/* ==========================================================================
   HUZIKIT.COM — QR CODE GENERATOR STYLESHEET
   Design System: Huzikit Modern Purple / Violet Identity
   Strict Color Palette: Ink, Soft Ink, Primary Violet, Accent Purple, Light Neutral
   No Blue / No Cyan / No Teal
   ========================================================================== */

:root {
  /* Huzikit Strict Brand Palette */
  --ink: #15132b;
  --ink-soft: #4d4a6b;
  --ink-faint: #8985a8;

  --bg: #fcfbff;
  --bg-soft: #f4f2ff;
  --bg-card: #ffffff;

  --line: #e7e4f6;
  --line-soft: #f0eefb;

  --primary: #4f46e5;
  --primary-dark: #3b33c4;
  --primary-light: #eeebff;
  --primary-glow: rgba(79, 70, 229, 0.18);

  --accent: #7c3aed;
  --accent-dark: #6323d1;
  --accent-light: #f3e8ff;

  --white: #ffffff;

  /* Feedback Colors (Tuned to Violet/Berry Undertones) */
  --success: #10b981;
  --success-bg: #ecfdf5;
  --warning: #f59e0b;
  --warning-bg: #fffbeb;
  --error: #e11d48;
  --error-bg: #fff1f2;

  /* Typography */
  --font-heading: "Lexend", system-ui, -apple-system, sans-serif;
  --font-body: "Inter", system-ui, -apple-system, sans-serif;

  /* Sizing & Geometry */
  --radius-xs: 6px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Elevation Shadows */
  --shadow-xs: 0 1px 2px rgba(21, 19, 43, 0.04);
  --shadow-sm: 0 2px 8px rgba(21, 19, 43, 0.05);
  --shadow-md: 0 6px 20px rgba(21, 19, 43, 0.07);
  --shadow-lg: 0 14px 36px rgba(79, 70, 229, 0.12);
  --shadow-xl: 0 24px 56px rgba(21, 19, 43, 0.14);
  --shadow-focus: 0 0 0 3px rgba(124, 58, 237, 0.28);

  /* Layout Boundaries */
  --container-max: 1280px;
  --transition: all 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Base Reset & Box Sizing */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-body);
  color: var(--ink);
  background-color: var(--bg);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* Accessibility Focus States */
a,
button,
input,
select,
textarea {
  font-family: inherit;
  color: inherit;
}

:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

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

/* Container Constraint */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-left: auto;
  margin-right: auto;
  padding-left: 24px;
  padding-right: 24px;
}

@media (max-width: 768px) {
  .container {
    padding-left: 16px;
    padding-right: 16px;
  }
}

/* ==========================================================================
   NAVIGATION BAR
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(252, 251, 255, 0.94);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  transition: var(--transition);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
  gap: 16px;
}

/* Brand Logo */
.brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.35rem;
  color: var(--ink);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.brand-icon {
  width: 36px;
  height: 36px;
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
  box-shadow: 0 4px 12px var(--primary-glow);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

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

/* Desktop Navigation */
.desktop-nav {
  display: flex;
  align-items: center;
  gap: 8px;
}

.nav-item {
  position: relative;
}

.nav-trigger,
.nav-direct-link {
  display: flex;
  align-items: center;
  gap: 6px;
  padding: 8px 14px;
  font-size: 0.925rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-trigger:hover,
.nav-direct-link:hover,
.nav-trigger:focus-visible,
.nav-direct-link:focus-visible {
  color: var(--primary);
  background-color: var(--primary-light);
}

.nav-trigger .chevron {
  width: 14px;
  height: 14px;
  transition: transform 0.2s ease;
}

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

/* Navigation Dropdown Menu */
.nav-dropdown {
  position: absolute;
  top: calc(100% + 4px);
  left: 0;
  width: 270px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg);
  padding: 8px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition:
    opacity 0.2s ease,
    transform 0.2s ease,
    visibility 0.2s;
  z-index: 110;
}

.nav-item:hover .nav-dropdown,
.nav-item:focus-within .nav-dropdown {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-link {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 8px 12px;
  font-size: 0.885rem;
  font-weight: 500;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: var(--transition);
}

.dropdown-link:hover,
.dropdown-link:focus-visible {
  color: var(--primary);
  background-color: var(--bg-soft);
  transform: translateX(3px);
}

