/* Bitcoin OP_RETURN Message App - Styles */

/* CSS Reset and Base Styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

:root {
  /* Colors */
  --color-primary: #f7931a;
  --color-primary-dark: #d67a14;
  --color-secondary: #4a4a4a;
  --color-success: #28a745;
  --color-error: #dc3545;
  --color-warning: #ffc107;
  --color-info: #17a2b8;
  --color-testnet: #ff9800;

  /* Grays */
  --color-bg: #f5f5f5;
  --color-bg-light: #ffffff;
  --color-bg-dark: #2c2c2c;
  --color-text: #333333;
  --color-text-light: #666666;
  --color-text-muted: #999999;
  --color-border: #dddddd;

  /* Spacing */
  --spacing-xs: 0.25rem;
  --spacing-sm: 0.5rem;
  --spacing-md: 1rem;
  --spacing-lg: 1.5rem;
  --spacing-xl: 2rem;
  --spacing-xxl: 3rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 20px rgba(0, 0, 0, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu',
    'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
}

code {
  font-family: 'SF Mono', Monaco, 'Cascadia Code', 'Roboto Mono', Consolas, 'Courier New',
    monospace;
  background-color: #f4f4f4;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  font-size: 0.9em;
}

/* Network Banner */
.network-banner {
  background: linear-gradient(135deg, var(--color-testnet), #ff5722);
  color: white;
  text-align: center;
  padding: var(--spacing-md);
  font-weight: 600;
  font-size: 1.1rem;
  box-shadow: var(--shadow-md);
  position: sticky;
  top: 0;
  z-index: 100;
}

.banner-icon {
  font-size: 1.2rem;
  margin: 0 var(--spacing-sm);
}

/* Container */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: var(--spacing-xl);
}

/* Header */
.header {
  text-align: center;
  margin-bottom: var(--spacing-xxl);
}

.title {
  font-size: 2.5rem;
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--spacing-sm);
}

.subtitle {
  font-size: 1.2rem;
  color: var(--color-text-light);
}

/* Main Content */
.main-content {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-xl);
}

/* Section Styles */
section {
  background: var(--color-bg-light);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--shadow-md);
}

section h2 {
  font-size: 1.5rem;
  margin-bottom: var(--spacing-lg);
  color: var(--color-secondary);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

section h3 {
  font-size: 1.2rem;
  margin-bottom: var(--spacing-md);
  color: var(--color-text);
}

/* Wallet Section */
.wallet-buttons {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--spacing-md);
  margin-top: var(--spacing-lg);
}

.wallet-button {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-size: 1rem;
  font-weight: 600;
  color: var(--color-text);
}

.wallet-button:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  border-color: var(--color-primary);
}

.wallet-button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.wallet-button.unavailable {
  opacity: 0.3;
}

.wallet-button img {
  width: 48px;
  height: 48px;
}

/* Wallet Status */
.wallet-status {
  margin-top: var(--spacing-lg);
}

.wallet-connected {
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.connected-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
}

.balance-info {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin-bottom: var(--spacing-md);
  padding: var(--spacing-sm) 0;
}

.balance-label {
  font-weight: 600;
  color: var(--color-text);
}

.balance-display {
  background: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-text);
}

.status-indicator {
  width: 12px;
  height: 12px;
  border-radius: 50%;
  background-color: var(--color-success);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0%, 100% {
    opacity: 1;
  }
  50% {
    opacity: 0.5;
  }
}

.connected-label {
  font-weight: 600;
  color: var(--color-text);
}

.address-display {
  background: white;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  font-family: monospace;
  font-size: 0.9rem;
}

.wallet-status.connected .wallet-connect {
  display: none;
}

.wallet-status.disconnected .wallet-connected {
  display: none !important;
}

.wallet-status.connected .wallet-connected {
  display: block;
}

.no-wallet-warning {
  background: #fff3cd;
  border: 2px solid var(--color-warning);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  text-align: center;
}

