:root {
  color-scheme: light;
  --md-primary: #00639b;
  --md-primary-container: #d0e4ff;
  --md-on-primary: #ffffff;
  --md-surface: #f8fbff;
  --md-surface-container: #ecf1f8;
  --md-outline: #bec8d4;
  --md-text: #17212b;
  --md-text-muted: #4a5b70;
  --md-shadow-1: 0 1px 2px rgba(11, 29, 49, 0.08), 0 2px 8px rgba(11, 29, 49, 0.06);
  --md-shadow-2: 0 8px 26px rgba(18, 40, 65, 0.1);
  --bs-primary: var(--md-primary);
  --bs-primary-rgb: 0, 99, 155;
}

* {
  font-family: "Roboto Flex", "Segoe UI", sans-serif;
}

body.app-shell {
  position: relative;
  background:
    radial-gradient(circle at 12% 10%, rgba(208, 228, 255, 0.8), transparent 28%),
    radial-gradient(circle at 85% 2%, rgba(228, 236, 255, 0.9), transparent 36%),
    linear-gradient(180deg, #f4f8ff 0%, var(--md-surface) 55%, #eef3fb 100%);
  color: var(--md-text);
  min-height: 100vh;
}

.md-appbar {
  background: rgba(248, 251, 255, 0.88);
  border-bottom: 1px solid var(--md-outline);
  backdrop-filter: blur(12px);
}

.md-appbar .navbar-brand,
.md-appbar .material-symbols-outlined {
  color: var(--md-primary);
}

.md-brand-logo {
  display: block;
  height: 44px;
  max-width: 100%;
  width: auto;
}

.md-appbar .navbar-toggler {
  border-color: var(--md-outline);
}

.md-appbar .navbar-toggler-icon {
  filter: saturate(0) brightness(0.2);
}

.md-nav-link {
  border-radius: 999px;
  color: var(--md-text-muted);
  font-weight: 560;
  margin-right: 0.3rem;
  padding: 0.42rem 0.9rem;
}

.md-nav-link:hover,
.md-nav-link:focus {
  background: var(--md-primary-container);
  color: #003456;
}

.md-user-name {
  color: var(--md-text-muted);
  font-size: 0.92rem;
  font-weight: 560;
}

.card {
  border: 1px solid rgba(190, 200, 212, 0.45);
  border-radius: 1.4rem;
  box-shadow: var(--md-shadow-1);
}

.card-header {
  border-radius: 1.4rem 1.4rem 0 0;
}

.stat-card {
  min-height: 140px;
  background: linear-gradient(140deg, rgba(255, 255, 255, 0.95), rgba(236, 241, 248, 0.88));
}

.btn {
  border-radius: 999px;
  font-weight: 600;
  letter-spacing: 0.015em;
}

.btn-primary {
  background: linear-gradient(120deg, #00639b, #115e95);
  border-color: transparent;
  box-shadow: 0 6px 14px rgba(0, 99, 155, 0.26);
}

.btn-primary:hover,
.btn-primary:focus {
  background: linear-gradient(120deg, #005889, #0e557f);
}

.btn-outline-primary {
  border-color: rgba(0, 99, 155, 0.45);
  color: #004d79;
}

.btn-outline-primary:hover,
.btn-outline-primary:focus {
  background: var(--md-primary-container);
  border-color: rgba(0, 99, 155, 0.1);
  color: #003a5c;
}

.table > :not(caption) > * > * {
  padding: 0.95rem 0.8rem;
}

.table-hover tbody tr:hover {
  background: rgba(208, 228, 255, 0.32);
}

.table-sort-button {
  align-items: center;
  background: transparent;
  border: 0;
  border-radius: 999px;
  color: inherit;
  cursor: pointer;
  display: inline-flex;
  font: inherit;
  font-weight: 600;
  gap: 0.4rem;
  padding: 0.15rem 0.5rem;
  transition: background-color 150ms ease, color 150ms ease;
}

.table-sort-button:hover,
.table-sort-button:focus-visible {
  background: var(--md-primary-container);
  color: #003a5c;
  outline: none;
}

.table-sort-button .sort-indicator::before {
  color: var(--md-text-muted);
  content: "↕";
  display: inline-block;
  font-size: 0.78rem;
  line-height: 1;
  transform: translateY(-1px);
}

.table-sort-button.is-active[data-sort-direction="asc"] .sort-indicator::before {
  color: var(--md-primary);
  content: "↑";
}

.table-sort-button.is-active[data-sort-direction="desc"] .sort-indicator::before {
  color: var(--md-primary);
  content: "↓";
}

.badge.text-bg-light {
  background-color: #dde9f8 !important;
  color: #21425d !important;
}

.dashboard-hero {
  background: linear-gradient(125deg, rgba(255, 255, 255, 0.9), rgba(226, 238, 254, 0.72));
  border: 1px solid rgba(190, 200, 212, 0.45);
  border-radius: 1.6rem;
  box-shadow: var(--md-shadow-2);
  padding: 1.25rem 1.35rem;
}

.material-idea-grid .card {
  background: linear-gradient(150deg, #ffffff, #f4f8ff);
}

