/* Kipod AI Labs — dark + subtle red neon */
:root{
  --bg: #0a0a0a;
  --bg-elev: #0f0f10;
  --neon: #ff1a3d;         /* core neon red */
  --neon-soft: rgba(255, 26, 61, 0.6);
  --neon-dim: rgba(255, 26, 61, 0.85);
  --muted: rgba(255, 190, 200, 0.8); /* used sparingly */
  --ring: rgba(255, 26, 61, 0.35);
  --maxw: 980px;
}

*{box-sizing:border-box}
html{scroll-behavior:smooth}
body{
  margin:0;
  font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Helvetica, Arial, "Noto Sans", sans-serif;
  background: var(--bg);
  color: var(--neon-dim);
  line-height:1.6;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container{
  width: 100%;
  max-width: var(--maxw);
  margin: 0 auto;
  padding: 0 20px;
}

.skip-link{
  position:absolute; left:-999px; top:auto; width:1px; height:1px; overflow:hidden;
}
.skip-link:focus{ position:static; width:auto; height:auto; padding:8px 12px; background:#111; color:var(--neon); }

/* Header */
.site-header{
  position: sticky;
  top:0;
  z-index: 100;
  background: linear-gradient(180deg, rgba(0,0,0,0.85), rgba(0,0,0,0.5));
  backdrop-filter: blur(4px);
  border-bottom: 1px solid rgba(255,26,61,0.12);
}
.header-inner{ display:flex; align-items:center; justify-content:space-between; height:64px; }

.brand{ 
  text-decoration:none; 
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand-icon-container{
  height: 24px !important;
  width: 24px !important;
  overflow: hidden !important;
  flex-shrink: 0 !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
}
.brand-icon{
  height: 24px !important;
  width: 24px !important;
  min-height: 24px !important;
  min-width: 24px !important;
  max-width: 24px !important;
  max-height: 24px !important;
  object-fit: contain !important;
  flex-shrink: 0 !important;
  display: block !important;
  box-sizing: border-box !important;
}
.brand-text{
  font-weight:700; 
  letter-spacing:0.02em;
  color: var(--neon);
  filter: drop-shadow(0 0 0.35rem var(--neon-soft));
}


/* Nav */
.nav{ display:flex; gap: 18px; }
.nav-link{
  color: var(--neon-dim);
  text-decoration: none;
  font-weight: 600;
  padding: 8px 10px;
  border-radius: 8px;
  border: 1px solid transparent;
}
.nav-link:focus, .nav-link:hover{ border-color: var(--ring); outline: none; box-shadow: 0 0 0 4px var(--ring); }

/* Mobile menu */
.mobile-menu-btn{
  display: none;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 32px;
  height: 32px;
  background: none;
  border: 1px solid rgba(255,26,61,0.3);
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.2s ease;
}
.mobile-menu-btn:hover, .mobile-menu-btn:focus{
  border-color: var(--neon);
  box-shadow: 0 0 0 3px var(--ring);
  outline: none;
}
.hamburger-line{
  width: 18px;
  height: 2px;
  background: var(--neon-dim);
  margin: 2px 0;
  transition: all 0.3s ease;
  border-radius: 1px;
}
.mobile-menu-btn:hover .hamburger-line{
  background: var(--neon);
  box-shadow: 0 0 4px var(--neon-soft);
}
.mobile-menu-btn.active .hamburger-line:nth-child(1){
  transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.active .hamburger-line:nth-child(2){
  opacity: 0;
}
.mobile-menu-btn.active .hamburger-line:nth-child(3){
  transform: rotate(-45deg) translate(7px, -6px);
}

.mobile-menu-overlay{
  display: none;
  position: fixed;
  top: 64px;
  left: 0;
  width: 100%;
  height: calc(100vh - 64px);
  background: rgba(0,0,0,0.95);
  backdrop-filter: blur(8px);
  z-index: 99;
}
.mobile-menu-overlay.active{
  display: block;
}
.mobile-nav{
  display: flex;
  flex-direction: column;
  padding: 32px 20px;
  gap: 20px;
}
.mobile-nav-link{
  color: var(--neon-dim);
  text-decoration: none;
  font-weight: 600;
  font-size: 18px;
  padding: 16px 20px;
  border-radius: 12px;
  border: 1px solid transparent;
  text-align: center;
  transition: all 0.2s ease;
}
.mobile-nav-link:hover, .mobile-nav-link:focus{
  border-color: var(--neon);
  box-shadow: 0 0 0 4px var(--ring), 0 0 16px var(--neon-soft);
  outline: none;
  background: rgba(255,26,61,0.05);
}

