/* ==========================================================================
   HUZIKIT — UNIX TIMESTAMP MASTER STYLESHEET
   Brand: Huzikit.com
   Color System: Huzikit Purple/Indigo
   Zero Horizontal Overflow Architecture
   ========================================================================== */

/* 1. CSS VARIABLES & SYSTEM TOKENS */
:root {
  --ink: #15132b;
  --ink-soft: #4d4a6b;
  --ink-faint: #8985a8;
  --bg: #fcfbff;
  --bg-soft: #f4f2ff;
  --line: #e7e4f6;
  --line-soft: #f0eefb;
  --primary: #4f46e5;
  --primary-dark: #3b33c4;
  --primary-light: #eeebff;
  --accent: #7c3aed;
  --white: #ffffff;

  /* Elevation Shadows */
  --shadow-sm: 0 1px 2px rgba(21, 19, 43, 0.05);
  --shadow-md:
    0 4px 12px -2px rgba(21, 19, 43, 0.08),
    0 2px 6px -1px rgba(21, 19, 43, 0.04);
  --shadow-lg:
    0 12px 28px -4px rgba(21, 19, 43, 0.1),
    0 4px 12px -2px rgba(21, 19, 43, 0.05);
  --shadow-glow: 0 0 24px rgba(124, 58, 237, 0.18);

  /* Radius System */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 20px;
  --radius-pill: 9999px;

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-normal: 0.25s ease;
}

/* 2. RESET & BASE PREVENTING OVERFLOW */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  width: 100%;
  max-width: 100%;
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  width: 100%;
  max-width: 100%;
  min-height: 100vh;
  margin: 0;
  padding: 0;
  background-color: var(--bg);
  color: var(--ink);
  font-family:
    "Inter",
    -apple-system,
    BlinkMacSystemFont,
    "Segoe UI",
    Roboto,
    sans-serif;
  font-size: 1rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body.menu-open,
body.modal-open {
  overflow: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: "Lexend", sans-serif;
  color: var(--ink);
  line-height: 1.25;
  font-weight: 700;
  letter-spacing: -0.02em;
}

p {
  color: var(--ink-soft);
  max-width: 75ch;
}

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

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

button,
input,
select,
textarea {
  font-family: inherit;
  font-size: 1rem;
  color: var(--ink);
}

img,
svg {
  display: block;
  max-width: 100%;
  height: auto;
}

/* 3. FLUID CONTAINER */
.container {
  width: 100%;
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 1rem;
  padding-right: 1rem;
}

@media (min-width: 640px) {
  .container {
    padding-left: 1.5rem;
    padding-right: 1.5rem;
  }
}

@media (min-width: 1024px) {
  .container {
    padding-left: 2rem;
    padding-right: 2rem;
  }
}

/* 4. ACCESSIBILITY & UTILITIES */
.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.mono {
  font-family:
    "JetBrains Mono", "Fira Code", ui-monospace, SFMono-Regular, monospace;
}

/* 5. GLOBAL NAVBAR */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(252, 251, 255, 0.94);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  width: 100%;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 1rem;
}

.brand-logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: "Lexend", sans-serif;
  font-weight: 800;
  font-size: 1.45rem;
  color: var(--ink);
  letter-spacing: -0.03em;
  flex-shrink: 0;
}

.brand-logo:hover {
  color: var(--primary);
}

.brand-badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  border-radius: var(--radius-md);
  font-size: 1rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
}

.brand-dot {
  color: var(--accent);
}

/* Desktop Navigation Menu */
.desktop-nav {
  display: none;
  align-items: center;
  gap: 0.25rem;
}

@media (min-width: 992px) {
  .desktop-nav {
    display: flex;
  }
}

.nav-item {
  position: relative;
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.55rem 0.85rem;
  font-size: 0.935rem;
  font-weight: 600;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link:focus,
.nav-item:hover .nav-link,
.nav-item:focus-within .nav-link {
  color: var(--primary);
  background-color: var(--bg-soft);
}

