* { margin: 0; padding: 0; box-sizing: border-box; }
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
}
.login-container {
    width: 100%;
    padding: 20px;
}
.login-box {
    max-width: 400px;
    margin: 0 auto;
    background: white;
    border-radius: 16px;
    padding: 48px 40px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.3);
}
h1 {
    font-size: 28px;
    font-weight: 700;
    color: #333;
    text-align: center;
    margin-bottom: 8px;
}
.subtitle {
    text-align: center;
    color: #888;
    font-size: 14px;
    margin-bottom: 32px;
}
.input-group {
    margin-bottom: 20px;
}
.input-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: #555;
    margin-bottom: 6px;
}
.input-group input {
    width: 100%;
    padding: 12px 14px;
    font-size: 16px;
    border: 2px solid #e0e0e0;
    border-radius: 8px;
    transition: border-color 0.3s;
    outline: none;
}
.input-group input:focus {
    border-color: #667eea;
}
.error-msg {
    background: #fee;
    color: #c33;
    padding: 10px 14px;
    border-radius: 6px;
    font-size: 14px;
    margin-bottom: 16px;
    border-left: 4px solid #c33;
}
button {
    width: 100%;
    padding: 14px;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: transform 0.2s;
}
button:hover {
    transform: translateY(-2px);
}
.footer {
    text-align: center;
    color: #aaa;
    font-size: 12px;
    margin-top: 24px;
}