/* Material Design 3 Custom Styles - Blue Theme */
:root {
  /* Blue Color Palette */
  --md-sys-color-primary: #1976D2;
  --md-sys-color-on-primary: #ffffff;
  --md-sys-color-primary-container: #BBDEFB;
  --md-sys-color-on-primary-container: #0D47A1;
  --md-sys-color-secondary: #455A64;
  --md-sys-color-on-secondary: #ffffff;
  --md-sys-color-secondary-container: #CFD8DC;
  --md-sys-color-on-secondary-container: #263238;
  --md-sys-color-tertiary: #0277BD;
  --md-sys-color-on-tertiary: #ffffff;
  --md-sys-color-tertiary-container: #B3E5FC;
  --md-sys-color-on-tertiary-container: #01579B;
  --md-sys-color-error: #D32F2F;
  --md-sys-color-on-error: #ffffff;
  --md-sys-color-error-container: #FFCDD2;
  --md-sys-color-on-error-container: #B71C1C;
  --md-sys-color-background: #FAFAFA;
  --md-sys-color-on-background: #212121;
  --md-sys-color-surface: #ffffff;
  --md-sys-color-on-surface: #212121;
  --md-sys-color-surface-variant: #ECEFF1;
  --md-sys-color-on-surface-variant: #546E7A;
  --md-sys-color-outline: #90A4AE;
  --md-sys-color-outline-variant: #B0BEC5;
  --md-sys-color-shadow: #000000;
  --md-sys-color-surface-tint: #1976D2;

  /* Token Box Specific Variables */
  --token-box-size: 52px;
  --token-box-gap: 12px;
  --token-box-radius: 12px;
  --token-box-border-default: #B0BEC5;
  --token-box-border-focus: #1976D2;
  --token-box-bg-default: #ffffff;
  --token-box-bg-filled: #E3F2FD;
  --token-box-shadow-focus: 0 0 0 3px rgba(25, 118, 210, 0.2);
  --token-success-color: #4CAF50;
  --token-success-bg: #E8F5E9;
}

* {
  box-sizing: border-box;
}

body {
  font-family: 'Roboto', sans-serif;
  margin: 0;
  padding: 0;
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.5;
}

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

.main-content {
  flex: 1;
  padding: 24px;
  padding-top: 88px; /* 64px (top app bar) + 24px (spacing) */
  max-width: 640px;
  margin: 0 auto;
  width: 100%;
}

.content-section {
  margin-bottom: 32px;
}

/* Top App Bar */
.mdc-top-app-bar {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.mdc-top-app-bar__title {
  font-weight: 500;
  font-size: 22px;
}

/* Cards */
.mdc-card {
  background-color: var(--md-sys-color-surface);
  color: var(--md-sys-color-on-surface);
  border-radius: 16px;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.12), 0 1px 2px rgba(0, 0, 0, 0.24);
  transition: box-shadow 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mdc-card:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12), 0 2px 4px rgba(0, 0, 0, 0.08);
}

.card-content {
  padding: 24px;
}

/* Token Input Card with Background Decoration */
.token-card {
  margin-bottom: 24px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #ffffff 0%, #E3F2FD 100%);
}

.token-card::before {
  content: '';
  position: absolute;
  top: -50%;
  right: -50%;
  width: 100%;
  height: 100%;
  background: radial-gradient(circle, rgba(25, 118, 210, 0.08) 0%, transparent 70%);
  pointer-events: none;
}

.token-card::after {
  content: '';
  position: absolute;
  bottom: -30%;
  left: -30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(25, 118, 210, 0.05) 0%, transparent 60%);
  pointer-events: none;
}

.token-card .card-content {
  position: relative;
  z-index: 1;
}

.token-card .card-content h2 {
  text-align: center;
}

.token-description {
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 24px;
  text-align: center;
}

.token-input-container {
  margin-bottom: 16px;
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* Token Boxes Wrapper */
.token-boxes-wrapper {
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
}

.token-boxes {
  display: flex;
  gap: var(--token-box-gap);
  justify-content: center;
}

