:root{
  --bg:#f7f8fa;
  --card:#ffffff;
  --muted:#7b8794;
  --accent:#3563f7;
  --accent-2:#00bfa6;
  --danger:#e64b4b;
  --glass:rgba(53,99,247,0.06);
  --radius:14px;
  --shadow-1:0 6px 18px rgba(45,55,66,0.06);
  --shadow-2:0 10px 30px rgba(20,30,50,0.06);
  font-family:'Poppins',system-ui,-apple-system,"Segoe UI",Roboto,"Helvetica Neue",Arial;
  color-scheme:light;
}

*{box-sizing:border-box}

html,body{
  height:100%;
  margin:0;
  background:var(--bg);
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
}

.app{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:center;
  padding:28px;
}

.card{
  width:100%;
  max-width:860px;
  background:var(--card);
  border-radius:var(--radius);
  box-shadow:var(--shadow-1),var(--shadow-2);
  padding:26px;
  display:flex;
  flex-direction:column;
  gap:18px;
}

.card__header{
  margin-bottom:2px;
  display:flex;
  align-items:center;
  gap:1rem;
}

.title{
  margin:0;
  font-size:20px;
  font-weight:600;
  color:#111827;
}

.subtitle{
  margin:6px 0 0;
  font-size:13px;
  color:var(--muted);
}

.logo{
  width:40px;
  height:auto;
  user-select:none;
}

.form{
  display:flex;
  flex-direction:column;
  gap:14px;
}

.field{
  display:flex;
  flex-direction:column;
  gap:8px;
}

.field__label{
  font-size:12px;
  color:var(--muted);
}

.input{
  background:transparent;
  border:1px solid rgba(16,24,40,0.06);
  padding:12px 14px;
  border-radius:10px;
  font-size:15px;
  color:#0b1320;
  outline:none;
  transition:box-shadow .22s ease,border-color .18s ease,transform .12s ease;
  box-shadow:0 1px 0 rgba(11,19,32,0.02);
}

.input::placeholder{color:#a1a7b3}

.input:focus{
  border-color:var(--accent);
  box-shadow:0 6px 18px rgba(53,99,247,0.08);
  transform:translateY(-1px);
}

.input--textarea{
  min-height:110px;
  resize:vertical;
}

.row{
  display:flex;
  gap:12px;
  align-items:flex-end;
  flex-wrap:wrap;
}

.field--small{
  flex:1 1 220px;
  min-width:180px;
}

.actions{
  display:flex;
  gap:10px;
  flex:1 1 300px;
  justify-content:flex-end;
}

.btn{
  border:1px solid rgba(16,24,40,0.06);
  background:transparent;
  padding:10px 14px;
  border-radius:10px;
  font-weight:600;
  cursor:pointer;
  transition:transform .12s ease,box-shadow .12s ease,background-color .12s ease;
  box-shadow:0 4px 10px rgba(11,19,32,0.03);
}

.btn:hover{transform:translateY(-3px)}
.btn:active{transform:translateY(-1px)}

.btn--primary{
  background:linear-gradient(90deg,var(--accent),#5b7dff);
  color:#fff;
  border:none;
  box-shadow:0 8px 24px rgba(53,99,247,0.12);
}

.btn--primary:hover{
  box-shadow:0 14px 40px rgba(53,99,247,0.14);
}

.icon-btn{
  background:transparent;
  border:1px solid rgba(16,24,40,0.06);
  padding:6px 10px;
  border-radius:8px;
  font-weight:600;
  cursor:pointer;
  margin-left:8px;
}

.icon-btn:hover{transform:translateY(-3px)}

.warning{
  min-height:20px;
  color:var(--danger);
  font-size:13px;
  opacity:0;
  transform:translateY(-6px);
  transition:opacity .18s ease,transform .18s ease;
}

.warning.show{
  opacity:1;
  transform:translateY(0);
}

@keyframes shake{
  0%{transform:translateX(0)}
  20%{transform:translateX(-6px)}
  40%{transform:translateX(6px)}
  60%{transform:translateX(-4px)}
  80%{transform:translateX(4px)}
  100%{transform:translateX(0)}
}

.warning.shake{
  animation:shake .42s cubic-bezier(.36,.07,.19,.97);
}

.result{
  margin-top:6px;
  border-radius:12px;
  border:1px solid rgba(16,24,40,0.04);
  background:linear-gradient(180deg,rgba(245,247,250,0.8),rgba(255,255,255,0.9));
  padding:12px;
  box-shadow:0 6px 18px rgba(10,15,25,0.03);
  opacity:0;
  transform:translateY(10px) scale(.995);
  transition:opacity .22s cubic-bezier(.2,.9,.2,1),transform .22s cubic-bezier(.2,.9,.2,1);
  pointer-events:none;
}

.result[aria-hidden="false"]{
  opacity:1;
  transform:translateY(0) scale(1);
  pointer-events:auto;
}

.result__meta{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:8px;
  margin-bottom:8px;
}

.result__label{
  color:var(--muted);
  font-size:13px;
  font-weight:600;
}

.result__text{
  font-family:ui-monospace,SFMono-Regular,Menlo,Monaco,"Roboto Mono",monospace;
  white-space:pre-wrap;
  word-break:break-word;
  font-size:14px;
  margin:0;
  padding:12px;
  border-radius:8px;
  background:rgba(10,15,25,0.02);
  border:1px dashed rgba(16,24,40,0.04);
  max-height:320px;
  overflow:auto;
}

.card__footer{
  color:var(--muted);
  font-size:12px;
}

.input:focus,
.btn:focus,
.icon-btn:focus,
.result__text:focus{
  outline:3px solid rgba(53,99,247,0.12);
  outline-offset:3px;
  
}
.file-name {
  font-size:13px;
  color:var(--muted);
  align-self:center;
}

.toast {
  position:fixed;
  top:20px;
  right:20px;
  background:#111827;
  color:white;
  padding:12px 16px;
  border-radius:10px;
  box-shadow:0 10px 30px rgba(0,0,0,0.25);
  font-size:14px;
  opacity:0;
  transform:translateY(-10px);
  transition:opacity .2s ease, transform .2s ease;
  z-index:9999;
}

.toast.show {
  opacity:1;
  transform:translateY(0);
}

.expiry-btn.selected {
  background: var(--accent);
  color: white;
  border: none;
  box-shadow: 0 8px 24px rgba(53,99,247,0.12);
}

@media (max-width:640px){
  .card{
    padding:18px;
    border-radius:12px;
  }

  .actions{
    justify-content:stretch;
    gap:8px;
  }

  .btn{
    flex:1 1 auto;
  }

  .row{
    align-items:flex-start;
  }
}