.install-link {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin: var(--spacing-xs);
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.install-link:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
}

/* Two-Column Message + Payment Layout */
.message-payment-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--spacing-xl);
  align-items: start;
}

.message-payment-row .message-section,
.message-payment-row .payment-section {
  margin: 0;
}

/* Payment Section */
.payment-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.fee-priority-buttons {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-sm);
  margin-top: var(--spacing-sm);
}

.fee-priority-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  padding: var(--spacing-md) var(--spacing-sm);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  font-family: inherit;
}

.fee-priority-btn:hover {
  border-color: var(--color-primary);
  transform: translateY(-1px);
  box-shadow: var(--shadow-sm);
}

.fee-priority-btn.active {
  border-color: var(--color-primary);
  background: #fff8f0;
  box-shadow: var(--shadow-sm);
}

.priority-icon {
  font-size: 1.4rem;
}

.priority-label {
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--color-text);
}

.priority-sub {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.payment-summary {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.summary-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: var(--spacing-xs) 0;
  border-bottom: 1px solid var(--color-border);
}

.summary-row:last-child {
  border-bottom: none;
}

.summary-row.summary-total {
  border-top: 2px solid var(--color-border);
  margin-top: var(--spacing-xs);
  padding-top: var(--spacing-sm);
  font-size: 1.05rem;
}

.summary-label {
  font-weight: 600;
  color: var(--color-text-light);
  font-size: 0.9rem;
}

.summary-value {
  font-family: monospace;
  font-weight: 600;
  color: var(--color-text);
  font-size: 0.9rem;
}

.summary-total .summary-label,
.summary-total .summary-value {
  color: var(--color-text);
  font-weight: 700;
}

.payment-balance-check {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.balance-check-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.payment-status-indicator {
  margin-top: var(--spacing-sm);
  font-size: 0.85rem;
  font-weight: 600;
}

.payment-status-indicator.sufficient {
  color: var(--color-success);
}

.payment-status-indicator.insufficient {
  color: var(--color-error);
}

.payment-note {
  background: #fff8e1;
  border: 1px solid var(--color-warning);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
}

.payment-note p {
  font-size: 0.85rem;
  color: #7a5a00;
  margin: 0;
}

/* Payment Method Tabs */
.payment-method-tabs {
  display: flex;
  gap: var(--spacing-sm);
  border-bottom: 2px solid var(--color-border);
  padding-bottom: var(--spacing-sm);
}

.payment-method-tab {
  flex: 1;
  padding: var(--spacing-sm) var(--spacing-md);
  background: var(--color-bg);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md) var(--radius-md) 0 0;
  cursor: pointer;
  font-size: 0.9rem;
  font-weight: 600;
  font-family: inherit;
  color: var(--color-text-light);
  transition: all var(--transition-fast);
}

.payment-method-tab.active {
  background: white;
  border-color: var(--color-primary);
  border-bottom-color: white;
  color: var(--color-primary);
  margin-bottom: -2px;
}

/* Stripe Card Element */
.stripe-card-element {
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  background: white;
  transition: border-color var(--transition-fast);
}

.stripe-card-element:focus-within {
  border-color: var(--color-primary);
}

.card-error {
  color: var(--color-error);
  font-size: 0.875rem;
  font-weight: 600;
  padding: var(--spacing-sm) 0;
}

.gift-toggle-wrap {
  margin-bottom: var(--spacing-sm);
}

.gift-toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  color: var(--color-text-muted);
  cursor: pointer;
  user-select: none;
}

.gift-toggle-label input[type="checkbox"] {
  accent-color: var(--color-primary);
  width: 1rem;
  height: 1rem;
  flex-shrink: 0;
}

.terms-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  margin-bottom: var(--spacing-sm);
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.4;
}

.terms-checkbox input[type="checkbox"] {
  margin-top: 0.15rem;
  flex-shrink: 0;
  accent-color: var(--color-primary);
  width: 1rem;
  height: 1rem;
  cursor: pointer;
}

