* {
    box-sizing: border-box;
}

:root {
    --background: #111416;
    --panel: #1b2023;
    --panel-light: #242b2f;
    --text: #f1f1eb;
    --subtext: #aeb6b8;
    --line: #586267;
    --accent: #d9d6bd;
    --accent-dark: #252a2c;
}

html {
    min-height: 100%;
}

body {
    min-height: 100vh;
    margin: 0;
    background:
        linear-gradient(
            rgba(255, 255, 255, 0.015) 1px,
            transparent 1px
        ),
        linear-gradient(
            90deg,
            rgba(255, 255, 255, 0.015) 1px,
            transparent 1px
        ),
        var(--background);
    background-size: 24px 24px;
    color: var(--text);
    font-family:
        -apple-system,
        BlinkMacSystemFont,
        "Hiragino Kaku Gothic ProN",
        "Yu Gothic",
        "Meiryo",
        sans-serif;
}

button {
    font: inherit;
}

.site-container {
    width: min(100% - 32px, 760px);
    min-height: 100vh;
    margin: 0 auto;
    padding: 24px 0 48px;
}

.language-switcher {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
    margin-bottom: 24px;
}

.language-button {
    min-width: 88px;
    padding: 9px 14px;
    border: 1px solid var(--line);
    background: transparent;
    color: var(--subtext);
    cursor: pointer;
}

.language-button.active {
    background: var(--accent);
    color: var(--accent-dark);
    border-color: var(--accent);
}

.screen {
    display: none;
}

.screen.active {
    display: block;
}

.panel {
    width: 100%;
    padding: 48px;
    border: 1px solid var(--line);
    background: rgba(27, 32, 35, 0.96);
    box-shadow: 12px 12px 0 rgba(0, 0, 0, 0.25);
}

.title-panel {
    min-height: 540px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    text-align: center;
}

.small-heading {
    margin: 0 0 18px;
    color: var(--subtext);
    font-size: 13px;
    letter-spacing: 0.22em;
}

h1 {
    margin: 0;
    font-size: clamp(36px, 7vw, 60px);
    line-height: 1.25;
}

.title-description {
    margin: 28px 0 46px;
    color: var(--subtext);
    font-size: clamp(16px, 3vw, 21px);
    line-height: 1.8;
}

.main-button,
.sub-button {
    width: 100%;
    min-height: 58px;
    padding: 14px 20px;
    border: 1px solid var(--accent);
    cursor: pointer;
    transition:
        transform 0.15s ease,
        background-color 0.15s ease,
        color 0.15s ease;
}

.main-button {
    background: var(--accent);
    color: var(--accent-dark);
    font-weight: 700;
}

.sub-button {
    background: transparent;
    color: var(--text);
}

.main-button:hover,
.sub-button:hover {
    transform: translateY(-2px);
}

.main-button:active,
.sub-button:active {
    transform: translateY(0);
}

.question-panel {
    min-height: 580px;
    display: flex;
    flex-direction: column;
}

.question-counter {
    margin: 0;
    color: var(--subtext);
    font-size: 15px;
    letter-spacing: 0.08em;
}

.question-text {
    min-height: 190px;
    margin: 32px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: clamp(22px, 4vw, 32px);
    line-height: 1.7;
    text-align: center;
}

.answer-labels {
    display: flex;
    justify-content: space-between;
    gap: 16px;
    margin-bottom: 14px;
    color: var(--subtext);
    font-size: 14px;
}

.answer-labels span:last-child {
    text-align: right;
}

.answer-buttons {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
    margin-bottom: 36px;
}

.answer-button {
    aspect-ratio: 1 / 1;
    min-width: 0;
    border: 1px solid var(--line);
    border-radius: 50%;
    background: var(--panel-light);
    color: var(--text);
    font-size: clamp(18px, 4vw, 25px);
    cursor: pointer;
    transition:
        transform 0.15s ease,
        background-color 0.15s ease,
        color 0.15s ease;
}

.answer-button:hover {
    transform: scale(1.08);
    background: var(--accent);
    color: var(--accent-dark);
}

.answer-button.selected {
    background: var(--accent);
    color: var(--accent-dark);
    border-color: var(--accent);
}

#back-button:disabled {
    opacity: 0.35;
    cursor: not-allowed;
    transform: none;
}

.result-panel {
    text-align: center;
}

.result-code {
    margin: 8px 0;
    color: var(--accent);
    font-family: "Courier New", monospace;
    font-size: clamp(56px, 13vw, 92px);
    font-weight: 700;
    letter-spacing: 0.13em;
    line-height: 1;
}

.result-name {
    margin: 25px 0 34px;
    font-size: clamp(27px, 5vw, 42px);
}

.code-explanation {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 10px;
    margin-bottom: 34px;
}

.code-item {
    padding: 14px 8px;
    border: 1px solid var(--line);
    background: var(--panel-light);
}

.code-letter {
    display: block;
    margin-bottom: 7px;
    color: var(--accent);
    font-family: "Courier New", monospace;
    font-size: 27px;
    font-weight: 700;
}

.code-word {
    display: block;
    font-size: 13px;
    line-height: 1.5;
}

.result-description-box {
    padding: 28px;
    border-top: 1px solid var(--line);
    border-bottom: 1px solid var(--line);
    text-align: left;
}

.result-description-box h3 {
    margin: 0 0 17px;
    color: var(--subtext);
    font-size: 15px;
    font-weight: normal;
    letter-spacing: 0.08em;
}

#result-description {
    margin: 0;
    font-size: 18px;
    line-height: 2;
    white-space: pre-line;
}

.result-buttons {
    display: grid;
    gap: 12px;
    margin-top: 32px;
}

.copy-message {
    min-height: 24px;
    margin: 18px 0 0;
    color: var(--accent);
    font-size: 14px;
}

@media (max-width: 600px) {
    .site-container {
        width: min(100% - 20px, 760px);
        padding-top: 14px;
    }

    .language-switcher {
        margin-bottom: 14px;
    }

    .language-button {
        min-width: 78px;
        padding: 8px 10px;
        font-size: 13px;
    }

    .panel {
        padding: 30px 20px;
        box-shadow: 6px 6px 0 rgba(0, 0, 0, 0.25);
    }

    .title-panel {
        min-height: 470px;
    }

    .question-panel {
        min-height: 520px;
    }

    .question-text {
        min-height: 180px;
        margin: 24px 0;
    }

    .answer-buttons {
        gap: 7px;
    }

    .code-explanation {
        grid-template-columns: repeat(2, 1fr);
    }

    .result-description-box {
        padding: 24px 4px;
    }
}

.code-item{
    text-align:left;
}

.code-item strong{
    display:block;
    margin-top:8px;
    color:#f1f1eb;
    font-size:15px;
}

.code-item p{
    color:#b8c0c3;
}

.result-image{
    width:160px;
    height:160px;
    object-fit:contain;

    display:block;
    margin:24px auto;
}

.footer-credit{
    margin-top:40px;
    padding-top:24px;

    border-top:1px solid #444;

    font-size:12px;

    color:#8f989d;

    line-height:1.8;

    text-align:center;
}

.footer-credit p{
    margin:4px 0;
}