/* Google Material 3 (Material You) Design System Tokens & Styling */

:root {
  /* MD3 Light Color Palette (Default Google Baseline) */
  --md-sys-color-primary: #0b57d0;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #d3e3fd;
  --md-sys-color-on-primary-container: #041e49;

  --md-sys-color-secondary: #00639b;
  --md-sys-color-secondary-container: #c2e7ff;
  --md-sys-color-on-secondary-container: #001d35;

  --md-sys-color-surface: #f8fafd;
  --md-sys-color-surface-dim: #d9dadf;
  --md-sys-color-surface-bright: #f8fafd;
  --md-sys-color-surface-container-lowest: #ffffff;
  --md-sys-color-surface-container-low: #f3f4f8;
  --md-sys-color-surface-container: #eeeff3;
  --md-sys-color-surface-container-high: #e8e9ee;
  --md-sys-color-surface-container-highest: #e2e3e8;

  --md-sys-color-on-surface: #191c20;
  --md-sys-color-on-surface-variant: #44474e;
  --md-sys-color-outline: #74777f;
  --md-sys-color-outline-variant: #c4c6d0;

  --md-sys-color-error: #ba1a1a;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #ffdad6;
  --md-sys-color-on-error-container: #410002;

  --md-sys-color-success: #137333;
  --md-sys-color-success-container: #ceead6;
  --md-sys-color-on-success-container: #0d5223;

  /* Typography */
  --font-display: "Google Sans", "Roboto", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-text: "Google Sans Text", "Roboto", -apple-system, BlinkMacSystemFont, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Elevation Shadows */
  --md-elevation-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.08), 0px 1px 2px 0px rgba(0, 0, 0, 0.06);
  --md-elevation-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.10), 0px 1px 2px 0px rgba(0, 0, 0, 0.06);
  --md-elevation-3: 0px 4px 8px 3px rgba(0, 0, 0, 0.12), 0px 1px 3px 0px rgba(0, 0, 0, 0.08);

  /* Transitions */
  --md-motion-easing: cubic-bezier(0.2, 0, 0, 1);
  --md-motion-duration: 250ms;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body.m3-body {
  font-family: var(--font-text);
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  min-height: 100vh;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

/* Material Symbols Adjustments */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  font-size: 22px;
}

/* =========================================================================
   6-Digit Verification Lock Screen
   ========================================================================= */
.m3-lock-screen {
  position: fixed;
  inset: 0;
  background-color: rgba(248, 250, 253, 0.96);
  backdrop-filter: blur(8px);
  z-index: 150;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  transition: opacity var(--md-motion-duration) var(--md-motion-easing),
              visibility var(--md-motion-duration);
}

.m3-lock-screen.unlocked {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.m3-lock-card {
  max-width: 440px;
  width: 100%;
  text-align: center;
  padding: 36px 28px;
  border-radius: 28px;
  box-shadow: var(--md-elevation-3);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.m3-lock-icon-wrap {
  width: 56px;
  height: 56px;
  border-radius: 18px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 4px;
}

.m3-lock-icon-wrap .material-symbols-outlined {
  font-size: 30px;
}

.m3-lock-subtitle {
  font-size: 13.5px;
  color: var(--md-sys-color-on-surface-variant);
  max-width: 340px;
  line-height: 1.45;
}

.m3-demo-hint-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  padding: 4px 12px;
  border-radius: 16px;
  font-size: 11.5px;
  font-weight: 500;
  margin-top: 4px;
}

.m3-demo-hint-chip .material-symbols-outlined {
  font-size: 15px;
  color: var(--md-sys-color-primary);
}

/* PIN Input Group */
.m3-pin-input-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin: 16px 0 8px 0;
  width: 100%;
}

.m3-pin-digit {
  width: 46px;
  height: 56px;
  border-radius: 14px;
  border: 2px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container-lowest);
  color: var(--md-sys-color-on-surface);
  font-family: var(--font-display);
  font-size: 24px;
  font-weight: 600;
  text-align: center;
  outline: none;
  transition: all var(--md-motion-duration) var(--md-motion-easing);
  -webkit-appearance: none;
  box-shadow: var(--md-elevation-1);
}