.terms-link {
  color: var(--color-primary);
  text-decoration: underline;
}

.card-submit-btn {
  width: 100%;
  margin-top: var(--spacing-sm);
  font-size: 1.05rem;
}

.card-note {
  font-size: 0.78rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: var(--spacing-sm);
  margin-bottom: 0;
}

/* Responsive: stack on smaller screens */
@media (max-width: 768px) {
  .message-payment-row {
    grid-template-columns: 1fr;
  }
}

/* Message Form */
.message-form {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-lg);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.form-group label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: 600;
  color: var(--color-text);
}

.byte-counter {
  font-size: 0.9rem;
  font-weight: normal;
  color: var(--color-text-light);
}

.byte-counter.error {
  color: var(--color-error);
  font-weight: 600;
}

.message-input {
  width: 100%;
  padding: var(--spacing-md);
  border: 2px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color var(--transition-fast);
}

.message-input:focus {
  outline: none;
  border-color: var(--color-primary);
}

.input-hint {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  font-style: italic;
}

.message-preview {
  display: block;
  padding: var(--spacing-md);
  background: #f8f8f8;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  font-size: 0.85rem;
  word-break: break-all;
  min-height: 40px;
  color: var(--color-text-light);
}

/* Buttons */
.button {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: 1rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-normal);
  text-align: center;
}

.button-primary {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: white;
  box-shadow: var(--shadow-sm);
}

.button-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.button-primary:disabled {
  background: #cccccc;
  cursor: not-allowed;
  transform: none;
}

.button-secondary {
  background: white;
  color: var(--color-text);
  border: 2px solid var(--color-border);
}

.button-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.icon-button {
  background: none;
  border: none;
  font-size: 1.2rem;
  cursor: pointer;
  padding: var(--spacing-xs);
  opacity: 0.7;
  transition: opacity var(--transition-fast);
}

.icon-button:hover {
  opacity: 1;
}

/* Transaction Status */
.progress-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin: var(--spacing-xl) 0;
  position: relative;
}

.progress-container::before {
  content: '';
  position: absolute;
  top: 20px;
  left: 10%;
  right: 10%;
  height: 3px;
  background: var(--color-border);
  z-index: 0;
}

.progress-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  flex: 1;
  position: relative;
  z-index: 1;
}

.step-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: var(--color-bg);
  border: 3px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  transition: all var(--transition-normal);
}

.progress-step.active .step-icon {
  background: var(--color-primary);
  border-color: var(--color-primary);
  color: white;
  animation: spin 2s linear infinite;
}

.progress-step.completed .step-icon {
  background: var(--color-success);
  border-color: var(--color-success);
  color: white;
}

@keyframes spin {
  0% {
    transform: rotate(0deg);
  }
  100% {
    transform: rotate(360deg);
  }
}

.step-label {
  font-size: 0.85rem;
  color: var(--color-text-light);
  font-weight: 600;
}

.status-message {
  text-align: center;
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--color-text);
  padding: var(--spacing-lg);
}

.tx-result {
  background: linear-gradient(135deg, #e8f5e9, #c8e6c9);
  border: 2px solid var(--color-success);
  border-radius: var(--radius-md);
  padding: var(--spacing-xl);
  margin-top: var(--spacing-lg);
  text-align: center;
}

.tx-result h3 {
  color: var(--color-success);
  margin-bottom: var(--spacing-lg);
}

.tx-info {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  flex-wrap: wrap;
  margin: var(--spacing-md) 0;
}

.tx-label {
  font-weight: 600;
}

.tx-link {
  color: var(--color-primary);
  text-decoration: none;
  font-family: monospace;
  font-weight: 600;
}

.tx-link:hover {
  text-decoration: underline;
}

.tx-explorer-hint {
  font-size: 0.9rem;
  color: var(--color-text-light);
  margin-top: var(--spacing-md);
}

