/* ==========================================================================
   SANKET QR - Production Stylesheet
   Modern, Minimalist, High-Performance CSS (Pure Vanilla)
   Mobile-First & 100% Responsive Architecture
   ========================================================================== */

:root {
  /* Color Palette - Premium White & Black Aesthetic */
  --bg-app: #ffffff;
  --bg-subtle: #f8fafc;
  --bg-card: #ffffff;
  --bg-elevated: #f1f5f9;
  --border-light: #e2e8f0;
  --border-focus: #0f172a;

  --text-main: #0f172a;
  --text-muted: #64748b;
  --text-dim: #94a3b8;
  --text-inverse: #ffffff;

  --primary: #0f172a;
  --primary-hover: #1e293b;
  --primary-active: #334155;
  --primary-rgb: 15, 23, 42;

  --accent-green: #10b981;
  --accent-green-bg: #ecfdf5;
  --accent-red: #ef4444;
  --accent-red-bg: #fef2f2;
  --accent-blue: #2563eb;
  --accent-blue-bg: #eff6ff;

  /* Typography */
  --font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Shadows */
  --shadow-xs: 0 1px 2px 0 rgba(15, 23, 42, 0.05);
  --shadow-sm: 0 2px 4px -1px rgba(15, 23, 42, 0.06), 0 1px 2px -1px rgba(15, 23, 42, 0.04);
  --shadow-md: 0 10px 25px -5px rgba(15, 23, 42, 0.07), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  --shadow-lg: 0 20px 35px -10px rgba(15, 23, 42, 0.1), 0 10px 15px -5px rgba(15, 23, 42, 0.05);
  --shadow-glow: 0 0 0 3px rgba(15, 23, 42, 0.15);

  /* Border Radii */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Layout */
  --header-height: 68px;
  --container-max-w: 1200px;
  --transition-fast: 160ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-normal: 240ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Global Reset & Strict Mobile Overflow Prevention */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-family: var(--font-sans);
  background-color: var(--bg-app);
  color: var(--text-main);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  scroll-behavior: smooth;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
}

body {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: radial-gradient(circle at 50% 0%, #f8fafc 0%, #ffffff 80%);
  background-attachment: fixed;
  color: var(--text-main);
  overflow-x: hidden;
  width: 100%;
  max-width: 100vw;
  position: relative;
}

a {
  color: inherit;
  text-decoration: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
  touch-action: manipulation;
}

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

/* ==========================================================================
   Header & Navigation (Fully Mobile Optimized & Safe Area Notch Support)
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-light);
  width: 100%;
  box-sizing: border-box;
  display: flex;
  align-items: center;
  padding-top: env(safe-area-inset-top, 0px);
  padding-left: env(safe-area-inset-left, 0px);
  padding-right: env(safe-area-inset-right, 0px);
  min-height: calc(var(--header-height) + env(safe-area-inset-top, 0px));
}

.header-container {
  width: 100%;
  max-width: var(--container-max-w);
  margin: 0 auto;
  padding: 0 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  box-sizing: border-box;
  gap: 8px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 1.15rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  color: var(--text-main);
  text-decoration: none;
  transition: opacity var(--transition-fast);
  flex-shrink: 0;
}

.brand-link:hover {
  opacity: 0.88;
}

.brand-logo-img {
  height: 32px;
  width: auto;
  display: block;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.nav-item {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 12px;
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

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

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

.badge-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 10px;
  background: var(--accent-green-bg);
  color: #065f46;
  font-size: 0.75rem;
  font-weight: 600;
  border-radius: var(--radius-full);
  border: 1px solid rgba(16, 185, 129, 0.2);
  white-space: nowrap;
}

.badge-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--accent-green);
  animation: pulse-dot 2s infinite ease-in-out;
}

@keyframes pulse-dot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.4); opacity: 0.6; }
}

@media (max-width: 768px) {
  .site-header {
    /* Push content comfortably below the status bar, clock, notch, and battery icons */
    padding-top: max(env(safe-area-inset-top, 0px), 24px);
    padding-bottom: 8px;
    height: auto;
    min-height: calc(56px + max(env(safe-area-inset-top, 0px), 24px));
  }
  .site-header .badge-tag {
    display: none !important;
  }
  .header-container {
    padding: 2px 12px;
  }
}

