/* Minimal Material Design 3 layout */

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

body {
  margin: 0;
  min-height: 100vh;
  background: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  font-family: "Roboto", "Noto Sans SC", "PingFang SC", "Microsoft YaHei", sans-serif;
}

md-icon {
  font-family: "Material Symbols Outlined";
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  line-height: 1;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

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

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

/* Viewport-locked mobile app shells (no page scroll) */
.body-practice,
.body-auth {
  overflow: hidden;
  height: 100dvh;
}

.body-practice .app-shell,
.body-auth .app-shell {
  height: 100dvh;
  max-height: 100dvh;
  overflow: hidden;
}

.site-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--md-sys-spacing-3);
  padding: var(--md-sys-spacing-3) var(--md-sys-spacing-4);
  background: var(--md-sys-color-surface-container);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-title {
  font-weight: 500;
  white-space: nowrap;
}

.site-nav {
  display: flex;
  align-items: center;
  flex-shrink: 0;
}

.site-nav__link {
  background: none;
  border: none;
  padding: var(--md-sys-spacing-2) var(--md-sys-spacing-3);
  font: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--md-sys-color-on-surface-variant);
  cursor: pointer;
  border-radius: var(--md-sys-shape-corner-full);
  text-decoration: none;
  line-height: 1.25;
}

.site-nav__link.is-active {
  color: var(--md-sys-color-on-primary-container);
  background: var(--md-sys-color-primary-container);
}

.site-nav__logout {
  margin: 0;
  display: contents;
}

.page-content {
  flex: 1;
  width: 100%;
  max-width: 720px;
  margin: 0 auto;
  padding: var(--md-sys-spacing-5) var(--md-sys-spacing-4);
}

.page-header {
  margin-bottom: var(--md-sys-spacing-6);
}

.page-header h1 {
  margin: 0;
}

.page-header .subtitle {
  margin: var(--md-sys-spacing-2) 0 0;
  color: var(--md-sys-color-on-surface-variant);
}

.page-meta {
  margin: var(--md-sys-spacing-3) 0 0;
  color: var(--md-sys-color-on-surface-variant);
}

.section {
  margin-bottom: var(--md-sys-spacing-6);
}

.section-title {
  margin: 0 0 var(--md-sys-spacing-4);
}

.action-row {
  display: flex;
  justify-content: center;
  margin-bottom: var(--md-sys-spacing-5);
}

/* ── Login (M3 expressive split) ─────────────────────────── */

.page-content--auth {
  max-width: none;
  padding: 0;
  flex: 1;
  min-height: 0;
  overflow: hidden;
}

.auth-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  height: 100%;
  min-height: 0;
  overflow: hidden;
}

.auth-hero {
  position: relative;
  display: flex;
  align-items: flex-end;
  padding: var(--md-sys-spacing-10) var(--md-sys-spacing-8);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  overflow: hidden;
}

.auth-hero__shapes {
  position: absolute;
  inset: 0;
  pointer-events: none;
}

.m3-blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(0);
  opacity: 0.35;
}

.m3-blob--a {
  width: 280px;
  height: 280px;
  top: -60px;
  right: -40px;
  background: var(--md-sys-color-tertiary);
}

.m3-blob--b {
  width: 200px;
  height: 200px;
  bottom: 20%;
  left: -50px;
  background: var(--md-sys-color-secondary-container);
  opacity: 0.5;
}

.auth-hero__content {
  position: relative;
  z-index: 1;
  max-width: 360px;
}

.auth-hero__tag {
  margin: 0 0 var(--md-sys-spacing-3);
  letter-spacing: 0.12em;
  opacity: 0.85;
  font-weight: 500;
}

.auth-hero__title {
  margin: 0;
  font-weight: 700;
  line-height: 1.1;
}

.auth-hero__lead {
  margin: var(--md-sys-spacing-4) 0 0;
  opacity: 0.9;
  max-width: 28ch;
}

