:root {
  /* Light Theme Palette */
  --bg-app: #f4f5f8;
  --bg-sidebar: #ffffff;
  --bg-card: #ffffff;
  --bg-card-hover: #fafafa;
  --bg-input: #f8f9fa;

  --border-color: #e2e8f0;
  --border-highlight: #cbd5e1;

  --text-main: #0f172a;
  --text-muted: #64748b;

  --primary: #4f46e5;
  --primary-hover: #4338ca;
  --primary-glow: rgba(79, 70, 229, 0.25);

  --accent: #ec4899;
  --success: #10b981;
  --scrollbar-track: #e5e7eb;
  --scrollbar-thumb: #b8c0cc;
  --scrollbar-thumb-hover: #9ea8b8;

  --shadow-sm: 0 4px 6px -1px rgba(0, 0, 0, 0.05), 0 2px 4px -1px rgba(0, 0, 0, 0.03);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
  --sidebar-expanded-width: 290px;
  --sidebar-rail-width: 76px;
}

html.dark-theme,
body.dark-theme {
  --bg-app: #0f1115;
  --bg-sidebar: #14171d;
  --bg-card: #1a1d24;
  --bg-card-hover: #1e222a;
  --bg-input: #0f1115;

  --border-color: #2b303b;
  --border-highlight: #3f4657;

  --text-main: #f8fafc;
  --text-muted: #94a3b8;

  --primary: #6366f1;
  --primary-hover: #818cf8;
  --scrollbar-track: #121722;
  --scrollbar-thumb: #4a5568;
  --scrollbar-thumb-hover: #64748b;

  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 8px 16px rgba(0, 0, 0, 0.3);
  --shadow-lg: 0 16px 32px rgba(0, 0, 0, 0.4);
  color-scheme: dark;
}

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

body {
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

html {
  scrollbar-color: var(--scrollbar-thumb) var(--scrollbar-track);
}

html::-webkit-scrollbar,
body::-webkit-scrollbar,
.sidebar-nav::-webkit-scrollbar,
.page-content::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

html::-webkit-scrollbar-track,
body::-webkit-scrollbar-track,
.sidebar-nav::-webkit-scrollbar-track,
.page-content::-webkit-scrollbar-track {
  background: var(--scrollbar-track);
}

html::-webkit-scrollbar-thumb,
body::-webkit-scrollbar-thumb,
.sidebar-nav::-webkit-scrollbar-thumb,
.page-content::-webkit-scrollbar-thumb {
  background: var(--scrollbar-thumb);
  border-radius: 999px;
  border: 2px solid var(--scrollbar-track);
}

html::-webkit-scrollbar-thumb:hover,
body::-webkit-scrollbar-thumb:hover,
.sidebar-nav::-webkit-scrollbar-thumb:hover,
.page-content::-webkit-scrollbar-thumb:hover {
  background: var(--scrollbar-thumb-hover);
}

/* Layout */
.layout-wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-expanded-width);
  background-color: var(--bg-sidebar);
  border-right: 1px solid var(--border-color);
  display: flex;
  flex-direction: column;
  position: fixed;
  top: 72px;
  height: calc(100vh - 72px);
  z-index: 10;
  overflow: visible;
  transition: width 0.24s cubic-bezier(0.4, 0, 0.2, 1), box-shadow 0.2s ease;
}

.layout-wrapper.sidebar-collapsed .sidebar {
  width: var(--sidebar-rail-width);
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-expanded-width);
  display: flex;
  flex-direction: column;
  min-width: 0;
  min-height: 100vh;
  padding-top: 72px;
  transition: margin-left 0.24s cubic-bezier(0.4, 0, 0.2, 1);
}

.layout-wrapper.sidebar-collapsed .main-content {
  margin-left: var(--sidebar-rail-width);
}

.sidebar-hover-trigger {
  display: none;
}

.layout-wrapper.sidebar-collapsed.sidebar-hovered .sidebar {
  box-shadow: none;
}

button.floating-pin-btn {
  display: none;
}

.layout-wrapper.sidebar-collapsed:not(.sidebar-hovered) .floating-pin-btn {
  opacity: 0;
  pointer-events: none;
}

