* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', sans-serif;
    background: linear-gradient(135deg, #f8f9fc 0%, #eef2f5 100%);
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.login-card {
    background: white;
    max-width: 480px;
    width: 100%;
    padding: 40px 32px;
    border-radius: 32px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.08), 0 6px 12px rgba(0, 0, 0, 0.05);
    transition: transform 0.2s;
}

h1 {
    font-size: 28px;
    font-weight: 600;
    color: #1e293b;
    margin-bottom: 8px;
}

.subtitle {
    color: #5b6e8c;
    font-size: 14px;
    margin-bottom: 32px;
    border-left: 3px solid #f97316;
    padding-left: 12px;
}

.input-group {
    margin-bottom: 24px;
}

label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: #0f172a;
    margin-bottom: 8px;
}

input {
    width: 100%;
    padding: 14px 16px;
    font-size: 15px;
    border: 1px solid #cbd5e1;
    border-radius: 20px;
    background: #fff;
    transition: all 0.2s;
    outline: none;
}

input:focus {
    border-color: #f97316;
    box-shadow: 0 0 0 3px rgba(249, 115, 22, 0.15);
}

button {
    width: 100%;
    background: #f97316;
    color: white;
    border: none;
    padding: 14px;
    font-size: 16px;
    font-weight: 600;
    border-radius: 40px;
    cursor: pointer;
    transition: background 0.2s, transform 0.1s;
    margin-top: 8px;
}

button:hover {
    background: #ea580c;
}

button:active {
    transform: scale(0.97);
}

.error-message {
    background: #fee2e2;
    color: #b91c1c;
    padding: 12px;
    border-radius: 16px;
    font-size: 13px;
    margin-bottom: 24px;
    display: none;
    border-left: 3px solid #b91c1c;
}

.demo-users {
    background: #f8fafc;
    border-radius: 20px;
    padding: 16px;
    margin-top: 28px;
    font-size: 13px;
    color: #334155;
    text-align: center;
}

.demo-users span {
    display: inline-block;
    background: #e2e8f0;
    padding: 4px 10px;
    border-radius: 20px;
    margin: 4px;
    font-family: monospace;
}