:root{
  --black:#050506;
  --void:#0a0a0c;
  --graphite:#111214;
  --panel:rgba(255,255,255,0.045);
  --panel-strong:rgba(255,255,255,0.08);
  --edge-top:rgba(255,255,255,0.22);
  --edge-bottom:rgba(0,0,0,0.35);
  --ink:#f2f2f4;
  --ink-soft:#c7c8cd;
  --ink-dim:#84868f;
  --silver:#e7e8ec;
  --line:rgba(255,255,255,0.09);
  --shadow:rgba(0,0,0,0.6);
}

*{margin:0;padding:0;box-sizing:border-box;}
html,body{height:100%;}

body{
  font-family:'Syne', sans-serif;
  background:var(--black);
  color:var(--ink);
  min-height:100vh;
  overflow-x:hidden;
  display:flex;
  flex-direction:column;
  position:relative;
  -webkit-font-smoothing:antialiased;
}

/* film-grain texture for premium print feel */
.grain{
  position:fixed;
  inset:0;
  z-index:2;
  opacity:0.05;
  mix-blend-mode:overlay;
  pointer-events:none;
  background-image:url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='120' height='120'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='2' stitchTiles='stitch'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
}

/* soft slow-moving graphite/silver light field */
.glow-field{
  position:fixed;
  inset:-10%;
  z-index:0;
  pointer-events:none;
  filter:blur(90px);
}
.orb{
  position:absolute;
  border-radius:50%;
  opacity:0.5;
}
.orb-a{
  width:640px;
  height:640px;
  top:-12%;
  left:8%;
  background:radial-gradient(circle, rgba(180,184,196,0.16), transparent 65%);
  animation:driftA 26s ease-in-out infinite alternate;
}
.orb-b{
  width:560px;
  height:560px;
  bottom:-16%;
  right:6%;
  background:radial-gradient(circle, rgba(120,124,138,0.18), transparent 65%);
  animation:driftB 30s ease-in-out infinite alternate;
}
@keyframes driftA{
  0%{ transform:translate(0,0) scale(1); }
  100%{ transform:translate(6%, 8%) scale(1.12); }
}
@keyframes driftB{
  0%{ transform:translate(0,0) scale(1); }
  100%{ transform:translate(-5%, -7%) scale(1.08); }
}

header, main, footer{ position:relative; z-index:5; }

header{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
  padding:24px clamp(20px, 5vw, 60px);
  opacity:0;
  animation:dropIn 0.7s cubic-bezier(.22,1,.36,1) forwards;
}

.brand{ display:flex; align-items:center; gap:12px; }
.brand img{
  width:34px; height:34px; border-radius:10px; display:block;
  box-shadow:0 4px 14px -4px rgba(0,0,0,0.6);
}
.brand span{
  font-weight:600;
  font-size:17px;
  letter-spacing:0.01em;
  color:var(--silver);
}

.glass-pill{
  background:var(--panel);
  border:1px solid var(--line);
  border-top-color:var(--edge-top);
  backdrop-filter:blur(22px) saturate(140%);
  -webkit-backdrop-filter:blur(22px) saturate(140%);
  border-radius:999px;
  padding:9px 18px;
  font-size:13px;
  font-weight:500;
  color:var(--ink-soft);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.10),
    0 8px 24px -12px var(--shadow);
}

main{
  flex:1;
  display:flex;
  flex-direction:column;
  align-items:center;
  justify-content:center;
  text-align:center;
  padding:20px 20px 60px;
}

.kicker{
  color:var(--ink-dim);
  font-size:14px;
  font-weight:500;
  letter-spacing:0.03em;
  margin-bottom:20px;
  opacity:0;
  animation:rise 0.8s cubic-bezier(.22,1,.36,1) forwards 0.12s;
}

h1{
  font-weight:800;
  font-size:clamp(2.6rem, 7vw, 5.2rem);
  line-height:1.02;
  letter-spacing:-0.02em;
  background:linear-gradient(175deg, #ffffff 0%, #ffffff 35%, #9a9ca4 100%);
  -webkit-background-clip:text;
  background-clip:text;
  color:transparent;
  opacity:0;
  animation:rise 0.9s cubic-bezier(.22,1,.36,1) forwards 0.24s;
}