.pin-sidebar-btn {
  color: var(--muted);
}
.pin-sidebar-btn:hover {
  color: var(--text);
  background: var(--bg-hover);
}
.pin-sidebar-btn.is-pinned {
  color: var(--accent);
}
.pin-sidebar-btn .icon-undock {
  display: none;
}
.pin-sidebar-btn.is-pinned .icon-dock {
  display: none;
}
.pin-sidebar-btn.is-pinned .icon-undock {
  display: block;
}

/* Sidebar Elements */
.brand-container {
  padding: 24px;
  border-bottom: 1px solid var(--border-color);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
}

.logo-link {
  display: inline-flex;
  text-decoration: none;
}

.brand-text {
  display: inline-block;
  font-size: 1.55rem;
  font-weight: 900;
  letter-spacing: -0.03em;
  line-height: 1;
  white-space: nowrap;
  background: linear-gradient(135deg, #6d42f4 0%, #5a73f6 52%, #dd5fad 78%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.sidebar-nav {
  padding: 22px 16px 24px;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: 24px;
  overflow-x: hidden;
  scrollbar-width: thin;
}

.nav-section {
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.nav-heading {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 4px;
  padding-left: 12px;
  transition: opacity 0.14s ease;
}

.nav-item {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  text-decoration: none;
  padding: 8px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: all 0.2s ease;
  position: relative;
  min-height: 44px;
  white-space: nowrap;
  --nav-accent: var(--primary);
}

.nav-item:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
}

.nav-item.active {
  color: var(--text-main);
  background-color: rgba(99, 102, 241, 0.1);
  background-color: color-mix(in srgb, var(--nav-accent) 12%, transparent);
}

.nav-item svg {
  width: 21px;
  height: 21px;
  color: var(--nav-accent);
  flex: 0 0 21px;
  transition: width 0.2s ease, height 0.2s ease, transform 0.2s ease;
}

.nav-item:hover svg,
.nav-item.active svg {
  transform: translateY(-1px);
}

.nav-label {
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  transition: opacity 0.16s ease, transform 0.16s ease;
}

.layout-wrapper.sidebar-is-opening .nav-label,
.layout-wrapper.sidebar-is-closing .nav-label {
  opacity: 0;
  pointer-events: none;
  transform: translateX(-6px);
}

.layout-wrapper.sidebar-is-opening .nav-heading,
.layout-wrapper.sidebar-is-closing .nav-heading {
  opacity: 0;
}

.nav-indicator {
  position: absolute;
  left: 0;
  top: 50%;
  transform: translateY(-50%);
  height: 60%;
  width: 3px;
  background-color: var(--primary);
  border-radius: 0 4px 4px 0;
}

.nav-category.cat-text-content { --nav-accent: #4f46e5; }
.nav-category.cat-data-conversion { --nav-accent: #10b981; }
.nav-category.cat-encoding-security { --nav-accent: #ec4899; }
.nav-category.cat-generators { --nav-accent: #f59e0b; }
.nav-category.cat-productivity { --nav-accent: #3b82f6; }
.nav-category.cat-finance-business { --nav-accent: #14b8a6; }
.nav-category.cat-electronics-embedded { --nav-accent: #22c55e; }
.nav-category.cat-mechanical-manufacturing { --nav-accent: #a855f7; }
.nav-category.cat-gis-mapping { --nav-accent: #06b6d4; }
.nav-category.cat-engineering { --nav-accent: #f97316; }
.nav-category.cat-seo { --nav-accent: #e11d48; }
.nav-category.cat-fun { --nav-accent: #0ea5e9; }

.layout-wrapper.sidebar-collapsed .sidebar-nav {
  padding: 16px 9px 12px;
  gap: 12px;
  align-items: center;
}

.layout-wrapper.sidebar-collapsed .nav-section {
  width: 100%;
  align-items: center;
  gap: 9px;
}

.layout-wrapper.sidebar-collapsed .nav-heading {
  width: 34px;
  height: 1px;
  margin: 2px 0 4px;
  padding: 0;
  overflow: hidden;
  color: transparent;
  background: var(--border-color);
}

.layout-wrapper.sidebar-collapsed .nav-item {
  width: 48px;
  height: 48px;
  min-height: 48px;
  justify-content: center;
  gap: 0;
  padding: 0;
  border-radius: 14px;
}

.layout-wrapper.sidebar-collapsed .nav-item svg {
  width: 25px;
  height: 25px;
  flex-basis: 25px;
}

.layout-wrapper.sidebar-collapsed .nav-label {
  position: absolute;
  opacity: 0;
  pointer-events: none;
  transform: translateX(-6px);
}

