/* style.css */
* { box-sizing: border-box; }

:root{
  --bg:#f6f7f9;
  --card:#ffffff;
  --text:#111827;
  --muted:#6b7280;
  --border:#e5e7eb;
  --accent:#111827;
  --accent2:#2563eb;
}

body{
  margin:0;
  font-family: system-ui, -apple-system, Segoe UI, Roboto, Arial, sans-serif;
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
}

.container{
  width:min(980px, 92%);
  margin:0 auto;
}

header{
  background:#fff;
  border-bottom:1px solid var(--border);
}

.header-inner{
  padding:18px 0;
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:16px;
}

.brand{
  display:flex;
  flex-direction:column;
  gap:2px;
}

.brand h1{
  margin:0;
  font-size:18px;
  letter-spacing:.2px;
}

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

nav{
  display:flex;
  flex-wrap:wrap;
  gap:10px;
}

nav a{
  text-decoration:none;
  color:var(--text);
  font-size:14px;
  padding:8px 10px;
  border-radius:10px;
  border:1px solid transparent;
}

nav a:hover{
  background:#f1f2f4;
  border-color:var(--border);
}

main{
  padding:28px 0 46px;
}

.card{
  background:var(--card);
  border:1px solid var(--border);
  border-radius:16px;
  padding:22px;
  box-shadow:0 1px 0 rgba(0,0,0,0.03);
}

h2{
  margin:0 0 10px;
  font-size:22px;
}

p{ margin: 10px 0; }

ul{
  margin:10px 0 0;
  padding-left:18px;
}

li{ margin: 6px 0; }

.grid{
  display:grid;
  gap:18px;
}

@media (min-width: 800px){
  .grid.two{
    grid-template-columns: 1.3fr 0.7fr;
  }
}

/* forms */
form{
  display:grid;
  gap:12px;
  margin-top:12px;
  max-width:520px;
}

label{
  font-weight:600;
  font-size:14px;
}

input, textarea{
  width:100%;
  padding:10px 12px;
  border-radius:12px;
  border:1px solid #dfe1e6;
  background:#fff;
  font-size:14px;
}

input:focus, textarea:focus{
  outline:none;
  border-color:#b7bcc8;
  box-shadow:0 0 0 3px rgba(37, 99, 235, 0.12);
}

textarea{
  resize:vertical;
  min-height:120px;
}

button{
  border:0;
  border-radius:12px;
  padding:10px 14px;
  font-weight:700;
  cursor:pointer;
  background:var(--accent);
  color:#fff;
}

button:hover{ opacity:.92; }

.notice{
  padding:10px 12px;
  border-radius:12px;
  border:1px solid var(--border);
  background:#fafbfc;
  color:#333;
}

.notice.error{
  border-color:#e7b1b1;
  background:#fff5f5;
  color:#8a1f1f;
}

.small{
  font-size:13px;
  color:var(--muted);
}

footer{
  padding:18px 0;
  color:var(--muted);
  font-size:13px;
}