/* Individual Token Box */
.token-box {
  width: var(--token-box-size);
  height: var(--token-box-size);
  border: 2px solid var(--token-box-border-default);
  border-radius: var(--token-box-radius);
  background-color: var(--token-box-bg-default);
  font-size: 24px;
  font-weight: 600;
  text-align: center;
  text-transform: uppercase;
  color: var(--md-sys-color-on-surface);
  outline: none;
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  caret-color: var(--md-sys-color-primary);
}

.token-box::placeholder {
  color: transparent;
}

/* Focus State */
.token-box:focus {
  border-color: var(--token-box-border-focus);
  box-shadow: var(--token-box-shadow-focus);
  transform: scale(1.08);
  background-color: var(--token-box-bg-default);
}

/* Filled State */
.token-box.filled {
  background-color: var(--token-box-bg-filled);
  border-color: var(--md-sys-color-primary);
  animation: charAppear 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* Error State */
.token-box.error {
  border-color: var(--md-sys-color-error);
  background-color: var(--md-sys-color-error-container);
  animation: shake 0.4s ease-in-out;
}

/* Success State - All boxes filled */
.token-boxes.complete .token-box {
  border-color: var(--token-success-color);
  background-color: var(--token-success-bg);
}

/* Disabled State */
.token-box:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  background-color: var(--md-sys-color-surface-variant);
}

/* Completion Indicator */
.token-complete-indicator {
  position: absolute;
  right: -50px;
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transform: scale(0);
  transition: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.token-complete-indicator .material-icons {
  font-size: 36px;
  color: var(--token-success-color);
}

.token-complete-indicator.visible {
  opacity: 1;
  transform: scale(1);
  animation: checkBounce 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.token-complete-indicator.visible .material-icons {
  animation: pulse 1.5s ease-in-out infinite;
}

/* Token Helper Text */
.token-helper-text {
  text-align: center;
  font-size: 14px;
  color: var(--md-sys-color-on-surface-variant);
  margin-top: 16px;
  transition: color 0.2s ease;
}

.token-helper-text.error {
  color: var(--md-sys-color-error);
  font-weight: 500;
  padding: 12px 16px;
  background-color: var(--md-sys-color-error-container);
  border-radius: 8px;
  margin-top: 20px;
}

.token-helper-text.success {
  color: var(--token-success-color);
}

.mdc-text-field--filled {
  background-color: var(--md-sys-color-surface-variant);
}

.mdc-text-field--filled:not(.mdc-text-field--disabled) .mdc-floating-label {
  color: var(--md-sys-color-on-surface-variant);
}

/* Verification Status */
.verification-status {
  margin-top: 16px;
}

.mdc-linear-progress {
  --mdc-theme-primary: var(--md-sys-color-primary);
}

/* File Upload */
.upload-card, .uploaded-card {
  margin-top: 24px;
  position: relative;
  overflow: hidden;
  background: linear-gradient(135deg, #ffffff 0%, #E3F2FD 100%);
}

.upload-card::before {
  content: '';
  position: absolute;
  top: -30%;
  left: -30%;
  width: 60%;
  height: 60%;
  background: radial-gradient(circle, rgba(25, 118, 210, 0.06) 0%, transparent 70%);
  pointer-events: none;
}

.upload-card .card-content,
.uploaded-card .card-content {
  position: relative;
  z-index: 1;
}

.upload-card .card-content h2,
.uploaded-card .card-content h2 {
  text-align: center;
  color: var(--md-sys-color-primary);
}

.upload-card .card-content > p {
  text-align: center;
}

.file-upload-area {
  margin-top: 24px;
}

.upload-zone {
  border: 2px dashed var(--md-sys-color-primary);
  border-radius: 20px;
  padding: 48px 24px;
  text-align: center;
  background: linear-gradient(180deg, #ffffff 0%, #E3F2FD 100%);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  position: relative;
  overflow: hidden;
}

.upload-zone::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: radial-gradient(circle at center, rgba(25, 118, 210, 0.05) 0%, transparent 70%);
  pointer-events: none;
}

.upload-zone:hover {
  border-color: var(--md-sys-color-primary);
  background: linear-gradient(180deg, #E3F2FD 0%, #BBDEFB 100%);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(25, 118, 210, 0.15);
}