.layout-wrapper.sidebar-collapsed .nav-indicator {
  left: -8px;
  height: 42%;
}

.sidebar-footer {
  position: relative;
  flex: 0 0 auto;
  padding: 10px 12px 12px;
  border-top: 1px solid var(--border-color);
  background: linear-gradient(180deg, transparent 0%, rgba(79, 70, 229, 0.045) 100%);
  overflow: visible;
}

.sidebar-footer .btn {
  font-size: 0.85rem;
  padding: 8px 12px;
}

.sidebar-recent-trigger {
  width: 100%;
  min-height: 40px;
  border: 1px solid var(--border-color);
  border-radius: 12px;
  background: var(--bg-card);
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font: inherit;
  font-size: 0.82rem;
  font-weight: 700;
  cursor: default;
  transition: color 0.18s ease, border-color 0.18s ease, background-color 0.18s ease, transform 0.18s ease;
}

.sidebar-recent-trigger svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex: 0 0 18px;
}

.sidebar-footer-item {
  position: relative;
  width: 100%;
}

.sidebar-footer-item:hover .sidebar-recent-trigger,
.sidebar-footer-item:focus-within .sidebar-recent-trigger {
  color: var(--text-main);
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.sidebar-recent-panel {
  position: absolute;
  left: 12px;
  right: 12px;
  bottom: calc(100% + 4px);
  z-index: 80;
  padding: 14px;
  border: 1px solid var(--border-color);
  border-radius: 14px;
  background: var(--bg-sidebar);
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition: opacity 0.16s ease, visibility 0.16s ease, transform 0.16s ease;
}

.sidebar-recent-panel::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: -6px;
  height: 6px;
}

.sidebar-footer-item:hover .sidebar-recent-panel,
.sidebar-footer-item:focus-within .sidebar-recent-panel {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(0);
}

.sidebar-quick-title {
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  font-weight: 700;
  margin-bottom: 8px;
  padding-left: 4px;
}

.sidebar-quick-actions {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.sidebar-recent-tools {
  display: flex;
  flex-direction: column;
  gap: 8px;
  max-height: 182px;
  overflow-y: auto;
  margin-top: 2px;
  padding-top: 2px;
  padding-right: 2px;
}

.layout-wrapper.sidebar-collapsed .sidebar-footer {
  padding: 9px 9px 11px;
}

.layout-wrapper.sidebar-collapsed .sidebar-recent-trigger {
  width: 48px;
  height: 48px;
  min-height: 48px;
  padding: 0;
  border-radius: 14px;
}

.layout-wrapper.sidebar-collapsed .sidebar-recent-trigger span {
  position: absolute;
  opacity: 0;
  pointer-events: none;
}

.layout-wrapper.sidebar-collapsed .sidebar-recent-trigger svg {
  width: 23px;
  height: 23px;
  flex-basis: 23px;
}

.layout-wrapper.sidebar-collapsed .sidebar-recent-panel {
  left: calc(100% + 4px);
  right: auto;
  bottom: 7px;
  width: 266px;
  transform: translateX(-8px);
}

.layout-wrapper.sidebar-collapsed .sidebar-recent-panel::after {
  left: -6px;
  right: auto;
  bottom: 0;
  width: 6px;
  height: 100%;
}

.layout-wrapper.sidebar-collapsed .sidebar-footer-item:hover .sidebar-recent-panel,
.layout-wrapper.sidebar-collapsed .sidebar-footer-item:focus-within .sidebar-recent-panel {
  transform: translateX(0);
}

.sidebar-recent-empty {
  font-size: 0.76rem;
  color: var(--text-muted);
  background: var(--bg-card);
  border: 1px dashed var(--border-color);
  border-radius: 10px;
  padding: 8px 10px;
}

.sidebar-recent-link {
  display: flex;
  align-items: center;
  gap: 7px;
  text-decoration: none;
  color: var(--text-main);
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 9px;
  padding: 10px 11px;
  font-size: 0.92rem;
  font-weight: 600;
  line-height: 1.2;
  transition: all 0.18s ease;
}

.sidebar-recent-link:hover {
  border-color: var(--primary);
  background: var(--bg-card-hover);
  transform: translateY(-1px);
}

.sidebar-recent-link svg {
  width: 12px;
  height: 12px;
  color: var(--primary);
  flex-shrink: 0;
}