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

.dropdown-link .tool-dot {
  width: 6px;
  height: 6px;
  border-radius: var(--radius-full);
  background-color: var(--line);
  transition: background-color 0.2s;
}

.dropdown-link:hover .tool-dot,
.dropdown-link.active-link .tool-dot {
  background-color: var(--accent);
}

/* Header Utilities */
.header-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.search-trigger-btn {
  display: flex;
  align-items: center;
  gap: 10px;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 8px 14px;
  font-size: 0.875rem;
  color: var(--ink-faint);
  transition: var(--transition);
}

.search-trigger-btn:hover,
.search-trigger-btn:focus-visible {
  border-color: var(--accent);
  background-color: var(--white);
  color: var(--ink-soft);
  box-shadow: var(--shadow-sm);
}

.search-trigger-btn svg {
  width: 16px;
  height: 16px;
  color: var(--ink-soft);
}

.kbd-shortcut {
  font-size: 0.72rem;
  font-family: inherit;
  font-weight: 600;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: 4px;
  padding: 2px 6px;
  color: var(--ink-faint);
}

/* Mobile Hamburger Button */
.hamburger-btn {
  display: none;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  align-items: center;
  justify-content: center;
  color: var(--ink);
  transition: var(--transition);
}

.hamburger-btn:hover,
.hamburger-btn:focus-visible {
  background-color: var(--primary-light);
  color: var(--primary);
}

.hamburger-icon {
  width: 22px;
  height: 22px;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: space-around;
}

.hamburger-bar {
  width: 100%;
  height: 2px;
  background-color: currentColor;
  border-radius: 2px;
  transition:
    transform 0.25s ease,
    opacity 0.25s ease;
}

.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(2) {
  opacity: 0;
}

.hamburger-btn[aria-expanded="true"] .hamburger-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Mobile Navigation Drawer */
.mobile-nav-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(21, 19, 43, 0.45);
  backdrop-filter: blur(4px);
  z-index: 190;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.25s ease,
    visibility 0.25s;
}

.mobile-nav-backdrop.open {
  opacity: 1;
  visibility: visible;
}

.mobile-nav-drawer {
  position: fixed;
  top: 0;
  right: 0;
  bottom: 0;
  width: 320px;
  max-width: 85vw;
  background-color: var(--bg-card);
  z-index: 200;
  box-shadow: var(--shadow-xl);
  transform: translateX(100%);
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
}

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

.mobile-nav-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 20px;
  border-bottom: 1px solid var(--line);
}

.mobile-nav-body {
  flex: 1;
  overflow-y: auto;
  padding: 16px 20px 32px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.mobile-accordion-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
}

.mobile-accordion-btn .chevron {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.mobile-accordion-btn[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.mobile-accordion-panel {
  display: none;
  padding: 6px 0 10px 12px;
  flex-direction: column;
  gap: 4px;
}

.mobile-accordion-panel.open {
  display: flex;
}

.mobile-sub-link {
  display: block;
  padding: 8px 12px;
  font-size: 0.885rem;
  color: var(--ink-soft);
  text-decoration: none;
  border-radius: var(--radius-xs);
  transition: var(--transition);
}

.mobile-sub-link:hover,
.mobile-sub-link:focus-visible {
  color: var(--primary);
  background-color: var(--bg-soft);
}

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

/* ==========================================================================
   GLOBAL SEARCH MODAL
   ========================================================================== */
.search-modal-backdrop {
  position: fixed;
  inset: 0;
  background-color: rgba(21, 19, 43, 0.55);
  backdrop-filter: blur(6px);
  z-index: 300;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 60px 16px 24px;
  opacity: 0;
  visibility: hidden;
  transition:
    opacity 0.22s ease,
    visibility 0.22s;
}

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

.search-modal {
  width: 100%;
  max-width: 600px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-xl);
  overflow: hidden;
  display: flex;
  flex-direction: column;
  transform: translateY(-12px);
  transition: transform 0.22s cubic-bezier(0.16, 1, 0.3, 1);
}

.search-modal-backdrop.open .search-modal {
  transform: translateY(0);
}

.search-input-wrapper {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px 20px;
  border-bottom: 1px solid var(--line);
}

.search-input-wrapper svg {
  width: 20px;
  height: 20px;
  color: var(--ink-faint);
  flex-shrink: 0;
}

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

.search-modal-input::placeholder {
  color: var(--ink-faint);
}

.search-close-btn {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-faint);
  padding: 4px 8px;
  border-radius: var(--radius-xs);
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  transition: var(--transition);
}