/* Standalone PWA, Home Screen App, Full-Screen Webview mode */
@media (display-mode: standalone), (display-mode: fullscreen), (display-mode: minimal-ui) {
  .site-header {
    padding-top: max(env(safe-area-inset-top, 0px), 36px) !important;
    padding-bottom: 10px;
    height: auto !important;
    min-height: calc(56px + max(env(safe-area-inset-top, 0px), 36px)) !important;
  }
}

@media (max-width: 480px) {
  .brand-logo-img {
    height: 26px;
  }
  .nav-links {
    gap: 4px;
  }
  .nav-item {
    padding: 6px 9px;
    font-size: 0.775rem;
    gap: 4px;
  }
  .nav-item svg {
    width: 14px;
    height: 14px;
  }
}

/* ==========================================================================
   Main Layout & Hero Section
   ========================================================================== */
.main-wrapper {
  flex: 1;
  max-width: var(--container-max-w);
  width: 100%;
  margin: 0 auto;
  padding: 32px 16px 64px;
  box-sizing: border-box;
  min-width: 0;
}

.hero-banner {
  text-align: center;
  margin-bottom: 32px;
  width: 100%;
  box-sizing: border-box;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background-color: var(--bg-elevated);
  border: 1px solid var(--border-light);
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 14px;
  max-width: 100%;
  box-sizing: border-box;
}

.hero-title {
  font-size: clamp(1.75rem, 5vw, 3.25rem);
  font-weight: 800;
  letter-spacing: -0.035em;
  line-height: 1.15;
  color: var(--text-main);
  margin-bottom: 12px;
  word-break: break-word;
}

.hero-subtitle {
  font-size: clamp(0.95rem, 2vw, 1.15rem);
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
  font-weight: 400;
  line-height: 1.6;
}

/* Grid Layout for Generator */
.generator-grid,
.scanner-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
  align-items: start;
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
}

.generator-grid > *,
.scanner-grid > * {
  min-width: 0;
  max-width: 100%;
  box-sizing: border-box;
}

@media (min-width: 960px) {
  .generator-grid {
    grid-template-columns: 1.15fr 0.85fr;
    gap: 32px;
  }
  .scanner-grid {
    grid-template-columns: 1.1fr 0.9fr;
    gap: 32px;
  }
}

/* ==========================================================================
   Cards & Surfaces
   ========================================================================== */
.card-panel {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 24px;
  transition: box-shadow var(--transition-normal);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  min-width: 0;
}

.card-panel:hover {
  box-shadow: var(--shadow-md);
}

.card-header-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 20px;
  padding-bottom: 14px;
  border-bottom: 1px solid var(--border-light);
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

.card-title {
  font-size: 1.1rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  display: flex;
  align-items: center;
  gap: 8px;
  min-width: 0;
}

@media (max-width: 480px) {
  .card-header-row {
    flex-wrap: wrap;
    gap: 8px;
  }
}

/* ==========================================================================
   Input Type Tabs (Future-ready Extensible Architecture)
   ========================================================================== */
.tabs-scroll-wrapper {
  width: 100%;
  max-width: 100%;
  overflow-x: auto;
  margin-bottom: 20px;
  padding-bottom: 4px;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
  box-sizing: border-box;
}

.tabs-scroll-wrapper::-webkit-scrollbar {
  display: none;
}

.tabs-nav {
  display: flex;
  gap: 4px;
  background-color: var(--bg-elevated);
  padding: 4px;
  border-radius: var(--radius-md);
  min-width: max-content;
}

.tab-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: 0.825rem;
  font-weight: 600;
  color: var(--text-muted);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.tab-btn svg {
  width: 15px;
  height: 15px;
  stroke-width: 2.2;
}

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

.tab-btn.active {
  background: var(--bg-card);
  color: var(--text-main);
  box-shadow: var(--shadow-xs);
}

/* Tab Panels */
.tab-content {
  display: none;
  width: 100%;
  box-sizing: border-box;
}

.tab-content.active {
  display: block;
  animation: fadeIn 200ms ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Form Controls, Inputs, and Fields
   ========================================================================== */
.form-group {
  margin-bottom: 16px;
  width: 100%;
  box-sizing: border-box;
}