.sidebar-recent-link span {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.sidebar-toggle-arrow {
  position: fixed;
  top: calc(72px + ((100vh - 72px) / 2));
  left: var(--sidebar-expanded-width);
  transform: translateY(-50%);
  width: 18px;
  height: 92px;
  border-radius: 0 9px 9px 0;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-left: 0;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  z-index: 25;
  box-shadow: 5px 0 12px rgba(15, 23, 42, 0.08);
  transition: left 0.24s cubic-bezier(0.4, 0, 0.2, 1), color 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, transform 0.2s ease;
}

.sidebar-toggle-arrow:hover {
  color: var(--text-main);
  border-color: var(--border-highlight);
  background-color: var(--bg-card-hover);
  transform: translateY(-50%);
}

.chevron-icon {
  transition: transform 0.3s ease;
}

.layout-wrapper.sidebar-collapsed .chevron-icon {
  transform: rotate(180deg);
}

.layout-wrapper.sidebar-collapsed .sidebar-toggle-arrow {
  left: var(--sidebar-rail-width);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 8px 16px;
  border-radius: 8px;
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
  border: 1px solid transparent;
  font-family: ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

.btn-primary {
  background-color: var(--primary);
  color: #fff;
  box-shadow: 0 4px 12px var(--primary-glow);
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 16px var(--primary-glow);
}

.btn-secondary {
  background-color: var(--bg-card);
  border-color: var(--border-color);
  color: var(--text-main);
}

.btn-secondary:hover {
  background-color: var(--bg-card-hover);
  border-color: var(--border-highlight);
}

.btn-outline {
  background-color: transparent;
  border-color: var(--border-color);
  color: var(--text-muted);
}

.btn-outline:hover {
  color: var(--text-main);
  border-color: var(--border-highlight);
  background-color: rgba(0, 0, 0, 0.02);
}

.btn-large {
  padding: 12px 24px;
  font-size: 1rem;
}

.btn-small {
  padding: 6px 12px;
  font-size: 0.8rem;
}

.full-width {
  width: 100%;
}

.icon-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  width: 36px;
  height: 36px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.icon-btn:hover {
  color: var(--text-main);
  background-color: var(--bg-card);
}

/* Topbar */
.topbar {
  display: flex;
  justify-content: flex-start;
  align-items: center;
  padding: 0;
  border-bottom: 1px solid var(--border-color);
  background-color: var(--bg-card);
  backdrop-filter: blur(12px);
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 20;
}

.topbar-brand-box {
  width: var(--sidebar-expanded-width);
  min-width: var(--sidebar-expanded-width);
  height: 72px;
  border-right: 1px solid var(--border-color);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 16px;
  transition: width 0.24s cubic-bezier(0.4, 0, 0.2, 1), min-width 0.24s cubic-bezier(0.4, 0, 0.2, 1);
}

.topbar-logo-link {
  display: inline-flex;
  text-decoration: none;
}

.layout-wrapper.sidebar-collapsed .topbar-brand-box {
  width: var(--sidebar-rail-width);
  min-width: var(--sidebar-rail-width);
  padding: 0 4px;
}

.layout-wrapper.sidebar-collapsed .topbar-logo-link {
  width: 100%;
  justify-content: center;
}

.layout-wrapper.sidebar-collapsed .brand-text,
.layout-wrapper.sidebar-is-opening .brand-text,
.layout-wrapper.sidebar-is-closing .brand-text {
  font-size: 0;
}

.layout-wrapper.sidebar-collapsed .brand-text::after,
.layout-wrapper.sidebar-is-opening .brand-text::after,
.layout-wrapper.sidebar-is-closing .brand-text::after {
  content: "{IO}";
  font-size: 1.32rem;
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.06em;
  background: linear-gradient(135deg, #6d42f4 0%, #5a73f6 52%, #dd5fad 78%);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  color: transparent;
}

.mobile-menu-btn,
.topbar-mobile-theme {
  display: none;
}

.mobile-menu-btn {
  width: 44px;
  height: 44px;
}

.mobile-sidebar-backdrop {
  display: none;
}

.mobile-sidebar-close {
  display: none;
}

.mobile-search-sticky {
  display: none;
}

.topbar-main {
  flex: 1;
  min-width: 0;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  padding: 10px 24px 10px 34px;
}

.search-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 999px;
  padding: 10px 18px;
  width: 520px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  position: relative;
}

