:root {
  --flasher-bg: #000;
  --flasher-surface: #0a0a0a;
  --flasher-border: rgba(255, 255, 255, 0.1);
  --flasher-text: #fff;
  --flasher-text-dim: #888;
  --flasher-accent: #fff;
  --flasher-success: #00ff80;
  --flasher-warning: #f39c12;
  --flasher-danger: #e74c3c;
  --flasher-info: #3498db;
  --flasher-radius: 12px;
  --flasher-font-mono: 'Share Tech Mono', 'Courier New', monospace;
  --flasher-font-sans: 'Space Grotesk', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
}

.flasher-page {
  padding-top: calc(var(--nav-height, 67px) + 1.75rem);
  min-height: 100vh;
}

.flasher-page .container {
  max-width: 960px;
  margin: 0 auto;
  padding: 0 1rem;
}

.flasher-header {
  text-align: center;
  margin-bottom: 2rem;
}

.flasher-header h2 {
  font-family: var(--flasher-font-sans);
  font-weight: 600;
  font-size: 2rem;
  color: var(--flasher-text);
  margin-bottom: 0.5rem;
  letter-spacing: -0.5px;
}

.flasher-header p {
  color: var(--flasher-text-dim);
  font-size: 0.95rem;
}

/* Stepper */
.flasher-stepper {
  max-width: 500px;
  margin: 0 auto 2.5rem auto;
}

.flasher-stepper-track {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  position: relative;
  gap: 0.75rem;
  align-items: start;
}

.flasher-stepper-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.4rem;
  text-align: center;
  width: max-content;
  justify-self: center;
}

.flasher-step-dot {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: transparent;
  border: 1px solid var(--flasher-border);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 500;
  font-size: 0.85rem;
  color: var(--flasher-text-dim);
  transition: all 0.3s ease;
  position: relative;
  z-index: 5;
  flex-shrink: 0;
  justify-self: center;
}

.flasher-stepper-track::before {
  content: '';
  position: absolute;
  top: 16px;
  left: calc(100% / 6 + 16px);
  right: calc(100% / 6 + 16px);
  height: 1px;
  background: var(--flasher-border);
  z-index: 1;
}

.flasher-step-dot.active {
  background: var(--flasher-text);
  border-color: var(--flasher-text);
  color: #000;
}

.flasher-step-dot.completed {
  background: transparent;
  border-color: var(--flasher-success);
  color: var(--flasher-success);
}

.flasher-stepper-item span {
  display: block;
  font-size: 0.75rem;
  color: var(--flasher-text-dim);
  text-align: center;
  font-family: var(--flasher-font-mono);
  letter-spacing: 0.02em;
}

nav ul.flasher-nav-links {
  margin: 0 !important;
  margin-top: 0 !important;
  margin-bottom: 0 !important;
  padding: 0 !important;
  list-style: none;
  display: flex;
  align-items: center;
  height: auto;
}

nav ul.flasher-nav-links li {
  display: flex;
  align-items: center;
  margin: 0;
  padding: 0;
}

nav ul.flasher-nav-links li::marker {
  content: '';
}

nav ul.flasher-nav-links a {
  display: flex;
  align-items: center;
  line-height: 1;
}

nav ul.flasher-nav-links,
nav ul.flasher-nav-links li,
nav ul.flasher-nav-links a {
  transform: none;
}

nav ul.flasher-nav-links {
  padding: 0 !important;
}

/* Step containers */
.flasher-step {
  display: none;
  animation: flasherFadeIn 0.3s ease-in-out;
}

.flasher-step.active {
  display: block;
}

@keyframes flasherFadeIn {
  from { opacity: 0; transform: translateY(10px); }
  to { opacity: 1; transform: translateY(0); }
}

.flasher-step h3 {
  font-family: var(--flasher-font-sans);
  font-weight: 500;
  font-size: 1.35rem;
  margin-bottom: 0.25rem;
  color: var(--flasher-text);
}

.flusher-step-desc {
  color: var(--flasher-text-dim);
  font-size: 0.9rem;
  margin-bottom: 1.5rem;
}

