/* JW Fusion - Material 3 Inspired Design System */
:root {
  /* Brand Colors */
  --md-sys-color-primary: #4A6DA7;
  --md-sys-color-on-primary: #FFFFFF;
  --md-sys-color-primary-container: #D8E2FF;
  --md-sys-color-on-primary-container: #001A41;
  
  --md-sys-color-secondary: #565E71;
  --md-sys-color-on-secondary: #FFFFFF;
  --md-sys-color-secondary-container: #DAE2F9;
  --md-sys-color-on-secondary-container: #131C2B;

  --md-sys-color-tertiary: #6B3AC3;
  --md-sys-color-on-tertiary: #FFFFFF;
  --md-sys-color-tertiary-container: #EBDDFF;
  --md-sys-color-on-tertiary-container: #22005D;

  --md-sys-color-background: #F8F9FE;
  --md-sys-color-on-background: #191C20;
  --md-sys-color-surface: #FFFFFF;
  --md-sys-color-on-surface: #191C20;
  --md-sys-color-surface-variant: #E1E2EC;
  --md-sys-color-on-surface-variant: #44474F;
  --md-sys-color-outline: #757780;
  --md-sys-color-outline-variant: #C5C6D0;

  --brand-gradient: linear-gradient(135deg, #1E3F80 0%, #6B3AC3 100%);
  --brand-surface-tint: rgba(74, 109, 167, 0.08);

  /* Typography */
  --font-family-base: 'Inter', 'Roboto', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  
  /* Elevation & Shadows */
  --shadow-1: 0px 1px 3px 1px rgba(0, 0, 0, 0.08), 0px 1px 2px 0px rgba(0, 0, 0, 0.05);
  --shadow-2: 0px 2px 6px 2px rgba(0, 0, 0, 0.08), 0px 1px 2px 0px rgba(0, 0, 0, 0.06);
  --shadow-3: 0px 4px 12px 3px rgba(0, 0, 0, 0.08), 0px 1px 3px 0px rgba(0, 0, 0, 0.06);

  /* Radius */
  --radius-xs: 4px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;
}

/* Reset & Base Styling */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

body {
  font-family: var(--font-family-base);
  background-color: var(--md-sys-color-background);
  color: var(--md-sys-color-on-background);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Navigation Bar */
.navbar {
  background-color: var(--md-sys-color-surface);
  border-bottom: 1px solid var(--md-sys-color-surface-variant);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-1);
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.875rem 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.875rem;
  text-decoration: none;
  color: var(--md-sys-color-on-surface);
  font-weight: 700;
  font-size: 1.25rem;
}

.brand-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-md);
  object-fit: cover;
  box-shadow: 0 2px 8px rgba(30, 63, 128, 0.25);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 1rem;
  border-radius: var(--radius-full);
  transition: all 0.2s ease;
}

.nav-links a:hover,
.nav-links a.active {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
}

.nav-links a.btn-cta-nav {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  font-weight: 600;
}

.nav-links a.btn-cta-nav:hover {
  background-color: #3B5A8F;
  box-shadow: var(--shadow-1);
}

/* Buttons (Material 3 Specs) */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  border-radius: var(--radius-full);
  font-size: 0.95rem;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: var(--md-sys-color-primary);
  color: var(--md-sys-color-on-primary);
  box-shadow: var(--shadow-1);
}

.btn-primary:hover {
  background-color: #3b588c;
  box-shadow: var(--shadow-2);
}

.btn-tonal {
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
}

.btn-tonal:hover {
  background-color: #c9d5f5;
}

.btn-outlined {
  background-color: transparent;
  color: var(--md-sys-color-primary);
  border: 1px solid var(--md-sys-color-outline);
}

.btn-outlined:hover {
  background-color: var(--brand-surface-tint);
  border-color: var(--md-sys-color-primary);
}

.btn-large {
  padding: 1rem 2rem;
  font-size: 1.1rem;
}

/* Hero Section */
.hero {
  background: linear-gradient(180deg, #FFFFFF 0%, #F0F4FA 100%);
  padding: 4rem 1.5rem 5rem;
  text-align: center;
  border-bottom: 1px solid var(--md-sys-color-surface-variant);
}