.layout-wrapper.sidebar-collapsed .search-bar {
  margin-left: 0;
}

.search-bar:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.search-bar svg {
  color: var(--text-muted);
}

.search-bar input {
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-main);
  font-size: 0.95rem;
  width: 100%;
}

.search-bar input::placeholder {
  color: var(--text-muted);
}

.search-suggestions {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 6px;
  z-index: 30;
  max-height: 320px;
  overflow: auto;
}

.search-suggestion-item {
  width: 100%;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: 2px;
  text-align: left;
  border: none;
  background: transparent;
  color: var(--text-main);
  padding: 9px 10px;
  border-radius: 10px;
  cursor: pointer;
}

.search-suggestion-item:hover,
.search-suggestion-item.is-active {
  background: var(--bg-card-hover);
}

.search-suggestion-title {
  font-size: 0.9rem;
  font-weight: 600;
}

.search-suggestion-title mark {
  background: rgba(99, 102, 241, 0.18);
  color: inherit;
  border-radius: 4px;
  padding: 0 2px;
}

.search-suggestion-sub {
  font-size: 0.78rem;
  color: var(--text-muted);
  word-break: break-word;
}

.search-suggestion-empty {
  color: var(--text-muted);
  padding: 10px 12px;
  font-size: 0.84rem;
}

.topbar-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  margin-right: 0;
}

.topbar-links {
  display: flex;
  gap: 24px;
}

.topbar-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 1.02rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: color 0.2s ease;
}

.topbar-links a:hover {
  color: var(--text-main);
}

.theme-toggle svg {
  display: none;
}

body:not(.dark-theme) .moon-icon {
  display: block;
  color: #14b8a6; /* Teal */
}

body:not(.dark-theme) .theme-toggle:hover {
  background-color: rgba(20, 184, 166, 0.1);
}

body.dark-theme .sun-icon {
  display: block;
  color: #f97316; /* Orange */
}

body.dark-theme .theme-toggle:hover {
  background-color: rgba(249, 115, 22, 0.1);
}

.avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-weight: 700;
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
  cursor: pointer;
}

/* Page Content */
.page-content {
  padding: 40px 25px 48px;
  display: flex;
  flex-direction: column;
  gap: 32px;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

.hero {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: 24px;
}

.hero h1 {
  font-size: 2.25rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.hero p {
  color: var(--text-muted);
  font-size: 1.1rem;
  max-width: 600px;
}

/* Bento Layout */
.tool-bento {
  display: grid;
  grid-template-columns: 350px 1fr;
  gap: 24px;
  align-items: start;
}

.bento-card {
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 16px;
  padding: 24px;
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.bento-card h3 {
  font-size: 1.1rem;
  font-weight: 600;
  color: var(--text-main);
}

/* Forms & Inputs */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.input-group label {
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--text-muted);
}

.range-wrapper {
  display: flex;
  align-items: center;
  gap: 16px;
}

input[type="range"] {
  flex: 1;
  -webkit-appearance: none;
  background: transparent;
  height: 4px;
  border-radius: 2px;
  background-color: var(--border-color);
  outline: none;
}

input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none;
  height: 16px;
  width: 16px;
  border-radius: 50%;
  background: var(--primary);
  cursor: pointer;
  box-shadow: 0 0 10px var(--primary-glow);
}

.num-input {
  width: 60px;
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 6px;
  padding: 6px 8px;
  font-size: 0.9rem;
  text-align: center;
  outline: none;
  font-family: inherit;
}

.num-input:focus {
  border-color: var(--primary);
}

.checkbox-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
  background-color: var(--bg-input);
  padding: 16px;
  border-radius: 12px;
  border: 1px solid var(--border-color);
}

.custom-checkbox {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  cursor: pointer;
  user-select: none;
}

.custom-checkbox input {
  position: absolute;
  opacity: 0;
  cursor: pointer;
  height: 0;
  width: 0;
}

.checkmark {
  height: 18px;
  width: 18px;
  background-color: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: 4px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all 0.2s ease;
}

.custom-checkbox:hover .checkmark {
  border-color: var(--border-highlight);
}

.custom-checkbox input:checked~.checkmark {
  background-color: var(--primary);
  border-color: var(--primary);
}

.checkmark:after {
  content: "";
  display: none;
  width: 4px;
  height: 8px;
  border: solid white;
  border-width: 0 2px 2px 0;
  transform: rotate(45deg);
  margin-bottom: 2px;
}

