/* ==========================================================================
   THE CITADEL DESIGN SYSTEM & STYLING
   ========================================================================== */

/* 1. Global Custom Properties */
:root {
  --font-title: 'Cinzel', serif;
  --font-body: 'Outfit', sans-serif;

  /* Cyber Theme Colors */
  --bg-dark: #07070b;
  --bg-card: rgba(10, 10, 18, 0.65);
  --border-light: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 240, 255, 0.2);
  
  --text-primary: #ffffff;
  --text-muted: #9fa0a6;
  --text-dim: #5c5d63;

  /* Accent Colors (Neon) */
  --color-cyan: #00f0ff;
  --color-cyan-glow: rgba(0, 240, 255, 0.5);
  
  --color-red: #ff0055;
  --color-red-glow: rgba(255, 0, 85, 0.5);
  --color-red-dim: rgba(255, 0, 85, 0.1);
  
  --color-blue: #0088ff;
  --color-blue-glow: rgba(0, 136, 255, 0.5);
  --color-blue-dim: rgba(0, 136, 255, 0.1);
  
  --color-green: #39ff14;
  --color-green-glow: rgba(57, 255, 20, 0.5);
  --color-green-dim: rgba(57, 255, 20, 0.1);
}

/* 2. Reset & Base Setup */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body, html {
  width: 100%;
  height: 100%;
  background-color: var(--bg-dark);
  color: var(--text-primary);
  font-family: var(--font-body);
  overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-dark);
}
::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.15);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan);
}

/* 3. Helper Classes & Layout Utilities */
.flex-center {
  display: flex;
  justify-content: center;
  align-items: center;
}

.flex-column {
  flex-direction: column;
}

.hidden {
  display: none !important;
}

.uppercase {
  text-transform: uppercase;
}

.tracking-widest {
  letter-spacing: 0.25em;
}

/* Text Glows */
.text-glow {
  text-shadow: 0 0 10px var(--color-cyan-glow);
}
.text-glow-red {
  text-shadow: 0 0 10px var(--color-red-glow);
}
.text-glow-blue {
  text-shadow: 0 0 10px var(--color-blue-glow);
}
.text-glow-green {
  text-shadow: 0 0 10px var(--color-green-glow);
}

.accent-text {
  color: var(--color-cyan);
  text-shadow: 0 0 8px var(--color-cyan-glow);
}

/* 4. Canvas Styling */
#webgl-canvas {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 1;
  pointer-events: none; /* allow scroll fall-through; raycast via window listeners */
  transition: filter 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
}

#webgl-canvas.blurred {
  filter: blur(8px) brightness(0.5);
}

/* 5. App Container & Layout (Over WebGL) */
#app-container {
  position: relative;
  z-index: 2;
  width: 100%;
  pointer-events: none; /* Let clicks pass through empty spaces to Canvas */
}

/* Header & Navigation */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  padding: 1.5rem 2rem;
  z-index: 10;
  background: linear-gradient(to bottom, rgba(7, 7, 11, 0.8) 0%, rgba(7, 7, 11, 0) 100%);
  backdrop-filter: blur(4px);
  pointer-events: auto; /* Active links */
}

.nav-container {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  font-size: 1.5rem;
  font-weight: 900;
  text-decoration: none;
  color: var(--text-primary);
  letter-spacing: 2px;
}

.header-logo-img {
  height: 38px;
  width: 38px;
  border-radius: 50%;
  border: 1.5px solid rgba(255, 255, 255, 0.25);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.2);
  object-fit: cover;
  transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), border-color 0.3s ease, box-shadow 0.3s ease;
}

.logo:hover .header-logo-img {
  transform: scale(1.08) rotate(5deg);
  border-color: var(--color-cyan);
  box-shadow: 0 0 15px var(--color-cyan-glow);
}

.nav-links {
  display: flex;
  gap: 2.5rem;
}

.nav-link {
  color: var(--text-muted);
  text-decoration: none;
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 1px;
  text-transform: uppercase;
  transition: color 0.3s ease, text-shadow 0.3s ease;
  position: relative;
}