.form-label {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
  gap: 8px;
}

.label-hint {
  font-size: 0.75rem;
  font-weight: 400;
  color: var(--text-muted);
}

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

.input-icon-left {
  position: absolute;
  left: 14px;
  color: var(--text-muted);
  pointer-events: none;
  width: 18px;
  height: 18px;
}

.input-field {
  width: 100%;
  max-width: 100%;
  height: 48px;
  padding: 12px 14px;
  font-size: 0.95rem;
  background-color: var(--bg-subtle);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-main);
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.input-field.has-icon-left {
  padding-left: 42px;
}

.input-field.has-action-right {
  padding-right: 76px;
}

.input-field:focus {
  outline: none;
  background-color: #ffffff;
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

.input-field::placeholder {
  color: var(--text-dim);
}

.input-action-right {
  position: absolute;
  right: 6px;
  display: flex;
  align-items: center;
  gap: 4px;
}

.input-inline-btn {
  padding: 5px 10px;
  border-radius: var(--radius-sm);
  font-size: 0.75rem;
  font-weight: 600;
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.input-inline-btn:hover {
  background: var(--bg-elevated);
  color: var(--text-main);
}

.input-clear-btn {
  display: none;
  padding: 6px;
  color: var(--text-dim);
  border-radius: 50%;
  transition: color var(--transition-fast);
}

.input-clear-btn:hover {
  color: var(--text-main);
}

.input-clear-btn.visible {
  display: inline-flex;
}

.textarea-field {
  width: 100%;
  max-width: 100%;
  padding: 12px 14px;
  font-size: 0.925rem;
  background-color: var(--bg-subtle);
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  color: var(--text-main);
  resize: vertical;
  min-height: 90px;
  transition: all var(--transition-fast);
  box-sizing: border-box;
}

.textarea-field:focus {
  outline: none;
  background-color: #ffffff;
  border-color: var(--border-focus);
  box-shadow: var(--shadow-glow);
}

.form-grid-2 {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 540px) {
  .form-grid-2 {
    grid-template-columns: 1fr 1fr;
  }
}

.field-error-msg {
  display: none;
  align-items: center;
  gap: 6px;
  font-size: 0.8rem;
  color: var(--accent-red);
  margin-top: 6px;
  font-weight: 500;
}

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

/* ==========================================================================
   Accordion / Customization Settings Drawer
   ========================================================================== */
.customization-drawer {
  margin: 18px 0;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  overflow: hidden;
  background-color: var(--bg-subtle);
  width: 100%;
  box-sizing: border-box;
}

.drawer-toggle {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 12px 14px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  background: transparent;
  transition: background var(--transition-fast);
  gap: 8px;
}

.drawer-toggle:hover {
  background: rgba(0, 0, 0, 0.02);
}

.drawer-toggle svg.chevron {
  transition: transform var(--transition-fast);
  flex-shrink: 0;
}

.drawer-toggle[aria-expanded="true"] svg.chevron {
  transform: rotate(180deg);
}

.drawer-content {
  display: none;
  padding: 16px;
  border-top: 1px solid var(--border-light);
  background: var(--bg-card);
  width: 100%;
  box-sizing: border-box;
}

.drawer-content.open {
  display: block;
  animation: fadeIn 200ms ease;
}

.settings-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 480px) {
  .settings-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.color-picker-row {
  display: flex;
  align-items: center;
  gap: 12px;
}

.color-input-badge {
  position: relative;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  overflow: hidden;
  cursor: pointer;
  flex-shrink: 0;
}

.color-input-badge input[type="color"] {
  position: absolute;
  top: -10px;
  left: -10px;
  width: 60px;
  height: 60px;
  border: none;
  cursor: pointer;
}

.select-field {
  width: 100%;
  max-width: 100%;
  height: 40px;
  padding: 8px 12px;
  font-size: 0.85rem;
  background-color: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  cursor: pointer;
  box-sizing: border-box;
}

.select-field:focus {
  outline: none;
  border-color: var(--border-focus);
}

/* Accessibility / Utility Classes */
.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ==========================================================================
   Action Buttons
   ========================================================================== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  height: 50px;
  background-color: var(--primary);
  color: var(--text-inverse);
  font-size: 0.975rem;
  font-weight: 700;
  letter-spacing: -0.01em;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 14px rgba(15, 23, 42, 0.15);
  transition: all var(--transition-fast);
  box-sizing: border-box;
  touch-action: manipulation;
}

