* { box-sizing: border-box; }
body { margin: 0; min-height: 100vh; font-family: Arial, Helvetica, sans-serif; background: #f4f6f8; display: flex; align-items: center; justify-content: center; }
.login-container { width: 100%; max-width: 420px; padding: 20px; }
.login-card { background: #ffffff; border-radius: 14px; padding: 40px; box-shadow: 0 10px 35px rgba(0, 0, 0, 0.12); }
.logo { text-align: center; margin-bottom: 30px; }
.logo h1 { margin: 0; font-size: 28px; color: #1f4e79; }
.logo p { margin: 8px 0 0; color: #666; font-size: 14px; }
.form-group { margin-bottom: 20px; }
label { display: block; margin-bottom: 7px; font-weight: bold; color: #333; }
input { width: 100%; padding: 13px; border: 1px solid #ccd2d8; border-radius: 7px; font-size: 15px; outline: none; }
input:focus { border-color: #1f4e79; }
button { width: 100%; padding: 14px; border: none; border-radius: 7px; background: #1f4e79; color: white; font-size: 16px; font-weight: bold; cursor: pointer; }
button:hover { background: #163a5c; }
button:disabled { opacity: 0.7; cursor: not-allowed; }
#message { display: none; margin-bottom: 20px; padding: 12px; border-radius: 7px; font-size: 14px; }
.error { background: #fdeaea; color: #a12626; }
.success { background: #e8f7ed; color: #176b35; }
.footer { text-align: center; margin-top: 25px; color: #888; font-size: 12px; }