/* ===================================================================
   DIMINISHED CAPACITY - Modern CSS Design System
   A streamlined, elegant redesign for the Nigerian Pavilion website
   =================================================================== */

/* === CSS CUSTOM PROPERTIES === */
:root {
  /* Color Palette - Elegant Museum Gallery Theme (Light) */
  --color-bg-primary: hsl(0, 0%, 100%);
  --color-bg-secondary: hsl(0, 0%, 98%);
  --color-bg-tertiary: hsl(0, 0%, 96%);
  --color-surface: hsla(0, 0%, 0%, 0.03);
  --color-surface-hover: hsla(0, 0%, 0%, 0.05);

  --color-text-primary: hsl(0, 0%, 5%);
  --color-text-secondary: hsl(0, 0%, 20%);
  --color-text-muted: hsl(0, 0%, 40%);

  --color-accent-primary: hsl(0, 75%, 45%);
  /* Classic museum red accent */
  --color-accent-secondary: hsl(0, 0%, 0%);
  --color-accent-gradient: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));

  --color-border: hsla(0, 0%, 0%, 0.1);
  --color-border-hover: hsla(0, 0%, 0%, 0.2);

  /* Typography Scale */
  --font-primary: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen-Sans, Ubuntu, Cantarell, 'Helvetica Neue', sans-serif;
  --font-display: 'Source Serif 4', 'Source Serif Pro', Georgia, serif;

  --font-size-xs: 0.75rem;
  --font-size-sm: 0.875rem;
  --font-size-base: 1rem;
  --font-size-lg: 1.125rem;
  --font-size-xl: 1.25rem;
  --font-size-2xl: 1.5rem;
  --font-size-3xl: 1.875rem;
  --font-size-4xl: 2.25rem;
  --font-size-5xl: 3rem;
  --font-size-6xl: 3.75rem;

  /* Spacing Scale */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.25rem;
  --space-6: 1.5rem;
  --space-8: 2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;

  /* Layout */
  --max-width-content: 1100px;
  --max-width-text: 75ch;
  --border-radius: 2px;
  /* Sharper edges for a more formal look */
  --border-radius-lg: 4px;

  /* Refined Glassmorphism for Light Theme */
  --glass-bg: hsla(0, 0%, 100%, 0.85);
  --glass-border: hsla(0, 0%, 0%, 0.08);
  --glass-blur: blur(10px);

  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* === RESET & BASE === */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

figure {
  margin: 0 auto;
  max-width: 100%;
}

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-primary);
  font-size: var(--font-size-base);
  line-height: 1.8;
  color: var(--color-text-primary);
  background-color: var(--color-bg-primary);
  /* Subtler texture for museum feel */
  background-image:
    radial-gradient(at 0% 0%, hsla(0, 0%, 0%, 0.01) 0, transparent 50%),
    radial-gradient(at 100% 100%, hsla(0, 0%, 0%, 0.01) 0, transparent 50%);
  background-attachment: fixed;
}

/* === TYPOGRAPHY === */
h1,
h2,
h3,
h4,
h5,
h6 {
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.2;
  color: var(--color-text-primary);
  margin-bottom: var(--space-6);
}

h1 {
  font-size: clamp(var(--font-size-4xl), 5vw, var(--font-size-6xl));
  font-style: italic;
  font-weight: 400;
  letter-spacing: -0.02em;
}

h2 {
  font-size: clamp(var(--font-size-3xl), 4vw, var(--font-size-5xl));
  letter-spacing: -0.01em;
  font-weight: 500;
}

h2.subtitle {
  font-size: var(--font-size-xl);
  font-weight: 400;
  margin-top: calc(-1 * var(--space-4));
  color: var(--color-text-secondary);
}

h2.emphasizes {
  font-style: italic;
  font-weight: 600;
}

h3 {
  font-size: clamp(var(--font-size-2xl), 3vw, var(--font-size-4xl));
}

h4 {
  font-size: var(--font-size-2xl);
}

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

h6 {
  font-size: var(--font-size-lg);
  font-weight: 500;
}

p {
  margin-bottom: var(--space-5);
  color: var(--color-text-secondary);
}

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

a:hover {
  color: var(--color-accent-secondary);
}

/* === LAYOUT === */
.container {
  max-width: var(--max-width-content);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