.nav-arrow {
  width: 14px;
  height: 14px;
  transition: transform var(--transition-fast);
}

.nav-item:hover .nav-arrow,
.nav-item:focus-within .nav-arrow {
  transform: rotate(180deg);
}

/* Desktop Dropdown Menus */
.dropdown-menu {
  position: absolute;
  top: 100%;
  left: 0;
  min-width: 250px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0.5rem;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
  transform: translateY(8px);
  transition:
    opacity var(--transition-fast),
    transform var(--transition-fast),
    visibility var(--transition-fast);
  z-index: 60;
}

.nav-item:hover .dropdown-menu,
.nav-item:focus-within .dropdown-menu {
  opacity: 1;
  visibility: visible;
  pointer-events: auto;
  transform: translateY(4px);
}

.dropdown-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.dropdown-link:hover,
.dropdown-link:focus {
  color: var(--primary);
  background: var(--bg-soft);
  padding-left: 0.95rem;
}

.dropdown-link.active {
  color: var(--primary);
  font-weight: 600;
  background: var(--primary-light);
}

/* Nav Actions (Search & Mobile Toggle) */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.search-trigger {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.5rem 0.85rem;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  font-size: 0.875rem;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.search-trigger:hover {
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

.search-shortcut {
  display: none;
  font-size: 0.75rem;
  padding: 0.15rem 0.4rem;
  background: var(--bg-soft);
  color: var(--ink-faint);
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
}

@media (min-width: 640px) {
  .search-shortcut {
    display: inline-block;
  }
}

.mobile-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 42px;
  height: 42px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  color: var(--ink);
  cursor: pointer;
  transition: all var(--transition-fast);
}

@media (min-width: 992px) {
  .mobile-toggle {
    display: none;
  }
}

.mobile-toggle:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.mobile-toggle-bar {
  display: block;
  width: 20px;
  height: 2px;
  background: currentColor;
  position: relative;
  transition: background 0.1s var(--transition-fast);
}

.mobile-toggle-bar::before,
.mobile-toggle-bar::after {
  content: "";
  position: absolute;
  left: 0;
  width: 20px;
  height: 2px;
  background: currentColor;
  transition: transform var(--transition-fast);
}

.mobile-toggle-bar::before {
  top: -6px;
}

.mobile-toggle-bar::after {
  bottom: -6px;
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar {
  background: transparent;
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar::before {
  transform: translateY(6px) rotate(45deg);
}

.mobile-toggle[aria-expanded="true"] .mobile-toggle-bar::after {
  transform: translateY(-6px) rotate(-45deg);
}

/* 6. MOBILE NAVIGATION DRAWER */
.mobile-nav-drawer {
  position: fixed;
  top: 72px;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(21, 19, 43, 0.4);
  backdrop-filter: blur(4px);
  z-index: 90;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-normal),
    visibility var(--transition-normal);
  display: flex;
  justify-content: flex-end;
}

.mobile-nav-drawer.active {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-panel {
  width: 100%;
  max-width: 380px;
  height: 100%;
  background: var(--white);
  border-left: 1px solid var(--line);
  overflow-y: auto;
  padding: 1.5rem 1.25rem 3rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transform: translateX(100%);
  transition: transform var(--transition-normal);
}

.mobile-nav-drawer.active .mobile-nav-panel {
  transform: translateX(0);
}

.mobile-accordion {
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-md);
  overflow: hidden;
}

.mobile-accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 1rem;
  background: var(--bg-soft);
  border: none;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  cursor: pointer;
  text-align: left;
}

.mobile-accordion-btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.mobile-accordion[open] .mobile-accordion-btn svg {
  transform: rotate(180deg);
}

.mobile-accordion-content {
  padding: 0.5rem;
  background: var(--white);
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.mobile-link {
  display: block;
  padding: 0.5rem 0.75rem;
  font-size: 0.875rem;
  color: var(--ink-soft);
  border-radius: var(--radius-sm);
}

.mobile-link:hover,
.mobile-link.active {
  color: var(--primary);
  background: var(--primary-light);
}

