:root {
  --bg-primary: #0a0a0a;
  --bg-secondary: #141414;
  --bg-tertiary: #1f1f1f;
  --bg-input: #0a0a0a;
  --text-primary: #fafafa;
  --text-secondary: #a3a3a3;
  --text-muted: #737373;
  --accent: #f59e0b;
  --accent-hover: #fbbf24;
  --border: #2a2a2a;
  --border-light: #1f1f1f;
  --error: #f85149;
  --success: #3fb950;
  --warning: #d29922;
  --code-bg: #1c2128;
  --sidebar-width: 260px;
  --header-height: 60px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
  --transition: 0.2s ease;
  --font-mono: 'SF Mono', 'Fira Code', 'Consolas', monospace;
  --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
}

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

html,
body {
  height: 100%;
  font-family: var(--font-sans);
  background: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition);
}

a:hover {
  color: var(--accent-hover);
}

button {
  cursor: pointer;
  font-family: inherit;
  border: none;
  transition: all var(--transition);
}

input,
textarea,
select {
  font-family: inherit;
  background: var(--bg-input);
  color: var(--text-primary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px 14px;
  font-size: 14px;
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(88, 166, 255, 0.15);
}

.layout {
  display: flex;
  height: calc(100vh - var(--header-height));
  min-height: calc(100vh - var(--header-height));
}

@supports (height: 100dvh) {
  .layout {
    height: calc(100dvh - var(--header-height));
    min-height: calc(100dvh - var(--header-height));
  }
}

.sidebar {
  width: var(--sidebar-width);
  background: var(--bg-secondary);
  border-right: 1px solid var(--border);
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  overflow-y: auto;
  z-index: 100;
  display: flex;
  flex-direction: column;
}

.sidebar-header {
  padding: 20px;
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  background: var(--bg-secondary);
  z-index: 10;
}

.sidebar-logo {
  font-size: 22px;
  font-weight: 700;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 10px;
}

.sidebar-logo-icon {
  width: 32px;
  height: 32px;
  background: var(--accent);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
}

.sidebar-tagline {
  font-size: 12px;
  color: var(--text-muted);
  margin-top: 4px;
}

.sidebar-nav {
  padding: 16px 12px;
  flex: 1;
}

.sidebar-section {
  margin-bottom: 20px;
}

.sidebar-controls {
  display: flex;
  gap: 8px;
  margin-top: 12px;
}

.sidebar-control-btn {
  flex: 1;
  padding: 6px;
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-secondary);
  cursor: pointer;
  font-size: 14px;
  transition: all var(--transition);
}

.sidebar-control-btn:hover {
  background: var(--accent);
  color: var(--bg-primary);
}

.sidebar-section-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  color: var(--text-muted);
  padding: 8px 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.sidebar-category-items {
  overflow: hidden;
  max-height: 500px;
  opacity: 1;
  transition:
    max-height 0.3s ease,
    opacity 0.3s ease;
}

.sidebar-category-items.collapsed {
  max-height: 0;
  opacity: 0;
}

.sidebar-category-items[style*='display: none'] {
  opacity: 0;
}

.sidebar-collapse-icon {
  font-size: 10px;
  width: 14px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  color: var(--text-secondary);
  border-radius: var(--radius-md);
  font-size: 14px;
  transition: all var(--transition);
}

.sidebar-link:hover {
  background: var(--bg-tertiary);
  color: var(--text-primary);
}

.sidebar-link.active {
  background: rgba(88, 166, 255, 0.1);
  color: var(--accent);
}

.sidebar-link-icon {
  width: 18px;
  height: 18px;
  opacity: 0.7;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-width);
  min-height: 0;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
}

.tool-page {
  padding: 32px;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.tool-header {
  margin-bottom: 28px;
}

.tool-title {
  font-size: 28px;
  font-weight: 700;
  margin-bottom: 8px;
}

.tool-description {
  color: var(--text-secondary);
  font-size: 15px;
}

.tool-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

@media (max-width: 900px) {
  .tool-layout {
    grid-template-columns: 1fr;
  }
}

.tool-panel {
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 20px;
}

.tool-panel-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 16px;
}

.tool-panel-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.tool-textarea {
  width: 100%;
  min-height: 300px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  background: var(--code-bg);
}

.tool-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-md);
  transition: all var(--transition);
}

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

.btn-primary:hover {
  background: var(--accent-hover);
}

.btn-secondary {
  background: var(--bg-tertiary);
  color: var(--text-primary);
  border: 1px solid var(--border);
}

.btn-secondary:hover {
  background: var(--border);
}

.btn-icon {
  padding: 10px;
}

.btn-sm {
  padding: 6px 12px;
  font-size: 12px;
}

.btn-group {
  display: flex;
  gap: 8px;
}

.btn-group .btn {
  flex: 1;
}

.error-message {
  background: rgba(248, 81, 73, 0.1);
  border: 1px solid var(--error);
  color: var(--error);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-top: 12px;
}

.success-message {
  background: rgba(63, 185, 80, 0.1);
  border: 1px solid var(--success);
  color: var(--success);
  padding: 12px 16px;
  border-radius: var(--radius-md);
  font-size: 14px;
  margin-top: 12px;
}

.toggle-group {
  display: flex;
  background: var(--bg-tertiary);
  border-radius: var(--radius-md);
  padding: 4px;
}