.error-message {
  background: #f8d7da;
  border: 2px solid var(--color-error);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
  margin-top: var(--spacing-lg);
  color: #721c24;
  opacity: 0;
  transition: opacity var(--transition-normal);
}

.error-message.show {
  opacity: 1;
}

/* Info Section */
.info-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--spacing-lg);
  margin-top: var(--spacing-lg);
}

.info-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--spacing-lg);
}

.info-card h3 {
  color: var(--color-primary);
  margin-bottom: var(--spacing-md);
}

.info-card p {
  color: var(--color-text-light);
  line-height: 1.6;
}

.faucet-links {
  display: flex;
  flex-direction: column;
  gap: var(--spacing-sm);
}

.faucet-link {
  display: block;
  padding: var(--spacing-sm) var(--spacing-md);
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--color-text);
  transition: all var(--transition-fast);
}

.faucet-link:hover {
  border-color: var(--color-primary);
  transform: translateX(4px);
}

.fee-estimate {
  font-size: 0.9rem;
}

.fee-option {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
}

.fee-option:last-child {
  border-bottom: none;
}

.fee-label {
  color: var(--color-text-light);
}

.fee-value {
  font-weight: 600;
  font-family: monospace;
  color: var(--color-text);
}

/* Footer */
.footer {
  text-align: center;
  padding: var(--spacing-xxl) 0;
  color: var(--color-text-light);
}

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

.footer a:hover {
  text-decoration: underline;
}

.testnet-warning {
  margin-top: var(--spacing-md);
  font-weight: 600;
  color: var(--color-testnet);
}

/* Toast Notifications */
.toast {
  position: fixed;
  bottom: var(--spacing-xl);
  right: var(--spacing-xl);
  padding: var(--spacing-md) var(--spacing-xl);
  background: var(--color-bg-dark);
  color: white;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  z-index: 1000;
  opacity: 0;
  transform: translateY(20px);
  transition: all var(--transition-normal);
}

.toast.show {
  opacity: 1;
  transform: translateY(0);
}

.toast.success {
  background: var(--color-success);
}

.toast.error {
  background: var(--color-error);
}

.toast.info {
  background: var(--color-info);
}

/* Loading Spinner */
.loading-spinner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.5);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 2000;
}

.spinner {
  width: 50px;
  height: 50px;
  border: 4px solid rgba(255, 255, 255, 0.3);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

/* Responsive Design */
@media (max-width: 768px) {
  .container {
    padding: var(--spacing-md);
  }

  .title {
    font-size: 2rem;
  }

  .subtitle {
    font-size: 1rem;
  }

  section {
    padding: var(--spacing-lg);
  }

  .wallet-buttons {
    grid-template-columns: 1fr;
  }

  .progress-container {
    flex-wrap: wrap;
  }

  .progress-step {
    flex-basis: 50%;
    margin-bottom: var(--spacing-lg);
  }

  .toast {
    right: var(--spacing-md);
    left: var(--spacing-md);
  }

  .info-grid {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 480px) {
  .title {
    font-size: 1.5rem;
  }

  .network-banner {
    font-size: 0.9rem;
    padding: var(--spacing-sm);
  }

  .connected-info {
    flex-direction: column;
    align-items: flex-start;
  }
}

/* Fee rows in the info section (populated by stripe-payment.js) */
.fee-row {
  display: flex;
  justify-content: space-between;
  padding: var(--spacing-sm) 0;
  border-bottom: 1px solid var(--color-border);
  font-size: 0.9rem;
}

.fee-row:last-child {
  border-bottom: none;
}

.fee-priority-name {
  color: var(--color-text-light);
}

.fee-amount {
  font-weight: 600;
  color: var(--color-text);
}

/* Embedded Stripe Checkout section */
.checkout-section {
  margin-top: var(--spacing-xl);
}

.checkout-section h2 {
  margin-bottom: var(--spacing-md);
}

#embedded-checkout {
  /* Stripe injects an iframe here — let it breathe */
  min-height: 300px;
}