.auth-panel {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--md-sys-spacing-8);
  background:
    radial-gradient(ellipse 90% 60% at 100% 0%, var(--app-auth-glow), transparent 55%),
    var(--md-sys-color-surface);
}

.auth-card {
  width: 100%;
  max-width: 400px;
  border-radius: var(--md-sys-shape-corner-extra-large);
  --md-elevated-card-container-color: var(--md-sys-color-surface-container-lowest);
  --md-elevated-card-container-elevation: var(--md-sys-elevation-3);
}

.auth-card__body {
  padding: var(--md-sys-spacing-8) var(--md-sys-spacing-6);
}

.auth-panel__title {
  margin: 0 0 var(--md-sys-spacing-6);
  color: var(--md-sys-color-on-surface);
}

.auth-banner {
  margin-bottom: var(--md-sys-spacing-4);
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-4);
}

.auth-form md-filled-text-field {
  width: 100%;
}

.auth-submit {
  width: 100%;
  margin-top: var(--md-sys-spacing-3);
  --md-filled-button-container-height: 52px;
  --md-filled-button-container-shape: var(--md-sys-shape-corner-full);
}

/* ── Practice (viewport-fit mobile shell) ───────────────── */

.page-content--practice {
  flex: 1;
  min-height: 0;
  max-width: 640px;
  width: 100%;
  margin: 0 auto;
  padding: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--app-surface-tint);
}

.site-header--practice {
  background: transparent;
  border-bottom: none;
}

.practice-stage {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-3);
  padding: var(--md-sys-spacing-4) var(--md-sys-spacing-5) var(--md-sys-spacing-6);
  margin: 0;
  border-radius: var(--md-sys-shape-corner-extra-large);
  background: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  flex-shrink: 0;
  box-shadow: var(--md-sys-elevation-2);
  overflow: hidden;
}

.practice-stage__glow {
  position: absolute;
  width: 160px;
  height: 160px;
  top: -50px;
  right: -30px;
  border-radius: 50%;
  background: var(--md-sys-color-tertiary);
  opacity: 0.35;
  pointer-events: none;
}

.practice-stage__main {
  position: relative;
  z-index: 1;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--md-sys-spacing-4);
}

.practice-stage__text {
  min-width: 0;
  flex: 1;
}

.practice-stage__label {
  margin: 0;
  letter-spacing: 0.14em;
  opacity: 0.9;
  font-weight: 600;
}

.practice-stage__title {
  margin: var(--md-sys-spacing-1) 0 0;
  font-weight: 700;
}

.m3-fab {
  position: relative;
  width: 72px;
  height: 72px;
  border: none;
  background: transparent;
  cursor: pointer;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}

.m3-fab--compact {
  width: 64px;
  height: 64px;
}

.m3-fab__ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  background: color-mix(in srgb, var(--md-sys-color-on-primary) 22%, transparent);
  transition: transform var(--md-sys-motion-standard);
}

.m3-fab__icon {
  position: absolute;
  inset: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--md-sys-color-on-primary);
  color: var(--md-sys-color-primary);
  box-shadow: var(--md-sys-elevation-3);
  transition: transform var(--md-sys-motion-standard), box-shadow var(--md-sys-motion-standard);
}

.m3-fab__icon md-icon {
  font-size: 28px !important;
  width: 28px;
  height: 28px;
}

.m3-fab:hover .m3-fab__icon {
  transform: scale(1.05);
}

.m3-fab:active .m3-fab__icon {
  transform: scale(0.94);
}

.m3-fab.recording .m3-fab__ring {
  animation: m3-pulse 1.2s ease-in-out infinite;
}

.m3-fab.recording .m3-fab__icon {
  background: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
}

@keyframes m3-pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.1); opacity: 0.7; }
}

.practice-stage__action {
  position: relative;
  z-index: 1;
  margin: 0;
  text-align: center;
  opacity: 0.92;
  font-weight: 500;
}