.search-close-btn:hover {
  color: var(--ink);
  border-color: var(--ink-soft);
}

.search-results-list {
  max-height: 380px;
  overflow-y: auto;
  padding: 12px;
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.search-result-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  text-decoration: none;
  color: var(--ink);
  transition: var(--transition);
}

.search-result-item:hover,
.search-result-item.selected {
  background-color: var(--primary-light);
  color: var(--primary-dark);
}

.search-item-info {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.search-item-title {
  font-weight: 600;
  font-size: 0.95rem;
}

.search-item-cat {
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.search-empty {
  padding: 32px 16px;
  text-align: center;
  color: var(--ink-faint);
  font-size: 0.95rem;
}

/* ==========================================================================
   HERO SECTION & 3D VISUAL
   ========================================================================== */
.hero-section {
  padding: 64px 0 48px;
  background: radial-gradient(
    circle at 50% 10%,
    rgba(124, 58, 237, 0.08) 0%,
    transparent 65%
  );
  border-bottom: 1px solid var(--line-soft);
  overflow: hidden;
}

.hero-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  gap: 48px;
}

.hero-content {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  font-size: 0.825rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  border: 1px solid var(--line);
  align-self: flex-start;
}

.hero-badge .pulse-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(124, 58, 237, 0.2);
}

.hero-title {
  font-family: var(--font-heading);
  font-size: clamp(2.2rem, 4vw, 3.25rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--ink);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-size: 1.125rem;
  color: var(--ink-soft);
  line-height: 1.65;
  max-width: 580px;
}

.hero-features-list {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
  list-style: none;
  margin-top: 8px;
}

.hero-feature-item {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.885rem;
  font-weight: 500;
  color: var(--ink-soft);
}

.hero-feature-item svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
  flex-shrink: 0;
}

/* 3D Floating Hero Visual */
.hero-visual-stage {
  perspective: 1000px;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 20px;
}

.hero-3d-card {
  width: 320px;
  height: 380px;
  background: linear-gradient(145deg, #ffffff 0%, #f6f3fe 100%);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow:
    0 24px 60px rgba(79, 70, 229, 0.16),
    0 4px 12px rgba(21, 19, 43, 0.04);
  padding: 24px;
  position: relative;
  transform-style: preserve-3d;
  transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: space-between;
}

.hero-card-header {
  width: 100%;
  display: flex;
  justify-content: space-between;
  align-items: center;
  transform: translateZ(25px);
}

.hero-chip {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--primary);
  background-color: var(--primary-light);
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.hero-dots {
  display: flex;
  gap: 5px;
}

.hero-dots span {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background-color: var(--line);
}

.hero-qr-simulated {
  width: 190px;
  height: 190px;
  background-color: var(--white);
  border-radius: var(--radius-md);
  border: 1px solid var(--line);
  box-shadow: var(--shadow-sm);
  padding: 14px;
  position: relative;
  transform: translateZ(40px);
  display: flex;
  align-items: center;
  justify-content: center;
  overflow: hidden;
}

.hero-qr-simulated svg {
  width: 100%;
  height: 100%;
  fill: var(--ink);
}

.hero-laser-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(
    90deg,
    transparent 0%,
    var(--accent) 50%,
    transparent 100%
  );
  box-shadow: 0 0 10px var(--accent);
  animation: laserScan 3s ease-in-out infinite alternate;
}

@keyframes laserScan {
  0% {
    top: 6px;
  }
  100% {
    top: calc(100% - 9px);
  }
}

.hero-card-footer {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  transform: translateZ(20px);
  padding-top: 10px;
  border-top: 1px solid var(--line-soft);
  font-size: 0.8rem;
  color: var(--ink-faint);
}

.hero-floating-tag {
  position: absolute;
  background-color: var(--white);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  padding: 6px 14px;
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--ink-soft);
  box-shadow: var(--shadow-md);
  display: flex;
  align-items: center;
  gap: 6px;
  transform: translateZ(50px);
}

.hero-floating-tag.tag-top-right {
  top: -16px;
  right: -20px;
}

.hero-floating-tag.tag-bottom-left {
  bottom: -16px;
  left: -20px;
}

/* Respect Reduced Motion */
@media (prefers-reduced-motion: reduce) {
  .hero-laser-line {
    animation: none;
  }
  .hero-3d-card {
    transition: none;
    transform: none !important;
  }
}