.btn-primary:hover {
  background-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(15, 23, 42, 0.2);
}

.btn-primary:active {
  transform: translateY(0) scale(0.99);
  background-color: var(--primary-active);
}

.btn-secondary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 46px;
  padding: 0 16px;
  background-color: var(--bg-card);
  color: var(--text-main);
  font-size: 0.875rem;
  font-weight: 600;
  border: 1.5px solid var(--border-light);
  border-radius: var(--radius-md);
  transition: all var(--transition-fast);
  box-sizing: border-box;
  touch-action: manipulation;
  width: 100%;
}

.btn-secondary:hover {
  background-color: var(--bg-subtle);
  border-color: var(--text-muted);
}

.btn-secondary:active {
  transform: scale(0.98);
}

.btn-icon-only {
  width: 46px;
  height: 46px;
  padding: 0;
  border-radius: var(--radius-md);
  flex-shrink: 0;
}

/* ==========================================================================
   Preview Card & QR Display
   ========================================================================== */
.preview-card-sticky {
  position: relative;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 960px) {
  .preview-card-sticky {
    position: sticky;
    top: calc(var(--header-height) + 20px);
  }
}

.qr-display-box {
  background-color: var(--bg-subtle);
  border: 1.5px dashed var(--border-light);
  border-radius: var(--radius-lg);
  min-height: 290px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 20px 14px;
  text-align: center;
  position: relative;
  transition: all var(--transition-normal);
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  overflow: hidden;
}

.qr-display-box.has-qr {
  background-color: #ffffff;
  border-style: solid;
  border-color: var(--border-light);
  box-shadow: var(--shadow-sm);
}

/* Empty State */
.empty-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
  max-width: 250px;
  margin: 0 auto;
}

.empty-state-icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  background: var(--bg-elevated);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-dim);
  margin-bottom: 2px;
}

.empty-state-title {
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--text-main);
}

.empty-state-desc {
  font-size: 0.825rem;
  line-height: 1.5;
}

/* Loading State */
.loading-state {
  display: none;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
}

.loading-state.visible {
  display: flex;
}

.spinner {
  width: 38px;
  height: 38px;
  border: 3.5px solid var(--border-light);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.75s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* Generated QR Container */
.qr-rendered-wrapper {
  display: none;
  flex-direction: column;
  align-items: center;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.qr-rendered-wrapper.visible {
  display: flex;
  animation: scaleIn 250ms cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

.qr-canvas-holder {
  background: #ffffff;
  padding: 12px;
  border-radius: var(--radius-md);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 14px;
  max-width: 100%;
  box-sizing: border-box;
}

.qr-canvas-holder canvas {
  max-width: 100% !important;
  width: 100% !important;
  max-height: 240px;
  object-fit: contain;
  height: auto !important;
  display: block;
}

.qr-content-summary {
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 10px 12px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  margin-bottom: 16px;
  overflow: hidden;
}

.qr-summary-text {
  font-size: 0.8rem;
  color: var(--text-main);
  font-family: var(--font-mono);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  flex: 1;
  min-width: 0;
}

/* Download & Action Buttons */
.preview-actions-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 10px;
  width: 100%;
  margin-top: 14px;
  box-sizing: border-box;
}

@media (min-width: 500px) {
  .preview-actions-grid {
    grid-template-columns: 1fr 1fr;
  }
  .btn-download-primary,
  #btn-copy-image {
    grid-column: span 2;
  }
}

.btn-download-primary {
  background-color: var(--primary);
  color: #ffffff;
  border: none;
}

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

.reset-row {
  margin-top: 14px;
  text-align: center;
  width: 100%;
}

.btn-text-link {
  font-size: 0.825rem;
  color: var(--text-muted);
  font-weight: 600;
  text-decoration: underline;
  transition: color var(--transition-fast);
}

.btn-text-link:hover {
  color: var(--accent-red);
}

/* ==========================================================================
   History Section (LocalStorage)
   ========================================================================== */
.history-section {
  margin-top: 40px;
  padding-top: 32px;
  border-top: 1px solid var(--border-light);
  width: 100%;
  box-sizing: border-box;
}

.history-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 16px;
  gap: 8px;
}