.practice-shell {
  flex: 1;
  min-height: 0;
  display: grid;
  grid-template-rows: auto auto minmax(0, 1fr);
  gap: var(--md-sys-spacing-2);
  padding: var(--md-sys-spacing-3) var(--md-sys-spacing-3) var(--md-sys-spacing-3);
  overflow: hidden;
}

.stats-grid--expressive {
  margin: 0;
  flex-shrink: 0;
}

.stat-tile {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0;
  padding: var(--md-sys-spacing-2) var(--md-sys-spacing-1);
  border-radius: var(--md-sys-shape-corner-large);
  text-align: center;
  min-height: 0;
  box-shadow: var(--md-sys-elevation-1);
}

.stat-tile__value {
  font-weight: 500;
  line-height: 1.2;
}

.stat-tile__label {
  opacity: 0.75;
  font-weight: 500;
}

.stat-tile--primary {
  background: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.stat-tile--secondary {
  background: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.stat-tile--tertiary {
  background: var(--md-sys-color-tertiary-container);
  color: var(--md-sys-color-on-tertiary-container);
}

.stat-tile--primary-deep {
  background: var(--app-primary-deep);
  color: var(--app-on-primary-deep);
}

.practice-panels {
  display: grid;
  grid-template-rows: minmax(0, 1.4fr) minmax(0, 1fr);
  gap: var(--md-sys-spacing-2);
  min-height: 0;
  overflow: hidden;
}

.practice-panel {
  min-height: 0;
  display: flex;
  flex-direction: column;
  border-radius: var(--md-sys-shape-corner-large);
}

.practice-panel__inner {
  flex: 1;
  min-height: 0;
  display: flex;
  flex-direction: column;
  padding: var(--md-sys-spacing-3) var(--md-sys-spacing-4);
}

.content-card__header--compact {
  margin-bottom: var(--md-sys-spacing-2);
  flex-shrink: 0;
}

.panel-scroll {
  flex: 1;
  min-height: 0;
  overflow-y: auto;
  overflow-x: hidden;
  -webkit-overflow-scrolling: touch;
  overscroll-behavior: contain;
}

.content-card {
  border-radius: var(--md-sys-shape-corner-large);
  overflow: hidden;
  min-height: 0;
}

.content-card--transcript {
  --md-elevated-card-container-elevation: var(--md-sys-elevation-1);
}

.content-card--issues {
  --md-filled-tonal-card-container-color: var(--md-sys-color-surface-container-low);
}

.content-card__header {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
}

.content-card__header .section-title {
  margin: 0;
}

.content-card__badge {
  padding: 2px 8px;
  border-radius: var(--md-sys-shape-corner-full);
  background: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
  font-weight: 700;
  letter-spacing: 0.06em;
  font-size: 0.7rem;
}

md-filled-tonal-card {
  display: flex;
  flex-direction: column;
  min-height: 0;
  border-radius: var(--md-sys-shape-corner-large);
}

.summary-card--overlay {
  position: fixed;
  left: var(--md-sys-spacing-3);
  right: var(--md-sys-spacing-3);
  bottom: calc(var(--md-sys-spacing-3) + env(safe-area-inset-bottom, 0));
  z-index: 30;
  margin: 0;
  max-width: 614px;
  margin-inline: auto;
}

.record-btn.recording,
md-filled-button.recording {
  --md-filled-button-container-color: var(--md-sys-color-error);
  --md-filled-button-label-text-color: var(--md-sys-color-on-error);
}

.stats-grid--tonal {
  margin-bottom: var(--md-sys-spacing-6);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--md-sys-spacing-3);
  margin-bottom: var(--md-sys-spacing-4);
}

.stat-card {
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: var(--md-sys-spacing-4);
  text-align: center;
}

.stat-card .stat-value {
  color: var(--md-sys-color-primary);
  margin-bottom: var(--md-sys-spacing-1);
}