/* Device cards grid */
.flasher-device-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.flasher-device-card {
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
  overflow: hidden;
}

.flasher-device-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: linear-gradient(45deg, rgba(255, 20, 147, 0.04), rgba(0, 255, 128, 0.03), rgba(255, 20, 147, 0.04));
  transform: translateX(-100%);
  transition: transform 0.8s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 0;
}

.flasher-device-card:hover::before {
  transform: translateX(100%);
}

.flasher-device-card:hover {
  border-color: rgba(255, 255, 255, 0.25);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(255, 255, 255, 0.06);
}

.flasher-device-card.selected {
  border-color: var(--flasher-success);
  background: rgba(0, 255, 128, 0.05);
  box-shadow: 0 0 15px rgba(0, 255, 128, 0.1);
}

.flasher-device-card.selected::before {
  transform: translateX(100%);
}

.flasher-device-name {
  font-weight: 600;
  font-size: 1rem;
  color: var(--flasher-text);
  margin-bottom: 0.35rem;
  position: relative;
  z-index: 1;
}

.flasher-device-desc {
  color: var(--flasher-text-dim);
  font-size: 0.8rem;
  margin-bottom: 0.75rem;
  position: relative;
  z-index: 1;
}

.flasher-device-meta {
  display: flex;
  gap: 1rem;
  position: relative;
  z-index: 1;
}

.flasher-device-meta span {
  font-size: 0.75rem;
  color: var(--flasher-text-dim);
  font-family: var(--flasher-font-mono);
}

/* Connection section */
.flasher-connection {
  max-width: 500px;
  margin-bottom: 1.5rem;
}

.flasher-status-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  margin-bottom: 1rem;
}

.flasher-status-bar.connected {
  border-color: var(--flasher-success);
  background: rgba(0, 255, 128, 0.03);
}

.flasher-status-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  flex-shrink: 0;
}

.flasher-status-dot.disconnected { background: var(--flasher-text-dim); }
.flasher-status-dot.connected { background: var(--flasher-success); }
.flasher-status-dot.flashing {
  background: var(--flasher-warning);
  animation: flasherPulse 1.5s infinite;
}

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

.flasher-status-label {
  font-size: 0.9rem;
  color: var(--flasher-text-dim);
}

.flasher-status-bar.connected .flasher-status-label {
  color: var(--flasher-success);
}

/* Buttons */
.flasher-btn {
  padding: 0.65rem 1.4rem;
  border-radius: var(--flasher-radius);
  font-weight: 500;
  font-size: 0.9rem;
  font-family: var(--flasher-font-sans);
  cursor: pointer;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  border: 1px solid transparent;
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  position: relative;
  overflow: hidden;
}

.flasher-btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
  box-shadow: none !important;
}

.flasher-btn-primary {
  background: var(--flasher-accent);
  color: #000;
  border-color: var(--flasher-accent);
}

.flasher-btn-primary:hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 4px 15px rgba(255, 255, 255, 0.2);
}

.flasher-btn-secondary {
  background: transparent;
  color: var(--flasher-text);
  border-color: var(--flasher-border);
}

.flasher-btn-secondary:hover:not(:disabled) {
  background: var(--flasher-surface);
  border-color: rgba(255, 255, 255, 0.25);
}

.flasher-btn-danger {
  background: transparent;
  color: var(--flasher-danger);
  border-color: var(--flasher-danger);
}

.flasher-btn-danger:hover:not(:disabled) {
  background: var(--flasher-danger);
  color: #fff;
}

.flasher-btn-help {
  background: transparent;
  color: var(--flasher-text-dim);
  border-color: var(--flasher-border);
  font-size: 0.85rem;
  padding: 0.5rem 1rem;
}

.flasher-btn-help:hover:not(:disabled) {
  color: var(--flasher-info);
  border-color: var(--flasher-info);
}

.flasher-btn-group {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.flasher-btn-lg {
  padding: 0.8rem 2rem;
  font-size: 1rem;
}

/* Navigation */
.flasher-nav {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 2rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--flasher-border);
}

