* {
    box-sizing: border-box;
}

:root {
    --bg-overlay: rgba(30, 20, 10, 0.85);
    --main-color: #fcfaf2;
    --accent-color: #d4a017;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: 'Sawarabi Mincho', serif;
    color: var(--main-color);
    background: #1a0f0a url('image/boya_bg.jpg') no-repeat center center fixed;
    background-size: cover;
    display: flex;
    justify-content: center;
    align-items: center;
}

#ui-container {
    width: 95%;
    max-width: 420px;
    z-index: 10;
}

.outer-frame {
    border: 1px solid rgba(252, 250, 242, 0.4);
    padding: 5px;
}

.container {
    border: 3px double var(--main-color);
    padding: 30px 15px;
    text-align: center;
    background-color: var(--bg-overlay);
    backdrop-filter: blur(3px);
}

.deco-line {
    color: var(--accent-color);
    margin-bottom: 15px;
}

.main-symbol {
    width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

.nav-list {
    list-style: none;
    padding: 0;
    margin-top: 20px;
}

.video-trigger {
    cursor: pointer;
    padding: 15px;
    border: 1px solid var(--main-color);
    margin-bottom: 15px;
    transition: background-color 0.3s, color 0.3s;
}

.video-trigger:active {
    background: var(--main-color);
    color: #000;
}

.category {
    font-size: 0.7rem;
    color: var(--accent-color);
}

.omake-group {
    display: flex;
    gap: 10px;
    justify-content: center;
    margin-top: 25px;
    flex-wrap: wrap;
}

.omake-item {
    font-size: 0.8rem;
    color: var(--main-color);
    text-decoration: none;
    border: 1px solid var(--accent-color);
    padding: 8px 12px;
}

.ar-link-item {
    margin-top: 30px;
}

/* ARリンクを目立つボタン風に */
.ar-link-btn {
    display: inline-block;
    color: #1a0f0a;
    background-color: var(--accent-color);
    padding: 12px 24px;
    font-size: 0.9rem;
    text-decoration: none;
    font-weight: bold;
    border-radius: 5px;
    box-shadow: 0 0 10px rgba(212, 160, 23, 0.5);
    letter-spacing: 0.1em;
}

/* 以下、モーダル（動画再生）関連 */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0,0,0,0.95);
    z-index: 2000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background: #1a0f0a;
    padding: 25px;
    border: 1px solid var(--accent-color);
    width: 90%;
    max-width: 380px;
    text-align: center;
}

.modal-title {
    color: var(--accent-color);
    margin-bottom: 15px;
}

.lang-menu {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin: 20px 0;
}

.lang-btn {
    padding: 12px;
    background: transparent;
    border: 1px solid var(--main-color);
    color: var(--main-color);
    cursor: pointer;
    font-family: 'Sawarabi Mincho', serif;
}

.video-fixed-container {
    width: 95%;
    max-width: 500px;
}

video {
    width: 100%;
    border: 1px solid var(--accent-color);
}

.video-footer {
    margin-top: 15px;
    text-align: center;
}

.close-text-btn {
    cursor: pointer;
    color: var(--accent-color);
    text-decoration: underline;
    font-size: 0.9rem;
}