.container-narrow {
  max-width: var(--max-width-text);
  margin: 0 auto;
  padding: 0 var(--space-6);
}

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

/* === HEADER & NAVIGATION === */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  width: 100%;
  z-index: 100;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border-bottom: 1px solid var(--glass-border);
  transition: all var(--transition-base);
}

body {
  padding-top: 254px;
}

@media (max-width: 900px) {
  body {
    padding-top: 200px;
  }
}

@media (max-width: 768px) {
  body {
    padding-top: 100px;
  }

  .site-header {
    position: sticky;
  }
}

.header-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--space-8) 0;
  gap: var(--space-6);
}

.site-branding {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
  transition: all var(--transition-base);
}

.site-header.header-scrolled .site-branding {
  max-height: 0;
  opacity: 0;
  margin: 0;
  padding: 0;
  overflow: hidden;
  pointer-events: none;
}

.site-logo {
  display: block;
  width: 80px;
  height: auto;
  transition: all var(--transition-base);
}

.site-header.header-scrolled .site-logo {
  transform: scale(0);
}

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

.site-title {
  font-size: var(--font-size-3xl);
  font-style: italic;
  font-weight: 400;
  margin: 0;
  letter-spacing: -0.01em;
}

.site-title a {
  color: var(--color-text-primary);
  text-decoration: none;
}

.site-header.header-scrolled .header-content {
  padding: var(--space-3) 0;
  gap: 0;
}

.site-header.header-scrolled .site-nav a {
  font-size: var(--font-size-sm);
}

.site-nav ul {
  list-style: none;
  display: flex;
  gap: var(--space-8);
  align-items: center;
}

.site-nav a {
  font-size: var(--font-size-base);
  color: var(--color-text-secondary);
  position: relative;
  padding-bottom: var(--space-1);
  transition: color var(--transition-base);
}

.site-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent-gradient);
  transition: width var(--transition-base);
}

.site-nav a:hover {
  color: var(--color-text-primary);
}

.site-nav a:hover::after,
.site-nav a.active::after {
  width: 100%;
}

/* Mobile Navigation Toggle */
.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  cursor: pointer;
  padding: var(--space-2);
  transition: color var(--transition-fast);
}

.nav-toggle:hover {
  color: var(--color-accent-primary);
}

@media (max-width: 768px) {
  .nav-toggle {
    display: block;
  }

  .site-nav {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: var(--glass-bg);
    backdrop-filter: var(--glass-blur);
    -webkit-backdrop-filter: var(--glass-blur);
    border-bottom: 1px solid var(--glass-border);
    padding: var(--space-6);
    max-height: 0;
    overflow: hidden;
    opacity: 0;
    transition: all var(--transition-base);
  }

  .site-nav.active {
    max-height: 400px;
    opacity: 1;
  }

  .site-nav ul {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }
}

/* === HERO SECTION === */
.hero-section {
  padding: var(--space-12) 0;
  text-align: center;
}

.hero-image-wrapper {
  max-width: 900px;
  margin: 0 auto var(--space-10);
}

.hero-banner {
  width: 100%;
  height: auto;
  display: block;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.05);
  transition: transform var(--transition-slow);
}

.hero-banner:hover {
  transform: translateY(-5px);
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(var(--font-size-4xl), 8vw, var(--font-size-6xl));
  font-weight: 400;
  font-style: italic;
  margin-bottom: var(--space-4);
  letter-spacing: -0.03em;
}

