

.btn-filled:hover {
  background: var(--md-primary);
  filter: brightness(1.1);
  text-decoration: none;
}

.btn-tonal {
  background: var(--md-secondary-container);
  color: var(--md-on-secondary-container);
}

.btn-tonal:hover {
  filter: brightness(0.97);
  text-decoration: none;
}

.btn-outlined {
  background: transparent;
  color: var(--md-primary);
  border: 1px solid var(--md-outline);
}

.btn-outlined:hover {
  background: var(--md-primary-container);
  text-decoration: none;
}

.btn-text {
  background: transparent;
  color: var(--md-primary);
  padding: 12px 16px;
}

.btn-text:hover {
  background: var(--md-primary-container);
  text-decoration: none;
}

.btn-danger {
  background: var(--md-error-container);
  color: var(--md-on-error-container);
}

.btn-danger:hover {
  filter: brightness(0.97);
  text-decoration: none;
}

.btn-row {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
}

/* --------------------------------------------------------------- Banners */

.banner-error {
  background: var(--md-error-container);
  color: var(--md-on-error-container);
  padding: 12px 16px;
  border-radius: var(--shape-md);
  font-size: 0.9rem;
}

.banner-error ul {
  margin: 4px 0 0 0;
  padding-left: 20px;
}

.banner-info {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
  padding: 12px 16px;
  border-radius: var(--shape-md);
  font-size: 0.9rem;
}

/* ----------------------------------------------------------------- Table */

.table-wrap {
  overflow-x: auto;
  border-radius: var(--shape-lg);
  border: 1px solid var(--md-outline-variant);
}

table.users {
  width: 100%;
  border-collapse: collapse;
  background: var(--md-surface);
}

table.users th,
table.users td {
  text-align: left;
  padding: 12px 16px;
  border-bottom: 1px solid var(--md-outline-variant);
  font-size: 0.9rem;
}

table.users th {
  background: var(--md-surface-container-high);
  color: var(--md-on-surface-variant);
  font-weight: 500;
}

table.users tr:last-child td {
  border-bottom: none;
}

.tag {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
}

.tag-admin {
  background: var(--md-tertiary-container);
  color: var(--md-on-primary-container);
}

.tag-active {
  background: var(--md-primary-container);
  color: var(--md-on-primary-container);
}

.tag-disabled {
  background: var(--md-error-container);
  color: var(--md-on-error-container);
}

.row-actions {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}

/* ---------------------------------------------------------------- Footer */

footer {
  padding: 16px 24px;
  text-align: center;
  color: var(--md-on-surface-variant);
  font-size: 0.8rem;
  border-top: 1px solid var(--md-outline-variant);
}

footer .miku-note {
  color: var(--miku);
}

/* --------------------------------------------------------- Mobile tweaks */

@media (max-width: 640px) {
  main {
    padding: 16px 8px;
  }
  .surface-card {
    padding: 24px 20px;
    border-radius: var(--shape-lg);
  }
  .app-bar {
    padding: 12px 16px;
  }
  .btn-row {
    flex-direction: column;
    align-items: stretch;
  }
  .btn-row .btn {
    width: 100%;
  }
}