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

.badge-trust {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  background-color: #E8F0FE;
  color: #1967D2;
  padding: 0.35rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: 1.5rem;
  border: 1px solid #C2E7FF;
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: var(--md-sys-color-on-surface);
  line-height: 1.15;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-subtitle {
  font-size: 1.25rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 2.25rem;
  max-width: 720px;
  margin-left: auto;
  margin-right: auto;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  flex-wrap: wrap;
}

.hero-icon-preview {
  margin-top: 3rem;
  display: flex;
  justify-content: center;
}

.hero-icon-img {
  width: 120px;
  height: 120px;
  border-radius: 28px;
  box-shadow: 0 12px 32px rgba(30, 63, 128, 0.22);
}

/* Section Containers */
.section {
  padding: 4rem 1.5rem;
  max-width: 1200px;
  margin: 0 auto;
  width: 100%;
}

.section-header {
  text-align: center;
  max-width: 720px;
  margin: 0 auto 3rem;
}

.section-title {
  font-size: 2.1rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.75rem;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Feature Cards Grid */
.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 1.75rem;
}

.card {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-xl);
  padding: 2rem;
  border: 1px solid var(--md-sys-color-surface-variant);
  box-shadow: var(--shadow-1);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-2);
}

.card-icon {
  width: 52px;
  height: 52px;
  border-radius: var(--radius-lg);
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 1.25rem;
}

.card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.75rem;
}

.card p {
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.975rem;
}

/* Category Badge List */
.category-badges {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  margin-top: 1rem;
}

.category-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background-color: var(--md-sys-color-secondary-container);
  color: var(--md-sys-color-on-secondary-container);
  padding: 0.4rem 0.85rem;
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
}

/* Platform Availability Banner */
.platform-banner {
  background: var(--brand-gradient);
  color: #FFFFFF;
  border-radius: var(--radius-xl);
  padding: 3rem 2rem;
  margin: 2rem 0;
  box-shadow: var(--shadow-2);
}

.platform-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 2rem;
  align-items: center;
}

.platform-item h3 {
  font-size: 1.35rem;
  margin-bottom: 0.5rem;
}

.platform-item p {
  opacity: 0.9;
  font-size: 0.95rem;
}

.platform-tag {
  display: inline-block;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.25rem 0.75rem;
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  margin-bottom: 0.75rem;
}

/* Step-by-Step Flow */
.steps-container {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-top: 2rem;
}

.step-card {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  border: 1px solid var(--md-sys-color-surface-variant);
  position: relative;
}

.step-number {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background-color: var(--md-sys-color-primary);
  color: white;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 1rem;
}

.step-card h4 {
  font-size: 1.1rem;
  margin-bottom: 0.5rem;
}

.step-card p {
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
}

/* Merge Tool UI Components */
.tool-box {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-xl);
  border: 1px solid var(--md-sys-color-surface-variant);
  padding: 2.5rem;
  box-shadow: var(--shadow-2);
  max-width: 900px;
  margin: 0 auto;
}

.drop-zone {
  border: 2px dashed var(--md-sys-color-primary);
  background-color: var(--brand-surface-tint);
  border-radius: var(--radius-lg);
  padding: 3.5rem 2rem;
  text-align: center;
  cursor: pointer;
  transition: all 0.2s ease;
}

.drop-zone:hover, .drop-zone.dragover {
  background-color: #DDE7F7;
  border-color: #2D4C82;
}

.drop-icon {
  font-size: 3.5rem;
  color: var(--md-sys-color-primary);
  margin-bottom: 1rem;
}

.drop-title {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  margin-bottom: 0.5rem;
}

.drop-subtitle {
  font-size: 0.95rem;
  color: var(--md-sys-color-on-surface-variant);
  margin-bottom: 1.5rem;
}

.file-list {
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.file-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  background-color: var(--md-sys-color-background);
  padding: 1rem 1.25rem;
  border-radius: var(--radius-md);
  border: 1px solid var(--md-sys-color-surface-variant);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 0.875rem;
}

