body {
    font-family: Arial, sans-serif;
    background: #f9fbfd;
    padding: 30px;
}

.container {
    max-width: 1000px;
    margin: auto;
    background-color: #ffffff;
    padding: 30px;
    border-radius: 10px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.05);
}

h2 {
    text-align: center;
    color: #333;
    margin-bottom: 20px;
}

input, textarea, select {
    width: 100%;
    padding: 12px;
    font-size: 15px;
    margin: 10px 0;
    border: 1px solid #ccc;
    border-radius: 6px;
    box-sizing: border-box;
}

textarea {
    min-height: 120px;
    resize: vertical;
}

button {
    padding: 12px 20px;
    border: none;
    border-radius: 6px;
    font-size: 15px;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    margin: 10px 0;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.15);
}

.btn-check {
    background-color: #007bff;
    color: white;
}

.btn-clear {
    background-color: #dc3545;
    color: white;
}

.btn-copy {
    background-color: #28a745;
    color: white;
}

.result-box {
    margin-top: 25px;
    padding: 20px;
    border-radius: 8px;
    font-size: 16px;
    background-color: #ffffff;
    border: 1px solid #ddd;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.05);
}

.result-box.success {
    background-color: #e0ffe0;
    border-color: #a3d9a3;
    color: #2b7a2b;
}

.result-box.fail {
    background-color: #ffe0e0;
    border-color: #f5a3a3;
    color: #c00;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 25px;
    font-size: 15px;
}

th, td {
    border: 1px solid #ddd;
    padding: 12px 10px;
    text-align: center;
}

th {
    background-color: #f2f2f2;
    font-weight: bold;
    color: #333;
}

tr:hover {
    background-color: #f9f9f9;
}

.flex {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.flex > div {
    width: 100%;
}

@media (min-width: 768px) {
    .flex {
        flex-direction: row;
        align-items: flex-end;
    }
}

.status-live,
.status-die {
    display: inline-block;
    min-width: 48px;
    padding: 4px 10px;
    border-radius: 20px;
    font-weight: 600;
    font-size: 14px;
    text-align: center;
    border: 1px solid transparent;
    box-shadow: 0 1px 3px rgba(0, 0, 0, .1);
}

.status-live {
    background-color: #e0ffe0;
    border-color: #a3d9a3;
    color: #2b7a2b;
}

.status-die {
    background-color: #ffe0e0;
    border-color: #f5a3a3;
    color: #c00;
}

#proxy-progress {
    font-weight: bold;
    margin-top: 20px;
    color: #555;
}

.live-count {
    color: #28a745;
    font-weight: bold;
}

.die-count {
    color: #dc3545;
    font-weight: bold;
}


.form-inline {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
}

.form-inline label {
    white-space: nowrap;
    min-width: 160px; /* cho label đều nhau, có thể tùy chỉnh */
}

.form-inline input {
    flex: 1;
    max-width: 100%;
}


.form-inline button {
    white-space: nowrap;
}

@media (max-width: 767px) {
    .form-inline {
        flex-direction: column;
        align-items: stretch;
    }

    .form-inline input,
    .form-inline button {
        width: 100% !important;
        max-width: 100% !important;
    }

    .form-inline label {
        min-width: auto;
    }
}