.hero-subtitle {
  font-family: var(--font-primary);
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  max-width: 800px;
  margin: 0 auto var(--space-10);
  line-height: 1.6;
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.hero-cta {
  margin-top: var(--space-10);
}

.btn {
  display: inline-block;
  padding: var(--space-3) var(--space-8);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  font-size: var(--font-size-sm);
  transition: all var(--transition-base);
  border: 1px solid var(--color-text-primary);
}

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

.btn-primary:hover {
  background: var(--color-bg-primary);
  color: var(--color-text-primary);
}

.hero-image:hover {
  transform: scale(1.02);
}

/* === GALLERY === */
.image-gallery.grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--space-6);
  margin: var(--space-12) 0;
}

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

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

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

.image-gallery.grid.columns-5 {
  grid-template-columns: repeat(5, 1fr);
}

/* Masonry Layout */
.image-gallery.masonry {
  display: block;
  column-gap: var(--space-4);
  width: 100%;
}

.image-gallery.masonry.columns-4 {
  column-count: 4;
}

.image-gallery.masonry figure {
  display: inline-block;
  width: 100%;
  margin-bottom: var(--space-2);
  break-inside: avoid;
}

.image-gallery.masonry img {
  display: block;
  width: 100%;
  height: auto;
}

@media (max-width: 992px) {
  .image-gallery.masonry.columns-4 {
    column-count: 3;
  }
}

@media (max-width: 768px) {
  .image-gallery.masonry.columns-4 {
    column-count: 2;
  }
}

@media (max-width: 480px) {
  .image-gallery.masonry.columns-4 {
    column-count: 1;
  }
}

@media (max-width: 900px) {

  .image-gallery.grid.columns-3,
  .image-gallery.grid.columns-4,
  .image-gallery.grid.columns-5 {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 600px) {

  .image-gallery.grid,
  .image-gallery.grid.columns-2,
  .image-gallery.grid.columns-3,
  .image-gallery.grid.columns-4,
  .image-gallery.grid.columns-5 {
    grid-template-columns: 1fr;
  }
}

.image-gallery.grid.small {
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-4);
}

.image-gallery.grid.small figcaption {
  font-size: var(--font-size-xs);
}

.image-gallery figure {
  margin-bottom: 0;
}

.image-gallery img {
  width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
  transition: transform var(--transition-base);
}

.image-gallery figure:hover img {
  transform: scale(1.02);
}

.caption,
figcaption {
  font-size: var(--font-size-sm);
  color: var(--color-text-muted);
  margin-top: var(--space-4);
  line-height: 1.6;
  font-style: italic;
  text-align: center;
  max-width: 800px;
  margin-left: auto;
  margin-right: auto;
}

.text-center.caption,
.text-center figcaption {
  text-align: center;
}

/* === CONTENT ELEMENTS === */
.separator {
  border: none;
  border-top: 1px solid var(--color-border);
  width: 150px;
  margin: var(--space-12) auto;
}

.signature {
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--font-size-lg);
  margin-top: var(--space-8);
  text-align: right;
}

.participant-links {
  list-style: none;
  margin: var(--space-8) 0;
  padding: 0;
  column-count: 2;
  gap: var(--space-12);
}

@media (max-width: 600px) {
  .participant-links {
    column-count: 1;
  }
}

.participant-links li {
  margin-bottom: var(--space-2);
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* === CARDS === */
.card {
  background: var(--color-bg-secondary);
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius-lg);
  padding: var(--space-8);
  transition: all var(--transition-base);
}

.card:hover {
  border-color: var(--color-border-hover);
  transform: translateY(-2px);
  box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.card-header {
  margin-bottom: var(--space-6);
}