.custom-checkbox input:checked~.checkmark:after {
  display: block;
}

.custom-checkbox input:checked~span:last-child {
  color: var(--text-main);
}

.action-row {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.action-row .btn {
  flex: 1;
}

.small-group {
  width: 80px;
}

.small-group input {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  color: var(--text-main);
  border-radius: 6px;
  padding: 11px 8px;
  font-size: 1rem;
  text-align: center;
  outline: none;
  font-family: inherit;
}

/* Output Area */
.output-card {
  height: 100%;
}

.card-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.output-console {
  background-color: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 12px;
  padding: 16px 0;
  flex: 1;
  font-family: 'Fira Code', 'Courier New', monospace;
  font-size: 0.95rem;
  overflow-y: auto;
}

.output-line {
  display: flex;
  padding: 4px 16px;
  transition: background-color 0.1s ease;
}

.output-line:hover {
  background-color: rgba(0, 0, 0, 0.02);
}

.output-line span {
  color: var(--border-highlight);
  width: 32px;
  user-select: none;
}

.output-line code {
  color: var(--text-main);
  word-break: break-all;
}

.status-bar {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-muted);
}

.status-indicator {
  width: 8px;
  height: 8px;
  border-radius: 50%;
}

.status-indicator.success {
  background-color: var(--success);
  box-shadow: 0 0 8px rgba(16, 185, 129, 0.4);
}

/* Footer */
.site-footer {
  margin-top: auto;
  padding: 14px 24px;
  background-color: var(--bg-card);
  border-top: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  font-size: 0.875rem;
  color: var(--text-muted);
}

.footer-left {
  flex-shrink: 0;
  white-space: nowrap;
}

.footer-center {
  display: flex;
  align-items: center;
  gap: 12px;
  white-space: nowrap;
}

.footer-center strong {
  color: var(--text-main);
  font-weight: 600;
}

.footer-links {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-shrink: 0;
  white-space: nowrap;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.footer-links a:hover {
  color: var(--primary);
}

.donate-btn {
  border-radius: 999px !important;
  padding: 6px 18px !important;
  font-size: 0.85rem !important;
  font-weight: 600 !important;
  flex-shrink: 0;
}

body.donate-modal-open {
  overflow: hidden;
}

.donate-modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(8, 14, 28, 0.52);
  display: grid;
  place-items: center;
  z-index: 9999;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease;
  padding: 16px;
}

.donate-modal-overlay.is-open {
  opacity: 1;
  pointer-events: auto;
}

.donate-modal {
  width: min(560px, 100%);
  background: var(--bg-card);
  color: var(--text-main);
  border: 1px solid var(--border-color);
  border-radius: 14px;
  box-shadow: var(--shadow-lg);
  padding: 24px 24px 20px;
}

.donate-modal-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 10px;
  margin-bottom: 18px;
}

.donate-modal-header h3 {
  margin: 0;
  font-size: 1.15rem;
  line-height: 1.2;
}

.donate-modal-close {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  border: 1px solid var(--border-color);
  background: var(--bg-card);
  color: var(--text-muted);
  cursor: pointer;
  font-size: 1.2rem;
  line-height: 1;
}

.donate-modal-copy {
  margin: 0 0 14px;
  color: var(--text-muted);
  line-height: 1.5;
}

.donate-wallet-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 14px;
  align-items: center;
  margin-bottom: 14px;
}

.donate-wallet-address {
  display: block;
  font-family: Consolas, "Courier New", monospace;
  font-size: 0.9rem;
  background: var(--bg-input);
  border: 1px solid var(--border-color);
  border-radius: 10px;
  padding: 12px 14px;
  overflow-wrap: anywhere;
}

.donate-copy-btn {
  min-width: 92px;
  justify-self: end;
}

.donate-modal-note {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

@media (max-width: 1024px) {
  .sidebar {
    width: var(--sidebar-expanded-width);
    display: flex;
    top: 0;
    height: 100vh;
    transform: translateX(-100%);
    z-index: 120;
  }

  .layout-wrapper.sidebar-collapsed .sidebar {
    width: var(--sidebar-expanded-width);
    transform: translateX(-100%);
  }