.material-idea-grid h3 {
  color: #003e64;
  font-size: 1.05rem;
}

.material-idea-grid p {
  color: var(--md-text-muted);
  font-size: 0.95rem;
}

.idea-chip {
  background: var(--md-primary-container);
  border-radius: 999px;
  color: #003a5b;
  display: inline-flex;
  font-size: 0.82rem;
  font-weight: 640;
  padding: 0.26rem 0.7rem;
}

.password-strength {
  background: #dde5ef;
  border-radius: 999px;
  height: 0.45rem;
  overflow: hidden;
}

.password-strength__bar {
  background: #9aa8bb;
  border-radius: inherit;
  height: 100%;
  transition: width 150ms ease, background-color 150ms ease;
  width: 0;
}

.password-strength__bar.is-weak {
  background: #c34848;
}

.password-strength__bar.is-medium {
  background: #c6872a;
}

.password-strength__bar.is-strong {
  background: #21824b;
}

.learning-mode-toolbar {
  align-items: end;
  display: grid;
  gap: 0.6rem;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr) auto;
}

.learning-mode-field {
  min-width: 0;
}

.learning-mode-label {
  margin-bottom: 0.35rem;
}

.learning-mode-action .btn {
  white-space: nowrap;
}

.learning-answer-actions {
  align-items: center;
}

.learning-edit-inline {
  white-space: nowrap;
}

.learning-start-card {
  max-width: 980px;
}

.learning-session-card {
  max-width: 1050px;
}

.learning-session-card .h3 {
  font-size: 1.85rem;
  margin-bottom: 0.25rem;
}

.learning-session-card .h4 {
  font-size: 1.7rem;
  line-height: 1.25;
}

.learning-session-card .text-secondary {
  margin-bottom: 0.2rem;
}

.learning-hint-pill {
  align-items: center;
  background: linear-gradient(120deg, rgba(208, 228, 255, 0.5), rgba(235, 243, 255, 0.75));
  border: 1px solid rgba(0, 99, 155, 0.2);
  border-radius: 0.9rem;
  color: #1f364d;
  display: inline-flex;
  flex-wrap: wrap;
  gap: 0.35rem;
  padding: 0.32rem 0.55rem;
}

.learning-hint-pill__label {
  background: rgba(0, 99, 155, 0.12);
  border-radius: 999px;
  color: #004a74;
  font-size: 0.78rem;
  font-weight: 680;
  letter-spacing: 0.01em;
  padding: 0.08rem 0.45rem;
}

.learning-hint-pill__text {
  font-size: 0.93rem;
  font-weight: 520;
  line-height: 1.35;
}

.learning-session-badge {
  font-size: 0.78rem;
  padding: 0.3rem 0.55rem;
}

.learning-session-card .learning-mode-toolbar {
  gap: 0.35rem;
}

.learning-session-card .form-select {
  min-height: calc(1.55em + 0.45rem + calc(var(--bs-border-width) * 2));
  padding: 0.28rem 0.55rem;
}

.learning-session-card .btn-lg {
  font-size: 1.02rem;
  padding: 0.38rem 0.9rem;
}

.learning-session-card .learning-answer-actions {
  gap: 0.35rem !important;
}

.learning-session-card .learning-answer-actions .btn {
  min-height: 2.3rem;
}

.learning-session-card [data-recognition-options] {
  margin-bottom: 0.6rem !important;
}

.learning-session-card [data-recognition-choice] {
  padding-bottom: 0.5rem !important;
  padding-top: 0.5rem !important;
}

.recognition-choice-wrong {
  background: #f3b5bc !important;
  border-color: #b21f2d !important;
  color: #5d0f17 !important;
}

.recognition-choice-wrong:hover,
.recognition-choice-wrong:focus,
.recognition-choice-wrong:active,
.recognition-choice-wrong:disabled {
  background: #f3b5bc !important;
  border-color: #b21f2d !important;
  color: #5d0f17 !important;
  opacity: 1;
}

.vocabulary-editor-card {
  max-width: 1120px;
}

.vocabulary-editor-form .form-label {
  margin-bottom: 0.3rem;
}

.vocabulary-editor-form .form-control,
.vocabulary-editor-form .form-select {
  min-height: calc(1.9em + 0.45rem + calc(var(--bs-border-width) * 2));
  padding: 0.35rem 0.55rem;
}

@media (max-width: 576px) {
  .learning-session-card {
    max-width: 100%;
  }

  .learning-session-card .card-body {
    padding: 0.8rem !important;
  }

  .learning-session-card .btn-lg {
    font-size: 0.95rem;
  }

  .learning-session-card .h3 {
    font-size: 1.65rem;
  }

  .learning-session-card .h4 {
    font-size: 1.45rem;
  }

  .learning-hint-pill {
    width: 100%;
  }

  .learning-mode-toolbar {
    align-items: center;
    gap: 0.45rem;
  }

  .learning-mode-label {
    display: none;
  }

  .learning-mode-toolbar .form-select {
    font-size: 0.95rem;
    min-height: 2.35rem;
    padding-bottom: 0.4rem;
    padding-top: 0.4rem;
  }

  .learning-mode-action .btn {
    font-size: 0.95rem;
    min-height: 2.35rem;
    padding: 0.42rem 0.75rem;
  }

  .learning-answer-actions .btn {
    font-size: 0.95rem;
    min-height: 2.3rem;
    padding: 0.42rem 0.8rem;
  }

  .learning-edit-inline {
    padding-left: 0.7rem;
    padding-right: 0.7rem;
  }
}