/* ============================================================
   FreeDY 手机端底部导航栏样式
   仅在 max-width: 767px 下显示
   ============================================================ */

/* ── 底部导航栏 ───────────────────────────────────────────── */
.mobile-bottom-nav {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 9999;
    height: 56px;
    /* NOTE: iOS safe area 底部安全区适配 */
    padding-bottom: env(safe-area-inset-bottom, 0px);
    background: rgba(10, 10, 15, 0.96);
    -webkit-backdrop-filter: blur(20px);
    backdrop-filter: blur(20px);
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: none; /* 默认隐藏，仅手机端显示 */
    justify-content: space-around;
    align-items: center;
}

/* ── 导航项 ───────────────────────────────────────────────── */
.mobile-nav-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2px;
    padding: 6px 16px;
    min-width: 64px;
    min-height: 44px;
    color: #6a6a7a;
    font-size: 10px;
    font-weight: 500;
    letter-spacing: 0.02em;
    background: none;
    border: none;
    cursor: pointer;
    -webkit-tap-highlight-color: transparent;
    transition: color 0.2s ease;
    position: relative;
}

.mobile-nav-item svg {
    width: 22px;
    height: 22px;
    stroke-width: 1.8;
    transition: transform 0.2s ease;
}

/* 激活态 */
.mobile-nav-item.active {
    color: #e50914;
}

.mobile-nav-item.active svg {
    transform: scale(1.1);
}

/* 激活指示器（顶部小圆点） */
.mobile-nav-item.active::before {
    content: '';
    position: absolute;
    top: 2px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 4px;
    border-radius: 50%;
    background: #e50914;
}

/* 按下态 */
.mobile-nav-item:active {
    color: #e50914;
    opacity: 0.8;
}

.mobile-nav-item:active svg {
    transform: scale(0.92);
}

/* ── 响应式控制 ───────────────────────────────────────────── */
@media (max-width: 767px) {
    .mobile-bottom-nav {
        display: flex;
    }

    /* 为底部导航栏留出空间 */
    body {
        padding-bottom: calc(56px + env(safe-area-inset-bottom, 0px));
    }

    /* 首页顶部角落按钮隐藏（已有底部导航栏） */
    .app-corner {
        display: none;
    }
}

/* 非手机端不显示 */
@media (min-width: 768px) {
    .mobile-bottom-nav {
        display: none !important;
    }
}

/* 播放器页面隐藏底部导航栏（沉浸式观看） */
body.player-page .mobile-bottom-nav {
    display: none !important;
}

body.player-page {
    padding-bottom: 0 !important;
}

/* TV 模式隐藏底部导航栏 */
body.tv-mode .mobile-bottom-nav {
    display: none !important;
}