/* Theme variables -- dark (default) */
:root {
  --bg-primary:    #0e0e0e;
  --bg-secondary:  #181818;
  --bg-accent:     #242424;
  --bg-hover:      #2c2c2c;
  --text-primary:  #ffffff;
  --text-secondary:#e0e0e0;
  --text-muted:    #888888;
  --red:           #d32f2f;
  --red-light:     #ff4d4d;
  --border:        #333333;
  --error:         #f44336;
  --success:       #4caf50;
  --radius:        10px;
}

/* Theme variables -- light */
.light-mode {
  --bg-primary:    #f0f0f0;
  --bg-secondary:  #ffffff;
  --bg-accent:     #e8e8e8;
  --bg-hover:      #dcdcdc;
  --text-primary:  #1a1a1a;
  --text-secondary:#333333;
  --text-muted:    #777777;
  --red:           #c62828;
  --red-light:     #d32f2f;
  --border:        #d0d0d0;
  --error:         #c62828;
  --success:       #2e7d32;
}

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

body {
  font-family: 'Inter', 'SF Pro Display', system-ui, -apple-system, sans-serif;
  background: var(--bg-primary);
  color: var(--text-primary);
  padding: 20px 16px;
  max-width: 520px;
  margin: 0 auto;
  -webkit-font-smoothing: antialiased;
  transition: background .3s ease, color .3s ease;
}

/* Theme toggle button */
.theme-toggle {
  background: var(--bg-accent);
  border: 1px solid var(--border);
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  cursor: pointer;
  font-size: 1.1em;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background .2s, border-color .2s, color .2s;
  flex-shrink: 0;
  padding: 0;
  line-height: 1;
}
.theme-toggle:hover {
  background: var(--bg-hover);
  border-color: var(--red);
  color: var(--text-primary);
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 28px;
  padding: 16px 20px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
}
.header-brand {
  display: flex;
  align-items: center;
  gap: 0;
  user-select: none;
}
.brand-accent {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.5em;
  color: var(--red);
  letter-spacing: .04em;
}
.brand-text {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 700;
  font-size: 1.5em;
  color: var(--text-primary);
  letter-spacing: .04em;
}
.brand-sep {
  display: inline-block;
  width: 1px;
  height: 1.2em;
  background: var(--border);
  margin: 0 12px;
  vertical-align: middle;
  flex-shrink: 0;
}
.brand-sub {
  font-family: 'Inter', system-ui, sans-serif;
  font-weight: 400;
  font-size: .95em;
  color: var(--text-muted);
  letter-spacing: .06em;
  text-transform: uppercase;
}

/* Cards */
.card {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 16px;
  margin-bottom: 14px;
}
.card-title {
  font-size: .8em;
  text-transform: uppercase;
  letter-spacing: .1em;
  color: var(--text-muted);
  margin-bottom: 10px;
}

/* Info items */
.info-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 8px 0;
  font-size: .9em;
  border-bottom: 1px solid var(--border);
}
.info-item:last-of-type {
  border-bottom: none;
}
.info-label {
  color: var(--text-secondary);
  font-weight: 500;
}
.info-value {
  color: var(--text-muted);
  text-align: right;
}
.info-value.mono {
  font-family: 'Courier New', monospace;
}
.info-value.small {
  font-size: .85em;
}

/* Settings & Checkboxes */
.setting {
  display: flex;
  align-items: center;
  padding: 8px 0;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 12px;
  cursor: pointer;
  font-size: .9em;
  color: var(--text-secondary);
  user-select: none;
}
.checkbox-label input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  min-width: 22px;
  min-height: 22px;
  margin: 0;
  border: 2px solid var(--border);
  border-radius: 6px;
  background: var(--bg-primary);
  cursor: pointer;
  transition: border-color .2s ease, background .2s ease, box-shadow .2s ease;
}
.checkbox-label input[type="checkbox"]:hover {
  border-color: var(--text-muted);
}
.checkbox-label input[type="checkbox"]:checked {
  border-color: var(--red);
  background: var(--red);
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='white' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='20 6 9 17 4 12'%3E%3C/polyline%3E%3C/svg%3E");
  background-size: 14px 14px;
  background-position: center;
  background-repeat: no-repeat;
}
.checkbox-label input[type="checkbox"]:focus-visible {
  outline: none;
  box-shadow: 0 0 0 3px var(--bg-accent), 0 0 0 5px var(--red);
}
.checkbox-label input[type="checkbox"]:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}
.hint {
  font-size: .75em;
  color: var(--text-muted);
  margin: 4px 0 12px 0;
  font-style: italic;
}
.hint.small {
  margin-bottom: 0;
}