/* ==========================================================================
   MAIN QR GENERATOR APPLICATION WORKSPACE
   Split Layout: Left (Config) & Right (Live Preview)
   ========================================================================== */
.generator-workspace {
  padding: 48px 0 64px;
}

.app-grid {
  display: grid;
  grid-template-columns: 1.18fr 0.82fr;
  gap: 36px;
  align-items: flex-start;
}

/* --------------------------------------------------------------------------
   LEFT PANEL: CONFIGURATION
   -------------------------------------------------------------------------- */
.config-card {
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.config-section-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 10px;
}

.config-section-title .section-icon {
  width: 24px;
  height: 24px;
  color: var(--primary);
}

/* QR Type Selector Tabs */
.qr-types-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.qr-types-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 8px;
}

.type-btn {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 12px 6px;
  border-radius: var(--radius-md);
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  font-size: 0.825rem;
  font-weight: 600;
  transition: var(--transition);
  text-align: center;
  min-height: 72px;
}

.type-btn svg {
  width: 20px;
  height: 20px;
  color: var(--ink-faint);
  transition: var(--transition);
}

.type-btn:hover {
  background-color: var(--white);
  border-color: var(--primary);
  color: var(--primary);
  box-shadow: var(--shadow-xs);
}

.type-btn:hover svg {
  color: var(--primary);
}

.type-btn.active {
  background-color: var(--primary-light);
  border-color: var(--primary);
  color: var(--primary-dark);
  box-shadow: 0 0 0 2px var(--primary-glow);
}

.type-btn.active svg {
  color: var(--primary-dark);
}

/* Dynamic Input Forms */
.form-panels-container {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.type-form-panel {
  display: none;
  flex-direction: column;
  gap: 16px;
}

.type-form-panel.active {
  display: flex;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px;
}

.form-label {
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--ink);
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.form-label-optional {
  font-size: 0.78rem;
  font-weight: 400;
  color: var(--ink-faint);
}

.form-input,
.form-textarea,
.form-select {
  width: 100%;
  padding: 11px 14px;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  color: var(--ink);
  transition: var(--transition);
}

.form-input:hover,
.form-textarea:hover,
.form-select:hover {
  background-color: var(--white);
  border-color: var(--ink-faint);
}

.form-input:focus,
.form-textarea:focus,
.form-select:focus {
  outline: none;
  background-color: var(--white);
  border-color: var(--accent);
  box-shadow: var(--shadow-focus);
}

.form-textarea {
  resize: vertical;
  min-height: 96px;
  line-height: 1.5;
}

.form-checkbox-label {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.885rem;
  font-weight: 500;
  color: var(--ink-soft);
  cursor: pointer;
  margin-top: 4px;
}

.form-checkbox-label input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--primary);
  border-radius: 4px;
  cursor: pointer;
}

.field-error-msg {
  font-size: 0.8rem;
  color: var(--error);
  font-weight: 500;
  display: none;
}

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

.field-hint {
  font-size: 0.8rem;
  color: var(--ink-faint);
}

/* Accordion Customization Options */
.customization-accordion {
  display: flex;
  flex-direction: column;
  gap: 12px;
  border-top: 1px solid var(--line);
  padding-top: 24px;
}

.accordion-item {
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--white);
}

.accordion-header-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 18px;
  background-color: var(--bg-soft);
  font-family: var(--font-heading);
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--ink);
  transition: var(--transition);
}

.accordion-header-btn:hover {
  background-color: var(--line-soft);
}

.accordion-header-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.accordion-header-left svg {
  width: 18px;
  height: 18px;
  color: var(--primary);
}

.accordion-header-btn .chevron {
  width: 16px;
  height: 16px;
  transition: transform 0.25s ease;
}

.accordion-header-btn[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.accordion-content {
  display: none;
  padding: 18px;
  flex-direction: column;
  gap: 16px;
  background-color: var(--white);
  border-top: 1px solid var(--line);
}

.accordion-content.open {
  display: flex;
}

/* Color Controls */
.color-picker-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.color-input-combo {
  display: flex;
  align-items: center;
  gap: 8px;
}

.color-swatch-input {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  width: 44px;
  height: 44px;
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  cursor: pointer;
  background: none;
  padding: 0;
  overflow: hidden;
}

