<!DOCTYPE html>
<html lang="zh-CN">
<head>
<meta charset="UTF-8">
<meta name="viewport" content="width=device-width, initial-scale=1.0">
<title>🛠️ Ops-Assistant - 登录</title>
<style>
:root{
  --bg:#0f172a;
  --card:#111827;
  --text:#e5e7eb;
  --muted:#9ca3af;
  --border:#1f2937;
  --accent:#f97316;
  --accent2:#ea580c;
}
* { margin: 0; padding: 0; box-sizing: border-box; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: radial-gradient(1200px 600px at 10% 10%, rgba(249,115,22,.18), transparent 60%),
              radial-gradient(900px 500px at 90% 10%, rgba(234,88,12,.18), transparent 60%),
              var(--bg);
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  color: var(--text);
}

.login-card {
  background: var(--card);
  border-radius: 16px;
  padding: 36px 30px;
  width: 100%;
  max-width: 380px;
  border: 1px solid var(--border);
  box-shadow: 0 20px 60px rgba(0,0,0,.35);
  animation: slideUp .4s ease;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

.login-logo {
  text-align: center;
  margin-bottom: 24px;
}
.login-logo .icon { font-size: 48px; }
.login-logo h1 {
  font-size: 22px;
  color: var(--text);
  margin-top: 8px;
}
.login-logo .subtitle {
  font-size: 13px;
  color: var(--muted);
  margin-top: 4px;
}

.form-group {
  margin-bottom: 16px;
}
.form-group label {
  display: block;
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 6px;
  font-weight: 500;
}
.form-group input {
  width: 100%;
  padding: 12px 14px;
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 15px;
  transition: border-color .2s, box-shadow .2s;
  outline: none;
  background: #0b1220;
  color: var(--text);
}
.form-group input:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 2px rgba(249,115,22,.2);
}

.btn-login {
  width: 100%;
  padding: 12px;
  background: linear-gradient(135deg, var(--accent), var(--accent2));
  color: #fff;
  border: none;
  border-radius: 10px;
  font-size: 15px;
  font-weight: 600;
  cursor: pointer;
  transition: opacity .2s, transform .1s;
  margin-top: 6px;
}
.btn-login:hover { opacity: .9; }
.btn-login:active { transform: scale(.98); }

.error-msg {
  background: rgba(239,68,68,.12);
  color: #fca5a5;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 14px;
  text-align: center;
  border: 1px solid rgba(239,68,68,.3);
}
</style>
</head>
<body>
<div class="login-card">
  <div class="login-logo">
    <div class="icon">🦞</div>
    <h1>Ops-Assistant</h1>
    <div class="subtitle">{{.version}}</div>
  </div>

  {{if .error}}
  <div class="error-msg">{{.error}}</div>
  {{end}}

  <form method="POST" action="/login">
    <div class="form-group">
      <label>用户名</label>
      <input type="text" name="username" placeholder="请输入用户名" autocomplete="username" autofocus required>
    </div>
    <div class="form-group">
      <label>密码</label>
      <input type="password" name="password" placeholder="请输入密码" autocomplete="current-password" required>
    </div>
    <button class="btn-login" type="submit">登录</button>
  </form>
</div>
</body>
</html>
