:root{
  --bg: #0b0f17;
  --card: rgba(255,255,255,.06);
  --card2: rgba(255,255,255,.09);
  --text: rgba(255,255,255,.92);
  --muted: rgba(255,255,255,.65);
  --border: rgba(255,255,255,.14);
  --accent: #7bdcb5; /* vert doux */
  --danger: #ff6b6b;

  --radius: 16px;
  --shadow: 0 20px 60px rgba(0,0,0,.35);
  --max: 980px;
}

*{ box-sizing: border-box; }
html,body{ height:100%; }
body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: radial-gradient(900px 600px at 20% 10%, rgba(123,220,181,.18), transparent 60%),
              radial-gradient(900px 600px at 80% 30%, rgba(135,189,255,.16), transparent 60%),
              var(--bg);
  color: var(--text);
  padding: 24px 14px;
}

h1{
  font-size: 22px;
  margin: 0 0 14px 0;
  letter-spacing: .2px;
}

header{
  max-width: var(--max);
  margin: 0 auto 16px auto;
  display:flex;
  align-items:center;
  justify-content: space-between;
  gap: 12px;
  padding: 14px 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--card2), var(--card));
  box-shadow: var(--shadow);
}

main{
  max-width: var(--max);
  margin: 0 auto;
  padding: 16px;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: linear-gradient(180deg, var(--card2), var(--card));
  box-shadow: var(--shadow);
}

/* Form */
form{
  display:grid;
  gap: 12px;
}

label{
  display:block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
}

input{
  width: 100%;
  padding: 12px 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.20);
  color: var(--text);
  outline: none;
}

input:focus{
  border-color: rgba(123,220,181,.5);
  box-shadow: 0 0 0 4px rgba(123,220,181,.14);
}

button{
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid rgba(123,220,181,.45);
  background: rgba(123,220,181,.14);
  color: var(--text);
  cursor: pointer;
  font-weight: 600;
  transition: transform .06s ease, background .2s ease, border-color .2s ease;
}

button:hover{
  background: rgba(123,220,181,.20);
  border-color: rgba(123,220,181,.60);
}

button:active{
  transform: translateY(1px);
}

pre{
  margin-top: 12px;
  padding: 12px;
  border-radius: 12px;
  border: 1px solid var(--border);
  background: rgba(0,0,0,.24);
  overflow:auto;
  min-height: 54px;
}

/* Login page layout helper */
.page{
  max-width: 520px;
  margin: 0 auto;
}

.helper{
  font-size: 13px;
  color: var(--muted);
  margin-top: 10px;
}

.error{
  margin-top: 10px;
  color: var(--danger);
  font-weight: 600;
}

@media (min-width: 860px){
  body{ padding: 40px 22px; }
  h1{ font-size: 24px; }
}