body {
    font-family: 'Inter', Arial, sans-serif;
    background: #f3f4f6;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;
}

.box {
    background: white;
    padding: 40px;
    border-radius: 16px;
    width: auto;
    text-align: center;
    box-shadow: 0 8px 20px rgba(0,0,0,0.08);
    animation: fadeIn .25s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Większe logo */
.logo {
    width: 160px;
    margin-bottom: 30px;
    filter: drop-shadow(0 1px 1px rgba(0,0,0,0.2));
}

/* Nagłówki */
h2 {
    font-size: 22px;
    margin-bottom: 25px;
    color: #111827;
    font-weight: 600;
}

/* Input */
.input, .input-file {
    width: auto;
    padding: 14px;
    border: 2px solid #e5e7eb;
    border-radius: 10px;
    font-size: 15px;
    transition: 0.2s;
    background: #fafafa;
}

.input:hover, .input-file:hover {
    border-color: #cbd5e1;
}

.input:focus {
    border-color: #4a7aff;
    background: white;
    outline: none;
}

button {
    width: 100%;
    padding: 12px 0;
    border: none;
    background: #4a7aff;
    color: white;
    font-size: 17px;
    border-radius: 10px;
    cursor: pointer;
    margin-top: 10px;
    transition: .2s;
    font-weight: 500;
}

button:hover {
    background: #3b5dde;
}

/* Alerty */
.alert {
    padding: 14px;
    border-radius: 10px;
    margin-bottom: 20px;
    font-weight: 500;
    font-size: 15px;
}

.alert.success {
    background: #d1fae5;
    color: #065f46;
    border: 1px solid #10b981;
}

.alert.error {
    background: #fee2e2;
    color: #991b1b;
    border: 1px solid #ef4444;
}

/* Dashboard table */
table {
    width: 100%;
}

th {
    text-align: left;
    padding: 10px 0;
    color: #6b7280;
    font-weight: 600;
}

td {
    padding: 10px 0;
    font-size: 15px;
    color: #1f2937;
    border-bottom: 1px solid #e5e7eb;
}