.flasher-nav-right {
  display: flex;
  gap: 0.75rem;
  margin-left: auto;
}

/* Toggle buttons */
.flasher-toggle {
  display: flex;
  gap: 0.5rem;
  padding: 0.25rem;
  background: var(--flasher-surface);
  border-radius: 2rem;
  border: 1px solid var(--flasher-border);
  margin-bottom: 1rem;
}

.flasher-toggle-btn {
  flex: 1;
  padding: 0.5rem 1rem;
  border: none;
  border-radius: 2rem;
  background: transparent;
  color: var(--flasher-text-dim);
  font-size: 0.85rem;
  font-weight: 500;
  font-family: var(--flasher-font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
}

.flasher-toggle-btn:hover {
  color: var(--flasher-text);
}

.flasher-toggle-btn.active {
  background: rgba(255, 255, 255, 0.1);
  color: var(--flasher-text);
}

.flasher-toggle-btn.active-source {
  background: rgba(0, 255, 128, 0.1);
  color: var(--flasher-success);
}

/* Form elements */
.flasher-form-select,
.flasher-form-input {
  width: 100%;
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  color: var(--flasher-text);
  padding: 0.65rem 1rem;
  font-size: 0.9rem;
  font-family: var(--flasher-font-sans);
  transition: all 0.2s ease;
  appearance: auto;
}

.flasher-form-select:hover,
.flasher-form-input:hover {
  border-color: rgba(255, 255, 255, 0.2);
}

.flasher-form-select:focus,
.flasher-form-input:focus {
  outline: none;
  border-color: var(--flasher-text);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.1);
}

.flasher-form-select option {
  background: var(--flasher-surface);
  color: var(--flasher-text);
}

.flasher-form-label {
  font-size: 0.8rem;
  color: var(--flasher-text-dim);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  font-weight: 500;
  font-family: var(--flasher-font-mono);
  margin-bottom: 0.4rem;
  display: block;
}

.flasher-status-text {
  font-size: 0.85rem;
  color: var(--flasher-text-dim);
  min-height: 1.25rem;
  font-family: var(--flasher-font-mono);
}

.flasher-status-text.loading { color: var(--flasher-warning); }
.flasher-status-text.error { color: var(--flasher-danger); }
.flasher-status-text.success { color: var(--flasher-success); }

/* Firmware section */
.flasher-firmware-section {
  margin-bottom: 1.5rem;
}

.flasher-option-row {
  margin-bottom: 1rem;
}

/* File upload */
.flasher-upload-row {
  display: flex;
  gap: 1rem;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.flasher-address-input {
  flex: 0 0 120px;
}

.flasher-file-zone {
  flex: 1;
}

.flasher-file-drop {
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px dashed var(--flasher-border);
  border-radius: var(--flasher-radius);
  padding: 1.25rem;
  cursor: pointer;
  transition: all 0.2s ease;
  background: rgba(255, 255, 255, 0.02);
}

.flasher-file-drop:hover {
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.04);
}

.flasher-file-drop.uploaded {
  border-color: var(--flasher-success);
  border-style: solid;
  background: rgba(0, 255, 128, 0.03);
}

.flasher-file-drop span {
  font-size: 0.9rem;
  color: var(--flasher-text-dim);
}

.flasher-file-drop.uploaded span {
  color: var(--flasher-success);
}

.flasher-file-info {
  font-size: 0.8rem;
  color: var(--flasher-text-dim);
  margin-top: 0.4rem;
  font-family: var(--flasher-font-mono);
}

.flasher-file-badge {
  display: inline-block;
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--flasher-success);
  margin-left: 6px;
  box-shadow: 0 0 5px var(--flasher-success);
}

/* Settings card */
.flasher-settings {
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.flasher-settings-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0;
}

.flasher-settings-header h4 {
  font-size: 0.95rem;
  font-weight: 500;
  margin: 0;
}

.flasher-settings-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1rem;
  margin-top: 1rem;
}

@media (min-width: 769px) {
  .flasher-settings-grid {
    grid-template-columns: repeat(5, 1fr);
  }
}