.m3-pin-digit:focus {
  border-color: var(--md-sys-color-primary);
  box-shadow: 0 0 0 3px rgba(11, 87, 208, 0.2);
  transform: translateY(-1px);
}

.m3-pin-digit.filled {
  border-color: #a8c7fa;
  background-color: #f0f4f9;
}

/* Unlock Progress State */
.m3-unlock-progress {
  display: none;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: var(--md-sys-color-primary);
  font-weight: 500;
  margin: 8px 0;
}

.m3-unlock-progress.active {
  display: flex;
}

.m3-spinner {
  width: 20px;
  height: 20px;
  border: 3px solid var(--md-sys-color-primary-container);
  border-top-color: var(--md-sys-color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.m3-button-filled {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  width: 100%;
  height: 44px;
  border-radius: 22px;
  font-size: 14px;
  font-weight: 500;
  border: none;
  margin-top: 8px;
}

.m3-button-filled:not(:disabled):hover {
  background-color: #0842a0;
  box-shadow: var(--md-elevation-2);
}

.m3-button-filled:disabled {
  background-color: rgba(25, 28, 32, 0.12);
  color: rgba(25, 28, 32, 0.38);
  cursor: not-allowed;
  box-shadow: none;
}

.m3-quick-fill-btn {
  margin-top: 2px;
  font-size: 12.5px;
}

/* =========================================================================
   Top App Bar
   ========================================================================= */
.m3-top-app-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
  padding: 0 16px;
  background-color: var(--md-sys-color-surface-container-low);
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
  position: sticky;
  top: 0;
  z-index: 20;
}

.m3-app-bar-start {
  display: flex;
  align-items: center;
  gap: 12px;
}

.m3-app-bar-titles {
  display: flex;
  flex-direction: column;
}

.m3-app-bar-title {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  line-height: 1.2;
}

.m3-app-bar-subtitle {
  font-size: 11px;
  color: var(--md-sys-color-on-surface-variant);
}

.m3-app-bar-end {
  display: flex;
  align-items: center;
  gap: 8px;
}

.m3-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, #1a73e8, #4285f4);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

/* Icon Buttons */
.m3-icon-button {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  border: none;
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background-color var(--md-motion-duration) var(--md-motion-easing);
}

.m3-icon-button:hover {
  background-color: rgba(68, 71, 78, 0.08);
  color: var(--md-sys-color-on-surface);
}

.m3-icon-button:active {
  background-color: rgba(68, 71, 78, 0.16);
}

/* Main Layout */
.m3-main-container {
  max-width: 820px;
  margin: 0 auto;
  padding: 24px 16px 64px 16px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

/* Surface Cards */
.m3-surface-card {
  background-color: var(--md-sys-color-surface-container-lowest);
  border-radius: 20px;
  padding: 20px;
  border: 1px solid var(--md-sys-color-outline-variant);
  box-shadow: var(--md-elevation-1);
}

/* Hero Banner */
.m3-hero-banner {
  display: flex;
  align-items: flex-start;
  gap: 18px;
  background-color: #f0f4f9;
  border: 1px solid #d3e3fd;
}

.m3-hero-icon-container {
  width: 48px;
  height: 48px;
  border-radius: 14px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.m3-hero-icon {
  font-size: 26px;
}

.m3-hero-content {
  flex: 1;
}

.m3-title-medium {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 6px;
}

.m3-body-medium {
  font-size: 13.5px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.45;
}

.m3-body-small {
  font-size: 12.5px;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.4;
}

/* Chips Row */
.m3-chips-row {
  display: flex;
  align-items: center;
  gap: 8px;
  overflow-x: auto;
  padding-bottom: 4px;
}

.m3-filter-chip {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  height: 36px;
  padding: 0 14px;
  border-radius: 10px;
  border: 1px solid var(--md-sys-color-outline-variant);
  background-color: var(--md-sys-color-surface-container-lowest);
  color: var(--md-sys-color-on-surface-variant);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  white-space: nowrap;
  transition: all var(--md-motion-duration) var(--md-motion-easing);
}

.m3-filter-chip:hover {
  background-color: var(--md-sys-color-surface-container-high);
}