.toggle-btn {
  padding: 8px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  background: transparent;
  border-radius: var(--radius-sm);
}

.toggle-btn.active {
  background: var(--bg-secondary);
  color: var(--text-primary);
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
}

.footer {
  margin-top: auto;
  padding: 20px;
  border-top: 1px solid var(--border);
  text-align: center;
  color: var(--text-muted);
  font-size: 13px;
}

.privacy-notice {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(88, 166, 255, 0.08);
  border: 1px solid rgba(88, 166, 255, 0.2);
  border-radius: var(--radius-md);
  font-size: 13px;
  color: var(--text-secondary);
  margin-bottom: 20px;
}

.privacy-notice-icon {
  color: var(--success);
}

select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%238b949e' d='M6 8L1 3h10z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  padding-right: 36px;
}

label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-secondary);
  margin-bottom: 6px;
}

.input-group {
  margin-bottom: 16px;
}

.input-row {
  display: flex;
  gap: 12px;
  align-items: flex-end;
  flex-wrap: wrap;
}

.input-row > * {
  flex: 1;
}

.result-output {
  width: 100%;
  min-height: 300px;
  resize: vertical;
  font-family: var(--font-mono);
  font-size: 13px;
  line-height: 1.5;
  background: var(--code-bg);
}

#encode-input,
#encode-output {
  min-height: 120px;
}

#url-input,
#url-output {
  min-height: 120px;
}

.ad-container {
  background: var(--bg-tertiary);
  border: 1px dashed var(--border);
  border-radius: var(--radius-md);
  min-height: 250px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  font-size: 13px;
}

.ad-container-sidebar {
  margin: 16px;
  border-radius: var(--radius-md);
}

.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 14px 20px;
  font-size: 14px;
  box-shadow: var(--shadow);
  z-index: 1000;
  animation: slideIn 0.3s ease;
}

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

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

@keyframes slideIn {
  from {
    transform: translateY(20px);
    opacity: 0;
  }
  to {
    transform: translateY(0);
    opacity: 1;
  }
}

@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s ease;
  }

  .sidebar.open {
    transform: translateX(0);
  }

  .main-content {
    margin-left: 0;
  }

  .tool-page {
    padding: 20px;
  }

  .mobile-menu-btn {
    display: flex;
  }
}

.mobile-menu-btn {
  display: none;
  position: fixed;
  top: 16px;
  left: 16px;
  z-index: 101;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 10px;
  color: var(--text-primary);
}

@media (max-width: 768px) {
  .mobile-menu-btn {
    display: flex;
  }
}

/* Cmd+K Modal */
.cmd-k-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(0, 0, 0, 0.6);
  backdrop-filter: blur(4px);
  z-index: 1000;
  display: none;
  align-items: flex-start;
  justify-content: center;
  padding-top: 15vh;
}

.cmd-k-overlay.active {
  display: flex;
}

.cmd-k-modal {
  width: 100%;
  max-width: 560px;
  background: var(--bg-secondary);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow);
  overflow: hidden;
  animation: cmd-k-slide-in 0.15s ease;
}

@keyframes cmd-k-slide-in {
  from {
    opacity: 0;
    transform: translateY(-10px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.cmd-k-input-wrapper {
  display: flex;
  align-items: center;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  gap: 12px;
}

.cmd-k-search-icon {
  color: var(--text-muted);
  margin-right: 12px;
  font-size: 18px;
}

.cmd-k-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  font-size: 16px;
  color: var(--text-primary);
  font-family: var(--font-sans);
}

.cmd-k-input::placeholder {
  color: var(--text-muted);
}

.cmd-k-shortcut {
  display: flex;
  gap: 4px;
}

.cmd-k-shortcut kbd {
  background: var(--bg-tertiary);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 2px 6px;
  font-size: 11px;
  font-family: var(--font-mono);
  color: var(--text-secondary);
}

.cmd-k-results {
  max-height: 400px;
  overflow-y: auto;
  padding: 8px;
}

.cmd-k-results::-webkit-scrollbar {
  width: 6px;
}

.cmd-k-results::-webkit-scrollbar-track {
  background: transparent;
}

.cmd-k-results::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: 3px;
}

.cmd-k-group {
  margin-bottom: 8px;
}

.cmd-k-group-title {
  font-size: 11px;
  font-weight: 600;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  padding: 8px 12px 4px;
}

.cmd-k-item {
  display: flex;
  align-items: center;
  padding: 10px 12px;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: background var(--transition);
}

.cmd-k-item:hover,
.cmd-k-item.selected {
  background: var(--bg-tertiary);
}

.cmd-k-item-icon {
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-primary);
  border-radius: var(--radius-sm);
  margin-right: 12px;
  font-size: 16px;
}

.cmd-k-item-content {
  flex: 1;
}

.cmd-k-item-title {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-primary);
}

.cmd-k-item-desc {
  font-size: 12px;
  color: var(--text-secondary);
  margin-top: 2px;
}

.cmd-k-empty {
  padding: 32px;
  text-align: center;
  color: var(--text-muted);
}

.cmd-k-footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 12px 16px;
  border-top: 1px solid var(--border);
  font-size: 11px;
  color: var(--text-muted);
}

.cmd-k-footer-hints {
  display: flex;
  gap: 12px;
}

.cmd-k-footer-hints span {
  display: flex;
  align-items: center;
  gap: 4px;
}