.stat-card .stat-label {
  color: var(--md-sys-color-on-surface-variant);
}

md-elevated-card,
md-filled-card,
md-outlined-card {
  display: block;
  border-radius: var(--md-sys-shape-corner-extra-large);
}

md-elevated-card {
  --md-elevated-card-container-color: var(--md-sys-color-surface-container-lowest);
  --md-elevated-card-container-elevation: var(--md-sys-elevation-1);
  display: flex;
  flex-direction: column;
  min-height: 0;
}

md-filled-card {
  --md-filled-card-container-color: var(--md-sys-color-surface-container-low);
}

md-outlined-card {
  --md-outlined-card-container-color: var(--md-sys-color-surface-container-lowest);
  --md-outlined-card-outline-color: var(--md-sys-color-outline-variant);
}

.card-inner {
  padding: var(--md-sys-spacing-4) var(--md-sys-spacing-5);
}

.card-inner--dense {
  padding: var(--md-sys-spacing-3) var(--md-sys-spacing-4);
}

.transcript-surface {
  min-height: 0;
  padding: var(--md-sys-spacing-3);
  background: var(--md-sys-color-surface-container-low);
  border-radius: var(--md-sys-shape-corner-medium);
  line-height: 1.65;
  border: 1px solid var(--md-sys-color-outline-variant);
}

.transcript-placeholder {
  color: var(--md-sys-color-on-surface-variant);
}

.error-word {
  color: var(--md-sys-color-error);
  text-decoration: underline wavy;
  text-underline-offset: 3px;
}

.partial {
  color: var(--md-sys-color-on-surface-variant);
  font-style: italic;
}

.issue-list {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-2);
  min-height: 0;
}

.issue-item {
  padding-bottom: var(--md-sys-spacing-2);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  font-size: 0.875rem;
}

.issue-item:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

.issue-item-header {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
  flex-wrap: wrap;
  margin-bottom: var(--md-sys-spacing-1);
}

.issue-suggestion {
  color: var(--md-sys-color-on-surface-variant);
}

md-assist-chip.type-filler {
  --md-assist-chip-container-color: var(--app-color-warning-container);
  --md-assist-chip-label-text-color: var(--app-color-on-warning-container);
}

md-assist-chip.type-repetition {
  --md-assist-chip-container-color: var(--md-sys-color-error-container);
  --md-assist-chip-label-text-color: var(--md-sys-color-on-error-container);
}

md-assist-chip.type-informal {
  --md-assist-chip-container-color: var(--md-sys-color-secondary-container);
  --md-assist-chip-label-text-color: var(--md-sys-color-on-secondary-container);
}

.score-badge {
  display: inline-flex;
  padding: var(--md-sys-spacing-1) var(--md-sys-spacing-3);
  border-radius: var(--md-sys-shape-corner-full);
  font-weight: 500;
}

.score-high {
  background: var(--app-color-success-container);
  color: var(--app-color-on-success-container);
}

.score-mid {
  background: var(--app-color-warning-container);
  color: var(--app-color-on-warning-container);
}

.score-low {
  background: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

.auth-wrapper {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--md-sys-spacing-6) var(--md-sys-spacing-4);
}

.page-content--auth .auth-wrapper {
  min-height: auto;
  flex: 1;
}

.auth-card {
  width: 100%;
  max-width: 360px;
}

.auth-form {
  display: flex;
  flex-direction: column;
  gap: var(--md-sys-spacing-4);
  margin-top: var(--md-sys-spacing-6);
}

.auth-form md-outlined-text-field {
  width: 100%;
}

md-banner {
  margin-top: var(--md-sys-spacing-4);
  --md-banner-container-color: var(--md-sys-color-error-container);
  --md-banner-on-container: var(--md-sys-color-on-error-container);
}

.session-list-actions {
  display: flex;
  align-items: center;
  gap: var(--md-sys-spacing-2);
}

.pagination {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--md-sys-spacing-3);
  margin-top: var(--md-sys-spacing-6);
}

.empty-state {
  text-align: center;
  padding: var(--md-sys-spacing-8) var(--md-sys-spacing-4);
  color: var(--md-sys-color-on-surface-variant);
}