.mobile-single-link {
  display: block;
  padding: 0.85rem 1rem;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  background: var(--bg-soft);
  border-radius: var(--radius-md);
  border: 1px solid var(--line-soft);
}

/* 7. GLOBAL SEARCH MODAL */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background: rgba(21, 19, 43, 0.55);
  backdrop-filter: blur(6px);
  z-index: 100;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 1rem;
  padding-top: clamp(2rem, 10vh, 6rem);
  opacity: 0;
  visibility: hidden;
  transition:
    opacity var(--transition-fast),
    visibility var(--transition-fast);
}

.search-modal-backdrop.active {
  opacity: 1;
  visibility: visible;
}

.search-modal-container {
  width: 100%;
  max-width: 600px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  max-height: 80vh;
  transform: translateY(-12px) scale(0.98);
  transition: transform var(--transition-fast);
}

.search-modal-backdrop.active .search-modal-container {
  transform: translateY(0) scale(1);
}

.search-modal-header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--line);
  position: relative;
}

.search-modal-input {
  flex: 1;
  min-width: 0;
  border: none;
  background: transparent;
  font-size: 1.05rem;
  color: var(--ink);
  outline: none;
}

.search-modal-close {
  background: transparent;
  border: none;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.search-modal-close:hover {
  color: var(--ink);
}

.search-results-list {
  list-style: none;
  overflow-y: auto;
  padding: 0.5rem;
  margin: 0;
  max-height: 50vh;
}

.search-result-item a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1rem;
  border-radius: var(--radius-md);
  color: var(--ink);
  transition: background var(--transition-fast);
  gap: 0.75rem;
}

.search-result-item a:hover,
.search-result-item a:focus,
.search-result-item.selected a {
  background: var(--bg-soft);
  color: var(--primary);
}

.search-result-title {
  font-weight: 600;
  font-size: 0.935rem;
  overflow-wrap: anywhere;
  word-break: break-word;
}

.search-result-category {
  font-size: 0.75rem;
  color: var(--ink-faint);
  background: var(--white);
  border: 1px solid var(--line);
  padding: 0.2rem 0.5rem;
  border-radius: var(--radius-pill);
  flex-shrink: 0;
}

.search-empty-state {
  padding: 2.5rem 1rem;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.95rem;
}

/* 8. HERO SECTION */
.hero-section {
  padding-top: clamp(2.5rem, 5vw, 4.5rem);
  padding-bottom: clamp(2.5rem, 5vw, 4rem);
  background: radial-gradient(
    100% 120% at 50% 0%,
    rgba(238, 235, 255, 0.65) 0%,
    rgba(252, 251, 255, 0) 100%
  );
  border-bottom: 1px solid var(--line-soft);
  position: relative;
}

/* Breadcrumb */
.breadcrumb-nav {
  margin-bottom: 1.25rem;
}

.breadcrumb-list {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 0.5rem;
  list-style: none;
  font-size: 0.875rem;
  color: var(--ink-faint);
}

.breadcrumb-list a {
  color: var(--ink-soft);
}

.breadcrumb-list a:hover {
  color: var(--primary);
}

.breadcrumb-separator {
  color: var(--line);
}

.breadcrumb-current {
  color: var(--ink);
  font-weight: 600;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 2.5rem;
  align-items: center;
}

@media (min-width: 992px) {
  .hero-grid {
    grid-template-columns: minmax(0, 1.25fr) minmax(0, 0.95fr);
  }
}

.hero-title-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 0.85rem;
  background: var(--primary-light);
  color: var(--primary-dark);
  border-radius: var(--radius-pill);
  font-size: 0.8125rem;
  font-weight: 600;
  margin-bottom: 1rem;
  border: 1px solid rgba(79, 70, 229, 0.15);
}

.hero-pulse {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 rgba(124, 58, 237, 0.4);
  animation: pulseGlow 2s infinite;
}