.history-title {
  font-size: 1.05rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 8px;
}

.history-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 12px;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 640px) {
  .history-list {
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  }
}

.history-item {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 12px 14px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  transition: all var(--transition-fast);
  box-sizing: border-box;
  min-width: 0;
}

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

.history-item-info {
  flex: 1;
  min-width: 0;
}

.history-item-title {
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  color: var(--text-main);
  display: block;
}

.history-item-date {
  font-size: 0.72rem;
  color: var(--text-muted);
}

.history-item-actions {
  display: flex;
  gap: 4px;
  flex-shrink: 0;
}

.history-btn-mini {
  padding: 6px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: color var(--transition-fast);
}

.history-btn-mini:hover {
  color: var(--text-main);
  background: var(--bg-elevated);
}

/* ==========================================================================
   Scanner Page Styles (`scan.html`)
   ========================================================================== */
.scanner-viewfinder-container {
  position: relative;
  width: 100%;
  max-width: 100%;
  margin: 0 auto;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background-color: #000000;
  box-shadow: var(--shadow-md);
  min-height: 280px;
  display: flex;
  align-items: center;
  justify-content: center;
  box-sizing: border-box;
}

#reader {
  width: 100% !important;
  max-width: 100% !important;
  border: none !important;
  background-color: #000000;
  overflow: hidden !important;
  box-sizing: border-box !important;
}

#reader video {
  width: 100% !important;
  max-width: 100% !important;
  height: 100% !important;
  object-fit: cover !important;
  border-radius: var(--radius-lg);
}

#reader * {
  max-width: 100% !important;
  box-sizing: border-box !important;
}

/* Custom Scanning Laser Reticle Overlay */
.scanner-reticle-overlay {
  position: absolute;
  inset: 0;
  pointer-events: none;
  display: none;
  align-items: center;
  justify-content: center;
}

.scanner-reticle-overlay.active {
  display: flex;
}

.reticle-box {
  width: clamp(160px, 56vw, 220px);
  height: clamp(160px, 56vw, 220px);
  position: relative;
  border: 2px solid rgba(255, 255, 255, 0.4);
  border-radius: 18px;
  overflow: hidden;
  box-sizing: border-box;
}

/* Corner Reticle Brackets */
.reticle-box::before,
.reticle-box::after {
  content: "";
  position: absolute;
  width: 20px;
  height: 20px;
  border-color: #ffffff;
  border-style: solid;
}

.reticle-box::before {
  top: 0;
  left: 0;
  border-width: 3.5px 0 0 3.5px;
  border-top-left-radius: 10px;
}

.reticle-box::after {
  bottom: 0;
  right: 0;
  border-width: 0 3.5px 3.5px 0;
  border-bottom-right-radius: 10px;
}

.scanner-laser-line {
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: linear-gradient(90deg, transparent, #10b981 50%, transparent);
  box-shadow: 0 0 14px #10b981;
  animation: scanLaser 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}

@keyframes scanLaser {
  0% { top: 4%; opacity: 0.2; }
  50% { top: 94%; opacity: 1; }
  100% { top: 4%; opacity: 0.2; }
}

.camera-controls-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  margin-top: 14px;
  width: 100%;
  box-sizing: border-box;
}

/* Dropzone for Upload Scanner */
.upload-dropzone {
  border: 2px dashed var(--border-light);
  background-color: var(--bg-subtle);
  border-radius: var(--radius-xl);
  padding: 32px 16px;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition-fast);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
}

.upload-dropzone:hover,
.upload-dropzone.drag-active {
  border-color: var(--primary);
  background-color: rgba(15, 23, 42, 0.02);
}

.dropzone-icon {
  width: 48px;
  height: 48px;
  background: var(--bg-elevated);
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-main);
  margin-bottom: 2px;
}

.dropzone-title {
  font-size: 0.975rem;
  font-weight: 700;
  color: var(--text-main);
}

.dropzone-hint {
  font-size: 0.8rem;
  color: var(--text-muted);
}

.image-preview-holder {
  display: none;
  position: relative;
  max-width: 240px;
  margin: 0 auto;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  box-sizing: border-box;
}