.upload-zone.drag-over {
  border-color: var(--md-sys-color-primary);
  border-style: solid;
  background: linear-gradient(180deg, #BBDEFB 0%, #90CAF9 100%);
  transform: scale(1.02);
  box-shadow: 0 12px 32px rgba(25, 118, 210, 0.25);
}

.upload-icon {
  font-size: 64px;
  color: var(--md-sys-color-primary);
  margin-bottom: 16px;
  display: block;
  animation: floatIcon 3s ease-in-out infinite;
}

@keyframes floatIcon {
  0%, 100% {
    transform: translateY(0);
  }
  50% {
    transform: translateY(-8px);
  }
}

.upload-zone h3 {
  margin: 0 0 8px 0;
  color: var(--md-sys-color-primary);
  font-weight: 500;
}

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

/* Upload Button */
.upload-zone .mdc-button--raised {
  background: linear-gradient(135deg, #1976D2 0%, #1565C0 100%);
  border-radius: 12px;
  padding: 0 24px;
  height: 44px;
  font-weight: 500;
  box-shadow: 0 4px 12px rgba(25, 118, 210, 0.3);
  transition: all 0.2s ease;
}

.upload-zone .mdc-button--raised:hover {
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(25, 118, 210, 0.4);
}

/* Upload Progress */
.upload-progress {
  padding: 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, #E3F2FD 0%, #BBDEFB 100%);
  border: 1px solid rgba(25, 118, 210, 0.2);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
  padding: 12px 16px;
  background-color: rgba(255, 255, 255, 0.7);
  border-radius: 12px;
}

.file-info .material-icons {
  color: var(--md-sys-color-primary);
  font-size: 32px;
}

.progress-text {
  text-align: center;
  margin-top: 12px;
  font-weight: 600;
  font-size: 18px;
  color: var(--md-sys-color-primary);
}

/* Already Uploaded / Completed Status */
.uploaded-status {
  text-align: center;
  padding: 24px 0;
}

.success-icon {
  font-size: 80px;
  color: var(--token-success-color);
  margin-bottom: 20px;
  display: block;
  animation: successPop 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes successPop {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

.uploaded-status h2 {
  color: var(--token-success-color) !important;
}

.file-info-display {
  margin-top: 24px;
  padding: 16px;
  background-color: var(--token-success-bg);
  border-radius: 12px;
  border: 1px solid rgba(76, 175, 80, 0.3);
}

/* Buttons */
.mdc-button--raised {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

.mdc-button--raised:hover {
  box-shadow: 0 4px 8px rgba(0, 0, 0, 0.12), 0 2px 4px rgba(0, 0, 0, 0.08);
}

/* Snackbar */
.mdc-snackbar {
  z-index: 1000;
  top: 16px;
  bottom: auto !important;
}

.mdc-snackbar--opening,
.mdc-snackbar--open,
.mdc-snackbar--closing {
  top: 16px;
  bottom: auto !important;
}

.mdc-snackbar__surface {
  background-color: var(--md-sys-color-tertiary);
  color: var(--md-sys-color-on-tertiary);
}

/* Snackbar type variations */
.snackbar-success .mdc-snackbar__surface {
  background-color: #4caf50;
  color: #ffffff;
}

.snackbar-error .mdc-snackbar__surface {
  background-color: var(--md-sys-color-error);
  color: var(--md-sys-color-on-error);
}

.snackbar-info .mdc-snackbar__surface {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
}

/* Responsive Design */
@media (max-width: 768px) {
  :root {
    --token-box-size: 44px;
    --token-box-gap: 8px;
  }

  .main-content {
    padding: 16px;
    padding-top: 80px; /* 64px (top app bar) + 16px (spacing) */
  }

  .card-content {
    padding: 16px;
  }

  .upload-zone {
    padding: 32px 16px;
  }

  .upload-icon {
    font-size: 40px;
  }

  .token-box {
    font-size: 20px;
  }

  .token-complete-indicator .material-icons {
    font-size: 28px;
  }

  .token-boxes-wrapper {
    flex-direction: column;
    gap: 12px;
  }
}

@media (max-width: 400px) {
  :root {
    --token-box-size: 40px;
    --token-box-gap: 6px;
  }

  .token-box {
    font-size: 18px;
  }
}

/* Animation for state transitions */
.fade-in {
  animation: fadeIn 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.fade-out {
  animation: fadeOut 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(16px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-16px);
  }
}