@keyframes pulseGlow {
  0% {
    box-shadow: 0 0 0 0 rgba(124, 58, 237, 0.6);
  }
  70% {
    box-shadow: 0 0 0 8px rgba(124, 58, 237, 0);
  }
  100% {
    box-shadow: 0 0 0 0 rgba(124, 58, 237, 0);
  }
}

.hero-h1 {
  font-size: clamp(2.15rem, 5vw, 3.4rem);
  font-weight: 800;
  color: var(--ink);
  letter-spacing: -0.035em;
  margin-bottom: 1rem;
  line-height: 1.15;
}

.hero-description {
  font-size: clamp(1rem, 2vw, 1.15rem);
  color: var(--ink-soft);
  margin-bottom: 1.75rem;
  line-height: 1.6;
}

.hero-features-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem 1.25rem;
}

.hero-feature-tag {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.85rem;
  color: var(--ink-soft);
  font-weight: 500;
}

.hero-feature-tag svg {
  color: var(--primary);
  width: 16px;
  height: 16px;
}

/* 3D Visual in Hero - Lightweight CSS 3D */
.hero-visual-wrapper {
  perspective: 1000px;
  display: flex;
  justify-content: center;
  align-items: center;
  width: 100%;
  max-width: 100%;
}

.hero-3d-card {
  width: 100%;
  max-width: 440px;
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: 1.75rem;
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  transform-style: preserve-3d;
  transition: transform 0.3s cubic-bezier(0.2, 0, 0, 1);
  position: relative;
}

.hero-3d-card:hover {
  transform: rotateX(4deg) rotateY(-4deg) translateY(-4px);
}

.visual-node {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.15rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  margin-bottom: 0.75rem;
}

.visual-node-icon {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: var(--white);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.visual-node-content {
  flex: 1;
  min-width: 0;
}

.visual-node-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-faint);
  font-weight: 700;
}

.visual-node-val {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.visual-arrow-bridge {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0.35rem 0;
  color: var(--primary);
}

/* 9. LIVE TIMESTAMP TICKER BANNER */
.live-ticker-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow-md);
  margin-top: -2rem;
  margin-bottom: 3rem;
  position: relative;
  z-index: 10;
}

.live-ticker-header {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 1.5rem;
  padding-bottom: 1rem;
  border-bottom: 1px solid var(--line-soft);
}

.live-ticker-title {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 1.25rem;
  font-weight: 700;
}

.live-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.2rem 0.6rem;
  background: #ede9fe;
  color: var(--accent);
  border-radius: var(--radius-pill);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.live-badge::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  animation: pulseGlow 1.8s infinite;
}

.ticker-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-md);
  font-size: 0.875rem;
  font-weight: 600;
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
}

.btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3);
}

.btn-secondary {
  background: var(--bg-soft);
  color: var(--ink);
  border-color: var(--line);
}

.btn-secondary:hover {
  background: var(--line-soft);
  border-color: var(--ink-faint);
}

.btn-outline {
  background: transparent;
  border-color: var(--line);
  color: var(--ink-soft);
}

.btn-outline:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--bg-soft);
}

.btn-sm {
  padding: 0.4rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-icon-only {
  padding: 0.5rem;
  border-radius: var(--radius-md);
}

/* Live Ticker Grid */
.ticker-display-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
}

@media (min-width: 640px) {
  .ticker-display-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .ticker-display-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.ticker-metric-box {
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  padding: 1.15rem;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-width: 0;
  position: relative;
  transition: border-color var(--transition-fast);
}

.ticker-metric-box:hover {
  border-color: var(--primary);
}

.metric-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.5rem;
}

.metric-label {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--ink-faint);
  letter-spacing: 0.05em;
}

.metric-value {
  font-family: "JetBrains Mono", monospace;
  font-size: clamp(1.1rem, 2.5vw, 1.45rem);
  font-weight: 800;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
  line-height: 1.25;
  margin-bottom: 0.5rem;
}

.metric-sub {
  font-size: 0.8125rem;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
  word-break: break-word;
}