.flasher-settings-grid .flasher-form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

/* Checkbox */
.flasher-checkbox {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 1rem;
  cursor: pointer;
}

.flasher-checkbox input[type="checkbox"] {
  width: 16px;
  height: 16px;
  accent-color: var(--flasher-text);
  cursor: pointer;
}

.flasher-checkbox label {
  font-size: 0.9rem;
  color: var(--flasher-text);
  cursor: pointer;
}

/* Flash summary */
.flasher-summary {
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  padding: 1.25rem;
  margin-bottom: 1rem;
}

.flasher-summary-item {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 0;
  font-size: 0.9rem;
  color: var(--flasher-text);
}

.flasher-summary-item i {
  color: var(--flasher-text-dim);
  font-size: 1rem;
  width: 20px;
  text-align: center;
}

/* Progress bar */
.flasher-progress {
  height: 6px;
  background: var(--flasher-surface);
  border-radius: 3px;
  overflow: hidden;
  margin-bottom: 0.5rem;
}

.flasher-progress-bar {
  height: 100%;
  background: var(--flasher-text);
  border-radius: 3px;
  transition: width 0.3s ease;
  width: 0%;
}

.flasher-progress-bar.complete {
  background: var(--flasher-success);
}

.flasher-eta {
  font-size: 0.8rem;
  color: var(--flasher-text-dim);
  text-align: right;
  font-family: var(--flasher-font-mono);
}

/* Global status */
.flasher-global-status {
  padding: 1rem;
  border-radius: var(--flasher-radius);
  margin-bottom: 1rem;
  font-size: 0.9rem;
  display: none;
}

.flasher-global-status.visible { display: block; }
.flasher-global-status.warning { background: rgba(243, 156, 18, 0.1); border: 1px solid rgba(243, 156, 18, 0.3); color: var(--flasher-warning); }
.flasher-global-status.error { background: rgba(231, 76, 60, 0.1); border: 1px solid rgba(231, 76, 60, 0.3); color: var(--flasher-danger); }
.flasher-global-status.success { background: rgba(0, 255, 128, 0.1); border: 1px solid rgba(0, 255, 128, 0.3); color: var(--flasher-success); }

/* Terminal */
.flasher-terminal-toggle {
  width: 100%;
  text-align: left;
  padding: 0.75rem 1rem;
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
  color: var(--flasher-text-dim);
  font-size: 0.85rem;
  font-family: var(--flasher-font-mono);
  cursor: pointer;
  transition: all 0.2s ease;
  margin-top: 2rem;
}

.flasher-terminal-toggle:hover {
  color: var(--flasher-text);
  border-color: rgba(255, 255, 255, 0.2);
}

.flasher-terminal {
  background: #000;
  border: 1px solid var(--flasher-border);
  border-top: none;
  border-radius: 0 0 var(--flasher-radius) var(--flasher-radius);
  padding: 1rem;
  height: 200px;
  overflow-y: auto;
  font-family: var(--flasher-font-mono);
  font-size: 0.8rem;
  color: var(--flasher-text-dim);
  line-height: 1.5;
  display: none;
}

.flasher-terminal.open {
  display: block;
}

.flasher-terminal::-webkit-scrollbar {
  width: 4px;
}

.flasher-terminal::-webkit-scrollbar-track {
  background: transparent;
}

.flasher-terminal::-webkit-scrollbar-thumb {
  background: var(--flasher-border);
  border-radius: 2px;
}

/* Advanced options */
.flasher-advanced summary {
  cursor: pointer;
  color: var(--flasher-text-dim);
  font-size: 0.85rem;
  padding: 0.5rem 0;
  font-family: var(--flasher-font-mono);
}

.flasher-advanced summary:hover {
  color: var(--flasher-text);
}

.flasher-advanced[open] summary {
  margin-bottom: 1rem;
}

.flasher-advanced-content {
  padding: 1rem;
  background: var(--flasher-surface);
  border: 1px solid var(--flasher-border);
  border-radius: var(--flasher-radius);
}

