:root{
  --brand:#0f766e;
  --brand2:#0ea5e9;
  --light:#f7fafc;
  --dark:#0b1320;
}
*{box-sizing:border-box}
body{
  font-family:system-ui,-apple-system,Segoe UI,Roboto,Inter,Ubuntu,Arial,sans-serif;
  margin:0;
  background:#ffffff;
  color:#111827;
  line-height:1.5;
}
.header{
  background:linear-gradient(90deg,var(--brand),var(--brand2));
  color:white;
  padding:14px 20px;
}
.header .title{
  font-size:22px;
  font-weight:700;
}
nav{
  display:flex; gap:14px; flex-wrap:wrap; margin-top:6px;
}
nav a{
  color:white; text-decoration:none; padding:6px 10px; border-radius:9999px; background:rgba(255,255,255,.15);
}
nav a:hover{ background:rgba(255,255,255,.25)}
.container{
  max-width:1100px; margin:20px auto; padding:0 16px;
}
.grid{
  display:grid; grid-template-columns:repeat(12,1fr); gap:16px;
}
.card{
  background:#fff; border:1px solid #e5e7eb; border-radius:14px; padding:16px; box-shadow:0 2px 8px rgba(0,0,0,.04);
}
h1,h2,h3{margin:0 0 10px}
section{margin-bottom:22px}

footer{
  background:#0f172a; color:#cbd5e1; padding:16px; text-align:center; margin-top:40px;
}


.calendar{
  width:100%; border-collapse:collapse; table-layout:fixed;
}
.calendar th,.calendar td{
  border:1px solid #e5e7eb; padding:10px; vertical-align:top; height:90px; overflow:hidden;
}
.calendar th{ background:#f1f5f9; font-weight:600; text-align:center}
.day-num{ font-size:12px; color:#64748b}
.event{ display:block; margin-top:6px; padding:4px 6px; background:#e0f2fe; border-radius:8px; cursor:pointer; font-size:12px}
.badge{display:inline-block; padding:2px 8px; border-radius:9999px; background:#e2e8f0; font-size:12px}
label{display:block; font-size:14px; color:#334155; margin-bottom:6px}
input,select,button,textarea{
  font:inherit; padding:10px 12px; border:1px solid #e5e7eb; border-radius:10px; width:100%;
}
button{ background:var(--brand); color:white; border:none; cursor:pointer}
button:hover{ filter:brightness(1.05)}
.form-row{display:grid; grid-template-columns:repeat(12,1fr); gap:12px; align-items:end}
.form-col-6{grid-column:span 6}
.form-col-4{grid-column:span 4}
.form-col-3{grid-column:span 3}
.form-col-12{grid-column:span 12}

.notice{
  padding:12px 14px; border-radius:10px; background:#f0fdf4; border:1px solid #bbf7d0; color:#166534
}
.notice.error{ background:#fef2f2; border-color:#fecaca; color:#991b1b}


@media (max-width:800px){
  .grid{grid-template-columns:repeat(6,1fr)}
  .form-col-6{grid-column:span 6}
  .form-col-4{grid-column:span 6}
  .form-col-3{grid-column:span 6}
}