/* 10. MAIN TOOL WORKSPACE & TABS */
.workspace-tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  padding: 0.4rem;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  margin-bottom: 2rem;
}

.tab-btn {
  flex: 1 1 auto;
  min-width: 140px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.25rem;
  background: transparent;
  border: none;
  border-radius: var(--radius-md);
  font-size: 0.935rem;
  font-weight: 600;
  color: var(--ink-soft);
  cursor: pointer;
  transition: all var(--transition-fast);
}

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

.tab-btn.active {
  background: var(--white);
  color: var(--primary);
  box-shadow: var(--shadow-sm);
}

/* Tool Sections */
.tool-tab-panel {
  display: none;
}

.tool-tab-panel.active {
  display: block;
}

/* Tool Card Components */
.tool-grid-2col {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}

@media (min-width: 992px) {
  .tool-grid-2col {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.tool-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  padding: clamp(1.25rem, 3vw, 2rem);
  box-shadow: var(--shadow-sm);
  display: flex;
  flex-direction: column;
  min-width: 0;
  max-width: 100%;
}

.tool-card-header {
  margin-bottom: 1.5rem;
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 1rem;
}

.tool-card-title {
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.35rem;
}

.tool-card-subtitle {
  font-size: 0.875rem;
  color: var(--ink-soft);
}

/* Form Controls */
.form-group {
  margin-bottom: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.form-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.form-label-badge {
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--primary);
  background: var(--primary-light);
  padding: 0.15rem 0.5rem;
  border-radius: var(--radius-pill);
}

.input-wrapper {
  position: relative;
  display: flex;
  align-items: center;
  width: 100%;
  max-width: 100%;
}

.form-input,
.form-select {
  width: 100%;
  max-width: 100%;
  min-width: 0;
  padding: 0.75rem 1rem;
  background: var(--white);
  border: 1.5px solid var(--line);
  border-radius: var(--radius-md);
  font-size: 0.95rem;
  color: var(--ink);
  transition: all var(--transition-fast);
}

.form-input.mono {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.05rem;
  letter-spacing: -0.02em;
}

.form-input:focus,
.form-select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.15);
  outline: none;
}

.form-input.has-error {
  border-color: #dc2626;
  background: #fef2f2;
}

.form-error-msg {
  font-size: 0.8125rem;
  color: #dc2626;
  margin-top: 0.25rem;
  display: none;
}

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

.unit-selector-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.unit-pill {
  flex: 1 1 auto;
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-pill);
  color: var(--ink-soft);
  cursor: pointer;
  text-align: center;
  transition: all var(--transition-fast);
}

.unit-pill:hover {
  border-color: var(--primary);
  color: var(--primary);
}

.unit-pill.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
}

.quick-presets-row {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-top: 0.5rem;
}

.preset-chip {
  padding: 0.35rem 0.65rem;
  font-size: 0.775rem;
  font-weight: 600;
  background: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.preset-chip:hover {
  background: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
}

/* Results Display Box */
.results-card-container {
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
  min-width: 0;
  max-width: 100%;
}

.result-row {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  padding-bottom: 0.75rem;
  border-bottom: 1px solid var(--line-soft);
  min-width: 0;
}

.result-row:last-child {
  border-bottom: none;
  padding-bottom: 0;
}

@media (min-width: 480px) {
  .result-row {
    flex-direction: row;
    align-items: center;
    justify-content: space-between;
  }
}

.result-key {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.result-val-group {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-width: 0;
}

.result-val {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.935rem;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
  word-break: break-word;
}

.copy-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 32px;
  height: 32px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--line);
  background: var(--white);
  color: var(--ink-soft);
  cursor: pointer;
  flex-shrink: 0;
  transition: all var(--transition-fast);
}

.copy-btn:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-light);
}

.copy-btn.copied {
  background: #10b981;
  color: var(--white);
  border-color: #10b981;
}

/* 11. ADVANCED CALCULATORS (DIFFERENCE & ADD/SUBTRACT) */
.calc-grid-inputs {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1rem;
  margin-bottom: 1.25rem;
}

