/* ==========================================================================
   PhuocNH Software - Modern CSS Styling
   ========================================================================== */

:root {
  --primary: #3b82f6;
  --primary-dark: #1d4ed8;
  --primary-light: #eff6ff;
  --accent: #6366f1;
  --accent-gradient: linear-gradient(135deg, #3b82f6 0%, #6366f1 50%, #8b5cf6 100%);
  --success: #10b981;
  --warning: #f59e0b;
  --danger: #ef4444;
  --text-main: #0f172a;
  --text-muted: #475569;
  --text-light: #94a3b8;
  --bg-page: #f8fafc;
  --bg-surface: #ffffff;
  --bg-card: #ffffff;
  --border: #e2e8f0;
  --border-focus: #93c5fd;
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
  --shadow-lg: 0 10px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 18px;
  --radius-full: 9999px;
  --transition: all 0.25s ease-in-out;
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  --max-width: 1200px;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font-family);
  background-color: var(--bg-page);
  color: var(--text-main);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a:hover {
  color: var(--primary-dark);
}

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

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* ==========================================================================
   Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: var(--transition);
}

.nav-wrapper {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  text-decoration: none;
}

.brand-logo {
  height: 40px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.5rem;
  list-style: none;
}

.nav-item a {
  color: var(--text-muted);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: var(--transition);
}

.nav-item a:hover,
.nav-item.active a {
  color: var(--primary);
  background: var(--primary-light);
}

.nav-btn {
  background: var(--accent-gradient);
  color: #fff !important;
  padding: 0.55rem 1.25rem !important;
  border-radius: var(--radius-full) !important;
  font-weight: 600 !important;
  box-shadow: 0 4px 12px rgba(99, 102, 241, 0.25);
}

.nav-btn:hover {
  opacity: 0.95;
  transform: translateY(-1px);
}

/* Mobile Menu Button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

.mobile-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-main);
  margin: 5px 0;
  transition: var(--transition);
  border-radius: 2px;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */

.hero {
  padding: 5rem 0 4rem;
  background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, rgba(248, 250, 252, 0) 70%);
  text-align: center;
}

.hero-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.35rem 1rem;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-full);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--primary);
  box-shadow: var(--shadow-sm);
  margin-bottom: 1.5rem;
}

.hero-pill .dot {
  width: 8px;
  height: 8px;
  background: var(--success);
  border-radius: 50%;
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); }
  70% { transform: scale(1); box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

.hero-title {
  font-size: 3rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero-gradient {
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 680px;
  margin: 0 auto 2.5rem;
  line-height: 1.6;
}

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

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-weight: 600;
  padding: 0.75rem 1.75rem;
  border-radius: var(--radius-md);
  transition: var(--transition);
  cursor: pointer;
  border: 1px solid transparent;
  font-size: 1rem;
}

.btn-primary {
  background: var(--accent-gradient);
  color: #fff;
  box-shadow: var(--shadow-md);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
  color: #fff;
}

.btn-secondary {
  background: #fff;
  color: var(--text-main);
  border-color: var(--border);
  box-shadow: var(--shadow-sm);
}

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

/* ==========================================================================
   Compliance & Store Registration Notice Bar
   ========================================================================== */

.compliance-badge-bar {
  background: #ffffff;
  border: 1px solid #e0e7ff;
  border-radius: var(--radius-lg);
  padding: 1.5rem 2rem;
  margin-top: 3rem;
  box-shadow: var(--shadow-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1.5rem;
}

.compliance-info {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.compliance-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  background: #eef2ff;
  color: var(--accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.compliance-text h4 {
  font-size: 1.1rem;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.compliance-text p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.compliance-links {
  display: flex;
  gap: 0.75rem;
  flex-wrap: wrap;
}

.store-pill {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.4rem 0.9rem;
  background: #f1f5f9;
  border-radius: var(--radius-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--text-muted);
}

.store-pill.active {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

/* ==========================================================================
   Featured Apps Section
   ========================================================================== */

.section {
  padding: 5rem 0;
}

.section-alt {
  background: #ffffff;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-header {
  text-align: center;
  margin-bottom: 3.5rem;
}

.section-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--text-muted);
  max-width: 600px;
  margin: 0 auto;
}