.nav-link:hover, .nav-link.active {
  color: var(--text-primary);
  text-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-cyan);
  box-shadow: 0 0 8px var(--color-cyan);
  transition: width 0.3s ease;
}

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

.nav-actions {
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

/* System Status Badge */
.system-status-badge {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 800;
  border: 1px solid rgba(255, 255, 255, 0.1);
  padding: 0.4rem 0.8rem;
  border-radius: 50px;
  background: rgba(255, 255, 255, 0.02);
}

.status-dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
}

.green-pulse {
  background-color: var(--color-green);
  box-shadow: 0 0 8px var(--color-green);
  animation: pulse 2s infinite;
}

@keyframes pulse {
  0% { transform: scale(0.9); opacity: 0.6; }
  50% { transform: scale(1.15); opacity: 1; box-shadow: 0 0 12px var(--color-green); }
  100% { transform: scale(0.9); opacity: 0.6; }
}

/* Buttons */
.btn {
  background: transparent;
  border: 1px solid var(--text-muted);
  color: var(--text-primary);
  padding: 0.7rem 1.5rem;
  font-size: 0.85rem;
  font-weight: 600;
  letter-spacing: 2px;
  border-radius: 4px;
  cursor: pointer;
  text-transform: uppercase;
  transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  text-decoration: none;
  display: inline-block;
  text-align: center;
}

.btn:hover {
  background: var(--text-primary);
  color: var(--bg-dark);
  box-shadow: 0 0 15px rgba(255, 255, 255, 0.5);
  transform: translateY(-2px);
}

.btn-primary {
  background: linear-gradient(135deg, rgba(0, 240, 255, 0.2) 0%, rgba(0, 136, 255, 0.2) 100%);
  border: 1px solid var(--color-cyan);
  color: var(--color-cyan);
  text-shadow: 0 0 5px var(--color-cyan-glow);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.1);
}

.btn-primary:hover {
  background: var(--color-cyan);
  color: var(--bg-dark);
  text-shadow: none;
  box-shadow: 0 0 20px var(--color-cyan-glow);
  border-color: var(--color-cyan);
}

.btn-secondary {
  border: 1px solid rgba(255, 255, 255, 0.15);
  background: rgba(255, 255, 255, 0.03);
}

.btn-secondary:hover {
  border-color: var(--text-primary);
  background: rgba(255, 255, 255, 0.1);
  color: var(--text-primary);
}

.btn-red {
  border: 1px solid var(--color-red);
  color: var(--color-red);
  background: rgba(255, 0, 85, 0.05);
}
.btn-red:hover {
  background: var(--color-red);
  color: var(--text-primary);
  box-shadow: 0 0 20px var(--color-red-glow);
}

.btn-blue {
  border: 1px solid var(--color-blue);
  color: var(--color-blue);
  background: rgba(0, 136, 255, 0.05);
}
.btn-blue:hover {
  background: var(--color-blue);
  color: var(--text-primary);
  box-shadow: 0 0 20px var(--color-blue-glow);
}

.btn-green {
  border: 1px solid var(--color-green);
  color: var(--color-green);
  background: rgba(57, 255, 20, 0.05);
}
.btn-green:hover {
  background: var(--color-green);
  color: var(--bg-dark);
  box-shadow: 0 0 20px var(--color-green-glow);
}

.btn-block {
  width: 100%;
  padding: 0.9rem 1.5rem;
}

/* 6. Scroll Sections Container */
#scroll-container {
  width: 100%;
}

.scroll-section {
  min-height: 100vh;
  width: 100%;
  position: relative;
  display: flex;
  align-items: center;
  padding: 0 10%;
}

/* Hero Section */
.hero-section {
  flex-direction: column;
  justify-content: center;
  align-items: flex-start;
  padding-top: 15vh;
}

.hero-content {
  max-width: 650px;
  pointer-events: auto;
}

.hero-tagline {
  font-size: 0.9rem;
  color: var(--color-cyan);
  margin-bottom: 1rem;
  font-weight: 800;
}

