/* 
  Design System: The Tactile Archive
  Project: Kantipur Montessori Training Center
*/

:root {
  /* Colors */
  --primary: #425643;
  --primary-container: #5a6e5a;
  --on-primary: #ffffff;
  --secondary: #8e4c3c;
  --secondary-container: #fea995;
  --on-secondary: #ffffff;
  --background: #fef8f3;
  --on-background: #1d1b19;
  --surface: #fef8f3;
  --surface-container-lowest: #ffffff;
  --surface-container-low: #f8f3ee;
  --surface-container: #f2ede8;
  --surface-container-high: #ece7e2;
  --surface-container-highest: #e6e2dd;
  --on-surface: #1d1b19;
  --on-surface-variant: #434842;
  --outline-variant: rgba(195, 200, 192, 0.15); /* Ghost Border */
  
  /* Spacing */
  --spacing-4: 1rem;
  --spacing-6: 1.5rem;
  --spacing-8: 2rem;
  --spacing-12: 3rem;
  --spacing-20: 5rem;
  --spacing-24: 6rem;
  
  /* Radius */
  --radius-sm: 0.5rem;
  --radius-md: 1.5rem;
  --radius-lg: 2rem;
  --radius-xl: 3rem;
  --radius-full: 9999px;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1);
  --nav-height: 80px;
}

@media (max-width: 768px) {
  :root {
    --nav-height: 64px;
  }
}

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

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

body {
  background-color: var(--background);
  color: var(--on-surface);
  font-family: 'Plus Jakarta Sans', sans-serif;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Typography */
h1, h2, h3, .display-font {
  font-family: 'Noto Serif', serif;
  font-weight: 700;
  color: var(--on-surface);
  line-height: 1.2;
}

.text-editorial {
  letter-spacing: -0.02em;
}

.display-lg { font-size: 3.5rem; }
.display-md { font-size: 2.75rem; }
.headline-lg { font-size: 2.25rem; }
.headline-md { font-size: 1.75rem; }
.body-lg { font-size: 1.125rem; }
.body-md { font-size: 1rem; }
.label-md { font-size: 0.875rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.1em; }

/* Layout Helpers */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-6);
}

.section-padding {
  padding: var(--spacing-20) 0;
}

.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: var(--spacing-12); }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--spacing-8); }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--spacing-6); }

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

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
  .display-lg { font-size: 2.5rem; }
  .section-padding { padding: var(--spacing-12) 0; }
}

/* Components */

/* Navigation */
.nav-header {
  position: sticky;
  top: 0;
  width: 100%;
  z-index: 1000;
  background: rgba(255, 255, 255, 0.7);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--outline-variant);
  transition: var(--transition-smooth);
}

.nav-header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  box-shadow: 0 5px 20px rgba(0,0,0,0.05);
}

.nav-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  height: var(--nav-height);
}

/* Removed fixed height here as it is now handled by --nav-height variable in :root */

.nav-logo {
  display: flex;
  align-items: center;
  gap: 1rem;
  text-decoration: none;
}

.nav-logo img {
  height: 52px;
  width: auto;
  object-fit: contain;
  transition: var(--transition-smooth);
}

.nav-logo:hover img {
  transform: scale(1.05);
}

.logo-text h4 { 
  font-size: 1.25rem; 
  line-height: 1.1; 
  color: var(--primary);
}

.logo-text span { 
  font-size: 0.625rem; 
  font-weight: 700; 
  text-transform: uppercase; 
  color: var(--on-surface-variant); 
  opacity: 0.8; 
  letter-spacing: 0.05em;
}

@media (max-width: 768px) {
  .logo-text span { display: none; }
  .logo-text h4 { font-size: 1.125rem; }
  .nav-logo img { height: 42px; }
}


.nav-links {
  display: flex;
  gap: var(--spacing-8);
  list-style: none;
}

.nav-links a {
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--on-surface-variant);
  transition: var(--transition-smooth);
}

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

/* Hamburger Menu Toggle */
.menu-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.5rem;
}

@media (max-width: 1024px) {
  .menu-toggle { display: block; }
  .nav-links {
    position: fixed;
    top: var(--nav-height);
    right: -100%;
    width: 280px;
    height: calc(100vh - var(--nav-height));
    background: var(--surface-container-lowest);
    flex-direction: column;
    padding: var(--spacing-12);
    gap: var(--spacing-6);
    box-shadow: -10px 0 30px rgba(0,0,0,0.05);
    transition: var(--transition-smooth);
    z-index: 999;
  }
  .nav-links.active { right: 0; }
  .header-cta { display: none !important; }
  .lang-switcher { margin-left: auto; margin-right: 0.5rem; transform: scale(0.9); }
}