.apps-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 2rem;
}

.app-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
  display: flex;
  flex-direction: column;
  position: relative;
}

.app-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
  border-color: #cbd5e1;
}

.app-badge {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: #f1f5f9;
  color: var(--text-muted);
  font-size: 0.75rem;
  font-weight: 700;
  padding: 0.25rem 0.65rem;
  border-radius: var(--radius-full);
  text-transform: uppercase;
}

.app-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  margin-bottom: 1.25rem;
}

.app-icon {
  width: 68px;
  height: 68px;
  border-radius: 16px;
  box-shadow: var(--shadow-sm);
}

.app-meta h3 {
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--text-main);
  margin-bottom: 0.25rem;
}

.app-category {
  font-size: 0.85rem;
  color: var(--text-light);
}

.app-rating {
  display: flex;
  align-items: center;
  gap: 0.35rem;
  margin-top: 0.35rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: #d97706;
}

.app-description {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 1.75rem;
  flex-grow: 1;
}

.app-badges {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  flex-wrap: wrap;
  padding-top: 1.25rem;
  border-top: 1px solid #f1f5f9;
}

.store-badge-img {
  height: 40px;
  width: auto;
  transition: var(--transition);
}

.store-badge-img:hover {
  opacity: 0.85;
  transform: scale(1.02);
}

/* ==========================================================================
   Compliance Hub Cards
   ========================================================================== */

.compliance-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 1.5rem;
}

.compliance-card {
  background: var(--bg-page);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.75rem;
  transition: var(--transition);
  display: flex;
  flex-direction: column;
}

.compliance-card:hover {
  background: #ffffff;
  border-color: var(--primary);
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.compliance-card-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: var(--primary-light);
  color: var(--primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.3rem;
  margin-bottom: 1.25rem;
}

.compliance-card h3 {
  font-size: 1.15rem;
  margin-bottom: 0.5rem;
}

.compliance-card p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.5;
  margin-bottom: 1.25rem;
  flex-grow: 1;
}

.compliance-card .arrow-link {
  font-weight: 600;
  font-size: 0.9rem;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
}

.compliance-card .arrow-link:hover {
  gap: 0.55rem;
}

/* ==========================================================================
   Policy & Legal Content Layout
   ========================================================================== */

.page-banner {
  background: radial-gradient(circle at 50% 0%, rgba(99, 102, 241, 0.08) 0%, rgba(248, 250, 252, 0) 100%);
  padding: 3.5rem 0 2.5rem;
  text-align: center;
  border-bottom: 1px solid var(--border);
}

.page-title {
  font-size: 2.5rem;
  font-weight: 800;
  margin-bottom: 0.75rem;
}

.page-meta {
  font-size: 0.9rem;
  color: var(--text-light);
}

.page-content-wrapper {
  padding: 3.5rem 0 5rem;
}

.legal-layout {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: 3rem;
  align-items: start;
}

/* Sticky Sidebar Table of Contents */
.legal-sidebar {
  position: sticky;
  top: 96px;
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 1.5rem;
  box-shadow: var(--shadow-sm);
}

.sidebar-title {
  font-size: 0.9rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-light);
  margin-bottom: 1rem;
  font-weight: 700;
}

.toc-list {
  list-style: none;
}

.toc-item {
  margin-bottom: 0.5rem;
}

.toc-item a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.35rem 0.5rem;
  border-radius: 6px;
  line-height: 1.4;
}

.toc-item a:hover {
  color: var(--primary);
  background: var(--primary-light);
}

/* Main Legal Text Document */
.legal-article {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
}

.legal-article h2 {
  font-size: 1.5rem;
  font-weight: 700;
  margin: 2rem 0 1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px solid #f1f5f9;
  color: var(--text-main);
  scroll-margin-top: 100px;
}

.legal-article h3 {
  font-size: 1.2rem;
  font-weight: 600;
  margin: 1.25rem 0 0.5rem;
  color: #1e293b;
}

.legal-article p {
  color: var(--text-muted);
  font-size: 1rem;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.legal-article ul, .legal-article ol {
  margin: 0.75rem 0 1.25rem 1.5rem;
  color: var(--text-muted);
}