.hero-title {
  font-size: clamp(3.5rem, 8vw, 6rem);
  font-weight: 900;
  line-height: 1.05;
  margin-bottom: 1.5rem;
  letter-spacing: -2px;
  background: linear-gradient(to bottom, #ffffff, #888888);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-desc {
  font-size: 1.1rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 2.5rem;
  font-weight: 300;
}

.hero-buttons {
  display: flex;
  gap: 1.5rem;
}

.scroll-indicator {
  position: absolute;
  bottom: 5vh;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-dim);
  letter-spacing: 2px;
  text-decoration: none;
  pointer-events: auto;
  transition: color 0.3s ease, transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.scroll-indicator:hover {
  color: var(--color-cyan);
  text-shadow: 0 0 8px var(--color-cyan-glow);
  transform: translateX(-50%) translateY(-5px);
}

.mouse {
  width: 22px;
  height: 38px;
  border: 2px solid var(--text-dim);
  border-radius: 12px;
  position: relative;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.scroll-indicator:hover .mouse {
  border-color: var(--color-cyan);
  box-shadow: 0 0 10px var(--color-cyan-glow);
}

.wheel {
  width: 4px;
  height: 8px;
  background-color: var(--text-dim);
  border-radius: 2px;
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  animation: scrollWheel 1.5s infinite;
  transition: background-color 0.3s ease;
}

.scroll-indicator:hover .wheel {
  background-color: var(--color-cyan);
}

@keyframes scrollWheel {
  0% { opacity: 1; transform: translate3d(-50%, 0, 0); }
  100% { opacity: 0; transform: translate3d(-50%, 15px, 0); }
}

/* Zone Section Cards */
.zone-section {
  display: flex;
  justify-content: flex-start;
}

.zone-section:nth-of-type(even) {
  justify-content: flex-end;
}

/* Glassmorphism Cards */
.glass-card {
  background: var(--bg-card);
  border: 1px solid var(--border-light);
  backdrop-filter: blur(16px) saturate(180%);
  -webkit-backdrop-filter: blur(16px) saturate(180%);
  border-radius: 12px;
  box-shadow: 0 15px 35px rgba(0, 0, 0, 0.4);
  pointer-events: auto; /* Interactive card */
  transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease;
}

.zone-card {
  width: 100%;
  max-width: 480px;
  padding: 2.5rem;
}

.zone-card:hover {
  transform: translateY(-5px);
  border-color: rgba(255, 255, 255, 0.15);
}

.zone-badge {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 800;
  padding: 0.4rem 0.8rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  border: 1px solid transparent;
}

.zone-title {
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1.5rem;
  letter-spacing: 1px;
}

.zone-specs {
  list-style: none;
  margin-top: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
  color: var(--text-muted);
}

.zone-specs li {
  display: flex;
  align-items: center;
  gap: 0.8rem;
  font-size: 0.95rem;
}

.zone-specs li svg {
  width: 18px;
  height: 18px;
  opacity: 0.8;
}

#card-techx:hover {
  box-shadow: 0 15px 35px rgba(255, 0, 85, 0.1);
  border-color: rgba(255, 0, 85, 0.3);
}
#card-techx .zone-specs li svg { color: var(--color-red); }

#card-invenio:hover {
  box-shadow: 0 15px 35px rgba(0, 136, 255, 0.1);
  border-color: rgba(0, 136, 255, 0.3);
}
#card-invenio .zone-specs li svg { color: var(--color-blue); }

#card-roboclash:hover {
  box-shadow: 0 15px 35px rgba(57, 255, 20, 0.1);
  border-color: rgba(57, 255, 20, 0.3);
}
#card-roboclash .zone-specs li svg { color: var(--color-green); }

.card-footer {
  margin-top: 2rem;
}

/* Footer Section */
.footer {
  min-height: 40vh;
  border-top: 1px solid var(--border-light);
  background: linear-gradient(to top, rgba(7, 7, 11, 0.95) 0%, rgba(7, 7, 11, 0.5) 100%);
  backdrop-filter: blur(12px);
  justify-content: center;
  align-items: center;
  pointer-events: auto;
}