.file-name {
  font-weight: 600;
  font-size: 0.95rem;
}

.file-size {
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
}

.btn-remove-file {
  background: transparent;
  border: none;
  color: var(--md-sys-color-outline);
  cursor: pointer;
  padding: 0.35rem;
  border-radius: 50%;
  font-size: 1.1rem;
}

.btn-remove-file:hover {
  color: #B3261E;
  background-color: #FCE8E6;
}

.progress-container {
  margin-top: 2rem;
  display: none;
}

.progress-bar-bg {
  width: 100%;
  height: 10px;
  background-color: var(--md-sys-color-surface-variant);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin-bottom: 0.75rem;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background-color: var(--md-sys-color-primary);
  transition: width 0.3s ease;
}

.progress-status {
  font-size: 0.9rem;
  color: var(--md-sys-color-on-surface-variant);
  text-align: center;
  font-weight: 500;
}

.merge-summary-card {
  margin-top: 2rem;
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  border-radius: var(--radius-lg);
  padding: 1.75rem;
  display: none;
}

.summary-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 1rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.summary-stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
  gap: 1rem;
  margin-bottom: 1.5rem;
}

.stat-box {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-md);
  padding: 1rem;
  text-align: center;
  box-shadow: var(--shadow-1);
}

.stat-num {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--md-sys-color-primary);
}

.stat-label {
  font-size: 0.8rem;
  color: var(--md-sys-color-on-surface-variant);
  font-weight: 600;
  text-transform: uppercase;
}

/* FAQ Accordion Styling */
.faq-list {
  max-width: 860px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.faq-item {
  background-color: var(--md-sys-color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid var(--md-sys-color-surface-variant);
  overflow: hidden;
  box-shadow: var(--shadow-1);
}

.faq-question {
  width: 100%;
  padding: 1.35rem 1.75rem;
  text-align: left;
  background: transparent;
  border: none;
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--md-sys-color-on-surface);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.faq-question:hover {
  background-color: var(--brand-surface-tint);
}

.faq-answer {
  padding: 0 1.75rem 1.5rem 1.75rem;
  color: var(--md-sys-color-on-surface-variant);
  font-size: 0.975rem;
  line-height: 1.65;
  display: none;
}

.faq-item.active .faq-answer {
  display: block;
}

.faq-item.active .faq-toggle-icon {
  transform: rotate(180deg);
}

.faq-toggle-icon {
  transition: transform 0.2s ease;
  font-size: 1.25rem;
}

/* Footer & Disclaimer */
.footer {
  background-color: var(--md-sys-color-surface);
  border-top: 1px solid var(--md-sys-color-surface-variant);
  padding: 3rem 1.5rem 2rem;
  margin-top: auto;
}

.footer-container {
  max-width: 1200px;
  margin: 0 auto;
}

.footer-disclaimer-box {
  background-color: var(--md-sys-color-background);
  border: 1px solid var(--md-sys-color-outline-variant);
  border-radius: var(--radius-md);
  padding: 1.25rem;
  font-size: 0.85rem;
  color: var(--md-sys-color-on-surface-variant);
  line-height: 1.55;
  margin-bottom: 2rem;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.875rem;
  color: var(--md-sys-color-outline);
}

/* PWA Install Banner */
.pwa-banner {
  background-color: var(--md-sys-color-primary-container);
  color: var(--md-sys-color-on-primary-container);
  padding: 0.875rem 1.5rem;
  display: none;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  border-bottom: 1px solid var(--md-sys-color-outline-variant);
}

.pwa-banner-text {
  font-size: 0.9rem;
  font-weight: 500;
}

/* Utilities */
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* Mobile Responsive */
@media (max-width: 768px) {
  .hero h1 { font-size: 2.2rem; }
  .hero-subtitle { font-size: 1.05rem; }
  .nav-container { flex-direction: column; gap: 1rem; }
  .tool-box { padding: 1.5rem; }
  .drop-zone { padding: 2rem 1rem; }
  .platform-banner { padding: 2rem 1.25rem; }
}