.m3-filter-chip.active {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  border-color: transparent;
}

.m3-filter-chip .material-symbols-outlined {
  font-size: 18px;
}

.m3-chip-count {
  background-color: rgba(0, 0, 0, 0.08);
  padding: 1px 7px;
  border-radius: 12px;
  font-size: 11px;
  font-weight: 600;
}

.m3-spacer {
  flex: 1;
}

.m3-text-button {
  background: transparent;
  border: none;
  color: var(--md-sys-color-primary);
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 8px;
  transition: background-color var(--md-motion-duration) var(--md-motion-easing);
}

.m3-text-button:hover {
  background-color: rgba(11, 87, 208, 0.08);
}

/* Sections */
.m3-section {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.m3-section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 4px;
}

.m3-title-small {
  font-family: var(--font-display);
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 0.6px;
  color: var(--md-sys-color-on-surface-variant);
  text-transform: uppercase;
}

.m3-section-badge {
  font-size: 12px;
  font-weight: 500;
  color: var(--md-sys-color-primary);
}

.m3-section-badge.text-muted {
  color: var(--md-sys-color-outline);
}

/* Device Cards List */
.m3-device-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

/* Single Device Card */
.m3-device-card {
  background-color: var(--md-sys-color-surface-container-lowest);
  border-radius: 20px;
  border: 1px solid var(--md-sys-color-outline-variant);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  box-shadow: var(--md-elevation-1);
  transition: all var(--md-motion-duration) var(--md-motion-easing);
  cursor: pointer;
}

.m3-device-card:hover {
  box-shadow: var(--md-elevation-2);
  border-color: #a8c7fa;
  transform: translateY(-1px);
}

.m3-device-card-left {
  display: flex;
  align-items: center;
  gap: 16px;
  flex: 1;
}

.m3-device-icon-container {
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
}

.m3-device-icon-container.is-current {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.m3-device-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.m3-device-name-row {
  display: flex;
  align-items: center;
  gap: 8px;
  flex-wrap: wrap;
}

.m3-device-title {
  font-family: var(--font-display);
  font-size: 16px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.m3-badge {
  font-size: 11px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 12px;
  display: inline-flex;
  align-items: center;
  gap: 4px;
}

.m3-badge-green {
  background-color: var(--md-sys-color-success-container);
  color: var(--md-sys-color-on-success-container);
}

.m3-badge-neutral {
  background-color: var(--md-sys-color-surface-container-high);
  color: var(--md-sys-color-on-surface-variant);
}

.m3-badge-revoked {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
}

.m3-device-meta {
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.m3-meta-bullet {
  opacity: 0.5;
}

.m3-device-card-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Standard M3 Buttons */
.m3-button {
  height: 38px;
  padding: 0 16px;
  border-radius: 19px;
  font-family: var(--font-display);
  font-size: 13.5px;
  font-weight: 500;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  cursor: pointer;
  border: 1px solid transparent;
  transition: all var(--md-motion-duration) var(--md-motion-easing);
}

.m3-button-outlined {
  background-color: transparent;
  border-color: var(--md-sys-color-outline-variant);
  color: var(--md-sys-color-primary);
}

.m3-button-outlined:hover {
  background-color: rgba(11, 87, 208, 0.08);
  border-color: var(--md-sys-color-primary);
}

.m3-button-destructive {
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-on-error-container);
  border: 1px solid transparent;
}

.m3-button-destructive:hover {
  background-color: #f9d2ce;
  box-shadow: var(--md-elevation-1);
}

.m3-button-text {
  background: transparent;
  color: var(--md-sys-color-on-surface-variant);
}

.m3-button-text:hover {
  background-color: rgba(68, 71, 78, 0.08);
  color: var(--md-sys-color-on-surface);
}

/* Security Recommendation Tip Card */
.m3-tip-card {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  background-color: var(--md-sys-color-surface-container-low);
  border: 1px solid var(--md-sys-color-outline-variant);
}

.m3-tip-icon {
  color: var(--md-sys-color-primary);
  font-size: 28px;
  flex-shrink: 0;
}