.footer-content {
  text-align: center;
  max-width: 600px;
}

.footer-logo {
  font-size: 1.8rem;
  font-weight: 900;
  letter-spacing: 2px;
  margin-bottom: 1rem;
}

.footer-credit {
  color: var(--text-dim);
  font-size: 0.85rem;
  line-height: 1.6;
  margin-bottom: 1.5rem;
}

.footer-socials {
  display: flex;
  justify-content: center;
  gap: 1.5rem;
}

.social-icon {
  color: var(--text-muted);
  transition: color 0.3s ease, transform 0.3s ease;
}

.social-icon:hover {
  color: var(--color-cyan);
  transform: translateY(-3px);
}

/* 8. Registration Modal */
#modal-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100vw;
  height: 100vh;
  z-index: 100;
  transition: opacity 0.4s ease;
}

.modal-backdrop {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(4, 4, 6, 0.75);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.modal-card {
  position: relative;
  width: 90%;
  max-width: 500px;
  padding: 3rem;
  border-color: var(--border-glow);
  box-shadow: 0 0 50px rgba(0, 240, 255, 0.15);
  max-height: 90vh;
  overflow-y: auto;
}

.modal-close-btn {
  position: absolute;
  top: 1.5rem;
  right: 1.5rem;
  background: transparent;
  border: none;
  color: var(--text-muted);
  cursor: pointer;
  transition: color 0.3s, transform 0.3s;
}

.modal-close-btn:hover {
  color: var(--color-cyan);
  transform: rotate(90deg);
}

.modal-header {
  margin-bottom: 2rem;
}

.modal-subtitle {
  font-size: 0.7rem;
  font-weight: 800;
  color: var(--text-muted);
  margin-bottom: 0.5rem;
}

.modal-title {
  font-size: 1.8rem;
  font-weight: 800;
  color: var(--text-primary);
}

/* Form Styles */
.modal-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  text-align: left;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
}

.form-group label {
  font-size: 0.7rem;
  font-weight: 800;
  letter-spacing: 1px;
  color: var(--text-muted);
}

.form-group input, .form-group select {
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-light);
  border-radius: 4px;
  padding: 0.8rem 1rem;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  transition: border-color 0.3s, box-shadow 0.3s, background 0.3s;
  width: 100%;
}

.form-group input:focus, .form-group select:focus {
  outline: none;
  border-color: var(--color-cyan);
  box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
  background: rgba(255, 255, 255, 0.06);
}

.form-group select option {
  background-color: var(--bg-dark);
  color: var(--text-primary);
}

/* Modal Form Submit State */
.btn-submit {
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 0.8rem;
}

/* Success View */
#modal-success-screen {
  padding: 2rem 0;
  text-align: center;
}

.success-icon-wrapper {
  width: 70px;
  height: 70px;
  border-radius: 50%;
  border: 2px solid var(--color-green);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 2rem;
  box-shadow: 0 0 20px var(--color-green-dim);
}

.success-icon-wrapper svg {
  width: 32px;
  height: 32px;
}

.success-title {
  font-size: 1.5rem;
  margin-bottom: 1rem;
}

.success-message {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.6;
  margin-bottom: 2rem;
}

/* Toast Notification */
#toast-container {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 999;
  display: flex;
  flex-direction: column;
  gap: 0.8rem;
}

.toast {
  background: rgba(10, 10, 15, 0.9);
  border: 1px solid var(--border-glow);
  backdrop-filter: blur(8px);
  padding: 1rem 1.5rem;
  border-radius: 4px;
  box-shadow: 0 5px 15px rgba(0,0,0,0.3);
  display: flex;
  align-items: center;
  gap: 1rem;
  color: var(--text-primary);
  font-size: 0.9rem;
  animation: slideIn 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
  pointer-events: auto;
}

@keyframes slideIn {
  from { transform: translateX(100%); opacity: 0; }
  to { transform: translateX(0); opacity: 1; }
}

.toast.toast-success {
  border-color: var(--color-green);
  box-shadow: 0 0 15px var(--color-green-dim);
}

