:root {
    --main-blue: #0066cc;
    --light-blue: #e9f1fb;
    --gray: #f6f8fa;
    --border: #e0e0e0;
    --radius: 12px;
    --shadow: 0 4px 16px rgba(0,0,0,0.07);
    --icon-size: 28px;
}

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--gray);
    margin: 0;
    padding: 0;
}

.container {
    max-width: 430px;
    margin: 32px auto;
    background: #fff;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px 10px 24px 10px;
}

.tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    justify-content: space-between;
    background: #f5faff;
    border-radius: var(--radius) var(--radius) 0 0;
    overflow-x: auto;
}

.tabs button {
    flex: 1 1 20%;
    min-width: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 7px 0 4px 0;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: #555;
    font-size: 0.98em;
    cursor: pointer;
    transition: background 0.2s, color 0.2s, border-bottom 0.2s;
    outline: none;
}

.tabs button.active {
    color: var(--main-blue);
    border-bottom: 2.5px solid var(--main-blue);
    background: #e9f1fb;
}

.tabs .material-icons {
    font-size: var(--icon-size);
    margin-bottom: 2px;
}

.category-label {
    display: flex;
    align-items: center;
    justify-content: left;
    gap: 8px;
    margin: 18px 0 8px 6px;
    font-size: 1.18em;
    color: #222;
    font-weight: 600;
}

.category-label .material-icons {
    font-size: 1.4em;
    color: var(--main-blue);
}

.convert-panel {
    background: #f9fbfd;
    border-radius: var(--radius);
    padding: 16px 10px 12px 10px;
    margin-bottom: 16px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.03);
}

.select-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
    margin-bottom: 10px;
    flex-wrap: wrap;
}

.select-row label {
    flex: 1 1 40%;
}

.arrow {
    font-size: 1.3em;
    color: var(--main-blue);
    font-weight: bold;
    margin: 0 4px;
}

.input-row {
    display: flex;
    align-items: center;
    gap: 6px;
    margin-bottom: 8px;
    justify-content: center;
}

.input-label {
    min-width: 38px;
    text-align: center;
    font-weight: bold;
    color: #0066cc;
    font-size: 1em;
    background: #f0f6ff;
    border-radius: 6px;
    padding: 3px 8px;
}

input[type="number"], select {
    width: 90px;
    padding: 8px;
    border-radius: 6px;
    border: 1px solid #bbb;
    font-size: 1em;
    box-sizing: border-box;
    margin: 0 2px;
}

input[type="number"] {
    width: 90px;
    text-align: right;
}

.selected-info {
    text-align: center;
    margin-bottom: 6px;
    color: #444;
    font-size: 1em;
}

.result {
    text-align: center;
    color: var(--main-blue);
    font-size: 1.15em;
    margin-bottom: 6px;
    font-weight: bold;
}

#allResults {
    margin-top: 10px;
}

#allResults table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 4px;
    font-size: 0.97em;
}

#allResults th, #allResults td {
    border: 1px solid var(--border);
    padding: 6px 7px;
    text-align: right;
}

#allResults th {
    background: #f0f6ff;
    color: #333;
    font-weight: bold;
}

#allResults td:first-child {
    text-align: left;
}

@media (max-width: 600px) {
    .container {
        max-width: 99vw;
        padding: 6vw 2vw 12vw 2vw;
    }
    .tabs button {
        min-width: 54px;
        font-size: 0.93em;
        padding: 7px 0 3px 0;
    }
    .category-label {
        font-size: 1.03em;
    }
    .convert-panel {
        padding: 10px 2vw 10px 2vw;
    }
    .input-row {
        flex-wrap: wrap;
        gap: 4px;
    }
}