/* ===== Base palette & reset ===== */
:root{--accent:#54ffda;--bg:#0b0b10;--fg:#e6f7ff;--glass:rgba(255,255,255,.06);--blur:10px}
*{box-sizing:border-box;margin:0;padding:0}
html,body{
  height:100%;background:var(--bg);color:var(--fg);
  font-family:'IBM Plex Mono',monospace;-webkit-font-smoothing:antialiased;
  overflow-x:hidden}

/* ===== Background animation ===== */
.hex{position:fixed;inset:0;z-index:-3;
  background:radial-gradient(circle at 50% 120%,#000 20%,#102125 60%,#000 100%)}
.hex::before{
  content:"";position:absolute;inset:0;background-size:60px 104px;
  background-image:
    linear-gradient(60deg,transparent 0 10%,rgba(84,255,218,.05) 10% 11%,
                    transparent 11% 18%,rgba(84,255,218,.05) 18% 19%,
                    transparent 19% 100%),
    linear-gradient(-60deg,transparent 0 10%,rgba(84,255,218,.05) 10% 11%,
                    transparent 11% 18%,rgba(84,255,218,.05) 18% 19%,
                    transparent 19% 100%);
  animation:bgmove 40s linear infinite}
@keyframes bgmove{to{background-position:0 104px}}

/* ===== Header ===== */
header{
  position:sticky;top:0;z-index:5;width:100%;
  display:flex;justify-content:space-between;align-items:center;
  padding:.85rem 1.3rem;background:rgba(11,11,16,.55);
  backdrop-filter:blur(8px);border-bottom:1px solid rgba(84,255,218,.14)}
.logo{font-size:1.15rem;color:var(--accent);letter-spacing:.05em;cursor:pointer}
nav a{
  margin-left:1.3rem;color:var(--fg);text-decoration:none;cursor:pointer;
  font-weight:500;transition:color .25s}
nav a:hover{color:var(--accent)}

/* ===== Hero / main ===== */
main{padding:3rem 1rem 2rem;display:flex;flex-direction:column;align-items:center;text-align:center}
h1{
  font-size:clamp(3rem,8vw,5rem);letter-spacing:.04em;
  background:linear-gradient(90deg,var(--accent),#86fff1);
  -webkit-background-clip:text;color:transparent;text-shadow:0 0 12px rgba(84,255,218,.5)}
p.sub{font-size:clamp(1.1rem,3vw,1.45rem);max-width:760px;margin-top:1.1rem;line-height:1.5}
.hud{
  margin-top:1.6rem;padding:.6rem 1.1rem;border:2px solid var(--accent);
  border-radius:10px;background:rgba(84,255,218,.08);backdrop-filter:blur(var(--blur));
  font-weight:500}

/* ===== Form ===== */
form{margin-top:1.8rem;display:flex;flex-wrap:wrap;gap:.8rem;
  justify-content:center;width:100%;max-width:520px}
input[type=email]{
  flex:1 1 230px;padding:1rem;border:1px solid var(--accent);
  border-radius:8px;background:rgba(0,0,0,.65);color:var(--accent)}
button{
  padding:1rem 2.3rem;border:none;border-radius:8px;background:var(--accent);
  color:#000;font-weight:600;cursor:pointer;
  box-shadow:0 0 18px rgba(84,255,218,.45);
  transition:transform .25s,box-shadow .25s}
button:hover{transform:translateY(-4px);box-shadow:0 0 28px rgba(84,255,218,.85)}

/* ===== Cards ===== */
.deck{margin-top:2.3rem;display:grid;grid-template-columns:repeat(auto-fit,minmax(260px,1fr));
  gap:1.4rem;width:100%;max-width:980px}
.card{
  position:relative;padding:1.6rem;border-radius:16px;background:var(--glass);
  backdrop-filter:blur(var(--blur));border:1px solid rgba(84,255,218,.15);
  box-shadow:0 0 22px rgba(84,255,218,.15);cursor:pointer;
  transition:transform .35s,box-shadow .35s}
.card:hover{transform:translateY(-8px) scale(1.03);box-shadow:0 0 32px rgba(84,255,218,.35)}
.card h3{font-size:1.25rem;color:var(--accent);margin-bottom:.6rem}
.card p{font-size:.9rem;line-height:1.45;opacity:.9}
.card::after{
  content:"";position:absolute;width:6px;height:6px;top:14px;right:14px;
  border-radius:50%;background:var(--accent);animation:blink 2s infinite alternate}
@keyframes blink{0%{opacity:.3}100%{opacity:.9}}

/* ===== Timer & footer ===== */
.timer{margin-top:1.8rem;font-weight:500;color:var(--accent)}
footer{margin-top:3rem;font-size:.8rem;opacity:.7;padding:1.5rem 0;
  border-top:1px solid rgba(84,255,218,.14)}
footer a{color:var(--accent);text-decoration:none}

/* ===== Modal ===== */
.modal{position:fixed;inset:0;display:flex;justify-content:center;align-items:center;
  background:rgba(0,0,0,.75);z-index:10;visibility:hidden;opacity:0;transition:opacity .3s}
.modal.open{visibility:visible;opacity:1}
.modal-content{
  position:relative;width:90%;max-width:480px;padding:2rem;border-radius:16px;
  background:var(--glass);backdrop-filter:blur(var(--blur));
  border:2px solid var(--accent);text-align:center;
  box-shadow:0 0 32px rgba(84,255,218,.45)}
.modal-content h2{font-size:1.4rem;color:var(--accent);margin-bottom:.9rem}
.close{
  position:absolute;top:14px;right:14px;width:34px;height:34px;border-radius:50%;
  display:flex;justify-content:center;align-items:center;border:2px solid var(--accent);
  color:var(--accent);cursor:pointer;font-weight:600}
.close:hover{background:var(--accent);color:#000}

/* ===== Responsive patch ===== */
body{max-width:100vw}
@media(max-width:600px){
  h1{font-size:2.8rem}
  .logo{font-size:1rem}
  nav a{margin-left:1rem;font-size:.9rem}
  .deck{grid-template-columns:1fr}
  .modal-content{max-width:94vw;padding:1.4rem}
}
@media(max-width:350px){
  h1{font-size:2.2rem}
  .sub{font-size:.95rem}
  button,input[type=email]{font-size:.9rem}
}

/* guarantee media never overflow */
img,video,svg,iframe{max-width:100%;height:auto}

/* --- Library card polish ----------------------------------- */
/* library card – kill blue links, tighten rhythm */
.libcard{display:block;padding:1.4rem 1.6rem;color:var(--fg);text-decoration:none}
.libcard:visited,.libcard:hover{color:var(--fg)}
.libcard h3{margin:0 0 .45rem}
.libcard p{margin:0}
.libcard .meta{display:block;margin-top:.55rem;font-size:.8rem;opacity:.7}