.card-title {
  margin-bottom: var(--space-3);
}

.card-body {
  color: var(--color-text-secondary);
}

/* === CONTENT SECTIONS === */
.content-section {
  margin: var(--space-16) 0;
}

.content-section h2 {
  margin-bottom: var(--space-8);
}

blockquote {
  border-left: 4px solid var(--color-accent-primary);
  padding-left: var(--space-8);
  margin: var(--space-12) min(5vw, var(--space-20));
  font-size: var(--font-size-xl);
  font-style: italic;
  line-height: 1.6;
  color: var(--color-text-primary);
  font-family: var(--font-display);
}

blockquote p {
  margin-bottom: var(--space-4);
  color: inherit;
}

blockquote cite {
  display: block;
  font-size: var(--font-size-sm);
  font-style: normal;
  font-weight: 600;
  margin-top: var(--space-4);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.simple-quote {
  border: none;
  padding: 0;
  margin: var(--space-12) 0;
  text-align: center;
  font-size: var(--font-size-lg);
}

/* === VIDEO & MEDIA === */
.video-container {
  position: relative;
  padding-bottom: 56.25%;
  /* 16:9 ratio */
  height: 0;
  overflow: hidden;
  max-width: 900px;
  width: 96%;
  margin: var(--space-16) auto;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.1);
  background: #000;
}

.video-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  border: 0;
}

.content-image,
.content-image.full-width,
.content-image.centered,
.review-item {
  display: flex !important;
  flex-direction: column !important;
  align-items: center !important;
  text-align: center !important;
  margin: var(--space-12) auto !important;
  width: 96% !important;
  max-width: var(--max-width-content) !important;
}

.content-image img,
.review-item img,
.image-gallery figure img {
  margin: 0 auto !important;
  max-width: 100% !important;
  height: auto !important;
  display: block !important;
}

.content-image.small img {
  max-width: 400px;
  width: 100%;
  height: auto;
}

.content-image.logo-large img {
  max-width: 100% !important;
  height: auto !important;
  display: block;
}

figure {
  margin: 0 auto;
  max-width: 100%;
  display: block;
}

/* === LIGHTBOX === */
.lightbox {
  display: none;
  position: fixed;
  z-index: 2000;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.98);
  cursor: zoom-out;
}

.lightbox.active {
  display: flex;
}

.lightbox-wrapper {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  padding: var(--space-12);
}

.lightbox-content {
  max-width: 90%;
  max-height: 80vh;
  object-fit: contain;
  box-shadow: 0 10px 40px rgba(0, 0, 0, 0.1);
  cursor: pointer;
  /* Image is clickable to navigate */
}

.lightbox-caption {
  margin-top: var(--space-6);
  font-family: var(--font-display);
  font-style: italic;
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
  text-align: center;
  max-width: 800px;
  padding: 0 var(--space-4);
}

.lightbox-nav {
  position: absolute;
  top: 0;
  bottom: 0;
  width: 20%;
  border: none;
  background: transparent;
  color: var(--color-text-primary);
  font-size: 2rem;
  opacity: 0;
  transition: opacity var(--transition-base);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
}

.lightbox-nav:hover {
  opacity: 0.5;
}

.lightbox-nav.prev {
  left: 0;
}

.lightbox-nav.next {
  right: 0;
}

.lightbox-close {
  position: absolute;
  top: var(--space-8);
  right: var(--space-8);
  background: none;
  border: none;
  font-size: 2rem;
  color: var(--color-text-primary);
  cursor: pointer;
  line-height: 1;
  padding: var(--space-2);
}

.image-gallery figure img {
  cursor: zoom-in;
}

.lightbox {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  z-index: 1000;
  display: none;
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}

.lightbox.active {
  display: flex;
}

.lightbox img {
  max-width: 90vw;
  max-height: 90vh;
  object-fit: contain;
  border-radius: var(--border-radius);
}

.lightbox-close {
  position: absolute;
  top: var(--space-6);
  right: var(--space-6);
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--border-radius);
  color: var(--color-text-primary);
  font-size: var(--font-size-2xl);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.lightbox-close:hover {
  background: var(--color-surface-hover);
  transform: rotate(90deg);
}