/* Lab Intro Video */
.lab-intro-section{
  padding: 0;
  background: linear-gradient(180deg, rgba(255,26,61,0.02), transparent 50%, rgba(255,26,61,0.02));
  position: relative;
}
.video-container{
  position: relative;
  max-width: 1200px;
  margin: 0 auto;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 0 40px rgba(255,26,61,0.2), 0 0 80px rgba(255,26,61,0.1);
  border: 2px solid rgba(255,26,61,0.3);
}
.video-wrapper{
  position: relative;
  width: 100%;
  background: var(--bg);
  display: flex;
  align-items: center;
  justify-content: center;
}
.lab-intro-video{
  width: 100%;
  height: auto;
  display: block;
  filter: contrast(1.1) brightness(0.9);
  border-radius: 16px;
}
.video-overlay{
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(
    45deg, 
    rgba(0,0,0,0.7) 0%, 
    rgba(0,0,0,0.3) 30%, 
    transparent 60%,
    rgba(255,26,61,0.1) 100%
  );
  display: flex;
  align-items: flex-end;
  padding: 40px;
  pointer-events: none;
}
.video-content{
  max-width: 500px;
}
.video-title{
  font-size: clamp(24px, 4vw, 36px);
  margin: 0 0 12px 0;
  text-shadow: 0 0 8px rgba(0,0,0,0.8), 0 0 20px var(--neon-soft);
}
.video-subtitle{
  font-size: clamp(14px, 2.5vw, 18px);
  margin: 0;
  font-weight: 500;
  text-shadow: 0 0 6px rgba(0,0,0,0.8);
  opacity: 0.9;
}
.video-fallback{
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  text-align: center;
  max-width: 300px;
}

/* Video responsive */
@media (max-width: 768px){
  .video-container{
    border-radius: 16px;
    margin: 0 20px;
    max-width: 600px;
  }
  .video-overlay{
    padding: 24px;
    background: linear-gradient(
      0deg, 
      rgba(0,0,0,0.8) 0%, 
      rgba(0,0,0,0.4) 40%, 
      transparent 70%
    );
  }
  .lab-intro-video{
    border-radius: 12px;
  }
}

@media (max-width: 480px){
  .video-container{
    border-radius: 12px;
    margin: 0 16px;
    max-width: 400px;
  }
  .video-overlay{
    padding: 20px;
  }
  .lab-intro-video{
    border-radius: 8px;
  }
}

/* Sections */
.section{ padding: 64px 0; }
.section-title{
  margin: 0 0 12px 0;
  font-size: clamp(24px, 4vw, 32px);
}
.body-text{ margin: 12px 0; }
.list{ margin: 16px 0; padding-left: 20px; }
.list li{ margin: 10px 0; }
.list-title{ font-weight:700; }

/* Hero */
.hero{ padding: 88px 0 56px; background: radial-gradient(60% 50% at 50% 0%, rgba(255,26,61,0.12), transparent 60%); }
.hero-title{
  margin: 0 0 12px 0;
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.hero-subtitle{
  font-size: clamp(20px, 4vw, 32px);
  font-weight: 600;
  opacity: 0.85;
  letter-spacing: 0.02em;
}
.hero-main{
  font-size: clamp(32px, 7vw, 56px);
  font-weight: 700;
  letter-spacing: -0.01em;
}
.hero-sub{ font-size: clamp(16px, 3.2vw, 18px); max-width: 760px; }
.hero-cta{ margin-top: 20px; }

/* Buttons */
.btn{
  display:inline-block;
  padding: 12px 18px;
  border-radius: 999px;
  border: 1px solid var(--neon);
  color: var(--neon);
  text-decoration: none;
  font-weight: 700;
  letter-spacing: 0.02em;
  transition: transform .08s ease, box-shadow .2s ease;
  box-shadow: 0 0 14px rgba(255,26,61,0.18), inset 0 0 10px rgba(255,26,61,0.15);
}
.btn:active{ transform: translateY(1px); }
.btn:focus,.btn:hover{ outline:none; box-shadow: 0 0 0 6px var(--ring), 0 0 18px rgba(255,26,61,0.28); }

