/* ========== 公共顶部栏 ========== */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    z-index: 1000;
    transition: all 0.3s;
}

/* 左侧区域 */
.sh-left {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 头像 */
.sh-avatar {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    overflow: hidden;
    background: #333;
    flex-shrink: 0;
}
.sh-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

/* 信息区 */
.sh-info {
    display: flex;
    align-items: center;
    gap: 15px;
}
.sh-name {
    font-size: 14px;
    font-weight: bold;
}
.sh-assets {
    display: flex;
    gap: 10px;
}
.sh-gold, .sh-diamond {
    font-size: 12px;
    font-weight: bold;
    padding: 2px 10px;
    border-radius: 12px;
}

/* 右侧区域 */
.sh-right {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* 按钮基础样式 */
.site-header a {
    padding: 6px 18px;
    border-radius: 20px;
    font-size: 14px;
    text-decoration: none;
    transition: all 0.2s;
    cursor: pointer;
}

/* ===== Light 主题（首页）===== */
.site-header[data-theme="light"] {
    background: linear-gradient(90deg, #1e88e5, #1565c0);
    box-shadow: 0 2px 8px rgba(30, 136, 229, 0.3);
}
.site-header[data-theme="light"] .sh-avatar {
    border: 2px solid rgba(255,255,255,0.8);
    background: #fff;
}
.site-header[data-theme="light"] .sh-name {
    color: #fff;
}
.site-header[data-theme="light"] .sh-gold {
    color: #ffd700;
    background: rgba(0,0,0,0.2);
}
.site-header[data-theme="light"] .sh-diamond {
    color: #00e5ff;
    background: rgba(0,0,0,0.2);
}
.site-header[data-theme="light"] .btn-login {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.6);
    background: transparent;
}
.site-header[data-theme="light"] .btn-login:hover {
    background: rgba(255,255,255,0.15);
}
.site-header[data-theme="light"] .btn-register {
    color: #1565c0;
    background: #fff;
    border: none;
    font-weight: bold;
}
.site-header[data-theme="light"] .btn-register:hover {
    background: #e3f2fd;
}
.site-header[data-theme="light"] .btn-lobby {
    color: #1565c0;
    background: #fff;
    border: none;
    font-weight: bold;
}
.site-header[data-theme="light"] .btn-lobby:hover {
    background: #e3f2fd;
}
.site-header[data-theme="light"] .btn-logout {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.6);
    background: transparent;
}
.site-header[data-theme="light"] .btn-logout:hover {
    background: rgba(255,255,255,0.15);
}

/* ===== Dark 主题（内页）===== */
.site-header[data-theme="dark"] {
    background: rgba(0,0,0,0.4);
    border-bottom: 1px solid rgba(255,255,255,0.1);
}
.site-header[data-theme="dark"] .sh-avatar {
    border: 2px solid #ffd700;
}
.site-header[data-theme="dark"] .sh-name {
    color: #fff;
    text-shadow: 1px 1px 2px rgba(0,0,0,0.5);
}
.site-header[data-theme="dark"] .sh-gold {
    color: #ffd700;
    background: rgba(0,0,0,0.3);
}
.site-header[data-theme="dark"] .sh-diamond {
    color: #00e5ff;
    background: rgba(0,0,0,0.3);
}
.site-header[data-theme="dark"] .btn-login {
    color: #fff;
    border: 1px solid rgba(255,255,255,0.4);
    background: transparent;
}
.site-header[data-theme="dark"] .btn-login:hover {
    background: rgba(255,255,255,0.1);
}
.site-header[data-theme="dark"] .btn-register {
    color: #333;
    background: #ffd700;
    border: none;
    font-weight: bold;
}
.site-header[data-theme="dark"] .btn-register:hover {
    background: #ffeb3b;
}

/* ========== 手机端适配 ========== */
@media (max-width: 768px) {
    .site-header {
        height: 40px;
        padding: 0 10px;
    }
    .sh-left {
        gap: 6px;
    }
    .sh-avatar {
        width: 28px;
        height: 28px;
    }
    .sh-info {
        gap: 8px;
    }
    .sh-name {
        font-size: 12px;
    }
    .sh-assets {
        gap: 6px;
    }
    .sh-gold, .sh-diamond {
        font-size: 10px;
        padding: 1px 6px;
        border-radius: 10px;
    }
    .sh-right {
        gap: 6px;
    }
    .site-header a {
        padding: 4px 10px;
        font-size: 12px;
        border-radius: 15px;
    }
}

@media (max-width: 380px) {
    .sh-info {
        gap: 4px;
    }
    .sh-name {
        font-size: 11px;
        max-width: 80px;
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
    }
    .sh-gold, .sh-diamond {
        font-size: 9px;
        padding: 1px 4px;
    }
    .site-header a {
        padding: 3px 8px;
        font-size: 11px;
    }
}