/* Language Switcher */
.lang-switcher {
  display: flex;
  gap: 0.5rem;
  align-items: center;
  background: var(--surface-container-low);
  padding: 0.25rem;
  border-radius: var(--radius-full);
  border: 1px solid var(--outline-variant);
}

.lang-btn {
  padding: 0.4rem 0.8rem;
  border-radius: var(--radius-full);
  border: none;
  background: none;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  color: var(--on-surface-variant);
  transition: var(--transition-smooth);
}

.lang-btn.active {
  background: var(--primary);
  color: white;
  box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.form-input {
  width: 100%;
  padding: 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--outline-variant);
  background-color: var(--surface-container-lowest);
  font-family: inherit;
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
  outline-color: var(--primary);
  transition: var(--transition-smooth);
}

.form-input:focus {
  border-color: var(--primary);
  background-color: white;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0.875rem 2rem;
  border-radius: var(--radius-full);
  font-weight: 700;
  font-size: 0.875rem;
  text-decoration: none;
  border: none;
  cursor: pointer;
  transition: var(--transition-smooth);
}

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

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 10px 30px rgba(66, 86, 67, 0.15);
}

.btn-secondary {
  background-color: var(--secondary-container);
  color: var(--secondary);
}

.btn-secondary:hover {
  background-color: #fca18c;
}

.btn-tertiary {
  background: none;
  color: var(--primary);
  padding: 0.5rem 0;
  border-bottom: 2px solid transparent;
  border-radius: 0;
}

.btn-tertiary:hover {
  border-bottom-color: var(--primary);
}

/* Cards */
.card {
  padding: var(--spacing-8);
  border-radius: var(--radius-xl);
  background-color: var(--surface-container);
  transition: var(--transition-smooth);
}

.card:hover {
  transform: translateY(-5px);
  background-color: var(--surface-container-high);
}

.course-card {
  display: flex;
  gap: var(--spacing-8);
  background-color: var(--surface-container-lowest);
  border-radius: var(--radius-xl);
  overflow: hidden;
  margin-bottom: var(--spacing-12);
}

.course-image {
  flex: 0 0 40%;
  overflow: hidden;
}

.course-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.course-content {
  flex: 1;
  padding: var(--spacing-12);
}

@media (max-width: 768px) {
  .course-card { 
    flex-direction: column !important; 
    border-radius: var(--radius-lg);
  }
  .course-image { flex: 0 0 250px; }
  .course-content { padding: var(--spacing-6); }
}

/* Tonal Sections */
.bg-subtle { background-color: var(--surface-container-low); }
.bg-deep { background-color: var(--primary); color: var(--on-primary); }
.bg-deep h1, .bg-deep h2, .bg-deep h3 { color: var(--on-primary); }

/* Feature / Why Choose Us */
.feature-box {
  padding: var(--spacing-8);
  border-radius: var(--radius-lg);
  background: var(--surface-container-low);
  text-align: center;
  transition: var(--transition-smooth);
}

.feature-box:hover {
  transform: translateY(-5px);
  background: white;
  box-shadow: 0 10px 30px rgba(0,0,0,0.05);
}

.feature-icon {
  font-size: 3rem;
  margin-bottom: 1.5rem;
  display: block;
}

/* Accordion FAQ */
.accordion {
  width: 100%;
  max-width: 800px;
  margin: 0 auto;
}

.accordion-item {
  margin-bottom: 1rem;
  border-radius: var(--radius-md);
  background: var(--surface-container-low);
  overflow: hidden;
  transition: var(--transition-smooth);
}

.accordion-trigger {
  width: 100%;
  padding: 1.5rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: none;
  border: none;
  cursor: pointer;
  text-align: left;
  font-family: 'Plus Jakarta Sans', sans-serif;
  font-weight: 700;
  color: var(--on-surface);
}

.accordion-trigger .material-symbols-outlined {
  transition: var(--transition-smooth);
}

.accordion-content {
  max-height: 0;
  padding: 0 1.5rem;
  overflow: hidden;
  transition: var(--transition-smooth);
  opacity: 0;
}

.accordion-item.active {
  background: white;
  box-shadow: 0 5px 15px rgba(0,0,0,0.05);
}

.accordion-item.active .accordion-content {
  max-height: 200px;
  padding-bottom: 1.5rem;
  opacity: 1;
}

.accordion-item.active .accordion-trigger .material-symbols-outlined {
  transform: rotate(180deg);
}

