* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: 'Inter','Segoe UI',Arial,sans-serif;
  background: #0f172a;
  min-height: 100vh;
}

.wrap { width: 100%; padding: 20px; }

.topbar{
  display:flex;
  justify-content:space-between;
  align-items:center;
  margin-bottom: 18px;
}

.back{
  color:#93c5fd;
  text-decoration:none;
  font-weight:600;
}
.back:hover{ text-decoration: underline; }

.brand{
  color:#cbd5e1;
  font-weight:700;
  font-size: 13px;
  letter-spacing: .5px;
}

h2 {
  text-align: center;
  color: #00ff00;
  font-weight: 800;
  margin-bottom: 6px;
}

p {
  text-align: center;
  color: #cbd5e1;
  font-size: 14px;
  margin-bottom: 24px;
}

.card {
  background: #0f172a;
  border: 2px solid #00ff00;
  border-radius: 20px;
  padding: 24px;
  width: 100%;
  box-shadow: 0 15px 40px rgba(0, 0, 0, 0.35);
}

.row { display: flex; flex-direction: column; gap: 18px; }

label {
  font-weight: 700;
  font-size: 13px;
  margin-bottom: 6px;
  display: block;
  color: #00ff00;
}

input {
  width: 100%;
  padding: 13px 14px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  background: #f8fafc;
  font-size: 14px;
  transition: 0.2s ease;
}

input:focus {
  outline: none;
  border-color: #2563eb;
  background: #ffffff;
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.pw-wrap{
  display:flex;
  gap: 10px;
  align-items:center;
}

.pw-btn{
  padding: 12px 14px;
  border-radius: 12px;
  border: 1px solid #e2e8f0;
  background:#f8fafc;
  cursor:pointer;
  font-weight:700;
}

.actions { margin-top: 2px; }

.btn {
  width: 100%;
  padding: 14px;
  border-radius: 12px;
  border: none;
  font-weight: 800;
  font-size: 14px;
  cursor: pointer;
  transition: 0.25s ease;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  color: #ffffff;
  box-shadow: 0 10px 25px rgba(37, 99, 235, 0.35);
}

.btn:hover {
  transform: translateY(-2px);
  box-shadow: 0 15px 35px rgba(37, 99, 235, 0.45);
}

.btn:active { transform: scale(0.98); }

.result {
  margin-top: 26px;
  padding-top: 18px;
  border-top: 1px solid #e2e8f0;
}

.title { font-size: 16px; font-weight: 900; color: #0f172a; }
.msg { margin-top: 8px; font-size: 14px; color: #cbd5e1; word-break: break-word; }

.code-wrap{ margin-top: 14px; display:flex; gap: 10px; align-items:stretch; }
.code {
  flex: 1;
  font-size: 22px;
  font-weight: 900;
  letter-spacing: 2px;
  color: #16a34a;
  background: #f0fdf4;
  padding: 12px;
  border-radius: 12px;
  text-align: center;
  word-break: break-all;
}

.copy-btn{
  padding: 12px 14px;
  border-radius: 12px;
  border: none;
  font-weight: 800;
  background: #0f172a;
  color: #fff;
  cursor: pointer;
}
.copy-btn:hover{ opacity: .92; }

.hint {
  margin-top: 22px;
  font-size: 12px;
  color: #94a3b8;
  text-align: center;
}

@media (min-width: 768px) {
  .wrap { max-width: 520px; margin: auto; padding: 40px 20px; }
  .card { padding: 32px; }
}
/* ==============================
   HEADER
============================== */

.site-header {
  background: #0d1220;
  padding: 25px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  color: #00ff00;
}

.logo {
  color: #00ff00;
  font-weight: bold;
  text-decoration: none;
  font-size: 22px;
}

.nav-btn {
  color: #00ff00;
  text-decoration: none;
  font-weight: 600;
  font-size: 22px;
}

.nav-btn:hover {
  text-decoration: underline;
}

/* ==============================
   MAIN
============================== */

main {
  padding: 40px 20px;
}

/* ==============================
   FOOTER
============================== */

.site-footer {
  background: #0f172a;
  color: #94a3b8;
  text-align: center;
  padding: 18px;
  margin-top: 50px;
  font-size: 13px;
}