.image-preview-holder.visible {
  display: block;
}

.image-preview-holder img {
  width: 100%;
  height: auto;
  display: block;
}

/* Decoded Result Card */
.decoded-result-card {
  display: none;
  background: var(--bg-card);
  border: 2px solid var(--border-light);
  border-radius: var(--radius-xl);
  padding: 20px;
  box-shadow: var(--shadow-md);
  animation: slideUp 250ms cubic-bezier(0.16, 1, 0.3, 1);
  width: 100%;
  box-sizing: border-box;
}

.decoded-result-card.visible {
  display: block;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.decoded-status-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--accent-green-bg);
  color: #065f46;
  font-size: 0.8rem;
  font-weight: 700;
  padding: 5px 12px;
  border-radius: var(--radius-full);
  margin-bottom: 12px;
}

.decoded-box {
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px;
  word-break: break-all;
  overflow-wrap: anywhere;
  white-space: pre-wrap;
  font-family: var(--font-mono);
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-main);
  max-height: 220px;
  overflow-y: auto;
  margin-bottom: 18px;
  width: 100%;
  max-width: 100%;
  box-sizing: border-box;
}

.result-actions-grid {
  display: flex;
  flex-direction: column;
  gap: 10px;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 480px) {
  .result-actions-grid {
    flex-direction: row;
  }
  .result-actions-grid .btn-primary,
  .result-actions-grid .btn-secondary {
    flex: 1;
  }
}

/* ==========================================================================
   Toast Notification System
   ========================================================================== */
.toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 1000;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
  box-sizing: border-box;
  max-width: calc(100vw - 32px);
}

@media (max-width: 600px) {
  .toast-container {
    bottom: 12px;
    left: 12px;
    right: 12px;
    width: calc(100vw - 24px);
    max-width: calc(100vw - 24px);
    align-items: center;
  }
}

.toast {
  pointer-events: auto;
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 260px;
  max-width: 420px;
  background-color: #0f172a;
  color: #ffffff;
  padding: 12px 16px;
  border-radius: var(--radius-md);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.25);
  font-size: 0.875rem;
  font-weight: 500;
  animation: toastIn 200ms cubic-bezier(0.16, 1, 0.3, 1);
  transition: opacity 150ms ease, transform 150ms ease;
  box-sizing: border-box;
}

@media (max-width: 600px) {
  .toast {
    min-width: 0;
    width: 100%;
    max-width: 100%;
  }
}

.toast.toast-error {
  background-color: #dc2626;
}

.toast.toast-success {
  background-color: #0f172a;
  border-left: 4px solid var(--accent-green);
}

.toast.hide {
  opacity: 0;
  transform: translateY(8px);
}

@keyframes toastIn {
  from { opacity: 0; transform: translateY(14px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-light);
  padding: 36px 16px;
  padding-bottom: max(env(safe-area-inset-bottom, 0px), 36px);
  padding-left: max(env(safe-area-inset-left, 0px), 16px);
  padding-right: max(env(safe-area-inset-right, 0px), 16px);
  margin-top: auto;
  width: 100%;
  box-sizing: border-box;
}

.footer-container {
  max-width: var(--container-max-w);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  text-align: center;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 768px) {
  .footer-container {
    flex-direction: row;
    justify-content: space-between;
    text-align: left;
  }
}

.footer-brand {
  display: flex;
  align-items: center;
  gap: 8px;
  font-weight: 700;
  color: var(--text-main);
}

.footer-copyright {
  font-size: 0.825rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  flex-wrap: wrap;
  justify-content: center;
}

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

/* ==========================================================================
   Legal & Privacy Policy Page Styles
   ========================================================================== */
.legal-container {
  max-width: 860px;
  margin: 0 auto;
  padding: 24px 16px 64px;
  width: 100%;
  box-sizing: border-box;
}

.legal-header {
  margin-bottom: 28px;
  text-align: left;
}

.legal-meta-row {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px 12px;
  margin-top: 12px;
  font-size: 0.825rem;
  color: var(--text-muted);
}

.legal-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-sm);
  padding: 28px 24px;
  margin-bottom: 24px;
  width: 100%;
  box-sizing: border-box;
}

.legal-section {
  margin-bottom: 28px;
  width: 100%;
  box-sizing: border-box;
}

