/* OXGN Mobile-First Brand Website - Brand System & Layout */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

:root {
  --oxgn-black: #0E1011;
  --oxgn-white: #F0F0F0;
  --oxgn-lemon: #CBED6E;
  --oxgn-surge: #6ACDD2;
  --oxgn-purple: #5E3CA0;
  --oxgn-light-purple: #6470DB;
  --gradient: linear-gradient(135deg, #6ACDD2 0%, #CBED6E 100%);
  --gradient-subtle: linear-gradient(135deg, rgba(106, 205, 210, 0.1) 0%, rgba(203, 237, 110, 0.1) 100%);
  --gradient-header: linear-gradient(135deg, rgba(106, 205, 210, 0.2) 0%, rgba(203, 237, 110, 0.2) 100%);
  --spacing-xs: 8px;
  --spacing-sm: 16px;
  --spacing-md: 24px;
  --spacing-lg: 32px;
  --spacing-xl: 48px;
  --spacing-2xl: 80px;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 24px;
  --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --touch-target: 44px;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--oxgn-black);
  color: var(--oxgn-white);
  line-height: 1.6;
  font-size: 16px;
  overflow-x: hidden;
}

/* Hero Section */
.hero {
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-lg) var(--spacing-md);
  position: relative;
  overflow: hidden;
}

.hero::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: min(400px, 80vw);
  height: min(400px, 80vw);
  border-radius: 50%;
  background: var(--gradient);
  opacity: 0.15;
  filter: blur(80px);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 480px;
}

.hero-logo {
  width: 160px;
  max-width: 60vw;
  height: auto;
  margin-bottom: var(--spacing-lg);
}

.hero-tagline {
  font-size: 1.25rem;
  font-weight: 300;
  color: rgba(240, 240, 240, 0.9);
  letter-spacing: 0.5px;
  line-height: 1.5;
  margin-bottom: var(--spacing-2xl);
}

.hero-scroll {
  margin-top: var(--spacing-xl);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-xs);
}

.hero-scroll-text {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 2px;
  color: rgba(240, 240, 240, 0.5);
  text-decoration: none;
}

.hero-scroll-text:hover {
  color: var(--oxgn-surge);
}

.hero-scroll-icon {
  width: 24px;
  height: 24px;
  border: 2px solid rgba(240, 240, 240, 0.3);
  border-radius: 12px;
  position: relative;
  animation: scroll-bounce 2s ease-in-out infinite;
}

.hero-scroll-icon::after {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 4px;
  height: 6px;
  background: var(--oxgn-surge);
  border-radius: 2px;
}

@keyframes scroll-bounce {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(6px); }
}

/* Pathway Cards */
.pathway-section {
  padding: var(--spacing-2xl) var(--spacing-md);
  max-width: 1200px;
  margin: 0 auto;
}

.pathway-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
}

.pathway-card {
  background: rgba(240, 240, 240, 0.03);
  border: 1px solid rgba(240, 240, 240, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  min-height: var(--touch-target);
  transition: var(--transition);
  cursor: pointer;
}

.pathway-card:hover,
.pathway-card:focus {
  background: rgba(240, 240, 240, 0.06);
  border-color: rgba(106, 205, 210, 0.3);
  transform: translateY(-2px);
  outline: none;
}

.pathway-card:focus-visible {
  outline: 2px solid var(--oxgn-surge);
  outline-offset: 2px;
}

.content-header-back:focus-visible {
  outline: 2px solid var(--oxgn-surge);
  outline-offset: 2px;
}

.tab-btn:focus-visible {
  outline: 2px solid var(--oxgn-surge);
  outline-offset: 2px;
}

.pathway-card.accent-surge { border-left: 4px solid var(--oxgn-surge); }
.pathway-card.accent-lemon { border-left: 4px solid var(--oxgn-lemon); }
.pathway-card.accent-purple { border-left: 4px solid var(--oxgn-purple); }
.pathway-card.accent-light-purple { border-left: 4px solid var(--oxgn-light-purple); }