/* Buttons */
.btn {
  width: 100%;
  padding: 10px 16px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: .85em;
  cursor: pointer;
  font-weight: 500;
  transition: background .2s, border-color .2s, color .2s;
  text-transform: uppercase;
  letter-spacing: .05em;
  margin-top: 8px;
}

.btn-primary {
  background: transparent;
  color: var(--red);
  border-color: var(--red);
}
.btn-primary:hover {
  background: var(--red);
  color: white;
}

.btn-secondary {
  background: var(--bg-accent);
  color: var(--text-primary);
  border-color: var(--border);
}
.btn-secondary:hover {
  background: var(--bg-hover);
  border-color: var(--red);
}

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

/* Progress */
.progress-bar {
  width: 100%;
  height: 8px;
  background: var(--bg-accent);
  border-radius: 6px;
  overflow: hidden;
  margin: 8px 0;
}

.progress-fill {
  height: 100%;
  width: 0%;
  background: var(--red);
  border-radius: 6px;
  transition: width .3s ease;
}

/* Log box */
.log-box {
  background: var(--bg-primary);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 8px;
  margin-top: 8px;
}

.log-content {
  font-family: 'Courier New', monospace;
  font-size: .7em;
  color: var(--red-light);
  max-height: 250px;
  overflow-y: auto;
  white-space: pre-wrap;
  word-wrap: break-word;
  line-height: 1.4;
}

.log-content::-webkit-scrollbar {
  width: 6px;
}
.log-content::-webkit-scrollbar-track {
  background: var(--bg-accent);
}
.log-content::-webkit-scrollbar-thumb {
  background: var(--red);
  border-radius: 3px;
}

/* Result message (inside modal) */
.result-message {
  padding: 8px 0;
  margin: 0;
  font-size: .95em;
  color: var(--text-secondary);
}
.result-message.error {
  color: var(--error);
}

/* Modal overlay */
.modal-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 1000;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: modalFadeIn 0.2s ease;
}
.modal-overlay[aria-hidden="false"] {
  display: flex;
}
@keyframes modalFadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.modal-dialog {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 400px;
  width: 100%;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.4);
  animation: modalSlideIn 0.25s ease;
}
@keyframes modalSlideIn {
  from { transform: scale(0.95); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}
.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--border);
}
.modal-title {
  font-size: 1em;
  font-weight: 600;
  margin: 0;
  display: flex;
  align-items: center;
  gap: 6px;
}
.modal-title .result-icon.success-icon { color: var(--success); }
.modal-title .result-icon.error-icon { color: var(--error); }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5em;
  line-height: 1;
  cursor: pointer;
  padding: 0 4px;
  border-radius: 4px;
}
.modal-close:hover {
  color: var(--text-primary);
  background: var(--bg-accent);
}
.modal-body {
  padding: 16px;
}
.modal-footer {
  padding: 12px 16px;
  border-top: 1px solid var(--border);
}

/* Flash button row (esp-web-tools) */
.flash-button-row {
  margin-top: 4px;
}
.flash-button-row esp-web-install-button {
  display: block;
}
.flash-button-row esp-web-install-button .btn {
  margin-top: 0;
}

/* Footer */
.footer {
  text-align: center;
  padding: 20px 0;
  font-size: .75em;
  color: var(--text-muted);
}
.footer-brand {
  text-transform: uppercase;
  letter-spacing: .1em;
  margin-bottom: 6px;
}
.footer-copy {
  font-size: .95em;
  text-transform: none;
  letter-spacing: 0;
}
.footer a {
  color: var(--red);
  text-decoration: none;
  transition: color .2s ease;
}
.footer a:hover {
  color: var(--red-light);
  text-decoration: underline;
}

/* Material Icons */
.material-icons {
  font-family: 'Material Icons';
  font-weight: normal;
  font-style: normal;
  font-size: 24px;
  display: inline-block;
  line-height: 1;
  text-transform: none;
  letter-spacing: normal;
  word-wrap: normal;
  white-space: nowrap;
  direction: ltr;
  vertical-align: middle;
}

.material-icons.icon-inline {
  font-size: 1em;
  vertical-align: -0.15em;
  margin-right: 0.3em;
}

.material-icons.icon-small {
  font-size: 0.9em;
  vertical-align: -0.1em;
  margin-right: 0.25em;
}