/* === BIO & TEAM === */
.team-section {
  margin: var(--space-24) 0;
  padding: var(--space-8);
  background: var(--color-bg-primary);
}

.team-section h4 {
  font-family: var(--font-display);
  font-size: var(--font-size-xl);
  margin-bottom: var(--space-8);
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--space-4);
  display: inline-block;
}

.profile-row {
  display: flex;
  gap: var(--space-12);
  align-items: center;
  margin-bottom: var(--space-12);
  padding: var(--space-8);
  background: var(--color-bg-secondary);
  border-radius: var(--border-radius-lg);
  transition: box-shadow var(--transition-base);
}

.profile-row:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.03);
}

@media (max-width: 768px) {
  .profile-row {
    flex-direction: column;
    text-align: center;
    padding: var(--space-12) var(--space-6);
  }
}

.bio-image {
  flex: 0 0 auto;
}

.bio-image img {
  border-radius: var(--border-radius);
  box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
  display: block;
  transition: transform var(--transition-base);
}

.bio-image:hover img {
  transform: scale(1.02);
}

/* Portrait Sizes */
.profile-image-small {
  width: 150px !important;
  height: auto !important;
}

.profile-image-large {
  width: 180px !important;
  height: auto !important;
}

.bio-content {
  flex: 1;
}

.bio-content strong {
  font-family: var(--font-display);
  font-size: var(--font-size-2xl);
  color: var(--color-text-primary);
  display: block;
  margin-bottom: var(--space-1);
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-6);
  margin: var(--space-12) 0;
}

/* === SPONSORS === */
.sponsors-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: var(--space-12);
  margin: var(--space-16) 0;
}

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

.sponsor-item img {
  max-width: 180px;
  height: auto;
  margin-bottom: var(--space-4);
  filter: grayscale(1);
  opacity: 0.7;
  transition: all var(--transition-base);
}

.sponsor-item:hover img {
  filter: grayscale(0);
  opacity: 1;
}

/* === FOOTER === */
.site-footer {
  background: var(--color-bg-secondary);
  border-top: 1px solid var(--color-border);
  padding: var(--space-12) 0 var(--space-8);
  margin-top: var(--space-24);
}

.footer-content {
  text-align: center;
  color: var(--color-text-muted);
  font-size: var(--font-size-sm);
}

/* === ANIMATIONS === */
@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(20px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fade-in {
  animation: fadeIn var(--transition-slow) ease-out;
}

.fade-in-delayed {
  animation: fadeIn var(--transition-slow) ease-out 150ms;
  animation-fill-mode: backwards;
}

/* Scroll-triggered animations */
.scroll-fade {
  opacity: 0;
  transform: translateY(30px);
  transition: all 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

/* === UTILITY CLASSES === */
.text-center {
  text-align: center;
}

.text-muted {
  color: var(--color-text-muted);
}

.mt-0 {
  margin-top: 0;
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-8 {
  margin-top: var(--space-8);
}

.mt-12 {
  margin-top: var(--space-12);
}

.mt-16 {
  margin-top: var(--space-16);
}

.mb-0 {
  margin-bottom: 0;
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-8 {
  margin-bottom: var(--space-8);
}

.mb-12 {
  margin-bottom: var(--space-12);
}

.mb-16 {
  margin-bottom: var(--space-16);
}

/* === RESPONSIVE === */
@media (max-width: 1024px) {
  :root {
    --space-20: 3.5rem;
    --space-24: 4.5rem;
  }
}

@media (max-width: 768px) {
  :root {
    --space-16: 3rem;
    --space-20: 3rem;
    --space-24: 3.5rem;
  }

  .header-content {
    flex-wrap: wrap;
  }

  .gallery {
    grid-template-columns: 1fr;
    gap: var(--space-4);
  }
}

@media (max-width: 480px) {
  .container {
    padding: 0 var(--space-4);
  }

  .hero {
    min-height: 50vh;
  }
}