/* Donation */
.donation-content{
  display: flex;
  align-items: center;
  gap: 32px;
  margin-top: 24px;
}
.qr-container{
  flex-shrink: 0;
}
.bitcoin-qr{
  width: 200px;
  height: 200px;
  border-radius: 12px;
  background: var(--bg-elev);
  padding: 12px;
  box-shadow: 0 0 20px var(--neon-soft), 0 0 40px rgba(255,26,61,0.15);
  border: 2px solid var(--neon);
}
.donation-details{
  flex: 1;
}
.bitcoin-address{
  display: block;
  background: var(--bg-elev);
  padding: 12px 16px;
  border-radius: 8px;
  border: 1px solid rgba(255,26,61,0.25);
  color: var(--neon-dim);
  font-family: 'Courier New', Courier, monospace;
  font-size: 14px;
  word-break: break-all;
  margin: 8px 0 16px 0;
  cursor: pointer;
  transition: all 0.2s ease;
}
.bitcoin-address:hover{
  border-color: var(--neon);
  box-shadow: 0 0 0 4px var(--ring);
}
.small{ font-size: 14px; opacity: 0.8; }

/* Responsive donation layout */
@media (max-width: 640px){
  .donation-content{
    flex-direction: column;
    align-items: center;
    text-align: center;
    gap: 24px;
    margin-top: 20px;
  }
  .qr-container{
    width: 100%;
    display: flex;
    justify-content: center;
  }
  .bitcoin-qr{
    width: 140px;
    height: 140px;
    padding: 8px;
  }
  .donation-details{
    width: 100%;
    max-width: 320px;
  }
  .bitcoin-address{
    font-size: 12px;
    padding: 10px 12px;
    line-height: 1.4;
  }
  .small{
    font-size: 13px;
    margin-top: 12px;
  }
}

/* Extra small mobile navigation */
@media (max-width: 480px){
  .nav{ gap: 4px; }
  .nav-link{
    font-size: 13px;
    padding: 5px 6px;
  }
}

/* Extra small mobile screens - donation */
@media (max-width: 480px){
  .bitcoin-qr{
    width: 120px;
    height: 120px;
    padding: 6px;
  }
  .donation-details{
    max-width: 280px;
    padding: 0 10px;
  }
  .bitcoin-address{
    font-size: 11px;
    padding: 8px 10px;
  }
}

/* Contact */
.section-contact{
  border-top: 1px dashed rgba(255,26,61,0.18);
  background: radial-gradient(50% 50% at 50% 100%, rgba(255,26,61,0.08), transparent 70%);
}
.contact-content{
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}
.contact-header{
  margin-bottom: 40px;
}
.contact-subtitle{
  font-size: clamp(16px, 3vw, 20px);
  font-weight: 600;
  margin: 12px 0 20px 0;
}
.contact-methods{
  margin: 32px 0;
}
.contact-text-simple{
  font-size: 16px;
  font-weight: 500;
  margin: 12px 0;
  opacity: 0.8;
  letter-spacing: 0.02em;
}
.contact-link-simple{
  color: var(--neon-dim);
  text-decoration: none;
  transition: all 0.2s ease;
}
.contact-link-simple:hover, .contact-link-simple:focus{
  color: var(--neon);
  text-shadow: 0 0 4px var(--neon-soft);
  outline: none;
}
.contact-world{
  font-size: 16px;
  font-weight: 500;
  margin: 16px 0 0 0;
  opacity: 0.9;
  letter-spacing: 0.02em;
}
.contact-cta{
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,26,61,0.15);
}

/* Contact responsive */
@media (max-width: 640px){
  .contact-text-simple{
    font-size: 15px;
    margin: 10px 0;
  }
}

/* Footer */
.site-footer{
  padding: 28px 0 48px;
  border-top: 1px solid rgba(255,26,61,0.12);
  color: var(--neon-dim);
  font-size: 14px;
}

/* Neon effects */
.neon-strong{ text-shadow: 0 0 6px var(--neon-soft), 0 0 16px rgba(255,26,61,0.28); }
.neon-subtle{ text-shadow: 0 0 4px rgba(255,26,61,0.18); }