.tagline{
  margin-top:20px;
  font-weight:500;
  font-size:clamp(1rem, 2vw, 1.15rem);
  color:var(--ink-dim);
  max-width:46ch;
  line-height:1.65;
  opacity:0;
  animation:rise 0.9s cubic-bezier(.22,1,.36,1) forwards 0.38s;
}
.tagline strong{ color:var(--ink); font-weight:700; }

@keyframes rise{ from{opacity:0; transform:translateY(18px);} to{opacity:1; transform:translateY(0);} }
@keyframes dropIn{ from{opacity:0; transform:translateY(-14px);} to{opacity:1; transform:translateY(0);} }

/* --- Showcase --- */
.showcase{
  margin-top:60px;
  display:flex;
  align-items:center;
  justify-content:center;
  gap:clamp(30px, 5vw, 70px);
  flex-wrap:wrap;
  max-width:980px;
  opacity:0;
  animation:rise 1s cubic-bezier(.22,1,.36,1) forwards 0.52s;
}

.cover-stage{
  position:relative;
  perspective:1500px;
}

.cover-ring{
  position:absolute;
  inset:-30px;
  border-radius:26px;
  border:1px solid rgba(255,255,255,0.06);
  animation:ringPulse 5s ease-in-out infinite;
  pointer-events:none;
  z-index:-1;
}
@keyframes ringPulse{
  0%,100%{ transform:scale(1); opacity:0.5; }
  50%{ transform:scale(1.035); opacity:0.9; }
}

.cover-frame{
  position:relative;
  width:230px;
  aspect-ratio:1573/2245;
  border-radius:20px;
  padding:10px;
  background:var(--panel);
  border:1px solid var(--line);
  border-top-color:var(--edge-top);
  border-bottom-color:var(--edge-bottom);
  backdrop-filter:blur(26px) saturate(150%);
  -webkit-backdrop-filter:blur(26px) saturate(150%);
  box-shadow:
    0 36px 80px -28px var(--shadow),
    0 0 0 1px rgba(255,255,255,0.03) inset,
    inset 0 1px 0 rgba(255,255,255,0.14);
  transform:rotateY(-14deg) rotateX(4deg);
  transition:transform 0.35s cubic-bezier(.22,1,.36,1);
  animation:float 6.5s ease-in-out infinite;
  overflow:hidden;
}
.cover-frame img{
  width:100%; height:100%;
  object-fit:cover;
  border-radius:12px;
  display:block;
  position:relative;
  z-index:1;
}
.sheen{
  position:absolute;
  top:-60%;
  left:-60%;
  width:60%;
  height:220%;
  background:linear-gradient(115deg, transparent 30%, rgba(255,255,255,0.22) 48%, transparent 65%);
  transform:rotate(12deg);
  z-index:2;
  pointer-events:none;
  animation:sweep 5.5s ease-in-out infinite;
}
@keyframes sweep{
  0%{ left:-60%; }
  35%{ left:130%; }
  100%{ left:130%; }
}
@keyframes float{
  0%,100%{ transform:rotateY(-14deg) rotateX(4deg) translateY(0); }
  50%{ transform:rotateY(-14deg) rotateX(4deg) translateY(-12px); }
}

.book-meta{ text-align:left; max-width:340px; }
.book-meta .label{
  font-size:12.5px;
  font-weight:600;
  letter-spacing:0.02em;
  color:var(--ink-dim);
  margin-bottom:12px;
}
.book-meta h2{
  font-size:clamp(1.6rem, 3vw, 2.1rem);
  font-weight:700;
  margin-bottom:8px;
  letter-spacing:-0.01em;
  color:var(--silver);
}
.book-meta .author{
  color:var(--ink-soft);
  font-size:14.5px;
  font-weight:600;
  margin-bottom:16px;
}
.book-meta .desc{
  color:var(--ink-dim);
  font-weight:500;
  font-size:14.5px;
  line-height:1.7;
  margin-bottom:22px;
}