.summary-actions {
  margin-top: var(--md-sys-spacing-4);
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--md-sys-spacing-1);
  margin-bottom: var(--md-sys-spacing-4);
  color: var(--md-sys-color-primary);
}

.ai-report-header,
.ai-status,
.ai-score-row,
.ai-section-title,
.ai-dimensions,
.ai-dimension-card,
.ai-quote,
.ai-list {
  margin-bottom: var(--md-sys-spacing-4);
}

.ai-score-row {
  display: flex;
  gap: var(--md-sys-spacing-6);
  flex-wrap: wrap;
}

.ai-dimensions {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--md-sys-spacing-3);
}

.ai-dimension-card {
  background: var(--md-sys-color-surface-container);
  border-radius: var(--md-sys-shape-corner-medium);
  padding: var(--md-sys-spacing-3);
}

.ai-score-value {
  color: var(--md-sys-color-primary);
}

.ai-summary {
  color: var(--md-sys-color-on-surface-variant);
}

.ai-quote {
  padding: var(--md-sys-spacing-2) var(--md-sys-spacing-3);
  border-left: 3px solid var(--md-sys-color-primary);
  background: var(--md-sys-color-surface-container-low);
  color: var(--md-sys-color-on-surface-variant);
}

.severity-low { background: var(--md-sys-color-secondary-container); }
.severity-medium { background: var(--app-color-warning-container); }
.severity-high { background: var(--md-sys-color-error-container); }

md-assist-chip.type-grammar,
md-assist-chip.type-logic,
md-assist-chip.type-expression,
md-assist-chip.type-other {
  --md-assist-chip-container-color: var(--md-sys-color-primary-container);
  --md-assist-chip-label-text-color: var(--md-sys-color-on-primary-container);
}

@media (max-width: 900px) {
  .auth-layout {
    grid-template-columns: 1fr;
    grid-template-rows: minmax(0, 36%) minmax(0, 64%);
  }

  .auth-hero {
    align-items: center;
    text-align: center;
    padding: var(--md-sys-spacing-6) var(--md-sys-spacing-5);
    min-height: 0;
  }

  .auth-hero__title {
    font-size: 1.75rem;
  }

  .auth-hero__lead {
    font-size: 0.9rem;
    margin-top: var(--md-sys-spacing-2);
  }

  .auth-hero__content {
    max-width: none;
  }

  .auth-panel {
    margin-top: calc(-1 * var(--md-sys-spacing-5));
    padding: 0 var(--md-sys-spacing-4) var(--md-sys-spacing-4);
    z-index: 1;
    min-height: 0;
    overflow: hidden;
  }

  .auth-card__body {
    padding: var(--md-sys-spacing-5) var(--md-sys-spacing-4);
  }

  .auth-panel__title {
    margin-bottom: var(--md-sys-spacing-4);
  }
}

@media (max-width: 720px) {
  .site-header {
    padding: var(--md-sys-spacing-2) var(--md-sys-spacing-3);
    padding-top: calc(var(--md-sys-spacing-2) + env(safe-area-inset-top, 0));
    flex-shrink: 0;
  }

  .body-practice .page-content--practice {
    padding-bottom: env(safe-area-inset-bottom, 0);
  }

  .stats-grid,
  .ai-dimensions {
    grid-template-columns: repeat(4, 1fr);
    gap: var(--md-sys-spacing-2);
  }
}

@media (min-width: 721px) {
  .practice-shell {
    padding: var(--md-sys-spacing-4);
    gap: var(--md-sys-spacing-4);
  }

  .practice-stage {
    padding: var(--md-sys-spacing-5) var(--md-sys-spacing-6);
    border-radius: var(--md-sys-shape-corner-extra-large);
  }

  .m3-fab,
  .m3-fab--compact {
    width: 80px;
    height: 80px;
  }

  .stat-tile {
    padding: var(--md-sys-spacing-4);
    border-radius: var(--md-sys-shape-corner-extra-large);
  }
}