/* ==========================================================================
   Root Variables & Base Styles
   ========================================================================== */
:root {
  --primary: #ff6a00;
  --primary-hover: #e05d00;
  --primary-light: #fff0e6;
  --bg-main: #f8f9fa;
  --card-bg: #ffffff;
  --text-main: #212529;
  --text-muted: #6c757d;
  --border-color: #e9ecef;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.04);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
  --radius: 12px;
  --transition-fast: 0.25s ease;
  --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

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

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

body {
  font-family: 'SolaimanLipi', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
  background-color: var(--bg-main);
  color: var(--text-main);
  line-height: 1.7;
  overflow-x: hidden;
}

/* ==========================================================================
   Loading Screen
   ========================================================================== */
#loading-screen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: #ffffff;
  display: flex;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 1;
  visibility: visible;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}

#loading-screen.fade-out {
  opacity: 0;
  visibility: hidden;
}

/* ==========================================================================
   Header Section
   ========================================================================== */
.site-header {
  position: sticky;
  top: 0;
  background-color: #ffffff;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
  z-index: 1000;
}

.header-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 12px 20px;
  display: flex;
  align-items: center;
  justify-content: flex-start;
}

.brand-logo img {
  height: 42px;
  width: auto;
  display: block;
  object-fit: contain;
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero-section {
  background: linear-gradient(135deg, #ffffff 0%, var(--primary-light) 100%);
  padding: 60px 20px;
  border-bottom: 1px solid var(--border-color);
}

.hero-container {
  max-width: 1100px;
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 40px;
}

.hero-content {
  flex: 1;
}

.hero-content h1 {
  font-size: 2.5rem;
  color: var(--text-main);
  margin-bottom: 15px;
  font-weight: 700;
}

.hero-subheading {
  font-size: 1.2rem;
  color: var(--text-muted);
  max-width: 600px;
}

.hero-illustration {
  flex: 0 0 180px;
  display: flex;
  justify-content: center;
}

.hero-svg {
  width: 160px;
  height: 160px;
}

.shape-bg {
  fill: var(--primary);
  opacity: 0.1;
}

.shape-check {
  fill: none;
  stroke: var(--primary);
  stroke-width: 12;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.shape-float1 {
  fill: var(--primary);
  animation: float1 4s ease-in-out infinite;
}

.shape-float2 {
  fill: var(--primary);
  opacity: 0.5;
  animation: float2 5s ease-in-out infinite;
}

@keyframes float1 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes float2 {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(8px); }
}

/* ==========================================================================
   Quick Navigation
   ========================================================================== */
.quick-nav {
  background: #ffffff;
  border-bottom: 1px solid var(--border-color);
  position: sticky;
  top: 66px;
  z-index: 900;
}

.quick-nav-container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 20px;
  display: flex;
  gap: 15px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: none;
}

.quick-nav-container::-webkit-scrollbar {
  display: none;
}

.nav-item {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 500;
  padding: 6px 12px;
  border-radius: 20px;
  transition: var(--transition-fast);
  background: var(--bg-main);
}

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

/* ==========================================================================
   Main Content Layout
   ========================================================================== */
.content-wrapper {
  max-width: 900px;
  margin: 40px auto;
  padding: 0 20px;
  display: flex;
  flex-direction: column;
  gap: 25px;
}

/* ==========================================================================
   Expandable Cards / Accordion
   ========================================================================== */
.info-card {
  background-color: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  padding: 25px;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.info-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 12px;
}

.card-title-group {
  display: flex;
  align-items: center;
  gap: 12px;
}

.icon-wrapper {
  width: 42px;
  height: 42px;
  border-radius: 10px;
  background-color: var(--primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  transition: var(--transition-fast);
}

.info-card:hover .icon-wrapper {
  transform: scale(1.05) rotate(-3deg);
}

.card-icon {
  width: 24px;
  height: 24px;
  fill: var(--primary);
}

.card-title-group h2 {
  font-size: 1.35rem;
  color: var(--text-main);
  font-weight: 600;
}

.card-summary p {
  color: var(--text-muted);
  font-size: 1.05rem;
}

.location-badge {
  font-weight: 600;
  color: var(--primary) !important;
}

.expandable-content {
  max-height: 0;
  opacity: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), opacity var(--transition-smooth);
}