.status-chip{
  display:inline-flex;
  align-items:center;
  gap:9px;
  background:var(--panel);
  border:1px solid var(--line);
  border-top-color:var(--edge-top);
  backdrop-filter:blur(18px);
  -webkit-backdrop-filter:blur(18px);
  padding:9px 17px;
  border-radius:999px;
  font-size:13px;
  font-weight:600;
  color:var(--ink);
}
.status-chip .dot{
  width:7px; height:7px; border-radius:50%;
  background:var(--silver);
  box-shadow:0 0 12px 3px rgba(230,230,235,0.4);
  animation:pulse 1.8s ease-in-out infinite;
}
@keyframes pulse{ 0%,100%{opacity:1;} 50%{opacity:0.3;} }

/* --- Notify --- */
.notify{
  margin-top:56px;
  width:100%;
  max-width:460px;
  opacity:0;
  animation:rise 1s cubic-bezier(.22,1,.36,1) forwards 0.66s;
}
.notify-shell{
  display:flex;
  align-items:center;
  gap:6px;
  background:var(--panel);
  border:1px solid var(--line);
  border-top-color:var(--edge-top);
  border-bottom-color:var(--edge-bottom);
  backdrop-filter:blur(24px) saturate(150%);
  -webkit-backdrop-filter:blur(24px) saturate(150%);
  border-radius:999px;
  padding:6px;
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.12),
    0 20px 50px -24px var(--shadow);
  transition:border-color 0.25s ease, box-shadow 0.25s ease;
}
.notify-shell:focus-within{
  border-color:rgba(255,255,255,0.28);
  box-shadow:
    inset 0 1px 0 rgba(255,255,255,0.16),
    0 0 0 4px rgba(255,255,255,0.06),
    0 20px 50px -24px var(--shadow);
}
.notify-shell input{
  flex:1;
  background:transparent;
  border:none;
  outline:none;
  color:var(--ink);
  font-family:'Syne', sans-serif;
  font-weight:500;
  font-size:14.5px;
  padding:13px 18px;
}
.notify-shell input::placeholder{ color:var(--ink-dim); }

.notify-shell button{
  position:relative;
  font-family:'Syne', sans-serif;
  font-weight:700;
  font-size:14px;
  color:#0a0a0b;
  background:linear-gradient(155deg, #ffffff, #c7c9d1);
  border:none;
  padding:13px 26px;
  border-radius:999px;
  cursor:pointer;
  transition:transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
  white-space:nowrap;
  min-width:118px;
}
.notify-shell button:hover:not(:disabled){
  transform:translateY(-1px);
  box-shadow:0 10px 28px -10px rgba(255,255,255,0.35);
}
.notify-shell button:disabled{ opacity:0.7; cursor:default; }

.btn-spinner{
  display:none;
  width:14px; height:14px;
  border-radius:50%;
  border:2px solid rgba(10,10,11,0.25);
  border-top-color:#0a0a0b;
  vertical-align:middle;
  margin-left:8px;
  animation:spin 0.7s linear infinite;
}
.notify-shell button.loading .btn-spinner{ display:inline-block; }
.notify-shell button.loading .btn-label{ opacity:0.75; }
@keyframes spin{ to{ transform:rotate(360deg); } }

.notify-note{
  margin-top:13px;
  font-size:12.5px;
  font-weight:500;
  color:var(--ink-dim);
  transition:color 0.2s ease;
}
.notify-note.success{ color:#d7f5df; }
.notify-note.error{ color:#f5b8b8; }

footer{
  padding:22px clamp(20px, 5vw, 60px) 30px;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  font-size:12.5px;
  font-weight:500;
  color:var(--ink-dim);
  border-top:1px solid var(--line);
}
footer a{ color:var(--ink-dim); text-decoration:none; }
footer a:hover{ color:var(--ink); }

@media (max-width:600px){
  .showcase{ flex-direction:column; }
  .book-meta{ text-align:center; max-width:300px; }
  .book-meta .desc{ margin-left:auto; margin-right:auto; }
}

@media (prefers-reduced-motion: reduce){
  .orb, .cover-frame, .sheen, .cover-ring, .status-chip .dot{ animation:none; }
  *{ animation-duration:0.01ms !important; }
}

:focus-visible{ outline:2px solid var(--silver); outline-offset:3px; }