.legal-article li {
  margin-bottom: 0.5rem;
  line-height: 1.6;
}

/* Highlight boxes for Store reviewers */
.notice-box {
  background: #eff6ff;
  border-left: 4px solid var(--primary);
  padding: 1.25rem 1.5rem;
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: 1.5rem 0;
}

.notice-box.warning {
  background: #fffbeb;
  border-left-color: var(--warning);
}

.notice-box.success {
  background: #ecfdf5;
  border-left-color: var(--success);
}

.notice-title {
  font-weight: 700;
  font-size: 1rem;
  margin-bottom: 0.25rem;
  color: var(--text-main);
}

.notice-text {
  font-size: 0.92rem;
  color: var(--text-muted);
  margin-bottom: 0 !important;
}

/* ==========================================================================
   Forms (Support & Deletion)
   ========================================================================== */

.form-card {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 2.5rem;
  box-shadow: var(--shadow-sm);
  max-width: 680px;
  margin: 0 auto;
}

.form-group {
  margin-bottom: 1.25rem;
}

.form-label {
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 0.5rem;
  color: var(--text-main);
}

.form-control {
  width: 100%;
  padding: 0.75rem 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition);
  background: #ffffff;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

textarea.form-control {
  min-height: 120px;
  resize: vertical;
}

.form-help {
  font-size: 0.82rem;
  color: var(--text-light);
  margin-top: 0.35rem;
}

.form-alert {
  padding: 1rem 1.25rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.5rem;
  font-size: 0.95rem;
}

.form-alert.success {
  background: #ecfdf5;
  color: #065f46;
  border: 1px solid #a7f3d0;
}

.form-alert.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

/* ==========================================================================
   FAQ Section
   ========================================================================== */

.faq-list {
  max-width: 800px;
  margin: 0 auto;
}

.faq-item {
  background: #ffffff;
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  margin-bottom: 1rem;
  overflow: hidden;
  transition: var(--transition);
}

.faq-question {
  width: 100%;
  padding: 1.25rem 1.5rem;
  text-align: left;
  background: none;
  border: none;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

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

.faq-icon {
  font-size: 1.2rem;
  transition: transform 0.25s ease;
}

.faq-answer {
  padding: 0 1.5rem 1.25rem;
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  display: none;
}

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

.faq-item.open .faq-icon {
  transform: rotate(45deg);
}

/* ==========================================================================
   Footer
   ========================================================================== */

.site-footer {
  margin-top: auto;
  background: #0f172a;
  color: #cbd5e1;
  padding: 4.5rem 0 2rem;
  border-top: 1px solid #1e293b;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  margin-bottom: 3.5rem;
}

.footer-brand p {
  color: #94a3b8;
  font-size: 0.95rem;
  margin: 1rem 0 1.5rem;
  line-height: 1.6;
  max-width: 320px;
}

.footer-title {
  color: #ffffff;
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  letter-spacing: 0.02em;
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: 0.75rem;
}

.footer-links a {
  color: #94a3b8;
  font-size: 0.9rem;
  transition: var(--transition);
}

.footer-links a:hover {
  color: #ffffff;
  padding-left: 4px;
}

.badge-tag {
  display: inline-block;
  font-size: 0.7rem;
  background: rgba(59, 130, 246, 0.2);
  color: #60a5fa;
  padding: 0.15rem 0.4rem;
  border-radius: 4px;
  margin-left: 0.4rem;
  vertical-align: middle;
}

.footer-bottom {
  padding-top: 2rem;
  border-top: 1px solid #1e293b;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 1rem;
  font-size: 0.85rem;
  color: #64748b;
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */

@media (max-width: 992px) {
  .legal-layout {
    grid-template-columns: 1fr;
  }
  .legal-sidebar {
    position: static;
    margin-bottom: 2rem;
  }
  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 768px) {
  .hero-title {
    font-size: 2.2rem;
  }
  .section-title {
    font-size: 1.8rem;
  }
  .mobile-toggle {
    display: block;
  }
  .nav-links {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    padding: 1.5rem;
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    display: none;
    gap: 1rem;
    align-items: stretch;
  }
  .nav-links.active {
    display: flex;
  }
  .nav-item a {
    padding: 0.75rem 1rem;
  }
  .footer-grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }
  .compliance-badge-bar {
    flex-direction: column;
    align-items: flex-start;
  }
}