:root {
    --bg-main: #F9F8F6;
    --bg-card: #FFFFFF;
    --text-main: #3C2A21;
    --text-muted: #8B7E74;
    --border: #E5E5E5;
    --btn-bg: #4A3B32; 
    --danger: #dc3545;
}

* { margin: 0; padding: 0; box-sizing: border-box; font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif; }
body { background-color: var(--bg-main); color: var(--text-main); height: 100vh; display: flex; justify-content: center; align-items: center; }

.login-card {
    background: var(--bg-card);
    padding: 40px;
    border-radius: 12px;
    box-shadow: 0 10px 25px rgba(60, 42, 33, 0.08);
    width: 100%;
    max-width: 400px;
    border: 1px solid var(--border);
    text-align: center;
}

.brand-logo { font-size: 40px; margin-bottom: 10px; }
.brand-title { font-size: 24px; font-weight: bold; margin-bottom: 5px; }
.brand-subtitle { font-size: 14px; color: var(--text-muted); margin-bottom: 30px; }

.form-group { margin-bottom: 20px; text-align: left; }
.form-label { display: block; font-size: 13px; font-weight: 600; margin-bottom: 8px; color: var(--text-muted); }
.form-control { width: 100%; padding: 12px 15px; border: 1px solid var(--border); border-radius: 8px; outline: none; font-size: 14px; transition: 0.2s; background: #fafafa;}
.form-control:focus { border-color: var(--text-main); background: #fff;}

.btn-login { width: 100%; padding: 14px; background: var(--btn-bg); color: #fff; border: none; border-radius: 8px; font-size: 15px; font-weight: bold; cursor: pointer; transition: 0.2s; margin-top: 10px;}
.btn-login:hover { background: #271a14; }

.alert { background: #fce8e6; color: var(--danger); padding: 12px; border-radius: 8px; font-size: 13px; margin-bottom: 20px; border: 1px solid #fad2cf; font-weight: 500;}

@media (max-width: 480px) {
    .login-card {
        padding: 30px 20px;
        border-radius: 0;
        border: none;
        box-shadow: none;
        height: 100vh;
        display: flex;
        flex-direction: column;
        justify-content: center;
    }
    body {
        background-color: var(--bg-card);
    }
}