/*
 * Modern Base Styles & Reset
 * Usambara Destination Website
 */

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

/* HTML & Body */
html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  margin: 0;
  padding: 0;
  font-family: var(--font-family-base);
  font-size: var(--font-size-base);
  line-height: var(--line-height-base);
  color: var(--color-text-primary);
  background-color: var(--color-background-beige);
}

/* Typography */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-family-heading);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--spacing-md);
  color: var(--color-primary-navy);
}

h1 {
  font-size: var(--font-size-4xl);
}

h2 {
  font-size: var(--font-size-3xl);
}

h3 {
  font-size: var(--font-size-2xl);
}

h4 {
  font-size: var(--font-size-xl);
}

h5 {
  font-size: var(--font-size-lg);
}

h6 {
  font-size: var(--font-size-base);
}

p {
  margin-bottom: var(--spacing-md);
  line-height: var(--line-height-relaxed);
}

/* Links */
a {
  color: var(--color-ocean-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-lake-blue);
}

a:focus {
  outline: 2px solid var(--color-sky-blue);
  outline-offset: 2px;
}

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

/* Lists */
ul, ol {
  list-style: none;
}

/* Buttons */
button {
  font-family: inherit;
  font-size: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

/* Container */
.container {
  width: 100%;
  max-width: var(--container-xl);
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

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

.text-center {
  text-align: center;
}

.text-left {
  text-align: left;
}

.text-right {
  text-align: right;
}

/* Modern Button Styles */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-md) var(--spacing-xl);
  font-weight: var(--font-weight-semibold);
  font-size: var(--font-size-base);
  line-height: 1;
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
  cursor: pointer;
  border: 2px solid transparent;
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-lake-blue);
  border-color: var(--color-lake-blue);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-secondary {
  background-color: var(--color-sunset-orange);
  color: var(--color-white);
  border-color: var(--color-sunset-orange);
}

.btn-secondary:hover {
  background-color: var(--color-sunset-orange-dark);
  border-color: var(--color-sunset-orange-dark);
  transform: translateY(-2px);
  box-shadow: var(--shadow-lg);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary-navy);
  border-color: var(--color-primary-navy);
}

.btn-outline:hover {
  background-color: var(--color-primary-navy);
  color: var(--color-white);
}

/* Card Component */
.card {
  background: var(--color-white);
  border-radius: var(--radius-xl);
  overflow: hidden;
  box-shadow: var(--shadow-md);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
}

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

.card img {
  width: 100%;
  height: 250px;
  object-fit: cover;
}

.card-content {
  padding: var(--spacing-lg);
}

.card h3 {
  margin-bottom: var(--spacing-sm);
  color: var(--color-primary-navy);
}

.card p {
  color: var(--color-gray);
  margin-bottom: var(--spacing-lg);
}

/* Grid System */
.grid {
  display: grid;
  gap: var(--spacing-xl);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}

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

.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}

.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* Section Spacing */
section {
  padding: var(--spacing-3xl) 0;
}

/* Responsive Typography */
@media (max-width: 768px) {
  html {
    font-size: 14px;
  }
  
  h1 {
    font-size: var(--font-size-3xl);
  }
  
  h2 {
    font-size: var(--font-size-2xl);
  }
  
  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* Accessibility */
@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;
  }
}

/* Focus Visible for Keyboard Navigation */
:focus-visible {
  outline: 3px solid var(--color-sky-blue);
  outline-offset: 2px;
}

/* Scroll Animations */
.fade-in-up {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.6s ease-out, transform 0.6s ease-out;
  will-change: opacity, transform;
}

.fade-in-up.visible {
  opacity: 1;
  transform: translateY(0);
}

/* Staggered delay for child elements if needed */
.delay-100.visible { transition-delay: 100ms; }
.delay-200.visible { transition-delay: 200ms; }
.delay-300.visible { transition-delay: 300ms; }

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  background-color: var(--color-primary-navy);
  color: var(--color-white);
  width: 45px;
  height: 45px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
  cursor: pointer;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s ease;
  z-index: 900;
  text-decoration: none;
}

.back-to-top:hover {
  background-color: var(--color-lake-blue);
  transform: translateY(-5px);
  color: var(--color-white);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* FAQ Accordion */
.faq-section {
  background-color: var(--color-background-light);
  padding: var(--spacing-4xl) 0;
}

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

.faq-item {
  background: var(--color-white);
  border-radius: var(--radius-lg);
  margin-bottom: var(--spacing-md);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.faq-question {
  width: 100%;
  text-align: left;
  padding: var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary-navy);
  cursor: pointer;
  transition: background-color 0.2s;
}

.faq-question:hover {
  background-color: rgba(0,0,0,0.02);
}

.faq-question i {
  transition: transform 0.3s ease;
}

.faq-item.active .faq-question i {
  transform: rotate(180deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.3s ease-out;
  padding: 0 var(--spacing-lg);
}

.faq-item.active .faq-answer {
  padding-bottom: var(--spacing-lg);
  /* Max-height will be set by JS or generic large value */
  max-height: 500px; 
}