.toast.toast-success svg {
  color: var(--color-green);
}

/* Animations */
.animate-scale-up {
  animation: scaleUp 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes scaleUp {
  from { transform: scale(0.9); opacity: 0; }
  to { transform: scale(1); opacity: 1; }
}

.loader-spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: currentColor;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ==========================================================================
   9. HARDWARE FALLBACK & LOW-TIER DEVICE STYLING (Gating System)
   ========================================================================== */

/* Low-tier specific layout */
html.low-tier #webgl-canvas {
  display: none !important;
}

html.low-tier body {
  /* Dynamic procedural cyberpunk mesh animation via CSS */
  background: radial-gradient(circle at 10% 20%, rgba(15, 10, 25, 1) 0%, rgba(5, 5, 8, 1) 90.2%);
  background-attachment: fixed;
}

html.low-tier #app-container,
html.low-tier #scroll-container {
  pointer-events: auto; /* Enable regular scrolling & clicks everywhere */
}

/* Low tier styling tweaks: cards are displayed centered and fully transparent, bypassing WebGL coordinate positioning */
html.low-tier .scroll-section {
  display: flex;
  justify-content: center;
  align-items: center;
  padding: 8vh 1rem;
  min-height: auto;
}

html.low-tier .hero-section {
  padding-top: 18vh;
  min-height: 80vh;
  justify-content: center;
  align-items: center;
  text-align: center;
}

html.low-tier .hero-content {
  align-items: center;
  display: flex;
  flex-direction: column;
}

html.low-tier .hero-buttons {
  justify-content: center;
}

html.low-tier .zone-card {
  max-width: 600px;
  background: rgba(14, 14, 25, 0.85);
  box-shadow: 0 10px 30px rgba(0,0,0,0.5);
  border-color: rgba(255, 255, 255, 0.05);
}

html.low-tier #card-techx { border-left: 4px solid var(--color-red); }
html.low-tier #card-invenio { border-right: 4px solid var(--color-blue); }
html.low-tier #card-roboclash { border-left: 4px solid var(--color-green); }

/* Remove pointer-events tricks in low-tier */
html.low-tier .header {
  pointer-events: auto;
  background: rgba(7, 7, 11, 0.95);
  border-bottom: 1px solid var(--border-light);
}

@media (max-width: 1024px) {
  .header {
    padding: 0.75rem 1.25rem;
  }

  .nav-container {
    display: grid;
    grid-template-columns: auto auto;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    row-gap: 0.75rem;
  }

  .nav-links {
    grid-column: span 2;
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    overflow-x: auto;
    white-space: nowrap;
    width: 100%;
    padding: 0.25rem 0;
    -webkit-overflow-scrolling: touch;
  }
  
  .nav-links::-webkit-scrollbar {
    display: none;
  }

  .nav-link {
    font-size: 0.8rem;
    letter-spacing: 0.5px;
  }

  /* Hide Home and Contact Us links on mobile header to focus on About & Events */
  .nav-links a[href="#hero"],
  .nav-links a[href*="mailto"] {
    display: none;
  }
  
  .scroll-section {
    padding: 0 5%;
  }

  .zone-card {
    max-width: 500px;
  }
}


@media (max-width: 640px) {
  .header {
    padding: 1rem;
  }
  
  .system-status-badge {
    display: none; /* Save space on small mobiles */
  }

  .scroll-indicator {
    display: none; /* Hide scroll indicator on mobile */
  }

  .hero-buttons {
    flex-direction: column;
    width: 100%;
    gap: 0.8rem;
  }

  .hero-buttons .btn {
    width: 100%;
  }

  .hero-title {
    font-size: 3rem;
  }

  .zone-card {
    padding: 1.5rem;
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  .modal-card {
    padding: 1.5rem;
  }
}

/* Fix excessive vertical spacing on mobile desktop site / portrait viewports / touchscreen devices */
@media (orientation: portrait), (pointer: coarse) {
  .scroll-section {
    min-height: clamp(500px, 80vh, 850px);
  }
  .hero-section {
    padding-top: 10vh;
  }
}

@media (pointer: coarse) {
  .scroll-indicator {
    display: none !important;
  }
}