.color-swatch-input::-webkit-color-swatch-wrapper {
  padding: 0;
}

.color-swatch-input::-webkit-color-swatch {
  border: none;
  border-radius: var(--radius-sm);
}

.color-text-input {
  flex: 1;
  text-transform: uppercase;
  font-family: monospace;
  font-size: 0.9rem;
}

.color-preset-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 4px;
}

.preset-pill-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-full);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--ink-soft);
  transition: var(--transition);
}

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

.preset-color-dot {
  width: 10px;
  height: 10px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(0, 0, 0, 0.1);
}

/* Contrast Warning Badge */
.contrast-warning {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  background-color: var(--warning-bg);
  border: 1px solid #fde68a;
  color: #92400e;
  font-size: 0.825rem;
  line-height: 1.45;
}

.contrast-warning.visible {
  display: flex;
}

.contrast-warning svg {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  color: #b45309;
}

/* Logo Upload Zone */
.logo-upload-zone {
  border: 2px dashed var(--line);
  border-radius: var(--radius-md);
  padding: 24px 16px;
  text-align: center;
  background-color: var(--bg-soft);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
}

.logo-upload-zone:hover,
.logo-upload-zone.drag-over {
  border-color: var(--accent);
  background-color: var(--primary-light);
}

.logo-upload-zone svg {
  width: 32px;
  height: 32px;
  color: var(--ink-faint);
}

.logo-upload-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink);
}

.logo-upload-hint {
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.logo-preview-card {
  display: none;
  align-items: center;
  justify-content: space-between;
  padding: 12px 16px;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
}

.logo-preview-card.visible {
  display: flex;
}

.logo-preview-meta {
  display: flex;
  align-items: center;
  gap: 12px;
}

.logo-preview-thumb {
  width: 44px;
  height: 44px;
  object-fit: contain;
  border-radius: var(--radius-xs);
  background-color: var(--white);
  border: 1px solid var(--line);
  padding: 2px;
}

.logo-preview-details {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.logo-name {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink);
  max-width: 180px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logo-size-info {
  font-size: 0.75rem;
  color: var(--ink-faint);
}

.remove-logo-btn {
  color: var(--error);
  padding: 6px;
  border-radius: var(--radius-xs);
  transition: var(--transition);
}

.remove-logo-btn:hover {
  background-color: var(--error-bg);
}

.remove-logo-btn svg {
  width: 18px;
  height: 18px;
}

/* Tool Execution Actions */
.tool-actions-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-top: 8px;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 20px;
  font-size: 0.95rem;
  font-weight: 600;
  border-radius: var(--radius-sm);
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
  color: var(--white);
  box-shadow: 0 4px 14px var(--primary-glow);
  flex: 1;
}

.btn-primary:hover {
  box-shadow: 0 6px 20px rgba(79, 70, 229, 0.3);
  transform: translateY(-1px);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-soft);
}

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

/* --------------------------------------------------------------------------
   RIGHT PANEL: LIVE PREVIEW & OUTPUT
   -------------------------------------------------------------------------- */
.preview-card {
  position: sticky;
  top: 96px;
  background-color: var(--bg-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 24px;
}

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

.preview-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--ink);
  display: flex;
  align-items: center;
  gap: 8px;
}

.status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.78rem;
  font-weight: 600;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background-color: var(--success-bg);
  color: var(--success);
  border: 1px solid rgba(16, 185, 129, 0.2);
}

.status-badge.error-state {
  background-color: var(--error-bg);
  color: var(--error);
  border-color: rgba(225, 29, 72, 0.2);
}

/* Canvas Display Stage */
.canvas-stage {
  width: 100%;
  aspect-ratio: 1 / 1;
  background-color: var(--bg-soft);
  border: 1px solid var(--line-soft);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 2px 6px rgba(21, 19, 43, 0.02);
}

#qrCanvas {
  max-width: 100%;
  max-height: 100%;
  object-fit: contain;
  border-radius: var(--radius-xs);
  transition: transform 0.2s ease;
  box-shadow: var(--shadow-sm);
}

/* Download & Export Controls */
.export-actions-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.btn-download {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  background-color: var(--primary-light);
  color: var(--primary-dark);
  border: 1px solid var(--line);
  transition: var(--transition);
}

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

.btn-copy {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 16px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  font-weight: 600;
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  color: var(--ink-soft);
  transition: var(--transition);
}