.pathway-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
}

.pathway-icon.surge { background: rgba(106, 205, 210, 0.2); }
.pathway-icon.lemon { background: rgba(203, 237, 110, 0.2); }
.pathway-icon.purple { background: rgba(94, 60, 160, 0.3); }
.pathway-icon.light-purple { background: rgba(100, 112, 219, 0.2); }

.pathway-content h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--oxgn-white);
  margin-bottom: 4px;
}

.pathway-content p {
  font-size: 0.875rem;
  color: rgba(240, 240, 240, 0.7);
  line-height: 1.4;
}

/* Content View */
.content-view {
  display: none;
  min-height: 100vh;
  flex-direction: column;
}

.content-view.active {
  display: flex;
}

.content-view .hero {
  min-height: auto;
  padding: var(--spacing-xl) var(--spacing-md);
}

.content-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--spacing-sm) var(--spacing-md);
  background: rgba(14, 16, 17, 0.9);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(240, 240, 240, 0.08);
}

.content-header-logo {
  height: 120px;
  width: auto;
}

.content-header-back {
  display: flex;
  align-items: center;
  gap: 6px;
  background: none;
  border: none;
  color: var(--oxgn-surge);
  font-size: 0.875rem;
  font-weight: 600;
  cursor: pointer;
  padding: 8px 0;
  min-height: var(--touch-target);
}

.content-header-back:hover {
  color: var(--oxgn-lemon);
}

.content-body {
  flex: 1;
  padding: var(--spacing-lg) var(--spacing-md) var(--spacing-2xl);
  max-width: 800px;
  margin: 0 auto;
  width: 100%;
}

/* Section styles */
.section-title {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: var(--spacing-md);
  letter-spacing: -0.5px;
}

.section-intro {
  font-size: 1rem;
  font-weight: 300;
  color: rgba(240, 240, 240, 0.85);
  margin-bottom: var(--spacing-lg);
  line-height: 1.7;
}

.content-body h3 {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--oxgn-lemon);
  margin: var(--spacing-lg) 0 var(--spacing-sm);
}

.content-body h4 {
  font-size: 1rem;
  font-weight: 600;
  color: var(--oxgn-surge);
  margin: var(--spacing-md) 0 var(--spacing-xs);
}

.content-body p {
  margin-bottom: var(--spacing-sm);
  color: rgba(240, 240, 240, 0.9);
  font-size: 0.9375rem;
}

/* Highlight Box */
.highlight-box {
  background: var(--gradient-subtle);
  border-left: 4px solid var(--oxgn-surge);
  padding: var(--spacing-md);
  margin: var(--spacing-md) 0;
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.highlight-box.lemon {
  border-left-color: var(--oxgn-lemon);
}

.highlight-box.purple {
  background: rgba(94, 60, 160, 0.15);
  border-left-color: var(--oxgn-purple);
}

.highlight-box h4 {
  margin-top: 0;
  color: var(--oxgn-white);
}

/* Quote Box */
.quote-box {
  background: rgba(94, 60, 160, 0.15);
  border-left: 4px solid var(--oxgn-purple);
  padding: var(--spacing-md) var(--spacing-lg);
  margin: var(--spacing-md) 0;
  font-style: italic;
  font-size: 1rem;
  color: var(--oxgn-white);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.quote-attribution {
  font-style: normal;
  font-size: 0.75rem;
  color: var(--oxgn-light-purple);
  margin-top: var(--spacing-xs);
}

/* Stats Grid */
.stats-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

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

.stat-card {
  background: rgba(240, 240, 240, 0.05);
  border: 1px solid rgba(240, 240, 240, 0.1);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
  text-align: center;
}

.stat-value {
  font-size: 1.75rem;
  font-weight: 800;
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.stat-label {
  font-size: 0.6875rem;
  color: rgba(240, 240, 240, 0.6);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-top: 4px;
}

.stat-card p {
  font-size: 0.75rem;
  margin: 4px 0 0;
  color: rgba(240, 240, 240, 0.7);
}

/* Value Cards */
.value-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
}

.value-card {
  background: rgba(240, 240, 240, 0.03);
  border: 1px solid rgba(240, 240, 240, 0.08);
  border-radius: var(--radius-md);
  padding: var(--spacing-md);
}