@media (min-width: 640px) {
  .calc-grid-inputs {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

.difference-summary-banner {
  background: linear-gradient(135deg, var(--primary-light) 0%, #faf8ff 100%);
  border: 1px solid rgba(79, 70, 229, 0.2);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  margin-bottom: 1.25rem;
}

.diff-hero-text {
  font-size: clamp(1.2rem, 3vw, 1.6rem);
  font-weight: 800;
  color: var(--primary-dark);
  font-family: "Lexend", sans-serif;
  overflow-wrap: anywhere;
  word-break: break-word;
  margin-bottom: 0.25rem;
}

.diff-breakdown-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 0.75rem;
}

@media (min-width: 640px) {
  .diff-breakdown-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.diff-unit-box {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 0.75rem;
  text-align: center;
  min-width: 0;
}

.diff-unit-val {
  font-family: "JetBrains Mono", monospace;
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  overflow-wrap: anywhere;
}

.diff-unit-label {
  font-size: 0.75rem;
  color: var(--ink-faint);
  font-weight: 600;
  text-transform: uppercase;
}

/* 12. HISTORY & SAVED FAVORITES */
.history-controls-bar {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.history-list {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  max-height: 480px;
  overflow-y: auto;
  padding-right: 0.25rem;
}

.history-item-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  transition: border-color var(--transition-fast);
}

.history-item-card:hover {
  border-color: var(--primary);
}

.history-item-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.5rem;
}

.history-item-time {
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.history-item-data {
  display: flex;
  flex-direction: column;
  gap: 0.25rem;
}

.history-raw-input {
  font-family: "JetBrains Mono", monospace;
  font-size: 0.935rem;
  font-weight: 700;
  color: var(--primary);
  overflow-wrap: anywhere;
}

.history-converted-val {
  font-size: 0.875rem;
  color: var(--ink-soft);
  overflow-wrap: anywhere;
}

.history-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: 0.25rem;
}

.history-empty-msg {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--ink-faint);
  font-size: 0.95rem;
}

/* 13. CODE & API SNIPPETS SECTION */
.code-snippets-section {
  padding: 4rem 0;
  border-top: 1px solid var(--line-soft);
}

.code-tabs-nav {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

.code-tab-btn {
  padding: 0.45rem 0.85rem;
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.code-tab-btn.active {
  background: var(--primary);
  color: var(--white);
  border-color: var(--primary);
}

.code-snippet-box {
  background: #1b1838;
  border: 1px solid #2b2655;
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  color: #e2e0f5;
  font-family: "JetBrains Mono", monospace;
  font-size: 0.875rem;
  line-height: 1.6;
  overflow-x: auto;
  max-width: 100%;
  position: relative;
}

.code-snippet-box pre {
  margin: 0;
  white-space: pre;
}

.copy-code-btn {
  position: absolute;
  top: 0.75rem;
  right: 0.75rem;
  background: rgba(255, 255, 255, 0.1);
  color: #fff;
  border: none;
  padding: 0.35rem 0.75rem;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  cursor: pointer;
  font-family: "Inter", sans-serif;
}

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

/* 14. EDUCATIONAL CONTENT SECTION */
.educational-section {
  padding: 4rem 0;
  background: var(--white);
  border-top: 1px solid var(--line-soft);
}

.article-container {
  max-width: 860px;
  margin: 0 auto;
}

.geo-answer-box {
  background: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 1.5rem;
  margin: 2rem 0;
}

.geo-answer-box h3 {
  font-size: 1.15rem;
  color: var(--primary-dark);
  margin-bottom: 0.5rem;
}

.geo-answer-box p {
  color: var(--ink);
  font-size: 1.05rem;
  line-height: 1.6;
  margin: 0;
}

.educational-section h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  margin-top: 2.75rem;
  margin-bottom: 1.25rem;
  color: var(--ink);
}

.educational-section h3 {
  font-size: clamp(1.25rem, 2.5vw, 1.5rem);
  margin-top: 2rem;
  margin-bottom: 0.85rem;
  color: var(--ink);
}