/* Responsive tweaks */
@media (max-width: 640px){
  .header-inner{ height: 58px; }
  .nav{ display: none; }
  .mobile-menu-btn{ display: flex; }
  .mobile-menu-overlay{ top: 58px; height: calc(100vh - 58px); }
  .section{ padding: 56px 0; }
  .brand-icon-container{
    height: 20px !important;
    width: 20px !important;
  }
  .brand-icon{ 
    height: 20px !important; 
    width: 20px !important; 
    min-height: 20px !important;
    min-width: 20px !important;
    max-width: 20px !important;
    max-height: 20px !important;
    object-fit: contain !important;
  }
}

/* 2048 Game Section */
.game-section{
  background: radial-gradient(50% 50% at 50% 50%, rgba(255,26,61,0.05), transparent 70%);
  border-top: 1px dashed rgba(255,26,61,0.18);
}
.game-subtitle{
  font-size: clamp(16px, 3vw, 18px);
  font-weight: 500;
  margin: 12px 0 32px 0;
  text-align: center;
  opacity: 0.8;
}
.game-subtitle-left{
  text-align: left;
}
.game-container{
  max-width: 500px;
  margin: 0 auto;
  text-align: center;
}
.game-board{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  grid-template-rows: repeat(4, 1fr);
  gap: 8px;
  background: var(--bg-elev);
  padding: 12px;
  border-radius: 12px;
  border: 2px solid rgba(255,26,61,0.3);
  box-shadow: 0 0 20px rgba(255,26,61,0.15);
  margin-bottom: 24px;
  aspect-ratio: 1;
}
.game-tile{
  background: var(--bg);
  border-radius: 6px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: clamp(16px, 3vw, 24px);
  transition: all 0.15s ease;
  border: 1px solid rgba(255,26,61,0.2);
  position: relative;
}
.game-tile.tile-2{ background: rgba(255,26,61,0.1); color: var(--neon-dim); }
.game-tile.tile-4{ background: rgba(255,26,61,0.15); color: var(--neon-dim); }
.game-tile.tile-8{ background: rgba(255,26,61,0.25); color: var(--neon); }
.game-tile.tile-16{ background: rgba(255,26,61,0.35); color: var(--neon); }
.game-tile.tile-32{ background: rgba(255,26,61,0.45); color: var(--neon); }
.game-tile.tile-64{ background: rgba(255,26,61,0.55); color: var(--neon); }
.game-tile.tile-128{ background: rgba(255,26,61,0.65); color: var(--neon); font-size: clamp(14px, 2.5vw, 20px); }
.game-tile.tile-256{ background: rgba(255,26,61,0.75); color: var(--neon); font-size: clamp(14px, 2.5vw, 20px); }
.game-tile.tile-512{ background: rgba(255,26,61,0.85); color: var(--neon); font-size: clamp(12px, 2vw, 18px); }
.game-tile.tile-1024{ background: var(--neon); color: var(--bg); font-size: clamp(10px, 1.8vw, 16px); }
.game-tile.tile-2048{ 
  background: var(--neon); 
  color: var(--bg); 
  font-size: clamp(10px, 1.8vw, 16px);
  box-shadow: 0 0 20px var(--neon-soft), 0 0 40px rgba(255,26,61,0.3);
  animation: pulse-neon 2s infinite;
}
@keyframes pulse-neon{
  0%, 100%{ box-shadow: 0 0 20px var(--neon-soft), 0 0 40px rgba(255,26,61,0.3); }
  50%{ box-shadow: 0 0 30px var(--neon-soft), 0 0 60px rgba(255,26,61,0.5); }
}
.game-controls{
  display: flex;
  justify-content: center;
  align-items: center;
  gap: 24px;
  margin-bottom: 16px;
}
.game-btn{
  background: transparent;
  border: 1px solid var(--neon);
  color: var(--neon);
  padding: 10px 20px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.2s ease;
  font-size: 14px;
  letter-spacing: 0.02em;
}
.game-btn:hover, .game-btn:focus{
  outline: none;
  box-shadow: 0 0 0 4px var(--ring), 0 0 16px rgba(255,26,61,0.25);
  transform: translateY(-1px);
}
.game-btn:active{
  transform: translateY(0);
}
.game-score{
  font-weight: 600;
  font-size: 16px;
}
.game-instructions{
  font-size: 14px;
  opacity: 0.7;
  max-width: 400px;
  margin: 0 auto;
  line-height: 1.5;
}