.value-card h4 {
  margin: 0 0 var(--spacing-xs);
  color: var(--oxgn-white);
  font-size: 1rem;
}

.value-card p {
  font-size: 0.875rem;
  margin: 0;
  color: rgba(240, 240, 240, 0.7);
}

/* Pillar / Comp item */
.pillar {
  background: rgba(240, 240, 240, 0.03);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-left: 3px solid var(--oxgn-surge);
}

.comp-item {
  background: rgba(240, 240, 240, 0.03);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-sm);
  border-left: 3px solid var(--oxgn-surge);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-sm);
}

.comp-item .comp-text {
  flex: 1;
}

.comp-item .comp-text p {
  margin-top: 4px;
}

.pillar h4,
.comp-item strong {
  color: var(--oxgn-white);
  font-size: 0.9375rem;
  margin-bottom: 4px;
  display: block;
}

.pillar p,
.comp-item p {
  font-size: 0.875rem;
  margin: 0;
}

.comp-icon {
  color: var(--oxgn-lemon);
  flex-shrink: 0;
}

/* Flow diagram */
.flow-diagram {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  margin: var(--spacing-md) 0;
  flex-wrap: wrap;
}

.flow-box {
  background: rgba(240, 240, 240, 0.05);
  border: 1px solid rgba(240, 240, 240, 0.15);
  border-radius: var(--radius-sm);
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: center;
  min-width: 70px;
}

.flow-box.charity {
  border-color: var(--oxgn-purple);
  background: rgba(94, 60, 160, 0.1);
}

.flow-box.artist {
  border-color: var(--oxgn-lemon);
  background: rgba(203, 237, 110, 0.1);
}

.flow-box.fan {
  border-color: var(--oxgn-surge);
  background: rgba(106, 205, 210, 0.1);
}

.flow-box h5 {
  font-size: 0.875rem;
  margin: 0;
  color: var(--oxgn-white);
}

.flow-box p {
  font-size: 0.75rem;
  margin: 4px 0 0;
  color: rgba(240, 240, 240, 0.7);
}

.flow-arrow {
  font-size: 1rem;
  color: var(--oxgn-surge);
}

/* MVV Grid */
.mvv-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-md);
  margin: var(--spacing-md) 0;
}

.mvv-card {
  text-align: center;
  padding: var(--spacing-md);
  background: var(--gradient-subtle);
  border-radius: var(--radius-md);
  border: 1px solid rgba(240, 240, 240, 0.08);
}

.mvv-card h4 {
  color: var(--oxgn-lemon);
  text-transform: uppercase;
  letter-spacing: 2px;
  font-size: 0.75rem;
  margin: 0 0 var(--spacing-sm);
}

.mvv-card p {
  font-size: 0.875rem;
  margin: 0;
  font-weight: 500;
}

/* Tables */
.table-wrapper {
  overflow-x: auto;
  margin: var(--spacing-md) 0;
  -webkit-overflow-scrolling: touch;
}

.content-body table {
  width: 100%;
  min-width: 400px;
  border-collapse: collapse;
  font-size: 0.875rem;
}

.content-body th {
  background: var(--gradient-header);
  color: var(--oxgn-white);
  font-weight: 600;
  text-align: left;
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 2px solid var(--oxgn-surge);
}

.content-body td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid rgba(240, 240, 240, 0.1);
  color: rgba(240, 240, 240, 0.85);
}

.content-body tr:hover td {
  background: rgba(240, 240, 240, 0.03);
}

/* Timeline */
.timeline {
  position: relative;
  margin: var(--spacing-lg) 0;
  padding-left: var(--spacing-lg);
}

.timeline::before {
  content: '';
  position: absolute;
  left: 6px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: var(--gradient);
}

.timeline-item {
  position: relative;
  padding-bottom: var(--spacing-md);
  padding-left: var(--spacing-md);
}

.timeline-item::before {
  content: '';
  position: absolute;
  left: calc(-1 * var(--spacing-lg));
  top: 4px;
  width: 14px;
  height: 14px;
  border-radius: 50%;
  background: var(--oxgn-black);
  border: 3px solid var(--oxgn-surge);
}