.m3-tip-body h4 {
  margin-bottom: 4px;
}

/* Dialog / Modal */
.m3-dialog-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(2px);
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 16px;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--md-motion-duration) var(--md-motion-easing);
}

.m3-dialog-backdrop.open {
  opacity: 1;
  pointer-events: auto;
}

.m3-dialog {
  background-color: var(--md-sys-color-surface-container-lowest);
  border-radius: 28px;
  max-width: 540px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  box-shadow: var(--md-elevation-3);
  transform: scale(0.92);
  transition: transform var(--md-motion-duration) var(--md-motion-easing);
  display: flex;
  flex-direction: column;
}

.m3-dialog-backdrop.open .m3-dialog {
  transform: scale(1);
}

.m3-dialog-header {
  padding: 24px 24px 16px 24px;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  border-bottom: 1px solid var(--md-sys-color-surface-container-high);
}

.m3-dialog-header-info {
  display: flex;
  align-items: center;
  gap: 16px;
}

.m3-dialog-device-icon {
  width: 48px;
  height: 48px;
  border-radius: 16px;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
}

.m3-title-large {
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
}

.m3-dialog-chip {
  display: inline-block;
  margin-top: 4px;
  font-size: 12px;
  font-weight: 500;
  padding: 2px 8px;
  border-radius: 10px;
  background-color: var(--md-sys-color-success-container);
  color: var(--md-sys-color-on-success-container);
}

.m3-dialog-content {
  padding: 20px 24px;
}

.m3-detail-grid {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

.m3-detail-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 12px;
  border-bottom: 1px dashed var(--md-sys-color-outline-variant);
  gap: 16px;
}

.m3-detail-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--md-sys-color-on-surface-variant);
  flex-shrink: 0;
}

.m3-detail-label .material-symbols-outlined {
  font-size: 18px;
  color: var(--md-sys-color-outline);
}

.m3-detail-value {
  font-size: 13.5px;
  font-weight: 500;
  color: var(--md-sys-color-on-surface);
  text-align: right;
  word-break: break-all;
}

.m3-detail-value.font-mono {
  font-family: var(--font-mono);
  font-size: 12px;
  background-color: var(--md-sys-color-surface-container-high);
  padding: 2px 6px;
  border-radius: 6px;
}

.m3-dialog-actions {
  padding: 16px 24px 24px 24px;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: 12px;
}

/* Confirmation Dialog */
.m3-dialog-confirm {
  max-width: 440px;
  padding: 24px;
  text-align: center;
  align-items: center;
}

.m3-confirm-icon-wrap {
  width: 52px;
  height: 52px;
  border-radius: 50%;
  background-color: var(--md-sys-color-error-container);
  color: var(--md-sys-color-error);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 16px;
}

.m3-confirm-icon-wrap .material-symbols-outlined {
  font-size: 28px;
}

.m3-dialog-confirm .m3-title-large {
  margin-bottom: 8px;
}

.m3-dialog-confirm .m3-body-medium {
  margin-bottom: 24px;
  text-align: center;
}

.m3-dialog-confirm .m3-dialog-actions {
  padding: 0;
  width: 100%;
  justify-content: center;
}

/* Snackbar */
.m3-snackbar {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background-color: #303030;
  color: #ffffff;
  padding: 12px 20px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  gap: 12px;
  box-shadow: var(--md-elevation-3);
  font-size: 13.5px;
  z-index: 200;
  opacity: 0;
  pointer-events: none;
  transition: all var(--md-motion-duration) var(--md-motion-easing);
}

.m3-snackbar.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
  pointer-events: auto;
}

.m3-snackbar-icon {
  color: #81c995;
  font-size: 20px;
}

/* Responsive adjustments */
@media (max-width: 640px) {
  .m3-main-container {
    padding: 16px 12px 48px 12px;
    gap: 16px;
  }
  .m3-pin-digit {
    width: 38px;
    height: 48px;
    font-size: 20px;
  }
  .m3-device-card {
    padding: 14px 16px;
    flex-direction: column;
    align-items: flex-start;
  }
  .m3-device-card-actions {
    width: 100%;
    justify-content: flex-end;
  }
  .m3-hero-banner {
    flex-direction: column;
    gap: 12px;
  }
}