/* Token Box Animations */
@keyframes charAppear {
  0% {
    transform: scale(0.5);
    opacity: 0;
  }
  50% {
    transform: scale(1.15);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes checkBounce {
  0% {
    transform: scale(0);
    opacity: 0;
  }
  50% {
    transform: scale(1.2);
  }
  70% {
    transform: scale(0.9);
  }
  100% {
    transform: scale(1);
    opacity: 1;
  }
}

@keyframes pulse {
  0%, 100% {
    transform: scale(1);
    opacity: 1;
  }
  50% {
    transform: scale(1.1);
    opacity: 0.8;
  }
}

@keyframes shake {
  0%, 100% {
    transform: translateX(0);
  }
  20% {
    transform: translateX(-6px);
  }
  40% {
    transform: translateX(6px);
  }
  60% {
    transform: translateX(-4px);
  }
  80% {
    transform: translateX(4px);
  }
}

/* Error states */
.mdc-text-field--invalid .mdc-text-field__input {
  border-bottom-color: var(--md-sys-color-error);
}

.error-message {
  color: var(--md-sys-color-error);
  font-size: 12px;
  margin-top: 4px;
}

/* Success states */
.success-message {
  color: #4caf50;
  font-size: 12px;
  margin-top: 4px;
}

/* Disabled states */
.mdc-text-field--disabled {
  opacity: 0.6;
  pointer-events: none;
}

/* Guidance Section */
.guidance-section {
  margin-top: 24px;
  margin-bottom: 24px;
}

.guidance-card {
  border-left: 4px solid var(--md-sys-color-primary);
  background-color: var(--md-sys-color-primary-container);
}

.guidance-header {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 16px;
}

.guidance-icon {
  color: var(--md-sys-color-primary);
  font-size: 24px;
}

.guidance-header h3 {
  margin: 0;
  color: var(--md-sys-color-on-primary-container);
  font-weight: 500;
}

.guidance-content {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.guidance-item {
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.guidance-label {
  font-weight: 500;
  color: var(--md-sys-color-on-primary-container);
  min-width: 100px;
  flex-shrink: 0;
}

.guidance-value {
  color: var(--md-sys-color-on-primary-container);
  word-break: break-word;
  line-height: 1.4;
}

/* Guidance Message */
.guidance-message {
  margin-top: 16px;
  padding: 12px;
  background-color: rgba(255, 152, 0, 0.1);
  border: 1px solid rgba(255, 152, 0, 0.3);
  border-radius: 8px;
  display: flex;
  align-items: flex-start;
  gap: 8px;
}

.guidance-message-icon {
  color: #ff9800;
  font-size: 20px;
  margin-top: 2px;
  flex-shrink: 0;
}

.guidance-message-text {
  color: var(--md-sys-color-on-primary-container);
  font-size: 14px;
  line-height: 1.4;
  font-weight: 500;
}

/* Responsive guidance section */
@media (max-width: 768px) {
  .guidance-item {
    flex-direction: column;
    gap: 4px;
  }

  .guidance-label {
    min-width: auto;
  }

  .guidance-message {
    padding: 8px;
  }

  .guidance-message-text {
    font-size: 13px;
  }
}

/* Footer */
.site-footer {
  background-color: #E3F2FD;
  padding: 24px 16px;
  margin-top: auto;
}

.footer-content {
  max-width: 640px;
  margin: 0 auto;
  text-align: center;
}

.footer-company {
  font-size: 0.9rem;
  font-weight: 500;
  color: #37474F;
  margin-bottom: 8px;
}

.footer-info {
  font-size: 0.8rem;
  color: #546E7A;
  margin-bottom: 4px;
}

.footer-info p {
  margin: 0;
}

.footer-links {
  margin: 12px 0;
}

.footer-links a {
  color: var(--md-sys-color-primary);
  text-decoration: none;
  font-size: 0.85rem;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: #1565C0;
  text-decoration: underline;
}

.footer-links .divider {
  margin: 0 12px;
  color: #90A4AE;
}

.footer-copyright {
  font-size: 0.75rem;
  color: #78909C;
  margin-top: 8px;
}