.timeline-item.active::before {
  background: var(--oxgn-lemon);
  border-color: var(--oxgn-lemon);
}

.timeline-date {
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--oxgn-surge);
  text-transform: uppercase;
  letter-spacing: 1px;
}

.timeline-title {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--oxgn-white);
  margin: 4px 0;
}

.timeline-desc {
  font-size: 0.8125rem;
  color: rgba(240, 240, 240, 0.7);
  margin: 0;
}

/* Two Column Layout */
.content-body .two-col {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--spacing-lg);
  margin: var(--spacing-md) 0;
}

@media (min-width: 600px) {
  .content-body .two-col {
    grid-template-columns: 1fr 1fr;
  }
}

.content-body .two-col h4 {
  margin-bottom: var(--spacing-xs);
}

.content-body .two-col ul {
  margin: 0;
  padding-left: var(--spacing-lg);
}

/* Lists */
.content-body ul {
  padding-left: var(--spacing-lg);
  margin: var(--spacing-sm) 0;
}

.content-body li {
  margin-bottom: 6px;
  color: rgba(240, 240, 240, 0.85);
  font-size: 0.9375rem;
}

.content-body li::marker {
  color: var(--oxgn-surge);
}

/* Collapsible Section */
.collapsible-section {
  margin-bottom: var(--spacing-md);
}

.collapsible-section summary {
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--oxgn-lemon);
  cursor: pointer;
  padding: var(--spacing-sm) 0;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.collapsible-section summary::-webkit-details-marker {
  display: none;
}

.collapsible-section summary::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--oxgn-surge);
  transition: transform var(--transition);
}

.collapsible-section[open] summary::after {
  content: '−';
}

.collapsible-section .collapsible-content {
  padding-top: var(--spacing-sm);
}

/* Bottom Tab Bar (Mobile) */
.tab-bar {
  position: fixed;
  bottom: 0;
  left: 0;
  right: 0;
  display: flex;
  justify-content: space-around;
  padding: var(--spacing-xs) var(--spacing-sm);
  padding-bottom: calc(var(--spacing-xs) + env(safe-area-inset-bottom));
  background: rgba(14, 16, 17, 0.95);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-top: 1px solid rgba(240, 240, 240, 0.08);
  z-index: 90;
}

.tab-bar .tab-btn {
  flex: 1;
  max-width: 80px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  padding: var(--spacing-xs);
  background: none;
  border: none;
  color: rgba(240, 240, 240, 0.6);
  font-size: 0.625rem;
  cursor: pointer;
  min-height: var(--touch-target);
}

.tab-btn:hover {
  color: rgba(240, 240, 240, 0.9);
}

.tab-btn.active {
  color: var(--oxgn-surge);
}

.tab-btn-icon {
  font-size: 1.25rem;
}

/* Content padding for tab bar */
.content-view .content-body {
  padding-bottom: calc(var(--spacing-2xl) + 60px);
}

/* Screen States */
.home-view .pathway-section {
  display: block;
}

body:not(.content-mode) .tab-bar {
  display: none;
}

body.content-mode .tab-bar {
  display: flex;
}

.content-view .pathway-section {
  display: none;
}

body:not(.content-mode) .content-view {
  display: none !important;
}

/* Responsive */
@media (min-width: 480px) {
  .pathway-grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

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

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

@media (min-width: 768px) {
  .hero-tagline {
    font-size: 1.5rem;
  }

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

  .pathway-card {
    flex-direction: column;
    text-align: center;
    padding: var(--spacing-xl);
  }

  .pathway-icon {
    margin: 0 auto;
  }

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

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

  .section-title {
    font-size: 2rem;
  }
}

@media (min-width: 1024px) {
  .tab-bar {
    display: none;
  }

  .content-view .content-body {
    padding-bottom: var(--spacing-2xl);
  }
}

/* Fade-in animation */
@keyframes fadeIn {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

.content-body > section {
  animation: fadeIn 0.4s ease-out;
}

@media (prefers-reduced-motion: reduce) {
  .content-body > section {
    animation: none;
  }
  .hero-scroll-icon {
    animation: none;
  }
}