.expandable-content.expanded {
  opacity: 1;
}

.content-inner {
  padding-top: 15px;
  border-top: 1px dashed var(--border-color);
  margin-top: 15px;
}

.content-inner p {
  margin-bottom: 12px;
  color: var(--text-main);
}

.content-inner p:last-child {
  margin-bottom: 0;
}

.feature-list {
  list-style: none;
  margin: 10px 0 15px 0;
  padding-left: 10px;
}

.feature-list li {
  position: relative;
  padding-left: 20px;
  margin-bottom: 6px;
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 10px;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background-color: var(--primary);
}

.disclaimer-box {
  background-color: #fff8f0;
  border-left: 4px solid var(--primary);
  padding: 12px 15px;
  border-radius: 0 8px 8px 0;
  margin-top: 15px;
  font-size: 0.95rem;
}

.formula-box {
  background-color: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
  text-align: center;
  padding: 12px;
  border-radius: 8px;
  margin-top: 15px;
}

.expand-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: none;
  border: none;
  color: var(--primary);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 10px 0 0 0;
  cursor: pointer;
  transition: color var(--transition-fast);
}

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

.btn-icon {
  width: 20px;
  height: 20px;
  fill: currentColor;
  transition: transform var(--transition-smooth);
}

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

/* ==========================================================================
   FAQ Section
   ========================================================================== */
.faq-section {
  margin-top: 20px;
}

.section-heading h2 {
  font-size: 1.6rem;
  text-align: center;
  margin-bottom: 25px;
  color: var(--text-main);
}

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

.faq-item {
  background: var(--card-bg);
  border: 1px solid var(--border-color);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.faq-toggle {
  width: 100%;
  text-align: left;
  padding: 18px 20px;
  background: none;
  border: none;
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--text-main);
  cursor: pointer;
  gap: 15px;
}

.faq-toggle:hover {
  background-color: var(--bg-main);
}

.faq-icon {
  width: 22px;
  height: 22px;
  fill: var(--primary);
  flex-shrink: 0;
  transition: transform var(--transition-smooth);
}

.faq-toggle[aria-expanded="true"] .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
  padding: 0 20px;
  background-color: #ffffff;
}

.faq-answer p {
  color: var(--text-muted);
  font-size: 1rem;
}

.faq-toggle[aria-expanded="true"] + .faq-answer {
  padding: 0 20px 18px 20px;
}

/* ==========================================================================
   CTA Section
   ========================================================================== */
.cta-section {
  background: linear-gradient(135deg, var(--primary) 0%, #ff8533 100%);
  color: #ffffff;
  padding: 40px 20px;
  border-radius: var(--radius);
  text-align: center;
  margin-top: 20px;
  box-shadow: var(--shadow-md);
}

.cta-section h3 {
  font-size: 1.5rem;
  margin-bottom: 20px;
}

.cta-btn {
  display: inline-block;
  background-color: #ffffff;
  color: var(--primary);
  font-weight: 700;
  text-decoration: none;
  padding: 12px 30px;
  border-radius: 30px;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

.cta-btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* ==========================================================================
   External Footer Loading State
   ========================================================================== */
.footer-loading {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 30px;
  background: var(--card-bg);
  border-top: 1px solid var(--border-color);
  color: var(--text-muted);
}

.spinner {
  width: 20px;
  height: 20px;
  border: 3px solid var(--border-color);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   Scroll Reveal Animations
   ========================================================================== */
.scroll-reveal {
  opacity: 0;
  transform: translateY(25px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.scroll-reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   Reduced Motion Accessibility
   ========================================================================== */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }
  
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  .scroll-reveal {
    opacity: 1;
    transform: none;
  }
}

/* ==========================================================================
   Responsive Styles
   ========================================================================== */
@media (max-width: 768px) {
  .hero-container {
    flex-direction: column;
    text-align: center;
    gap: 20px;
  }

  .hero-content h1 {
    font-size: 2rem;
  }

  .hero-illustration {
    flex: 0 0 auto;
  }

  .info-card {
    padding: 20px;
  }

  .quick-nav {
    top: 58px;
  }
}