:root {
    --bg-color: #0f0f13;
    --card-bg: #1a1a24;
    --primary-color: #00ff9d;
    /* Neon Green */
    --secondary-color: #ff00ff;
    /* Neon Magenta */
    --text-color: #e0e0e0;
    --muted-color: #888;
    --border-color: #333;
    --font-main: 'Mulmaru', sans-serif;
    --font-mono: 'MulmaruMono', monospace;
}

@font-face {
    font-family: 'Mulmaru';
    src: url('Mulmaru.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

@font-face {
    font-family: 'MulmaruMono';
    src: url('MulmaruMono.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
    font-display: swap;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    font-family: var(--font-main);
    line-height: 1.6;
    overflow-x: hidden;
	letter-spacing: 0.0909em;  /* 1/11 비율 (약 9.1%) */
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 2rem;
}

/* Typography & Glitch Effect */
h1,
h2 {
    font-size: 2.25rem;
    margin-bottom: 1rem;
}

h3 {
    font-size: 1.5rem;
    font-weight: normal;
}

h1.glitch {
    font-size: 6rem;
    position: relative;
    color: var(--primary-color);
    text-shadow: 2px 2px var(--secondary-color);
}

.subtitle {
    font-size: 1.5rem;
    color: var(--muted-color);
    margin-bottom: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 2rem;
    text-decoration: none;
    font-family: var(--font-main);
    font-size: 1.5rem;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all 0.2s;
    margin-right: 1rem;
}

.btn.primary {
    background-color: var(--primary-color);
    color: var(--bg-color);
    box-shadow: 4px 4px 0 var(--secondary-color);
}

.btn.primary:hover {
    transform: translate(2px, 2px);
    box-shadow: 2px 2px 0 var(--secondary-color);
}

.btn.secondary {
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.btn.secondary:hover {
    background-color: rgba(0, 255, 157, 0.1);
}

/* 깃허브 버튼 스타일 */
.btn.github {
    border-color: #ffffff;  /* 흰색 테두리 */
    color: #ffffff;         /* 흰색 글씨 */
}

/* 마우스 올렸을 때 효과 */
.btn.github:hover {
    background-color: #ffffff;   /* 배경이 흰색으로 채워짐 */
    color: var(--bg-color);      /* 글씨는 배경색(검정)으로 바뀜 */
    box-shadow: 2px 2px 0 rgba(255, 255, 255, 0.5); /* 은은한 그림자 */
}

/* Sections */
.section {
    margin: 4rem 0;
}

/* Gallery */
.gallery-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.gallery-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 255, 157, 0.2);
    border-color: var(--primary-color);
}

.gallery-item img {
    width: 100%;
    height: auto;
    display: block;
    transition: transform 0.3s ease;
}

.gallery-item:hover img {
    transform: scale(1.05);
}

/* Playground */
.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.toggle-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
}

.toggle-switch input {
    display: none;
}

.toggle-switch .slider {
    width: 50px;
    height: 26px;
    background-color: var(--border-color);
    position: relative;
    margin-right: 10px;
    transition: 0.2s;
}

.toggle-switch .slider:before {
    content: "";
    position: absolute;
    width: 18px;
    height: 18px;
    left: 4px;
    bottom: 4px;
    background-color: white;
    transition: 0.2s;
}

.toggle-switch input:checked+.slider {
    background-color: var(--primary-color);
}

.toggle-switch input:checked+.slider:before {
    transform: translateX(24px);
}

textarea {
    width: 100%;
    height: 200px;
    background-color: #000;
    color: var(--primary-color);
    border: 2px solid var(--border-color);
    padding: 1rem;
    font-family: var(--font-main);
    font-size: 24px;
    resize: vertical;
    outline: none;
}

textarea:focus {
    border-color: var(--primary-color);
}

/* Download Grid */
.download-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.download-card {
    background: rgba(255, 255, 255, 0.05);
    padding: 1.5rem;
    border: 1px solid var(--border-color);
    text-align: center;
}

.download-card p {
    font-size: 1.25rem;   /* 글자 크기 (기본 1rem = 16px 정도) */
}

.download-card.mono .preview-text {
    font-family: var(--font-mono);
}

.preview-text {
    font-size: 1.2rem;
    margin: 1.5rem 0;
    opacity: 0.8;
    min-height: 3em;
}

.download-btn {
    width: 100%;
    margin: 0;
    background-color: transparent;
    border: 2px solid var(--text-color);
    color: var(--text-color);
}

.download-btn:hover {
    background-color: var(--text-color);
    color: var(--bg-color);
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 4rem;
    padding-bottom: 2rem;
    color: var(--muted-color);
}

.creator {
    color: var(--primary-color);
}

/* Responsive */
@media (max-width: 600px) {
    h1.glitch {
        font-size: 2.5rem;
    }

    .hero-buttons {
        display: flex;
        flex-direction: column;
        gap: 1rem;
    }

    .btn {
        margin: 0;
        text-align: center;
    }
}

/* 본문 전체를 감싸는 박스 */
.card {
    margin-bottom: 6rem; /* 박스 아래 여백 */
}

/* 본문 */
.card p {
    font-size: 1.5rem;   /* 글자 크기 (기본 1rem = 16px 정도) */
    line-height: 1.75;    /* 줄 간격 (숫자가 클수록 줄 사이가 넓어짐) */
    color: var(--text-color);      /* 글자 색상 (약간 어두운 회색) */
    margin-top: 1.5rem;
    word-break: keep-all; /* 단어 중간에 줄바꿈 되지 않게 (한글에 좋음) */
}