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

  .layout-wrapper.sidebar-collapsed .main-content {
    margin-left: 0;
  }

  .layout-wrapper.mobile-sidebar-open .sidebar {
    transform: translateX(0);
  }

  .layout-wrapper.sidebar-collapsed .sidebar-nav {
    padding: 22px 16px 24px;
    gap: 24px;
    align-items: stretch;
  }

  .layout-wrapper.sidebar-collapsed .nav-section {
    width: auto;
    align-items: stretch;
    gap: 4px;
  }

  .layout-wrapper.sidebar-collapsed .nav-heading {
    width: auto;
    height: auto;
    margin-bottom: 4px;
    padding-left: 12px;
    overflow: visible;
    color: var(--text-muted);
    background: transparent;
  }

  .layout-wrapper.sidebar-collapsed .nav-item {
    width: auto;
    height: auto;
    min-height: 44px;
    justify-content: flex-start;
    gap: 12px;
    padding: 8px 12px;
    border-radius: 8px;
  }

  .layout-wrapper.sidebar-collapsed .nav-item svg {
    width: 21px;
    height: 21px;
    flex-basis: 21px;
  }

  .layout-wrapper.sidebar-collapsed .nav-label {
    position: static;
    opacity: 1;
    pointer-events: auto;
    transform: none;
  }

  .layout-wrapper.sidebar-collapsed .nav-indicator {
    left: 0;
    height: 60%;
  }

  .mobile-sidebar-close {
    position: fixed;
    top: 14px;
    left: 282px;
    width: 36px;
    height: 36px;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    background: var(--bg-card);
    color: var(--text-muted);
    align-items: center;
    justify-content: center;
    z-index: 135;
    cursor: pointer;
    display: none;
  }

  .mobile-sidebar-close:hover {
    color: var(--text-main);
    border-color: var(--border-highlight);
  }

  .layout-wrapper.mobile-sidebar-open .mobile-sidebar-close {
    display: inline-flex;
  }

  .topbar {
    position: static;
    flex-direction: column;
    align-items: stretch;
    z-index: 30;
    border-bottom: 0;
  }

  .topbar-brand-box {
    width: 100%;
    min-width: 0;
    height: 72px;
    border-right: 0;
    border-bottom: 1px solid var(--border-color);
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 10px;
    padding: 0 12px;
  }

  .layout-wrapper.sidebar-collapsed .topbar-brand-box {
    width: 100%;
    min-width: 0;
    padding: 0 12px;
  }

  .layout-wrapper.sidebar-collapsed .brand-text {
    font-size: 1.55rem;
  }

  .layout-wrapper.sidebar-collapsed .brand-text::after {
    content: none;
  }

  .topbar-logo-link {
    justify-self: center;
  }

  .mobile-menu-btn {
    display: inline-flex;
    justify-self: start;
  }

  .topbar-mobile-theme {
    display: inline-flex;
    justify-self: end;
  }

  .topbar-main {
    display: none;
  }

  .mobile-search-sticky {
    display: block;
    position: -webkit-sticky;
    position: sticky;
    top: 0;
    z-index: 85;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
    padding: 10px 14px;
  }

  .mobile-search-sticky .search-bar {
    width: 100%;
    max-width: 100%;
  }

  .topbar-actions {
    display: none;
  }

  .sidebar-toggle-arrow {
    display: none;
  }

  .mobile-sidebar-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(2, 6, 23, 0.45);
    z-index: 110;
    border: 0;
    padding: 0;
    margin: 0;
    cursor: pointer;
  }

  .layout-wrapper.mobile-sidebar-open .mobile-sidebar-backdrop {
    display: block;
  }

  .page-content {
    padding: 18px 20px 48px;
    gap: 20px;
  }

  .site-footer {
    flex-wrap: wrap;
    justify-content: center;
    text-align: center;
    gap: 10px;
    padding: 12px 14px;
  }

  .footer-left,
  .footer-center,
  .footer-links {
    white-space: normal;
  }

  .footer-links {
    justify-content: center;
    flex-wrap: wrap;
    gap: 10px 14px;
  }
}

@media (max-width: 760px) {
  .topbar-links a {
    font-size: 0.95rem;
  }

  .footer-center {
    flex-wrap: wrap;
    justify-content: center;
  }
}

@media (max-width: 560px) {
  .donate-modal {
    padding: 18px 16px 16px;
  }

  .donate-wallet-row {
    grid-template-columns: 1fr;
    gap: 10px;
  }

  .donate-copy-btn {
    width: 100%;
    justify-self: stretch;
  }
}