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

/* QR Technical Info Box */
.qr-info-panel {
  background-color: var(--bg-soft);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 16px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.info-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.info-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.info-val {
  font-size: 0.885rem;
  font-weight: 600;
  color: var(--ink);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

/* Toast Notifications */
.toast-notice {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%) translateY(100px);
  background-color: var(--ink);
  color: var(--white);
  padding: 12px 24px;
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-xl);
  font-size: 0.9rem;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 8px;
  z-index: 500;
  opacity: 0;
  transition:
    transform 0.3s cubic-bezier(0.16, 1, 0.3, 1),
    opacity 0.3s;
  pointer-events: none;
}

.toast-notice.show {
  transform: translateX(-50%) translateY(0);
  opacity: 1;
}

.toast-notice svg {
  width: 18px;
  height: 18px;
  color: var(--success);
}

/* ==========================================================================
   ANSWER-FIRST GEO & AI SEARCH OPTIMIZATION SECTIONS
   ========================================================================== */
.geo-answers-section {
  padding: 64px 0 32px;
  background-color: var(--white);
  border-top: 1px solid var(--line);
}

.section-badge-center {
  display: flex;
  justify-content: center;
  margin-bottom: 12px;
}

.section-headline {
  font-family: var(--font-heading);
  font-size: clamp(1.8rem, 3vw, 2.4rem);
  font-weight: 800;
  color: var(--ink);
  text-align: center;
  letter-spacing: -0.02em;
  margin-bottom: 12px;
}

.section-subhead {
  font-size: 1.05rem;
  color: var(--ink-soft);
  text-align: center;
  max-width: 680px;
  margin: 0 auto 48px;
}

.geo-cards-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
}

.geo-answer-card {
  background-color: var(--bg);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: 30px;
  display: flex;
  flex-direction: column;
  gap: 14px;
  transition: var(--transition);
}

.geo-answer-card:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--primary-light);
}

.geo-card-header {
  display: flex;
  align-items: center;
  gap: 12px;
}

.geo-icon-box {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  background-color: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
}

.geo-icon-box svg {
  width: 22px;
  height: 22px;
}

.geo-card-title {
  font-family: var(--font-heading);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--ink);
}

.geo-answer-body {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

/* Numbered Steps List */
.process-steps-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 6px;
  list-style: none;
}

.process-step-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  font-size: 0.925rem;
  color: var(--ink-soft);
}

.step-num {
  width: 24px;
  height: 24px;
  border-radius: var(--radius-full);
  background-color: var(--primary);
  color: var(--white);
  font-size: 0.78rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

/* ==========================================================================
   LONG-FORM HELPFUL CONTENT (1200-1700 Words)
   ========================================================================== */
.educational-section {
  padding: 64px 0;
  background-color: var(--bg);
}

.article-layout {
  max-width: 900px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.content-block {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.content-heading-2 {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--ink);
  letter-spacing: -0.02em;
  padding-bottom: 8px;
  border-bottom: 2px solid var(--primary-light);
}

.content-heading-3 {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--ink);
  margin-top: 10px;
}

.content-paragraph {
  font-size: 1.025rem;
  color: var(--ink-soft);
  line-height: 1.75;
}

.content-list {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding-left: 24px;
}

.content-list-item {
  font-size: 1rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

.content-list-item strong {
  color: var(--ink);
}

/* Comparison Table */
.table-wrapper {
  width: 100%;
  overflow-x: auto;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  background-color: var(--white);
  margin: 16px 0;
}

.qr-comparison-table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 0.925rem;
}

.qr-comparison-table th {
  background-color: var(--bg-soft);
  color: var(--ink);
  font-family: var(--font-heading);
  font-weight: 600;
  padding: 14px 18px;
  border-bottom: 2px solid var(--line);
  white-space: nowrap;
}

.qr-comparison-table td {
  padding: 14px 18px;
  border-bottom: 1px solid var(--line-soft);
  color: var(--ink-soft);
  vertical-align: top;
}

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

.qr-comparison-table tr:hover td {
  background-color: var(--bg-soft);
}

/* Highlight Box */
.callout-box {
  background-color: var(--primary-light);
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 20px 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.callout-title {
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--primary-dark);
}

.callout-desc {
  font-size: 0.95rem;
  color: var(--ink-soft);
  line-height: 1.6;
}

