:root {
  --bg: #0f0f1a;
  --bg-panel: #1a1a2e;
  --bg-input: #16213e;
  --bg-hover: #1f2b47;
  --text: #e0e0e0;
  --text-muted: #8892a4;
  --accent: #4fc3f7;
  --accent-dim: #2a6a8a;
  --green: #4caf50;
  --yellow: #ffb74d;
  --red: #ef5350;
  --border: #2a2a4a;
  --radius: 8px;
  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --brand: #AFA9EC;
  --mono: 'Cascadia Code', 'Fira Code', 'JetBrains Mono', monospace;
}

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

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  line-height: 1.5;
}

/* Header */
header {
  text-align: center;
  padding: 2rem 1rem 1rem;
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
}

.logo-icon {
  width: 72px;
  height: 56px;
  flex-shrink: 0;
}

.logo-text {
  display: flex;
  flex-direction: row;
  line-height: 1;
  font-family: 'Inter', sans-serif;
  letter-spacing: -0.04em;
}

.logo-ntag {
  font-size: 2.4rem;
  font-weight: 700;
  color: #f0effe;
}

.logo-onist {
  font-size: 2.4rem;
  font-weight: 300;
  color: var(--brand);
}


.subtitle {
  color: var(--text-muted);
  font-size: 0.9rem;
  margin-top: 0.25rem;
}

.github-link {
  display: inline-block;
  margin-top: 0.4rem;
  font-size: 0.8rem;
  color: var(--text-muted);
  text-decoration: none;
  transition: color 0.2s;
}

.github-link:hover {
  color: var(--text);
}

/* Small screens: compact logo */
@media (max-width: 790px) {
  .logo-icon {
    width: 36px;
    height: 28px;
  }

  .logo-ntag,
  .logo-onist {
    font-size: 1.4rem;
  }
}

/* Layout */
main {
  max-width: 1400px;
  margin: 0 auto;
  padding: 1rem;
  display: grid;
  gap: 1rem;
  grid-template-columns: 2fr 1fr;
}

.sidebar {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  position: sticky;
  top: 1rem;
  align-self: start;
}

@media (max-width: 790px) {
  main {
    grid-template-columns: 1fr;
  }
  .sidebar {
    position: static;
  }
}

/* Panels */
.panel {
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem;
}

/* Tab Bar */
.tab-bar {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--border);
  margin-bottom: 1.25rem;
}

.tab {
  flex: 1;
  padding: 0.6rem 1rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: color 0.2s, border-color 0.2s;
}

.tab:hover {
  color: var(--text);
}

.tab.active {
  color: var(--accent);
  border-bottom-color: var(--accent);
}

/* Forms */
.form-container {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.3rem;
}

.form-group--small {
  max-width: 280px;
}

.form-group--prefix {
  flex: 0 0 56px;
}

.form-group--lang {
  flex: 0 0 100px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-row {
  display: flex;
  gap: 0.75rem;
}

.form-row > .form-group {
  flex: 1;
}

.form-fieldset {
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.form-fieldset legend {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 0 0.5rem;
}

.advanced-section > .form-fieldset > legend {
  color: var(--accent);
}

.legacy-section > .form-fieldset > legend {
  color: var(--yellow);
}

input, textarea, select {
  background: var(--bg-input);
  border: 1px solid var(--border);
  border-radius: 6px;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  padding: 0.5rem 0.7rem;
  transition: border-color 0.2s, box-shadow 0.2s;
}

input:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(79, 195, 247, 0.15);
}

textarea {
  resize: vertical;
  min-height: 60px;
}

select {
  cursor: pointer;
}

/* Toggle switches */
.vcard-toggles {
  display: flex;
  gap: 1.25rem;
  margin-bottom: 1rem;
  align-items: center;
}

.toggle-label {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  font-size: 0.8rem;
  color: var(--text-muted);
  user-select: none;
}

.toggle-input {
  display: none;
}

.toggle-switch {
  width: 36px;
  height: 20px;
  background: var(--border);
  border-radius: 10px;
  position: relative;
  transition: background 0.2s;
  flex-shrink: 0;
}

.toggle-switch::after {
  content: '';
  position: absolute;
  top: 2px;
  left: 2px;
  width: 16px;
  height: 16px;
  background: var(--text-muted);
  border-radius: 50%;
  transition: transform 0.2s, background 0.2s;
}

.toggle-input:checked + .toggle-switch {
  background: var(--accent-dim);
}

.toggle-input:checked + .toggle-switch::after {
  transform: translateX(16px);
  background: var(--accent);
}

.legacy-toggle-wrap {
  display: none;
}

.show-advanced .legacy-toggle-wrap {
  display: flex;
}

/* Advanced/Legacy section visibility */
.advanced-section {
  display: none;
}

.show-advanced .advanced-section {
  display: block;
}

.legacy-section {
  display: none;
}

.show-legacy .legacy-section {
  display: block;
}

/* Advanced/Legacy options in select dropdowns */
.advanced-option {
  display: none;
}