.legal-section:last-child {
  margin-bottom: 0;
}

.legal-h2 {
  font-size: 1.25rem;
  font-weight: 800;
  letter-spacing: -0.02em;
  color: var(--text-main);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.legal-h3 {
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-main);
  margin: 16px 0 8px;
}

.legal-p {
  font-size: 0.925rem;
  line-height: 1.65;
  color: #334155;
  margin-bottom: 12px;
  word-break: break-word;
}

.legal-ul {
  margin: 8px 0 14px 20px;
  color: #334155;
  font-size: 0.925rem;
  line-height: 1.65;
}

.legal-ul li {
  margin-bottom: 6px;
}

.permission-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 14px;
  margin: 18px 0;
  width: 100%;
  box-sizing: border-box;
}

@media (min-width: 640px) {
  .permission-grid {
    grid-template-columns: 1fr 1fr;
  }
}

.permission-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px;
  box-sizing: border-box;
}

.permission-card-header {
  display: flex;
  align-items: center;
  gap: 8px;
  margin-bottom: 6px;
  font-weight: 700;
  font-size: 0.9rem;
  color: var(--text-main);
}

.permission-badge {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  padding: 2px 6px;
  border-radius: var(--radius-sm);
  background: var(--bg-elevated);
  border: 1px solid var(--border-light);
  color: var(--text-muted);
}

.callout-box {
  background: #f8fafc;
  border-left: 4px solid var(--primary);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 16px;
  margin: 18px 0;
  font-size: 0.9rem;
  line-height: 1.6;
  color: var(--text-main);
  box-sizing: border-box;
  word-break: break-word;
}

.callout-box.green {
  background: #f0fdf4;
  border-left-color: var(--accent-green);
  color: #14532d;
}

.toc-card {
  background: var(--bg-subtle);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  padding: 14px 16px;
  margin-bottom: 24px;
  box-sizing: border-box;
}

.toc-list {
  display: grid;
  grid-template-columns: 1fr;
  gap: 8px;
  list-style: none;
  padding: 0;
  margin: 8px 0 0;
}

@media (min-width: 600px) {
  .toc-list {
    grid-template-columns: 1fr 1fr;
  }
}

.toc-link {
  font-size: 0.85rem;
  color: var(--text-muted);
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 6px;
  transition: color var(--transition-fast);
}

.toc-link:hover {
  color: var(--text-main);
  text-decoration: underline;
}

/* ==========================================================================
   Comprehensive Mobile Breakpoints (<600px & <400px)
   ========================================================================== */
@media (max-width: 600px) {
  .main-wrapper {
    padding: 16px 12px 48px;
  }
  .card-panel {
    padding: 16px 12px;
    border-radius: var(--radius-lg);
  }
  .qr-display-box {
    padding: 14px 10px;
    min-height: 250px;
  }
  .hero-banner {
    margin-bottom: 20px;
  }
  .hero-pill {
    font-size: 0.75rem;
    padding: 4px 10px;
    margin-bottom: 10px;
  }
  .hero-title {
    font-size: clamp(1.55rem, 6.8vw, 2.1rem);
    margin-bottom: 8px;
  }
  .hero-subtitle {
    font-size: 0.875rem;
    line-height: 1.5;
  }
  .input-field {
    height: 46px;
    font-size: 0.875rem;
    padding: 10px 12px;
  }
  .input-field.has-icon-left {
    padding-left: 38px;
  }
  .input-field.has-action-right {
    padding-right: 74px;
  }
  .input-icon-left {
    left: 12px;
    width: 16px;
    height: 16px;
  }
  .btn-primary {
    height: 46px;
    font-size: 0.925rem;
  }
  .btn-secondary {
    height: 44px;
    font-size: 0.85rem;
    padding: 0 12px;
  }
  .legal-container {
    padding: 16px 12px 48px;
  }
  .legal-card {
    padding: 18px 14px;
    border-radius: var(--radius-lg);
  }
  .legal-h2 {
    font-size: 1.15rem;
  }
}

@media (max-width: 360px) {
  .main-wrapper {
    padding: 12px 8px 36px;
  }
  .card-panel {
    padding: 14px 10px;
  }
  .hero-title {
    font-size: 1.45rem;
  }
  .nav-item span {
    font-size: 0.75rem;
  }
}

/* ==========================================================================
   Accessibility & Focus Outlines
   ========================================================================== */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

@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;
  }
}