.flasher-option-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1rem;
}

/* Binary type toggle */
.flasher-binary-toggle {
  display: flex;
  gap: 0.5rem;
  margin-bottom: 1.25rem;
  padding: 0.25rem;
  background: var(--flasher-surface);
  border-radius: 2rem;
  border: 1px solid var(--flasher-border);
}

.flasher-binary-btn {
  flex: 1;
  text-align: center;
  border: none;
  border-radius: 2rem;
  padding: 0.5rem 0.75rem;
  color: var(--flasher-text-dim);
  background: transparent;
  font-size: 0.85rem;
  font-family: var(--flasher-font-sans);
  cursor: pointer;
  transition: all 0.2s ease;
}

.flasher-binary-btn:hover {
  color: var(--flasher-text);
}

.flasher-binary-btn.active {
  color: var(--flasher-text);
  font-weight: 500;
  background: rgba(255, 255, 255, 0.08);
}

/* Repo links */
.flasher-repo-links {
  margin-top: 0.5rem;
  display: flex;
  gap: 1rem;
}

.flasher-repo-links a {
  color: var(--flasher-text-dim);
  font-size: 0.8rem;
  text-decoration: none;
  font-family: var(--flasher-font-mono);
  transition: color 0.2s ease;
}

.flasher-repo-links a:hover {
  color: var(--flasher-text);
}

/* Hidden utility */
.flasher-hidden { display: none !important; }

/* Responsive */
@media (max-width: 768px) {
  .flasher-device-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .flasher-settings-grid {
    grid-template-columns: 1fr;
  }

  .flasher-upload-row {
    flex-direction: column;
  }

  .flasher-address-input {
    flex: 1;
  }

  .flasher-btn-group {
    flex-direction: column;
  }

  .flasher-toggle {
    flex-direction: column;
    border-radius: var(--flasher-radius);
  }

  .flasher-binary-toggle {
    flex-direction: column;
    border-radius: var(--flasher-radius);
  }

  .flasher-option-grid {
    grid-template-columns: 1fr;
  }

  .flasher-header h2 {
    font-size: 1.5rem;
  }
}

@media (max-width: 480px) {
  .flasher-device-grid {
    grid-template-columns: 1fr;
  }
}

/* Modal overrides for GhostESP theme */
.modal-content {
  background: var(--flasher-bg) !important;
  color: var(--flasher-text) !important;
  border: 1px solid var(--flasher-border) !important;
  border-radius: var(--flasher-radius) !important;
}

.modal-header {
  border-bottom: 1px solid var(--flasher-border) !important;
}

.modal-header .btn-close {
  filter: invert(1) grayscale(100%) brightness(200%);
}

.modal-title {
  color: var(--flasher-text) !important;
}

.modal-body {
  color: var(--flasher-text) !important;
}

.modal-body ul {
  list-style: none;
  padding-left: 1rem;
}

.modal-body li {
  margin-bottom: 0.5rem;
  color: var(--flasher-text-dim);
}

.modal-body li::before {
  content: "\2192";
  color: var(--flasher-text);
  font-weight: bold;
  display: inline-block;
  width: 1em;
  margin-left: -1em;
}

.modal-footer {
  border-top: 1px solid var(--flasher-border) !important;
}

.modal-backdrop {
  background: rgba(0, 0, 0, 0.8) !important;
}

/* Help diagram in modals */
.flasher-help-diagram {
  display: flex;
  justify-content: space-around;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
  padding: 1.25rem;
  background: var(--flasher-surface);
  border-radius: var(--flasher-radius);
  margin-top: 1rem;
  border: 1px solid var(--flasher-border);
}

.flasher-help-step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  min-width: 60px;
}

.flasher-help-step i {
  font-size: 2rem;
  color: var(--flasher-text);
  margin-bottom: 0.4rem;
}

.flasher-help-step p {
  font-size: 0.75rem;
  color: var(--flasher-text-dim);
  margin: 0;
  font-family: var(--flasher-font-mono);
}

.flasher-help-arrow {
  font-size: 1.2rem;
  color: var(--flasher-text-dim);
  flex-shrink: 0;
}