.show-advanced .advanced-option {
  display: block;
}

.legacy-option {
  display: none;
}

.show-legacy .legacy-option {
  display: block;
}

/* Email type select hidden in basic mode (always INTERNET) */
select.email-type-select {
  display: none;
  width: 100px;
  flex-shrink: 0;
}

.show-advanced select.email-type-select {
  display: block;
}

/* Field hint text */
.field-hint {
  font-size: 0.75rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: 0.75rem;
  padding: 0.4rem 0.6rem;
  background: rgba(79, 195, 247, 0.05);
  border-left: 2px solid var(--accent-dim);
  border-radius: 0 4px 4px 0;
}

.field-hint strong {
  color: var(--text);
}

/* Label input (X-ABLabel) */
.label-input {
  width: 90px;
  flex: 0 0 90px;
  font-size: 0.8rem;
}

.label-input--full {
  width: 100%;
  flex: 1;
}

/* Inline form row (url + label side by side) */
.form-row-inline {
  display: flex;
  gap: 0.5rem;
  align-items: center;
}

.form-row-inline input[type="url"] {
  flex: 1;
}

.form-row-inline .label-input {
  flex: 0 0 140px;
  width: 140px;
}

/* Social profile custom service input */
.social-custom-input {
  display: none;
  flex: 0 0 120px;
  font-size: 0.85rem;
}

.social-custom-input.visible {
  display: block;
}

/* Dynamic rows (phones/emails) */
.dynamic-row {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  margin-bottom: 0.4rem;
}

.dynamic-row select {
  width: 90px;
  flex-shrink: 0;
}

.dynamic-row input {
  flex: 1;
}

.btn-remove-row {
  background: none;
  border: none;
  color: var(--red);
  font-size: 1.2rem;
  cursor: pointer;
  padding: 0.2rem 0.4rem;
  line-height: 1;
  border-radius: 4px;
  transition: background 0.2s;
}

.btn-remove-row:hover {
  background: rgba(239, 83, 80, 0.15);
}

.btn-add-row {
  background: none;
  border: 1px dashed var(--border);
  color: var(--accent);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.4rem 0.8rem;
  border-radius: 6px;
  transition: border-color 0.2s, background 0.2s;
}

.btn-add-row:hover {
  border-color: var(--accent);
  background: rgba(79, 195, 247, 0.05);
}

/* Password toggle */
.password-wrapper {
  display: flex;
  gap: 0.5rem;
}

.password-wrapper input {
  flex: 1;
}

.btn-toggle-pw {
  background: var(--bg-input);
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.75rem;
  cursor: pointer;
  padding: 0.4rem 0.6rem;
  border-radius: 6px;
  white-space: nowrap;
  transition: color 0.2s;
}

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

/* Output panel */
.output-row {
  display: flex;
  gap: 0.75rem;
  margin-bottom: 0.75rem;
}

.output-row .form-group {
  flex: 1;
}

/* Size indicator */
.size-indicator {
  margin-bottom: 1rem;
  opacity: 0;
  transition: opacity 0.3s;
}

.size-indicator.visible {
  opacity: 1;
}

.size-bar {
  height: 8px;
  background: var(--bg-input);
  border-radius: 4px;
  position: relative;
  margin-bottom: 1.2rem;
}

.size-bar-fill {
  height: 100%;
  border-radius: 4px;
  transition: width 0.3s, background-color 0.3s;
  width: 0;
  position: relative;
  z-index: 1;
}

.size-bar-fill.ok { background: var(--green); }
.size-bar-fill.warn { background: var(--yellow); }
.size-bar-fill.over { background: var(--red); }

.size-marker {
  position: absolute;
  top: 0;
  width: 1px;
  height: 100%;
  background: var(--text-muted);
  opacity: 0.5;
  z-index: 2;
}

.size-marker-end {
  background: none;
}

.size-marker-label {
  position: absolute;
  top: 12px;
  left: 50%;
  transform: translateX(-50%);
  font-size: 0.6rem;
  color: var(--text-muted);
  white-space: nowrap;
}

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

/* Error */
.error-display {
  color: var(--red);
  font-size: 0.85rem;
  margin-bottom: 0.75rem;
  display: none;
}

.error-display.visible {
  display: block;
}

/* Buttons */
.action-buttons {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin-bottom: 1rem;
}

.btn {
  padding: 0.6rem 1.2rem;
  border: none;
  border-radius: 6px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.2s, opacity 0.2s;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--accent);
  color: #0a0a15;
}

.btn-primary:hover:not(:disabled) {
  background: #67d0fa;
}

.btn-download {
  background: var(--green);
  color: #fff;
}

.btn-download:hover:not(:disabled) {
  background: #66bb6a;
}

.btn-save {
  background: #7c4dff;
  color: #fff;
}

.btn-save:hover:not(:disabled) {
  background: #9e7aff;
}

.btn-small {
  padding: 0.35rem 0.7rem;
  font-size: 0.8rem;
  background: var(--accent-dim);
  color: var(--text);
  border-radius: 6px;
}