/* Mid-page CTA */
.cta-banner {
  background: linear-gradient(135deg, var(--primary), var(--primary-container));
  color: white;
  padding: var(--spacing-12) 0;
  border-radius: var(--radius-xl);
  text-align: center;
}

.cta-banner h2 { color: white; margin-bottom: 1.5rem; }

@media (max-width: 768px) {
  .cta-banner { padding: var(--spacing-8) var(--spacing-4); border-radius: var(--radius-lg); }
  .cta-banner h2 { font-size: 1.5rem; }
}

/* Stat Counter */
.stat-item h2 {
  font-size: 3.5rem;
  color: var(--primary);
  margin: 0;
}

/* Responsive Overrides */
@media (max-width: 768px) {
  .display-lg { font-size: 2rem; }
  .display-md { font-size: 1.6rem; }
  .headline-lg { font-size: 1.75rem; }
  .body-lg { font-size: 1rem; }
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr !important; gap: var(--spacing-6); }
  .course-image { flex: 0 0 200px; }
  .section-padding { padding: var(--spacing-12) 0; }
  
  .hero-btns { flex-direction: column; width: 100%; }
  .hero-btns .btn { width: 100%; }
  
  /* Reset flex alignment in cards for mobile */
  .course-content > div { flex-direction: column !important; align-items: flex-start !important; gap: 1rem; }
  .course-content .btn-tertiary { width: fit-content; }
}

/* Footer */
footer {
  background-color: #1a1a1a;
  color: #a1a1a1;
  padding: var(--spacing-20) 0 var(--spacing-8);
}

footer h5 { color: white; margin-bottom: var(--spacing-6); }
footer ul { list-style: none; }
footer ul li { margin-bottom: 0.75rem; }
footer a { color: inherit; text-decoration: none; transition: var(--transition-smooth); }
footer a:hover { color: var(--primary-container); }

.footer-bottom {
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  margin-top: var(--spacing-12);
  padding-top: var(--spacing-8);
  text-align: center;
  font-size: 0.75rem;
}

/* Social Media Icons */
.social-links {
  display: flex;
  gap: 1.25rem;
  margin-top: 1.5rem;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.05);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  transition: var(--transition-smooth);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.social-icon svg {
  width: 20px;
  height: 20px;
  fill: currentColor;
}

.social-icon:hover {
  background: var(--primary);
  transform: translateY(-3px);
  border-color: var(--primary);
  box-shadow: 0 8px 15px rgba(0, 0, 0, 0.3);
}

.social-icon.facebook:hover {
  background: #1877F2;
  border-color: #1877F2;
}

.social-icon.instagram:hover {
  background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%);
  border-color: transparent;
}

.social-icon.tiktok:hover {
  background: #000000;
  border-color: #000000;
}

/* Footer Logo Redesign */
.footer-logo {
  height: 60px;
  width: 90px;
  object-fit: contain;
  background: rgba(210, 233, 208, 0.15); /* Soft greenish tint */
  padding: 8px 12px;
  border-radius: 50% / 50%; /* Pure oval */
  border: 1px solid rgba(66, 86, 67, 0.2);
  transition: var(--transition-smooth);
  box-shadow: 0 4px 12px rgba(0,0,0,0.1);
}

.footer-logo:hover {
  background: rgba(210, 233, 208, 0.25);
  transform: scale(1.05);
  box-shadow: 0 6px 16px rgba(0,0,0,0.15);
}

/* Animations */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

.reveal {
  opacity: 0;
  transition: var(--transition-smooth);
}

.reveal.active {
  animation: fadeInUp 0.8s forwards;
}

/* Gallery Styles */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: var(--spacing-6);
  min-height: 400px; /* Ensure visibility for intersection observer */
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  cursor: pointer;
  background: var(--surface-container-low);
  box-shadow: var(--shadow-sm);
  transition: var(--transition-smooth);
  aspect-ratio: 1/1;
}

.gallery-item img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: var(--transition-smooth);
}

.gallery-item:hover {
  transform: translateY(-8px);
  box-shadow: var(--shadow-lg);
}

.gallery-item:hover img {
  transform: scale(1.08);
}

/* Lightbox */
.lightbox {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(0,0,0,0.9);
  display: none;
  justify-content: center;
  align-items: center;
  z-index: 10000;
  padding: var(--spacing-8);
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90%;
  max-height: 90%;
  border-radius: var(--radius-sm);
  box-shadow: 0 0 40px rgba(0,0,0,0.5);
}

.lightbox-close {
  position: absolute;
  top: 2rem;
  right: 2rem;
  color: white;
  font-size: 3rem;
  cursor: pointer;
}