* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', sans-serif;
}

body {
    background: #0f172a;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
}

.login-container {
    width: 100%;
    display: flex;
    justify-content: center;
    padding: 20px;
}

.login-box {
    background: #1e293b;
    border: 1px solid #334155;
    border-radius: 16px;
    padding: 40px;
    width: 100%;
    max-width: 420px;
    box-shadow: 0 20px 60px rgba(0,0,0,0.4);
}

.logo {
    text-align: center;
    margin-bottom: 32px;
}

.logo h1 {
    color: #f8fafc;
    font-size: 28px;
    margin-bottom: 6px;
}

.logo p {
    color: #94a3b8;
    font-size: 14px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    color: #cbd5e1;
    font-size: 14px;
    margin-bottom: 8px;
    font-weight: 500;
}

.form-group input {
    width: 100%;
    padding: 12px 16px;
    background: #0f172a;
    border: 1px solid #334155;
    border-radius: 8px;
    color: #f8fafc;
    font-size: 15px;
    outline: none;
    transition: border-color 0.2s;
}

.form-group input:focus {
    border-color: #3b82f6;
}

button {
    width: 100%;
    padding: 13px;
    background: #3b82f6;
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 8px;
}

button:hover {
    background: #2563eb;
}

button:disabled {
    background: #475569;
    cursor: not-allowed;
}

.xeta {
    background: #450a0a;
    border: 1px solid #dc2626;
    color: #fca5a5;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
}

.ugur {
    background: #052e16;
    border: 1px solid #16a34a;
    color: #4ade80;
    padding: 12px 16px;
    border-radius: 8px;
    font-size: 14px;
    margin-bottom: 20px;
}

.gizli {
    display: none;
}