.btn-small:hover {
  background: var(--accent);
  color: #0a0a15;
}

.btn-link {
  background: none;
  border: none;
  color: var(--accent);
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0;
  text-decoration: underline;
  text-underline-offset: 2px;
}

.btn-link:hover {
  color: #67d0fa;
}

/* Hex preview */
.hex-section {
  margin-top: 0.5rem;
}

.hex-preview {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 6px;
  padding: 0.75rem;
  font-family: var(--mono);
  font-size: 0.72rem;
  line-height: 1.5;
  overflow-x: auto;
  max-height: 400px;
  overflow-y: auto;
  margin-top: 0.5rem;
  display: none;
}

.hex-preview.visible {
  display: block;
}

/* Profiles */
.profiles-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 0.75rem;
}

.profiles-header h2 {
  font-size: 1rem;
  font-weight: 600;
}

.profile-list {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

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

.profile-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0.5rem 0.6rem;
  background: var(--bg-input);
  border-radius: 6px;
  border: 1px solid var(--border);
}

.profile-info {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.profile-name {
  font-weight: 500;
  font-size: 0.85rem;
}

.profile-type {
  font-size: 0.7rem;
  color: var(--accent);
  background: rgba(79, 195, 247, 0.1);
  padding: 0.1rem 0.4rem;
  border-radius: 3px;
  text-transform: uppercase;
}

.profile-actions {
  display: flex;
  gap: 0.3rem;
}

.profile-actions button {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  font-size: 0.7rem;
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  cursor: pointer;
  transition: color 0.2s, border-color 0.2s;
}

.profile-actions button:hover {
  color: var(--text);
  border-color: var(--text-muted);
}

.profile-actions button[data-action="delete"]:hover {
  color: var(--red);
  border-color: var(--red);
}

/* vCard encoding mode selector */
.vcard-mode-selector {
  margin-bottom: 1rem;
}

.vcard-mode-options {
  display: flex;
  gap: 1.25rem;
  margin-top: 0.5rem;
}

.mode-label {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
}

.mode-label input[type="radio"] {
  accent-color: var(--accent);
}

/* Mobile: phones (~375px) */
@media (max-width: 480px) {
  /* Stack multi-column rows */
  .form-row {
    flex-direction: column;
  }
  .form-row > .form-group {
    flex: unset;
  }
  .form-group--prefix,
  .form-group--lang {
    flex: unset;
    max-width: unset;
  }
  .output-row {
    flex-direction: column;
  }
  .form-row-inline {
    flex-direction: column;
  }
  .form-row-inline input[type="url"] {
    width: 100%;
  }
  .form-row-inline .label-input {
    flex: unset;
    width: 100%;
  }

  /* Dynamic rows: grid card layout */
  .dynamic-row {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 0.35rem;
    padding: 0.5rem;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
  }
  .dynamic-row select {
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    width: auto;
    min-width: 70px;
    max-width: 160px;
  }
  .dynamic-row .btn-remove-row {
    grid-column: 2;
    grid-row: 1;
    justify-self: end;
    align-self: center;
    min-width: 44px;
    min-height: 44px;
  }
  .dynamic-row input {
    grid-column: 1 / -1;
    width: 100%;
  }
  .dynamic-row .label-input {
    grid-column: 1 / -1;
    width: 100%;
    flex: unset;
  }
  .dynamic-row .social-custom-input.visible {
    grid-column: 1 / -1;
    width: 100%;
    display: block;
  }
  .show-advanced .dynamic-row select.email-type-select {
    display: block;
    grid-column: 1;
    grid-row: 1;
    justify-self: start;
    width: auto;
  }

  /* Touch targets (44px minimum) */
  .btn {
    min-height: 44px;
    padding: 0.75rem 1.2rem;
  }
  .btn-remove-row {
    min-width: 44px;
    min-height: 44px;
  }
  .btn-add-row {
    min-height: 44px;
  }
  .profile-item {
    flex-wrap: wrap;
    position: relative;
  }
  .profile-info {
    flex: 1 1 100%;
    margin-bottom: 0.3rem;
  }
  .profile-type {
    position: absolute;
    top: 0.5rem;
    right: 0.6rem;
  }
  .profile-actions {
    flex: 1 1 100%;
  }
  .profile-actions button {
    min-height: 44px;
    padding: 0.4rem 0.75rem;
  }
  .tab {
    padding: 0.75rem 0.5rem;
    font-size: 0.8rem;
  }

  /* Small-screen polish */
  .panel {
    padding: 1rem;
  }
  .hex-preview {
    font-size: 0.65rem;
  }
  .vcard-toggles {
    flex-wrap: wrap;
  }
  .vcard-mode-options {
    flex-wrap: wrap;
  }
}