* { box-sizing: border-box; }
body { margin: 0; font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif; background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%); min-height: 100vh; display: flex; align-items: center; justify-content: center; color: #e4e4e7; }
.login-wrap { width: 100%; max-width: 400px; padding: 20px; }
.login-card { background: rgba(255,255,255,.06); border-radius: 12px; padding: 40px; box-shadow: 0 8px 32px rgba(0,0,0,.3); border: 1px solid rgba(255,255,255,.08); }
.login-card h1 { margin: 0 0 28px; font-size: 22px; font-weight: 600; text-align: center; }
.login-form .field { margin-bottom: 18px; }
.login-form label { display: block; margin-bottom: 6px; font-size: 13px; color: #a1a1aa; }
.login-form input[type="text"], .login-form input[type="password"] { width: 100%; padding: 10px 12px; border: 1px solid rgba(255,255,255,.15); border-radius: 8px; background: rgba(0,0,0,.2); color: #fff; font-size: 14px; }
.login-form input::placeholder { color: #71717a; }
.login-form .row { display: flex; gap: 12px; align-items: flex-end; }
.login-form .captcha-input { flex: 1; }
.login-form .captcha-img-wrap { flex-shrink: 0; }
.login-form .captcha-img-wrap img { height: 40px; cursor: pointer; border-radius: 6px; display: block; }
.err-msg { color: #f87171; font-size: 13px; margin-bottom: 12px; min-height: 18px; }
.btn-primary { width: 100%; padding: 12px; background: #3b82f6; color: #fff; border: none; border-radius: 8px; font-size: 15px; cursor: pointer; font-weight: 500; }
.btn-primary:hover { background: #2563eb; }