.educational-section p {
  margin-bottom: 1.25rem;
  color: var(--ink-soft);
  font-size: 1.025rem;
  line-height: 1.75;
}

.educational-section ul,
.educational-section ol {
  margin-bottom: 1.5rem;
  padding-left: 1.5rem;
  color: var(--ink-soft);
  font-size: 1.025rem;
}

.educational-section li {
  margin-bottom: 0.5rem;
}

/* Responsive Table */
.table-responsive-wrapper {
  width: 100%;
  overflow-x: auto;
  margin: 2rem 0;
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  background: var(--white);
}

.responsive-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.935rem;
  text-align: left;
}

.responsive-table th {
  background: var(--bg-soft);
  padding: 0.85rem 1rem;
  font-weight: 700;
  color: var(--ink);
  border-bottom: 1px solid var(--line);
  white-space: nowrap;
}

.responsive-table td {
  padding: 0.85rem 1rem;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
}

.responsive-table tr:last-child td {
  border-bottom: none;
}

.responsive-table td.mono {
  font-family: "JetBrains Mono", monospace;
  color: var(--ink);
  font-weight: 600;
}

/* 15. FAQ ACCORDION SECTION */
.faq-section {
  padding: 4rem 0;
  background: var(--bg);
  border-top: 1px solid var(--line-soft);
}

.faq-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 3rem;
}

.faq-title {
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  margin-bottom: 0.75rem;
}

.faq-accordion-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item:hover {
  border-color: var(--primary);
}

.faq-trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  background: transparent;
  border: none;
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--ink);
  text-align: left;
  cursor: pointer;
  gap: 1rem;
}

.faq-chevron {
  width: 20px;
  height: 20px;
  color: var(--ink-faint);
  flex-shrink: 0;
  transition:
    transform var(--transition-fast),
    color var(--transition-fast);
}

.faq-item[open] .faq-chevron {
  transform: rotate(180deg);
  color: var(--primary);
}

.faq-content {
  padding: 0 1.5rem 1.25rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* 16. RELATED TOOLS SECTION */
.related-tools-section {
  padding: 4rem 0;
  background: var(--bg-soft);
  border-top: 1px solid var(--line);
}

.related-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.25rem;
  margin-top: 2rem;
}

@media (min-width: 640px) {
  .related-grid {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }
}

@media (min-width: 1024px) {
  .related-grid {
    grid-template-columns: repeat(4, minmax(0, 1fr));
  }
}

.related-card {
  background: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.related-card:hover {
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
}

.related-card-title {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 0.5rem;
}

.related-card-desc {
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.5;
  margin-bottom: 1rem;
}

.related-card-link {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

/* 17. FOOTER — LOCKED SPECIFICATION */
.site-footer {
  background: #110f24;
  color: #c5c2e0;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid #232042;
}

.footer-top-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

@media (min-width: 768px) {
  .footer-top-grid {
    grid-template-columns: minmax(0, 1.5fr) minmax(0, 1fr) minmax(
        0,
        1fr
      ) minmax(0, 1fr);
  }
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.footer-logo {
  font-family: "Lexend", sans-serif;
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
}

.footer-bio {
  font-size: 0.935rem;
  line-height: 1.6;
  color: #a39eb8;
  max-width: 320px;
}

.footer-social-link {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  color: var(--white);
  background: #201c40;
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  font-size: 0.875rem;
  width: fit-content;
  transition: background var(--transition-fast);
}

.footer-social-link:hover {
  background: var(--primary);
  color: var(--white);
}

.footer-col-title {
  font-family: "Lexend", sans-serif;
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 1.25rem;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.65rem;
}

.footer-links-list a {
  color: #a39eb8;
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom-bar {
  border-top: 1px solid #232042;
  padding-top: 2rem;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  font-size: 0.875rem;
  color: #817c9c;
}

.footer-tagline {
  color: #b5b0cf;
  font-weight: 500;
}

/* 18. REDUCED MOTION */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}