/* Game responsive */
@media (max-width: 640px){
  .game-container{
    max-width: 350px;
  }
  .game-board{
    gap: 6px;
    padding: 10px;
  }
  .game-tile{
    font-size: clamp(14px, 4vw, 20px);
  }
  .game-tile.tile-128, .game-tile.tile-256{
    font-size: clamp(12px, 3.5vw, 18px);
  }
  .game-tile.tile-512{
    font-size: clamp(10px, 3vw, 16px);
  }
  .game-tile.tile-1024, .game-tile.tile-2048{
    font-size: clamp(8px, 2.5vw, 14px);
  }
  .game-controls{
    flex-direction: column;
    gap: 16px;
  }
  .game-instructions{
    font-size: 13px;
  }
}

/* CV Upload Section */
.cv-section{
  background: radial-gradient(50% 50% at 50% 50%, rgba(255,26,61,0.03), transparent 70%);
  border-top: 1px dashed rgba(255,26,61,0.18);
}
.cv-subtitle{
  font-size: clamp(16px, 3vw, 18px);
  font-weight: 500;
  margin: 12px 0 20px 0;
  text-align: center;
  opacity: 0.8;
}
.cv-text-left{
  text-align: left;
}
.cv-upload-container{
  max-width: 600px;
  margin: 32px auto 0;
}
.cv-form{
  display: flex;
  flex-direction: column;
  gap: 24px;
  align-items: center;
}
.file-upload-area{
  width: 100%;
  min-height: 200px;
  border: 2px dashed rgba(255,26,61,0.3);
  border-radius: 12px;
  background: var(--bg-elev);
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
}
.file-upload-area:hover{
  border-color: var(--neon);
  box-shadow: 0 0 20px rgba(255,26,61,0.15);
  background: rgba(255,26,61,0.02);
}
.file-upload-area.dragover{
  border-color: var(--neon);
  box-shadow: 0 0 30px rgba(255,26,61,0.25);
  background: rgba(255,26,61,0.05);
}
.upload-content{
  text-align: center;
  padding: 40px 20px;
}
.upload-icon{
  font-size: 48px;
  margin-bottom: 16px;
  opacity: 0.7;
}
.upload-text{
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}
.upload-primary{
  font-size: 18px;
  font-weight: 600;
}
.upload-secondary{
  font-size: 14px;
  opacity: 0.7;
}
.file-info{
  display: flex;
  align-items: center;
  justify-content: space-between;
  width: 100%;
  padding: 20px;
  background: rgba(255,26,61,0.1);
  border-radius: 8px;
  margin: 16px;
}
.file-name{
  font-weight: 500;
  font-size: 16px;
}
.remove-file{
  background: none;
  border: none;
  color: var(--neon-dim);
  font-size: 18px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s ease;
}
.remove-file:hover{
  background: rgba(255,26,61,0.2);
  color: var(--neon);
}
.cv-submit-btn{
  background: transparent;
  border: 2px solid var(--neon);
  color: var(--neon);
  padding: 14px 32px;
  border-radius: 999px;
  font-weight: 700;
  cursor: pointer;
  transition: all 0.3s ease;
  font-size: 16px;
  letter-spacing: 0.02em;
  min-width: 160px;
}
.cv-submit-btn:hover:not(:disabled){
  background: var(--neon);
  color: var(--bg);
  box-shadow: 0 0 0 4px var(--ring), 0 0 20px rgba(255,26,61,0.3);
  transform: translateY(-2px);
}
.cv-submit-btn:active:not(:disabled){
  transform: translateY(0);
}
.cv-submit-btn:disabled{
  opacity: 0.4;
  cursor: not-allowed;
  border-color: rgba(255,26,61,0.3);
  color: rgba(255,26,61,0.3);
}
.cv-note{
  font-size: 13px;
  opacity: 0.7;
  text-align: center;
  margin: 0;
}

/* CV Upload responsive */
@media (max-width: 640px){
  .cv-upload-container{
    max-width: 100%;
  }
  .file-upload-area{
    min-height: 160px;
  }
  .upload-content{
    padding: 30px 16px;
  }
  .upload-icon{
    font-size: 36px;
    margin-bottom: 12px;
  }
  .upload-primary{
    font-size: 16px;
  }
  .upload-secondary{
    font-size: 13px;
  }
  .cv-submit-btn{
    padding: 12px 28px;
    font-size: 15px;
  }
  .file-info{
    padding: 16px;
    margin: 12px;
  }
  .file-name{
    font-size: 14px;
  }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  .btn{ transition: none; }
}