/* ==========================================================================
   FAQ SECTION (12 WORKING ACCORDIONS)
   ========================================================================== */
.faq-section {
  padding: 64px 0 80px;
  background-color: var(--white);
  border-top: 1px solid var(--line);
}

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

.faq-list {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

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

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

.faq-question-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 18px 22px;
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--ink);
  text-align: left;
  transition: var(--transition);
}

.faq-question-btn .chevron {
  width: 18px;
  height: 18px;
  color: var(--primary);
  transition: transform 0.25s ease;
  flex-shrink: 0;
  margin-left: 16px;
}

.faq-question-btn[aria-expanded="true"] .chevron {
  transform: rotate(180deg);
}

.faq-answer-panel {
  display: none;
  padding: 0 22px 20px;
  font-size: 0.975rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

.faq-answer-panel.open {
  display: block;
}

/* ==========================================================================
   DARK LUXURY FOOTER
   ========================================================================== */
.site-footer {
  background-color: #0e0c1e;
  color: #ddd9f3;
  padding: 72px 0 32px;
  border-top: 1px solid #232042;
  margin-top: auto;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 48px;
  margin-bottom: 56px;
}

.footer-brand-col {
  display: flex;
  flex-direction: column;
  gap: 18px;
}

.footer-brand-link {
  display: flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-heading);
  font-weight: 700;
  font-size: 1.4rem;
  color: var(--white);
  text-decoration: none;
}

.footer-bio {
  font-size: 0.925rem;
  line-height: 1.65;
  color: #9c98bd;
  max-width: 320px;
}

.footer-social-list {
  display: flex;
  gap: 12px;
  margin-top: 6px;
}

.footer-social-link {
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  background-color: #1a1733;
  border: 1px solid #2b2754;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ddd9f3;
  text-decoration: none;
  transition: var(--transition);
}

.footer-social-link:hover {
  background-color: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-2px);
}

.footer-social-link svg {
  width: 18px;
  height: 18px;
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  margin-bottom: 18px;
  letter-spacing: -0.01em;
}

.footer-links-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-nav-link {
  font-size: 0.885rem;
  color: #9c98bd;
  text-decoration: none;
  transition: var(--transition);
}

.footer-nav-link:hover {
  color: var(--white);
  transform: translateX(3px);
}

.footer-bottom {
  padding-top: 32px;
  border-top: 1px solid #1e1b38;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.825rem;
  color: #79749c;
  flex-wrap: wrap;
  gap: 16px;
}

/* ==========================================================================
   RESPONSIVE DESIGN (320px to 1920px)
   ========================================================================== */

/* 1200px Breakpoint */
@media (max-width: 1200px) {
  .app-grid {
    grid-template-columns: 1fr 1fr;
    gap: 28px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 36px;
  }
}

/* 992px Breakpoint */
@media (max-width: 992px) {
  .hero-grid {
    grid-template-columns: 1fr;
    gap: 40px;
    text-align: center;
  }

  .hero-content {
    align-items: center;
  }

  .hero-features-list {
    justify-content: center;
  }

  .app-grid {
    grid-template-columns: 1fr;
    gap: 36px;
  }

  .preview-card {
    position: static;
  }

  .desktop-nav {
    display: none;
  }

  .hamburger-btn {
    display: flex;
  }

  .geo-cards-grid {
    grid-template-columns: 1fr;
  }
}

/* 768px Breakpoint */
@media (max-width: 768px) {
  .header-inner {
    height: 64px;
  }

  .hero-section {
    padding: 44px 0 36px;
  }

  .config-card,
  .preview-card {
    padding: 24px 18px;
  }

  .qr-types-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .form-row {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .color-picker-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
    justify-content: center;
  }
}

/* 480px Breakpoint */
@media (max-width: 480px) {
  .kbd-shortcut {
    display: none;
  }

  .search-trigger-btn span {
    display: none;
  }

  .hero-3d-card {
    width: 280px;
    height: 350px;
  }

  .hero-qr-simulated {
    width: 160px;
    height: 160px;
  }

  .export-actions-grid {
    grid-template-columns: 1fr;
  }

  .tool-actions-bar {
    flex-direction: column;
    width: 100%;
  }

  .btn {
    width: 100%;
  }

  .qr-info-panel {
    grid-template-columns: 1fr;
  }
}

/* 360px and Below */
@media (max-width: 360px) {
  .qr-types-grid {
    grid-template-columns: 1fr;
  }
}