:root{
  --bg:#edf4ee;
  --bg2:#f7faf5;
  --panel:#fbfcf8;
  --panel-2:#f3f7ef;
  --line:#d7e3d5;
  --text:#1d3023;
  --muted:#5e6e62;
  --green:#5f8f63;
  --blue:#5f8fa4;
  --ok:#4f8a5b;
  --error:#b95050;
  --shadow:0 20px 42px rgba(29,48,35,.08);
  --radius:24px;
}

*{box-sizing:border-box;}
html{scroll-behavior:smooth;}
body{
  margin:0;
  min-height:100vh;
  color:var(--text);
  font-family:"Microsoft JhengHei",system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif;
  background:
    linear-gradient(180deg, rgba(235,243,234,.95), rgba(244,248,242,.98) 50%, rgba(238,244,247,.98));
}

a{color:inherit;}

.register-shell{
  min-height:100vh;
  display:grid;
  grid-template-columns:1fr .92fr;
  gap:28px;
  align-items:center;
  padding:28px clamp(18px, 4vw, 40px);
}

.register-intro{
  max-width:620px;
}
.brand{
  display:inline-flex;
  align-items:center;
  gap:12px;
  text-decoration:none;
  margin-bottom:22px;
}
.brand-mark{
  width:42px;
  height:42px;
  border-radius:14px;
  display:grid;
  place-items:center;
  background:linear-gradient(135deg, rgba(95,143,99,.18), rgba(95,143,164,.12));
  border:1px solid rgba(95,143,99,.18);
  color:var(--green);
  font-weight:700;
}
.brand-copy strong{display:block;font-size:15px;line-height:1.2;}
.brand-copy small{display:block;margin-top:2px;color:var(--muted);font-size:11px;}

.eyebrow{
  margin:0 0 10px;
  color:var(--green);
  font-size:12px;
  letter-spacing:.12em;
  text-transform:uppercase;
}
.register-intro h1{
  margin:0;
  font-size:clamp(34px, 4.6vw, 54px);
  line-height:1.08;
  max-width:10ch;
}
.lead{
  margin:18px 0 0;
  max-width:56ch;
  color:var(--muted);
  line-height:1.8;
  font-size:16px;
}
.benefits{
  list-style:none;
  padding:0;
  margin:24px 0 0;
  display:grid;
  gap:10px;
}
.benefits li{
  padding:12px 14px;
  border-radius:16px;
  background:rgba(255,255,255,.60);
  border:1px solid rgba(95,143,99,.12);
  color:var(--muted);
  line-height:1.6;
}
.benefits strong{color:var(--text);}

.register-card{
  width:min(100%, 520px);
  margin-left:auto;
  padding:24px;
  border-radius:28px;
  background:
    linear-gradient(180deg, rgba(251,252,248,.98), rgba(243,247,239,.98));
  border:1px solid rgba(95,143,99,.12);
  box-shadow:var(--shadow);
}
.card-head h2{
  margin:0;
  font-size:26px;
}
.sub{
  margin:8px 0 0;
  color:var(--muted);
  line-height:1.7;
  font-size:14px;
}

.register-form{
  margin-top:20px;
  display:grid;
  gap:12px;
}
.field{
  display:grid;
  gap:8px;
}
.field span{
  font-size:13px;
  color:var(--muted);
}
input{
  width:100%;
  min-height:46px;
  padding:0 14px;
  border-radius:14px;
  border:1px solid rgba(95,143,99,.16);
  background:rgba(255,255,255,.76);
  color:var(--text);
  font-size:14px;
  outline:none;
  transition:border-color .15s, box-shadow .15s, background .15s;
}
input:focus{
  border-color:rgba(95,143,99,.44);
  box-shadow:0 0 0 3px rgba(95,143,99,.10);
  background:#fff;
}
input::placeholder{color:#95a598;}
.submit-btn{
  min-height:46px;
  margin-top:4px;
  border:none;
  border-radius:999px;
  background:linear-gradient(135deg, #6f9c73, #87aea0);
  color:#fff;
  font-size:15px;
  font-weight:700;
  cursor:pointer;
  box-shadow:0 10px 24px rgba(95,143,99,.16);
  transition:transform .08s, opacity .15s;
}
.submit-btn:active{transform:translateY(1px);}
.submit-btn:disabled{opacity:.7;cursor:not-allowed;}

.msg{
  min-height:20px;
  margin-top:2px;
  font-size:13px;
  color:var(--muted);
}
.msg.error{color:var(--error);}
.msg.ok{color:var(--ok);}

.footer-links{
  display:flex;
  justify-content:space-between;
  gap:12px;
  flex-wrap:wrap;
  margin-top:18px;
  font-size:13px;
}
.footer-links a{
  color:var(--green);
  text-decoration:none;
  border-bottom:1px solid transparent;
  transition:border-color .15s;
}
.footer-links a:hover{
  border-bottom-color:currentColor;
}

@media (max-width: 960px){
  .register-shell{
    grid-template-columns:1fr;
    align-items:start;
  }
  .register-card{
    margin-left:0;
  }
}

@media (max-width: 640px){
  .register-shell{
    padding:18px;
    gap:18px;
  }
  .register-intro h1{
    max-width:none;
  }
  .register-card{
    padding:20px;
    border-radius:22px;
  }
  .footer-links{
    flex-direction:column;
  }
}