/* Ogólne */
body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background: linear-gradient(120deg, #e0eafc 0%, #cfdef3 100%);
    margin: 0;
    padding: 40px;
}

.container {
    max-width: 800px;
    margin: auto;
    background: #fff;
    padding: 35px 40px;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(60, 60, 120, 0.15);
}

h1 {
    text-align: center;
    color: #2c3e50;
    margin-bottom: 25px;
    letter-spacing: 1px;
}

label {
    font-weight: 600;
    display: block;
    margin-top: 22px;
    color: #34495e;
    letter-spacing: 0.5px;
}

input, select, textarea {
    width: 100%;
    padding: 10px 12px;
    margin-top: 7px;
    border-radius: 6px;
    border: 1px solid #bfc9d1;
    font-size: 15px;
    transition: border-color 0.2s;
    background: #f8fafc;
}

input:focus, select:focus, textarea:focus {
    border-color: #5dade2;
    outline: none;
    background: #eef6fb;
}

.checkbox-group {
    margin-top: 10px;
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px 18px;
}

.checkbox-group label {
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    background: #f4f8fb;
    padding: 10px 12px;
    border-radius: 8px;
    border: 2px solid #e3e8ee;
    cursor: pointer;
    transition: background 0.2s, border 0.2s, box-shadow 0.2s;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.04);
    font-size: 1em;
    min-width: 0;
    justify-content: flex-start;
    position: relative;
    user-select: none;
}

.checkbox-group label:hover {
    background: #eaf3fa;
    border-color: #5dade2;
    box-shadow: 0 4px 16px rgba(52, 152, 219, 0.10);
}

.checkbox-group input[type="checkbox"] {
    accent-color: #2980b9;
    width: 18px;
    height: 18px;
    margin: 0;
}

.checkbox-group input[type="checkbox"]:checked + span {
    font-weight: 700;
    color: #2980b9;
}

.checkbox-group label span {
    transition: color 0.2s, font-weight 0.2s;
}

button {
    margin-top: 35px;
    padding: 14px;
    width: 100%;
    background: linear-gradient(90deg, #2980b9 0%, #6dd5fa 100%);
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 18px;
    font-weight: 600;
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(52, 152, 219, 0.08);
    transition: background 0.2s, box-shadow 0.2s;
}

button:hover {
    background: linear-gradient(90deg, #2471a3 0%, #48c6ef 100%);
    box-shadow: 0 4px 16px rgba(52, 152, 219, 0.13);
}

.info {
    font-size: 15px;
    color: #5d6d7e;
    margin-bottom: 22px;
    background: #f4f8fb;
    padding: 10px 18px;
    border-radius: 6px;
    border-left: 4px solid #5dade2;
}

.flash {
    margin-bottom: 18px;
    padding: 12px 18px;
    border-radius: 6px;
    font-size: 16px;
}

.flash.error {
    background: #fdecea;
    color: #c0392b;
    border-left: 4px solid #e74c3c;
}

.flash.success {
    background: #eafaf1;
    color: #229954;
    border-left: 4px solid #27ae60;
}

footer {
    margin-top: 40px;
    text-align: center;
    color: #888;
    font-size: 0.93em;
}

footer a {
    color: #444;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

footer a:hover {
    color: #222;
    text-decoration: underline;
}

textarea {
    resize: none;
    font-family: 'Segoe UI', Arial, sans-serif;
    font-size: 15px;
    width: 100%;
    box-sizing: border-box;
    min-width: 0;
    max-width: 100%;
}

@media (max-width: 600px) {
    body {
        padding: 8px;
    }
    .container {
        padding: 12px 6px;
        border-radius: 8px;
        box-shadow: 0 4px 16px rgba(60, 60, 120, 0.10);
        width: 100%;
        max-width: 100vw;
        min-width: 0;
        box-sizing: border-box;
    }
    h1 {
        font-size: 1.25em;
        margin-bottom: 14px;
    }
    label {
        font-size: 1em;
        margin-top: 14px;
    }
    input, select, textarea {
        font-size: 14px;
        padding: 8px 8px;
        width: 100%;
        min-width: 0;
        max-width: 100%;
        box-sizing: border-box;
    }
    .checkbox-group {
        grid-template-columns: 1fr;
        gap: 8px;
    }
    .checkbox-group label {
        font-size: 0.95em;
        padding: 8px 8px;
        border-radius: 6px;
    }
    button {
        font-size: 16px;
        padding: 10px;
        margin-top: 18px;
    }
    .info {
        font-size: 13px;
        padding: 8px 10px;
    }
    .flash {
        font-size: 14px;
        padding: 8px 10px;
    }
    footer {
        font-size: 0.85em;
        margin-top: 18px;
    }
}